{"id":2632,"date":"2021-06-01T09:43:33","date_gmt":"2021-06-01T09:43:33","guid":{"rendered":"https:\/\/hqeialdi5a.wpdns.site\/?p=2632"},"modified":"2024-02-02T06:32:04","modified_gmt":"2024-02-02T06:32:04","slug":"9-questions-hydraulic-pump-parameter-calculation","status":"publish","type":"post","link":"https:\/\/www.yaiwo.com\/pl\/9-questions-hydraulic-pump-parameter-calculation\/","title":{"rendered":"9 pyta\u0144 dotycz\u0105cych obliczania parametr\u00f3w pompy hydraulicznej, kt\u00f3re powiniene\u015b wiedzie\u0107"},"content":{"rendered":"<p class=\"yoast-reading-time__wrapper\"><span class=\"yoast-reading-time__icon\"><\/span><span class=\"yoast-reading-time__descriptive-text\">Szacowany czas czytania:  <\/span><span class=\"yoast-reading-time__reading-time\">24<\/span><span class=\"yoast-reading-time__time-unit\"> minuty<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-selection-of-hydraulic-pump\"><strong>Dob\u00f3r pompy hydraulicznej<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ten <a href=\"https:\/\/www.youtube.com\/watch?v=kP6gNQ700UM\" target=\"_blank\" rel=\"noopener\">pompa hydrauliczna<\/a> to urz\u0105dzenie do konwersji energii, kt\u00f3re przekszta\u0142ca energi\u0119 mechaniczn\u0105 silnika nap\u0119dowego w energi\u0119 ci\u015bnienia oleju, aby zaspokoi\u0107 potrzeby si\u0142ownika do nap\u0119dzania obci\u0105\u017cenia zewn\u0119trznego.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-1-hydraulic-pump-performance\"><strong>Pytanie 1: Wydajno\u015b\u0107 pompy hydraulicznej<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">G\u0142\u00f3wne osi\u0105gi powszechnie stosowanych pomp hydraulicznych przedstawiono w tabeli.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Wydajno\u015b\u0107<\/td><td class=\"has-text-align-center\" data-align=\"center\">Zewn\u0119trzna pompa z\u0119bata<\/td><td class=\"has-text-align-center\" data-align=\"center\">Pompa \u0142opatkowa dwustronnego dzia\u0142ania<\/td><td class=\"has-text-align-center\" data-align=\"center\">Ograniczaj\u0105ca ci\u015bnienie pompa o zmiennej \u0142opatce<\/td><td class=\"has-text-align-center\" data-align=\"center\">Pompa t\u0142okowa promieniowa<\/td><td class=\"has-text-align-center\" data-align=\"center\">Osiowa pompa t\u0142okowa<\/td><td class=\"has-text-align-center\" data-align=\"center\">Pompa \u015brubowa<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Ci\u015bnienie wyj\u015bciowe<\/td><td class=\"has-text-align-center\" data-align=\"center\">Niskie ci\u015bnienie<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u015arednie ci\u015bnienie<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u015arednie ci\u015bnienie<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wysokie ci\u015bnienie<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wysokie ci\u015bnienie<\/td><td class=\"has-text-align-center\" data-align=\"center\">Niskie ci\u015bnienie<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Regulacja przep\u0142ywu<\/td><td class=\"has-text-align-center\" data-align=\"center\">Nie<\/td><td class=\"has-text-align-center\" data-align=\"center\">Nie <\/td><td class=\"has-text-align-center\" data-align=\"center\">Nie<\/td><td class=\"has-text-align-center\" data-align=\"center\">tak<\/td><td class=\"has-text-align-center\" data-align=\"center\">tak<\/td><td class=\"has-text-align-center\" data-align=\"center\">Nie<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Skuteczno\u015b\u0107<\/td><td class=\"has-text-align-center\" data-align=\"center\">Niski<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wy\u017cszy<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wy\u017cszy<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wysoki<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wysoki <\/td><td class=\"has-text-align-center\" data-align=\"center\">Wy\u017cszy<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Pulsacja przep\u0142ywu wyj\u015bciowego<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bardzo du\u017cy<\/td><td class=\"has-text-align-center\" data-align=\"center\">Najmniejszy<\/td><td class=\"has-text-align-center\" data-align=\"center\">Og\u00f3lny<\/td><td class=\"has-text-align-center\" data-align=\"center\">Og\u00f3lny<\/td><td class=\"has-text-align-center\" data-align=\"center\">Og\u00f3lny<\/td><td class=\"has-text-align-center\" data-align=\"center\">Najmniejszy<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">W\u0142a\u015bciwo\u015bci samozasysaj\u0105ce<\/td><td class=\"has-text-align-center\" data-align=\"center\">Dobry <\/td><td class=\"has-text-align-center\" data-align=\"center\">Stosunkowo biedny<\/td><td class=\"has-text-align-center\" data-align=\"center\">Stosunkowo biedny<\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\">S\u0142aby<\/td><td class=\"has-text-align-center\" data-align=\"center\">Dobry<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-2-selection-of-hydraulic-pump-type\"><strong>Pytanie 2: Wyb\u00f3r typu pompy hydraulicznej<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"452\" height=\"274\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2.jpg\" alt=\"Hydraulic Pump Parameter\" class=\"wd-lazy-fade wp-image-2646\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2.jpg 452w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2-300x182.jpg 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2-150x91.jpg 150w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The principle of selecting the hydraulic pump is: according to the working condition of the main engine, the size of the power and the performance requirements of the system, first determine the type of the hydraulic pump, and then determine its specification and model according to the pressure and flow required by the system. Hydraulic Pump Parameter<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Do og\u00f3lnych uk\u0142ad\u00f3w hydraulicznych obrabiarek, \u0142opatka dwustronnego dzia\u0142ania<a href=\"https:\/\/www.yaiwo.com\/pl\/introduction-of-hydraulic-pump\/\"> lakierki<\/a>,\u00a0and pressure-limiting variable vane pumps are often used; while road construction machinery, port machinery,\u00a0and small construction machinery, gear pumps with strong anti-pollution capabilities are often selected; In occasions, plunger pumps are often chosen. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Pay attention to whether the flow of the hydraulic pump is adjustable. Generally speaking, if the hydraulic power is less than 10kW, the working cycle is on-off, the hydraulic pump can be completely unloaded when not in use, and the hydraulic pump is required to output full flow under most working conditions, you can consider using a fixed pump; if the hydraulic power If the flow rate is larger than 10KW, the variable pump can be considered. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Pay attention to parallel pumps and series pumps. Gear pumps and vane pumps can also be made into several pumps connected in parallel, and use a double pump or triple pump with the same drive shaft, or can be connected in series to form a multi-stage pump. When the hydraulic system-the flow rate changes greatly within a working cycle, multiple pumps can be used. Multiple pumps usually have one oil suction port and multiple oil outlets. The pressure oil from each oil outlet can supply oil to different actuators of the system, or can be combined to supply a certain actuator. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-hydraulic-pump-parameter-calculation\"><strong>Obliczanie parametr\u00f3w pompy hydraulicznej<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-1-calculate-the-maximum-working-pressure-of-the-hydraulic-pump\"><strong>Pytanie 1: Oblicz maksymalne ci\u015bnienie robocze pompy hydraulicznej<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Maksymalne ci\u015bnienie robocze P<sub>P<\/sub>&nbsp;pompy hydraulicznej zale\u017cy od maksymalnego ci\u015bnienia roboczego si\u0142ownika (si\u0142ownik hydrauliczny lub silnik hydrauliczny), a mianowicie<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">P<sub>P<\/sub>\u2265P<sub>1<\/sub>+ p<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-2-calculate-the-maximum-flow-rate-of-the-hydraulic-pump\"><strong>Pytanie 2: Oblicz maksymalne nat\u0119\u017cenie przep\u0142ywu pompy hydraulicznej<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Maksymalny przep\u0142yw q<sub>P<\/sub>\u00a0(m<sup>3<\/sup>\/s) g\u0142\u00f3wnej pompy hydraulicznej w zale\u017cno\u015bci od przep\u0142ywu q<sub>v<\/sub>\u00a0required by the system. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">W przypadku systemu, w kt\u00f3rym jednocze\u015bnie dzia\u0142a wiele cylindr\u00f3w hydraulicznych lub silnik\u00f3w hydraulicznych, maksymalne nat\u0119\u017cenie przep\u0142ywu pompy hydraulicznej powinno by\u0107<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Q<sub>P<\/sub>\u2265q<sub>v<\/sub>\uff1dK( \u2211q)max &nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-3-calculation-of-small-pump-flow-when-calculating-double-pump-oil-supply\"><strong>Pytanie 3: Obliczanie przep\u0142ywu ma\u0142ej pompy przy obliczaniu dop\u0142ywu oleju do pompy podw\u00f3jnej<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the oil supply of the hydraulic pump is selected according to the working conditions (for example, when two pumps are used for oil supply, the small flow pump supplies the flow of the working conditions), the minimum overflow of the overflow valve should also be considered when calculating the oil supply. Hydraulic Pump Parameter<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-4-select-the-rated-pressure-of-the-hydraulic-pump-to-determine\"><strong>Pytanie 4: Wybierz ci\u015bnienie znamionowe pompy hydraulicznej do okre\u015blenia<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"400\" height=\"400\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1.jpg\" alt=\"pompa hydrauliczna\" class=\"wd-lazy-fade wp-image-2648\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1.jpg 400w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1-300x300.jpg 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1-150x150.jpg 150w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1-12x12.jpg 12w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The pressure of the hydraulic pump obtained by the above calculation is the static pressure of the system. In the dynamic working process of the system, the dynamic pressure of the system far exceeds the static pressure due to pressure overshoot or periodic pressure pulsation during the transition process. Therefore, when selecting a hydraulic pump, the rated pressure of the hydraulic pump should be 25%~60% higher than the maximum calculated pressure of the system (a high-pressure system takes a small value, medium and\u00a0the low-pressure system takes the larger value) so that the hydraulic pump has a certain pressure reserve. Hydraulic Pump Parameter<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Generally speaking, in fixed equipment, the rated pressure of the hydraulic pump should be about 25% higher than the normal working pressure, and the rated pressure of the hydraulic pump for vehicles should be about 45% higher than the normal working pressure to ensure the pump has a sufficient life. If the reliability requirements of the hydraulic system are particularly high, the rated working pressure of the hydraulic pump can be selected higher. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>If the hydraulic system only requires the supply of high-pressure and small-flow working medium in a short period, the maximum working pressure of the hydraulic pump can be selected smaller at this time (when selecting a hydraulic pump, it is not advisable to reduce the specifications of the large-capacity hydraulic pump. It is because when the working pressure and working flow of the hydraulic pump are less than its rated value, the overall efficiency of the hydraulic pump will decrease). Hydraulic Pump Parameter<\/li>\n\n\n\n<li>The highest working pressure on the sample is the allowable pressure during short-term impact. Do not have impact pressure in every cycle, otherwise,\u00a0the life of the hydraulic pump will be significantly shortened or even damaged. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-5-select-the-rated-flow-of-the-hydraulic-pump-to-determine\"><strong>Pytanie 5: Wybierz znamionowy przep\u0142yw pompy hydraulicznej do okre\u015blenia<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"404\" height=\"265\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.png\" alt=\"pompa hydrauliczna\" class=\"wd-lazy-fade wp-image-2652\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.png 404w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-300x197.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-18x12.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-150x98.png 150w\" sizes=\"(max-width: 404px) 100vw, 404px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Je\u015bli chodzi o nat\u0119\u017cenie przep\u0142ywu pompy hydraulicznej, podczas wyboru mo\u017cna wybra\u0107 maksymalne nat\u0119\u017cenie przep\u0142ywu wymagane przez system i nie powinno ono przekracza\u0107 zbyt du\u017cego, aby unikn\u0105\u0107 nadmiernej utraty mocy. Po opracowaniu struktury pompy hydraulicznej, specyfikacje i modele pompy hydraulicznej mo\u017cna okre\u015bli\u0107, odnosz\u0105c si\u0119 do odpowiednich instrukcji technicznych lub pr\u00f3bek produkt\u00f3w, zgodnie z maksymalnym ci\u015bnieniem roboczym i maksymalnym przep\u0142ywem wyj\u015bciowym pompy hydraulicznej.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">W rzeczywistym doborze, poniewa\u017c pojemno\u015b\u0107 pompy, zakres pr\u0119dko\u015bci i przep\u0142yw wyj\u015bciowy pod r\u00f3\u017cnymi ci\u015bnieniami przy typowej pr\u0119dko\u015bci s\u0105 zwykle podane na pr\u00f3bce produktu. Dlatego, gdy wymagany przep\u0142yw q<sub>v<\/sub><img decoding=\"async\" width=\"13\" height=\"20\" src=\"\" alt=\"\" title=\"\"> uk\u0142adu jest znana, nat\u0119\u017cenie przep\u0142ywu pompy q<sub>P<\/sub> (l\/min), pr\u0119dko\u015b\u0107 n (obr\/min) i przemieszczenie V (ml\/obr) nale\u017cy rozpatrywa\u0107 kompleksowo. W rzeczywisto\u015bci, poniewa\u017c przep\u0142yw wyj\u015bciowy <img decoding=\"async\" width=\"13\" height=\"20\" src=\"\" alt=\"\" title=\"\">pompy jest<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;Q<sub>P<\/sub>Vn\u03b7<sub>v<\/sub>\u00d710<sup>-3<\/sup><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The output flow of the hydraulic pump should include the flow required by the actuator (the total flow can be obtained from the time chart when there are multiple actuators), the minimum overflow flow of the overflow valve, the sum of the leakage of each component, and the motor reverse rotation (usually 1r\/s or so), the flow reduction caused by the reduction in efficiency of the hydraulic pump after long-term use (usually 5% to 7%). Hydraulic Pump Parameter<\/li>\n\n\n\n<li>The flow rate of the hydraulic pump is related to the working condition, and the maximum flow rate of the hydraulic pump is determined by the maximum flow rate in the system working condition diagram. When selecting the flow rate of the hydraulic pump, it should not be less than or equal to the maximum flow rate when the hydraulic system is working. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>The flow rate of the hydraulic pump is related to the speed of the prime mover. When the prime mover and the hydraulic pump are connected by a coupling, the speed of the prime mover should be within the working speed range of the hydraulic pump, otherwise, a speed increasing or decelerating device should be installed between the prime mover and the hydraulic pump. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-6-regarding-the-speed-and-efficiency-of-the-pump\"><strong>Pytanie 6: Odno\u015bnie pr\u0119dko\u015bci i wydajno\u015bci pompy<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"301\" height=\"218\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3.png\" alt=\"pompa hydrauliczna\" class=\"wd-lazy-fade wp-image-2655\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3.png 301w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3-18x12.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3-150x109.png 150w\" sizes=\"(max-width: 301px) 100vw, 301px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Aby przed\u0142u\u017cy\u0107 \u017cywotno\u015b\u0107 pompy hydraulicznej, nale\u017cy jednocze\u015bnie stosowa\u0107 maksymalne ci\u015bnienie i maksymaln\u0105 pr\u0119dko\u015b\u0107 pompy hydraulicznej. Instrukcja produktu zawiera bardziej szczeg\u00f3\u0142ow\u0105 tabel\u0119 przewodni\u0105 parametr\u00f3w pompy hydraulicznej. Przy wyborze nale\u017cy \u015bci\u015ble przestrzega\u0107 przepis\u00f3w zawartych w instrukcji produktu.<\/li>\n\n\n\n<li>Im wy\u017csze ci\u015bnienie i im ni\u017csza pr\u0119dko\u015b\u0107, tym ni\u017csza sprawno\u015b\u0107 wolumetryczna pompy hydraulicznej, a sprawno\u015b\u0107 wolumetryczna pompy o zmiennej wydajno\u015bci zmniejszy si\u0119 po wyregulowaniu pojemno\u015bci skokowej pompy o zmiennej wydajno\u015bci. Gdy pr\u0119dko\u015b\u0107 jest sta\u0142a, ca\u0142kowita wydajno\u015b\u0107 pompy hydraulicznej jest najwy\u017csza przy okre\u015blonym ci\u015bnieniu, a ca\u0142kowita wydajno\u015b\u0107 pompy zmiennej jest najwy\u017csza przy okre\u015blonym wydatku i okre\u015blonym ci\u015bnieniu. Ca\u0142kowita sprawno\u015b\u0107 pompy hydraulicznej ma du\u017cy wp\u0142yw na sprawno\u015b\u0107 uk\u0142adu hydraulicznego. Dlatego wyb\u00f3r pompy hydraulicznej o niskiej wydajno\u015bci jest tematem tabu. Powiniene\u015b wybra\u0107 wysokowydajn\u0105 pomp\u0119 hydrauliczn\u0105 i stara\u0107 si\u0119, aby pompa hydrauliczna pracowa\u0142a w wydajnym obszarze roboczym.<\/li>\n\n\n\n<li>Consider the problem from the perspective of improving energy conversion efficiency. Don&#8217;t just consider the rated working conditions, but should make the efficient working range as wide as possible. When choosing a hydraulic pump, do not reduce the specification of a large-capacity pump. This is because when the pump&#8217;s working pressure and working flow are less than its rated value, the overall efficiency of the pump will decrease. Generally speaking, the volumetric efficiency of the hydraulic pump is more important than the mechanical efficiency. Because the hydraulic pump can obtain power from the prime mover to compensate for the mechanical friction loss, but the leakage loss in the hydraulic pump cannot be compensated by increasing the power input. Of course, the rotational speed of the hydraulic pump should not be too high or too low, otherwise,\u00a0its mechanical efficiency will decrease. It is generally believed that when the hydraulic pump works in the range of 1000~1800r\/min, it has little effect on the overall efficiency. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>In the case of using an engine to drive the hydraulic pump, low speed is prohibited when the oil temperature is low, otherwise,\u00a0it will be difficult to absorb oil, and there will be a risk of seizing failure due to poor lubrication; at high speeds, cavitation, vibration, abnormal wear,\u00a0and flow must be considered The possibility of instability and other phenomena, to avoid drastic changes in the speed of the hydraulic pump from having a huge impact on the strength of the internal parts of the hydraulic pump. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-7-calculate-the-drive-power-of-the-hydraulic-pump\"><strong>Pytanie 7: Oblicz moc nap\u0119du pompy hydraulicznej<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Je\u017celi ci\u015bnienie i wydatek pompy s\u0105 w trakcie cyklu pracy wzgl\u0119dnie sta\u0142e (czyli krzywa pt i krzywa qt na wykresie stanu pracy zmieniaj\u0105 si\u0119 bardziej p\u0142ynnie), to moc nap\u0119du pompy hydraulicznej P<sub>P<\/sub> Should be calculated as follows Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">P<sub>P<\/sub>P<sub>P<\/sub>Q<sub>P<\/sub>\/\u03b7<sub>P<\/sub><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-8-the-choice-of-motor\"><strong>Pytanie 8: Wyb\u00f3r silnika<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"324\" height=\"347\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1.png\" alt=\"pompa hydrauliczna\" class=\"wd-lazy-fade wp-image-2656\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1.png 324w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1-280x300.png 280w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1-11x12.png 11w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1-150x161.png 150w\" sizes=\"(max-width: 324px) 100vw, 324px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Przy doborze silnika elektrycznego pompy hydraulicznej nale\u017cy r\u00f3wnie\u017c uwzgl\u0119dni\u0107 wsp\u00f3\u0142czynnik wp\u0142ywu pr\u0119dko\u015bci. Pr\u0119dko\u015b\u0107 synchroniczna silnika elektrycznego nie mo\u017ce by\u0107 wy\u017csza ni\u017c pr\u0119dko\u015b\u0107 znamionowa pompy hydraulicznej.<\/li>\n\n\n\n<li>Hydraulic pumps of fixed equipment are usually driven by electric motors. According to the power calculated above and the rotational speed of the hydraulic pump and its use environment, select its model specifications from the product catalog or manual (rated power, rotational speed, power supply, structure (vertical, horizontal, open, closed, etc.) ], and calculate the overload capacity to ensure that the peak overload of the motor is less than 25%~50% in each working stage. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Since the hydraulic pump usually starts under no load, there is no excessively high requirement on the starting torque of the motor, the load changes relatively smoothly, and the number of starts is small, so a cage-type three-phase asynchronous motor can be used. But if the power of the hydraulic system is large and the grid capacity is not large, a wound rotor motor can be used. For hydraulic pumps that adopt variable frequency flow adjustment schemes, AC asynchronous motors controlled by variable frequency speed regulation or electromagnetic speed regulation should be used to drive the hydraulic pump. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Motors of the same type with the same capacity (power) usually have different speeds for selection. Low-speed motors have a large number of magnetic poles, large dimensions and weights, high prices, and require pumps with a large displacement (under a certain flow rate), while high-speed motors are the opposite. Therefore, the speed of the motor should be considered comprehensively with the flow and displacement of the pump. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>The working environment of the hydraulic pump is different, and the protection form of its drive motor is required to be different: an open motor (protection mark is IP11) should be used in a clean and dry environment; a protective motor should be used in a cleaner and clean environment (protection mark is IP22 and IP23) drive; humid, dusty, high temperature, corrosive or weather-prone environments should be driven by enclosed motors (protection mark IP44); explosion-proof motors should be used in explosive environments. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-9-the-choice-of-internal-combustion-engine\"><strong>Pytanie 9: Wyb\u00f3r silnika spalinowego<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"400\" height=\"312\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1.png\" alt=\"pompa hydrauliczna\" class=\"wd-lazy-fade wp-image-2658\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1.png 400w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1-300x234.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1-15x12.png 15w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1-150x117.png 150w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Wi\u0119kszo\u015b\u0107 uk\u0142ad\u00f3w hydraulicznych maszyn mobilnych wykorzystuje silniki spalinowe do nap\u0119dzania pomp hydraulicznych.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the hydraulic pump is driven by an internal combustion engine, in one case, the hydraulic pump is only a part of the internal combustion engine&#8217;s drive load; in another case, the entire power of the internal combustion engine is used to drive the hydraulic pump. In the former, the power of the internal combustion engine is large, which can always meet the power required by the hydraulic pump. The speed of the internal combustion engine should match the optimal speed of the hydraulic pump. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">High-speed internal combustion engines usually have a deceleration device to make the hydraulic pump work within the optimal speed range. In the latter, the system in which the entire power of the internal combustion engine is used to drive the hydraulic pump is called a full hydraulic drive system. The full hydraulic drive system usually adopts a variable pump or variable motor volumetric speed control system to meet the requirements of large changes in the speed of mobile machinery. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The maximum speed of the internal combustion engine should meet the maximum flow required by the system and not exceed the maximum allowable speed of the hydraulic pump. If the engine speed is too high, a deceleration device should be installed. The maximum power of the internal combustion engine should be slightly greater than the maximum power required by the hydraulic system. Hydraulic Pump Parameter<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-hydraulic-pump-circuit-design\"><strong>Konstrukcja obwodu pompy hydraulicznej<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-1-closed-system-design\"><strong>Pytanie 1: Projekt systemu zamkni\u0119tego<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A closed hydraulic system that uses a manual servo variable pump to control the commutation of the actuator should avoid self-priming and oil replenishment. As shown in Figure 1-1, in the process of using a manual servo variable pump to control the commutation of the actuator, the variable mechanism of the servo variable pump must pass the zero position (that is, the position when the variable pump has no flow output). The variable mechanism of the pump is set to zero. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">From the variable principle of the servo variable pump, it is known that pressure oil must be available to realize the variable. However, when the variable mechanism is in the zero position, no pressure oil can be generated when the self-priming oil is used. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Note that corresponding measures should be taken to form a closed hydraulic system with a variable pump and a single-rod hydraulic cylinder. In Figure 1-2, the variable pump and the single-rod hydraulic cylinder form a closed hydraulic system. When the piston rod is extended, there will be no problem. When the piston rod is retracted, the hydraulic cylinder discharges more oil than it enters. The amount is much larger. If no measures are taken, the hydraulic cylinder cannot move at this time. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the hydraulic motor is operating as a hydraulic pump, avoid the main pump from being subjected to working pressure difference. Figure 1-3 In a closed system composed of a variable pump and a hydraulic motor, when the variable mechanism of the variable pump is set to zero, the motor operates as a meter under the action of external power. Adjusting the overflow valve can control the motor to operate as a pump. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The working pressure difference also acts on the main pump, but at this time, the variable mechanism of the main pump is set to zero as a stop valve. However, the high pressure cavity of the main pump has to bear high-pressure, and the relevant parts of the high-pressure cavity are equivalent to bear static high pressure, which is very disadvantageous. In addition, when the variable mechanism of the main pump deviates from zero due to vibration and other reasons, the system pressure will suddenly drop and cause an accident. Hydraulic Pump Parameter<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img class=\"wd-lazy-fade\" decoding=\"async\" width=\"1024\" height=\"318\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1-1024x318.png\" alt=\"Rysunek 1-1 Unikaj samozasysania i uzupe\u0142niania paliwa Rysunek 1-2 Zamkni\u0119ty uk\u0142ad hydrauliczny Rysunek 1-3 Unikaj nara\u017cenia pompy g\u0142\u00f3wnej na dzia\u0142anie r\u00f3\u017cnicy ci\u015bnie\u0144\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1-1024x318.png 1024w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1-300x93.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1-768x239.png 768w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1-18x6.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1-600x186.png 600w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1-150x47.png 150w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/1.png 1098w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><br>Rysunek 1-1 Unikaj samozasysania i uzupe\u0142niania paliwa<br>Rysunek 1-2 Zamkni\u0119ty uk\u0142ad hydrauliczny<br>Rysunek 1-3 Unikaj nara\u017cania pompy g\u0142\u00f3wnej na dzia\u0142anie r\u00f3\u017cnicy ci\u015bnie\u0144<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">When designing the pump-motor closed system, pay attention to the situation of heavy objects falling at the moment of driving. As shown in Figure 1-3, the heavy lifting closed system is composed of a hydraulic pump and hydraulic motor. When the brake of the motor is released, the heavy object forms an excess torque to drive the hydraulic motor to rotate, so that the hydraulic motor is in working condition of the hydraulic pump. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With the increase of the falling speed of the weight, once the torque of the pressure oil at the motor outlet is not enough to balance with the load torque of the weight acting on the hydraulic motor, the falling speed of the weight will be out of control, causing a crash accident. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because the pressure built up by the heavy object causes oil compression and oil leakage, which are the main reasons for the sliding of the heavy object at the moment of driving, a one-way valve can be installed in the high-pressure pipeline of the system close to the hydraulic motor to connect the hydraulic motor with other The components are separated, <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">and the pressure signal of the heavy object can also be used to control the variable mechanism of the hydraulic pump so that the outlet pressure of the hydraulic pump automatically tracks the pressure established by the weight at the motor outlet so that the sliding speed of the heavy object can be significantly reduced at the moment of driving. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The sliding distance is greatly reduced, and the working reliability of the hydraulic system is also improved. Hydraulic Pump Parameter<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"766\" height=\"392\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2.png\" alt=\"Rysunek 1-4 Zamkni\u0119ty system podnoszenia ci\u0119\u017ckich przedmiot\u00f3w sk\u0142adaj\u0105cy si\u0119 z pompy hydraulicznej i silnika hydraulicznego\" class=\"wd-lazy-fade wp-image-2778\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2.png 766w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2-300x154.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2-18x9.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2-600x307.png 600w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/2-150x77.png 150w\" sizes=\"(max-width: 766px) 100vw, 766px\" \/><figcaption class=\"wp-element-caption\"><br>Rysunek 1-4 Zamkni\u0119ty system podnoszenia ci\u0119\u017ckich przedmiot\u00f3w sk\u0142adaj\u0105cy si\u0119 z pompy hydraulicznej i silnika hydraulicznego<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The variable pump determines the amount of oil supplement for the closed system of the main pump. In a closed system where the variable pump is the main pump, it is inevitable to supplement the oil. However, only the actual flow rate of the variable pump in the system is used as the basis for determining the replenishment, which sometimes results in insufficient replenishment. If the rated speed of the variable pump is 1500r\/min, and the speed of the variable pump in the system is only 1000r\/min, <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">or the actual maximum flow of the system variable pump is only 90% of the rated flow of the pump, etc., insufficient oil supplement will occur. Hidden dangers. Of course, when determining the replenishment amount of a closed hydraulic system, the leakage caused by pipelines, valves,\u00a0and actuators still needs to be considered. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The oil in the replenishment circuit should not be returned to the oil without cooling. If the oil in the replenishing circuit uses uncooled return oil, the temperature of the system oil will rise, which will adversely affect the system. If the leakage in the components and the system increases, the sealing device rapidly ages and deteriorates, loses the sealing performance, accelerates the oxidation of the oil, causes the oil to deteriorate, and reduces the service life of the oil. Therefore, the oil in the replenishment circuit should not be used. Cooled oil return. Hydraulic Pump Parameter<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-2-hydraulic-pump-circuit-design-taboos\"><strong>Pytanie 2: Tabu dotycz\u0105ce projektowania obwodu pompy hydraulicznej<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The built-in overflow valve of the hydraulic pump is not suitable for system pressure adjustment, but should only be used as a safety valve. A simple, direct-acting relief valve is installed in some types of hydraulic pumps, and the valve has a small diameter. It is generally not suitable for system pressure adjustment, but only as a safety valve. The structure of the relief valve and the safety valve are similar, <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">but the diameters of the two types of valves are different, and the purpose of the use is also different. The relief valve used for system pressure regulation requires a large valve diameter, which is mainly used to stabilize the system pressure, and the flow rate varies. The safety valve is mainly used to protect the system pressure from overloading. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Usually, the diameter is small and the flow rate is small, and the system pressure cannot be returned to normal. Therefore, the built-in relief valve of the hydraulic pump should not be used for system pressure adjustment, but should only be used as a safety valve. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The constant power speed control circuit should not be used alone. In Figure 1-5, the constant power pump and the variable motor form a so-called constant power speed control loop. Generally, the speed control loop is required to have greater speed rigidity. But the speed rigidity of this circuit is proportional to the square of the motor displacement, but when the displacement of the variable motor is reduced, the speed rigidity will drop sharply, and the torque that can be output is also reduced, so there are few such circuits Use alone. Hydraulic Pump Parameter<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"365\" height=\"184\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/3.png\" alt=\"Rysunek 1-5 Obw\u00f3d sterowania pr\u0119dko\u015bci\u0105 o sta\u0142ej mocy pozwala unikn\u0105\u0107 niezale\u017cnego u\u017cytkowania\" class=\"wd-lazy-fade wp-image-2779\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/3.png 365w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/3-300x151.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/3-18x9.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/3-150x76.png 150w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><figcaption class=\"wp-element-caption\"><br>Rysunek 1-5 Obw\u00f3d sterowania pr\u0119dko\u015bci\u0105 o sta\u0142ej mocy pozwala unikn\u0105\u0107 niezale\u017cnego u\u017cytkowania<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Excessive pressure loss in the pipeline causes the output flow of the constant power variable pump to fail to meet the expected requirements. As shown in Figure 1-6, the outlet of the constant power variable pump is connected to the hydraulic cylinder through a one-way valve and a reversing valve, and the return oil of the hydraulic cylinder also needs to flow to the oil tank through the corresponding valve. Because some valve specifications are selected too small, the pressure loss is too large. As a result, the output flow of the pump is much smaller than expected, which fails to meet the requirements of the hydraulic cylinder to move quickly. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When multiple actuators adapt throttling speed regulation, avoid using only one hydraulic pump for oil supply. When there are multiple actuators in the system, each agency cannot always maintain the coordination of flow and pressure requirements. However, the use of a throttling speed control circuit inevitably has overflow loss and throttling loss. At this time, if only one pump is used to supply oil, the pump must be selected based on the highest pressure and flow required by the system, which cannot adapt to the low-pressure small flow and high-pressure large flow conditions, resulting in low efficiency of the system, as shown in Figure 1- 7 shown. Hydraulic Pump Parameter<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1001\" height=\"429\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/4.png\" alt=\"Rysunek 1-6 P\u0119tla sterowania pr\u0119dko\u015bci\u0105 pompy o zmiennej mocy o sta\u0142ej mocy Rysunek 1-7 Sterowanie pr\u0119dko\u015bci\u0105 przepustnicy z wieloma si\u0142ownikami\" class=\"wd-lazy-fade wp-image-2780\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/4.png 1001w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/4-300x129.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/4-768x329.png 768w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/4-18x8.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/4-600x257.png 600w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/4-150x64.png 150w\" sizes=\"(max-width: 1001px) 100vw, 1001px\" \/><figcaption class=\"wp-element-caption\"><br>Rysunek 1-6 P\u0119tla sterowania pr\u0119dko\u015bci\u0105 pompy o zmiennej mocy o sta\u0142ej mocy Rysunek 1-7 Sterowanie pr\u0119dko\u015bci\u0105 przepustnicy z wieloma si\u0142ownikami<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The diameter of the stop valve at the suction port of the hydraulic pump should not be too small. To facilitate maintenance, a shut-off valve is generally installed at the inlet of the hydraulic pump, which will increase the flow resistance of the pump. Therefore, the diameter of the shut-off valve must be large enough to prevent the vacuum of the hydraulic pump from being too high. The shut-off valve should have sufficient pressure resistance. When selecting the shut-off valve on the high-pressure pipeline, in addition to the maximum working pressure of the system, the instantaneous pressure change of the system should also be estimated to prevent damage. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The speed of the hydraulic pump should not be too high. The hydraulic pump has a rated speed, and it is not allowed to rotate too high during use, to avoid problems such as insufficient oil suction, increased wear, and reduced life of the hydraulic pump. Generally, the maximum speed of gear pumps and vane pumps is 2000r\/min, while plunger pumps should work at a speed of 1000r\/min, which should not exceed 1500r\/min. Hydraulic Pump Parameter<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-3-self-priming-problem\"><strong>Pytanie 3: Problem samozasysania<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When used in an open hydraulic circuit, the hydraulic pump needs to have a certain self-priming capacity. The occurrence of cavitation may not only damage the hydraulic pump, but also cause vibration and noise, which will make the control valve and executive components operate poorly, and have a bad influence on the entire hydraulic system. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tabu zapewniaj\u0105ce zdolno\u015b\u0107 samozasysania<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Potwierdzaj\u0105c zdolno\u015b\u0107 samozasysania zastosowanej pompy hydraulicznej nale\u017cy okre\u015bli\u0107 i zaprojektowa\u0107 po\u0142o\u017cenie monta\u017cowe pompy hydraulicznej wzgl\u0119dem poziomu zbiornika oleju na podstawie oblicze\u0144 opor\u00f3w przewodu ssawnego z uwzgl\u0119dnieniem warunk\u00f3w temperatury pracy urz\u0105dzenie hydrauliczne i lepko\u015b\u0107 oleju hydraulicznego. Linia ss\u0105ca. Przy obliczaniu wydajno\u015bci samozasysania pompy hydraulicznej nale\u017cy pozostawi\u0107 wystarczaj\u0105cy margines.<\/li>\n\n\n\n<li>The distance from the center of the hydraulic pump to the oil surface is not more than 500mm, and the suction pressure should be within -125mmHg, otherwise cavitation is prone to occur, causing damage to parts, noise, vibration,\u00a0and other failures. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Zainstalowa\u0107 150-oczkowy filtr ss\u0105cy oleju na przewodzie ss\u0105cym. Niekt\u00f3rzy producenci pomp nurnikowych zastrzegaj\u0105, \u017ce nie wolno montowa\u0107 filtra oleju na przewodzie ss\u0105cym, ale powinno to mie\u0107 surowe wymagania dotycz\u0105ce czysto\u015bci oleju w zbiorniku. Zamontuj filtr oleju na pompie hydraulicznej, ale powinien on mie\u0107 surowe wymagania dotycz\u0105ce czysto\u015bci oleju w zbiorniku oleju. Zamontuj filtr oleju ruroci\u0105gu o dok\u0142adno\u015bci filtrowania 25 mesh po stronie wylotowej pompy hydraulicznej.<\/li>\n\n\n\n<li>Nale\u017cy pami\u0119ta\u0107, \u017ce pr\u0119dko\u015b\u0107 pompy hydraulicznej nie mo\u017ce by\u0107 wi\u0119ksza ni\u017c pr\u0119dko\u015b\u0107 znamionowa.<\/li>\n\n\n\n<li>Nale\u017cy zwr\u00f3ci\u0107 uwag\u0119, aby \u015brednica rury ssawnej by\u0142a nie mniejsza ni\u017c zalecana warto\u015b\u0107 (patrz katalog produkt\u00f3w z wymiarami instalacyjnymi), a rura ssawna to co najwy\u017cej jedno kolanko.<\/li>\n\n\n\n<li>If the oil distribution plate needs to reduce the deflection angle of the swash plate when starting, it cannot guarantee self-priming. If the user needs a small flow, he should use the variable mechanism to change the flow after the hydraulic pump is started at full deflection. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>For hydraulic pumps with poor self-priming, avoid installing filters on their suction pipes. As shown in Figure 1-8(a), if a hydraulic pump with poor self-priming is equipped with a filter at its suction port, as the pressure drop of the filter increases, the minimum suction pressure of the hydraulic pump will not be guaranteed. As a result, the hydraulic pump is insufficient to absorb oil, the volumetric efficiency also drops sharply, and vibration and noise occur until the hydraulic pump is damaged. It should be changed to the structure shown in Figure 1-8 (b). Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"301\" height=\"326\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/5.png\" alt=\"Rysunek 4-9 Pompa hydrauliczna ze s\u0142abym samozasysaniem\" class=\"wd-lazy-fade wp-image-2781\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/5.png 301w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/5-277x300.png 277w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/5-11x12.png 11w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/5-150x162.png 150w\" sizes=\"(max-width: 301px) 100vw, 301px\" \/><figcaption class=\"wp-element-caption\"><br>Rysunek 4-9 Pompa hydrauliczna ze s\u0142abym samozasysaniem<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Problem przep\u0142ywu wstecznego i samozasysania<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>W przypadku pomp o nat\u0119\u017ceniu przep\u0142ywu wi\u0119kszym ni\u017c 160 l\/min zaleca si\u0119 zastosowanie samozasysania z przep\u0142ywem zwrotnym.<\/li>\n\n\n\n<li>\u015arednica rury ssawnej nie powinna by\u0107 mniejsza ni\u017c zalecana, a \u015brednica zaworu odcinaj\u0105cego powinna by\u0107 dwukrotno\u015bci\u0105 \u015brednicy rury ssawnej.<\/li>\n\n\n\n<li>D\u0142ugo\u015b\u0107 rury ss\u0105cej pompy olejowej L &lt;2500mm, kolanka rurowe nie powinny by\u0107 wi\u0119ksze ni\u017c dwa, odleg\u0142o\u015b\u0107 rury ss\u0105cej do \u015bciany zbiornika H1&gt;3D, odleg\u0142o\u015b\u0107 rury ss\u0105cej do dna zbiornika wynosi H\u22653D, a D jest \u015brednic\u0105 rury olejowej.<\/li>\n\n\n\n<li>Gdy najni\u017cszy poziom oleju w zbiorniku oleju jest o 300 mm wy\u017cszy ni\u017c \u015brodek wlotu oleju pompy olejowej, pompa hydrauliczna mo\u017ce rozpocz\u0105\u0107 samozasysanie przy ma\u0142ym k\u0105cie ugi\u0119cia.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Problem samozasysania pompy olejowej do monta\u017cu pionowego<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Odleg\u0142o\u015b\u0107 od kr\u00f3\u0107ca ssawnego pompy olejowej do najni\u017cszego poziomu oleju nie przekracza 500 mm.<\/li>\n\n\n\n<li>Z\u0142\u0105cze wlewu oleju na rurze powrotnej oleju powinno znajdowa\u0107 si\u0119 wy\u017cej ni\u017c linia smarowania \u0142o\u017cyska pompy olejowej (powierzchnia ko\u0144cowa pokrywy ko\u0142nierza ko\u0144ca wa\u0142u).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-4-cooling-problem\"><strong>Pytanie 4: Problem z ch\u0142odzeniem<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-pour-oil-into-the-hydraulic-pump-and-motor-housing-for-cooling-to-avoid-high-pressure-in-the-housing-sometimes-it-is-necessary-to-vent-oil-to-the-casing-of-the-hydraulic-pump-and-motor-to-cool-the-hydraulic-pump-and-motor-this-is-necessary-but-remember-not-to-take-the-pressure-of-the-oil-in-the-casing-too-high-otherwise-it-will-cause-the-hydraulic-pump-and-motor-shaft-seal-at-the-same-time-some-plunger-pumps-will-increase-the-resistance-of-the-plunger-in-the-suction-chamber-to-extend-outward\">Wlej olej do pompy hydraulicznej i obudowy silnika w celu ch\u0142odzenia, aby unikn\u0105\u0107 wysokiego ci\u015bnienia w obudowie. Czasami konieczne jest spuszczenie oleju do obudowy pompy hydraulicznej i silnika w celu sch\u0142odzenia pompy hydraulicznej i silnika. Jest to konieczne, ale pami\u0119taj, aby nie zwi\u0119ksza\u0107 ci\u015bnienia oleju w obudowie, w przeciwnym razie spowoduje to uszczelnienie pompy hydraulicznej i wa\u0142u silnika Jednocze\u015bnie niekt\u00f3re pompy nurnikowe zwi\u0119ksz\u0105 op\u00f3r nurnika na ssaniu komora do wysuni\u0119cia na zewn\u0105trz.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gdy pompa hydrauliczna cz\u0119sto pracuje na zerowej mimo\u015brodowo\u015bci lub ci\u015bnienie robocze uk\u0142adu jest ni\u017csze ni\u017c 8 MPa, przez co wyciek pompy hydraulicznej jest zbyt ma\u0142y i korpus pompy nagrzewa si\u0119, obieg oleju mo\u017ce by\u0107 zmuszony do cyrkulacji i ch\u0142odzenia.<\/p>","protected":false},"excerpt":{"rendered":"<p>Selection of hydraulic pump The hydraulic pump is an energy conversion device, which converts the mechanical energy of the driving<\/p>","protected":false},"author":4,"featured_media":2643,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[927,549,928],"class_list":["post-2632","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hydraulic-press","tag-electric-hydraulic-pump","tag-hydraulic-pump","tag-hydraulic-pump-selection-parameters"],"jetpack_featured_media_url":"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.jpg","_links":{"self":[{"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/posts\/2632","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/comments?post=2632"}],"version-history":[{"count":0,"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/posts\/2632\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/media\/2643"}],"wp:attachment":[{"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/media?parent=2632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/categories?post=2632"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yaiwo.com\/pl\/wp-json\/wp\/v2\/tags?post=2632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}