{"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:\/\/yaiwo.com\/de\/9-questions-hydraulic-pump-parameter-calculation\/","title":{"rendered":"9 Fragen zur Berechnung von Hydraulikpumpenparametern, die Sie kennen sollten"},"content":{"rendered":"<p class=\"yoast-reading-time__wrapper\"><span class=\"yoast-reading-time__icon\"><\/span><span class=\"yoast-reading-time__descriptive-text\">Gesch\u00e4tzte Lesezeit:  <\/span><span class=\"yoast-reading-time__reading-time\">24<\/span><span class=\"yoast-reading-time__time-unit\"> Protokoll<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-selection-of-hydraulic-pump\"><strong>Auswahl der Hydraulikpumpe<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Die <a href=\"https:\/\/www.youtube.com\/watch?v=kP6gNQ700UM\" target=\"_blank\" rel=\"noopener\">hydraulische Pumpe<\/a> ist eine Energieumwandlungsvorrichtung, die die mechanische Energie des Antriebsmotors in die Druckenergie des \u00d6ls umwandelt, um den Bedarf des Aktuators zum Antrieb der externen Last zu decken.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-1-hydraulic-pump-performance\"><strong>Frage 1: Leistung der Hydraulikpumpe<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Die Hauptleistungen der gebr\u00e4uchlichsten Hydraulikpumpen sind in der Tabelle aufgef\u00fchrt.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Leistung<\/td><td class=\"has-text-align-center\" data-align=\"center\">Au\u00dfenzahnradpumpe<\/td><td class=\"has-text-align-center\" data-align=\"center\">Doppeltwirkende Fl\u00fcgelzellenpumpe<\/td><td class=\"has-text-align-center\" data-align=\"center\">Druckbegrenzende Verstellfl\u00fcgelpumpe<\/td><td class=\"has-text-align-center\" data-align=\"center\">Radialkolbenpumpe<\/td><td class=\"has-text-align-center\" data-align=\"center\">Axialkolbenpumpe<\/td><td class=\"has-text-align-center\" data-align=\"center\">Schneckenpumpe<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Ausgangsdruck<\/td><td class=\"has-text-align-center\" data-align=\"center\">Niedriger Druck<\/td><td class=\"has-text-align-center\" data-align=\"center\">Mitteldruck<\/td><td class=\"has-text-align-center\" data-align=\"center\">Mitteldruck<\/td><td class=\"has-text-align-center\" data-align=\"center\">Hoher Druck<\/td><td class=\"has-text-align-center\" data-align=\"center\">Hoher Druck<\/td><td class=\"has-text-align-center\" data-align=\"center\">Niedriger Druck<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Durchflussregulierung<\/td><td class=\"has-text-align-center\" data-align=\"center\">Nein<\/td><td class=\"has-text-align-center\" data-align=\"center\">Nein <\/td><td class=\"has-text-align-center\" data-align=\"center\">Nein<\/td><td class=\"has-text-align-center\" data-align=\"center\">Jawohl<\/td><td class=\"has-text-align-center\" data-align=\"center\">Jawohl<\/td><td class=\"has-text-align-center\" data-align=\"center\">Nein<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Wirksamkeit<\/td><td class=\"has-text-align-center\" data-align=\"center\">Niedrig<\/td><td class=\"has-text-align-center\" data-align=\"center\">H\u00f6her<\/td><td class=\"has-text-align-center\" data-align=\"center\">H\u00f6her<\/td><td class=\"has-text-align-center\" data-align=\"center\">Hoch<\/td><td class=\"has-text-align-center\" data-align=\"center\">Hoch <\/td><td class=\"has-text-align-center\" data-align=\"center\">H\u00f6her<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Ausgangsstrompulsation<\/td><td class=\"has-text-align-center\" data-align=\"center\">Sehr gro\u00df<\/td><td class=\"has-text-align-center\" data-align=\"center\">Die kleinste<\/td><td class=\"has-text-align-center\" data-align=\"center\">Allgemein<\/td><td class=\"has-text-align-center\" data-align=\"center\">Allgemein<\/td><td class=\"has-text-align-center\" data-align=\"center\">Allgemein<\/td><td class=\"has-text-align-center\" data-align=\"center\">Die kleinste<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Selbstansaugende Eigenschaften<\/td><td class=\"has-text-align-center\" data-align=\"center\">Gut <\/td><td class=\"has-text-align-center\" data-align=\"center\">Relativ arm<\/td><td class=\"has-text-align-center\" data-align=\"center\">Relativ arm<\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\">Arm<\/td><td class=\"has-text-align-center\" data-align=\"center\">Gut<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-2-selection-of-hydraulic-pump-type\"><strong>Frage 2: Auswahl des Hydraulikpumpentyps<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"452\" height=\"274\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/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:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2.jpg 452w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-300x182.jpg 300w, https:\/\/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>F\u00fcr allgemeine Werkzeugmaschinenhydrauliksysteme, doppeltwirkender Fl\u00fcgel<a href=\"https:\/\/yaiwo.com\/de\/introduction-of-hydraulic-pump\/\"> Pumps<\/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>Die Parameterberechnung der Hydraulikpumpe<\/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>Frage 1: Berechnen Sie den maximalen Arbeitsdruck der Hydraulikpumpe<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Der maximale Arbeitsdruck P<sub>P<\/sub>&nbsp;der Hydraulikpumpe h\u00e4ngt vom maximalen Arbeitsdruck des Aktuators (Hydraulikzylinder oder Hydromotor) ab, n\u00e4mlich<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">P<sub>P<\/sub>P<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>Frage 2: Berechnen Sie den maximalen Durchfluss der Hydraulikpumpe<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Der maximale Durchfluss q<sub>P<\/sub>\u00a0(m<sup>3<\/sup>\/s) der Haupthydraulikpumpe ist abh\u00e4ngig vom Volumenstrom q<sub>v<\/sub>\u00a0required by the system. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bei einem System, in dem mehrere Hydraulikzylinder oder Hydraulikmotoren gleichzeitig wirken, sollte die maximale F\u00f6rdermenge der Hydraulikpumpe<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Q<sub>P<\/sub>q<sub>v<\/sub>K( \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>Frage 3: Berechnung des kleinen Pumpendurchflusses bei der Berechnung der Doppelpumpen\u00f6lversorgung<\/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>Frage 4: W\u00e4hlen Sie den Nenndruck der zu bestimmenden Hydraulikpumpe<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"400\" height=\"400\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1.jpg\" alt=\"hydraulische Pumpe\" class=\"wd-lazy-fade wp-image-2648\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1.jpg 400w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1-300x300.jpg 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1-150x150.jpg 150w, https:\/\/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>Frage 5: W\u00e4hlen Sie den zu bestimmenden Nenndurchfluss der Hydraulikpumpe<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"404\" height=\"265\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.png\" alt=\"hydraulische Pumpe\" class=\"wd-lazy-fade wp-image-2652\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.png 404w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-300x197.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-18x12.png 18w, https:\/\/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\">Was die F\u00f6rdermenge der Hydraulikpumpe betrifft, so kann bei der Auswahl die vom System ben\u00f6tigte maximale F\u00f6rdermenge ausgew\u00e4hlt werden, die nicht zu gro\u00df sein sollte, um \u00fcberm\u00e4\u00dfige Leistungsverluste zu vermeiden. Nachdem der Aufbau der Hydraulikpumpe erstellt wurde, k\u00f6nnen die Spezifikationen und Modelle der Hydraulikpumpe anhand der entsprechenden technischen Handb\u00fccher oder Produktmuster entsprechend dem maximalen Arbeitsdruck und dem maximalen F\u00f6rderstrom der Hydraulikpumpe ermittelt werden.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bei der tats\u00e4chlichen Auswahl, weil Pumpenverdr\u00e4ngung, Drehzahlbereich und F\u00f6rderstrom bei unterschiedlichen Dr\u00fccken bei typischer Drehzahl normalerweise auf dem Produktmuster angegeben sind. Wenn also der erforderliche Durchfluss q<sub>v<\/sub><img decoding=\"async\" width=\"13\" height=\"20\" src=\"\" alt=\"\" title=\"\"> des Systems bekannt ist, die F\u00f6rdermenge der Pumpe q<sub>P<\/sub> (L\/min), Drehzahl n (U\/min) und Verdr\u00e4ngung V (mL\/U) sind umfassend zu betrachten. Da der Ausgangsfluss <img decoding=\"async\" width=\"13\" height=\"20\" src=\"\" alt=\"\" title=\"\">der Pumpe ist<\/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>Frage 6: Zur Drehzahl und Effizienz der Pumpe<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"301\" height=\"218\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3.png\" alt=\"hydraulische Pumpe\" class=\"wd-lazy-fade wp-image-2655\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3.png 301w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3-18x12.png 18w, https:\/\/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>Der maximale Druck und die maximale Drehzahl der Hydraulikpumpe sollten gleichzeitig genutzt werden, um die Lebensdauer der Hydraulikpumpe zu verl\u00e4ngern. Das Produkthandbuch enth\u00e4lt eine detailliertere \u00dcbersicht \u00fcber die Parameter der Hydraulikpumpe. Bei der Auswahl sollten Sie sich strikt an die Vorschriften im Produkthandbuch halten.<\/li>\n\n\n\n<li>Je h\u00f6her der Druck und je niedriger die Drehzahl, desto geringer ist der volumetrische Wirkungsgrad der Hydraulikpumpe, und der volumetrische Wirkungsgrad der Verstellpumpe nimmt ab, wenn die Verdr\u00e4ngung der Verstellpumpe angepasst wird. Bei konstanter Drehzahl ist der Gesamtwirkungsgrad der Hydraulikpumpe bei einem bestimmten Druck am h\u00f6chsten, und der Gesamtwirkungsgrad der Verstellpumpe ist bei einer bestimmten Verdr\u00e4ngung und einem bestimmten Druck am h\u00f6chsten. Der Gesamtwirkungsgrad der Hydraulikpumpe hat gro\u00dfen Einfluss auf den Wirkungsgrad des Hydrauliksystems. Daher ist es tabu, eine Hydraulikpumpe mit niedrigem Wirkungsgrad zu w\u00e4hlen. Sie sollten eine hocheffiziente Hydraulikpumpe w\u00e4hlen und versuchen, die Hydraulikpumpe in einem effizienten Arbeitsumfeld zu betreiben.<\/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>Frage 7: Berechnen Sie die Antriebsleistung der Hydraulikpumpe<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Wenn Druck und F\u00f6rdermenge der Pumpe w\u00e4hrend des Arbeitszyklus relativ konstant sind (d. h. die pt-Kurve und die qt-Kurve im Betriebszustandsdiagramm \u00e4ndern sich gleichm\u00e4\u00dfiger), dann ist die Antriebsleistung der Hydraulikpumpe 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>Frage 8: Die Wahl des Motors<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"324\" height=\"347\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1.png\" alt=\"hydraulische Pumpe\" class=\"wd-lazy-fade wp-image-2656\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1.png 324w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1-280x300.png 280w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1-11x12.png 11w, https:\/\/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>Bei der Auswahl des Elektromotors der Hydraulikpumpe muss auch der Einflussfaktor der Drehzahl ber\u00fccksichtigt werden. Die Synchrondrehzahl des Elektromotors darf nicht h\u00f6her sein als die Nenndrehzahl der Hydraulikpumpe.<\/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>Frage 9: Die Wahl des Verbrennungsmotors<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"400\" height=\"312\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1.png\" alt=\"hydraulische Pumpe\" class=\"wd-lazy-fade wp-image-2658\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1.png 400w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1-300x234.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1-15x12.png 15w, https:\/\/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\">Die meisten Hydrauliksysteme mobiler Arbeitsmaschinen verwenden Verbrennungsmotoren zum Antrieb von Hydraulikpumpen.<\/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>Design des Hydraulikpumpenkreislaufs<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-1-closed-system-design\"><strong>Frage 1: Geschlossenes Systemdesign<\/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:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-1024x318.png\" alt=\"Abbildung 1-1 Selbstansaugen und Betanken vermeiden Abbildung 1-2 Geschlossenes Hydrauliksystem Abbildung 1-3 Vermeiden Sie, dass die Hauptpumpe einem Druckunterschied ausgesetzt wird\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-1024x318.png 1024w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-300x93.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-768x239.png 768w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-18x6.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-600x186.png 600w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-150x47.png 150w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.png 1098w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><br>Abbildung 1-1 Selbstansaugung und Betankung vermeiden<br>Abbildung 1-2 Geschlossenes Hydrauliksystem<br>Abbildung 1-3 Vermeiden Sie, dass die Hauptpumpe einer Druckdifferenz ausgesetzt wird<\/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:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2.png\" alt=\"Abbildung 1-4 Das geschlossene System f\u00fcr schwere Hebearbeiten, bestehend aus Hydraulikpumpe und Hydraulikmotor\" class=\"wd-lazy-fade wp-image-2778\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2.png 766w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-300x154.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-18x9.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-600x307.png 600w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-150x77.png 150w\" sizes=\"(max-width: 766px) 100vw, 766px\" \/><figcaption class=\"wp-element-caption\"><br>Abbildung 1-4 Das geschlossene System f\u00fcr schwere Hebearbeiten, bestehend aus Hydraulikpumpe und Hydraulikmotor<\/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>Frage 2: Tabus bei der Auslegung von Hydraulikpumpenkreisen<\/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:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3.png\" alt=\"Abbildung 1-5 Der Drehzahlregelkreis mit konstanter Leistung vermeidet eine unabh\u00e4ngige Verwendung\" class=\"wd-lazy-fade wp-image-2779\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3.png 365w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3-300x151.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3-18x9.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3-150x76.png 150w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><figcaption class=\"wp-element-caption\"><br>Abbildung 1-5 Der Drehzahlregelkreis mit konstanter Leistung vermeidet eine unabh\u00e4ngige Verwendung<\/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:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4.png\" alt=\"Abbildung 1-6 Regelkreis f\u00fcr die variable Pumpendrehzahl mit konstanter Leistung Abbildung 1-7 Drosseldrehzahlregelung mit mehreren Stellantrieben\" class=\"wd-lazy-fade wp-image-2780\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4.png 1001w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-300x129.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-768x329.png 768w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-18x8.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-600x257.png 600w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-150x64.png 150w\" sizes=\"(max-width: 1001px) 100vw, 1001px\" \/><figcaption class=\"wp-element-caption\"><br>Abbildung 1-6 Regelkreis f\u00fcr die variable Pumpendrehzahl mit konstanter Leistung Abbildung 1-7 Drosseldrehzahlregelung mit mehreren Stellantrieben<\/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>Frage 3: Selbstansaugendes Problem<\/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>Tabus zur Sicherstellung der Selbstansaugf\u00e4higkeit<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bei der Best\u00e4tigung der Selbstansaugleistung der verwendeten Hydraulikpumpe ist es erforderlich, die Einbaulage der Hydraulikpumpe relativ zum \u00d6ltankniveau anhand der Berechnung des Widerstands der Saugleitung unter Ber\u00fccksichtigung der Betriebstemperaturbedingungen von . zu bestimmen und auszulegen das Hydraulikger\u00e4t und die Viskosit\u00e4t des Hydraulik\u00f6ls. Saugleitung. Bei der Berechnung der Selbstansaugleistung der Hydraulikpumpe sollte ein ausreichender Spielraum belassen werden.<\/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>Installieren Sie einen 150-Mesh-\u00d6lsaugfilter in der Saugleitung. Einige Plungerpumpenhersteller schreiben vor, dass kein \u00d6lfilter in die Saugleitung eingebaut werden darf, dieser sollte jedoch strenge Anforderungen an die Sauberkeit des \u00d6ls im Tank stellen. Installieren Sie den \u00d6lfilter an der Hydraulikpumpe, dies sollte jedoch strenge Anforderungen an die Sauberkeit des \u00d6ls im \u00d6ltank stellen. Installieren Sie einen Rohrleitungs\u00f6lfilter mit einer Filtergenauigkeit von 25 mesh auf der Auslassseite der Hydraulikpumpe.<\/li>\n\n\n\n<li>Beachten Sie, dass die Drehzahl der Hydraulikpumpe nicht h\u00f6her als die Nenndrehzahl sein darf.<\/li>\n\n\n\n<li>Achten Sie darauf, dass der Durchmesser des Saugrohrs nicht kleiner als der empfohlene Wert ist (siehe Produktkatalog der Einbauma\u00dfe) und das Saugrohr h\u00f6chstens ein Winkelst\u00fcck hat.<\/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:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5.png\" alt=\"Abbildung 4-9 Hydraulikpumpe mit schlechter Selbstansaugung\" class=\"wd-lazy-fade wp-image-2781\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5.png 301w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5-277x300.png 277w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5-11x12.png 11w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5-150x162.png 150w\" sizes=\"(max-width: 301px) 100vw, 301px\" \/><figcaption class=\"wp-element-caption\"><br>Abbildung 4-9 Hydraulikpumpe mit schlechter Selbstansaugung<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Das Problem des R\u00fcckflusses und der Selbstansaugung<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bei Pumpen mit einer Durchflussmenge von mehr als 160 l\/min wird empfohlen, selbstansaugend mit R\u00fcckfluss zu arbeiten.<\/li>\n\n\n\n<li>Der Durchmesser der Saugleitung sollte den empfohlenen Wert nicht unterschreiten und der Durchmesser des Absperrventils sollte das Doppelte des Durchmessers der Saugleitung betragen.<\/li>\n\n\n\n<li>Die Saugrohrl\u00e4nge der \u00d6lpumpe betr\u00e4gt L &lt;2500mm, die Rohrkr\u00fcmmer sollten nicht mehr als zwei sein, der Abstand vom Saugrohr zur Tankwand betr\u00e4gt H1&gt;3D, der Abstand vom Saugrohr zum Boden des Tanks H \u2265 3D ist und D der Durchmesser der \u00d6lleitung ist.<\/li>\n\n\n\n<li>Wenn der niedrigste \u00d6lstand des \u00d6ltanks 300 mm h\u00f6her ist als die Mitte des \u00d6leinlasses der \u00d6lpumpe, kann die Hydraulikpumpe bei einem kleinen Umlenkwinkel selbstansaugend beginnen.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Das Problem der Selbstansaugung der \u00d6lpumpe mit vertikaler Installation<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Der Abstand vom Sauganschluss der \u00d6lpumpe bis zum niedrigsten \u00d6lstand betr\u00e4gt nicht mehr als 500 mm.<\/li>\n\n\n\n<li>Der \u00d6leinf\u00fcllstutzen an der \u00d6lr\u00fccklaufleitung sollte h\u00f6her liegen als die Lagerschmierleitung der \u00d6lpumpe (Stirnseite des Wellenendflanschdeckels).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-4-cooling-problem\"><strong>Frage 4: K\u00fchlproblem<\/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\">F\u00fcllen Sie \u00d6l zur K\u00fchlung in das Hydraulikpumpen- und Motorgeh\u00e4use, um einen hohen Druck im Geh\u00e4use zu vermeiden. Manchmal ist es notwendig, \u00d6l in das Geh\u00e4use der Hydraulikpumpe und des Motors zu entl\u00fcften, um die Hydraulikpumpe und den Motor zu k\u00fchlen. Dies ist notwendig, aber denken Sie daran, den Druck des \u00d6ls im Geh\u00e4use nicht zu hoch zu nehmen, da sonst die Hydraulikpumpe und die Motorwelle abgedichtet werden. Gleichzeitig erh\u00f6hen einige Kolbenpumpen den Widerstand des Kolbens in der Ansaugung Kammer nach au\u00dfen zu erweitern.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Wenn die Hydraulikpumpe oft mit Null-Exzentrizit\u00e4t l\u00e4uft oder der Systemarbeitsdruck niedriger als 8 MPa ist, so dass die Leckage der Hydraulikpumpe zu gering ist und sich das Pumpengeh\u00e4use erw\u00e4rmt, kann der \u00d6lkreislauf gezwungen werden, zu zirkulieren und abzuk\u00fchlen.<\/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:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.jpg","_links":{"self":[{"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/posts\/2632","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/comments?post=2632"}],"version-history":[{"count":0,"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/posts\/2632\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/media\/2643"}],"wp:attachment":[{"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/media?parent=2632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/categories?post=2632"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yaiwo.com\/de\/wp-json\/wp\/v2\/tags?post=2632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}