{"id":14556,"date":"2022-01-20T08:30:47","date_gmt":"2022-01-20T08:30:47","guid":{"rendered":"https:\/\/hqeialdi5a.wpdns.site\/?p=14556"},"modified":"2022-02-07T05:20:47","modified_gmt":"2022-02-07T05:20:47","slug":"3-things-about-pressure-regulating-circuit-you-should-know","status":"publish","type":"post","link":"https:\/\/www.yaiwo.com\/cs\/3-things-about-pressure-regulating-circuit-you-should-know\/","title":{"rendered":"3 v\u011bci o okruhu regulace tlaku, kter\u00e9 byste m\u011bli v\u011bd\u011bt"},"content":{"rendered":"<p class=\"yoast-reading-time__wrapper\"><span class=\"yoast-reading-time__icon\"><\/span><span class=\"yoast-reading-time__descriptive-text\">P\u0159edpokl\u00e1dan\u00e1 doba \u010dten\u00ed:  <\/span><span class=\"yoast-reading-time__reading-time\">9<\/span><span class=\"yoast-reading-time__time-unit\"> minuta<\/span><\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-harsle-forming-division wp-block-embed-harsle-forming-division wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/www.yaiwo.com\/product\/y32-four-colums-hydraulic-press-160t-price\/\n<\/div><\/figure>\n\n\n\n<p>Tlakov\u00e1 regula\u010dn\u00ed smy\u010dka je smy\u010dka, kter\u00e1 pou\u017e\u00edv\u00e1 tlakov\u00fd regula\u010dn\u00ed ventil k \u0159\u00edzen\u00ed celkov\u00e9ho nebo \u010d\u00e1ste\u010dn\u00e9ho tlaku syst\u00e9mu.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Hydraulick\u00fd lis Y32-100T s jednotkou servo\u010derpadla a mobiln\u00edm d\u00e1lkov\u00fdm ovl\u00e1d\u00e1n\u00edm IoT\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/18JSRU71p4w?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>The <a href=\"https:\/\/www.yaiwo.com\/cs\/product\/y32-four-colums-hydraulic-press-160t-price\/\">tlakov\u00fd okruh<\/a> \u0159\u00edzen\u00e9 tlakov\u00fdm ventilem lze pou\u017e\u00edt k realizaci \u0159\u00edzen\u00ed regulace nap\u011bt\u00ed, dekomprese, zv\u00fd\u0161en\u00ed tlaku a v\u00edcestup\u0148ov\u00e9 regulace tlaku pro spln\u011bn\u00ed po\u017eadavk\u016f pohonu z hlediska s\u00edly a to\u010div\u00e9ho momentu. Standardn\u00ed sou\u010d\u00e1sti tlakov\u00e9ho ventilu zahrnuj\u00ed pojistn\u00fd ventil, reduk\u010dn\u00ed ventil, sekven\u010dn\u00ed ventil a jednocestn\u00fd reduk\u010dn\u00ed ventil a jednocestn\u00fd sekven\u010dn\u00ed ventil kombinovan\u00fd s jednocestn\u00fdm ventilem paraleln\u011b.<\/p>\n\n\n\n<p>The <a href=\"https:\/\/www.youtube.com\/watch?v=18JSRU71p4w\" target=\"_blank\" rel=\"noopener\">okruh pro regulaci tlaku <\/a>se vztahuje na pracovn\u00ed tlak \u0159\u00eddic\u00edho syst\u00e9mu, tak\u017ee nep\u0159ekro\u010d\u00ed p\u0159edem nastavenou hodnotu nebo zp\u016fsob\u00ed, \u017ee pracovn\u00ed mechanismus bude m\u00edt v ka\u017ed\u00e9 f\u00e1zi pohybu r\u016fzn\u00e9 tlaky.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-selection-of-voltage-regulation-mode\">1.&nbsp;<strong>V\u00fdb\u011br re\u017eimu regulace nap\u011bt\u00ed<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Obvod pro omezen\u00ed nap\u011bt\u00ed<\/li><\/ul>\n\n\n\n<p>V hydraulick\u00fdch okruz\u00edch je nejlep\u0161\u00ed pou\u017e\u00edt p\u0159epou\u0161t\u011bc\u00ed ventil k omezen\u00ed maxim\u00e1ln\u00edho tlaku. Na obr\u00e1zku je obvod b\u011b\u017en\u00e9ho stroje na zpracov\u00e1n\u00ed tlaku. N\u00edzkotlak\u00fd pojistn\u00fd ventil 1 se pou\u017e\u00edv\u00e1 k tomu, aby p\u00edst nespadl v d\u016fsledku jeho hmotnosti, kdy\u017e p\u00edst v\u00e1lce stoup\u00e1 (nepracuje) a dosahuje koncov\u00e9ho bodu. T\u00edm se \u0161et\u0159\u00ed spot\u0159eba energie a zamezuje se topn\u00e9mu jevu vyl\u00e9v\u00e1n\u00ed oleje z p\u0159epou\u0161t\u011bc\u00edho ventilu.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Tlakov\u00fd okruh d\u00e1lkov\u00e9ho ovl\u00e1d\u00e1n\u00ed<\/li><\/ul>\n\n\n\n<p>Jak je zn\u00e1zorn\u011bno na obr\u00e1zku, kdy\u017e je elektromagnetick\u00fd t\u0159\u00edcestn\u00fd ventil demagnetizov\u00e1n, tlak v okruhu je nastaven\u00fdm tlakem hlavn\u00edho pojistn\u00e9ho ventilu 10MPa; p\u0159i vybuzen\u00ed elektromagnetick\u00e9ho t\u0159\u00edcestn\u00e9ho ventilu. A zm\u011bnou dr\u00e1hy r\u00e1zu hlavn\u00edho ventilu a p\u0159epou\u0161t\u011bc\u00edho ventilu a nebo b pro ovl\u00e1d\u00e1n\u00ed f\u00e1my p\u0159es \u010dty\u0159cestn\u00fd solenoidov\u00fd ventil lze tlak hlavn\u00edho okruhu p\u0159ev\u00e9st na 7MPa nebo 5MPa. Kapacita ka\u017ed\u00e9ho ventilu, krom\u011b hlavn\u00edho ventilu, v\u0161echny pou\u017e\u00edvaj\u00ed mal\u00e9 pr\u016ftokov\u00e9 ventily.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"390\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72472-1024x390.png\" alt=\"Okruh regulace tlaku\" class=\"wd-lazy-fade wp-image-14558\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72472-1024x390.png 1024w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72472-300x114.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72472-768x292.png 768w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72472-18x7.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72472-600x228.png 600w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72472-150x57.png 150w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72472.png 1043w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Sekund\u00e1rn\u00ed okruh regulace tlaku<\/li><\/ul>\n\n\n\n<p>Na obr\u00e1zku, kdy\u017e p\u00edst v\u00e1lce stoup\u00e1 a kles\u00e1 a p\u00edst je udr\u017eov\u00e1n v nejvy\u0161\u0161\u00ed poloze, je tlak v olejov\u00e9m okruhu p,=5MPa (lev\u00e9 vysokotlak\u00e9 \u010derpadlo je nezat\u00ed\u017een\u00e9). Ale kdy\u017e p\u00edst dos\u00e1hne dna, zat\u00ed\u017een\u00ed se zv\u00fd\u0161\u00ed, tlakov\u00e9 rel\u00e9 funguje a elektromagnetick\u00fd t\u0159\u00edcestn\u00fd ventil je ovl\u00e1d\u00e1n tak, aby bylo p1=10MPa, a vysokotlak\u00fd olej vstupuje do okruhu.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"475\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473-1024x475.png\" alt=\"Okruh regulace tlaku\" class=\"wd-lazy-fade wp-image-14559\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473-1024x475.png 1024w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473-300x139.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473-768x356.png 768w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473-18x8.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473-1200x557.png 1200w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473-600x278.png 600w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473-150x70.png 150w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72473.png 1218w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>Okruh regulace tlaku \u010derpadla sm\u011bsi<\/li><\/ul>\n\n\n\n<p>P\u0159i n\u00e1vrhu mus\u00ed b\u00fdt kapacita \u010derpadla p\u0159izp\u016fsobena po\u017eadavk\u016fm pr\u00e1ce a sn\u00ed\u017eit tvorbu zbyte\u010dn\u00e9ho tepla p\u0159i provozu v n\u00edzk\u00fdch ot\u00e1\u010dk\u00e1ch. Okruh je elektricky \u0159\u00edzen a m\u016f\u017ee pracovat s r\u016fzn\u00fdmi pr\u016ftoky a tlaky oleje podle pot\u0159eby pro udr\u017een\u00ed maxim\u00e1ln\u00ed \u00fa\u010dinnosti okruhu s v\u00fdhodami tlakov\u011b kompenzovan\u00e9ho variabiln\u00edho \u010derpadla. Ovl\u00e1dac\u00ed olejov\u00fd okruh elektrohydraulick\u00e9ho zp\u011btn\u00e9ho ventilu v okruhu je vyveden z portu d\u00e1lkov\u00e9ho ovl\u00e1d\u00e1n\u00ed pojistn\u00e9ho ventilu, co\u017e zabra\u0148uje n\u00e1razu zp\u016fsoben\u00e9mu sepnut\u00edm hlavn\u00edho zp\u011btn\u00e9ho ventilu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"2-adjustment-of-pressure-parameters\">2.&nbsp;<strong>\u00daprava parametr\u016f tlaku<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Nastaven\u00fd tlak pojistn\u00e9ho ventilu je nespr\u00e1vn\u00fd<\/li><\/ul>\n\n\n\n<p>Nespr\u00e1vn\u011b nastaven\u00fd tlak pojistn\u00e9ho ventilu zp\u016fsobuje, \u017ee rychlost pohybu hydraulick\u00e9ho v\u00e1lce nespl\u0148uje po\u017eadavky. Okruh postavy vy\u017eaduje plynul\u00fd pohyb p\u0159i zved\u00e1n\u00ed a spou\u0161t\u011bn\u00ed, velk\u00fd rozsah nastaven\u00ed rychlosti a p\u00edst se m\u016f\u017ee zastavit v jak\u00e9koli poloze. Za provozu se v\u0161ak p\u0159i nastavov\u00e1n\u00ed vzestupn\u00e9 rychlosti v\u00fdtahu rychlost v \u0161irok\u00e9m rozsahu nem\u011bn\u00ed. Pouze p\u0159i nastaven\u00ed otvoru \u0161krtic\u00ed klapky na velmi malou velikost se vzestupn\u00e1 rychlost zm\u011bn\u00ed, co\u017e nem\u016f\u017ee splnit n\u00e1le\u017eit\u00e9 po\u017eadavky na v\u00fdkon. Je to proto, \u017ee se zv\u00fd\u0161\u00ed tlak pojistn\u00e9ho ventilu. Nastaven\u00fd tlak pojistn\u00e9ho ventilu by m\u011bl b\u00fdt sou\u010dtem pracovn\u00edho tlaku hydraulick\u00e9ho \u010derpadla p\u0159esn\u011b rovn\u00fd z\u00e1t\u011b\u017eov\u00e9mu tlaku hydraulick\u00e9ho v\u00e1lce a tlakov\u00e9 ztr\u00e1t\u011b pot\u0159ebn\u00e9 p\u0159i pr\u016fchodu pln\u00e9ho pr\u016ftoku \u010derpadla \u0161krtic\u00ed klapkou.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Nespr\u00e1vn\u00e9 parametry nastaven\u00ed tlaku<\/li><\/ul>\n\n\n\n<p>Nespr\u00e1vn\u00e9 parametry nastaven\u00ed tlaku zp\u016fsobuj\u00ed, \u017ee teplota oleje syst\u00e9mu dod\u00e1vky oleje \u010derpadla s konstantn\u00edm tlakem je p\u0159\u00edli\u0161 vysok\u00e1. V hydraulick\u00e9m okruhu \u010derpadla s konstantn\u00edm tlakem zn\u00e1zorn\u011bn\u00e9m na obr\u00e1zku je kv\u016fli nespr\u00e1vn\u00fdm parametr\u016fm nastaven\u00ed tlaku teplota oleje za chodu syst\u00e9mu p\u0159\u00edli\u0161 vysok\u00e1. D\u016fvodem v\u00fd\u0161e uveden\u00e9ho probl\u00e9mu je, \u017ee syst\u00e9mov\u00fd tlak P nastaven\u00fd tlakov\u00fdm ventilem 1 je ni\u017e\u0161\u00ed ne\u017e tlak Pt nastaven\u00fd tlakovou regula\u010dn\u00ed pru\u017einou ventilu 2, tak\u017ee tlak je pou\u017eit jako T a ventil je pou\u017eit pod hv\u011bzdou \u0159ady . Tlak P p\u0159et\u00e9k\u00e1 zp\u011bt do palivov\u00e9 n\u00e1dr\u017ee a v\u0161e se p\u0159em\u011b\u0148uje na teplo, kter\u00e9 zvy\u0161uje teplotu syst\u00e9mu. Proto je ventil 1 pou\u017eit jako pojistn\u00fd ventil a jeho tlak je nastaven o 0,5-1 MPa vy\u0161\u0161\u00ed, ne\u017e je maxim\u00e1ln\u00ed tlak po\u017eadovan\u00fd syst\u00e9mem. V\u00fd\u0161e uveden\u00e9 probl\u00e9my jsou vy\u0159e\u0161eny. lze vy\u0159e\u0161it.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"423\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72474-1024x423.png\" alt=\"Okruh regulace tlaku\" class=\"wd-lazy-fade wp-image-14560\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72474-1024x423.png 1024w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72474-300x124.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72474-768x317.png 768w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72474-18x7.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72474-600x248.png 600w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72474-150x62.png 150w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72474.png 1046w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>P\u0159\u00edklady selh\u00e1n\u00ed nastaven\u00ed parametru tlaku<\/li><\/ul>\n\n\n\n<p>V okruhu regulace tlaku kvantitativn\u00edho \u010derpadla, jak je zn\u00e1zorn\u011bno na obr\u00e1zku, je hydraulick\u00e9 \u010derpadlo kvantitativn\u00ed a neutr\u00e1ln\u00ed funkce t\u0159\u00edpolohov\u00e9ho \u010dty\u0159cestn\u00e9ho p\u0159ep\u00ednac\u00edho ventilu je typu Y. Proto, kdy\u017e hydraulick\u00fd v\u00e1lec p\u0159estane b\u011b\u017eet, syst\u00e9m se nezat\u00ed\u017e\u00ed a tlakov\u00fd olej vystupuj\u00edc\u00ed z hydraulick\u00e9ho \u010derpadla p\u0159ete\u010de p\u0159epou\u0161t\u011bc\u00edm ventilem do olejov\u00e9 n\u00e1dr\u017ee. Pojistn\u00fd ventil v syst\u00e9mu je pilotn\u011b ovl\u00e1dan\u00fd pojistn\u00fd ventil typu YF a struktura tohoto pojistn\u00e9ho ventilu je t\u0159\u00edstup\u0148ov\u00e9ho soust\u0159edn\u00e9ho typu.<\/p>\n\n\n\n<p>Vyskytl se probl\u00e9m: kdy\u017e je zp\u011btn\u00fd ventil v syst\u00e9mu um\u00edst\u011bn do neutr\u00e1ln\u00ed polohy a tlak pojistn\u00e9ho ventilu je nastaven, bylo zji\u0161t\u011bno, \u017ee kdy\u017e je hodnota tlaku ni\u017e\u0161\u00ed ne\u017e 10 MPa, pojistn\u00fd ventil funguje norm\u00e1ln\u011b; kdy\u017e je tlak nastaven na jakoukoli hodnotu tlaku vy\u0161\u0161\u00ed ne\u017e 10 MPa, syst\u00e9m vyd\u00e1v\u00e1 sk\u0159\u00edpav\u00fd zvuk jako fl\u00e9tna a v tomto okam\u017eiku ru\u010di\u010dka manometru prudce vibruje. Po testov\u00e1n\u00ed bylo zji\u0161t\u011bno, \u017ee hluk poch\u00e1z\u00ed z p\u0159epou\u0161t\u011bc\u00edho ventilu.<\/p>\n\n\n\n<p>Anal\u00fdza probl\u00e9mu: U t\u0159\u00edstup\u0148ov\u00e9ho koaxi\u00e1ln\u00edho vysokotlak\u00e9ho pojistn\u00e9ho ventilu m\u00e1 j\u00e1dro hlavn\u00edho ventilu dv\u011b kluzn\u00e1 ulo\u017een\u00ed s t\u011blem ventilu a krytem ventilu. Pokud souosost vnit\u0159n\u00edho otvoru po sestaven\u00ed t\u011blesa ventilu a krytu ventilu p\u0159ekro\u010d\u00ed konstruk\u010dn\u00ed po\u017eadavky, j\u00e1dro hlavn\u00edho ventilu se nem\u016f\u017ee pru\u017en\u011b pohybovat, ale p\u0159ilep\u00ed se na jednu stranu vnit\u0159n\u00edho otvoru, aby prov\u00e1d\u011blo abnorm\u00e1ln\u00ed pohyby. Kdy\u017e je tlak nastaven na ur\u010ditou hodnotu, hlavn\u00ed c\u00edvka bude nevyhnuteln\u011b vibrovat. Tento druh vibrac\u00ed nen\u00ed norm\u00e1ln\u00ed vibrac\u00ed hlavn\u00ed c\u00edvky b\u011bhem pracovn\u00edho pohybu, ale vysokofrekven\u010dn\u00ed vibrac\u00ed zp\u016fsobenou hlavn\u00ed c\u00edvkou zaseknutou v ur\u010dit\u00e9 poloze (v tomto okam\u017eiku je hlavn\u00ed c\u00edvka sou\u010dasn\u011b vystavena hydraulick\u00e9 up\u00ednac\u00ed s\u00edle) . Tyto vysokofrekven\u010dn\u00ed vibrace nevyhnuteln\u011b zp\u016fsob\u00ed siln\u00e9 vibrace pru\u017einy, zejm\u00e9na pru\u017einy reguluj\u00edc\u00ed tlak, a zp\u016fsob\u00ed rezonanci hluku.<\/p>\n\n\n\n<p>Krom\u011b toho, proto\u017ee vysokotlak\u00fd olej nep\u0159et\u00e9k\u00e1 norm\u00e1ln\u00edm p\u0159epadov\u00fdm otvorem, ale p\u0159et\u00e9k\u00e1 zp\u011bt do palivov\u00e9 n\u00e1dr\u017ee zaseknut\u00fdm p\u0159epadov\u00fdm otvorem a vnit\u0159n\u00edm vypou\u0161t\u011bc\u00edm kan\u00e1lem, bude tento vysokotlak\u00fd proud oleje vyd\u00e1vat vysokofrekven\u010dn\u00ed hluk kapaliny. Tyto vibrace a hluk jsou vybuzeny za specifick\u00fdch provozn\u00edch podm\u00ednek syst\u00e9mu, proto se p\u0159i tlaku ni\u017e\u0161\u00edm ne\u017e 10 MPa neoz\u00fdv\u00e1 \u017e\u00e1dn\u00fd sk\u0159\u00edpav\u00fd zvuk.<\/p>\n\n\n\n<p>\u0158e\u0161en\u00ed: V\u00fdrobn\u00ed p\u0159esnost pojistn\u00e9ho ventilu typu YF je pom\u011brn\u011b vysok\u00e1. Souosost vnit\u0159n\u00edch a vn\u011bj\u0161\u00edch kruhov\u00fdch ploch spojovac\u00ed \u010d\u00e1sti v\u00edka a t\u011bla ventilu a souosost vn\u011bj\u0161\u00edch kruhov\u00fdch ploch t\u0159\u00ed osazen\u00ed hlavn\u00edho j\u00e1dra ventilu by m\u011bla b\u00fdt ve stanoven\u00e9m rozsahu. Krom\u011b toho m\u00e1 tlumic\u00ed otvor na hlavn\u00ed c\u00edvce tlum\u00edc\u00ed \u00fa\u010dinek p\u0159i vibrac\u00edch hlavn\u00ed c\u00edvky. Kdy\u017e je viskozita pracovn\u00edho oleje n\u00edzk\u00e1 nebo teplota p\u0159\u00edli\u0161 vysok\u00e1, tlumic\u00ed \u00fa\u010dinek se odpov\u00eddaj\u00edc\u00edm zp\u016fsobem sn\u00ed\u017e\u00ed. Vysokoteplotn\u00ed n\u00e1r\u016fst syst\u00e9mu rovn\u011b\u017e p\u0159isp\u00edv\u00e1 ke sn\u00ed\u017een\u00ed vibrac\u00ed a hluku.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Probl\u00e9m selh\u00e1n\u00ed nastaven\u00ed parametru tlaku<\/li><\/ul>\n\n\n\n<ol class=\"wp-block-list\"><li>Tlak nelze upravit. Hlavn\u00edm d\u016fvodem je, \u017ee tlakov\u00e1 regula\u010dn\u00ed pru\u017eina pojistn\u00e9ho ventilu je p\u0159\u00edli\u0161 m\u011bkk\u00e1, nespr\u00e1vn\u011b nainstalovan\u00e1 nebo chyb\u00ed; tlumic\u00ed otvor hlavn\u00edho ventilu pojistn\u00e9ho ventilu pilotn\u00edho ventilu je zablokov\u00e1n a \u0161oup\u00e1tko p\u0159ekon\u00e1v\u00e1 hydraulick\u00fd tlak horn\u00ed komory a pru\u017einy hlavn\u00edho ventilu p\u016fsoben\u00edm tlaku oleje na spodn\u00edm konci. Proto hlavn\u00ed ventil otev\u0159e p\u0159epadov\u00fd port pod ni\u017e\u0161\u00edm tlakem k p\u0159ete\u010den\u00ed; j\u00e1dro ventilu a sedlo ventilu nejsou t\u011bsn\u011b uzav\u0159eny a \u00fanik je v\u00e1\u017en\u00fd; j\u00e1dro ventilu je ot\u0159epy nebo jin\u00e9 ne\u010distoty uv\u00edzl\u00e9 v otev\u0159en\u00e9 poloze.<\/li><li>Tlak je p\u0159\u00edli\u0161 vysok\u00fd a nelze jej sn\u00ed\u017eit. Hlavn\u00edm d\u016fvodem je, \u017ee c\u00edvka je zaseknut\u00e1 v uzav\u0159en\u00e9 poloze ot\u0159epy nebo ne\u010distotami a hlavn\u00ed ventil nelze otev\u0159\u00edt; b\u011bhem instalace jsou vstup a v\u00fdstup oleje z ventilu nespr\u00e1vn\u011b p\u0159ipojeny a nen\u00ed zde \u017e\u00e1dn\u00fd tlakov\u00fd olej, kter\u00fd by tla\u010dil c\u00edvku do pohybu, tak\u017ee c\u00edvku nelze otev\u0159\u00edt; \u0159\u00eddic\u00ed ventil P\u0159edn\u00ed otvor je zablokov\u00e1n, tak\u017ee hlavn\u00ed ventil nelze otev\u0159\u00edt.<\/li><li>Kol\u00eds\u00e1n\u00ed tlaku je velk\u00e9. Hlavn\u00edm d\u016fvodem je, \u017ee se olej m\u00eds\u00ed se vzduchem; j\u00e1dro ventilu a sedlo ventilu jsou ve \u0161patn\u00e9m kontaktu; pr\u016fm\u011br tlum\u00edc\u00edho otvoru je p\u0159\u00edli\u0161 velk\u00fd, tlumic\u00ed \u00fa\u010dinek je slab\u00fd; doch\u00e1z\u00ed k rezonanci; j\u00e1dro ventilu nen\u00ed v t\u011ble ventilu pru\u017en\u00e9. <\/li><li>Pro v\u00fd\u0161e uveden\u00e9 probl\u00e9my je mo\u017en\u00e9 jej zlep\u0161it z hlediska n\u00e1vrhu obvodu, v\u00fdb\u011bru komponent, parametr\u016f komponent a nastaven\u00ed syst\u00e9mu, instalace potrub\u00ed a pou\u017eit\u00ed hydraulick\u00e9ho oleje.<\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"3-problems-in-the-secondary-pressure-regulating-circuit\">3.&nbsp;<strong>Probl\u00e9my v sekund\u00e1rn\u00edm okruhu regulace tlaku<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>Probl\u00e9m tlakov\u00e9ho r\u00e1zu<\/li><\/ul>\n\n\n\n<p>Ve druh\u00e9m okruhu regulace tlaku zn\u00e1zorn\u011bn\u00e9m na obr\u00e1zku, kdy\u017e 1DT nen\u00ed pod nap\u011bt\u00edm, je tlak v syst\u00e9mu regulov\u00e1n pojistn\u00fdm ventilem 2; kdy\u017e je 1DT pod nap\u011bt\u00edm, tlak v syst\u00e9mu je regulov\u00e1n pojistn\u00fdm ventilem 3 a tlak tohoto okruhu je sp\u00edn\u00e1n Ventilem 4. Kdy\u017e je tlak p\u0159epnut z p1 na p2, proto\u017ee v oleji nen\u00ed \u017e\u00e1dn\u00fd tlak obvod mezi ventilem 4 a ventilem 3 p\u0159ed p\u0159epnut\u00edm, kdy\u017e je p\u0159epnut ventil 4 (1DT je pod nap\u011bt\u00edm), pojistn\u00fd ventil 2 na portu d\u00e1lkov\u00e9ho ovl\u00e1d\u00e1n\u00ed Kdy\u017e okam\u017eit\u00fd tlak klesne z p t\u00e9m\u011b\u0159 na nulu a pot\u00e9 stoupne zp\u011bt nahoru, syst\u00e9m p\u0159irozen\u011b produkuje velk\u00fd tlakov\u00fd r\u00e1z.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"1024\" height=\"341\" src=\"https:\/\/www.yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475-1024x341.png\" alt=\"Okruh regulace tlaku\" class=\"wd-lazy-fade wp-image-14561\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475-1024x341.png 1024w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475-300x100.png 300w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475-768x256.png 768w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475-18x6.png 18w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475-1200x399.png 1200w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475-600x200.png 600w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475-150x50.png 150w, https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u56fe\u72475.png 1211w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption><br>1\u2014Hydraulick\u00e9 \u010derpadlo; 2,3 \u2014 Pojistn\u00fd ventil; <br>4\u2014Dvoupolohov\u00fd dvoucestn\u00fd solenoidov\u00fd ventil1\u2014Hydraulick\u00e9 \u010derpadlo; 2\u2014Pilotn\u00ed pojistn\u00fd ventil; 3\u2014Reverzn\u00ed ventil; 4\u2014Dvoupolohov\u00fd dvoucestn\u00fd solenoidov\u00fd ventil; 5\u2014Zp\u011btn\u00fd ventil<\/figcaption><\/figure><\/div>","protected":false},"excerpt":{"rendered":"<p>A pressure control loop is a loop that uses a pressure control valve to control the overall or partial pressure<\/p>","protected":false},"author":4,"featured_media":14562,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1133,1131,1132],"class_list":["post-14556","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hydraulic-press","tag-pressure-control-valves","tag-pressure-regulating-circuit","tag-pressure-regulator"],"jetpack_featured_media_url":"https:\/\/www.yaiwo.com\/wp-content\/uploads\/2022\/01\/\u672a\u547d\u540d\u7684\u8bbe\u8ba1.jpg","_links":{"self":[{"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/posts\/14556","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/comments?post=14556"}],"version-history":[{"count":0,"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/posts\/14556\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/media\/14562"}],"wp:attachment":[{"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/media?parent=14556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/categories?post=14556"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yaiwo.com\/cs\/wp-json\/wp\/v2\/tags?post=14556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}