REXROTH力士樂液壓閥選型手冊

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力士樂液壓閥簡介：
力士樂液壓閥（簡稱液壓閥）在液壓系統(tǒng)中的功用是通過控制調節(jié)液壓系統(tǒng)中油液的流向、壓力和流量,，使執(zhí)行器及其驅動的工作機構獲得所需的運動方向、推力（轉矩）及運動速度（轉速）等,。任何一個液壓系統(tǒng),，不論其如何簡單，都不能缺少液壓閥,；同一工藝目的的液壓機械設備,，通過液壓閥的不同組合使用，可以組成油路結構截然不同的多種液壓系統(tǒng)方案,。因此,，液壓閥是液壓技術中品種與規(guī)格多、應用泛,、的部分（元件）,；一個新設計或正在運轉的液壓系統(tǒng)，能否按照既定要求正?？煽康剡\行,，在很大程度上取決于其中所采用的各種液壓閥的性能優(yōu)劣及參數匹配是否合理 [1]  。
壓力控制閥
按用途分為溢流閥,、減壓閥和順序閥,。①溢流閥：能

力士樂液壓閥
控制液壓系統(tǒng)在達到調定壓力時保持恒定狀態(tài)。用于過載保護的溢流閥稱為安全閥,。當系統(tǒng)發(fā)生故障,，壓力升高到可能造成破壞的限定值時，閥口會打開而溢流，以保證系統(tǒng)的安全,。②減壓閥：能控制分支回路得到比主回路油壓低的穩(wěn)定壓力,。減壓閥按它所控制的壓力功能不同，又可分為定值減壓閥（輸出壓力為恒定值）,、定差減壓閥（輸入與輸出壓力差為定值）和定比減壓閥（輸入與輸出壓力間保持一定的比例）,。③順序閥：能使一個執(zhí)行元件（如液壓缸、液壓馬達等）動作以后,再按順序使其他執(zhí)行元件動作 [2]  ,。

力士樂液壓閥安裝方法：
出油閥是一個單向閥,，在彈簧壓力作用下，閥上部圓錐面與閥座嚴密配合,，其作用是在停供時,，將高壓油管與柱塞上端空腔隔絕，防止高壓油管內的油倒流入噴油泵內,。出油閥的下部呈十字斷面,，既能導向，又能通過柴油,。出油閥的錐面下有一個小的圓柱面,，稱為減壓環(huán)帶，其作用是在供油終了時,，使高壓油管內的油壓迅速下降,，避免噴孔處產生滴油現(xiàn)象。當環(huán)帶落入閥座內時則使上方容積很快增大,，壓力迅速減小,，停噴迅速。力士樂液壓閥工作時,，在噴油泵凸輪軸上的凸輪與柱塞彈簧的作用下,，迫使柱塞作上、下往復運動,，從而完成泵油任務,，泵油過程可分為以下三個階段。進油過程當凸輪的凸起部分轉過去后,，在彈簧力的作用下,，柱塞向下運動，柱塞上部空間（稱為泵油室）產生真空度,，當柱塞上端面把柱塞套上的進油孔打開后,，充滿在油泵上體油道內的柴油經油孔進入泵油室，柱塞運動到下止點,，進油結束,。供油過程當凸輪軸轉到凸輪的凸起部分頂起滾[工業(yè)電器網-cnelc]輪體時,，柱塞彈簧被壓縮，柱塞向上運動,，燃油受壓,，一部分燃油經油孔流回噴油泵上體油腔。當柱塞頂面遮住套筒上進油孔的上緣時,，由于柱塞和套筒的配合間隙很?。?.0015-0.0025mm）使柱塞頂部的泵油室成為一個密封油腔，柱塞繼續(xù)上升,，泵油室內的油壓迅速升高,，泵油壓力出油閥彈簧力+高壓油管剩余壓力時，推開出油閥,，高壓柴油經出油閥進入高壓油管,，通過噴油器噴入燃燒室。REXROTH柱塞泵上供油,，當上行到柱塞上的斜槽（停供邊）與套筒上的回油孔相通時,，泵油室低壓油路便與柱塞頭部的中孔和徑向孔及斜槽溝通，油壓驟然下降,，出油閥在彈簧力的作用下迅速關閉,，停止供油。

力士樂現(xiàn)貨型號：
A10VS0100DR/31R-PPA12N00 
A10VS0100DFR1/31R-PPA12N00 
博世力士樂液壓泵Rexroth的詳細信息
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力士樂液壓閥A10A2-2.0/
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A10VSO100DRＧ/31R-PPA12N00
A10VSO100DRＧ/31R-PPA12N00
力士樂液壓閥A10VSO71DFR
力士樂液壓閥A10VSO28DFR
力士樂液壓閥A10VSO140DFR1
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A10VSO71DFR1/31R-PPA12N00-S1648
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4WRA10W1-60-22/G24K4/ V
A10VSO140DFR1/31R-PPB12NOO
DEH16P-20-204-2WA100AL
DE16P-20-204-2WA100AL