德国力士乐伺服阀4WS2EM10-5X/30B11ET315K31EV原理
力士乐德国产伺服阀，直接德国原厂订货，提供报关单，质保一年。力士乐rexroth伺服阀本系列产品为我公司主打产品系列。
力士乐伺服阀，是电液转换元件同时也是功率放大原件。是电液伺服系统控制的核心。
伺服阀，主要由6部分组成，分别是：永磁力矩马达、喷嘴、档板、阀芯、阀套以及控制腔。而它的工作原理就是当连通电流的时候，挡板会向右移动，使得其右边的喷嘴节能作用变强，自然流量也会随之减少。与此同时左边喷嘴节流作用会减少，流量会随之增加。这时候阀芯它两端就会失去平衡，使得阀芯会向左移动。然后阀芯它的位移量跟马达的电流量是形成正比的，而在阀芯上面的液压力跟弹簧力是刚好平衡的。
力士乐伺服阀由永磁力矩马达、喷嘴、档板、阀芯、阀套和控制腔组成。当输入线圈通入电流时，档板向右移动，使右边喷嘴的节流作用加强，流量减少，右侧背压上升;同时使左边喷嘴节流作用减小，流量增加，左侧背压下降。阀芯两端的作用力失去平衡, 阀芯遂向左移动。高压油从流向，送到负载。负载回油通过流过回油口，进入油箱。阀芯的位移量与力矩马达的输入电流成正比，作用在阀芯上的液压力与弹簧力相平衡，因此在平衡状态下力矩马达的差动电流与阀芯的位移成正比。如果输入的电流反向，则流量也反向。
力士乐伺服阀主要用在电气液压伺服系统中作为执行元件(见液压伺服系统)。在伺服系统中，液压执行机构同电气及气动执行机构相比，具有快速性好、单位重量输出功率大、传动平稳、抗干扰能力强等特点。另一方面，在伺服系统中传递信号和校正特性时多用电气元件。因此，现代高性能的伺服系统也都采用电液方式，伺服阀就是这种系统的必需元件。
力士乐部分型号如下：
R900584270 4WS2EM10-4X/10B3ET315K8AV-7
R900583336 4WS2EM10-4X/20B2ET315K8EM
R900582609 4WS2EM10-4X/30B2ET315K0DM-60
R900576452 4WSE3EE16-1X/300B9ET315K9EM
R900568584 4WS2EM10A-4X/45B3ET315K8EM
R900567828 4WSE3EE16-1X/300B9-315K9EM
R900565557 4WSE2ED16-2X/100B8T315K9EM
R900560820 4WS2EM10-4X/45B2ET315K8EV
R900560353 4WS2EB10-4X/10B2ET70K8AM
R900534062 4WS2EB10-4X/60B2E70K8DM
R900526719 4WS2EM10-4X/45B2ET315K8EM
R900524418 4WS2EM10-4X/2B2ET315K8DM
R900522193 4WS2EM16-2X/150B12T210K8EM
R900520413 4WS2EM10-4X/10B3ET315K8AM
R900513964 4WSE3EE16-1X/200B8-315K9EM
R900510650 4WS2EM10-4X/20B2T315K8DM
R900508857 4WS2EM10-4X/45B2ET315K8BM
R900506180 4WSE3EE16-1X/200B8-315K9EV
R900505743 4WS2EB10-4X/10B2ET140K8AM
R900501001 4WS2EM10-4X/10B2ET315K8BM-52
R900472884 4WS2EM10-4X/30B3ET315K8AM-10
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R900448827 4WS2EM10-4X/10B2ET315K0DM-53
R900444077 4WS2EM10-4X/30B2ET315K8DV
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R900441328 4WS2EM10-4X/60B1ET315K8AM
R901136727 4WSE2EM6-2X/15B9ET210K17EV
R901132770 4WSE2EM10-5X/90B9-315K31DV
R901127976 4WS2EM10-5X/20B11T210K31DV
R901125423 4WSE3EE16-1X/300B8-315K9DV-122
R901122489 4WSE3EE25-2X/400B8-315K9DV-122
R901120159 4WS2EM10-5X/20B11T315K31CV-102
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R901119296 4WS2EM10-5X/10B11T210K31CV-102
R901119176 4WS2EM10-5X/60B11ET210K31AV
R901119156 4WS2EM10-5X/75B11XHET210K31EV-100
R901117716 4WSE3EE25-2X/400B8-315K9DV
R901116633 4WS2EM10-5X/5B11XHET315K31EV-100
R901114562 4WSE2ED10-5X/10B9T315K31DV
R901114271 4WS2EM10-5X/45B11T315K8CV-104
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R901112369 4WSE3EE16-1X/300B9ET315K9DM-127
R901111502 4WSE3EE25-2X/500B8ET210K9EV-129
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R901110839 4WSE3EE16-1X/300B8-315K9DV
R901108852 4WS2EM10-5X/60B11XHE315K31EV
R901108851 4WS2EM10-5X/75B11XHE315K31EV
R901107316 4WSE3EE16-1X/200B8-315K9EV-118
R901105059 4WSE2ED10-5X/30B13ET315K31EV
R901103913 4WSE2EE10-4X/60B8ET315K9EV-73
R901103896 4WSE2ED10-5X/45B13T210K31EV
R901103115 4WSE2EM6-2X/5B8ET210K17EV
R901102082 4WSE3EE25-2X/500B8ET210K9EV
R901101919 4WS2EM10-5X/20B11XHET315K31EV-100
R901101469 4WS2EM10-5X/75B11T315K8CV-104
R901100588 4WSE2ED10-5X/20B9T210K31EV
R901098531 4WSE3EE16-1X/150B9-210K9EV-118
R901098304 4WS2EM10-5X/10B11XHET315K31EV-100
R901098041 4WS2EM10-5X/30B11ET315K31AV
R901097271 4WS2EM10-4X/60B1T315K8EV
R901097114 4WSE3EE32-4X/500B9-315K9DV
R901096801 BETRIEBSANLEITUNG4WS2EM10-5X/XH-102EU
R901096782 BETRIEBSANLEITUNG 4WS2EM10-5X/XH-100EU
R901096781 4WS2EM10-5X/30B11VH1ET315K31DV-114
R901096114 4WS2EM10-5X/5B11ET315K31DV
R901095313 4WS2EM10-5X/20B11T315K31EV
R901095275 4WSE3EE32-4X/700B9ET315K9EV
R901091476 4WS2EM6-2X/25B11ET315K17EV
R901091443 4WS2EM10-5X/10B11T315K8AV
R901086626 4WS2EM10-5X/90B11XHET315K31EV
R901083564 4WSE2EM6-2X/15B8ET315K17EV
R901082071 4WSE3EE25-2X/400B8T210K9EV
R901081620 4WS2EE10-4X/20B2T70K8DV
R901079357 4WS2EM10-4X/45B2ET315K8EV-10
R901078195 4WS2EM10-4X/30B1ET315K8DV
R901077583 4WS2EM10-5X/20B11ET210K8DV
R901075694 4WS2EM10-5X/30B11T315K31AV
R901072949 4WSE3EE16-1X/300B8T315K9EV
R901070225 4WS2EM10-5X/20B11T315K8EV
