德國力士樂伺服閥4WS2EM10-5X/30B11ET315K31EV原理
力士樂德國產(chǎn)伺服閥，直接德國原廠訂貨，提供報(bào)關(guān)單，質(zhì)保一年。力士樂rexroth伺服閥本系列產(chǎn)品為我公司主打產(chǎn)品系列。
力士樂伺服閥，是電液轉(zhuǎn)換元件同時(shí)也是功率放大原件。是電液伺服系統(tǒng)控制的核心。
伺服閥，主要由6部分組成，分別是：永磁力矩馬達(dá)、噴嘴、檔板、閥芯、閥套以及控制腔。而它的工作原理就是當(dāng)連通電流的時(shí)候，擋板會向右移動(dòng)，使得其右邊的噴嘴節(jié)能作用變強(qiáng)，自然流量也會隨之減少。與此同時(shí)左邊噴嘴節(jié)流作用會減少，流量會隨之增加。這時(shí)候閥芯它兩端就會失去平衡，使得閥芯會向左移動(dòng)。然后閥芯它的位移量跟馬達(dá)的電流量是形成正比的，而在閥芯上面的液壓力跟彈簧力是剛好平衡的。
力士樂伺服閥由永磁力矩馬達(dá)、噴嘴、檔板、閥芯、閥套和控制腔組成。當(dāng)輸入線圈通入電流時(shí)，檔板向右移動(dòng)，使右邊噴嘴的節(jié)流作用加強(qiáng)，流量減少，右側(cè)背壓上升;同時(shí)使左邊噴嘴節(jié)流作用減小，流量增加，左側(cè)背壓下降。閥芯兩端的作用力失去平衡, 閥芯遂向左移動(dòng)。高壓油從流向，送到負(fù)載。負(fù)載回油通過流過回油口，進(jìn)入油箱。閥芯的位移量與力矩馬達(dá)的輸入電流成正比，作用在閥芯上的液壓力與彈簧力相平衡，因此在平衡狀態(tài)下力矩馬達(dá)的差動(dòng)電流與閥芯的位移成正比。如果輸入的電流反向，則流量也反向。
力士樂伺服閥主要用在電氣液壓伺服系統(tǒng)中作為執(zhí)行元件(見液壓伺服系統(tǒng))。在伺服系統(tǒng)中，液壓執(zhí)行機(jī)構(gòu)同電氣及氣動(dòng)執(zhí)行機(jī)構(gòu)相比，具有快速性好、單位重量輸出功率大、傳動(dòng)平穩(wěn)、抗干擾能力強(qiáng)等特點(diǎn)。另一方面，在伺服系統(tǒng)中傳遞信號和校正特性時(shí)多用電氣元件。因此，現(xiàn)代高性能的伺服系統(tǒng)也都采用電液方式，伺服閥就是這種系統(tǒng)的必需元件。
力士樂部分型號如下：
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