*力士樂REXROTH比例伺服閥? 

博士力士樂電液比例閥對簡化工(gong)程機(ji)械操作(zuo)、提高效率和作(zuo)業(ye)(ye)精度以及實現智能化作(zuo)業(ye)(ye)都(dou)有(you)著極其(qi)重要(yao)意義，其(qi)性能進一(yi)步提高和應(ying)用范疇日益拓寬必將使工(gong)程機(ji)械產品(pin)技巧水平(ping)到較大程度提高。

博(bo)士力(li)士樂電(dian)(dian)(dian)液(ye)(ye)比(bi)例(li)閥是(shi)閥內比(bi)例(li)電(dian)(dian)(dian)磁鐵(tie)輸入(ru)電(dian)(dian)(dian)壓(ya)(ya)信號(hao)產(chan)生(sheng)相(xiang)應動作(zuo)，使工作(zuo)閥閥芯產(chan)生(sheng)位(wei)移(yi)，閥口尺寸發(fa)(fa)生(sheng)改(gai)變并以(yi)此完成與輸入(ru)電(dian)(dian)(dian)壓(ya)(ya)成比(bi)例(li)壓(ya)(ya)力(li)、流量輸出(chu)元件。閥芯位(wei)移(yi)也可以(yi)以(yi)機(ji)械、液(ye)(ye)壓(ya)(ya)或電(dian)(dian)(dian)形(xing)(xing)式(shi)進行反饋。電(dian)(dian)(dian)液(ye)(ye)比(bi)例(li)閥具(ju)有(you)形(xing)(xing)式(shi)種(zhong)類多(duo)樣(yang)、容易組成使用電(dian)(dian)(dian)氣及(ji)(ji)計算機(ji)把持各種(zhong)電(dian)(dian)(dian)液(ye)(ye)系統、把持精度(du)高、安裝(zhuang)使用機(ji)動以(yi)及(ji)(ji)抗污(wu)染能力(li)強(qiang)等(deng)多(duo)方面(mian)優點，應用領域日益拓寬。近年研發(fa)(fa)生(sheng)產(chan)插裝(zhuang)式(shi)比(bi)例(li)閥和(he)比(bi)例(li)多(duo)路閥充分考慮到工程機(ji)械使用特點，具(ju)有(you)先(xian)導把持、負載傳感(gan)和(he)壓(ya)(ya)力(li)補償等(deng)功效。它出(chu)現(xian)對移(yi)動式(shi)液(ye)(ye)壓(ya)(ya)機(ji)械整體技巧(qiao)水平提升具(ju)有(you)重要意(yi)義。特別是(shi)電(dian)(dian)(dian)控(kong)(kong)先(xian)導操作(zuo)、無(wu)線遙(yao)(yao)控(kong)(kong)和(he)有(you)線遙(yao)(yao)控(kong)(kong)操作(zuo)等(deng)方面(mian)展現(xian)了其良好應用前(qian)景。

博士(shi)力士(shi)樂電(dian)液(ye)比例(li)閥(fa)(fa)包含(han)比例(li)流量閥(fa)(fa)、比例(li)壓力閥(fa)(fa)、比例(li)換向閥(fa)(fa)。工程機(ji)械(xie)液(ye)壓操作特點，以(yi)結(jie)構形式(shi)劃分電(dian)液(ye)比例(li)閥(fa)(fa)主(zhu)要有兩類(lei)：一類(lei)是(shi)(shi)螺旋(xuan)插(cha)裝式(shi)比例(li)閥(fa)(fa)（screwincartridgeproportionalvalve），另(ling)一類(lei)是(shi)(shi)滑閥(fa)(fa)式(shi)比例(li)閥(fa)(fa)（spoolproportionalvalve）。

博士力士樂螺(luo)旋(xuan)插裝(zhuang)(zhuang)式(shi)比(bi)(bi)例(li)(li)(li)閥(fa)是(shi)螺(luo)紋將(jiang)電磁(ci)比(bi)(bi)例(li)(li)(li)插裝(zhuang)(zhuang)件(jian)(jian)固定(ding)油路(lu)集成(cheng)塊上元件(jian)(jian)，螺(luo)旋(xuan)插裝(zhuang)(zhuang)閥(fa)具有應用(yong)機動(dong)、節省管(guan)路(lu)和成(cheng)本(ben)低(di)廉等特點，近年來工程機械上應用(yong)越來越普遍。常用(yong)螺(luo)旋(xuan)插裝(zhuang)(zhuang)式(shi)比(bi)(bi)例(li)(li)(li)閥(fa)有二(er)通(tong)(tong)(tong)、三通(tong)(tong)(tong)、四(si)通(tong)(tong)(tong)和多通(tong)(tong)(tong)等形式(shi)，二(er)通(tong)(tong)(tong)式(shi)比(bi)(bi)例(li)(li)(li)閥(fa)主比(bi)(bi)例(li)(li)(li)節流(liu)閥(fa)，它常它元件(jian)(jian)一起構成(cheng)復合閥(fa)，對(dui)(dui)(dui)流(liu)量、壓力進(jin)行(xing)把(ba)持；三通(tong)(tong)(tong)式(shi)比(bi)(bi)例(li)(li)(li)閥(fa)主比(bi)(bi)例(li)(li)(li)減壓閥(fa)，也是(shi)移動(dong)式(shi)機械液壓系(xi)統中應用(yong)較多比(bi)(bi)例(li)(li)(li)閥(fa)，它主對(dui)(dui)(dui)液動(dong)操作(zuo)多路(lu)閥(fa)先導(dao)油路(lu)進(jin)行(xing)操作(zuo)。利(li)用(yong)三通(tong)(tong)(tong)式(shi)比(bi)(bi)例(li)(li)(li)減壓閥(fa)可以代替傳統手動(dong)減壓式(shi)先導(dao)閥(fa)，它比(bi)(bi)手動(dong)先導(dao)閥(fa)具有更多機動(dong)性和更高把(ba)持精度。可以制成(cheng)如圖1所示(shi)比(bi)(bi)例(li)(li)(li)伺服把(ba)持手動(dong)多路(lu)閥(fa)，不同輸入信(xin)號，減壓閥(fa)使輸出活塞具有不同壓力或(huo)流(liu)量進(jin)而(er)實現對(dui)(dui)(dui)多路(lu)閥(fa)閥(fa)芯位移進(jin)行(xing)比(bi)(bi)例(li)(li)(li)把(ba)持。四(si)通(tong)(tong)(tong)或(huo)多通(tong)(tong)(tong)螺(luo)旋(xuan)插裝(zhuang)(zhuang)式(shi)比(bi)(bi)例(li)(li)(li)閥(fa)可以對(dui)(dui)(dui)工作(zuo)裝(zhuang)(zhuang)置實現單獨把(ba)持。

博士力士樂滑(hua)閥(fa)(fa)式(shi)比(bi)例閥(fa)(fa)又(you)稱分配(pei)閥(fa)(fa)，是移動式(shi)機(ji)械液(ye)壓系(xi)統zui基礎元件(jian)之(zhi)一，是能實(shi)現方向(xiang)與流量調節復合閥(fa)(fa)。電(dian)液(ye)滑(hua)閥(fa)(fa)式(shi)比(bi)例多路(lu)(lu)閥(fa)(fa)是比(bi)較理想電(dian)液(ye)轉(zhuan)換(huan)把持(chi)元件(jian)，它保(bao)存了(le)手動多路(lu)(lu)閥(fa)(fa)基礎功效，還增加(jia)了(le)地位電(dian)反饋比(bi)例伺服操作和負載傳(chuan)感(gan)等先進把持(chi)手段(duan)。它是工程機(ji)械分配(pei)閥(fa)(fa)更新換(huan)代產品。

出于制造成(cheng)本考慮和工程機(ji)械把持(chi)(chi)精度要求不高(gao)(gao)特點(dian)，一般比例多路閥(fa)(fa)內不配(pei)置位(wei)移(yi)(yi)感應傳感器，具(ju)有(you)電(dian)子檢測和糾錯功(gong)效(xiao)。，閥(fa)(fa)芯位(wei)移(yi)(yi)量容易受負載變(bian)化引起壓力波動(dong)(dong)影響(xiang)(xiang)，操作進程中(zhong)要靠視覺(jue)察看來(lai)保證(zheng)作業完成(cheng)。電(dian)控(kong)、遙控(kong)操作時更(geng)應注意外界(jie)干預(yu)影響(xiang)(xiang)。近來(lai)，電(dian)子技(ji)巧發展，人們越來(lai)越多采用(yong)內裝差動(dong)(dong)變(bian)壓器（ＬＤＶＴ）等位(wei)移(yi)(yi)傳感器構(gou)成(cheng)閥(fa)(fa)芯地位(wei)移(yi)(yi)動(dong)(dong)檢測，實現閥(fa)(fa)芯位(wei)移(yi)(yi)閉(bi)環把持(chi)(chi)。這(zhe)種由電(dian)磁比例閥(fa)(fa)、地位(wei)反饋傳感器、驅動(dong)(dong)放大器和其它電(dian)子電(dian)路組成(cheng)高(gao)(gao)度集(ji)成(cheng)比例閥(fa)(fa)，具(ju)有(you)一定(ding)校正功(gong)效(xiao)，可以有(you)效(xiao)克服(fu)一般比例閥(fa)(fa)缺點(dian)，使把持(chi)(chi)精度到較大提高(gao)(gao)。

  *力士樂REXROTH比例伺服閥? 

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