液(ye)(ye)壓(ya)(ya)傳動是(shi)以液(ye)(ye)體為工作(zuo)介質，利用(yong)液(ye)(ye)體的(de)壓(ya)(ya)力能(neng)來實現運(yun)動和(he)力的(de)一種傳動方(fang)式。一般而言(yan)，能(neng)夠實現某種特定(ding)功能(neng)的(de)液(ye)(ye)壓(ya)(ya)元(yuan)(yuan)(yuan)件(jian)(jian)的(de)組合(he)，稱(cheng)為液(ye)(ye)壓(ya)(ya)回路(lu)，而若(ruo)干(gan)特定(ding)的(de)基(ji)本功能(neng)回路(lu)連接或復合(he)而成(cheng)的(de)總體則稱(cheng)為直流液(ye)(ye)壓(ya)(ya)動力單(dan)元(yuan)(yuan)(yuan)。直流液(ye)(ye)壓(ya)(ya)動力單(dan)元(yuan)(yuan)(yuan)通常都是(shi)由液(ye)(ye)壓(ya)(ya)元(yuan)(yuan)(yuan)件(jian)(jian)（動力元(yuan)(yuan)(yuan)件(jian)(jian)、執行元(yuan)(yuan)(yuan)件(jian)(jian)、控(kong)制元(yuan)(yuan)(yuan)件(jian)(jian)、輔助元(yuan)(yuan)(yuan)件(jian)(jian)）和(he)工作(zuo)介質兩大(da)部(bu)分組成(cheng)。

直流液壓動(dong)力單(dan)元(yuan)型(xing)號規格：