液(ye)(ye)壓(ya)(ya)傳動(dong)是以液(ye)(ye)體為工(gong)作(zuo)介質，利用液(ye)(ye)體的(de)壓(ya)(ya)力(li)(li)能(neng)(neng)來實(shi)現運動(dong)和(he)力(li)(li)的(de)一種傳動(dong)方式(shi)。一般而言，能(neng)(neng)夠(gou)實(shi)現某(mou)種特定(ding)(ding)功(gong)能(neng)(neng)的(de)液(ye)(ye)壓(ya)(ya)元(yuan)(yuan)(yuan)件(jian)(jian)的(de)組(zu)合，稱為液(ye)(ye)壓(ya)(ya)回路，而若干(gan)特定(ding)(ding)的(de)基本功(gong)能(neng)(neng)回路連接或復合而成的(de)總體則稱為直流液(ye)(ye)壓(ya)(ya)動(dong)力(li)(li)單元(yuan)(yuan)(yuan)。直流液(ye)(ye)壓(ya)(ya)動(dong)力(li)(li)單元(yuan)(yuan)(yuan)通(tong)常都是由液(ye)(ye)壓(ya)(ya)元(yuan)(yuan)(yuan)件(jian)(jian)（動(dong)力(li)(li)元(yuan)(yuan)(yuan)件(jian)(jian)、執行元(yuan)(yuan)(yuan)件(jian)(jian)、控制元(yuan)(yuan)(yuan)件(jian)(jian)、輔(fu)助(zhu)元(yuan)(yuan)(yuan)件(jian)(jian)）和(he)工(gong)作(zuo)介質兩大部(bu)分組(zu)成。

直流液壓動力單元型號規格：