液(ye)壓(ya)(ya)傳(chuan)動是以液(ye)體(ti)(ti)為工作介質，利用液(ye)體(ti)(ti)的(de)(de)壓(ya)(ya)力(li)(li)能來(lai)實(shi)(shi)現(xian)運(yun)動和力(li)(li)的(de)(de)一種(zhong)傳(chuan)動方式。一般而(er)(er)言，能夠實(shi)(shi)現(xian)某種(zhong)特(te)定(ding)功(gong)能的(de)(de)液(ye)壓(ya)(ya)元(yuan)(yuan)(yuan)件(jian)(jian)的(de)(de)組(zu)(zu)合，稱(cheng)為液(ye)壓(ya)(ya)回路，而(er)(er)若干特(te)定(ding)的(de)(de)基本功(gong)能回路連接或復(fu)合而(er)(er)成(cheng)的(de)(de)總體(ti)(ti)則稱(cheng)為直流液(ye)壓(ya)(ya)動力(li)(li)單元(yuan)(yuan)(yuan)。直流液(ye)壓(ya)(ya)動力(li)(li)單元(yuan)(yuan)(yuan)通(tong)常都是由液(ye)壓(ya)(ya)元(yuan)(yuan)(yuan)件(jian)(jian)（動力(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)、輔助元(yuan)(yuan)(yuan)件(jian)(jian)）和工作介質兩大部分組(zu)(zu)成(cheng)。

直(zhi)流液壓動力(li)單元型號規格：