液(ye)(ye)壓(ya)(ya)(ya)管(guan)系(xi)清潔循環裝置工作時，液(ye)(ye)壓(ya)(ya)(ya)油(you)(you)通(tong)過液(ye)(ye)壓(ya)(ya)(ya)泵輸入到設(she)備(bei)的儲(chu)油(you)(you)箱內。當液(ye)(ye)壓(ya)(ya)(ya)系(xi)統(tong)需要高(gao)壓(ya)(ya)(ya)清洗時，在輸油(you)(you)液(ye)(ye)壓(ya)(ya)(ya)泵的作用下(xia)高(gao)壓(ya)(ya)(ya)泵入液(ye)(ye)壓(ya)(ya)(ya)系(xi)統(tong)，對液(ye)(ye)壓(ya)(ya)(ya)系(xi)統(tong)及管(guan)路進行沖洗，使(shi)管(guan)線和(he)系(xi)統(tong)里的銹斑(ban)和(he)機械(xie)雜質隨油(you)(you)液(ye)(ye)排除。沖洗的污油(you)(you)通(tong)過回程管(guan)路進入精(jing)密過濾(lv)器，濾(lv)掉油(you)(you)液(ye)(ye)里的機械(xie)雜質，然(ran)后送入到設(she)備(bei)的儲(chu)油(you)(you)箱里等待下(xia)一次系(xi)統(tong)清洗。

工作原理圖如下：