挖掘機液壓噴射驅動系統。挖掘機維修左右轉向指示燈工作不正常 當手柄開關撥到左轉或右轉時，挖掘機左右轉向燈不閃爍。請檢查左、右轉向燈與閃光繼電器負載端之間的線束。修理挖掘機若起動復合繼電器輸出正常，則檢查起動復合繼電器輸出端到起動機之間的線束連接是否完好（測量起動機端的起動線是否有電壓）；若以上情況完全正常，可以判斷為起動機不能正常工作。維修挖掘機起動(dong)(dong)復合繼電(dian)(dian)(dian)(dian)器(qi)的(de)中(zhong)點信號端有(you)電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)壓(ya)（檢查中(zhong)點信號端信號的(de)輸入(ru)是否與(yu)電(dian)(dian)(dian)(dian)源有(you)短路現象或起動(dong)(dong)機(ji)中(zhong)點輸出不正(zheng)常(chang)）。

　　本文由挖掘機(ji)維修廠提供分享

液壓(ya)(ya)(ya)噴射驅(qu)(qu)動(dong)系統具(ju)有兩個功能(neng): 為噴油器提供(gong)高壓(ya)(ya)(ya)噴射驅(qu)(qu)動(dong)動(dong)力，通過控制液壓(ya)(ya)(ya)油的(de)驅(qu)(qu)動(dong)壓(ya)(ya)(ya)力來控制各噴油器的(de)噴射壓(ya)(ya)(ya)力。

油(you)(you)(you)泵(beng)(beng)輸出(chu)的(de)(de)(de)(de)油(you)(you)(you)不僅滿足(zu)柴油(you)(you)(you)機潤滑系統(tong)的(de)(de)(de)(de)潤滑要(yao)求，而(er)且滿足(zu)液壓(ya)(ya)噴(pen)射驅動系統(tong)中(zhong)液壓(ya)(ya)泵(beng)(beng)的(de)(de)(de)(de)要(yao)求。套(tao)筒泵(beng)(beng)將油(you)(you)(you)從油(you)(you)(you)底殼中(zhong)吸出(chu)，加壓(ya)(ya)油(you)(you)(you)經過油(you)(you)(you)冷卻器和(he)濾清器后進入主(zhu)油(you)(you)(you)道(dao)。部分機油(you)(you)(you)從主(zhu)油(you)(you)(you)道(dao)中(zhong)分離出(chu)來，進入液壓(ya)(ya)泵(beng)(beng)。柴油(you)(you)(you)機左側有一根鋼管，連接柴油(you)(you)(you)機的(de)(de)(de)(de)主(zhu)油(you)(you)(you)路和(he)液壓(ya)(ya)泵(beng)(beng)的(de)(de)(de)(de)進油(you)(you)(you)口。

　　機油(you)(you)(you)(you)(you)從(cong)液(ye)壓(ya)(ya)(ya)泵(beng)的進(jin)(jin)油(you)(you)(you)(you)(you)口進(jin)(jin)入一個液(ye)壓(ya)(ya)(ya)泵(beng)儲油(you)(you)(you)(you)(you)池(chi)中(zhong)。儲油(you)(you)(you)(you)(you)池(chi)的作用(yong)是(shi)在柴(chai)油(you)(you)(you)(you)(you)機工作啟動建(jian)設(she)期(qi)間向液(ye)壓(ya)(ya)(ya)泵(beng)設(she)計(ji)提供大量(liang)機油(you)(you)(you)(you)(you)，直到柴(chai)油(you)(you)(you)(you)(you)機機油(you)(you)(you)(you)(you)泵(beng)的壓(ya)(ya)(ya)力可以建(jian)立發展起來使(shi)用(yong)為(wei)止(zhi)。液(ye)壓(ya)(ya)(ya)泵(beng)儲油(you)(you)(you)(you)(you)池(chi)同時(shi)我們(men)還為(wei)高壓(ya)(ya)(ya)油(you)(you)(you)(you)(you)道補油(you)(you)(you)(you)(you)。柴(chai)油(you)(you)(you)(you)(you)機熄(xi)火冷(leng)卻后，機油(you)(you)(you)(you)(you)系統(tong)溫(wen)度達到降(jiang)低，體積混(hun)凝土收縮。液(ye)壓(ya)(ya)(ya)泵(beng)單向閥使(shi)液(ye)壓(ya)(ya)(ya)油(you)(you)(you)(you)(you)從(cong)液(ye)壓(ya)(ya)(ya)泵(beng)泵(beng)側儲油(you)(you)(you)(you)(you)池(chi)進(jin)(jin)入機油(you)(you)(you)(you)(you)高壓(ya)(ya)(ya)油(you)(you)(you)(you)(you)道，使(shi)機油(you)(you)(you)(you)(you)高壓(ya)(ya)(ya)油(you)(you)(you)(you)(you)道始(shi)終沒有保持(chi)自己(ji)充滿生活狀(zhuang)態。

來(lai)自(zi)儲油(you)(you)(you)器的(de)(de)油(you)(you)(you)通過液(ye)壓(ya)(ya)(ya)泵加壓(ya)(ya)(ya)，通過出油(you)(you)(you)口(kou)進(jin)入高壓(ya)(ya)(ya)油(you)(you)(you)道的(de)(de)缸蓋。高壓(ya)(ya)(ya)油(you)(you)(you)道與各噴(pen)(pen)油(you)(you)(you)器的(de)(de)驅動液(ye)壓(ya)(ya)(ya)油(you)(you)(you)入口(kou)連(lian)接，使來(lai)自(zi)液(ye)壓(ya)(ya)(ya)泵的(de)(de)高壓(ya)(ya)(ya)液(ye)壓(ya)(ya)(ya)油(you)(you)(you)通過缸蓋進(jin)入各噴(pen)(pen)油(you)(you)(you)器。來(lai)自(zi)每個噴(pen)(pen)油(you)(you)(you)器的(de)(de)液(ye)壓(ya)(ya)(ya)油(you)(you)(you)通過氣缸蓋上的(de)(de)排放孔流入閥(fa)室(shi)并(bing)回到油(you)(you)(you)底殼(ke)。