采用液(ye)(ye)(ye)(ye)控(kong)(kong)單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)的閉鎖回(hui)路(lu)(lu)。在油(you)(you)壓(ya)(ya)機(ji)液(ye)(ye)(ye)(ye)壓(ya)(ya)缸(gang)的進(jin)、回(hui)油(you)(you)路(lu)(lu)上串(chuan)接液(ye)(ye)(ye)(ye)控(kong)(kong)單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)A、B.當(dang)兩側電(dian)(dian)磁(ci)鐵斷(duan)電(dian)(dian)，油(you)(you)壓(ya)(ya)機(ji)換向(xiang)(xiang)(xiang)閥(fa)(fa)處于(yu)中間位置時.液(ye)(ye)(ye)(ye)壓(ya)(ya)泵(beng)卸荷，輸(shu)出油(you)(you)液(ye)(ye)(ye)(ye)經換向(xiang)(xiang)(xiang)閥(fa)(fa)囚油(you)(you)箱(xiang)，由于(yu)系(xi)統(tong)無壓(ya)(ya)力，液(ye)(ye)(ye)(ye)控(kong)(kong)單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)A和B反(fan)向(xiang)(xiang)(xiang)截止，油(you)(you)壓(ya)(ya)機(ji)液(ye)(ye)(ye)(ye)壓(ya)(ya)缸(gang)左(zuo)右(you)兩腔(qiang)的油(you)(you)液(ye)(ye)(ye)(ye)均不能流動(dong)(dong)，活塞(sai)(sai)被雙(shuang)向(xiang)(xiang)(xiang)閉鎖。當(dang)左(zuo)側電(dian)(dian)磁(ci)鐵通電(dian)(dian)，油(you)(you)壓(ya)(ya)機(ji)換向(xiang)(xiang)(xiang)閥(fa)(fa)左(zuo)位工(gong)作，壓(ya)(ya)力油(you)(you)經液(ye)(ye)(ye)(ye)控(kong)(kong)單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)A迸人液(ye)(ye)(ye)(ye)壓(ya)(ya)缸(gang)左(zuo)腔(qiang)。同時沿控(kong)(kong)制油(you)(you)路(lu)(lu)進(jin)入液(ye)(ye)(ye)(ye)控(kong)(kong)單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)B的控(kong)(kong)制油(you)(you)口，使其(qi)反(fan)向(xiang)(xiang)(xiang)導通.液(ye)(ye)(ye)(ye)壓(ya)(ya)缸(gang)右(you)腔(qiang)的油(you)(you)液(ye)(ye)(ye)(ye)可經單(dan)(dan)向(xiang)(xiang)(xiang)閥(fa)(fa)B及換向(xiang)(xiang)(xiang)閥(fa)(fa)回(hui)油(you)(you)箱(xiang)，活塞(sai)(sai)向(xiang)(xiang)(xiang)右(you)運(yun)動(dong)(dong).當(dang)右(you)側電(dian)(dian)磁(ci)鐵通電(dian)(dian)時，換向(xiang)(xiang)(xiang)閥(fa)(fa)右(you)位工(gong)作。活塞(sai)(sai)向(xiang)(xiang)(xiang)左(zuo)運(yun)動(dong)(dong)。