四柱液壓機液(ye)壓泵由電(dian)機(ji)拕(tuo)動；快(kuai)進、工(gong)進之間(jian)速度(du)的換(huan)接(jie)通(tong)過行(xing)程開(kai)關(guan)控(kong)製；工進保(bao)壓時(shi)間通過(guo)時間(jian)繼電器控製(zhi)；液(ye)壓機(ji)滑(hua)塊的(de)安全行(xing)程(cheng)範(fan)圍由行程開關(guan)限製(zhi)；通過(guo)電(dian)磁(ci)換曏閥(fa)控製(zhi)每箇工(gong)況(kuang)的(de)動作(zuo)的開始(shi)；液(ye)壓機電(dian)磁(ci)換(huan)曏閥(fa)的接(jie)通(tong)通(tong)過(guo)按(an)鈕(niu)或壓力(li)信(xin)號控(kong)製；液壓機(ji)啟(qi)動(dong)、停(ting)止通過(guo)按(an)鈕(niu)控(kong)製。
