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千斤頂不上壓的故障排查

2018/9/22 14:54:53??????點擊:

    壓力是千斤頂液壓系統的兩個最基本的參數之一,在很大程度上決定了液壓系統工作性能的優劣。調壓故障表現為:當對千斤頂液壓系統進行壓力調節時,①系統壓力一點兒建立不起來,根本無壓力;②壓力雖可調上去一些,但調不到最高;③壓力調不下來,總是高壓等現象。

自查方法:

①查泵是否無流量輸出或輸出流量不夠。如液壓泵旋轉方向不對,可通過液壓泵的相關知識來進行解決。

②查溢流閥等壓力調節閥故障。例如溢流閥閥芯卡死在溢流位置系統總溢流、卸荷閥閥芯卡死在卸荷位置系統總卸荷等,系統壓力上不去。

③查方向控制閥。換向閥的閥芯未換向運動到位造成壓力油腔與回油腔串腔。


④查執行元件。液壓缸活塞與活塞桿連接的鎖緊螺母松脫,活塞從活塞桿上跑出,使液壓缸兩腔互通。

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