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液压机压力问题,无压力、系统静态高压、压力不足的故障原因分析

液压机压力问题,无压力、系统静态高压、压力不足的故障原因分析

作者:admin    来源:未知    发布时间:2020-08-26 18:51    浏览量:

液压机无任何动作各油缸不上不下首先看在系统是否有压力可以观察系统压力表,(一般泵站上会有三块压力表BP1系统压力表BP2主缸上腔电接点压力表BP3顶出缸无杆腔压力表)BP1如果没有压力,先观察油泵电机转向,是否吸空,排除油泵自身溢流,系统上单动系统阀,排除插件中间针孔式阻尼孔堵塞,插件卡死,先导溢流阀进去异物,先导电磁阀不工作

P1开泵后居高不下,系统插件卡在闭合状态,先导电磁阀卡在吸合状态,先导电磁阀异常带电,盖板中间阻尼孔堵塞。

BPI压力不足达不到额定压力时一般拆开系统阀看是否有异物,密封圈是否有破损或老化。插件是否变形造成密封不严电磁阀内泄,确认后检查油泵,拆开油泵上面泄油孔看回油是否过多。液压油粘度达不到,或油温过高如果BPI正常而BP2压力异常除检查相应溢流阀外还要排除油缸充液阀。4调试过程中远程调压阀管路上混入空气会出现升压滞后,油泵流量变小会出现升压速度变慢。

 

If there is no pressure in the pump station, observe the steering direction of the oil pump motor, and check whether the oil pump is empty or not, The single acting system valve in the system eliminates that the pinhole damping hole in the middle of the plug-in is blocked, the plug-in is stuck, the pilot relief valve enters foreign matters, and the pilot solenoid valve does not work

P1 remained high after the pump was started, the system plug-in was stuck in the closed state, the pilot solenoid valve was stuck in the on state, the pilot solenoid valve was abnormally charged, and the damping hole in the middle of the cover plate was blocked.

When the BPI pressure is not enough to reach the rated pressure, generally open the system valve to see whether there are foreign matters and whether the sealing ring is damaged or aged. If the plug-in is deformed and the sealing is not tight, check the oil pump after confirmation and disassemble the oil drain hole on the oil pump to see if there is too much oil return. If the viscosity of the hydraulic oil cannot reach or the oil temperature is too high, if the BPI is normal and the pressure of bp2 is abnormal, besides checking the corresponding relief valve, it is also necessary to remove the cylinder filling valve. 4. In the process of commissioning, when air is mixed into the pipeline of remote pressure regulating valve, the pressure rise lag will occur, and the speed of pressure rise will slow down when the flow of oil pump becomes smaller.

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