Hydraulic station flow is too low or too high reason analysis summary

Hydraulic station flow is too low or too high reason analysis summary

The abnormal flow instability in the hydraulic station refers to three common situations: no flow into the actuator, insufficient flow to the actuator and excessive flow into the actuator. So how do we solve this problem?

First, there is no flow in the hydraulic station

(1) The electromagnet of the reversing valve installed above the hydraulic station is loose, and the coil is short circuit. This can be replaced directly by the reversing valve, or taken to repair.

(2) The hydraulic oil in the hydraulic station is contaminated and the spool is stuck. Replace all hydraulic fluid with clean and uncontaminated hydraulic fluid. At the same time, the stuck valve can only be either replaced or repaired.

(3) M, H type function slide valve is not reversed. Turn them around and readjust them.

Two, the hydraulic station flow is too low

Low flow rate of hydraulic station is a common problem of unsteady flow in hydraulic station. There are many reasons for this.

(1) The pressure of the relief valve or unloading valve controlling the flow of the hydraulic pump in the hydraulic station is adjusted too low. Just turn the pressure up.

(2) The bypass control valve in the hydraulic station is not very tight. Either we need to replace the valve or we need to check the flow control lines at the hydraulic station.

(3) The volume efficiency of the hydraulic pump decreases. This can replace the hydraulic pump and exhaust the air inside the hydraulic pump at the same time.

(4) The internal leakage of hydraulic station is serious. This is mainly the various parts of the hydraulic pump station hydraulic oil pump, hydraulic valve, tubing, motor, oil circuit block, oil tank and so on are not connected tightly, at the same time to replace the seal.

(5) The normal adjustment of the variable pump of the hydraulic station is invalid. Replace the hydraulic oil pump.

(6) The loss along the pipeline of the hydraulic station is too great. This can be changed to a larger oil pipe, increase the pressure of the pump is OK.

Three, the hydraulic station flow is too high

(1) The flow control device of the hydraulic station is adjusted too high. This is the exact opposite of the one above, if it's too high then just turn it down.

(2) The normal adjustment of variable pump in hydraulic station is invalid. Hydraulic station design is wrong, this can only be replaced or taken to repair.

(3) The type and motor speed of the hydraulic oil pump are incorrect. Replace the flow can reach the hydraulic pump and speed can reach the motor.

In summary, when the hydraulic actuator can not work normally, Xiaobian suggests that we find the cause of the fault and eliminate the symptoms by the flow of this working parameter.