液 压 泵 站 操 作 规 程
Operational Rules for Hydraulic Pump Station
1. 准备Preparations Before Starting the Machines
Check the oil level and oil temperature of the hydraulic oil tank.
Every time before running the machines, open (or confirm that they have been opened) all the ball valves on the oil inlet pipe, the oil return pipe and the leakage pipe at the Hydraulic Pump Station, then turn on the master switch of the electric source.
2. 压力调整Pressure Adjustment
The highest pressure constrained set for the system: Adjust the signal pressure of the pressure relay D8 above the oil tank.
Safety pressure set for the system: Regulate the overflow valve D1 located at the back of the oil tank and near the energy storage.
The pressure set for the control pump B21: Regulate the break-over pressure of the pumpB21 and adjust the solenoid overflow valve on the adjusting pressure valve block of the control pump. The pressure of the solenoid overflow valve is higher 1.5 – 2MPa than that of the pump B21.
The pressure set for the main pumps B41 and B42: Regulate the solenoid overflow valves B11.1 and B11.2 on the adjusting pressure valve block of the main pump.
The pressure for the pump B21, the solenoid overflow valve B11.1 and B11.2 can’t be higher 31.5MPa.
The pressure of the overflow valve D1 should be adjusted higher about 1MPa than that of the pressure relay D8.
The corresponding oil pump should be unloaded before stopping the oil pump motor. After the Hydraulic Pump Station stops working, make sure all the load/unload turnbuttons be on the unload positions.
Turn off the master switch of the electric source.