The hydraulic power unit has adjusted the system pressure and the opening and closing speed when it leaves the factory. To raise (lower) the system pressure, unscrew the overflow bonnet and adjust the screw clockwise (counterclockwise) with a pressure change of about 1.2Mpa per rotation of 90°. If the switch speed needs to be adjusted fast (slow), adjust the adjusting screw of the throttle valve counterclockwise (clockwise). Pay attention to the direction of oil return throttling adjustment.

Fault analysis of hydraulic power unit

1. The bad action of the components that constitute the loop itself, mutual interference of the system loop, and abnormal action of a single component.

2. In the fault of hydraulic components, the fault rate of hydraulic pump is relatively high, accounting for about 3/10 of the fault rate of hydraulic components, so enough attention should be paid to it.

3, due to the improper selection of working media and poor management caused by the hydraulic power unit system fault is also very much. About 70% ~ 80% of the faults of the hydraulic power unit system are caused by pollutants in the hydraulic oil, and about 90% of the faults caused by impurities in the hydraulic oil. Impurities are very harmful to the hydraulic power unit system. They can aggravate component wear, increase leakage, decrease performance, shorten service life, and even cause component damage and system failure.

4, hydraulic power unit system failure is also some gradual hair, such as equipment disrepair, parts wear, corrosion and seals aging;

5, some are sudden failure, such as components due to foreign bodies suddenly stuck, action failure caused by; Some faults are caused by comprehensive factors, such as component specification selection, configuration unreasonable, due to installation, adjustment and setting improper;

6, some are caused by mechanical, electrical and external factors. All these factors increase the difficulty of fault diagnosis of hydraulic power unit system.

7, due to the system of the action of each hydraulic component is mutual influence, so a fault elimination, often there will be another fault, therefore, in the inspection, analysis, troubleshooting, pay attention to the tightness of the hydraulic power unit system.

In order to maintain the original performance of the bearing in good condition for as long as possible, the hydraulic power unit system must be maintained, repaired, in order to prevent accidents in the future.

1. Ensure the reliability of operation, improve productivity and economy.

2, maintenance to the corresponding mechanical operating conditions of the operating standards, regular.

3. The contents include monitoring the running state, supplementing or replacing lubricant, and periodic disassembly inspection.

4. The hydraulic power unit system, as a maintenance item in operation, has the rotating sound, vibration, temperature, lubricant status and so on of the bearing.