English
中文简体First, oil pump noise vibration
Causes of failure.
1、The oil pump motor is not installed in the center.
2、Loose shaft coupling.
3、Oil pump internal failure.
4、The oil level is too low and air is drawn into the oil from the oil filter or joint connection.
5、Inhale air from the motor to the moving shaft.
6、Oil contamination blocking the oil filter.
7、Loose oil return pipe draws in air or the oil pipe is on the oil surface and air is mixed into the oil.
Exclusion method.
1、Concentricity should be adjusted to within 0.1MM.
2、Amend the shaft coupling.
3、 Repair or replace the oil pump.
4、Increase the oil volume in the oil filtering outline and joint position above 400mm.
5、Replace the rotation shaft seal.
6、Clean the oil strainer and filter the oil.
7、Clean the oil strainer and filter the oil.
8、Lock the oil return line and extend the oil return line to below the oil surface.
Second, motor noise
Causes of failure.
1、The motor bearing is damaged.
2、Motor coil winding failure.
3、Motor wiring error, when the system pressure rises, the noise increases.
Exclusion method.
1、Replace the connecting bearing.
2、Replace or repair the motor.
3、Refer to the wiring diagram for wiring again.
Third, the noise of the total pressure valve (relief valve)
1、The pilot valve of the relief valve has air in the front chamber.
2、The damping hole on the main valve heart of the relief valve is blocked by oil and dirt. 3、The pilot valve and the valve seat are not tightly fitted with strains.
4, Spring deformation or wrong installation.
5、The oil flow at the remote control port is too large.
6、The viscosity of hydraulic oil is too low or too high.
7、 Resonance with components in the circuit.
Exclusion methods.
1, strengthen the seal, repeatedly lift the commissioning pressure several times exhaust.
2、Clean the valve body, so that the damping hole is clear.
3、Repair or replace.
4、Overhaul and replace the spring.
5、Reduce the remote control port flow management.
6、Replace the oil.
7, other components pressure setting can not be similar to the pressure setting of the relief valve.
Four, hydraulic cylinder noise
1, the fluid mixed with air or hydraulic cylinder in the air is not completely exhausted, in the role of high pressure cavitation phenomenon and cause a large noise. At this time, the air must be exhausted in time.
2, cylinder head oil seal is too tight or piston rod bending, in the process of movement will also be due to don't force and generate noise. At this time, shall promptly replace the oil seal or straighten the piston rod.
Five, pipeline noise
Pipeline noise is usually due to hydraulic pipeline dead bend too much or fixed ferrule loose caused by. Therefore, in the hydraulic pipeline department line to try to avoid dead bends, timely check the ferrule loose.
