Bearing damage of T6C series vane pump

1. The output shaft of the T6C series vane pump is not concentric with the output shaft of the motor during installation (the output shaft of the motor is deformed, the coupling is not concentric, the gap between the positioning of the vane pump is too large, the installation and fixing screws are not tightened, etc.) or they are against each other. , When the vane pump is working, the radial force is too large or it jumps (irregular operation) and damages the bearing and shaft seal. If it is not handled in time, the pump core parts will be damaged and scrapped.

2. The motor bearing has been worn out. This phenomenon cannot be judged when the vane pump has no load. It is normal when it is no-load. When the motor is working, the output of the motor swings due to the gap, which drives the vane pump to work. The system pressure is unstable. As long as there is no abnormal noise in the oil pump, it should be a problem with the total pressure valve (relief valve). Check whether the spool of the total pressure valve is damaged and whether the damping is blocked by foreign objects; If it is placed, there will be abnormal noise when the oil pump is working.

3. The pressure drop of the system means that the vane pump can reach the predetermined pressure when it is working, and the pressure will gradually pick up when it is working, which makes the system unable to work for a long time. If this phenomenon occurs in the newly installed pump, it should be caused by the leakage of the control valve of the system or the oil temperature is too high. The above problem occurs after a period of use, and it is necessary to check whether the oil distribution plate is worn (very flat damage) ), if the gap between the upper and lower oil distribution plates is too large, the oil temperature is too high (the mucous membrane cannot form self-sealing oil), and the leakage of the control valve will cause the system to drop pressure.

4. No pressure means that there is no pressure in the system when the vane pump is working. First, check whether the vane pump has pressure oil discharged. If not, check whether the working direction of the oil pump is correct. The coupling between the motor and the vane pump is connected. Whether it is normal, whether the shaft positioning screw is tightened and works, whether the blade cannot be thrown out due to the high viscosity of the hydraulic oil and cannot work normally; check whether the pump core rotorand blade are burned and cannot be thrown out to work normally, and loosen the outlet pipe joint to see if it is There is hydraulic oil coming out. If there is, it proves that the pump is basically fine. The problem should be that the control valve is seriously leaking, and the total pressure valve (relief valve) is invalid.

5. The reason for the high oil temperature of the system should be that the pipeline of the system is too small, the pressure is too high, the hydraulic oil cannot be discharged in time, and the cooling system does not meet the requirements. High, according to the actual situation, a large series of pipelines, or reduce the displacement of the pump.