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Rotor pump common fault and troubleshooting
Rotor pumps are generally reliable and have a low failure rate under normal operation. However, improper use or extended operation can lead to wear, damage, or unexpected failures. To help users better understand and address common issues, we have compiled a list of typical faults, their causes, and possible solutions.
**Fault Phenomenon:** Rotor pump does not run
**Possible Causes:**
- Motor power is not turned on
- Electrical control box, fuse, circuit breaker, or power supply is damaged
- Motor itself is faulty
- Gearbox or bearing is damaged
**Solutions:**
- Check the electrical system, including the control box, fuses, and circuit breakers. Reset if necessary.
- Replace the motor if it is damaged.
- Repair or replace the gearbox or bearings as needed.
**Fault Phenomenon:** Pump runs but no discharge
**Possible Causes:**
- Motor rotation direction is incorrect
- Gearbox or coupling is damaged
- Inlet or outlet valves are closed
- Pipes are clogged
- Safety valve is not properly set or blocked by foreign material
**Solutions:**
- Adjust the motor direction or use an inverter.
- Repair or replace the gearbox or coupling.
- Open the inlet and outlet valves.
- Clear blockages in the pipeline.
- Clean or adjust the safety valve.
**Fault Phenomenon:** Low flow despite proper operation
**Possible Causes:**
- Speed is too low
- Return valve is partially open
- Safety valve is misadjusted or stuck
- Inlet and outlet valves are not fully open
- Pipeline leaks or filters are clogged
**Solutions:**
- Increase the pump speed.
- Adjust the return valve opening.
- Calibrate or clean the safety valve.
- Ensure all valves are fully open.
- Fix leaks and clean filters.
**Fault Phenomenon:** Excessive noise during operation
**Possible Causes:**
- Gearbox or bearings are damaged
- Rotation speed is too high
- Coupling is misaligned
- Rotor collides with the chamber or cover
- Discharge pressure is too high
**Solutions:**
- Repair or replace the gearbox or bearings.
- Reduce the rotational speed.
- Realign the coupling.
- Inspect and repair rotor, chamber, and cover.
- Lower the discharge pressure.
**Fault Phenomenon:** Overheating, high current, or tripping
**Possible Causes:**
- Material viscosity is too high
- System pressure is too high
- Material temperature is too low
- Condensation occurs in the pump or pipes
**Solutions:**
- Use a motor with higher power if within rated capacity.
- Reduce system pressure or increase pipe diameter.
- Heat the material or use insulated piping.
- Install insulation, soft start, or bypass systems to prevent condensation.
By following these troubleshooting steps, users can maintain optimal performance and extend the life of their rotor pumps. Always refer to the manufacturer’s guidelines for specific maintenance procedures.