How to troubleshoot common single screw pump failures?

When using single screw pumps, encountering malfunctions is inevitable. The following are detailed steps for troubleshooting these pump failures, helping you quickly identify the problem.

1. Common Fault: Pressure Fluctuations
Single screw pumps often exhibit pressure fluctuations, which may be caused by the following reasons:

Reason: Excessive clearance between the rotor and stator, leading to internal leakage in the pump body.
Solution: Check if the clearance between the rotor and stator meets the standard; replace worn parts promptly.
2. Common Fault: Seal Leakage
Seal leakage is one of the most common faults in pump bodies, potentially leading to media leakage or air ingress into the pump body.

Reason: Worn mechanical seals or improper seal installation.
Solution: Replace the seals and check if the bearings are functioning correctly.
3. Common Fault: Bearing Overheating
Bearing overheating can cause the pump to stop operating or become damaged.

Reason: Lack of lubricating oil or poor quality lubricating oil.
Solution: Add lubricating oil or replace the lubricating oil.
4. Common Fault: Unstable Flow Rate
Unstable flow rate is a common fault in pump bodies, potentially leading to poor media flow.

Reason: Internal blockage in the pump body or the valve is not fully open.
Solution: Clean out impurities inside the pump body and check if the valve is fully open.