Screw pumps are efficient and stable positive displacement conveying equipment widely used in the chemical, food, and pharmaceutical industries. To ensure long-term stable operation and extended service life, proper use and maintenance are crucial. Here are some practical tips.
1. Pre-Startup Inspection
Before use, thoroughly inspect the pump body and piping to ensure they are free of debris or residue. During initial operation or after a long period of inactivity, manually crank the pump to confirm that the rotor rotates freely and without binding. Also, check the lubricating oil level to ensure it meets the required standards to avoid bearing or gear wear due to insufficient lubrication.
2. Operation Precautions
When starting, it is recommended to open the outlet valve first and then slowly start the motor to prevent sudden pressure surges that could damage the seals. Maintain a stable feed flow during operation to avoid idling or dry running, as these can increase stator rubber wear and even burn out the motor. When pumping high-viscosity or particulate-laden media, appropriately control the flow rate to prevent particle accumulation and blockage.
3. Regular Maintenance
It is recommended to inspect the seals, bearings, and lubricating oil every 500-1000 hours of operation, and replace any aged or contaminated parts promptly. For screw pumps pumping corrosive media, regularly inspect the stator and rotor for wear, and replace the stator rubber sleeve if necessary. During extended periods of inactivity, drain the pump and clean with clean water or a solvent to prevent residual corrosion of the internal structure.
4. Troubleshooting Common Problems
If abnormal pump vibration or increased noise is detected, this could indicate rotor eccentricity or bearing damage, requiring immediate shutdown and inspection. If flow rate decreases, check the filter for blockage or insufficient speed. Additionally, seal leakage is often associated with mechanical seal wear and should be promptly adjusted or replaced.
Proper use and regular maintenance can effectively improve the efficiency and reliability of screw pumps. Following these tips can significantly reduce failure rates and ensure smooth production processes.
