Bonve rotary lobe pumps are widely used in industries for their efficiency and reliability in handling viscous fluids.
However, like any mechanical equipment, they may encounter operational issues over time.
This blog outlines common problems, their root causes, and practical solutions to keep your pump running smoothly.
1. Pump Fails to Start or Rotate
Possible Causes:
1). Power supply issues: Tripped circuit breakers, blown fuses, or disconnected wiring.
2
). Motor failure: Burnt motor windings or damaged bearings.
3
). Mechanical jams: Rotor blockage due to debris or solidified media.
Solutions:
1
). Check electrical connections, reset breakers, and replace fuses.
2
). Test the motor for faults and replace damaged components.
3
). Clean the rotor chamber and ensure no foreign particles are obstructing movement.
2. Low Flow Rate or Pressure
Possible Causes:
1). Incorrect rotation direction: Motor wiring reversed, causing reverse flow.
2). Clogged pipelines or valves: Blockages in inlet/outlet pipes or partially closed valves.
3). Worn rotors or chambers: Erosion from abrasive media reduces pumping efficiency.
4
). High fluid viscosity: Exceeds the pump’s design capacity, slowing flow.
Solutions:
1
). Verify motor rotation aligns with directional markings and adjust wiring if needed.
2). Clean filters, open valves fully, and clear pipeline obstructions.
3
). Replace worn rotors or liners and select a pump suited for higher viscosities.
3. Excessive Noise or Vibration
Possible Causes:
1). Bearing wear: Lack of lubrication or contamination causes friction.
2). Misaligned couplings: Poor alignment between the pump and motor shafts.
3). Cavitation: Air ingress or low inlet pressure creates bubbles in the fluid.
Solutions:
1). Lubricate or replace bearings regularly.
2). Re-align couplings and ensure the pump-motor assembly is level.
3). Check for air leaks in suction lines and prime the pump properly.
4. Leakage at Seals or Joints
Possible Causes:
1
). Worn mechanical seals: Aging or abrasive media damages seal surfaces.
2
). Loose fittings: Improperly tightened bolts or degraded O-rings.
Solutions:
1
). Replace mechanical seals or O-rings and ensure correct installation.
2
). Tighten connections and inspect pipelines for cracks.
5. Overheating or High Motor Load
Possible Causes:
1
). Excessive discharge pressure: Overloading due to system resistance.
2
). High fluid temperature: Inadequate cooling or ambient heat.
3
). Internal friction: Rotor scraping against the chamber.
Solutions:
1
). Reduce backpressure by enlarging discharge pipes or removing restrictions.
2
). Install cooling systems or switch to heat-resistant materials.
3
). Adjust rotor clearance or replace damaged components.
Preventive Maintenance Tips
To minimize failures, adopt these practices:
Regular inspections: Check seals, bearings, and alignment monthly.
Lubrication: Use high-quality grease for bearings and gears.
Proper shutdown: Drain and clean the pump after use to prevent media hardening.
Correct installation: Ensure inlet/outlet orientations match design specifications.
Conclusion
Understanding these common issues and their fixes can significantly extend the lifespan of your cam rotor pump.
Always prioritize preventive maintenance and consult professional technicians for complex repairs.
For specialized support, partner with trusted manufacturers to ensure optimal performance.
For more detailed guides, explore our technical resources or contact our team!
