Inspection procedure and elimination method of excessive noise of vane pump

After many vane pumps have been in use for a long time, various problems will occur. The noise is a very common phenomenon. In this case, how to solve the problem after a large noise.

1. The first thing to check is the suction port or filter to see if there is any blockage. If it is, remove the dirt and keep the oil suction pipe open. If not, continue to the next step.

2. Check if the seal at the suction port connection is sufficient. Air entry is a cause of noise. We need to strengthen the seal and tighten the connection.

3. Check if the suction port is too high and the tank level is too low. This phenomenon is also the source of noise. We need to lower the suction port height and add fuel to the tank.

4. Check if the pump and coupling are at different axes or loose. If this happens, we need to reinstall it to make it concentric and tighten the connector.

5. Loose connection screws can also cause the vane pump to be noisy. We need to properly tighten it when repairing.

6. There is also a viscosity of the hydraulic oil that is too large, and the suction function of the suction port filter is small. Solution: Replace the hydraulic oil with the proper viscosity and replace the filter with large flow capacity.

7. Look for the presence of the inner surface of the stator, the wear of the surface in the oil absorption area of ​​the stator, the inflexibility of the individual blades, or the reverse of the movement. If so, we need to polish the inner surface of the stator, flip the stator, and check one by one. Reassembly, repair methods for inflexible blade reassembly.