Troubleshooting in a rotary vane vacuum pump (1)

troubleshooting rotary vane vacuum 1

Keyword: troubleshooting rotary vane vacuum pump

Any product will have inevitable damage after use for a long time. What shall we do if the vacuum pumps don’t work properly, which are widely used in many industrial fields? Let’s learn some most popular reasons for vacuum pump troubleshooting and maintenance.

1. The vacuum pump doesn't run.

The vacuum pump cannot start running after the power is applied. In this case, the circuit of the vacuum pump should be checked first, including the fuse and circuit components. Considering the following factors if the circuit has no problem:

  • Motor is burned. The coil of the motor stator could be burned, caused by reasons such as large instantaneous current, or worn motor bearings resulting in increased bearing friction resistance which causes temperature rise and consequently burns the motor. It’s recommended to check the motor bearings first, and then the motor coil. Replace the worn bearings and repair the motor in case of any damage. If both are badly damaged, the motor needs to be replaced.
  • Rotary vanes are blocked. The friction resistance between the rotary vanes and the surface inside the pump chamber is too large, resulting in the motor cannot drive the rotary vanes. The reason could be: 1. Deformation of the rotary vanes. The springs inside the vanes cannot move back to the position after they’re extended. 2. The combined force of the spring pressure and vane’s centrifugal force is too large, resulting in excessive friction resistance between the rotary vanes and the surface inside pump chamber. In this case, the vanes and springs should be repaired or replaced immediately.

Some other less possible reasons are: low ambient temperature, improper vacuum oil (high viscosity) or high oil level (too much oil added).

Click to find out Troubleshooting Part Two and Troubleshooting Part Three.

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