Common Faults And Solutions Of Vacuum Pumps

Generally, the reasons that cause the vacuum pump to fail to start normally include the following:

1. The drive motor voltage is incorrect or overloaded.

Solution: Provide the correct voltage for the motor.

2. The overload protection of the motor starter is too small or the setting value is too low.

Solution: Compare the setting data of the overload protection of the motor starter with the data on the motor nameplate, and correct it if necessary. If the ambient temperature is high: the set value can be increased by 5% according to the normal motor current.

3. If the vacuum pump is equipped with an AC motor: the capacitor of the motor is damaged.

Solution: Repair or replace the motor. (to be operated by professional vacuum pump maintenance personnel)

4. Check the use of vacuum pump oil. The vacuum pump has returned to oil, the oil temperature is too low, the oil has deteriorated, and the vacuum pump cavity is filled with vacuum pump oil. Observe whether the oil has been emulsified (white foam) or carbonized (blackened), The deterioration of the vacuum pump oil will affect the friction between the rotary vane and the rotor and cause the vane to be stuck in the pump cavity.

Solution: replace the vacuum pump oil, disassemble the vacuum pump to repair the cylinder block and other components, if the blades are seriously damaged, the vacuum pump blades need to be replaced.

5. The vacuum pump or motor is stuck.

Solution: Confirm that the motor is powered off and disconnect the fan cover. Manual motor and vacuum pump are used. If the handle does not move, remove the motor from the pump, and check the vacuum pump and motor respectively. If the vacuum pump is stuck, please repair the pump in time (requires professional vacuum pump maintenance personnel for maintenance and inspection).

6. The exhaust pipe is blocked.

Solution: Remove the suction pipe, run the pump alone, and touch the air inlet and outlet with your hand to see if the pump can work normally. If the pump cannot pump air at this time, it is the problem of the pump itself.

7. The lubricating oil has not been replaced for a long time, and there are solid deposits inside, which block the inlet and outlet passages.

Solution: Open the pump head, replace the lubricating oil, and clean the pump head with gasoline or diesel.