Vacuum pump has been more and more commonly used, today on some simple faults and troubleshooting to do some introduction.

First, the turning of vacuum pump is not smooth. The reason of this kind of condition is that it is not used for a long time, which causes rust on the end face of the disc or the scaling of pump cavity caused by high water temperature. The elimination method is to fill the pump cavity with 10% oxalic acid for about 30 minutes, and then loosen the pump cover before turning, or reduce the fouling coefficient of the working fluid.

Second, the vacuum pump motor is not working properly. If the motor is lack of phase, check whether the power connector falls off; if the voltage is abnormal, check the power supply voltage; if the AC contactor is damaged, replace the AC contactor.

Third, the walking sound of water ring vacuum pump is abnormal. Generally, it is caused by the working fluid filling the pump cavity when starting. At this time, open the drain outlet to discharge part of the working fluid in the pump, which can be reduced by a part.

Fourth, water ring vacuum pump can not form a vacuum. This situation is caused by two reasons. One is that there is no working fluid, so check the supply of working fluid; the other is steering error. At this time, it is only necessary to correct the steering.

Fifth, the vacuum degree of water ring vacuum pump is low. If the pumping rate is low due to the small pump selection, the pump with higher pumping speed should be replaced; if the supply of working fluid is insufficient, the supply should be increased; if the temperature of working fluid is too high, the temperature should be reduced; if the system has air leakage, it is necessary to check and stop the leakage; if the disc or impeller is corroded, the round wheel or impeller should be checked and replaced.

Sixth, the current of water ring vacuum pump is too large. Check whether it is caused by the high upward pipeline of the drainage pipe. If it is caused by the excessive supply of working fluid, it is necessary to reduce the supply of working fluid.

Seventh, vacuum pump mechanical seal leakage. Generally, it is caused by dry running pump without injection of working fluid and coolant. At this time, it is necessary to replace the mechanical seal and change the operating procedures.