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If the vacuum pump works in cavitation condition for a short time, the noise and vibration of the pump will be increased, and even the pump will be damaged. Therefore, it is necessary to prevent the water ring vacuum pump from operating under cavitation condition. So, what are the measures to prevent the vacuum pump from cavitation?

1. Increase the heat of the water.

Because the vacuum pump icing water temperature rise will lead to a significant increase in its pumping energy, leading to cavitation damage of the vacuum pump impeller. Therefore, the motive of preventing cavitation is to increase the heat of water.

2. Popularize the correctness of model selection.

Make the vacuum pump run in the safe sea area, that is to prevent the vacuum pump from operating in the sea area with critical vacuum degree or critical exhaust pressure, and increase the cavitation with large volume.

3. Device cavitation shield pipe.

That can greatly increase the damage of cavitation to the pump and increase the noise and vibration caused by cavitation.

4. Equipped with atmospheric injector.

Because the atmospheric ejector is set to prevent the cavitation of vacuum pump and protect the vacuum pump, the vacuum formed by suction of normal vacuum pump with atmospheric ejector is better than that without installation.

5. Use lower saturated vapor liquid as working fluid.

When the working fluid is changed from water to transformer oil, the saturation vapor pressure of the oil is lower and the promotion is higher. When using organic solvent as working fluid, attention should be paid to whether the motor is explosion-proof and the corrosion of vacuum pump and its seals.

6. The impeller and disc of the pump adopt the data with strong anti cavitation power.

Compared with the steps of non-metallic and alloy (including stainless steel), the non-metallic coating is economical in form, but its operation process should be widely mastered to prevent coating falling off. The adoption of alloy powder spray welding has good motive but high profit, and some central authorities may be helpless to continue.

Cavitation of vacuum pump is a common fault of vacuum pump, any vacuum pump will produce cavitation. In the daily life of the central vacuum pump, do a good job in the fundamental protection of the facilities, have a vague awareness of the cavitation of the vacuum pump, and properly choose the steps to prevent cavitation, it is sure to achieve the goal of aggravating the cavitation of the vacuum pump.