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When the water ring vacuum pump is running at variable speed relative to the specified speed, the critical compression ratio will decrease and the performance requirements can not be met. When the speed is increased, the shaft power will rise rapidly and the efficiency will be reduced. It is not only uneconomical, but also there is the risk of burning the motor and causing accidents if the matching motor with increased capacity is not replaced correspondingly Flow, unstable working condition (especially in the area with high vacuum degree), and even can not form water ring, which makes the water ring vacuum pump can not work. Therefore, it is not appropriate to deviate from the specified speed.

1. In the process of its pumping, if the pipe is blocked and the water ring vacuum pump is overloaded for a long time, the motor will be overloaded.

2. Its water inlet generally does not need water pressure, if the water inlet pressure is too high, too much water will cause motor overload.

3. Sometimes in use, there will be a certain amount of moisture entering the air inlet. If the moisture enters for too long, the motor will be overloaded.

4. In its pipeline installation, if the outlet pipe is too long or the diameter of the air outlet pipe is smaller than the diameter of the exhaust port, it will often cause overload.

5. Bearing in the use of a long time, the performance will slowly reduce, if the bearing problems, if not found in time, will also cause overload.

The performance of water ring vacuum pump is expressed by the following parameters: exhaust pressure, vacuum degree, gas volume, shaft power, effective power and efficiency.

The factors that affect these performances are as follows: impeller size, eccentricity, atmospheric pressure, air temperature, water temperature, impeller circumferential speed, air relative humidity and so on. Among them, the circumferential speed of impeller has a very important influence on the performance of water ring vacuum pump. For a water ring vacuum pump in operation, the effect of circumferential speed on the performance of water ring vacuum pump is essentially the influence of rotating speed on the performance of water ring vacuum pump.

1. Temperature. As the water temperature rises, the cooling system is not working well.

2. The sealing degree of papermaking white water is increased, the content of insoluble substance is high, and the scale ion is accumulated.

3. The water circulation system is not cleaned and maintained regularly.

4. Extensive use of fillers.

5. Water quality impact. High pH value and high hardness.