What is the flow process in water ring vacuum pump?

Water ring vacuum pump is widely used in our life. What is the flow process in water ring vacuum pump? Today small make up with you to analyze together.
In the design of water ring vacuum pump, it is very important to determine the circumferential velocity of impeller, because the circumferential velocity has a great influence on pump performance, which can be said to be global. Other pump parameters, such as critical compression ratio, ultimate vacuum and efficiency, are closely related to the weekly velocity. Generally speaking, if the weekly velocity is too small, the pump will not reach the predetermined critical compression ratio, and the ultimate vacuum will also decline, resulting in the narrow working range of the pump and the increase of shaft power in high vacuum area. On the other hand, if the peripheral speed is too big, can improve the critical compression ratio and ultimate vacuum pump, but too big weekly rate will decrease the efficiency of the pump, shaft power will also rise. And because of the influence of liquid ring medium evaporation pressure, excessive peripheral speed does not make critical compression ratio proportionately increased. Therefore, peripheral speed selection should not be too big. How to reasonably select peripheral speed, the performance of the pump not only has satisfactory, and there was a small energy consumption, water ring pump is design problem worthy to be discussed.
When rotating impeller spins liquid liquid ring formation, liquid ring as a closed chamber of a boundary on the suction area constantly from kinetic energy, the impeller speed constant Po, until the most eccentric point on the impeller impeller rotational speed to address large value, and in the compression zone in the form of "piston" work for gas compression, will get part of kinetic energy to the gas from the impeller, the gas pressure, the working process of the water ring pump is actually between the impeller, liquid ring, gas to the conversion process, abide by the laws of energy ping street. The kinetic energy of liquid ring depends on the circumferential velocity of impeller. A large circumferential velocity indicates that the liquid has a large kinetic energy from the impeller and a strong ability to do work to the gas, which means that a certain volume of gas can obtain a higher compression ratio. Liquids, on the other hand, do less work with gases.
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