Water ring vacuum pump working principle

EVP vacuum pump manufacturers to introduce a water ring vacuum pump working principle is what?
Water ring vacuum pump (referred to as water ring pump) is a crude vacuum pump, which can obtain the limit vacuum of 2000~4000Pa, series atmospheric injector can reach 270~670Pa. Water ring pump can also be used as a compressor, known as water ring compressor, is attributed to the low pressure of the compressor, its pressure scale is 1~2 * 105Pa table pressure.
Water ring pump began as a self-priming pump, and then gradually used in petroleum, chemical, machinery, mining, light industry, medicine and food and many other industrial sectors. In many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing, water ring pump is widely used. Because of the rapid development of vacuum technology, water ring pump has always been paid attention to in crude vacuum. Because the water ring pump gas contraction is isothermal, it can be removed flammable, explosive gas, in addition, but also can be removed dust, water gas, therefore, the use of water ring pump increasing.
The pump body is provided with an appropriate amount of water as the working fluid. When the impeller rotates clockwise in the figure, water is thrown around by the impeller. Because of the effect of centrifugal force, water forms a closed ring of approximately equal thickness depending on the shape of the pump chamber. The lower part of the water ring is exactly tangent to the hub of the impeller, and the upper part of the inner part of the water ring is just touching the top of the blade (in practice, the blade has a certain penetration depth in the water ring). At the moment, a crescent space is formed between the hub of the impeller and the water ring. If the bottom of the impeller 0 ° as starting point, so in front of the rotating impeller 180 ° when small cavity volume changes from small to big, and on the face of inspiratory mouth, air is sucked into at the moment, when the suction at the end of the small cavity is isolated from the rest of inspiratory mouth; When the impeller continuously rotates, the small cavity changes from large to small, so that the gas is compressed. When the small cavity and vent connected, the gas will be discharged from the pump.
To sum up, water ring pump is by the pump chamber volume change to achieve suction, contraction and exhaust, so it belongs to the variable volume vacuum pump.

Vacuum pump for gas collection
Water ring vacuum pump factory