Water ring vacuum pump working principle -

water ring vacuum water pump ( Known as the water ring vacuum pump) Is a rough vacuum pump, can achieve 2000 ~ 4000 limiting vacuum of pa and pa 270 ~ 670 series of atmospheric pressure syringe. Water ring vacuum pumps can be used as a compressor, also called water ring compressor. It is the pressure range of 1 ~ 2 x 105 pa low-pressure compressor.

water ring vacuum pump was originally used as a self-priming pump, and gradually used in many industry departments, such as oil, chemical industry, machinery, mining, light industry, medicine and food. Many of the water ring vacuum pump is widely used in industrial production process, such as vacuum filter, vacuum water transfer, vacuum feed, vacuum evaporation, vacuum concentration, vacuum resurgence and vacuum degassing. Due to the rapid development of vacuum technology, water ring vacuum pump in the coarse vacuum get attention. Because of the water ring vacuum pump, gas compression is isothermal, so it can remove inflammable and explosive gas, also can remove dust and water cut of more gas. Therefore, the application of water ring vacuum pump is on the rise.

contains the right amount of water as the working fluid in the pump body. When the impeller along the clockwise direction as shown in the figure, the water will be thrown impeller. Due to the centrifugal force, according to the shape of the pump chamber, water closed loop formation thickness is approximately equal. Water ring area on the surface of wheel tangent with the impeller and the water ring in the lower part of the surface (contact with the tip of the blade is just In fact, in 020 - leaf In a certain insertion depth 0) 。 At this point, the impeller wheel and water ring form a crescent-shaped space, and the space be impeller is divided into multiple with the same number of small cavity. If the upper part of the impeller of 0 °, 180 ° before rotating impeller, the volume of a small cavity will be growing up, and with the suction mouth is connected on the face. At this time, the gas is inhaled. Breathe in, after the completion of 020 - 14 and inspiratory mouth isolation; When finish inhaling, inspiratory mouth have been quarantined. When the impeller to rotate, small cavity from large to small, and compressed gas. When the cavity is connected to the outlet of the gas is discharged to the outside of the pump.

to sum up, the change of water ring vacuum pump on pump cavity volume to achieve suction, compression and exhaust, and so it is variable displacement pump.

compared with other types of mechanical vacuum pump, water ring vacuum water pump has the following advantages:

1, simple structure, manufacturing precision is not high, easy to processing.

2, compact structure, high the revolutions of the pump, usually can be directly connected to the motor, without the need for speed reducer. Therefore, under the condition of the structure of small size, can obtain large displacement, and cover an area of an area small.

3, compressed gas is isothermal, basically is to say, in the process of compressed gas temperature change is very small. Due to no metal friction surface in the pump chamber, so without lubrication pump, and the wear is small. Both fixed and rotating components component between the sealing can be done directly through the water seal.

4, suction and uniform, stable and reliable running, simple operation, easy maintenance.

water ring vacuum pump also has its disadvantages:

1, low efficiency, usually about 30%, it is best to be as high as 50%.

2, vacuum degree is very low, this is not only due to the structure limits, and more importantly, because of the working fluid saturation vapor pressure. Using water as working fluid, extreme pressure can reach 2000 ~ 4000 pa. Use oil as a working fluid, the highest 130 pa.

in short, because the water ring vacuum pump, gas compression is isothermal, so you can remove inflammable and explosive gas. Because there is no exhaust doors and friction surface, so it can remove dust, gas condensable gas and water mixture. Has the function of these wonderful though inefficient, but it is still widely used.

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