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Working Principle Of Liquid Ring Vacuum Pump Jan 09, 2020

There are many types of liquid ring vacuum pumps, such as 2BV series liquid ring vacuum pumps, 2BE series liquid ring vacuum pumps, 2SK series liquid ring vacuum pumps, SK series liquid ring vacuum pumps, and SZ series liquid ring vacuum pumps.

These liquid ring vacuum pumps have different vacuum degrees, but they are similar in principle. Here, introduce the working principle of 2BV series liquid ring vacuum pump:

The impeller is eccentrically installed in the pump body. When the impeller rotates, the water entering the liquid ring vacuum pump pump body is thrown around by the impeller. Due to the centrifugal force, the water forms a closed water of equal thickness similar to the shape of the pump cavity. ring. The upper inner surface of the water ring is exactly tangent to the impeller hub, and the lower inner surface of the water ring is just in contact with the tip of the blade (in fact, the blade has a certain depth of insertion in the water ring). At this time, a crescent-shaped space is formed between the impeller hub and the water ring, and this space is divided into several small cavities equal to the number of blades by the impeller. If the upper part of the impeller is 0 ° as the starting point, then when the impeller rotates 180 ° before, the volume of the small cavity gradually changes from small to large, and the pressure continuously decreases, and it communicates with the suction port on the suction and exhaust disc. The pressure in the space is lower than the pressure in the pumped container. According to the principle of gas pressure balance, the pumped gas is continuously pumped into the small cavity, which is now in the process of inhaling. When the suction is completed, it is isolated from the suction port, the volume of the small cavity is gradually decreasing, and the pressure is constantly increasing. At this time, it is in the compression process. When the compressed gas reaches the exhaust pressure in advance, it advances from the auxiliary exhaust valve. exhaust. The volume of the small cavity communicating with the exhaust port further reduces the pressure and further increases. When the pressure of the gas is greater than the exhaust pressure, the compressed gas is discharged from the exhaust port. During the continuous operation of the pump, The process of suction, compression and exhaust is carried out in order to achieve the purpose of continuous pumping.