The water ring vacuum pump is simply called a water ring pump and it can be used as a compressor. It is widely used in various sectors such as petrochemicals, machinery, mining, medicine, and food. How much do you know about the working principle of the water ring vacuum pump? Next we will understand the principle of the water ring vacuum pump through the water ring vacuum pump schematic.
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Water ring vacuum pump principle: In the pump body with a suitable amount of water as a working fluid. When the impeller rotates clockwise in the direction indicated in the figure, the water is thrown around by the impeller. Due to the effect of centrifugal force, the water forms a closed loop of approximately equal thickness depending on the shape of the pump chamber. The inner surface of the upper part of the water ring is just 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 with equal number of blades by the impeller. If the starting point of the upper part of the impeller is 0°, then the volume of the small cavity will increase from small to large when the impeller rotates 180°, and it will communicate with the suction port on the end face. At this time, the gas is sucked in. When the suction is finished, the small cavity It is isolated from the suction port; when the impeller continues to rotate, the small cavity changes from large to small and the gas is compressed; when the small cavity communicates with the exhaust port, the gas is discharged from the pump.
The water ring vacuum pump is usually simple in structure and easy to process; it has a compact structure, a small footprint, simple operation and easy maintenance. Some types of pumps are not suitable for flammable and explosive gases, but water ring vacuum pumps do not have this problem because the compressed gas is isothermal. This is why the water ring vacuum pump is becoming more and more widely used. 
