With the rapid development of national economy, water ring compressor is widely used in industry. Water ring compressor is called “general machinery” because of its wide use.
Compressor is a kind of machine that compresses gas to increase gas pressure or convey gas. Compressor is also called compressor and compressor fan. All kinds of compressors belong to power machinery. They can reduce the volume of gas and increase the pressure. They have certain kinetic energy and can be used as mechanical power or other purposes. According to the different compressed gases, it is called air compressor, oxygen compressor, ammonia compressor, natural gas compressor and so on.
Water-ring vacuum pump (hereinafter referred to as water-ring pump) is a kind of coarse vacuum pump, which can obtain the limit vacuum of 2000-4000Pa, and the vacuum degree of the unit composed of water-ring vacuum pump and vacuum pump can reach 1-600 Pa.
Water ring vacuum pumps are suitable for transporting gas-liquid mixtures. They can also be used as pumps and air compressors. The absolute vacuum produced by these pumps is relatively high. The compression ratio depends on the pressure of the rotating water ring and the size and shape of the outlet in the side wall. Water ring vacuum pump can also be used as a compressor, known as water ring compressor, is a low-pressure compressor, its pressure range is 1-2*105Pa gauge pressure.
Water ring vacuum pump was initially used as self-suction pump, and then gradually used in petroleum, chemical industry, 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 pumps are widely used. Due to the rapid development of vacuum application technology, the water ring pump has been attached great importance in obtaining rough vacuum. Because the gas compression in the water ring pump is isothermal, it can extract flammable and explosive gases, in addition, it can also extract dust and water containing gases. Therefore, the application of the water ring pump is increasing.
The working fluid of water-ring vacuum pump can also use other suitable liquids. Whichever working fluid is used, it is collectively called liquid-ring vacuum pump. Water ring vacuum pump is one of the most common and widely used liquid ring vacuum pumps.
The pump body is equipped with appropriate amount of water as working fluid. When the impeller rotates clockwise in the figure, the water is thrown around by the impeller. Because of the centrifugal force, the water forms a closed ring which is approximately equal in thickness depending on the shape of the pump chamber. The inner surface of the lower part of the water ring is just tangent to the hub of the impeller, and the upper inner surface of the water ring is just in contact with the top of the blade (in fact, the blade has a certain insertion depth in the water ring). At this time, a crescent-shaped space is formed between the hub of the impeller and the inner interface of the water ring, which is divided into several small cavities equal to the number of blades by the impeller blades. If the lower part of the impeller is 0 degree as the starting point, the volume of the small chamber increases from small to large when the impeller rotates 180 degrees, and is connected with the suction port on the end surface. At this time, the gas is absorbed, and at the end of the suction, the small chamber is isolated from the suction port; when the impeller continues to rotate, the small chamber becomes smaller and compresses the gas; when the small chamber and the exhaust port continue to rotate, the gas is compressed. When connected, the gas is discharged out of the pump.
water ring compressor characteristics :
1. Simple structure, no need for suction and exhaust valves, stable and reliable operation, no internal friction of the pump metal surface, suitable for filtration, vacuum drying, sterilization, pneumatic transportation, etc. It is also used in single or multi-stage fire pumps or marine pumps as a vacuum pump to fill the vane pump with water. Water ring vacuum pump has single cavity and double cavity structure.
2. Compact structure, high speed pump, generally can be directly connected with the motor, without deceleration device. Therefore, with a small structure size, we can get a large amount of exhaust gas and occupy a small area.