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ChineseClassified by suction and exhaust state
1) Liquid ring pump. A liquid ring pump in which the inlet of the pump is in a vacuum state and the outlet is in an atmospheric pressure state. Mainly used for vacuum water diversion (deacidification, degassing), vacuum regain, etc. Single-stage pump ultimate vacuum ≤50hPa, two-stage pump ≤39hPa.
1) Liquid ring pump. A liquid ring pump in which the inlet of the pump is in a vacuum state and the outlet is in an atmospheric pressure state. Mainly used for vacuum water diversion (deacidification, degassing), vacuum regain, etc. Single-stage pump ultimate vacuum ≤50hPa, two-stage pump ≤39hPa.
2) Liquid ring compressor. A liquid ring pump in which the pump inlet is at atmospheric pressure and the outlet is under pressure. Mainly used for the pressure delivery of hydrogen, chlorine, vinyl chloride and other media in the chemical industry. The discharge pressure of a single-stage pump can reach 0.3 MPa, and a two-stage pump can reach 0.6 MPa. Compressors with more than two stages are complicated in structure, and the increase in compression capacity is not proportional to the number of stages, and is generally not used.
At present, the market also needs a liquid ring pump that is between the vacuum pump and the compressor, that is, the inlet is in a vacuum state, the outlet is in a pressurized state, and the working pressure is generally lower than 500hPa. We will call it liquid ring vacuum-compression pump for the time being. . It is often used for pumping gas and counter-fire furnace gas underground in coal mines.
At present, the market also needs a liquid ring pump that is between the vacuum pump and the compressor, that is, the inlet is in a vacuum state, the outlet is in a pressurized state, and the working pressure is generally lower than 500hPa. We will call it liquid ring vacuum-compression pump for the time being. . It is often used for pumping gas and counter-fire furnace gas underground in coal mines.
According to the direction of suction and exhaust
1) Axial suction and exhaust gas enters and exits the impeller along the axial direction through the suction and exhaust windows on the side distribution plate.
The suction and exhaust windows of this method are arranged on the plane of the distribution plate on the side of the impeller. The exhaust window can be made adjustable, which minimizes the overcompression of the low vacuum zone and the undercompression of the high vacuum zone. The power curve is no Overload shape and widen the high-efficiency area. In the trial production process, the window size and angle can be easily changed to achieve the best efficiency. In addition, this method has a simple structure and is easy to be made into a two-stage pump, but due to the limitation of the window area, it is not suitable to be made into a double acting type.
1) Axial suction and exhaust gas enters and exits the impeller along the axial direction through the suction and exhaust windows on the side distribution plate.
The suction and exhaust windows of this method are arranged on the plane of the distribution plate on the side of the impeller. The exhaust window can be made adjustable, which minimizes the overcompression of the low vacuum zone and the undercompression of the high vacuum zone. The power curve is no Overload shape and widen the high-efficiency area. In the trial production process, the window size and angle can be easily changed to achieve the best efficiency. In addition, this method has a simple structure and is easy to be made into a two-stage pump, but due to the limitation of the window area, it is not suitable to be made into a double acting type.
2) Radial suction and exhaust
The gas enters and exits the impeller along the radial direction through the suction and exhaust windows on the surface of the distributor installed in the impeller wheel. This method can be made into single or double action mode, especially when it is made into double action mode, because of the larger window area, the efficiency is much higher than the axial type. However, its structure is complex, manufacturing is difficult, the window size cannot be adjusted, and it is not easy to make a two-stage pump.
The gas enters and exits the impeller along the radial direction through the suction and exhaust windows on the surface of the distributor installed in the impeller wheel. This method can be made into single or double action mode, especially when it is made into double action mode, because of the larger window area, the efficiency is much higher than the axial type. However, its structure is complex, manufacturing is difficult, the window size cannot be adjusted, and it is not easy to make a two-stage pump.
