Part1 What’s the 2BV water ring vacuum pump
Water ring vacuum pump namely water pump, 2BV water ring vacuum pump is a low pressure vacuum pump, its ultimate vacuum pressure is 2000 ~ 4000Pa, the 2BV water pump and roots pump can make the water roots vacuum system, this system pressure can up to 1 ~ 600Pa. 2BV water ring vacuum pump can also be used as a compressor, it known as the water ring compressor, it’s a low-pressure compressor and the pressure range is 1 ~ 2 × 105Pa(G).
2BV water ring vacuum pump was used as a self-suction pump originally. Then it gradually be used in oil, chemicals, machinery, mining, light industry, medicine and food industry etc.
Water ring pump has been widely used in the process of many industrial, such as vacuum filtration, vacuum water, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum resurgence and vacuum degassing. Due to the water ring vacuum pump’s gas be compression in the same temperature, it can be removed flammable and explosive gas. In addition, It also can suction the gas included the dust and water. Therefore, 2BV water ring vacuum pump’s application is increasing day and day.
Part2 The principle of 2BV water ring vacuum pump operation
When the impeller of the 2BV water ring vacuum pump rotates against the clock then the water is shaken by the impeller. The water forms a closed ring due to the centrifugal force. The lower inner surface of the water ring is exactly tangent to the impeller’s shell, and the upper inner surface of the water ring is exactly touch with the top of blade(in fact, the blade has a certain insertion depth in the water ring). At this time, it have a crescent-shaped space between impeller’s shell and interface of water ring, and this space has been separated some small space by the some blades. If the lower of impeller is 0°(starting point), the volume of small space will become big in the when impeller is 180 ° and it connect with the suction port. At this time, the gas is suctioned, small space will be separated from the suction port when the end of the suction. When the impeller continues to rotate, the small space will become small from the big so that the gas is compressed. When the small space connect with exhaust port, the gas will be discharged.
2BV water ring vacuum pump achieve suction, compression and exhaust by the pump chamber volume changes. So it’s belongs to variable capacity vacuum pump.