Water ring vacuum pump (water ring pump) is a kind of coarse vacuum pump, which consists of pump cover, pump body, disc, impeller, mechanical seal, motor and other parts. The seal of the pump adopts mechanical seal, which is installed between the impeller and the pump body. The clearance between impeller and pump body is determined by mechanical seal. 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 vacuum pump has been widely used.
A disc is installed on the pump cover, and the disc is equipped with suction, exhaust holes and flexible exhaust valve discs. The function of flexible valve discs is to discharge the gas before the exhaust outlet when the gas pressure between impeller blades reaches the exhaust pressure, thus reducing the power consumed by excessive gas pressure and reducing the rate consumption. The intake pipe and exhaust pipe are connected with the pump cavity through suction holes and exhaust holes installed on the disc on the pump cover. The shaft is eccentrically installed in the pump body. The impeller is fixed on the shaft with a flat key. The gap between the two ends of the pump is adjusted by the cushion between the pump body and the disc on the pump cover. The gap between the impeller and the disc on the pump cover is adjusted by the cushion between the disc and the pump body, and between the two ends of the impeller and the disc on the pump cover. The gap determines the loss of gas and its limit pressure in the flow from the intake port to the exhaust port in the pump chamber.