Working Principle

As the gas compression process of the water ring pump is under isothermal condition, the flammable and explosive gases can be exhausted, as well as gases containing dust and water; therefore the application of the water ring pump is growing.

The figure is the functional diagram of water ring pumps. The water ring pump consists of the impeller, pump body, suction and exhaust tray, water ring formed by water at the inner wall of pump body, air entry, air outlet, auxiliary exhaust valve, and other components.

The impeller is eccentrically installed in the pump body. When the impeller rotating by the direction showed in the figure, the water entering the body of water ring pump impeller pump body is thrown around by the impeller, and as a result of centrifugal force, the water forms a closed water ring constant thickness which is similar with the shape of the pump chamber. The internal surface of the upper part of water ring pump is exactly tangential to impeller wheel hub, and the internal surface of the lower part exactly contact the top of vanes (in fact, vanes are inserted into the water ring for a certain depth). At this time, a crescent-shape space is formed between the impeller wheel hub and the water ring, which is divided into several small chambers with same number of vanes by the impeller. If regard the of upper part of the impeller as the starting point, when the impeller rotating for 0~180 the capacity of the small chamber gradually increases, and pressure continuously gets down. As the chambers are connected with the air entry of the suction and exhaust tray, when the pressure in the small chamber space is lower than that in the container in which the gas is pumped, according to the principle of gas pressure balance, the pumped gas is continuously drawn into the small chamber, that is, the pump is in the process of suction. When the suction is completed, the small chamber is isolated from the air entry. The capacity of the small chamber is gradually reduced, the pressure continuously increases, that is the pump is in the process of compression. With the pressure of the compressed gas reaches the exhaust pressure in advance, it will be exhausted from the auxiliary exhaust valve. The capacity of the small chamber which connected with the air outlet is further reduced, and its pressure further increases. When the gas pressure is higher than the exhaust pressure, the compressed gas will be exhausted from the air outlet. In the continuous running of the pump, it continuously repeats the process of suction, compression, and exhaust, so as to achieve continuous pumping.

Applications

They are mainly for pumping air and other gases which have certain corrosively and a small amount of dust, and are not soluble in water, and widely used in the technical processes of vacuum evaporation, concentration, feeding, dehydration, drying, and so on in food, textile, medicine, chemical industry and other fields. Pumps of this series possess compact structures, and are reliable to use, convenient to install and disassemble, and easy to maintain. .

Performance Parameters of the Vacuum Pump

Suction Capacity	220 to 5000m3/hr
Power Consumption	7.5 kw to 132 kw
Maximum Vacuum	710 mm of Hg (G)