About the water ring vacuum pump insufficient phenomenon of compression and compression phenomenon _

water ring vacuum pump is a liquid ring vacuum pump is one of the most common. Liquid ring vacuum pump is installed in the pump housing rotor blades have more eccentric. Thrown when it rotates, the fluid and the pump shell liquid ring pump casing concentric with the stated, formation volume displacement pump and liquid ring of rotor blade rotation cycle. When the working fluid is water, the water ring pump.

water ring vacuum pump working principle of

the impeller and the pump body is eccentric configuration, when the impeller rotates, the water under the action of centrifugal force along the wall in the pump body is close to the rotation of the thick water, such as ring, water ring internal surface and external surface of the impeller wheel constitute a crescent-shaped work chamber, and the impeller blade split into a cavity sizes. The first half of the cavity volume gradually expand, gas suction from the outside world; After half a turn a shrinking volume of the cavity, the gas is compressed the back from the outside world. To complete the suction, compression, exhaust three stages of work.

compression phenomenon and compression phenomenon of insufficient

1, a compression phenomenon: closed small cavity to vent, its gas has reached exhaust pressure ( General often occurred in large pump, and at high suction pressure likely to happen) ;

2, insufficient compression phenomenon: closed cavity connected with vent, but it has yet to reach the exhaust gas pressure ( Occurs when the suction pressure is lower) 。

with the above phenomenon are suction gas pressure change, and the two pump location ( Compression ratio) Fixed on.

solution 1, set up in front of the vent rubber ball valve: when small cavity gas early to reach the exhaust pressure, ball valve to open.

2, using the flexible exhaust valve design ( Patent) To avoid a compression phenomenon. Flexible exhaust valve automatically adjust the vent area and reduce the energy consumption of the pump. So as to achieve efficiency.

3, the design, the suction pressure ( Extreme pressure) To determine the compression ratio of the pump ( Vent position)

compression ratio = p a/p = V into the a/V

design: p into take extreme pressure

water ring vacuum pump has the following advantages

1, simple structure, manufacturing accuracy is not high, easy to processing.

2, compact structure, the revolutions of the pump is higher, and can generally be motor straight league.

3, the structure of the small size, can obtain large displacement, covers an area of small also.

4, compressed gas is isothermal, basically the process of compressed gas temperature change is very small.

5, because no metal friction pump cavity surface, the pump inside without lubrication, and wear and tear is small.

6, the seal between the rotating and stationary parts can be directly done by water seal, do not need other sealing, etc.