Water ring vacuum pump model how to choose question _

What is the water ring vacuum pump

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

water ring vacuum pump impeller in the pump shell eccentric installation. Before the start in the pump cylinder deaerated water pumping, Working fluid) 。 When the impeller rotate clockwise, due to the effect of centrifugal force, the liquid to jilt to pump body wall, the rotation of the impeller force working liquid along the water pump shell inner wall to form a decision in the pump cavity shape similar to the thickness of the closed circle, etc. At this point, the two adjacent blades, wheel hub, and liquid ring formed between the inner surface is a working fluid sealed 'gas cavity'. Due to the impeller in the pump shell is eccentric configuration, so the inner surface of the water ring and a crescent-shaped space formed between the impeller wheel, it is leaves divided into several small volume of room, to turn the volume of each cell is along with the impeller cycle increase and decrease, when the chamber volume gradually expand, gas suction by the outside world, when the chamber volume shrinking, make originally suction and exhaust gas is compressed. In this way, the impeller per week, between the blade and blade small chamber volume change at a time. Between every two blades liquid as liquid piston reciprocating motion, continuous suction gas, achieve the goal of vacuum.

water ring vacuum pump selection

1, should choose as far as possible speed lower specification

the use of water ring vacuum pump in our country is most likely to be 2 series, belongs to the axial suction exhaust single-acting pumps, have multiple speed for choice, for the same specifications as the inlet pressure 200 hPa and 600 hPa, exhaust pressure of 800 hPa and 1013 hPa, the impeller blades of cylindrical linear velocity for 14 ~ 17 m/s, because pump impeller diameter of large size large is rotational speed is low, so under the premise of same swept volume, should choose as far as possible speed lower pump, large pump than smaller power consumption, high efficiency.

2, should consider the influence of water temperature

because of the water ring vacuum pumps at home and abroad craft function curve and the technical data are on the file is on the premise of inlet water temperature of 15 ℃, the front has also introduced the water temperature below 15 ℃ or higher than the temperature influence coefficient calculation formula of gas.

3, the influence of the suction resistance

because of the gas exhaust opening often in downhole and away from the water ring vacuum pump ( Some coal mine up to several kilometers) , the suction pipe is too long, so should give full consideration to the suction resistance loss, can be calculated in the suction resistance calculation formula used in coal mine system, used in the piping thicker suction pipe, to reduce the resistance loss and minimize the right-angle bend, in order to improve the pump efficiency.

4, exhaust with micro positive pressure selection

some for pumping the gas emission in coal mine to the distant place or compressed into the storage tanks, exhaust pressure common in 0. 02 ~ 0. Between 5 MPa, G. Because water ring vacuum pump performance curve and the technical data of the technical documentation is under 1 standard atmospheric pressure exhaust pressure, when choosing a pump, exhaust pressure and pump cavity should be considered reflux increasing impact on pump discharge.

water ring vacuum pump in the fertilizer industry application especially phosphate fertilizer industry production is also the key support of the industry in the economic macro-control, because the new items and old enterprise on the technical reform of all above, the scale is given priority to, so large and super large water ring vacuum pumps have been applied in this also, such as a phosphate fertilizer enterprises in yunnan province a new was swept volume of 300 m3 / min of oversize water ring pump 3 units.

in addition, there are a lot of phosphate fertilizer enterprises technological requirements for absolute pressure in pressure during 80 ~ 100 hPa, still should have bigger extraction ability, and two stage water ring vacuum pumps and air ejector with two stage water ring vacuum pump used in this condition, it has unique advantages, many chemical fertilizer enterprises eliminated vibration noise and the reciprocating vacuum pump with higher vacuum degree, with two stage water ring vacuum pump replacement, and received good effect, can say two stage water ring vacuum pump will be more and more widely applied in the industry.

finished water ring vacuum pump model how to choose question understanding, if you need the water ring vacuum pump cavitation of common failures, please refer to related articles.

         

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