Working principle of water ring vacuum pump and the three stages of work _

work before the water pump water must be filled in with a certain amount of work is a necessary condition for water ring vacuum pump can work. After filling the water to the pump, when the impeller rotates, the water is driven to rotate, forming a clingy wall of water ring pump shell, inner surface yi with the impeller wheel surface and water ring on both sides of the cover face formed between a crescent-shaped work space. This space can be separated by the impeller blade chamber into several without feeling. The volume of the cavity with the impeller rotation will periodically becomes large and small. Obviously, when the chamber volume larger suction fluid, cavity volume change hours will squeeze and discharge fluid. Suction, compression and discharge of three stages of work and the water ring vacuum pump of a work cycle.

in conveying gas, for example:

1) Suction process

when between leaf turned right turn in this picture, as a result of the side outside the blade and the increasing distance between the water pump casing eccentricity, the liquid will be left between leaf, leaf chamber volume increases gradually, between the gas through side suction inhaled.

( 2) Compression process

when turned suction between the leaves begin to enter this turn left, because the pump casing and blade gradually narrowed the distance outside, outside impeller by circumferential direction of the flow of fluid flow will be in between. In this way, not with discharge between leaf, the gas was compressed.

( 3) Discharge process

when transferred to the mines with discharge between the leaf, the leaf is between the pressure in the chamber will be in an instant and discharge pressure balance, and in the process of the rotation of the impeller then, leaf outside the liquid into leaf between constantly, thus the gas discharge. Shows, the working principle of water ring vacuum pump and the vane water pump has a lot of similarities, which is entirely a matter of working chamber volume change to generate the inhale row, but both have important differences.

water ring vacuum pump stator is composed of a rotating water ring, and it is the water ring by the impeller to work formed by the kinetic energy of the water. The liquid water ring in the right hemisphere is in turn driven by impeller rotational and obtain a certain energy, and in the flow channel was dumped outside the leaf; And in turn it into the left after, can only rely on its got into leaf, between the motion of the compressed gas.

in this way, the impeller flow velocity of fluid will inevitably reduces with the increase of pressure. When the discharge pressure increases to a certain value, the speed of the impeller outer liquid will also fall to low, and so cannot be entered into between leaf of compressed gas. That is to say, the water ring vacuum pump during the compression stage of gas pressure can increase, entirely on work has won since the impeller convert the kinetic energy of the water.

as a result, water ring vacuum pump discharge pressure will not like other positive displacement pumps will be increased with the increase of discharge load to dangerous levels, the water ring vacuum pump's maximum working pressure ( When the discharge valve fitted pressure) Co. , LTD.

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