The water ring vacuum pump is a bladed impeller eccentrically mounted in a water-filled pump casing. The impeller rotates in the pump casing to form a water ring, which acts as a piston, and relies on a vacuum pump that changes the volume to extract air to form a vacuum. It can be seen that the water ring vacuum pump is for gas removal, not liquid.
If the water ring vacuum pump is used as a liquid conveying machine, the liquid in the pump cavity of the water ring vacuum pump will not be removed in time, resulting in excessive pressure in the pump cavity, resulting in motor overload, motor phase loss, blocked exhaust and other components dragged by the impeller.
If it is necessary to pump water vapor and water through water ring vacuum pump in the actual application process, a pre separator shall be arranged between the water ring vacuum pump and the heat exchanger, so as to separate gas and water, and then achieve the purpose of vacuum negative pressure pumping.
The water ring vacuum pump is to complete the air extraction work by the internal water ring and the blade. It is widely used in many industries because of its good working efficiency, but we can not only see its working efficiency, because many gases can not be extracted, then we will introduce what gases can be extracted by the water ring vacuum pump.
1. Gas produced in the vacuum system process of water ring vacuum pump
It includes the gases released by materials in the process and the gases introduced for the process, and the gases evaporated by liquid or solid in the vacuum system.
2. The original atmospheric gas in the vacuum system of water ring vacuum pump
In the vacuum system of water ring vacuum pump, the vacuum vessel chamber and vacuum pipeline originally contain a certain amount of atmospheric gas. In the early stage of air extraction, they are the main gas load of the vacuum system, and they are also extracted by the system first.
3. Leakage gas in vacuum system of water ring vacuum pump
The leakage gas includes the air leakage into the vacuum system through the connection of vacuum seal and various leakage channels.
4. Gas released by desorption on the surface of materials in the vacuum system of water ring vacuum pump
The material surface in the vacuum system of water ring vacuum pump under normal pressure will absorb and dissolve some gases. Under negative pressure, this part of gas will be released again. Its outgassing flow is related to material performance, treatment process and material surface state.
5. Air penetrating into water ring vacuum pump system through wall material
The gas will dissolve and permeate in the solid. Therefore, the atmosphere will permeate part of the gas into the vacuum system through the structural material of the wall of the water ring vacuum pump.
In addition to all kinds of gases produced in the working process, the gases extracted by the water ring vacuum pump also include the original air in the system and the gases infiltrated in the atmosphere. These gases can be discharged through the work of the water ring vacuum pump, so as to improve the working efficiency.