Prevent 2 bv water ring vacuum pump cavitation method

cavitation phenomenon is caused by the liquid. Liquid molecules escape into a gas molecule, which is called the 'evaporation'. Water ring vacuum pump cavitation occurred after, not only destroys the flow components, also can produce noise and vibration, resulting in a decline in the performance of the pump. In serious cases, it will stop the pump in the liquid, so that it is not work properly. 2 bv water ring vacuum pump running in cavitation condition for short periods of time, this will cause the noise and vibration of the pump, even cause damage to the water pump. So how to prevent the water ring vacuum pump cavitation? Small make up today and summarizes the following for everyone, for reference only!

to improve the heat of the water

with the increase of 2 bv water ring vacuum pump water temperature, water ring vacuum pump pumping energy will increase seriously. The quantity of heat of water ring vacuum pump seal water must be below corresponds to the exhaust pressure of saturated heat, otherwise will cause the water ring vacuum pump impeller cavitation. Therefore, the purpose of preventing cavitation is to increase the quantity of heat of water.

right

in the selection phase, when choosing 2 bv water ring vacuum pump suction pressure and the heat of the water, should as far as possible to avoid water ring vacuum pump cavitation occurs easily pressure range, which should prevent water ring vacuum pump running in the area of the critical vacuum or critical exhaust pressure, in order to avoid serious corrosion of the steam. Cavitation shielding pipe

2 bv with cavitation shielding tube water ring vacuum pump, compression puffing corrosion burst the bubble, and the introduction of high pressure of the non-condensable gas from within, can in time complement the space bubble burst, it can greatly increase the steam serious corrosion damage to pump, increase the noise and vibration caused by cavitation. Air ejector

air ejector function is the use of the differential pressure between the atmospheric pressure and water ring vacuum pump air jet, make the injector in the suction pressure is lower than the water ring vacuum pump, thereby eliminating the limit of water ring vacuum pump pressure, prevent water ring vacuum pump cavitation, have the effect of blocking water ring vacuum pump. Due to set the air ejector is to prevent the water ring vacuum pump cavitation and blocking water ring vacuum pump, so usually equipped with air jets of water ring vacuum pump water ring vacuum pump is better than no air ejector.

using low saturated vapor liquid as working fluid

working fluid from water into transformer oil, as a result of oil saturation vapour pressure is low, its high ultimate vacuum lost ascension. At the pump and the larger gas purification, work in some special occasions, water ring vacuum pump of the working fluid can also use other liquids ( Low viscosity organic solvents, such as propylene glycol, hydrochloric acid, ethanol, xylene, aniline diethylpropion, etc. ) 。 ) And the ultimate vacuum is determined by the working fluid saturated vapor pressure.

pump impeller and disc made of strong cavitation resistance materials

cavitation resistance of different materials are obviously different. Influence the composition of the material corrosion resistance, high hardness and elasticity of the material usually has strong corrosion resistance. In addition, it is recommended to use low-carbon nickel chromium alloy steel ( Such as 13 cr4n) As the material under the condition of cavitation operation of hydraulic machinery, and has good corrosion resistance. The impeller of the coating process is relatively small. Epoxy resin, polyurethane, nylon powder, etc. Non-metallic coating used. The purpose of preventing cavitation damage can also be through the port of surfacing welding alloy or spraying alloy, such as stainless steel wire welding method, stainless steel plate welding repair method and alloy powder spray welding.

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