Water ring vacuum pump cavitation in the state of a short time work, will cause the pump noise, vibration becomes larger, and even cause damage to the pump, and therefore should prevent the water ring vacuum pump in cavitation operation. So, what are the measures to prevent water ring vacuum pump cavitation? And Xiaobian take a look at the following content now! Water ring vacuum pump cavitation how to do? Water ring vacuum pump cavitation prevention methods 1, increasing the water heat because the vacuum pump ice water temperature will lead to a significant increase in its pumping, vacuum pump sealing water temperature must be lower than the steam pressure corresponding to the saturation heat, or Will make the vacuum better, but also lead to cavitation erosion of the vacuum pump impeller. Thus raising the heat of the water to prevent cavitation motivation. 2, popularization and selection of the correctness of the operation of the vacuum pump in the insurance area in the selection phase, the choice of vacuum suction pressure and water heat should be large amount of vacuum pump to avoid cavitation pressure scale, that is to prevent the vacuum pump in the critical vacuum or Critical discharge pressure of the sea operation, heavy volume increase the production of cavitation. 3, the device cavitation shield tube device with a cavitation shield tube of the vacuum pump, cavitation bubble generated in the middle of the rupture within the compression, the introduction of high pressure from the inside of the non-condensable gas can be promptly due to the emergence of bubble rupture Space, that can greatly increase the hazards of the pump on the pump and increase the noise caused by cavitation and vibration. Some pumps have a cavitation shield interface, such as operating at ultimate pressure, opening the cavitation shield connection (or coupling with a soda filter) to remove cavitation noise and to continue with the pump while maximizing inspiratory motivation cover. 4, with the atmosphere jet ejector role is the use of atmospheric pressure absolute vacuum pump pressure, resulting in jet of air in the ejector than the vacuum pump lower suction pressure to eliminate the vacuum pump ultimate pressure to prevent vacuum pump cavitation, Play a role in shielding the vacuum pump. Because the atmospheric ejector is designed to prevent cavitation of the vacuum pump and cover the vacuum pump, a vacuum pump normally equipped with an atmospheric ejector is preferable in that the vacuum formed by the suction is better than that not provided. \ 5, the lower saturated steam liquid as the working fluid to the working fluid from the original water to transformer oil, the ultimate vacuum due to low saturated vapor pressure of the oil lost higher promotion. In the removal of large gas purification and in some extraordinary occasions, the working fluid of the vacuum pump can also be used other liquids (available propanol, ethanol, xylene, aniline, such as amphetamine hydrochloride viscosity lower organic solvents) , The ultimate vacuum is determined by the saturated vapor pressure of the working fluid. The oil ring vacuum pump can work at 20 ~ 90 ℃, so it can not easily be emulsified due to the high temperature of the oil when the steam is removed due to the high temperature of the oil, so the oil can not easily be emulsified, thus popularizing the service life of the pump oil. The use of organic solvents as a working fluid, should pay attention to whether the explosion-proof motor, the vacuum pump and seal erosion problems. 6, the pump impeller, disc and other anti-cavitation to adopt the information on the contrary, the anti-cavitation power has a very clear distinction. Information on the anti-erosion power of the composition of a lot of information, there is usually high hardness and high elasticity of anti-erosion power is stronger. Overseas recommended low-carbon chromium-nickel alloy steel, such as 13Cr4N as a cavitation in the operation of hydraulic machinery, there is better anti-corrosion properties. Compared to the impeller coating steps rarely used, non-metallic coatings coated with epoxy resin, nylon powder, polyurethane and so on. Nominal surfacing alloy or spray alloy in the runway to prevent cavitation damage has also been given certain motives, such as stainless steel wire welding method, stainless steel plate engraving repair method written, alloy powder spray. Non-metallic and non-metallic alloys (including stainless steel) compared to the number of steps, non-metallic coatings in the form of economy, but should be mastered in its operating procedures to prevent coating shedding. Adoption of alloy powder welding motivation but high profits, and some central may no longer continue. Summary: cavitation vacuum pump vacuum pump is a common failure, any vacuum pump will have cavitation. In the daily life of brick and tile enterprises, doing a good job of the fundamental protection of facilities, there is a vague awareness of the vacuum pump cavitation, and proper steps to prevent cavitation, will certainly be able to achieve the goal of aggravating the vacuum pump cavitation. (Editor: Li Juan) Recommended reading: 2016 second session of the Internet and Industrial Integration Innovation Summit
Drywall screws (sometimes called sheetrock screws) provide a stronger hold, but cost a bit more than nails. These usually feature a Phillips head. Coarse drywall screws feature coarse threads to secure gypsum boards to studs. Fine drywall screws feature smaller heads and are used to secure drywall to metal studs..
Drywall screws have deeper threads than regular screws, which prevents them from dislodging easily from the drywall. They are made of steel and require a power screwdriver to drill them into the drywall. ... W-type screws, on the other hand, are longer and thinner. They are designed for installing drywall onto wood.
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