Features of the three-stage air-cooled Roots vacuum pump,

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This post was last edited by foam_ZPTK on 2019-7-27 at 21:29. The characteristics of the three-stage air-cooled Roots vacuum pump include: fast startup, low power consumption, low operating and maintenance costs, high pumping speed and efficiency. It is not sensitive to small amounts of water vapor and dust present in the gas to be pumped. It has a high pumping rate within a pressure range of 100–1 Pa, and can quickly remove gases that are released suddenly. This pressure range falls exactly between oil-sealed mechanical vacuum pumps and diffusion pumps. Therefore, it is often connected in series between a diffusion pump and an oil-sealed mechanical vacuum pump to increase the pumping capacity in the intermediate pressure range. At this time, it is also called a mechanical booster pump. Roots vacuum pumps are used in vacuum metallurgy for processes such as smelting, degassing, and rolling, as well as in the chemical, food, and pharmaceutical industries for vacuum distillation, vacuum concentration, and vacuum drying. Vacuum pump accessories are used for reducing the noise generated by vacuum pumps, namely vacuum pump silencers. A gas-cooled Roots pump, also known as a Roots vacuum pump, is a variable-volume vacuum pump that features two lobed rotors rotating in opposite directions but synchronously within the pump; there are small gaps between the rotors as well as between the rotors and the inner walls of the pump casing, preventing direct contact between them. Rotary vacuum pumps have withstood long-term operation in various applications such as the petroleum, chemical, plastic, and pesticide industries, as well as in tasks related to the dynamic balancing of turbine rotors and in aerospace space simulation; therefore, they should be widely promoted and utilized in China. It is also used in industries such as petroleum, chemicals, metallurgy, and textiles. Vacuum pump accessories, acting as vacuum pump silencers, are used to control the noise generated by vacuum pumps. Air-cooled Roots vacuum pumps use cooling gas to directly cool the rotor, thereby reducing the rotor’s temperature as well as the temperature difference with the pump chamber and preventing excessive expansion of the rotor. This allows them to operate under high pressure differences and high compression ratios; as a result, they can be used alone at atmospheric pressure or in series to achieve a higher level of vacuum.