Roots vacuum unit self-cleaning cooling mechanism

Abstract

The invention discloses a self-cleaning cooling structure of a Roots vacuum unit, and the self-cleaning cooling structure is used for solving the internal corrosion problem and the over-temperature parking problem of the Roots vacuum unit. The structure comprises an impurity removal part, a gas supply unit and a gas exhaust pipeline, wherein the impurity removal part is fixedly connected with a gas inlet cavity of a Roots vacuum pump for filtering impurities in working gas; clean air is introduced in a parking process for scouring parts in the pump, so that cleaning and cooling are realized; the gas supply part is fixedly connected with a gas suction cavity of the Roots vacuum pump; during working, clean cold air is introduced into the gas suction cavity for scouring a rotor of the vacuum pump, so that cleaning and cooling are realized; and the gas exhaust pipeline is fixedly connected with a gas exhaust cavity of the Roots vacuum pump for conveying the working gas into a downstream vacuum container, so that gas flow is prevented from returning to the pump cavity during parking. The self-cleaning cooling structure disclosed by the invention can be applied to the vacuum unit for removing complex component gas by sucking, so that damages, on the vacuum unit, of corrosive gas are reduced; and meanwhile, the temperature of the vacuum unit is reduced, and the service life of the vacuum unit is prolonged.

Description

technical field [0001] The invention belongs to the application field of vacuum technology, and in particular relates to a self-cleaning and cooling technology of a Roots vacuum unit for extracting gases with complex components. Background technique [0002] Vacuum technology is widely used in various industries such as aerospace, mechanical electronics, non-ferrous metals, rare earth permanent magnets, and pharmaceutical manufacturing, which has promoted the progress of modern science and technology and the development of industry and agriculture. Roots vacuum unit is widely used as an important vacuum equipment. It has the advantages of high speed and small volume. After realizing air cooling, Roots vacuum unit can work continuously under high pressure without overheating. [0003] At present, the air-cooled Roots vacuum unit has been used in aerospace simulation experiments, and it undertakes the task of gas extraction in the arc heating wind tunnel system. The gas compos...

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Problems solved by technology

[0003] At present, the air-cooled Roots vacuum unit has been used in aerospace simulation experiments, and it undertakes the task of gas extraction in the arc heating wind tunnel system. The gas composition in the arc heating wind tunnel is complex, with water vapor, acid gas and various Dust, water vapor and acid gas form an acidic solution, corrode the components of the vacuum system, and form corrosion products. Corrosion products and various dust from the wind tunnel enter the vacuum unit and adhere to the rotor and cavity of the vacuum unit, reducing the vacuum unit. The pumping efficiency will destroy the vacuum of the system, increase the friction force, cause the temperature of the unit to rise and alarm, cause shutdown, and even directly block the rotor and cavity, causing mechanical damage to the vacuum unit

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