A Roots Blower Rotor End Face Ring Sealing Structure

Abstract

The invention discloses an annular sealing structure for the rotor end face of the Roots blower, which includes sealing grooves respectively provided on the two end faces of the rotor of the Roots blower, and the sealing grooves are fitted with seals that slide out and reach the inner wall of the Roots blower housing. sealing strip. The invention relates to a Roots blower rotor end face annular sealing structure. When the Roots blower rotor rotates at high speed, the end face gap of the Roots blower automatically reaches the minimum value through the sealing strip that slides out, and the centrifugal force generated by the high-speed rotation of the rotor can be reduced. The integrated application of thermal expansion can effectively reduce the gas leakage between the end face of the rotor and the end face of the housing; at the same time, it has the characteristics of easy processing and replacement, which improves the reliability and efficiency of the Roots blower.

Description

technical field [0001] The invention belongs to the technical field of blower sealing devices, and in particular relates to an annular sealing structure on the rotor end face of a Roots blower. Background technique [0002] The Roots blower belongs to the volume rotary blower, which is a typical gas pressurization and conveying machine. , the installation method is flexible and changeable, the volumetric efficiency is high, and the transmission medium does not contain oil, etc., so it has been widely used in various industries of economic construction. Due to the relative movement between the Roots blower rotor and the end face of the housing, in order not to interfere or friction, there will be a gap between the end face of the rotor and the end face of the housing, which is called the axial gap. If the axial clearance is too small, it will cause wear on the end face of the housing and the end face of the rotor. At the same time, friction will generate heat, which will inc...

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Problems solved by technology

Among them, the "Roots blower rotor end face sealing structure" has a large amount of processing, and the service life of the rotor is seriously affected after the sealing strip is worn; "A Roots hydrogen circulation pump end face sealing structure for fuel cells" realizes partial sealing of the rotor end face , which reduces the gap leakage, but the unfilled area of ​​the rotor end surface forms a clearance volume, and there is still a lot of gas leaking from the high pressure area to the low pressure area during the rotation at different angles, and the sealing is simply achieved by simply staying in the packing method, and the high speed When the rotor rotates, its own centrifugal force is applied, and there is also a lack of consideration and application of the thermal expansion of the sealing strip, which cannot achieve a good seal on the rotor end face

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