Sealing assembly and dry vacuum pump

By designing sealing components with dynamic and static rings, using bent and roundabout fluid flow paths and expansion cavity, the existing sealing structure is solved, and a more efficient sealing effect is achieved and a wider range of application is achieved.

CN222783008UActive Publication Date: 2025-04-22INGERSOLL-RAND TECHNOLOGY R&D (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202420875168.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-24
Publication Date
2025-04-22
Estimated Expiration
2034-04-24

AI Technical Summary

Technical Problem

The existing sealing structure is single, with few comb teeth and limited sealing effect, which leads to an increase in the pump volume, an increase in production cost and a bulky structure, affecting installation and transportation.

Method used

A sealing assembly is designed, including a moving ring and a static ring. By providing a first outer ring, a first inner ring, a second outer ring, a second inner ring and an expansion cavity, a bent and rounded fluid flow path is formed, a fluid flow path is increased, and a combined seal between radial and axial directions is realized.

Benefits of technology

Under the same volume and shape, the number of expansion cavity is increased, the sealing effect is improved, the power and vacuum of the pump is increased, the production process is simplified, and the scope of application is expanded.

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Abstract

The utility model discloses a sealing assembly and a dry vacuum pump. The sealing assembly comprises a movable ring, a static ring and an expansion cavity. The moving ring is installed on a rotating shaft of the pump and rotates along with the rotating shaft. The movable ring comprises a first outer ring, a first inner ring and a first mounting groove, wherein the first outer ring and the first inner ring are arranged in parallel, and the first mounting groove is formed between the first outer ring and the first inner ring. The static ring comprises a second outer ring, a second inner ring and a second mounting groove, wherein the second outer ring and the second inner ring are arranged in parallel, and the second mounting groove is formed between the second outer ring and the second inner ring. Due to the arrangement of the structure, the movable ring and the static ring are arranged in an overlapped mode, then a bent and roundabout fluid flow channel is formed between the movable ring and the static ring, the flowing path of fluid is effectively lengthened, more expansion cavities can be formed under the same size and appearance, radial and axial combined sealing can be achieved, and the sealing performance is improved. And the sealing effect of the sealing assembly is effectively improved, so that the power and the vacuum degree of the pump set are obviously improved under the same working state.
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