Rotary sealing structure for central inflation and deflation system of vehicle portal bridge

By combining stationary components, rotating components, bearing components, and mirror-finished silicon carbide sealing components, the problems of pipe entanglement and sealing in the central inflation/deflation system of vehicle portal axles are solved, achieving reliable and long-lasting high-pressure gas delivery, adapting to harsh working conditions, and reducing maintenance costs.

CN122126030APending Publication Date: 2026-06-02BEIJING POTOU AIKE AUTOMOTIVE TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610544452.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-23
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The existing central inflation/deflation system for vehicle portal axles is prone to tangling during axle rotation, and its sealing structure cannot simultaneously meet the requirements of zero leakage of high-pressure gas and low rotational resistance. Furthermore, it suffers from poor reliability under harsh operating conditions and high maintenance costs.

Method used

The design employs a combination of stationary components, rotating components, bearing components, and mirror silicon carbide sealing components. This includes the coaxial arrangement of the stationary and rotating components, the dynamic and static fit of the mirror silicon carbide sealing ring, and the support and pre-tightening structure provided by the bearing components, thereby achieving high-pressure gas sealing and preventing entanglement.

Benefits of technology

It achieves entanglement-free high-pressure gas delivery, zero-leakage sealing, low rotational resistance, long service life, adaptability to harsh working conditions, high reliability, and convenient installation and maintenance.

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Abstract

The invention belongs to the field of off-road vehicle chassis gas circuit sealing, and particularly relates to a rotary sealing structure for a vehicle gate-type bridge central inflation and deflation system, which comprises a static part, a rotary part, a bearing part and a pair of mirror silicon carbide sealing parts in dynamic and static fit, the static part and the rotating part are coaxially arranged, and a through central air hole is formed in the static part and used for compressed air to pass through; the bearing component is arranged between the static component and the rotating component and used for supporting the rotating component to rotate freely relative to the static component. The mirror surface silicon carbide sealing component comprises a static ring and a movable ring, the static ring is fixed to the static component, the movable ring is fixed to the rotating component, and the mirror surface end faces of the static ring and the movable ring are attached to each other to form a gas sealing face. Pipeline torsion and fracture are avoided, and system reliability is improved.
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