Dual-layer compound seal blocking mechanism

A double-layer composite, plugging disk technology, applied in the direction of engine sealing, fluid tightness testing, machine/structural component testing, etc. Achieve the effect of improving flexibility, large renovation space, and cost reduction
CN105485342AActive Publication Date: 2016-04-13SHANGHAI AUTOMOBILE GEAR WORKS +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI AUTOMOBILE GEAR WORKS
Publication Date
2016-04-13

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Abstract

The invention belongs to the technical field of gearbox housing seal tests, and relates to a dual-layer compound seal blocking mechanism. The blocking mechanism is arranged in a blocking hole and specifically comprises a clamping oil cylinder component, a blocking plate, an upper blocking disc, a lower blocking disc and a middle disc. The clamping oil cylinder component and the upper blocking disc are fixedly connected, and the blocking plate is arranged between the clamping oil cylinder component and the upper blocking disc. The upper blocking disc, the lower blocking disc and the middle disc are in interference fit and are provided with seal rings and elastically connected. During clamping, automatic sealing of the blocking hole can be achieved by means of pushing of an oil cylinder and compressing of the seal rings, automatic reset can be achieved through a balance spring during releasing, cost is reduced, and the flexibility of a machine tool is improved.
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Description

technical field

[0001] The invention relates to a technique in the field of transmission housing seal testing, in particular to a double-layer composite seal sealing mechanism. Background technique

[0002] In the air tightness test of the gearbox casing, the holes on the casing are all sealed with end faces. For holes with a diameter of more than 300mm, or when there are openings on the inner surface of the hole, the use of end face sealing technology can no longer meet the requirements of air tightness testing. Therefore, it is necessary to design a sealing mechanism with a simple structure, so that it can not only meet the sealing requirements, but also be easy to maintain and replace the seal.

[0003] After searching the prior art, it was found that Chinese patent document number CN103759006A, published (announcement) date 2014.04.30, discloses an internal expansion sealing device for camshaft holes, including a pull rod, a rear end inner sleeve, an inner sleeve, Fron...

Claims

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