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Sealing structure

A sealing structure and sealing ring technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of reducing friction, poor wear resistance, poor sealing effect, etc., to improve wear resistance and use. Longevity, improved stability and reliability, effect of preventing mutual rotation

Inactive Publication Date: 2015-03-25
JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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AI Technical Summary

Problems solved by technology

The sealing structure of the rubber O-ring seal has the disadvantages of high friction and poor wear resistance. Special tools are required during the assembly process and the seal ring is likely to be cut. The sealing performance of the seal ring decreases at the extreme operating temperature.
The sealing structure using fluoroplastic sealing ring can effectively reduce friction, improve wear resistance, reduce the probability of assembly cuts, and improve the temperature resistance range of the sealing structure, but the sealing ring realized by fluoroplastic sealing ring through its own elastic deformation The effect is poor, it needs to provide radial preload to realize the sealing function

Method used

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Embodiment Construction

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0017] A sealing structure includes a piston rod 1, a wave spring 2, two sealing rings 3, and a pin 4. In the design of the sealing ring, except for the cutout, the rest surface roughness should be better than Ra=0.8. The quality of wave springs shall be verified by tests. During the installation process, ensure that the pin 4 is supported at the opening of the wave spring, and check whether the two notches of the sealing ring are effectively staggered by 180°. In order to further ensure the sealing effect of the sealing ring, the assembled components can be put together in an oven at a certain temperature to shrink the sealing ring.

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Abstract

The invention provides a sealing structure. A wavy spring (2) is mounted at the bottom of a sealing groove of a piston rod (1). Two sealing rings (3) are mounted outside the wavy spring (2). Each sealing ring (3) is provided with a cut. The sealing structure has the advantages that the wavy spring at the bottom of the sealing groove of the piston rod provides pretightening force for the two fluoroplastic sealing rings to enable the sealing rings to fit an inner hole of a matched part, so that a sealing function is achieved; by the structure, frictional force generated during axial reciprocating of the piston rod can be reduced effectively.

Description

technical field [0001] The invention belongs to the field of hydraulic engineering and relates to a sealing structure. Background technique [0002] The traditional I-type hydraulic sealing method generally uses a rubber O-ring to fill the sealing groove through the elastic deformation of the sealing ring to achieve the sealing effect. The sealing structure using rubber O-rings has the disadvantages of high friction, poor wear resistance, special tools are required during assembly, and the sealing ring is likely to be cut, and the sealing performance of the sealing ring decreases under extreme operating temperatures. The sealing structure using fluoroplastic sealing ring can effectively reduce friction, improve wear resistance, reduce the probability of assembly cuts, and improve the temperature resistance range of the sealing structure, but the sealing ring realized by fluoroplastic sealing ring through its own elastic deformation The effect is poor, and it needs to provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/18
CPCF16J15/18
Inventor 张鹏飞丁志伟姬伟
Owner JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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