High-pressure dynamic sealing structure applicable to gearbox

A dynamic seal structure and gear box technology, applied in the direction of engine seals, belts/chains/gears, engine components, etc., can solve problems such as seal failure and decrease in axial pressure bearing capacity.

Pending Publication Date: 2019-04-12
NANJING HIGH SPEED GEAR MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the movement of the piston, the O-ring is subject to tangential forces, and there is a risk of distortion and being squeezed into the gap between the piston and the cylinder, resulting in seal failure
[0003] The pressure plate of a traditional gearbox may move when subjected to axial pressure, resulting in a decrease in the axial pressure bearing capacity

Method used

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  • High-pressure dynamic sealing structure applicable to gearbox

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Embodiment approach

[0024] As a specific implementation manner, the combined sealing ring 103 for holes includes: a star-shaped sealing ring for holes and two sealing baffles for holes. The shaft combined sealing ring 104 includes: a shaft star-shaped sealing ring and two shaft sealing baffles. More specifically, the bore sealing star is positioned between two bore sealing baffles. The shaft star seal is located between the two shaft seal baffles.

[0025] Star rings for bores have lower friction than O-rings, reducing the risk of distortion. The two hole sealing baffles clamp the hole star-shaped sealing ring from both sides, thereby reducing the risk that the hole combined sealing ring 103 is squeezed into the gap between the piston 101 and the cylinder body 102 .

[0026] Star rings for shafts have lower friction than O-rings, reducing the risk of deformation or twisting. The two shaft seal baffles clamp the shaft star seal ring from both sides to reduce the risk of the shaft combined seal ...

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Abstract

The invention discloses a high-pressure dynamic sealing structure applicable to a gearbox. The structure comprises a piston, a cylinder block, a hole-purpose combined seal ring, a shaft-purpose combined seal ring, a pressure plate used for limiting the axial position of the piston, a combined spring, a hole-purpose circlip used for limiting the axial position of the pressure plate, and a baffle used for pressing the hole-purpose circlip so as to stop deformation of the hole-purpose circlip. The piston moves relative to the cylinder block; a piston cavity is formed between the piston and the cylinder block; the ole-purpose combined seal ring and the shaft-purpose combined seal ring are mounted between the piston and the cylinder block and located on the two sides of the piston cavity correspondingly; the hole-purpose circlip is mounted on the cylinder block; the hole-purpose combined seal ring comprises a hole-purpose start-shaped seal ring body and two hole-purpose sealing baffles; andthe shaft-purpose combined seal ring comprises a shaft-purpose star-shaped seal ring body and two shaft-purpose sealing baffles. The high-pressure dynamic sealing structure applicable to the gearboxis high in sealing performance and high in axial force bearing capacity.

Description

technical field [0001] The invention relates to a gear box, in particular to a high-pressure dynamic sealing structure of the gear box. Background technique [0002] In the dynamic sealing structure of the traditional gearbox, the sealing groove is processed on the outer circle of the piston, and the O-ring is assembled. The O-ring is deformed by the extrusion of the cylinder body and the piston, and acts as a dynamic seal on the axial stroke of the piston. During the movement of the piston, the O-ring is subject to tangential forces, and there is a risk of twisting and being squeezed into the gap between the piston and the cylinder, resulting in seal failure. [0003] The pressure plate of a traditional gearbox may move when subjected to axial pressure, resulting in a decrease in the axial pressure bearing capacity. Contents of the invention [0004] The invention provides a high-pressure dynamic sealing structure suitable for gear boxes with high sealing performance an...

Claims

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Application Information

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IPC IPC(8): F16H57/029F16J15/3268
CPCF16H57/029F16J15/3268
Inventor 蔡志明张宗海王诚李荃王德申
Owner NANJING HIGH SPEED GEAR MFG
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