High-pressure dynamic sealing structure applicable to gearbox

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...

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

Images