Brake cylinder sealing structure

Abstract

The invention relates to a brake cylinder sealing structure which comprises a piston assembly, an L-shaped seal ring and a circular pressure plate, and is characterized in that: the piston assembly comprises a piston and a piston rod; the piston is in a disc shape, and a circular bulge is arranged on the end surface of the bottom of the piston; studs which are equally distributed around the circular bulge are arranged on the end surface of the bottom of the piston in a circumferential shape; a round of grooves are arranged on the edges of the piston; the L-shaped seal ring comprises a circular bottom surface and a vertical side which is connected with the outer side of the bottom surface in 90 degrees; holes which correspond to and are matched with the studs are arranged on the bottom surface of the L-shaped seal ring and the circular pressure plate; and the L-shaped seal ring is fastened on the end surface of the bottom of the piston through the circular pressure plate and a nut. The brake cylinder sealing structure has the advantages that: no leak gap exists between the seal ring and the piston, so that the sealing performance of a brake cylinder is more reliable. A lightweight design is adopted, and the weight of the piston is reduced. While the sealing performance of the brake cylinder is improved, the interchangeability between the piston rod, a buffer spring, a push rod and other parts and existing brake cylinder accessories is ensured.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to a brake cylinder sealing structure for railway wagons. Background technique [0002] The brake cylinder for railway freight cars is one of the important parts of the railway vehicle braking system, and its performance directly affects the braking efficiency of the vehicle. The purpose of the brake cylinder is to change the air pressure into a part of the mechanical thrust through the action of the three-way valve, distribution valve or control valve. [0003] At present, there is a problem of brake cylinder leakage in the process of vehicle operation and maintenance, which causes the leakage brake cylinder to not brake, not maintain pressure or the piston of the brake cylinder cannot return to its position after relief. Analyze the reasons for the leakage of the brake cylinder, mainly in the following aspects: [0004] The first is to decompose the leaking brake cylinder, and...

AI Technical Summary

Problems solved by technology

This situation results in that after the piston reciprocates for a long time, the lip of the lower sealing ring of the piston has a large amount of compression, a large contact surface, and a large amount of wear. Reduced wear life premature failure

Especially when the piston is subjected to external force, it is easier to deflect to one side, which cannot ensure that the gap between the piston circumference in the cylinder is always consistent, and the sealing ring cannot achieve the ideal working sealing state.

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