The sealing method and structure of the upper nipple of the low temperature resistant air spring

Abstract

The sealing method and structure of the upper mouth of the low temperature resistant air spring, including the upper cover plate, the retaining ring, the connecting bolts connecting the upper cover plate and the retaining ring, and the upper mouth of the air bag, and the upper mouth is compressed between the upper cover plate and the retaining ring , the retaining ring and the connecting bolts are arranged on the radially outer side of the upper sub-mouth, the capsule connected to the upper sub-mouth fits along the inner wall of the buckle, and a sealing rubber ring is set between the upper cover plate and the buckle ring, and the The radial position of the sealing rubber ring is set between the upper sub-mouth and the connecting bolt and is radially separated from the upper sub-mouth and the connecting bolt. The sealing rubber ring forms an interference compression between the upper cover plate and the retaining ring, so that the The upper sub-port is sealed to the outside. The invention prolongs the path of air leakage between the upper cover plate and the buckle ring, forms multiple sealing protections, and improves the sealing reliability of the upper spigot of the air spring. The sealing rubber ring is vulcanized in the buckle, and integrated with the buckle to facilitate the smooth and precise pressing of the sealing rubber ring into the groove of the upper cover, improving the convenience and accuracy of assembly.

Description

technical field [0001] The invention relates to a sealing method and structure for an upper slit of a low-temperature-resistant air spring, which realizes effective sealing of the air spring under low-temperature conditions. Background technique [0002] The sealing of the upper mouth of the air spring for rail transit mainly relies on installing and fixing the upper mouth of the airbag between the upper cover plate and the buckle through a certain number of screws. The purpose of compressing the slit rubber on the air bag is achieved by the tightening force exerted by the screw, thereby realizing the sealing performance of the slit on the air spring. [0003] 1) CN109944894A patent discloses a sealing structure, method and product for the upper slit of a low-temperature resistant air spring. The sealing structure of the upper spigot of the low temperature resistant air spring includes an upper cover plate, a retaining ring, a connecting bolt and an upper spigot. The radia...

AI Technical Summary

Problems solved by technology

However, the silicone rubber O-ring is a split design, which can easily cause assembly errors that are difficult to detect during assembly, resulting in assembly gaps and air spring leakage

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