Flat-face flange sealing gasket for automotive exhaust system

Abstract

The invention discloses a flat-face flange sealing gasket for an automotive exhaust system, which comprises an upper piece and a lower piece, which have the same shape and are overlapped and welded into a whole; through holes of the same size as the central hole of a flat-face flange of an exhaust pipe connector are formed in the middle of the upper piece and the lower piece; bosses are punched around the through holes on different sides of the upper piece and the lower piece respectively; the bosses form a sealing zone the flat-face flanges; furthermore, positioning pawl sheets are uniformly distributed on the outer circumference of the upper or lower piece of the sealing gasket. The structure of the gasket is simple and smartly designed and the punched bosses ensures the reliability of sealing, so the gasket better meet the requirements of increasingly strict laws and regulations; the uniformly distributed pawls make the installation of the gasket easy and positioning of the gasket accurate; and the up and down two layer structure helps to save soft material such as graphite or mica sheets used in the conventional gasket, and the gasket can be manufactured easily at low cost.

Description

technical field [0001] The invention relates to an automobile engine exhaust system, in particular to a flat flange sealing gasket of the automobile exhaust system. Background technique [0002] With the rising cost of automobile manufacturing and increasingly stringent regulations on fuel consumption and environmental protection, how to reduce the cost of automobile manufacturing, how to ensure the sealing of the exhaust system and meet the requirements of environmental protection have attracted more and more attention. In the past, the flat flange gasket of the exhaust system had insufficient sealing and low assembly precision, and mostly used a three-layer structure, that is, the upper and lower layers were made of stainless steel sheets, and the middle was made of flexible materials such as graphite or mica. The manufacturing process of the entire gasket was complicated. , leading to the disadvantages of high cost of gasket materials and manufacturing. Contents of the ...

AI Technical Summary

Problems solved by technology

In the past, the flat flange gasket of the exhaust system had insufficient sealing and low assembly precision, and mostly used a three-layer structure, that is, the upper and lower layers were made of stainless steel sheets, and the middle was made of flexible materials such as graphite or mica. The manufacturing process of the entire gasket was complicated. , leading to the disadvantages of high cost of gasket materials, manufacturing, etc.

Images