Gasket for metal ceramic catalytic converter

Abstract

The invention discloses a gasket for a metal ceramic catalytic converter, which comprises a metal fiber layer and a vermiculite fiber layer, wherein the metal fiber layer and the vermiculite fiber layer are connected through organic bonding agents in a compound manner; the metal fiber layer and the vermiculite fiber layer are connected in a compound manner to form a strip-shaped structure; a lug is formed at one end of the connection of the metal fiber layer and the vermiculite fiber layer, and a groove is formed in the other end of the connection of the metal fiber layer and the vermiculite fiber layer; the lug, the groove and the connection of the metal fiber layer and the vermiculite fiber layer are formed integrally; the metal fiber layer is made of metal fibers and metal which are combined through the organic bonding agents; and the vermiculite fiber layer is made of fibers and vermiculites, and the fibers and the vermiculites are combined through the organic bonding agents. The gasket for the metal ceramic catalytic converter meets the requirements of low initial expansion temperature, high-temperature resistance, high tensile breaking strength, good flexibility, excellent sealing fixation effect and the like, can achieve the protective effect of preventing the catalytic converter from being influenced by impact, vibration and the like caused by uneven road, braking and the like, and can also achieve the functions of heat insulation, acoustic insulation and sealing.

Description

Technical field [0001] The invention relates to a diesel engine vehicle, in particular to a metal ceramic catalyst liner at the rear of the vehicle. Background technique [0002] At present, the environmental problems caused by automobile exhaust emissions have attracted more and more attention from countries all over the world. my country has also implemented 3 emission standards since 2008. Automobile exhaust gas treatment is completed by catalytic converters. The structure of the catalytic converter includes catalyst, carrier, and lining. It is composed of essential parts such as pad and shell. The gasket is one of the key components of the catalytic converter. It uses the high temperature expansion of the engine exhaust to prevent deformation of the catalytic converter due to thermal expansion and contraction during operation, and it can also protect the catalytic converter from uneven roads, brakes, etc. The impact and vibration caused by the cause also play a role in heat i...

AI Technical Summary

Problems solved by technology

However, the initial expansion temperature of ordinary liners used in my country's catalytic converters is about 400 degrees, and the expansion force is large, which is suitable for wrapping standard carriers and is generally used in automobile gasoline engines. Gasoline engine is much lower. At this time, if the ordinary liner is used, because the initial expansion temperature cannot meet the requirements, the expansion of the liner will fail, and the protective effect on the catalyst cannot be achieved above.

At this time, if a single-layer mechanism liner made of a material with a low initial expansion temperature is used, there will be defects such as low tensile strength and poor flexibility, which will lead to defects such as the liner being unable to be packaged during use.

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