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Inorganic combined seal spacer and method for making same

A sealing gasket and inorganic composite technology, applied in the direction of mechanical equipment, separation methods, chemical instruments and methods, etc., can solve problems such as comprehensive performance limitations, and achieve excellent fixing effects

Active Publication Date: 2008-09-10
上海伊索热能技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the examples used in the market and reported in the literature are made by simply adding materials such as expandable minerals to the sealing gasket, and the comprehensive performance is limited to a certain extent.

Method used

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  • Inorganic combined seal spacer and method for making same
  • Inorganic combined seal spacer and method for making same
  • Inorganic combined seal spacer and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see figure 1 As shown in the schematic diagram of the sectional structure of the sealing gasket of the present invention applied in a catalytic converter, a kind of inorganic composite sealing gasket 2 is arranged between the automotive catalytic converter carrier 1 and the metal casing 3, and the sealing gasket 2. It consists of a composition including inorganic non-metallic fibers, expansive materials, and adhesives, wherein the inorganic composite sealing gasket is divided into eight width sections in the width direction, including section I, section II, and section III from left to right , Section IV, Section V, Section VI, Section VII and Section VIII; divided into three thickness layers from inside to outside, including inner layer 21, middle layer 22 and outer layer 23, each thickness layer and the liner in the width section The material components are the same or different.

[0040] Among the three thickness layers, the expandable material in the inner layer 21...

Embodiment 2

[0049] An inorganic composite sealing gasket, other structures are the same as in Example 1, except that the content of each component in the thickness layer and width section is different.

[0050] Among the three thickness layers, the expandable material in the inner layer 21 accounts for 35% of the total content of the expandable material in the entire sealing gasket 2, the middle layer 22 accounts for 35% of the total content, and the outer layer 23 Accounting for 30% of the total content; the distribution of the binder in the three thickness layers is: the inner layer 21 accounts for 40% of the total content, the middle layer 22 accounts for 20%, and the outer layer 23 accounts for 40% of the total content.

[0051] Wherein, the expansive material includes an expansive material with a low expansion start temperature, and in the three thickness layers, the proportion of the expansion material with a low expansion start temperature to the expansive material in the thickness ...

Embodiment 3

[0057] An inorganic composite sealing gasket, other structures are the same as in Example 1, except that the content of each component in the thickness layer and width section is different.

[0058] Among the three thickness layers, the expandable material in the inner layer 21 accounts for 50% of the total content of the expandable material in the entire sealing gasket 2, the middle layer 22 accounts for 30% of the total content, and the outer layer 23 Accounting for 20% of the total content; the distribution of the binder in the three thickness layers is: the inner layer 21 accounts for 38% of the total content, the middle layer 22 accounts for 24%, and the outer layer 23 accounts for 38% of the total content.

[0059] Wherein, the expansive material includes an expansive material with a low expansion start temperature, and in the three thickness layers, the proportion of the expansion material with a low expansion start temperature to the expansive material in the thickness ...

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Abstract

The invention provides an inorganic composite gasket and a preparation method thereof. The inorganic composite gasket comprises a compound which consists of an inorganic non-metallic fiber, an expansile material and bond, wherein, the inorganic composite gasket is divided into eight width sections in the width direction and is divided into three thickness layers from inside to outside; components of gaskets materials in each thickness layer and width section are the same or different, wherein, the expansile material in the three thickness layers have different contents, wherein, the inner layer occupies 33.3 to 50 percent of the total content, the intermediate layer occupies 30 to 40 percent of the total content, and the outer layer occupies 20 to 33.3 percent of the total content. The inorganic composite gasket has the advantages of breaking through the prior uniform gasket according to the requirement of the gasket in practical application to enable the components of the gasket to form asymmetrical distribution in the thickness direction and the width direction and meet the practical application requirement, and adopting a novel vacuum suction filtering technology to prepare the inorganic composite gasket with the method of composite molding, so that a product can achieve the excellent functions of fixing, sealing, heat insulating and sound-absorbing. The inorganic composite gasket can be applied to a catalytic converter of a motor vehicle.

Description

technical field [0001] The invention relates to an inorganic composite sealing gasket and a preparation method thereof, which are used for sealing and heat insulation between two components under high temperature conditions, and are especially suitable for fixing and sealing between a fuel vehicle catalytic converter carrier and a metal shell and insulation. Background technique [0002] In order to effectively control the pollution of automobile exhaust to the atmospheric environment, catalytic converters are often used to purify exhaust gases from internal combustion engines and other engines. Catalytic converters usually have the following structure: built-in honeycomb ceramic catalytic converter carrier, covered with a metal material shell, At the same time, in order to prevent exhaust gas from leaking out from the gap between the honeycomb ceramic carrier and the metal material shell, a sealing gasket to prevent gas leakage must be provided between the catalytic convert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28B01D53/34
CPCY02A50/20
Inventor 李军良张朝礼
Owner 上海伊索热能技术股份有限公司
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