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Method for measuring expansibility of catalytic converter seal gasket

A catalytic converter and sealing gasket technology, applied in the direction of material thermal expansion coefficient, etc., can solve the problems of different, no statutory tools and detection methods for catalytic converter sealing gasket detection, large risks, etc.

Inactive Publication Date: 2014-08-06
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

[0004] Due to the different types and models of automobiles, the specifications and types of catalytic converters are different, resulting in different gaps between the honeycomb ceramic carrier and the metal shell; to make the catalytic converter sealing gasket achieve the ideal effect of sealing, fastening and shock absorption, It is necessary to strictly control the thermal expansion of the sealing gasket, so that it can meet the strict sealing effect after thermal expansion, and make the peak expansion force less than the maximum back pressure that the ceramic carrier can withstand, so as to avoid the system failure mode of the ceramic carrier being crushed ;Because there is no national standard or industry standard for catalytic converter sealing gaskets, and there are no statutory tools and testing methods for the detection of catalytic converter sealing gaskets, packaging companies mostly operate based on experience, so there are relatively large risks in actual use

Method used

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  • Method for measuring expansibility of catalytic converter seal gasket
  • Method for measuring expansibility of catalytic converter seal gasket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Sampling, select a piece of 100×100mm expansion sealing gasket with a grammage of 3662g / m2 and a thickness of 5.4mm;

[0039] (2) Make a sample, use a die-cutting die to punch the intumescent sealing gasket into a test sample with a diameter of 11mm, and mark it as a 1# sample;

[0040] (3) Place the sample, place the 1# sample under the movable end of the quartz glass rod in the thermal expansion analyzer, and provide a pressure of 1345g above the quartz glass rod;

[0041] (4) Sample data detection. After the sample is placed, calibrate the zero position of the thermal expansion analyzer, then turn on the heating switch of the heating device in the thermal expansion analyzer, and raise the temperature at a heating rate of 15 / min until it reaches 750°C. The recording instrument in the mechanical analyzer records the data measured for the first time in the form of a schematic diagram of thermal expansion curve; when the temperature drops to room temperature, continu...

Embodiment 2

[0044] (1) Sampling, the selected gram weight is 4070g / m 2 , a piece of 100 × 100mm intumescent sealing gasket with a thickness of 6.02mm;

[0045] (2) Make a sample, use a die-cutting die to punch the intumescent sealing gasket into a test sample with a diameter of 11mm, and mark it as a 2# sample;

[0046] (3) put the sample, the 2# sample is placed below the movable end of the quartz glass rod in the thermal expansion analyzer, and a pressure of 1345g is provided above the quartz glass rod;

[0047] (4) Sample data detection. After the sample is placed, calibrate the zero position of the thermal expansion analyzer, then turn on the heating switch of the heating device in the thermal expansion analyzer, and raise the temperature at a heating rate of 15 / min until it reaches 750°C. The recording instrument in the mechanical analyzer records the data measured for the first time in the form of a schematic diagram of thermal expansion curve; when the temperature drops to room te...

Embodiment 3

[0050] (1) Sampling, the selected gram weight is 5200g / m 2 , a piece of 100×100mm expandable sealing gasket with a thickness of 7.65mm;

[0051] (2) Make a sample, use a punching die to cut the expansive sealing gasket into a test sample with a diameter of 11mm, and mark it as a 3# sample;

[0052] (3) put the sample, the 3# sample is placed below the movable end of the quartz glass rod in the thermal expansion analyzer, and a pressure of 1345g is provided above the quartz glass rod;

[0053] (4) Sample data detection. After the sample is placed, calibrate the zero position of the thermal expansion analyzer, then turn on the heating switch of the heating device in the thermal expansion analyzer, and raise the temperature at a heating rate of 15 / min until it reaches 750°C. The recording instrument in the mechanical analyzer records the data measured for the first time in the form of a schematic diagram of thermal expansion curve; when the temperature drops to room temperature,...

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Abstract

The invention discloses a method for measuring expansibility of catalytic converter seal gasket. The method comprises the following steps: (1) sampling; (2) preparing test samples; (3) placing the samples: the test samples are placed under the movable end of a quartz glass rod in a thermal expansion analyzer and pressure of 1345 g is provided above the quartz glass rod; (4) then switching on a heating switch of a heating device in the thermal expansion analyzer and heating at the heating speed of 15 / min until the temperature reaches 750 DEG C; recording primary measuring data by a recorder in a thermal mechanical analyzer; when the temperature is reduced to the indoor temperature, heating continuously, controlling the temperature between 200 DEG C and 700 DEG C and conducting the circulation test for 50 times; after the circulation is over, the thermal expansion analyzer is automatically closed by the system and the samples are taken out after the temperature the device is reduced naturally; recording the data measured for 50 times by the recorder in the thermal expansion analyzer; (5) calculating thermal expansion performance parameters. The measuring method provided by the invention is simple, convenient and high in precision.

Description

technical field [0001] The invention relates to a method for detecting thermal expansion, in particular to a method for measuring the expansion of a sealing liner of a catalytic converter. Background technique [0002] With the enhancement of social environmental awareness, people pay more and more attention to the control of air pollution, especially the control of automobile emission pollution. With the development of urbanization in my country and the increase of automobile ownership, automobile exhaust has become the main source of urban air pollution It has become the consensus of all sectors of society to take strict measures to minimize vehicle emission pollution. [0003] Catalytic conversion technology is currently the main means to effectively control automobile exhaust pollution. Its function is to convert harmful gases in exhaust gas into non-polluting gases after catalytic conversion, and the catalytic converter system is an important part of the entire process; ...

Claims

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Application Information

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IPC IPC(8): G01N25/16
Inventor 张朝礼张广
Owner 上海伊索热能技术股份有限公司
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