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Test method for thermal insulation performance of vacuum high temperature thermal protection products

A technology of thermal insulation performance and testing method, which is applied in the field of thermal insulation performance testing of vacuum high-temperature thermal protection products, and can solve problems such as large dispersion of temperature rise time, inaccurate test results, measurement equipment and measurement process interference, etc.

Active Publication Date: 2019-07-19
深圳申成科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that there is a large difference in temperature rise time in the process of testing the thermal insulation performance of the thermal protection layer, and the technical problems of inaccurate test results due to the interference of the measurement equipment and the measurement process, and provides a vacuum high temperature thermal protection Product thermal insulation performance test method

Method used

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  • Test method for thermal insulation performance of vacuum high temperature thermal protection products
  • Test method for thermal insulation performance of vacuum high temperature thermal protection products
  • Test method for thermal insulation performance of vacuum high temperature thermal protection products

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specific Embodiment approach 1

[0029] Specific implementation mode 1: In this implementation mode, the test method for the thermal insulation performance of vacuum high-temperature thermal protection products is carried out according to the following steps:

[0030] After the protected product is covered with a thermal protection layer, the vacuum degree is 7×10 -3 Pa, set the first temperature measuring point T on the outside of the protective layer 1 , set the second temperature measuring point T on the inner side of the protective layer 2 , make the first temperature measuring point T by heating 1 The temperature reaches at least 500°C, and after heating for a period of time, it reaches a steady state of heat flow, and the second temperature measuring point T on the inner side of the protective layer 2 When the temperature rise rate is in a linear relationship, the heat conduction heat of the protective layer is calculated through the heat conduction equation, and the calculation formula is shown in Eq...

specific Embodiment approach 2

[0046] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the first temperature measuring point T is made 1 The temperature reaches 500°C. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0047] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the first temperature measuring point T is heated by heating. 1 The temperature reaches 600°C. Others are the same as those in the first or second embodiment.

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Abstract

The invention relates to a detection method, in particular to a testing method of the thermal insulation performance of a vacuum high temperature thermal protection product. In order to solve the technical problems that in an existing thermal protection product thermal insulation performance testing process, a larger scattering difference exists in temperature rise time, and a testing result is not accurate when interferences of measuring equipment and measuring technologies are removed, the method comprises the following steps that after a thermal protection layer coats a to-be-protected product, and at the vacuum degree being 7*10<-3> Pa, a first temperature measuring point T1 is arranged on the outer side of the protective layer, and a second temperature measuring point T2 is arranged on the inner side of the protective layer, heating is performed so that the temperature of the first temperature measuring point T1 can at least reach 500 DEG C, and then, the heat flow stabilizing state is reached after heating is performed for a period of time; when the temperature rising rate of the second temperature measuring point T2 on the inner side of the protective layer is in a linear relation, the heat conducting coefficient of the thermal protection layer and the temperature changing rate of the to-be-protected product are in a linear relation through formula computing, and the larger the gas cylinder temperature changing rate is, the poorer the thermal insulation performance of the thermal protection layer is. The method can perform quantitative evaluation on the thermal insulation performance of the thermal protection layer of a gas cylinder.

Description

technical field [0001] The invention relates to a method for testing the thermal insulation performance of a vacuum high-temperature thermal protection product. Background technique [0002] The heat protection layer of titanium alloy gas cylinder is composed of low thermal conductivity materials in the middle layer and high reflectivity materials on both sides at intervals to form a multilayer composite structure heat protection layer. In order to ensure product reliability, batch Product sampling test requirements. The test method is: under vacuum conditions, after the gas cylinder is covered with a thermal protective layer product, temperature measuring points are respectively set on the outer side of the protective layer and the gas cylinder, and the temperature of the temperature measuring point on the outer side of the protective layer reaches at least 500°C by heating, and keeps for a certain period of time , by measuring the temperature rise of the gas cylinder shel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 李明伟刘建方钟业盛胡坚勇潘亮张中洲于洋赫晓东孙慧娟孙志远
Owner 深圳申成科技发展有限公司