Device capable of testing elastic properties of springs in wide low-temperature zones

A technology of elastic performance and low temperature area, which is applied in the field of testing equipment for elastic performance of compression springs, can solve the problems of stable test temperature, unrealistic, displacement sensor and force sensor not suitable for exposure to low temperature environment, and achieve rapid cooling or heating effect

Inactive Publication Date: 2013-05-22
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

Due to the small size of the spring, it is not realistic to use a low-temperature refrigeration system to provide a test environment
On the other hand, when testing the elastic performance of the spring, the deformation and spring force of the spring must be tested. Neither the displacement sensor nor the force sensor is suitable for exposure to low temperature environments.
The invention patent with the application number 200710120292.2 provides a device for

Method used

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  • Device capable of testing elastic properties of springs in wide low-temperature zones
  • Device capable of testing elastic properties of springs in wide low-temperature zones

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Embodiment Construction

[0014] see figure 1 , a low-temperature testing device for elastic properties of compression springs, consisting of a cold trap 3, a low-temperature working fluid gas distribution system and an elastic testing system, wherein the low-temperature working fluid gas distribution system is used to provide the cold trap with low-temperature working fluid at a set temperature , In addition to the gas regulating valve 1, there are no other moving parts in the gas distribution system. The effect of the cold trap is to provide a low temperature environment where the test spring 7 can be placed, and there are no moving parts in the cold trap. The function of the elastic testing system is to measure the elastic performance of the spring, which mainly includes a force sensor 10 for detecting spring force and a displacement sensor 12 for detecting spring deformation.

[0015] The cryogenic working medium gas distribution system includes a liquid injector 2 and a gas injector 4; the liquid...

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Abstract

The invention discloses a device capable of testing elastic properties of springs in wide low-temperature zones. The device comprises a spring cavity for accommodating a tested spring and a testing system for spring force and deformation of the tested spring. The device is characterized in that the spring cavity is arranged in a cold trap, the cold trap is sequentially provided with a heat-insulation layer, a low-temperature cavity and the spring cavity from outside to inside, the spring cavity is placed on the inner upper portion of the low-temperature cavity and is isolated from the low-temperature cavity, the low-temperature cavity is provided with an inlet and an outlet which are communicated with a low-temperature working medium distribution system, the heat-insulation layer is wrapped on the outer portion of the low-temperature cavity, and a heat-insulation sandwich layer which is filled with air or is vacuum is arranged between the heat-insulation layer and the low-temperature cavity.

Description

technical field [0001] The invention relates to a device for testing the elastic performance of a compression spring, in particular to a device for testing the elastic performance of a compression spring in a temperature range from room temperature to -268°C. Background technique [0002] With the development of science and technology, cryogenic devices are used more and more widely. The accurate measurement of the elastic coefficient of springs used in these devices plays an important role in the design and use of springs. In particular, shape memory alloy springs work under different temperature conditions. When testing their elastic properties, the test environment needs to be controlled in the low temperature environment used. Due to the small size of the spring, it is not realistic to use a low-temperature refrigeration system to provide a test environment. On the other hand, when testing the elastic performance of the spring, the deformation and spring force of the sp...

Claims

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Application Information

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IPC IPC(8): G01M5/00
Inventor 吴伟烽谢佳聂娟冯全科
Owner XI AN JIAOTONG UNIV
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