Spring testing device based on gm refrigerator

Abstract

The invention discloses a spring testing device based on a GM refrigerator, which comprises a low-temperature thermostat and a spring elastic performance testing system; the low-temperature thermostat includes an outer wall of an adiabatic container, a cold screen, and a GM refrigerator. The spring elastic performance testing system includes a sample channel and a sample testing mechanism, wherein the sample channel runs through the cover plate of the heat-insulating container and the cold screen cover plate longitudinally, and the sample testing mechanism runs through the sample channel longitudinally. The spring low-temperature elastic performance testing device and method based on the GM refrigerator provided by the present invention utilizes the GM refrigerator to provide cooling capacity, avoids the use of low-temperature working fluids such as liquid nitrogen and liquid helium, simplifies the structure of the device, and reduces the operating cost of the equipment; Realize continuous adjustment of test temperature from room temperature to liquid helium temperature range, wider temperature adjustment range, faster temperature adjustment response, and shorter temperature stabilization time; sample replacement and installation are easier and more convenient to operate, suitable for testing a large number of samples .

Description

technical field [0001] The invention belongs to the field of spring testing, and relates to a GM refrigerator, in particular to a spring testing device based on the GM refrigerator. Background technique [0002] In the fields of aerospace, industry, scientific research, and medical treatment, springs, as important components in cryogenic devices, need to meet certain mechanical properties in low temperature environments. Therefore, it is necessary to accurately measure the elastic coefficient of springs at low temperatures. Since the spring needs to work in different temperature environments, the measurement of the elastic coefficient of the spring needs to be carried out under different temperature conditions, which requires that the measuring equipment can not only be adjusted in a wide temperature range, but also be stable at a certain temperature condition . [0003] Most of the current spring performance testing devices use liquid nitrogen or liquid helium as the cryog...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current device of spring low temperature elastic performance relies on low temperature refrigerant such as liquid nitrogen or liquid helium, the design and operation of the equipment are relatively complicated, the time response of the temperature adjustment and stabilization process is slow, and the operating cost is high. problem, and propose a spring low temperature elastic performance test device based on GM refrigerator

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