Material low-temperature mechanics performance testing device using refrigerator as cold source

Abstract

The invention discloses a material low-temperature mechanics performance testing device using a refrigerator as a cold source. The device comprises a vacuum heat preservation barrel, a test sample cavity, a heat radiation preventing barrel, an outer gas storage bag and the refrigerator, wherein the vacuum heat preservation barrel is placed on a base in a universal material testing machine; the test sample cavity is arranged in an internally-built temperature controller which is arranged in the heat preservation barrel; the test sample cavity covers the heat radiation preventing barrel which is positioned in the heat preservation barrel; helium is arranged in the outer gas storage bag which is communicated with the test sample cavity; a sample to be tested is rigidly connected with a mechanics support frame by a measuring clamp and moves up and down; the testing machine is provided with a mechanics and displacement sensor and supplies the mechanics power source for the test sample to be tested; the mechanics support frame transmits a mechanics signal and a displacement signal of the test sample to be tested to a mechanics sensor and a displacement sensor; the refrigerator is arranged in the heat preservation barrel; a cooling head is in contact with the test sample cavity by virtue of bridge connection; and cold energy is supplied to the test sample cavity. By utilizing the device, the refrigerator is used as the cold source, liquid helium or liquid nitrogen are not needed to be consumed, so that the material mechanics test of any of the temperature points in the temperature area of 4.2-300K can be realized; and moreover, the temperature is accurately controlled, and the device has a simple structure, and is easy to operate and high in efficiency.

Description

technical field [0001] The invention relates to a device for testing low-temperature mechanical properties of materials, in particular to a device for testing low-temperature mechanical properties of materials suitable for a refrigerator in a low-temperature environment (4.2K-300K) as a cold source. Background technique [0002] With the development of my country's hydrogen energy, nuclear fusion energy, aerospace, applied superconductivity, gas industry, and some large scientific projects, there are more and more projects involving cryogenic engineering. In the field of industry and scientific research, the demand for low-temperature materials is increasing, and the performance data requirements for low-temperature materials are becoming more and more comprehensive. Materials work in a low temperature environment, and their low temperature physical properties are usually different from those at room temperature. Among them, the mechanical properties of materials are an imp...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-temperature mechanical property test device for materials with a refrigerator as a cold source, so as to overcome the defects of existing material low-temperature mechanical property test devices that rely heavily on liquid nitrogen or liquid helium resources, high cost, and complicated operation.

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