Device for independently assessing phase modulating capacity of inertia tube and air reservoir and assessment method

Abstract

The invention discloses a device for independently assessing phase modulating capacity of an inertia tube and an air reservoir and an assessment method. The device comprises a to-be-assessed inertia tube, the air reservoir, a compressor, a dynamic pressure sensor, a displacement sensor, an oscilloscope and a temperature control device, wherein the dynamic pressure sensor is used for measuring inlet pressure waves of the inertia tube, the displacement sensor is used for measuring scavenging air volume of the compressor, the oscilloscope is used for measuring a phase relationship between the pressure waves and piston displacement, and the temperature control device is used for providing different temperature control for the inertia tube and the air reservoir. Inlet acoustic power of the inertia tube is regulated by changing input power of the compressor, so that the relationship between acoustic power and the phase at different temperatures of the inertia tube and the air reservoir is obtained. The device has the advantages that interferences of a cold finger and other structural factors of a pulse tube refrigerator can be excluded, phase modulating capacity of the inertia tube and the air reservoir is independently assessed, the structure is simple, operations are easy, evaluation objectives are clear, the design of the inertia tube and the air reservoir is favorably improved, and efficiency is optimized.

Description

Technical field: [0001] The invention belongs to the field of regenerative low-temperature pulse tube refrigerators, and specifically relates to a device and an evaluation method suitable for independently evaluating the inertia tube and gas storage phase modulation capability of the pulse tube refrigerator. Background technique: [0002] The pulse tube refrigerator is a new type of regenerative low-temperature refrigerator. Compared with the traditional Stirling refrigerator, it eliminates the mechanical moving parts of the cold end and adopts the phase modulation mechanism of the hot end to obtain the ideal phase relationship. It has a simple structure , Small vibration, high reliability, etc. Since the 1980s, pulse tube refrigerators have received extensive attention and research at home and abroad, and have been widely used in aerospace, superconducting industry, cryogenic electronics, cryogenic medicine, etc. With the in-depth study of the pulse tube refrigeration mechanism...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a device and evaluation method for independent evaluation and evaluation of the phase adjustment ability of the inertial tube and gas storage of pulse tube refrigerators with simple structure and convenient operation, so as to solve the problem that the existing regenerative low-temperature refrigerators cannot adjust the inertial tube and gas storage. The problem of independent and effective evaluation of phase structure design performance

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