System and method for obtaining pulse modification optimum matching between pulse tube cold finger and inertial tube gas reservoir

Abstract

The invention discloses a system and method for obtaining pulse modification optimum matching between a pulse tube cold finger and an inertial tube gas reservoir. The system comprises a linear compressor, the pulse tube cold finger, an active phase modulation device, the inertial tube gas reservoir, a pressure sensor, a displacement sensor, an oscilloscope, a hot-wire anemoscope, a Dewar vacuum bottle and a refrigerating capacity measuring system. The pressure sensor is used for measuring the inlet and outlet pressure waves of the cold finger, the displacement sensor is used for measuring thescavenging volume of the compressor, the oscilloscope is used for measuring the phase relation between the pressure waves and the displacement of a piston, firstly, the active phase modulation deviceis used for finding the phase relationship between the pressure waves and the volume flow of the cold finger when the pulse tube cold finger reaches the optimal performance, then the phase modulationdevice is changed into the inertial tube gas reservoir, size parameters of the inertial tube gas reservoir are changed, and the phase relationship of the pressure waves and the volume flow of the pulse tube cold finger during active phase modulation is achieved, so that the pulse tube cold finger reaches the optimal performance. The system and method have the advantages that interference of pulsetube cold finger refrigerating capacity measurement can be eliminated, the performance of the pulse tube cold finger is independently evaluated, the operation is easy, and the structure is simple.

Description

Technical field: [0001] The invention belongs to the field of regenerative low-temperature refrigerators, and in particular relates to a system and method for obtaining the best phase modulation matching between pulse tube cold fingers and inertial tube gas storage. Background technique: [0002] The pulse tube refrigerator is a new type of regenerative cryogenic refrigerator. Compared with the traditional Stirling refrigerator, it eliminates the mechanical moving parts at the cold end, and uses the phase adjustment mechanism at the hot end to obtain the ideal phase relationship. It has a simple structure , small vibration, high reliability and so on. 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, low-temperature electronics, and low-temperature medicine. With the in-depth research on the mechanism of pulse tube refrigeration and the gradual improv...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for obtaining the optimal phase modulation between the pulse tube cold finger and the inertial tube gas storage, so as to solve the problem that the existing regenerative cryogenic refrigerator cannot optimally match the phase modulation of the pulse tube cold finger and the inertial tube gas storage The question of obtaining an independent, valid evaluation of the strengths and weaknesses of methods

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