Active piston phase modulation and power recovery integrated pulse tube refrigerator supported by column spring

Abstract

The invention discloses an active piston phase modulation and power recovery integrated pulse tube refrigerator supported by a column spring. A shock absorber, an active phase modulation and piston power recovery mechanism, a compressor and a cold finger of the refrigerator are arranged on the same axis, and an active phase modulation piston shaft penetrates through an inner hole of a compression piston and is connected with a refrigerator shell through a phase modulation piston column spring. A compressor motor and an active phase modulation piston motor both adopt moving coil type linear motors, so that the radial vibration is small. The compression piston and the active phase modulation piston both adopt gas bearings, the compression piston is supported by a single-side column spring, and the active phase modulation piston is used for recovering expansion work and improving the efficiency of the refrigerator. Two displacement sensors are arranged to monitor the displacement of the active phase modulation piston and the displacement of the compression piston correspondingly, the phase between the compression piston and the active phase modulation piston is adjusted through the active phase modulation piston motor, and efficient operation of the refrigerator is guaranteed. The refrigerator has the advantages of compact structure, low vibration, work recovery and high refrigeration efficiency.

Description

technical field [0001] The invention relates to a pulse tube refrigerator, in particular to an active piston phase modulation work recovery integrated pulse tube refrigerator supported by a column spring. Background technique [0002] The infrared detection system has the advantages of high resolution, good concealment, and excellent anti-interference performance. It is widely used in aerospace infrared remote sensing, medical, military, communication, and poisonous gas monitoring. However, the infrared detector will be very large after being cooled at a low temperature. To a certain extent, the response speed is improved, the sensitivity is improved, the detection range is expanded, and the influence of background noise is reduced. Therefore, the Stirling refrigerator with compact structure, fast start-up, and wide temperature control range is widely used to cool the focal plane of infrared detectors. The compressor and expander of the split Stirling refrigerator have sidew...

AI Technical Summary

Problems solved by technology

The expansion work of the pulse tube refrigerator cannot be recovered and dissipated as heat, resulting in a decrease in efficiency

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