Device for measuring refrigerating power of GM refrigerator

Abstract

The invention discloses a device for measuring a refrigerating power of a GM refrigerator. The device comprises a measuring platform and a refrigerator component to be tested, wherein the refrigeratorcomponent to be tested is longitudinally embedded into the measuring platform, and the refrigerator component to be tested is connected and fixedly arranged in a refrigerating capacity measuring platform of the GM refrigerator through a bolt and a sealing ring I. The beneficial effects of the invention are as follows: one refrigerator is used for respectively cooling a first radiation screen anda second radiation screen of the refrigerating capacity measuring platform of the GM refrigerator, so as to minimize the influence of the radiation and heat leakage of an external conduction and heatleakage machine on the measurement of the refrigerating capacity of the GM refrigerator. A first-stage cold head and a second-stage cold head of the GM refrigerator to be tested are respectively provided with a heater, thus the refrigerating capacity of the GM refrigerator under different temperature working conditions can be measured. The device for measuring the refrigerating power of the GM refrigerator provided by the invention is simple in structure, low in cost and convenient to use, so that a buyer can conveniently carry out pre-assembly testing on the cold heads of the GM refrigerator,thereby reducing the potential risk of the subsequent production.

Description

technical field [0001] The invention relates to the field of low temperature system detection, in particular to a device for measuring the cooling power of a GM refrigerator. Background technique [0002] In the ultra-low temperature liquid helium zero-volatility system, the cold head of the GM refrigerator and the liquid helium together form the cold source of the ultra-low temperature system. The gas is condensed into liquid helium, so that the liquid helium system forms a closed cycle, and the liquid helium achieves zero volatilization during normal operation. Cooling capacity is the main technical index of the cold head of GM refrigerators. To achieve zero volatilization, the cooling capacity of the primary and secondary cold heads must be ensured first. However, due to failure or improper maintenance, the cooling efficiency will be reduced, so it is particularly important to measure the cooling capacity before installing the machine. [0003] The cold heads of existin...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing GM refrigerator testing equipment is expensive, and the purchaser has no good way to detect the refrigerating capacity of the GM refrigerator after receiving the goods, and proposes a me

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