Integrated hot end phase adjusting structure of inertance-tube type pulse tube cooler and manufacturing method of phase adjusting structure

Abstract

The invention discloses an integrated hot end phase adjusting structure of an inertance-tube type pulse tube cooler and a manufacturing method of the phase adjusting structure. In the structure, joint phase adjustment of the inertance tube and a gas storage is adopted; and the structure comprises two inertance tubes with different diameters and lengths as well as the stable-pressure inner gas storage. An integrated inertance tube component is connected with a hot end gas outlet of a pulse tube and the stable-pressure inner gas storage, and wound on the outer surface of the inner gas storage; then the inertance tube component and the inner gas storage are integrally placed in a special protective cover. The novel hot end phase adjusting structure has the advantages that: the hot end phase adjusting capability is maximized; and the integrity and stability of the effective volume of working medium in the gas storage are ensured. The gas working medium in the system is protected from pollution of the phase adjusting device; the structure is simple and compact; and the anti-vibration and anti-impact capabilities are enhanced. The mechanical and thermodynamic performance of the pulse tube cooler is improved in a great degree, and the long-term operation reliability and a relatively long working life are guaranteed.

Description

technical field [0001] The invention relates to an inertial tube type pulse tube refrigerator, in particular to an integrated hot end phase modulation structure of an inertial tube type pulse tube refrigerator and a manufacturing method thereof. Background technique [0002] The pulse tube refrigerator is a major innovation of the regenerative cryogenic refrigerator. It cancels the cold-end discharger widely used in conventional regenerative low-temperature refrigerators (such as Stirling or G-M machines), and uses the operation of the hot-end phasing mechanism to realize the pressure wave and mass flow required for refrigeration. Phase difference. The complete cancellation of moving parts at the cold end has achieved low vibration, low interference and no wear at the cold end; and through a series of important improvements in structure and phase adjustment methods, in some typical temperature regions, its actual efficiency has reached the regenerative type Highest value a...

AI Technical Summary

Problems solved by technology

[0005] 1) The structure is loose, occupies a large space volume, and is difficult to apply in practice;

[0006] 2) Poor anti-vibration and impact resistance;

[0007] 3) A separate inertia tube and gas storage fixture are required in practical applications, increasing the complexity of the system

[0009] 1) In order to increase the anti-vibration and impact resistance in practical applications, a separate inertia tube fixing and supporting device still needs to be added inside the gas storage, and the coiling and assembly of the inertia tube is very difficult;

[0010] 2) The reciprocating oscillating gas working medium in the system directly scours the outer surface of the inertial tube in the gas storage, and the working medium is easily polluted by the residual pollutants after cleaning the outer surface of the inertial tube or the pollutants produced after long-term work, which makes the pulse tube The performance of the refrigerator is attenuated and the working life is shortened;

[0011] 3) The existence of the phase modulation device inside the gas storage divides the volume of the effective voltage stabilization source into irregular small volume units, which destroys the gas balance in the gas storage, increases the air flow disturbance, makes the phase modulation ability uncontrollable, and increases the phase difficulty

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