Assembly method of stainless steel tube shell and capillary core in a loop heat pipe evaporator

Abstract

The invention relates to an assembly method of a stainless steel tube shell and a capillary core in a loop heat pipe evaporator. By adopting a specially designed preparation tool and optimizing the heating temperature, heating time, assembly time and cooling mode in the assembly process, The precision interference fit between the stainless steel tube shell and the capillary core has been realized, and the steel pipe fixing seat of the assembly tool is provided with a vent hole, which can release the compressed air generated in the stainless steel tube shell when the capillary core is loaded into the stainless steel tube shell, ensuring that the capillary core It can be assembled in place; there is a "V"-shaped buffer part in the stainless steel tube shell to absorb the impact force generated during the capillary core's descent and eliminate the rebound of the capillary core; the guide part of the assembly tool is tapered, which can ensure the smooth installation of the capillary core Into the stainless steel tube shell, and can vertically drop into the stainless steel tube shell, the present invention improves the reliability of the capillary core through the above-mentioned assembly tooling and assembly method, and greatly improves the assembly quality of the loop heat pipe evaporator.

Description

Technical field [0001] The invention relates to the technical field of loop heat pipe evaporators, in particular to a method for assembling a stainless steel tube shell and a capillary wick in a loop heat pipe evaporator. Background technique [0002] With the rapid development of aerospace technology, the application of high-power payloads, and the deepening of aerospace engineering such as deep space exploration, the space environment in which spacecraft is located has become more complex, and the thermal control of spacecraft has become more complex. [0003] In order to solve the thermal control problem of spacecraft, many solutions have been proposed. Among them, the loop heat pipe, as a new and efficient thermal control technology, is of great significance for the thermal control of high-power payloads and the field of deep space exploration. . The loop heat pipe has been paid attention to by various countries since its invention. Advanced aerospace countries such as Russia ...

AI Technical Summary

Problems solved by technology

[0004] (1) The heating temperature range of the low-melting point alloy is limited, and the heating temperature cannot be flexibly changed according to the change of the size of the stainless steel shell; and the low-melting point alloy used for assembling the loop heat pipe evaporator generally contains metallic lead, and the lead vapor is harmful to the human body after heating. serious bodily harm;

[0005] (2) After the existing assembly is completed, low-melting point alloys will remain on the outer circle of the stainless steel shell, which needs to be eliminated by post-processing;

[0006] (3) There is no assembly tooling in the existing assembly, and there are big problems in the fixing of the stainless steel shell and the guidance and buffering of the capillary core during the assembly process. The success rate of assembly is very low, and the assembly is difficult to operate, which affects the skill level of the operator. higher requirements;

[0007] (4) In the existing assembly technology, in order to ensure that the capillary core is loaded into the stainless steel shell, it is sometimes necessary to perform a hammering operation on the capillary core. Improper operation can easily cause the capillary core to be scrapped, and even if the assembly is completed, the stainless steel shell and the capillary core will be affected The amount of interference, which affects the performance of the final evaporator, the reliability is very low

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