Structure and manufacturing method of heat pipe with variable cross section

Abstract

The invention provides a heat pipe structure with variable cross-section, comprising: a first heat pipe head (1), a heat pipe capillary cavity (2), a second heat pipe head (3) and a liquid-filled pipe (4); A heat pipe head (1) and a second heat pipe head (3) are respectively installed at both ends of the capillary cavity of the heat pipe (2); the liquid filling pipe (4) is installed on the second heat pipe head (3); The heat pipe capillary cavity (2) has a variable cross-section structure; the heat pipe capillary cavity (2) includes: an evaporation section (5) and a condensation section (6); the evaporation section (5) and the condensation section (6) Distributed at both ends of the capillary cavity (2) of the heat pipe. The invention effectively takes into account the different requirements of the evaporation section and the condensation section on capillary force and flow resistance, and greatly improves the heat transfer capacity of the heat pipe.

Description

technical field [0001] The invention relates to the technical field of mechanical design and manufacture, in particular to a structure and a manufacturing method of a heat pipe with variable cross-section. Background technique [0002] The heat pipe is a passive thermal control element. It is widely used in the heat dissipation and temperature control of satellite high heat flow components because it does not require active components such as pumps and motors, and has the characteristics of light weight and high reliability. A heat pipe consists of a shell, a capillary wick and a working medium. One end of the heat pipe is the evaporating section, and the other end is the condensing section. When the evaporating section is heated, the liquid working substance in the tube core absorbs heat and evaporates, and the steam flows to the condensing section, where it releases heat and condenses into a liquid. Under the action of capillary force in the gap, it flows back to the evap...

AI Technical Summary

Problems solved by technology

[0003] However, the capillary cavity of the traditional heat pipe shell is formed by a press pulling a mold, which is limited by the manufacturing process and can only form a constant cross-section heat pipe, which cannot effectively take into account the difference in capillary force and flow resistance between the evaporating section and the condensing section need

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