CN203657578U - Heat pipe suitable for space application - Google Patents

Abstract

The utility model discloses a heat pipe suitable for space application, and belongs to the technical field of thermal control of a space system. The heat pipe suitable for space application resolves the problems that according to the thermal control of an existing space system, one heat pipe can not be connected with multiple heat sources, and when multiple heat pipes are connected with multiple heat sources, the weight of the space system is increased, and the work medium inside the heat pipes is turbulent in circulation or even out of work. The heat pipe suitable for space application comprises an inner circulation passage and an outer circulation passage, wherein the inner circulation passage comprises a heat input section, a heat insulation section and a heat output section which are arranged on an inner passage heat pipe outer shell, the outer circulation passage comprises a heat input section, a heat insulation section and a heat output section which are arranged on an outer passage heat pipe outer shell, the outer passage heat pipe outer shell is arranged at the outer side of the inner passage heat pipe outer shell in a sleeved mode, is equal to an inner passage heat insulation section in length and corresponds to the inner passage heat insulation section in position, the pipe wall of the inner passage heat insulation section is of a double-layer structure, the outer layer is made of heat insulation materials, and the inner layer is made of metal materials. The heat pipe suitable for space application can be connected with two heat sources, has high heat transferring efficiency, does not obviously increase the size, and saves the space of the space system.

Description

A heat pipe suitable for space applications

technical field

The utility model relates to the technical field of space system heat control, in particular to a heat pipe suitable for space applications.

Background technique

In the thermal control of space systems, in order to organize the heat exchange process reasonably, it is often necessary to establish an effective heat flow path to guide the heat transfer in the components.

The volume of the space system is limited, and there are many restrictions on weight and energy. It is often not easy to establish a heat flow path by conventional structural conduction, surface radiation, and forced convection. A heat pipe is a device that transfers heat by using the evaporation, condensation, phase change and circulating flow of the working fluid. Because the thermal resistance of liquid evaporation and condensation is very small, the heat pipe can transfer a large heat flow under a small temperature difference. In the space system, heat pipes can be used to transfer the waste heat of certain components to some cooler components, which not only solves the waste heat dissipation of hot components and the heating of cold components, but also effectively reduces the weight of the space system and saves energy. Space system energy.

However, in practical applications, a heat pipe has only one heat input section. When multiple heat flow paths need to be established, multiple heat pipes are required. Since the space equipment is usually compact in structure and has strict requirements on weight, connecting multiple heat pipes It will cause great limitations in practical applications, and because the heat transfer efficiency of the heat pipe is very high, the heat transfer of multiple heat components can sometimes be completed with only one heat pipe. If the existing heat pipe is connected to two or more heat sources at the same time, It will cause the internal working medium circulation disorder of the heat pipe, and even cause the blockage to cause the heat pipe to fail.

Utility model content

The purpose of this utility model is to solve the problem of low heat transfer efficiency caused by the inability of one heat pipe to connect multiple heat sources in the thermal control of the existing space system. When multiple heat pipes are connected to multiple heat sources, the weight of the space system is increased, and the working fluid inside the heat pipe is To solve the problem of circulation disorder and even failure, a heat pipe suitable for space applications is provided.

A heat pipe suitable for space application of the utility model includes an inner circulation passage and an outer circulation passage; the inner circulation passage includes an inner passage heat input section, an inner passage heat insulation section and an inner passage heat output section arranged on the heat pipe shell of the inner passage The outer circulation passage includes an outer passage heat input section, an outer passage heat insulation section and an outer passage heat output section arranged on the outer passage heat pipe shell; The lengths of the heat sections are equal and the positions are corresponding; the heat insulation section of the inner passage is located between the heat input section of the inner passage and the heat output section of the inner passage. The outer layer is made of heat-insulating material, and the inner layer of the pipe wall of the heat-insulating section of the inner passage is made of metal material; the heat-insulating section of the outer passage is located between the heat input section of the outer passage and the heat output section of the outer passage; The via heat input section is used to connect a heat source.

Further, the thickness of the outer layer of the tube wall of the inner passage heat insulation section is 1/3-1/2 of the thickness of the tube wall of the inner passage heat pipe shell.

Further, the inner layer of the tube wall of the heat insulation section of the inner passage is integrated with the shell of the inner passage heat pipe.

Further, capillary material is laid on the inner side of the tube wall of the inner passage heat pipe casing and the inner side of the outer passage heat pipe casing, and the gaps of the capillary material are filled with liquid working medium.

Further, both the inner passage heat pipe casing and the outer passage heat pipe casing are metal pipe bodies.

Further, the material of the metal pipe body is aluminum alloy.

Working principle of the utility model:

The heat pipe of the utility model includes two circulation passages in the inner layer and the outer layer, each circulation passage includes a heat input section, a heat output section and a heat insulation section, and the heat insulation section of the inner circulation passage is located in the inner circulation heat input section In the middle of the heat output section, the heat insulation section of the outer circulation path is located in the middle of the heat input section and the heat output section of the outer circulation path, and the pipe wall of the heat insulation section of the inner circulation path is the inner wall of the outer circulation path , the wall surface of the heat input section of the inner and outer passages of the heat pipe is connected to the heat source, and the heat is transferred to the capillary structure and the liquid working medium in it through the tube wall of the respective heat input section, and the temperature of the liquid working medium rises to make the free surface Evaporation is strengthened. Under the action of the pressure difference between the heat input section and the heat output section, the steam flows from the heat input section to the heat output section, releases the latent heat of vaporization, and recondenses into a liquid. The continuous vapor-liquid circulation of the heat pipe through the liquid working medium can simultaneously Transfer the heat from the two heat sources to the heat output section for dissipation, and work independently of each other without interfering with each other, so as to realize the cooling of the two heat sources by one heat pipe, save the space system space, reduce the space system weight, and reduce the components Quantity, the utility model can realize dual heat source input and cool two hot parts at the same time.

The beneficial effects of the utility model:

The utility model enables the heat pipe to connect two heat sources through the double circulation path of the heat pipe, and cools the two heat sources at the same time. While ensuring the high thermal efficiency of the heat pipe, the size of the heat pipe will not be significantly increased, and the use of the heat pipe will be reduced. Quantity, to further reduce the weight of the thermal control system of the space system, save the space of the space system; no additional accessories are added when effectively meeting the design requirements.

Description of drawings

FIG. 1 is a cross-sectional view of a heat pipe suitable for space applications of the present invention.

FIG. 2 is a structural schematic diagram of the inner circulation path and the outer circulation path of the heat pipe suitable for space application of the present invention.

In the figure: 1. The shell of the inner passage heat pipe, 11. The heat input section of the inner passage, 12. The heat insulation section of the inner passage, 121 The outer layer of the pipe wall of the inner passage heat insulation section, 122. The inner layer of the pipe wall of the inner passage heat insulation section, 13 . Heat output section of the inner passage, 2. Heat pipe shell of the outer passage, 21. Heat input section of the outer passage, 22. Heat insulation section of the outer passage, 23 Heat output section of the outer passage, 3. Capillary structure, 4. Liquid working medium, 5. Steam, 6, internal circulation passage, 7, external circulation passage.

Detailed ways

This embodiment is described in conjunction with FIG. 1 and FIG. 2, a heat pipe suitable for space applications, the heat pipe includes an inner circulation passage 6 and an outer circulation passage 7, and the inner circulation passage 6 includes an inner passage heat input provided on the inner passage heat pipe shell 1 Section 11, inner passage heat insulation section 12 and inner passage heat output section 13, outer circulation passage 7 includes outer passage heat input section 21, outer passage heat insulation section 22 and outer passage heat output section 23 arranged on outer passage heat pipe shell 2 . The outer passage heat pipe casing 2 is set on the outer side of the inner passage heat pipe casing 1, the specific position corresponds to the position of the inner passage heat insulation section 12, and the length is equal to the length of the inner passage heat insulation section 12, that is, the outer passage heat input section 21, the outer passage heat input section The total length of the heat insulation section 22 of the passage and the heat output section 23 of the outer passage is equal to the length of the heat insulation section 12 of the inner passage, and the heat insulation section 12 of the inner passage is located in the middle of the heat input section 11 of the inner passage and the heat output section 13 of the inner passage. The pipe wall of the heat insulation section 12 is divided into two layers, the outer layer 121 of the pipe wall of the heat insulation section of the inner passage is made of heat insulating material, and the inner layer 122 of the pipe wall of the heat insulation section of the inner passage is integrated with the heat pipe shell 1 of the inner passage, both of which are metal materials. The outer passage heat insulation section 22 is located in the middle of the outer passage heat input section 21 and the outer passage heat output section 23 .

In this embodiment, the thickness of the outer layer 121 of the pipe wall of the inner passage heat insulation section is 1/3˜1/2 of the thickness of the pipe wall of the inner passage heat pipe shell 1 .

Capillary material 3 is laid on the inner side of the pipe wall of the inner passage heat pipe casing 1 and the outer passage heat pipe casing 2 of this embodiment, and the gap of the capillary material 3 is filled with liquid working medium 4. After the heat is input, the inner circulation passage 6 and the outer circulation passage 7 The central space is filled with the saturated steam 5 of the liquid working medium 4 .

In this embodiment, the heat pipe casing 1 of the inner passage is a sealed metal pipe body, and the heat pipe casing 2 of the outer passage is a metal pipe body. After being assembled, the inner circulation passage 6 and the outer circulation passage 7 are sealed structures, and the material of the metal pipe body is aluminum alloy. .

The heat input section 1 of the inner passage and the heat input section 2 of the outer passage of the heat pipe in this embodiment are connected to a heat source, the heat of the heat source of the inner passage is transmitted to the heat input section 11 of the inner passage through the heat pipe shell 1 of the inner passage, and the heat input section 11 of the inner passage is transferred to the heat input section 11 of the inner passage. The capillary structure 3 and the liquid working medium 4 therein, the temperature of the liquid working medium 4 increases to make its evaporation on the free surface strengthen, the steam 5 in the tube has a vapor pressure difference between the heat input section 11 of the inner passage and the heat output section 13 of the inner passage Under the action, it flows from the heat input section 11 of the inner passage to the heat output section 13 of the inner passage, releases the latent heat of vaporization in the heat output section 13 of the inner passage, recondenses into a liquid working medium 4, and then flows back to the heat input section of the inner passage through the capillary structure 3 11. In this way, the working fluid completes a flow cycle, and transfers the heat from the heat source of the inner path to the heat output section 13 of the inner path to be discharged. The heat output section 13 of the inner path can be connected to a heat sink or in a state of natural heat discharge; the heat source of the outer path The heat is transferred to the heat input section 21 of the external passage through the heat pipe shell 2 of the external passage, and the heat input section 21 of the external passage is transferred to the capillary structure 3 and the liquid working medium 4 therein, and the temperature of the liquid working medium 4 increases to strengthen the evaporation on the free surface , the steam 5 in the pipe flows from the heat input section 21 of the outer passage to the heat output section 23 of the outer passage under the action of the steam pressure difference between the heat input section 21 of the outer passage and the heat output section 23 of the outer passage, and releases vaporization in the heat output section 23 of the outer passage The latent heat is re-condensed into the liquid working medium 4, and then flows back to the heat input section 21 of the external passage through the capillary structure 3, so that the working medium completes a flow cycle and transfers the heat from the heat source of the external passage to the heat output section 23 of the external passage for discharge. The heat output section 23 of the passage can be connected with a heat sink or can be in a state of natural heat discharge; the heat pipe of this embodiment can effectively cool the two heat sources, and since the heat insulation section 12 of the inner passage adopts heat insulating material, the circulation passages of the two heat sources are mutually incompatible. Influence, further reduce the weight of the thermal control system of the space system, and save the space of the space system.

Claims (6)

1. A heat pipe suitable for space applications, characterized in that the heat pipe comprises an inner circulation path (6) and an outer circulation path (7); The inner circulation passage (6) includes an inner passage heat input section (11), an inner passage heat insulation section (12) and an inner passage heat output section (13) arranged on the inner passage heat pipe shell (1); The outer circulation passage (7) includes an outer passage heat input section (21), an outer passage heat insulation section (22) and an outer passage heat output section (23) arranged on the outer passage heat pipe shell (2); The outer passage heat pipe casing (2) is set on the outside of the inner passage heat pipe casing (1), and has the same length as the inner passage heat insulation section (12), and the position corresponds to it; The inner passage heat insulation section (12) is located between the inner passage heat input section (11) and the inner passage heat output section (13), the pipe wall of the inner passage heat insulation section (12) has a double-layer structure, and the inner passage insulation The outer layer (121) of the pipe wall of the hot section is a thermal insulation material, and the inner layer (122) of the pipe wall of the heat insulation section of the inner passage is a metal material; The outer passage heat insulation section (22) is located between the outer passage heat input section (21) and the outer passage heat output section (23); The heat input section (12) of the inner passage and the heat input section (22) of the outer passage are used for connecting a heat source. 2. A heat pipe suitable for space application according to claim 1, characterized in that, the thickness of the outer layer (121) of the pipe wall of the inner passage heat insulation section is 1/2 of the thickness of the pipe wall of the inner passage heat pipe shell (1). 1/3～1/2. 3 . The heat pipe suitable for space application according to claim 1 , characterized in that, the inner layer ( 122 ) of the tube wall of the inner passage heat insulation section is integrated with the inner passage heat pipe casing ( 1 ). 4 . 4. A heat pipe suitable for space application according to claim 1, characterized in that capillary tubes are laid on the inner side of the tube wall of the inner path heat pipe shell (1) and the inner side of the tube wall of the outer path heat pipe shell (2). material (3), the voids of the capillary material (3) are filled with liquid working fluid (4). 5 . The heat pipe suitable for space application according to claim 1 , characterized in that, both the heat pipe casing ( 1 ) of the inner path and the heat pipe casing ( 2 ) of the outer path are metal pipe bodies. 6 . 6 . The heat pipe suitable for space application according to claim 5 , wherein the material of the metal pipe body is aluminum alloy.

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