Transmission structure for detecting contact thermal conductivity of interface at high temperature

Abstract

The invention discloses a transmission structure for high-temperature detection of interface contact thermal conductivity, and relates to the technical field of vacuum transmission mechanisms. Comprising a vacuum chamber assembly, the vacuum chamber assembly comprises a vacuum chamber cavity, a back pressure part, a heating assembly and a pushing part are arranged in the vacuum chamber cavity, the back pressure part can limit one end of a tested assembly, the heating assembly can heat one end, directly facing the back pressure part, of the tested assembly, and the pushing part and the back pressure part are arranged at an interval; the pushing part is used for supporting the other end of the tested assembly, and the pushing part is matched with a cooling medium accommodating structure; the pushing assembly comprises a transmission rod and a linear driving assembly, the transmission rod is in sliding and sealing connection with the vacuum chamber cavity, one end of the transmission rod is in transmission connection with the pushing component, the other end of the transmission rod is in transmission connection with the linear driving assembly, and the linear driving assembly is located outside the vacuum chamber cavity and can feed back the axial pressure of the transmission rod. The device can simulate the contact thermal conductivity test environment of the component connection interface in the vacuum chamber.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum transmission mechanisms, and in particular to a transmission structure for high-temperature detection of interface contact thermal conductivity. Background Art

[0002] In a magnetic confinement nuclear fusion device, the heat transfer components (such as the first wall) in the vacuum chamber are usually designed for heat transfer using passive cooling, and the plasma-facing material and the structural support material are dissimilar materials, and the fixing method is bolted. Among them, the bolt connection method is easy to install and maintain, so most of the first wall components of magnetic confinement devices at home and abroad use this connection method. As a result, there are a large number of contact interface relationships on the heat transfer path of the first wall, resulting in a relatively low heat transfer efficiency of the interface contact thermal resistance of the heat transfer components in the vacuum chamber, which directly affects the heat transfer capacity and safety performance of the first wall structure.

[0003] Therefore, in order to improve the heat transfer efficiency of components in the magnetic confinement fusion device, it is extremely important to optimize the interface contact thermal conductivity of mechanically connected components to enhance their performance.

[0004] However, due to the many factors that affect the contact thermal conductivity of heat transfer components in the interface vacuum chamber, including interface roughness, interface pressure, interface temperature, thermal properties of interface materials and vacuum environment, it is difficult to obtain accurate interface contact thermal conductivity values ​​through theoretical formulas. Summary of the invention

[0005] In order to solve the technical problem that the contact thermal conductivity of heat transfer components in a vacuum chamber cannot be accurately obtained through theoretical formulas, the present invention provides a transmission structure for high-temperature detection of interface contact thermal conductivity, which can simulate the test environment of contact thermal conductivity of components connected at the interface in the vacuum chamber, and facilitate accurate acquisition of contact thermal conductivity of heat transfer components in the vacuum chamber through experimental measurement means, thereby providing data support for verifying and optimizing the design of high-temperature heat transfer structure of components in the vacuum chamber of a magnetic confinement nuclear fusion device.

[0006] The present invention is achieved through the following technical solutions:

[0007] The present invention provides a transmission structure for high-temperature detection of interface contact thermal conductivity, comprising: a vacuum chamber component, the vacuum chamber component comprising a vacuum chamber cavity, a back pressure component, a heating component and a push component are arranged in the vacuum chamber cavity, the back pressure component can limit one end of the component under test, the heating component can heat the end of the component under test facing the back pressure component, the push component is spaced apart from the back pressure component, the push component is used to support the other end of the component under test, and the push component is adapted to be equipped with a cooling medium accommodating structure; a push component, the push component comprising a transmission rod and a linear drive component, one end of the transmission rod penetrates the vacuum chamber cavity and is transmission-connected with the push component, the transmission rod is slidably and sealingly connected with the vacuum chamber cavity, the other end of the transmission rod is transmission-connected with the linear drive component, the linear drive component is located outside the vacuum chamber cavity, and the linear drive component can feedback the axial pressure on the transmission rod; wherein, the push component can be driven to move toward the back pressure component through the action of the linear drive component to apply corresponding test pressure to the component under test.

[0008] The transmission structure for high-temperature detection of interface contact thermal conductivity provided by the present invention comprises a vacuum chamber cavity, a transmission rod and a linear drive assembly. A back pressure component, a heating assembly and a push component are arranged in the vacuum chamber cavity. The back pressure component can limit one end of the component to be measured, and the heating assembly can heat the end of the component to be measured that faces the back pressure component. The push component and the back pressure component are arranged at intervals and are adapted to have a cooling medium accommodating structure. One end of the transmission rod penetrates into the vacuum chamber cavity and is transmission-connected to the push component. The transmission rod is slidably and sealingly connected to the vacuum chamber cavity. The other end of the transmission rod is transmission-connected to the linear drive assembly. The linear drive assembly is located outside the vacuum chamber cavity, and the linear drive assembly can feedback the axial pressure acting on the transmission rod.

[0009] As a result, the vacuum chamber cavity can enclose a completely sealed cavity, and the heating component for heating one end of the component under test and the pushing component for placing the component under test are both arranged in the vacuum chamber cavity, and the transmission mechanism for applying interface pressure is located outside the vacuum chamber cavity, ensuring that the transmission rod leaks when passing through the vacuum chamber. While meeting the high vacuum sealing requirements, it can reduce heat radiation loss and avoid the situation where the transmission mechanism for applying interface pressure is heated to room temperature. It will be able to simulate the real environment in the nuclear fusion vacuum chamber and simulate the contact thermal conductivity test environment of the component connection interface in the vacuum chamber.

[0010] When in use, the component under test is placed on the push component, and the cooling medium is input into the cooling medium containing structure on the back pressure component. After the vacuum chamber cavity is closed, it is evacuated so that the vacuum degree in the vacuum chamber reaches the experimental value. At the same time, the linear drive component drives the transmission to push the push component toward the back pressure component, so that the upper end of the component under test is in contact with the back pressure component until the axial pressure of the transmission rod fed back by the linear drive component reaches the experimental value, and the upper end of the component under test is heated by the heating component, so that a significant temperature difference is formed at both ends of the component under test, which is convenient for subsequent analysis of the contact interface thermal conductivity test data.

[0011] In summary, the transmission structure for high-temperature detection of interface contact thermal conductivity provided by the present invention can simulate the test environment of the interface contact thermal conductivity of components connected within the vacuum chamber, and is convenient for accurately obtaining the contact thermal conductivity of heat transfer components within the vacuum chamber through experimental measurement means. It can be used for testing and studying the interface contact thermal conductivity of high-temperature tested connection components within the vacuum chamber of a magnetic confinement nuclear fusion device or other related technical fields under a high vacuum environment, so as to accumulate basic experimental data under such conditions, and further provide data support for verifying and optimizing the design of high-temperature heat transfer structures of components within the vacuum chamber of a magnetic confinement nuclear fusion device, and effectively promote the development of high-temperature and high-vacuum technologies at home and abroad.

[0012] In an optional embodiment of the present application, the heating component includes a heater and a heat conduction component, both of which are installed on the back pressure component, and the heat conduction component can transfer the heat generated by the heater to the corresponding end of the component under test to avoid displacement or damage of the heating component under the pressure of the component under test.

[0013] In an optional embodiment of the present application, the heater is installed on a side of the back pressure component away from the pushing component, the heat conduction component is embedded in the back pressure component, and one end of the heat conduction component is abutted against the heating section of the heater, and the other end can abut against the corresponding end of the component under test, so as to ensure that the heating component can effectively heat the corresponding end of the component under test.

[0014] In an optional embodiment of the present application, a plurality of guide rods are arranged in the vacuum chamber cavity, and the length direction of the guide rods is parallel to the moving direction of the transmission rod; one end of the guide rod is connected to the back pressure component, and the other end is fixedly connected to the vacuum chamber cavity, and the pushing component is slidably connected to the guide rods to ensure the stability of the pushing component during movement.

[0015] In an optional embodiment of the present application, a supporting and connecting component is also provided in the vacuum chamber cavity, and the supporting and connecting component is fixedly connected to the vacuum chamber cavity through a plurality of first supporting rods, and one end of the guide rod away from the back pressure component is fixedly connected to the supporting and connecting component to facilitate fixing the back pressure component in the vacuum chamber cavity.

[0016] In an optional embodiment of the present application, the push assembly further includes a mounting connection component, the mounting connection component is fixedly connected to the first support rod, and the linear drive assembly is mounted on the mounting connection component to facilitate connecting the push assembly to the vacuum chamber cavity.

[0017] In an optional embodiment of the present application, a plurality of second support rods are arranged at circumferential intervals on the mounting connection portion, and the length direction of the plurality of second support rods is parallel to the length direction of the transmission rod; the linear drive assembly includes a rotary driver and a linear drive mechanism, the rotary driver is transmission-connected to the linear drive mechanism, the linear drive mechanism is transmission-connected to the transmission rod, and the linear drive assembly is fixedly connected to the second support rods to ensure that there is sufficient parallelism between the guide rod and the transmission linear drive assembly to avoid jamming of the push assembly, and also to ensure that the linear drive assembly can accurately feedback the axial pressure acting on the transmission rod.

[0018] In an optional embodiment of the present application, an elastic force transmission component is arranged between the linear drive mechanism and the transmission rod; the elastic force transmission component includes a first connecting component and a second connecting component arranged at intervals, and the first connecting component and the second connecting component are both slidably connected to the second support rod; the first connecting component is fixedly connected to the force transmission rod, and the second connecting component is fixedly connected to the output end of the linear drive mechanism, and a force transmission spring is arranged between the first connecting component and the second connecting component, so that the transmission spring can absorb the fluctuations generated when each component expands and contracts due to temperature fluctuations, thereby reducing the fluctuation amplitude of the interface pressure caused by the temperature fluctuations of the measured components and other structural parts, thereby improving the reliability and accuracy of the test results.

[0019] In an optional embodiment of the present application, the linear drive mechanism includes a rotary drive and a turbine top rod, the rotary drive is transmission-connected to the turbine top rod, one end of the turbine top rod is fixedly connected to the second connecting component, and a pressure sensor is directly provided between the turbine top rod and the second connecting component to ensure that the linear drive assembly can provide real-time feedback on the axial pressure acting on the transmission rod.

[0020] In an optional embodiment of the present application, the push assembly also includes a retractable sealing sleeve, which is disposed on the outside of the transmission rod, and one end of the retractable sealing sleeve is sealed and fixedly connected to the rod portion of the transmission rod, and the other end is sealed and fixedly connected to the vacuum chamber cavity, so as to seal the gap between the transmission rod and the vacuum chamber cavity through the retractable sealing sleeve, thereby ensuring that the transmission rod can be relative to the vacuum chamber cavity while ensuring that the sealing of the vacuum chamber cavity meets high vacuum requirements.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] 1. The transmission structure for high-temperature detection of interface contact thermal conductivity provided by the present invention comprises a vacuum chamber cavity, a transmission rod and a linear drive assembly. A back pressure component, a heating assembly and a push component are arranged in the vacuum chamber cavity. The back pressure component can limit one end of the component to be measured, and the heating assembly can heat the end of the component to be measured that is facing the back pressure component. The push component and the back pressure component are arranged at intervals and are adapted to have a cooling medium accommodating structure. One end of the transmission rod penetrates into the vacuum chamber cavity and is transmission-connected with the push component. The transmission rod slides and is sealingly connected to the vacuum chamber cavity. The other end of the transmission rod is transmission-connected with the linear drive assembly. The linear drive assembly is located outside the vacuum chamber cavity, and the linear drive assembly can feedback the axial pressure acting on the transmission rod, so that the vacuum chamber cavity can enclose a completely sealed cavity, and the heating assembly for heating one end of the component to be measured The pushing parts for placing the components under test are arranged in the vacuum chamber cavity, and the transmission mechanism for applying interface pressure is located outside the vacuum chamber cavity, to ensure that the transmission rod leaks when passing through the vacuum chamber, and to reduce heat radiation loss while meeting the high vacuum sealing requirements. At the same time, it avoids the situation where the transmission mechanism for applying interface pressure is heated to room temperature, and will be able to simulate the real environment in the nuclear fusion vacuum chamber and the test environment of the interface contact thermal conductivity of the components connected in the vacuum chamber. It can be used for the interface contact thermal conductivity test research of the high-temperature tested connecting components in the vacuum chamber of the magnetic confinement nuclear fusion device or other related technical fields under high vacuum environment, so as to accumulate basic experimental data under this condition, and then provide data support for verifying and optimizing the high-temperature heat transfer structure design of the components in the vacuum chamber of the magnetic confinement nuclear fusion device, and effectively promote the development of high temperature and high vacuum technology at home and abroad.

[0023] 2. The transmission structure for high-temperature detection of interface contact thermal conductivity provided by the present invention has a heating component that can heat one end of the component under test that is facing the back pressure component, and a pushing component that supports the other end of the component under test and is adapted to have a cooling medium containing structure, so that during the test, a significant temperature difference is formed at both ends of the component under test, which facilitates the subsequent analysis of the contact interface thermal conductivity test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] In the attached picture:

[0026] Figure 1 It is a schematic structural diagram of a transmission structure for high-temperature detection of interface contact thermal conductivity according to an embodiment of the present invention.

[0027] Marks and corresponding parts names in the attached drawings:

[0028] 1-blind flange; 2-vacuum chamber cavity; 3-heater; 4-back pressure component; 5-heat conduction component; 6-vacuum chamber discharge window; 7-first measured component; 8-guide rod; 9-second measured component; 10-push component; 11-cooling medium containing structure; 12-transmission rod; 13-support connection component; 14-first support rod; 15-vacuum chamber window flange; 16-vacuum chamber sealing flange; 17-retractable sealing sleeve; 18-installation connection component; 19-second support rod; 20-axial dynamic flange; 21-first connecting component; 22-spring; 23-second connecting component; 24-motor dynamic flange; 25-turbine push rod; 26-rotation drive. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0030] In the description of the embodiments of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or is the orientation or positional relationship in which the device of the application is usually placed when in use, or is the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. At the same time, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example

[0032] Combination Figure 1 The present embodiment provides a transmission structure for high-temperature detection of interface contact thermal conductivity, comprising: a vacuum chamber component, the vacuum chamber component comprising a vacuum chamber cavity 2, a back pressure component 4, a heating component and a push component 10 are arranged in the vacuum chamber cavity 2, the back pressure component 4 can limit one end of the component under test, the heating component can heat the end of the component under test facing the back pressure component 4, the push component 10 is spaced apart from the back pressure component 4, the push component 10 is used to support the other end of the component under test, and the push component 10 is adapted to be equipped with a cooling medium accommodating structure 11; a push component 10 is provided in a manner similar to that of a vacuum chamber component. The push assembly includes a transmission rod 12 and a linear drive assembly, one end of the transmission rod 12 penetrates into the vacuum chamber cavity 2 and is transmission-connected to the push component 10, the transmission rod 12 is slidably and sealedly connected to the vacuum chamber cavity 2, and the other end of the transmission rod 12 is transmission-connected to the linear drive assembly, the linear drive assembly is located outside the vacuum chamber cavity 2, and the linear drive assembly can feedback the axial pressure on the transmission rod 12; wherein, the action of the linear drive assembly can drive the push component 10 to move toward the back pressure component 4 to apply the corresponding test pressure to the component under test.

[0033] It is understandable that, in order to simulate the magnetic confinement nuclear fusion device, the vacuum chamber cavity 2 is usually cylindrical, with a diameter of 200-600mm and a wall thickness greater than 3mm, and is made of stainless steel, such as a stainless steel cylindrical structure with a diameter of 400mm and a wall thickness of 5mm. At the same time, the vacuum chamber cavity 2 is usually placed horizontally or vertically when in use, and a blind flange 1 and a vacuum chamber window flange 15 are correspondingly arranged on the upper and lower sides of the vacuum chamber cavity 2, and a vacuum chamber discharge window 6 is arranged at one axial end of the vacuum chamber cavity 2.

[0034] It can be understood that the blind flange 1 is mainly used to install various components or temporarily used in the experimental stage, such as an observation window, a cooling window, or an installation window, etc. The vacuum chamber discharge window 6 is mainly used to place the measured component (the first measured component 7 and the second measured component 9 connected), and at the same time provide an installation channel and an operating space for the structural installation in the vacuum chamber. Generally speaking, the measured component is composed of two completely identical cylindrical components, and each measured component is designed with a multi-thermocouple temperature measurement hole for measuring the temperature gradient.

[0035] In this embodiment, the blind flange 1 and the vacuum chamber window flange 15 are sealed by copper gaskets or other flexible metals, and the vacuum chamber discharge window 6 (diameter φ400) is double-sealed by fluororubber or aluminum coil, or double-sealed by other rubber and other flexible metals. Among them, the fluororubber seal is mainly used for the condition that the vacuum chamber window temperature is not higher than 200°C, and the aluminum coil step seal is mainly used for the condition that the vacuum chamber window temperature is higher than 200°C.

[0036] Recombination Figure 1 A plurality of guide rods 8 are arranged in the vacuum chamber cavity 2, and the length direction of the guide rods 8 is parallel to the moving direction of the transmission rod 12; one end of the guide rod 8 is connected to the back pressure component 4, and the other end is fixedly connected to the vacuum chamber cavity 2, and the pushing component 10 is slidably connected to the guide rod 8 to ensure the stability of the pushing component 10 during the movement.

[0037] Specifically, a supporting and connecting component 13 is also provided in the vacuum chamber cavity 2, and the supporting and connecting component 13 is fixedly connected to the vacuum chamber cavity 2 through multiple first supporting rods 14, and one end of the guide rod 8 away from the back pressure component 4 is fixedly connected to the supporting and connecting component 13, so as to fix the back pressure component 4 in the vacuum chamber cavity 2.

[0038] It should be understood that the supporting connection component 13 is used to fix the guide rod 8 and the first support rod 14, and the guide rod 8 is usually provided with 4 and the first support rod 14 is usually provided with 2. Of course, the guide rod 8 and the first support rod 14 can also be other numbers. The vacuum chamber window flange 15 is provided with a penetration function of the first support rod 14 and the transmission rod 12 in the middle. The first support rod 14 and the vacuum chamber window flange 15 are fixed by welding, and the transmission rod 12 is not directly connected to the vacuum chamber window flange 15.

[0039] Specifically, the push assembly also includes a retractable sealing sleeve 17, which is sleeved on the outside of the transmission rod 12, and one end of the retractable sealing sleeve 17 is sealed and fixedly connected to the rod portion of the transmission rod 12, and the other end is sealed and fixedly connected to the vacuum chamber cavity 2, so as to seal the gap between the transmission rod 12 and the vacuum chamber cavity 2 through the retractable sealing sleeve 17, thereby ensuring that the transmission rod 12 can be relative to the vacuum chamber cavity 2 while ensuring that the sealing of the vacuum chamber cavity 2 meets the high vacuum requirement.

[0040] It can be known that the retractable sealing sleeve 17 can be an accordion-type folding tube, a rubber tube or other sleeve. In this embodiment, the retractable sealing sleeve 17 tube is a metal bellows, the upper end of which is sealed and connected to the vacuum chamber cavity 2 through the vacuum chamber sealing flange 16, and the lower end is welded and fixed to the rod part of the transmission rod 12 to ensure the high vacuum sealing requirements in the vacuum chamber cavity 2.

[0041] For the heating component, the heating component includes a heater 3 and a heat conduction component 5, both of which are installed on the back pressure component 4, and the heat conduction component 5 can transfer the heat generated by the heater 3 to the corresponding end of the component under test to avoid the heating component from being offset or damaged under the pressure of the component under test.

[0042] Specifically, the heater 3 is installed on the side of the back pressure component 4 away from the pushing component 10, and the heat conduction component 5 is embedded in the back pressure component 4, and one end of the heat conduction component 5 is abutted against the heating section of the heater 3, and the other end can abut against the corresponding end of the component under test, so as to ensure that the heating component can effectively heat the corresponding end of the component under test.

[0043] In this embodiment, the heater 3 adopts a disc-type resistance heating, and is fixed to the back pressure component 4 by bolts, and a multi-layer vacuum insulation cover structure is attached to the outer surface to effectively reduce heat loss. The heat conduction component 5 adopts a copper material with high thermal conductivity, and is embedded in the back pressure component 4. The embedding area can be appropriately increased, but it does not exceed the contact area between the heater 3 and the back pressure component 4. Therefore, copper with high thermal conductivity is used as a heat transfer medium to form an approximately unidirectional heat flow, thereby reducing the loss on the heat transfer path.

[0044] The cooling medium containing structure 11 on the pushing component 10 is usually on the side of the pushing component 10 away from the component under test (the first component under test 7). In the present embodiment, a water-cooled box structure is welded to the pushing component 10 to form the cooling medium containing structure 11. Of course, other methods can also be used to form the cooling medium containing structure 11.

[0045] Continue to combine Figure 1 The push assembly also includes a mounting connection component 18, which is fixedly connected to the first support rod 14, and the linear drive assembly is mounted on the mounting connection component 18 to facilitate connecting the push assembly to the vacuum chamber cavity 2.

[0046] On this basis, a plurality of second support rods 19 are arranged at circumferential intervals on the mounting connection portion, and the length direction of the plurality of second support rods 19 is parallel to the length direction of the transmission rod 12; the linear drive assembly includes a rotary driver 26 and a linear drive mechanism, the rotary driver 26 is transmission-connected to the linear drive mechanism, the linear drive mechanism is transmission-connected to the transmission rod 12, and the linear drive assembly is fixedly connected to the second support rods 19 to ensure that there is sufficient parallelism between the guide rod 8 and the transmission linear drive assembly to avoid jamming of the push assembly, and also to ensure that the linear drive assembly can accurately feedback the axial pressure acting on the transmission rod 12.

[0047] Furthermore, an elastic force transmission component is arranged between the linear drive mechanism and the transmission rod 12; the elastic force transmission component includes a first connecting component 21 and a second connecting component 23 which are arranged at intervals, and the first connecting component 21 and the second connecting component 23 are both slidably connected to the second support rod 19; the first connecting component 21 is fixedly connected to the force transmission rod, the second connecting component 23 is fixedly connected to the output end of the linear drive mechanism, and a force transmission spring 22 is arranged between the first connecting component 21 and the second connecting component 23, so that the transmission spring 22 can absorb the fluctuations generated when each component expands and contracts due to temperature fluctuations, thereby reducing the influence of the fluctuations of the measured components and other structural parts (such as the transmission rod 12) on the interface pressure during thermal expansion and contraction, thereby stabilizing the interface pressure and then improving the reliability and accuracy of the test results.

[0048] In addition, the linear drive mechanism includes a rotary driver 26 and a turbine top rod 25, the rotary driver 26 is transmission-connected to the turbine top rod 25, one end of the turbine top rod 25 is fixedly connected to the second connecting component 23, and pressure sensors are directly provided between the turbine top rod 25 and the second connecting component 23 to ensure that the linear drive assembly can provide real-time feedback on the axial pressure acting on the transmission rod 12.

[0049] In this embodiment, the rotary driver 26 mainly provides a power source, which can be a motor, a hydraulic motor, etc., and an adjustable frequency motor is generally selected. At the same time, the first connecting part and the second connecting part 23 are both flange structures, a shaft dynamic flange 20 is provided on the transmission rod 12, and a motor dynamic flange 24 is provided on the upper end of the turbine top rod 25, and the force transmission spring 22 is welded with the first connecting part 21 and the second connecting part 23, and the first connecting part and the second connecting part 23 are fixed to the corresponding shaft dynamic flange 20 and motor dynamic flange 24 by bolts. In addition, the end bolt connection position of the guide rod 8, the first support rod 14 and the second support rod 19 adopts an adjustable double nut structure, which is convenient for adjusting the installation accuracy.

[0050] Therefore, in the process of applying pressure by the pushing assembly, the force transmission loss is relatively small, and the loss is mainly due to the gravity of the transmission components, the friction force during axial sliding between the second support rod 19 and the axial dynamic flange 20 and the motor dynamic flange 24, and the friction force between the pushing component 10 and the guide rod 8.

[0051] In summary, the transmission structure for high-temperature detection of interface contact thermal conductivity provided in this embodiment includes a vacuum chamber cavity 2, a transmission rod 12 and a linear drive assembly. A back pressure component 4, a heating assembly and a push component 10 are arranged in the vacuum chamber cavity 2. The back pressure component 4 can limit one end of the component to be measured, and the heating assembly can heat the end of the component to be measured that is facing the back pressure component 4. The push component 10 is spaced apart from the back pressure component 4 and is adapted to have a cooling medium containing structure 11. One end of the transmission rod 12 penetrates into the vacuum chamber cavity 2 and is transmission-connected to the push component 10. The transmission rod 12 is slidingly and sealingly connected to the vacuum chamber cavity 2. The other end of the transmission rod 12 is transmission-connected to the linear drive assembly. The linear drive assembly is located outside the vacuum chamber cavity 2, and the linear drive assembly can feedback the axial pressure acting on the transmission rod 12.

[0052] Among them, the vacuum chamber cavity 2 can enclose a completely sealed cavity, and the heating component for heating one end of the component under test and the pushing component 10 for placing the component under test are both arranged in the vacuum chamber cavity 2, and the transmission mechanism for applying interface pressure is located outside the vacuum chamber cavity, ensuring that the transmission rod 12 leaks when passing through the vacuum chamber. While meeting the high vacuum sealing requirements, it can reduce heat radiation loss and avoid the situation where the transmission mechanism for applying interface pressure is heated to room temperature. It will be able to simulate the real environment in the nuclear fusion vacuum chamber and simulate the contact thermal conductivity test environment of the connection interface of the components in the vacuum chamber.

[0053] It should be noted that, in order to obtain reliable and accurate interface contact thermal conductivity values, experimental measurement methods are usually used, and this embodiment can perform steady-state experiments. Before the formal experiment, a force calibration test must be performed to ensure that the data measured by the pressure sensor is true and reliable.

[0054] When in use, the component under test is placed on the pushing component 10, and the cooling medium is input into the cooling medium containing structure 11 on the back pressure component 4. After the vacuum chamber cavity 2 is closed, it is evacuated so that the vacuum degree in the vacuum chamber reaches the experimental value. At the same time, the linear drive component drives the transmission to push the pushing component 10 toward the back pressure component 4, so that the upper end of the component under test is in contact with the back pressure component until the axial pressure of the transmission rod 12 fed back by the linear drive component reaches the experimental value, and the upper end of the component under test is heated by the heating component, so that a significant temperature difference is formed at both ends of the component under test, which is convenient for subsequent analysis of the contact interface thermal conductivity test data.

[0055] In summary, the transmission structure for high-temperature detection of interface contact thermal conductivity provided in this embodiment can simulate the test environment of interface contact thermal conductivity of components in a vacuum chamber, and is convenient for accurately obtaining the contact thermal conductivity of heat transfer components in a vacuum chamber through experimental measurement means, and has the characteristics of high heating temperature, ultra-high vacuum and high sensitivity. It can be used for testing and studying the interface contact thermal conductivity of high-temperature tested connection components in a vacuum chamber in a magnetic confinement nuclear fusion device or other related technical fields under a high vacuum environment, so as to accumulate basic experimental data under such conditions, and further provide data support for verifying and optimizing the design of high-temperature heat transfer structures of components in a vacuum chamber in a magnetic confinement nuclear fusion device, and effectively promote the development of high-temperature and high-vacuum technologies at home and abroad.

[0056] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A transmission structure for high temperature detection of interface contact thermal conductivity, comprising: A vacuum chamber assembly, the vacuum chamber assembly comprising a vacuum chamber cavity (2), a back pressure component (4), a heating component and a push component (10) being arranged in the vacuum chamber cavity (2), the back pressure component (4) being capable of limiting one end of a component under test, the heating component being capable of heating the end of the component under test facing the back pressure component (4), the push component (10) being spaced apart from the back pressure component (4), the push component (10) being used to support the other end of the component under test, and the push component (10) being adapted to be equipped with a cooling medium containing structure (11); A push assembly, the push assembly comprising a transmission rod (12) and a linear drive assembly, one end of the transmission rod (12) penetrates into the vacuum chamber cavity (2) and is transmission-connected to the push component (10), the transmission rod (12) is slidably and sealingly connected to the vacuum chamber cavity (2), the other end of the transmission rod (12) is transmission-connected to the linear drive assembly, the linear drive assembly is located outside the vacuum chamber cavity (2), and the linear drive assembly can feedback the axial pressure acting on the transmission rod (12); The action of the linear drive component can drive the push component (10) to move toward the back pressure component (4) so ​​as to apply a corresponding test pressure to the component under test.

2. The transmission structure for high temperature detection of interface contact thermal conductivity according to claim 1, characterized in that: The heating component comprises a heater (3) and a heat conduction component (5), wherein the heater (3) and the heat conduction component (5) are both mounted on the back pressure component (4), and the heat conduction component (5) is capable of transferring the heat generated by the heater (3) to the corresponding end of the component under test.

3. The transmission structure for high temperature detection of interface contact thermal conductivity according to claim 2, characterized in that: The heater (3) is installed on a side of the back pressure component (4) away from the pushing component (10), and the heat conduction component (5) is embedded in the back pressure component (4), and one end of the heat conduction component (5) abuts against the heating section of the heater (3), and the other end can abut against the end corresponding to the component under test.

4. The transmission structure for high temperature detection of interface contact thermal conductivity according to claim 1, characterized in that: A plurality of guide rods (8) are arranged in the vacuum chamber cavity (2), and the length direction of the guide rods (8) is parallel to the moving direction of the transmission rod (12); One end of the guide rod (8) is connected to the back pressure component (4), and the other end is fixedly connected to the vacuum chamber body (2); the push component (10) is slidably connected to the guide rod (8).

5. The transmission structure for high temperature detection of interface contact thermal conductivity according to claim 4, characterized in that: A supporting connection component (13) is also provided in the vacuum chamber cavity (2); the supporting connection component (13) is fixedly connected to the vacuum chamber cavity (2) via a plurality of first supporting rods (14); and one end of the guide rod (8) away from the back pressure component (4) is fixedly connected to the supporting connection component (13).

6. The transmission structure for high-temperature detection of interface contact thermal conductivity according to claim 5, characterized in that: The push assembly further comprises a mounting connection component (18), wherein the mounting connection component (18) is fixedly connected to the first support rod (14), and the linear drive assembly is mounted on the mounting connection component (18).

7. The transmission structure for high temperature detection of interface contact thermal conductivity according to claim 6, characterized in that: A plurality of second support rods (19) are arranged at intervals in the circumferential direction of the mounting connection portion, and the length direction of the plurality of second support rods (19) is parallel to the length direction of the transmission rod (12); The linear drive assembly comprises a rotary drive (26) and a linear drive mechanism, the rotary drive (26) is transmission-connected to the linear drive mechanism, the linear drive mechanism is transmission-connected to the transmission rod (12), and the linear drive assembly is fixedly connected to the second support rod (19).

8. The transmission structure for high temperature detection of interface contact thermal conductivity according to claim 7, characterized in that: An elastic force transmission component is provided between the linear drive mechanism and the transmission rod (12); The elastic force transmission component comprises a first connecting component (21) and a second connecting component (23) which are arranged at an interval, and the first connecting component (21) and the second connecting component (23) are both slidably connected to the second support rod (19); The first connecting component (21) is fixedly connected to the force transmission rod, the second connecting component (23) is fixedly connected to the output end of the linear drive mechanism, and a force transmission spring (22) is provided between the first connecting component (21) and the second connecting component (23).

9. The transmission structure for high temperature detection of interface contact thermal conductivity according to claim 8, characterized in that: The linear drive mechanism comprises a rotary drive (26) and a turbine top rod (25), wherein the rotary drive (26) is transmission-connected to the turbine top rod (25), one end of the turbine top rod (25) is fixedly connected to the second connecting component (23), and a pressure sensor is directly provided between the turbine top rod (25) and the second connecting component (23).

10. The transmission structure for high temperature detection of interface contact thermal conductivity according to any one of claims 1 to 9, characterized in that: The push assembly further comprises a retractable sealing sleeve (17), which is sleeved outside the transmission rod (12), and one end of the retractable sealing sleeve (17) is sealed and fixedly connected to the rod portion of the transmission rod (12), and the other end of the retractable sealing sleeve (17) is sealed and fixedly connected to the vacuum chamber cavity (2), so as to seal the gap between the transmission rod (12) and the vacuum chamber cavity (2) through the retractable sealing sleeve (17).

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