An assembly tool for a capillary wick of a loop heat pipe and an assembly method thereof

Abstract

The application provides an assembly tool for a capillary core of a loop heat pipe and an assembly method thereof, and belongs to the technical field of loop heat pipes, and comprises a clamping tool, a guiding tool and a heating tool, the clamping tool comprises a conical screw and an expansion pipe, the guiding tool is internally provided with an introduction section, a guiding section and a positioning section, the heating tool comprises an outer heating ring and an inner heating ring, the inner heating ring is attached to the inside of the outer heating ring, the height of the outer heating ring is higher than that of the inner heating ring, and the height difference between the outer heating ring and the inner heating ring forms a placing groove for placing the guiding tool. The application completes interference assembly of the capillary core and the pipe shell by adopting the pipe shell thermal expansion and contraction method, clamps the capillary core by using the clamping tool, positions the capillary core and the pipe shell to the same axis by using the guiding tool, and heats the pipe shell by using the heating tool, so that the capillary core is accurately installed and efficiently assembled by using the three tools in combination.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of loop heat pipe, in particular to an assembly tool for capillary wick of loop heat pipe and an assembly method thereof. BACKGROUND

[0002] Loop heat pipe is a capillary pressure driven self-circulating two-phase fluid loop composed of evaporator, condenser, liquid reservoir, vapor line and liquid line. It has the advantages of large heat transfer, long heat transfer distance, one-way heat transfer, flexible layout, high reliability, long service life, excellent anti-gravity capability, etc. Loop heat pipe is an ideal solution for spacecraft platform large heat dissipation, high heat flux density device thermal control, precision temperature control, low temperature and deep cooling heat transfer, long distance and flexible heat transfer, etc.

[0003] The evaporator of the space-grade loop heat pipe is usually designed as a columnar structure, which is convenient for thermal coupling with the channel heat pipe network. The interference assembly of the capillary wick and the pipe shell of the columnar loop heat pipe evaporator is the core process link of the loop heat pipe manufacturing. The ideal interference assembly requires that the capillary wick is axially assembled in place, the capillary wick has uniform radial interference, the capillary wick outer surface is not scratched, and the capillary wick as a whole will not be shrunk by secondary sintering. At the same time, the assembly efficiency is high, and the tool adaptability is good.

[0004] The patent with application number 201010047482.8 discloses an assembly method for the interference assembly of the stainless steel pipe shell and the capillary wick in the loop heat pipe evaporator. In the patent, the assembly method of the capillary wick is the pipe shell thermal expansion and cold shrink method. In the assembly process of the capillary wick, the assembly tool has small heat capacity, the pipe shell cools down quickly when the heating furnace is opened for assembly, and the inner diameter of the pipe shell becomes smaller. The capillary wick will be heated to a certain extent during the assembly preparation in the heating furnace, and the outer diameter of the capillary wick becomes larger, so it is easy to cause the capillary wick to be not assembled in place in the axial direction, resulting in assembly failure. Each assembly tool can only assemble one capillary wick at a time, the tool changing cycle is long, and the assembly efficiency is low. The assembly tool can only adapt to one specification of evaporator, and the tool adaptability is poor.

[0005] The patent with application number 201610666748.4 discloses a loop heat pipe size tolerance capillary wick and shell assembly device and process method. In the disclosed content, the assembly method of the capillary wick is the pipe shell hydraulic deformation method. In the assembly process of the capillary wick, the pipe shell will squeeze the surface of the capillary wick when deformed, and the capillary wick surface will be scratched and blocked, resulting in assembly failure. After the pipe shell is deformed, it will rebound to a certain extent, so the capillary wick cannot produce uniform interference in the radial direction, resulting in assembly failure. At the same time, each assembly tool can only assemble one capillary wick at a time, the tool changing cycle is long, and the assembly efficiency is low. The assembly tool can only adapt to one specification of evaporator, and the tool adaptability is poor.

[0006] The patent with the application number 201910576785.X discloses a processing method of a capillary wick and an assembly method of the capillary wick and a tube shell. In the disclosed content, the assembly method of the capillary wick is a tube shell sintering forming method. In the assembly process, the outer diameter of the capillary wick is smaller than the inner diameter of the tube shell when naturally assembled; and a certain shrinkage is generated when the capillary wick is sintered after assembly, so that the capillary wick is separated from the inner wall of the tube shell, resulting in assembly failure. The sintering slurry of the capillary wick is sintered on the outer surface of the capillary wick after assembly, which causes the capillary wick to be blocked and results in assembly failure. SUMMARY

[0007] In order to solve the technical problems of poor tool adaptability, poor axial assembly of the capillary wick, poor uniformity of the capillary wick radial interference, capillary wick outer surface scratching causing blockage, and low assembly efficiency in the prior art loop heat pipe capillary wick assembly tool and method, the present application provides a capillary wick assembly tool for a loop heat pipe:

[0008] The capillary wick assembly tool comprises a clamping tool, a guide tool and a heating tool.

[0009] The clamping tool comprises a tapered screw and an expansion tube.

[0010] The expansion tube is sleeved on the tapered screw.

[0011] The guide tool is provided with an inlet section, a guide section and a positioning section.

[0012] The inlet section is arranged at the top of the guide tool and is used for accommodating the capillary wick.

[0013] The guide section is arranged in the middle of the guide tool and is used for adjusting the capillary wick.

[0014] The positioning section is arranged at the bottom of the guide tool and is used for positioning the capillary wick and the guide tool on the same axis.

[0015] The heating tool comprises an outer heating ring and an inner heating ring.

[0016] The inner heating ring is attached to the inside of the outer heating ring.

[0017] The height of the outer heating ring is higher than that of the inner heating ring, and the height difference between the outer heating ring and the inner heating ring forms a placing groove for placing the guide tool.

[0018] Preferably, the clamping tool further comprises a counterweight, which is mounted on the tapered screw.

[0019] Preferably, the heating tool further comprises a bottom plate, an outer height limiting block and an inner height limiting block.

[0020] The bottom plate is fixedly connected with the outer heating ring and the inner heating ring.

[0021] The outer height limiting block is connected to the bottom plate at one end and connected to the inner height limiting block at the other end.

[0022] Preferably, a first air hole is formed at the center of the bottom plate;

[0023] A second air hole is formed at the center of the outer height limiting block;

[0024] A third air hole is formed at the center of the inner height limiting block;

[0025] The first air hole is in communication with the second air hole and the third air hole.

[0026] Preferably, the tapered screw comprises a tapered head and a screw rod connected as a whole;

[0027] An outer thread is formed on the screw rod for mounting the counterweight;

[0028] A tail opening is formed at the bottom of the expansion tube, and the tail opening cooperates with the tapered head to clamp the capillary core.

[0029] Preferably, the counterweight comprises an upper segment center hole and a lower segment center hole;

[0030] An inner thread is formed in the upper segment center hole for cooperating with the outer thread.

[0031] Another aspect of the present application also provides an assembling method for a capillary core of a loop heat pipe,

[0032] The method comprises the following steps:

[0033] S1, installing the heating tool;

[0034] S2, heating the outer heating ring;

[0035] S3, heating the heating tool to T1, when the temperature of the heating tool reaches T1, low-pressure inert protective gas is introduced into the heating tool through the first air hole, and the tube shell is placed in the inner heating ring for heating until the tube shell is heated to a temperature T1;

[0036] S4, placing the guide tool in the placing groove, and automatically aligning the guide tool with the axis of the heating tool;

[0037] S5, extending the tapered screw into the center hole of the capillary core to clamp the capillary core;

[0038] S6, placing the capillary core into the lead-in section, and loading the capillary core into the tube shell under the action of gravity;

[0039] S7, taking out the guiding tool;

[0040] S8, taking out the assembled capillary core and the tube shell from the heating tool through the clamping tool;

[0041] S9, taking out the clamping tool from the capillary core, completing the interference assembly of the capillary core and the tube shell.

[0042] Preferably, the heating mode in step S2 is selected from one of electric heating, heating furnace heating, induction heating or salt bath heating.

[0043] Preferably, in step S3, the temperature T1 is 280-480°C.

[0044] Preferably, in step S3, the pressure of the low-pressure inert protective gas is 0.1-1.2 MPa.

[0045] The implementation of the present application can solve the technical problems of poor tool adaptability, poor axial assembly of the capillary core, poor uniformity of the radial interference of the capillary core, hole blocking caused by scratching of the outer surface of the capillary core and low assembly efficiency of the capillary core assembly tool and method of the loop heat pipe in the prior art. The present application adopts the heat expansion and contraction method of the tube shell to perform the interference assembly of the cylindrical loop heat pipe evaporator capillary core and the tube shell, uses the clamping tool to clamp the capillary core, uses the guiding tool to position the capillary core and the tube shell to the same axis, and uses the heating tool to heat the tube shell. The three tools are used in combination to make the capillary core installation accurate and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only one embodiment of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0047] Figure 1 It is a cross-sectional view of the assembly tool of the present application;

[0048] Figure 2 It is a cross-sectional view of the clamping tool of the present application;

[0049] Figure 3 It is a schematic view of the clamping tool of one embodiment of the present application;

[0050] Figure 4 It is a cross-sectional view of the guiding tool of the present application;

[0051] Figure 5A cross-sectional view of the heating tool of the present application;

[0052] Figure 6 A schematic diagram of the interference assembly process of the capillary core of the loop heat pipe of the present application;

[0053] Figure 7 A schematic diagram of the structure of the heating tool after step S3 of the present application;

[0054] Figure 8 A schematic diagram of the connection of the guiding tool and the heating tool after step S4 of the present application;

[0055] Figure 9 A schematic diagram of the structure of the capillary core clamped by the clamping tool when step S5 of the present application is implemented;

[0056] Figure 10 A schematic diagram of the connection of the various tools when the capillary core is assembled in step S6 of the present application;

[0057] Figure 11 A schematic diagram of the structure after the guiding tool is removed in step S7 of the present application;

[0058] Figure 12 A schematic diagram of the structure of the heating tool removed by the clamping tool when step S8 of the present application is implemented;

[0059] Figure 13 A schematic diagram of the structure of the capillary core after assembly.

[0060] In the above-mentioned drawings, the respective figure number marks represent:

[0061] 1, clamping tool

[0062] 1-1, conical screw

[0063] 1-1-1, conical head

[0064] 1-1-2, screw rod

[0065] 1-2, expansion tube

[0066] 1-2-1, tail opening

[0067] 1-3, counterweight

[0068] 1-3-1, upper center hole

[0069] 1-3-2, lower center hole

[0070] 2, guiding tool

[0071] 2-1, lead-in section

[0072] 2-2, guiding section

[0073] 2-3. Positioning Section

[0074] 3. Heating fixture

[0075] 3-1. Base Plate

[0076] 3-1-1, First vent

[0077] 3-2. External heating ring

[0078] 3-3. Inner heating ring

[0079] 3-4. External height limiting block

[0080] 3-4-1, Second vent

[0081] 3-5. Inner height limit block

[0082] 3-5-1, Third vent

[0083] 3-6. Placement slot

[0084] 4. Capillary core

[0085] 5. Tube shell Detailed Implementation

[0086] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0087] Example 1

[0088] In a specific embodiment 1, such as Figure 1 As shown, an assembly fixture for a loop heat pipe capillary wick includes a clamping fixture 1, a guiding fixture 2, and a heating fixture 3.

[0089] like Figure 2 and Figure 3As shown, the clamping tool 1 includes a tapered screw 1-1 and an expansion tube 1-2, the expansion tube 1-2 is sleeved on the tapered screw 1-1, the tapered screw 1-1 includes a tapered head 1-1-1 and a screw rod 1-1-2 arranged as a whole, wherein the screw rod 1-1-2 is provided with external threads (not marked in the figure), and the bottom of the expansion tube 1-2 is provided with a plurality of tail openings 1-2-1. The clamping tool 1 further includes a counterweight 1-3, the counterweight 1-3 includes an upper segment central hole 1-3-1 and a lower segment central hole 1-3-2, the upper segment central hole 1-3-1 is provided with internal threads (not marked in the figure) matched with the external threads of the screw rod 1-1-2, in the embodiment, the counterweight 1-3 is installed on the tapered screw 1-1 through threads, and in the embodiment, the inner diameter of the expansion tube 1-2 is slightly larger than the outer diameter of the screw rod 1-1-2 and slightly smaller than the outer diameter of the tapered head 1-1-1.

[0090] During assembly, the expansion tube 1-2 is first passed through the tapered screw 1-1, under the action of gravity, the expansion tube 1-2 falls at the bottom of the tapered screw 1-1, and then the counterweight 1-3 is assembled on the top of the expansion tube 1-2 through threaded connection.

[0091] In use, the clamping tool 1 is inserted into the inner hole of the capillary wick 4, the counterweight 1-3 is rotated, the counterweight 1-3 pushes the expansion tube 1-2 to move downward through the threaded connection between the counterweight 1-3 and the screw rod 1-1-2, the tail openings 1-2-1 of the expansion tube 1-2 are expanded under the action of the tapered head 1-1-1 and thus expand the capillary wick 4. At the same time, the counterweight 1-3 also serves to offset the rebound of the capillary wick 4 during interference assembly.

[0092] As shown in the figure, Figure 4 The guide tool 2 is provided with a guide-in segment 2-1, a guide segment 2-2 and a positioning segment 2-3, wherein the guide-in segment 2-1 is arranged at the top of the guide tool 2 and is used to accommodate the capillary wick 4, the guide segment 2-2 is arranged in the middle of the guide tool 2 and is used to align the capillary wick 4, and the positioning segment 2-3 is arranged at the bottom of the guide tool 2 and is used to position the capillary wick 4 and the guide tool 2 on the same axis.

[0093] As shown in the figure, Figure 5 The heating tool 3 includes an outer heating ring 3-2 and an inner heating ring 3-3, the inner heating ring 3-3 is installed in the inner part of the outer heating ring 3-2, the height of the outer heating ring 3-2 is higher than that of the inner heating ring 3-3, the outer heating ring 3-2 heats the inner heating ring 3-3 after obtaining heat from an external heat source, and the inner heating ring 3-3 heats the tube shell 5 after obtaining heat from the outer heating ring 3-2. The height difference between the outer heating ring 3-2 and the inner heating ring 3-3 forms a placing groove 3-6 for placing the guide tool 2, and the guide tool 2 and the axis of the heating tool 3 can be automatically aligned through the placing groove 3-6.

[0094] In a preferred embodiment, in order to adapt the assembly tool in the embodiment to different sizes of the capillary wick 4 and the tube shell 5, the heating tool 3 is also provided with a bottom plate 3-1, an outer height limiting block 3-4 and an inner height limiting block 3-5. The bottom plate 3-1 is fixedly connected with the outer heating ring 3-2 and the inner heating ring 3-3, one end of the outer height limiting block 3-4 is connected with the bottom plate 3-1, and the other end is connected with the inner height limiting block 3-5, wherein the outer height limiting block 3-4 is used to adjust the axial assembly position of the tube shell 5, and the inner height limiting block 3-5 is used to adjust the axial assembly position of the capillary wick 4.

[0095] For different sizes of the capillary wick 4 and the tube shell 5, the inner heating ring 3-3 can be adjusted according to the outer diameter of the tube shell 5, the outer height limiting block 3-4 can be adjusted according to the length of the tube shell 5, and the inner height limiting block 3-5 can be adjusted according to the installation position of the capillary wick 4. The heating tool 3 can adapt to the interference assembly of capillary wicks 4 and tube shells 5 of various specifications of columnar loop heat pipe evaporators, and has good tool adaptability.

[0096] In a preferred embodiment, a first air hole 3-1-1 is formed in the center of the bottom plate 3-1, a second air hole 3-4-1 is formed in the center of the outer height limiting block 3-4, and a third air hole 3-5-1 is formed in the center of the inner height limiting block 3-5, and the first air hole 3-1-1 is in communication with the second air hole 3-4-1 and the third air hole 3-5-1, and the diameters are equal. The first air hole 3-1-1, the second air hole 3-4-1 and the third air hole 3-5-1 in communication can introduce inert protective gas and discharge compressed air during interference assembly.

[0097] Embodiment 2

[0098] In a specific embodiment 2, a method for assembling a loop heat pipe capillary wick, as shown in Figure 6 , comprises S1, installing a heating tool 3; S2, heating the heating tool 3; S3, heating the tube shell 5; S4, installing a guide tool 2; S5, installing a clamping tool 1; S6, interference assembly of the capillary wick 4 and the tube shell 5; S7, removing the guide tool 2; S8, removing the capillary wick 4 and the tube shell 5; S9, removing the clamping tool 1, and specifically comprises the following contents:

[0099] S1, as shown in Figure 5 , assembling the bottom plate 3-1, the outer heating ring 3-2, the inner heating ring 3-3, the outer height limiting block 3-4 and the inner height limiting block 3-5 together.

[0100] S2, heating the heating tool 3, in this embodiment, the outer heating ring 3-2 is heated by electric heating.

[0101] S3, as shown in Figure 7As shown, the tube shell 5 is placed into the heating tool 3, and the heating tool is heated to T1. In this embodiment, T1 is 450℃, and the heating temperature is detected by an infrared thermal imager. When the heating temperature reaches 450℃, nitrogen gas with a pressure of 0.1 MPa and a purity greater than 99.9% is introduced into the first air hole 3-1-1 of the bottom plate 3-1, and the tube shell 5 is placed into the inner heating ring 3-3 for heating until the tube shell 5 is heated to 450℃. The time of the entire heating process can be maintained at 10-30 seconds, and in this embodiment, the heating time is 25 seconds.

[0102] S4, as shown in Figure 8 The guide tool 2 is placed in the placement groove 3-6, and the guide tool 2 is automatically aligned with the axis of the heating tool 3 through the placement groove 3-6.

[0103] S5, as shown in Figure 9 The conical screw 1-1 is inserted into the center hole of the capillary core 4, and the counterweight 1-3 is rotated. The counterweight 1-3 pushes the expansion tube 1-2 downward through the threaded connection with the screw rod 1-1-2, and the tail opening 1-2-1 of the expansion tube 1-2 is expanded under the action of the conical large head 1-1-1, so as to expand and clamp the capillary core 4. In this embodiment, the depth of the conical screw 1-1 into the capillary core 4 is limited by the counterweight 1-3, and the position of the counterweight 1-3 can be adjusted by the worker to adjust the length of the conical screw 1-1 into the capillary core 4.

[0104] S6, as shown in Figure 10 The capillary core 4 is lifted by the clamping tool 1 and placed into the guide section 2-1 of the guide tool 2, and the capillary core 4 in a free state is loaded into the pre-set position in the tube shell 5 under the action of gravity;

[0105] S7, as shown in Figure 11 After the capillary core 4 is loaded into the tube shell 5, the guide tool 2 is removed from the heating tool 3;

[0106] S8, as shown in Figure 12 The assembled capillary core 4 and tube shell 5 are taken out of the heating tool 3 by the clamping tool 1;

[0107] S9, as shown in Figure 13 The counterweight 1-3 is rotated in the opposite direction, and the expansion tube 1-2 is withdrawn from the conical large head 1-1-1. At this time, the clamping tool 1 is no longer expanded and clamped with the capillary core 4, and the clamping tool 1 is taken out of the capillary core 4. Thus, the interference assembly of the capillary core 4 and the tube shell 5 is completed.

[0108] The above embodiment is the assembly of a single set of capillary core 4 and tube shell 5. Workers can complete the rapid batch interference assembly of multiple sets of capillary core 4 and tube shell 5 by repeating steps S3-S9.

[0109] The beneficial effects of the present application are:

[0110] 1. Axial assembly of the capillary core 4: The axial assembly position is constrained by the outer height limiting block 3-4 and the inner height limiting block 3-5, ensuring that the capillary core 4 is assembled in place and accurately.

[0111] 2. Uniform radial interference of the capillary core 4: The pipe shell 5 is uniformly heated to a specified temperature by the inner heating ring 3-3 and the outer heating ring 3-2, and the pipe shell 5 uniformly expands under heat, ensuring that the radial interference of the capillary core 4 is uniform.

[0112] 3. No scratching of the outer surface of the capillary core 4: The capillary core 4 is positioned on the same axis as the guide tool 2 by the guide tool 2, and the guide tool 2 is aligned with the axis of the heating tool 3 by the installation position between the inner heating ring 3-3 and the outer heating ring 3-2 on the heating tool 3. During assembly, the capillary core 4 is loaded into the pre-set position in the pipe shell 5 by gravity, ensuring that the outer surface of the capillary core 4 is not scratched during assembly.

[0113] 4. The capillary core 4 as a whole will not be secondarily sintered and shrunk: After assembly is completed, the capillary core 4 and the pipe shell 5 are taken out of the heating tool 3 by the clamping tool 1. The capillary core 4 does not reach the temperature that causes secondary sintering, and the capillary core 4 as a whole will not be secondarily sintered and shrunk.

[0114] 5. High efficiency of tool assembly: The heating time of the pipe shell 5 is not more than 30s, the installation time of the guide tool 2 is not more than 10s, the installation time of the clamping tool 1 is not more than 20s, the interference assembly time is not more than 10s, the guide tool 2 removal time is not more than 10s, the evaporator removal time is not more than 10s, and the clamping tool 1 removal time is not more than 10s. In the case of complete heating of the heating tool 3, the total time of complete assembly link in serial operation is not more than 100s, and in parallel operation, the total time of complete assembly link is not more than 70s. Moreover, the assembly tool is suitable for automatic production, and the efficiency of automatic production is high, and the product assembly yield can reach 100%.

[0115] 6. Good adaptability of the tool: The inner heating ring 3-3 can be adjusted according to the outer diameter of the pipe shell 5, the outer height limiting block 3-4 can be adjusted according to the length of the pipe shell 5, the inner height limiting block 3-5 can be adjusted according to the installation position of the capillary core 4, and the heating tool 3 can be adapted to the interference assembly of the capillary core 4 and the pipe shell 5 of various specifications of columnar loop heat pipe evaporators, and the tool has good adaptability.

Claims

1. An assembly tooling for a capillary wick of a loop heat pipe, characterized in that, This includes clamping fixtures, guiding fixtures, and heating fixtures; The clamping fixture includes a tapered screw and an expansion tube; The expansion tube is fitted onto the tapered screw; The guide fixture is provided with an inlet section, a guide section and a positioning section; The inlet section is located at the top of the guide fixture and is used to receive the capillary wick; The guide section is located in the middle of the guide fixture and is used to straighten the capillary core; The positioning section is disposed at the bottom of the guide fixture and is used to position the capillary core and the guide fixture on the same axis. The heating fixture includes an outer heating ring and an inner heating ring; The inner heating ring is fitted and installed inside the outer heating ring; The outer heating ring is higher than the inner heating ring, and the height difference between the outer heating ring and the inner heating ring forms a placement groove for placing the guide fixture.

2. The assembly tooling for a capillary wick of a loop heat pipe according to claim 1, characterized in that, The clamping fixture also includes a counterweight, which is mounted on the tapered screw.

3. The assembly tooling for a capillary wick of a loop heat pipe according to claim 2, characterized in that, The heating fixture also includes a base plate, an outer height limiting block, and an inner height limiting block; The base plate is fixedly connected to the outer heating ring and the inner heating ring; One end of the outer height limiting block is connected to the base plate, and the other end is connected to the inner height limiting block.

4. The assembly tooling for a capillary wick of a loop heat pipe according to claim 3, characterized in that, A first vent hole is provided at the center of the base plate; A second vent is provided at the center of the outer height limiting block; A third vent is provided at the center of the inner height limiting block; The first vent is connected to the second vent and the third vent.

5. The assembly tooling for a loop heat pipe capillary wick according to claim 4, characterized in that, The tapered screw includes a tapered head and a screw rod connected as one piece; The screw is machined with external threads for mounting the counterweight; The bottom of the expansion tube has a tail opening, which cooperates with the tapered large end to clamp the capillary core.

6. The assembly tooling for a capillary wick of a loop heat pipe according to claim 5, characterized in that, The counterweight includes an upper central hole and a lower central hole; The upper section center hole is machined with an internal thread that mates with the external thread.

7. A method for assembling a capillary wick for a loop heat pipe, using the assembly fixture for a capillary wick for a loop heat pipe as described in claim 6, characterized in that, The steps include the following: S1. Install the heating fixture; S2. Heating the outer heating ring; S3. Heat the heating fixture to T1. When the temperature of the heating fixture reaches T1, introduce low-pressure inert protective gas into the heating fixture through the first vent hole, and place the tube shell into the inner heating ring for heating until the tube shell is heated to temperature T1. S4. Place the guide fixture in the placement slot and automatically align the axis of the guide fixture with that of the heating fixture. S5. Insert the tapered screw into the central hole of the capillary core and clamp the capillary core. S6. Place the capillary core into the inlet section, and install the capillary core into the tube shell under the action of gravity; S7. Remove the guide fixture; S8. The assembled capillary core and the tube shell are removed from the heating fixture using the clamping fixture. S9. Remove the clamping fixture from the capillary core to complete the interference fit between the capillary core and the tube shell.

8. The assembly method for a capillary wick of a loop heat pipe according to claim 7, characterized in that, The heating method in step S2 is selected from one of the following: electric heating, furnace heating, induction heating, or salt bath heating.

9. The assembly method for a capillary wick of a loop heat pipe according to claim 7, characterized in that, In step S3, the temperature T1 is 280℃~480℃.

10. The assembly method for a capillary wick of a loop heat pipe according to claim 7, characterized in that, In step S3, the pressure of the low-pressure inert protective gas is 0.1 MPa to 1.2 MPa.

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