Temperature difference method disassembly and assembly device for front baffle

Abstract

The present invention discloses a temperature difference method disassembly and assembly device for a front baffle, which is used for disassembling and assembling the front baffle on a turbine disk, and includes a base, a cooling mechanism, and a heating disassembly and assembly mechanism. The base is used to support and fix the turbine disk. The cooling mechanism includes a refrigerator and a cooling shaft connected to the refrigerator. The cooling shaft is used to pass through the shaft hole of the turbine disk. The outer periphery of the cooling shaft is provided with a plurality of cooling holes facing different positions of the turbine disk. The heating disassembly and assembly mechanism includes a heater and a heating wrench. The heating wrench includes a hot air distributor and a handle connected to the hot air distributor. The hot air distributor is connected to the heater and is used to surround the outer periphery of the front baffle. The hot air distributor is provided with a plurality of heating holes along its circumference. The handle is used to drive the front baffle to move relative to the turbine disk. The temperature difference method disassembly and assembly device for the front baffle provided by the present invention can ensure safe disassembly and assembly, ensure smooth disassembly and assembly, improve assembly accuracy, avoid extrusion deformation and even wear between parts, thereby ensuring stable performance of the parts.

Description

Technical Field

[0001] The invention relates to the technical field of assembly of aircraft engines, in particular to a temperature difference method disassembly and assembly device for a front baffle. Background Art

[0002] At present, due to the extremely high machining precision requirements of aircraft engines, the resistance to disassembly and assembly of two parts with interference fit is relatively large, and the temperature difference method is usually used for assembly. For example, when assembling the turbine disk and front baffle of an aircraft engine, the front baffle needs to be placed in a heating box for heating, and then assembled into the turbine disk after the assembly part of the front baffle is heated and expanded. When disassembling, the turbine disk and the front baffle need to be placed in a cooling box as a whole for cooling with dry ice or liquid nitrogen, and the disassembly can be performed after the matching structure between the two is fully cooled.

[0003] However, the traditional disassembly and assembly method does not take into account that the parts will continue to exchange heat with the external environment during the process of handling, clamping and assembly. In particular, for turbine disks with larger mass and diameter, a large number of auxiliary tools are required during the process of handling, clamping and assembly, which results in a lot of time consumption. When the actual disassembly and assembly begins, the temperature of the parts has deviated from the preset value, resulting in the assembly gap being reduced or already excessive. At this time, forced disassembly and assembly of parts can easily cause the parts to be squeezed, deformed or even worn. In this regard, in actual applications, in order to ensure that the temperature of the parts meets the requirements of disassembly and assembly, the parts need to be preheated to a higher temperature or cooled to a lower temperature, which will bury the safety hazards of burns and frostbite in the disassembly and assembly operation. Summary of the invention

[0004] The invention provides a temperature difference method disassembling and assembling device for a front baffle plate, so as to solve the technical problem that the front baffle plate of an existing aircraft engine is difficult to be disassembled and assembled relative to a turbine disk.

[0005] A temperature difference method disassembly and assembly device for a front baffle, used for disassembly and assembly of the front baffle on a turbine disk, the temperature difference method disassembly and assembly device for the front baffle comprising a base, a cooling mechanism and a heating disassembly and assembly mechanism respectively arranged on the base;

[0006] The base is used to support and fix the turbine disk;

[0007] The cooling mechanism comprises a refrigerator and a cooling shaft, wherein the cooling shaft is mounted on the base and is used to pass through the shaft hole of the turbine disk, a cooling channel connected to the refrigerator is arranged inside the cooling shaft, and a plurality of cooling holes are arranged on the outer circumference of the cooling shaft, each of which faces different positions of the turbine disk and is connected to the cooling channel;

[0008] The heating and disassembly mechanism includes a heater and a heating wrench, the heating wrench includes a hot air distributor and a handle connected to the hot air distributor, the hot air distributor is connected to the heater and is used to be arranged around the outer periphery of the front baffle, the hot air distributor is provided with a plurality of heating holes along its circumference, and the handle is used to abut against the front baffle and drive the front baffle to move relative to the turbine disk.

[0009] Preferably, the cooling shaft comprises a first segment and a second segment, the first segment is used to be inserted into the shaft hole of the turbine disk, and the second segment is used to be inserted out of an end of the turbine disk facing the front baffle;

[0010] The cooling holes include a first cooling hole arranged on the first segment and a second cooling hole arranged on the second segment, the first cooling hole is arranged toward the inner wall of the axial hole of the turbine disk, and the second cooling hole is arranged toward the assembly structure on the turbine disk for cooperating with the front baffle.

[0011] More preferably, the first segment is provided with a plurality of rows of cooling hole groups spaced apart along its axial direction, the cooling hole groups include a plurality of first cooling holes arranged along the circumference of the first segment, and the first cooling holes in two adjacent rows of cooling hole groups are staggered along the axial direction of the first segment.

[0012] More preferably, the first cooling holes in the multiple rows of cooling hole groups are arranged in a spiral shape along the axial direction of the first segment.

[0013] Preferably, the heating and disassembly mechanism also includes an annular tube connected to the heater and a plurality of pipe nozzles arranged on the annular tube at intervals along the circumference of the annular tube, wherein the pipe nozzles are connected to the hot air distributor and are used to introduce the hot air in the annular tube into the hot air distributor.

[0014] Preferably, the heating and disassembly mechanism further comprises an air duct, a first end of the air duct is connected to a heat dissipation port of the refrigerator, and a second end of the air duct is connected to an air inlet of the heater.

[0015] Preferably, the heating wrench further comprises a removal claw sleeved on the handle and used to move along the handle, the removal claw being used to move in a direction approaching or away from the front baffle, and hooking and pulling the front baffle when moving to below the front baffle.

[0016] Furthermore, the heating wrench also includes a locking assembly connected to the extraction claw and used to lock and fix the extraction claw relative to the handle.

[0017] Furthermore, the temperature difference method disassembly and assembly device of the front baffle also includes an elastic support mechanism, a clamping position for supporting and fixing the turbine disk is provided on the base, a mounting hole is opened on the side of the base facing the clamping position, the elastic support mechanism includes a support spring arranged in the mounting hole and a support frame abutting the support spring and rotatably connected to the mounting hole, the support frame includes a horizontal support arm extending in a horizontal direction, the support frame is used to rotate to the bottom of the front baffle or detach from the front baffle relative to the mounting hole, and elastically support the front baffle through the support spring when rotating to the bottom of the front baffle.

[0018] Furthermore, the temperature difference disassembly and assembly device of the front baffle also includes a pressing sleeve, a guide rod is provided at the top end of the cooling shaft, and the pressing sleeve is sleeved on the guide rod. The pressing sleeve is used to abut against the top surface of the front baffle and move along the guide rod to press down the front baffle under the action of external force.

[0019] The present invention has the following beneficial effects:

[0020] In the temperature difference disassembly and assembly device for the front baffle provided by the present invention, the turbine disk is first supported and fixed by the base, and then the turbine disk is continuously cooled from the axial hole position of the turbine disk by the cooling shaft, and the front baffle is continuously heated by the heating wrench, so that the outer diameter of the turbine disk is cooled and shrunk while the inner diameter of the front baffle is heated and expanded. Compared with the method of heating or cooling only one of the parts, the assembly clearance of the front baffle relative to the turbine disk can be effectively increased without heating the parts to a higher temperature or cooling them to a lower temperature, thereby ensuring the safety of the disassembly and assembly operation and avoiding burns, frostbite and other problems of the operators. In addition, the cooling shaft and the heating wrench are independently arranged, and the cooling process and the heating process will not interfere with each other. Secondly, since the handle of the heating wrench is connected to the hot air distributor, the handle can drive the hot air distributor to move synchronously while driving the front baffle to move, so that the hot air distributor can continuously heat and insulate the assembly position of the front baffle, and the cooling shaft can also continuously cool the turbine disk, so that the front baffle and the turbine disk can maintain the preset temperature during the entire disassembly and assembly process, ensuring smooth disassembly and assembly, effectively improving assembly accuracy, avoiding extrusion deformation and even wear between parts, thereby ensuring stable performance of the parts.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 A top view of a temperature difference method disassembly and assembly device for a front baffle provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 The cross-sectional view of the temperature difference method disassembly and assembly device of the front baffle along the AA direction is shown.

[0025] Legend:

[0026] 1. Base; 11. Position; 12. Mounting hole; 2. Cooling mechanism; 21. Refrigerator; 22. Cooling shaft; 221. Cooling channel connection; 222. Cooling hole; 2221. First cooling hole; 2222. Second cooling hole; 23. Guide rod; 24. First blower; 3. Heating and disassembling mechanism; 31. Heater; 32. Heating wrench; 321. Hot air distributor; 322. Handle; 323. Pull-out claw; 324. Locking assembly; 33. Ring pipe; 34. Pipe nozzle; 35. Air duct; 36. Second blower; 4. Elastic support mechanism; 41. Support spring; 42. Support frame; 421. Horizontal support arm; 5. Press sleeve; 6. Positioning pin; 7. Positioning block. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0028] Figure 1 and Figure 2 The invention collectively shows a device for disassembling and assembling a front baffle using a temperature difference method, which is used in the assembly of aircraft engines, and specifically for disassembling and assembling a front baffle on a turbine disk. The device can maintain both the turbine disk and the front baffle at a preset temperature during the disassembly and assembly operation, thereby achieving assembly using a temperature difference method, ensuring smooth assembly, ensuring safety and improving assembly accuracy.

[0029] Please combine Figure 1 and Figure 2The temperature difference method disassembly and assembly device of the front baffle comprises a base 1, a cooling mechanism 2 and a heating disassembly and assembly mechanism 3, and the cooling mechanism 2 and the heating disassembly and assembly mechanism 3 are respectively arranged on the base 1. The base 1 is provided with a clamping position 11 for supporting and fixing the turbine disk 100. The cooling mechanism 2 comprises a refrigerator 21 and a cooling shaft 22, and the cooling shaft 22 is installed on the base 1 and is used to be inserted into the central axis hole of the turbine disk 100. The interior of the cooling shaft 22 is provided with a cooling channel 221 connected to the refrigerator 21, and the outer periphery of the cooling shaft 22 is provided with a plurality of cooling holes 222, and the plurality of cooling holes 222 are respectively arranged toward different positions of the turbine disk 100 and are all connected with the cooling channel 221. The heating and disassembly mechanism 3 includes a heater 31 and a heating wrench 32. The heating wrench 32 includes a hot air distributor 321 and a handle 322 connected to the hot air distributor 321. The hot air distributor 321 is connected to the heater 31 and is used to be arranged around the outer periphery of the front baffle 200. The hot air distributor 321 is provided with a plurality of heating holes along its circumference. The handle 322 is used to abut against the front baffle 200 and drive the front baffle 200 to move relative to the turbine disk 100.

[0030] Specifically, the refrigerator 21 is used to prepare cold air and transport the cold air to the cooling channel 221 of the cooling shaft 22, so that the cold air is sprayed toward different positions of the turbine disk 100 through the multiple cooling holes 222, so that the overall temperature of the turbine disk 100 is reduced. The heater 31 is used to prepare hot air and transport the hot air to the hot air distributor 321, so that the hot air is sprayed toward different positions of the front baffle 200 through the multiple hot air holes on the hot air distributor 321, so that the overall temperature of the front baffle 200 is increased. Therefore, in the temperature difference method disassembly and assembly device of the front baffle, the base 1 first supports and fixes the turbine disk 100, and then the cooling shaft 22 is used to continuously cool the turbine disk 100 from the axial hole position of the turbine disk 100, and the front baffle 200 is continuously heated by the heating wrench 32, so that the outer diameter of the turbine disk 100 is cooled and shrunk while the inner diameter of the front baffle 200 is heated and expanded. Compared with the method of heating or cooling only one of the parts, the assembly clearance of the front baffle 200 relative to the turbine disk 100 can be effectively increased without heating the parts to a higher temperature or cooling them to a lower temperature, thereby ensuring the safety of the disassembly and assembly operation and avoiding burns, frostbite and other problems of the operators. In addition, the cooling shaft 22 and the heating wrench 32 are independently arranged, and the cooling process and the heating process will not interfere with each other. Secondly, since the handle 322 of the heating wrench 32 is connected to the hot air distributor 321, the handle 322 can drive the hot air distributor 321 to move synchronously during the process of driving the front baffle 200 to move, so that the hot air distributor 321 remains relatively still relative to the front baffle 200, thereby continuously heating and insulating the assembly position of the front baffle 200, and the cooling shaft 22 can also continuously cool the turbine disk 100, so that the front baffle 200 and the turbine disk 100 can maintain the preset temperature throughout the entire disassembly and assembly process, ensuring smooth disassembly and assembly, effectively improving assembly accuracy, avoiding extrusion deformation and even wear between the front baffle 200 and the turbine disk 100, and ensuring stable performance of parts.

[0031] like Figure 2 As shown, the cooling shaft 22 includes a first segment and a second segment coaxially arranged with the first segment, the first segment is used to be inserted into the axial hole of the turbine disk 100, and the second segment is used to pass out to the outside of one end of the turbine disk 100 facing the front baffle 200, and the cooling channel 221 extends along the first segment to the second segment.

[0032] Preferably, the cooling holes 222 include a plurality of first cooling holes 2221 and a plurality of second cooling holes 2222, the plurality of first cooling holes 2221 are arranged on the first segment and arranged around the periphery of the first segment, the plurality of second cooling holes 2222 are arranged on the second segment and arranged around the periphery of the second segment, the first cooling holes 2221 are arranged toward the inner wall of the axial hole of the turbine disk 100, and the second cooling holes 2222 are arranged toward the assembly structure on the turbine disk 100 for cooperating with the front baffle 200. The cooling shaft 22 first cools the turbine disk 100 from the inside of the turbine disk 100 through the first cooling holes 2221, so that the overall temperature of the turbine disk 100 can steadily decrease, and then cools the assembly structure of the turbine disk 100 through the second cooling holes 2222, so that the assembly structure of the turbine disk 100 can be maintained at a low temperature state that meets the assembly requirements, ensuring smooth assembly. By optimizing the arrangement of the cooling holes 222, the cooling effect of the turbine disk 100 is effectively improved.

[0033] More preferably, the first segment is provided with a plurality of rows of cooling hole groups spaced apart along its axial direction, a single row of cooling hole groups includes a plurality of first cooling holes 2221 arranged along the circumference of the first segment, and the first cooling holes 2221 in two adjacent rows of cooling hole groups are staggered along the axial direction of the first segment to avoid cold air being concentrated in the same direction in the turbine disk 100, thereby achieving uniform cooling.

[0034] More preferably, the first cooling holes 2221 in the multiple rows of cooling hole groups are arranged in a spiral shape along the axial direction of the first segment, that is, along the axial direction of the first segment, the first cooling holes 2221 in each row of the cooling hole groups are rotated by a certain angle along the circumferential direction of the first segment relative to the first cooling holes 2221 in the previous row of cooling hole groups. This structure enables the cooling gas blown out of the first cooling holes 2221 in the multiple rows of cooling hole groups to flow in a spiral shape after merging, so that the cooling gas can be evenly attached to the turbine disk 100, and can also increase the flow rate of the cooling gas, effectively improving the cooling effect.

[0035] exist Figure 1As shown in the figure, the heating and disassembling mechanism 3 further includes an annular tube 33 and a pipe nozzle 34. The annular tube 33 is used to be arranged around the front baffle 200 and connected to the heater 31. There are multiple pipe nozzles 34, and the multiple pipe nozzles 34 are arranged on the annular tube 33 at equal intervals along the circumference of the annular tube 33. The pipe nozzle 34 is connected to the hot gas distributor 321 and is used to introduce the hot gas in the annular tube 33 into the hot gas distributor 321. The high-temperature gas output by the heater 31 first enters the annular tube 33 to evenly fill the annular tube 33, and then is simultaneously introduced into the hot gas distributor 321 from different circumferential positions of the annular tube 33, so that the hot gas in the hot gas distributor 321 is evenly distributed, so that the multiple heating holes on the hot gas distributor 321 can simultaneously and stably spray high-temperature gas to ensure uniform heating.

[0036] Preferably, the heating and disassembling mechanism 3 further includes an air duct 35, a first end of which is connected to the heat dissipation port of the refrigerator 21, and a second end of which is connected to the air inlet of the heater 31. The air duct 35 is used to introduce the high-temperature gas discharged from the refrigerator 21 during heat dissipation into the heater 31, so that the refrigerator 21 and the heater 31 work in coordination, which is more conducive to the heating process of the heater 31, reduces the load of the heater 31, and ensures that the heating temperature can meet the design requirements.

[0037] Furthermore, the cooling mechanism 2 also includes a first blower 24 connected to the air inlet of the refrigerator 21, and the heating and disassembly mechanism 3 also includes a second blower 36 arranged on the air duct 35. The refrigerator 21 transports gas through the first blower 24, and the heating and disassembly mechanism 3 transports gas through the second blower 36 to ensure sufficient air intake.

[0038] like Figure 2 As shown, the heating wrench 32 further includes a removal claw 323, which is sleeved on the handle 322 and is used to move along the handle 322. The handle 322 is extended along the radial direction of the front baffle 200, so that the removal claw 323 can move in a direction close to or away from the front baffle 200. The removal claw 323 is used to move to the bottom of the front baffle 200 and hook the front baffle 200, so that when the handle 322 is lifted, the front baffle 200 can be pulled out upward by the removal claw 323 to achieve the removal operation of the front baffle 200. Secondly, since the removal claw 323 is movably arranged relative to the handle 322, it can move away from the front baffle 200 to avoid interference with the movement of the heating wrench 32.

[0039] Furthermore, the heating wrench 32 also includes a locking assembly 324 connected to the extraction claw 323 , and the locking assembly 324 is used to lock and fix the extraction claw 323 relative to the handle 322 .

[0040] Furthermore, at least some sections of the handle 322 are provided with external threads, and a limiting flange is provided on the handle 322. The locking assembly 324 includes a locking nut sleeved on the handle 322 and threadedly connected to the handle 322, the limiting flange is used to stop the first end of the extraction claw 323, and the locking nut is used to stop the second end of the extraction claw 323. By screwing the position of the locking nut, the extraction claw 323 can be clamped and fixed on the limiting flange, thereby realizing the positioning and fixing of the extraction claw 323.

[0041] Furthermore, the temperature difference method disassembly and assembly device of the front baffle also includes an elastic support mechanism 4, a mounting hole 12 is opened on the side of the base 1 facing the locking position 11, the elastic support mechanism 4 includes a support spring 41 and a support frame 42, the support spring 41 is arranged in the mounting hole 12, the support frame 42 abuts against one end of the support spring 41 close to the opening of the mounting hole 12 and is rotatably connected to the mounting hole 12, the support frame 42 includes a horizontal support arm 431 extending in the horizontal direction, the support frame 42 is used to rotate relative to the mounting hole 12 to the bottom of the front baffle 200 or detach from the front baffle 200, and elastically supports the front baffle 200 through the support spring 41 when rotating to the bottom of the front baffle 200. Before assembling the front baffle 200 , the elastic support mechanism 4 can temporarily support the front baffle 200 , and when the heating wrench 32 removes the downward pressure, the support spring 41 can drive the front baffle 200 to shift upward and reset, so as to facilitate the installation and positioning of the front baffle 200 .

[0042] Furthermore, the temperature difference disassembly and assembly device of the front baffle also includes a pressing sleeve 5, a guide rod 23 is provided at the top end of the cooling shaft 22, and the pressing sleeve 5 is sleeved on the guide rod 23. The pressing sleeve 5 is used to abut against the top surface of the front baffle 200 and move down along the guide rod 23 to press down the front baffle 200 under the action of external force.

[0043] The disassembly and assembly process of the temperature difference disassembly and assembly device of the front baffle is as follows: first, temporarily support the front baffle 200 by the elastic support mechanism 4, then press down the front baffle 200 by the heating wrench 32 to make the front baffle 200 fit on the turbine disk 100, then rotate the front baffle 200 so that the assembly structures of the front baffle 200 and the turbine disk 100 are arranged opposite each other, then slowly withdraw the axial force of the heating wrench 32 to make the front baffle 200 rise under the elastic force of the elastic support mechanism 4, finally use a driving device such as an oil pump to press down the pressing sleeve 5, and press the front baffle 200 into place by the pressing sleeve 5 to complete the assembly operation. The positioning and assembly processes are convenient and quick.

[0044] Furthermore, the temperature difference method disassembly and assembly device of the front baffle further includes a positioning pin 6 and a positioning block 7, wherein the positioning pin 6 is used to be inserted into the pin holes preset in the front baffle 200 and the turbine disk 100 in sequence to realize the positioning connection of the front baffle 200 relative to the turbine disk 100. The positioning block 7 is used to be cushioned between the front baffle 200 and the turbine disk 100 so that the front baffle 200 and the turbine disk 100 maintain a fixed gap during assembly, thereby facilitating the installation and positioning of the front baffle 200.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A front baffle assembly and disassembly device using a temperature difference method, used for assembling and disassembling a front baffle (200) on a turbine disk (100), characterized in that: It comprises a base (1), a cooling mechanism (2) and a heating and disassembly mechanism (3) respectively arranged on the base (1); The base (1) is used to support and fix the turbine disk (100); The cooling mechanism (2) comprises a refrigerator (21) and a cooling shaft (22); the cooling shaft (22) is mounted on the base (1) and is used to be inserted into the shaft hole of the turbine disk (100); a cooling channel (221) connected to the refrigerator (21) is provided inside the cooling shaft (22); and a plurality of cooling holes (222) are arranged on the periphery of the cooling shaft (22), each of which faces different positions of the turbine disk (100) and is connected to the cooling channel (221); The heating disassembly and assembly mechanism (3) comprises a heater (31) and a heating wrench (32); the heating wrench (32) comprises a hot air distributor (321) and a handle (322) connected to the hot air distributor (321); the hot air distributor (321) is connected to the heater (31) and is used to be arranged around the outer circumference of the front baffle (200); the hot air distributor (321) is provided with a plurality of heating holes along its circumference; and the handle (322) is used to abut against the front baffle (200) and drive the front baffle (200) to move relative to the turbine disk (100); The cooling shaft (22) comprises a first segment and a second segment, the first segment being used to be inserted into the shaft hole of the turbine disk (100), and the second segment being used to be inserted out to the outside of one end of the turbine disk (100) facing the front baffle (200); The cooling holes (222) include a first cooling hole (2221) arranged on the first segment and a second cooling hole (2222) arranged on the second segment, wherein the first cooling hole (2221) is arranged toward the inner wall of the shaft hole of the turbine disk (100), and the second cooling hole (2222) is arranged toward an assembly structure on the turbine disk (100) for cooperating with the front baffle (200).

2. The temperature difference method disassembly and assembly device of the front baffle according to claim 1, characterized in that: The first segment is provided with a plurality of rows of cooling hole groups spaced apart along its axial direction, the cooling hole group comprising a plurality of first cooling holes (2221) arranged along the circumference of the first segment, and the first cooling holes (2221) in two adjacent rows of cooling hole groups are staggered along the axial direction of the first segment.

3. The temperature difference method disassembly and assembly device of the front baffle according to claim 2, characterized in that: The first cooling holes (2221) in the multiple rows of cooling hole groups are arranged in a spiral shape along the axial direction of the first segment.

4. The temperature difference method disassembly and assembly device of the front baffle according to claim 1, characterized in that: The heating and disassembling mechanism (3) further comprises an annular tube (33) connected to the heater (31) and a plurality of pipe nozzles (34) arranged on the annular tube (33) at intervals along the circumference of the annular tube (33); the pipe nozzles (34) are connected to the hot air distributor (321) and are used to guide the hot air in the annular tube (33) into the hot air distributor (321).

5. The temperature difference method disassembly and assembly device of the front baffle according to claim 1, characterized in that: The heating and disassembling mechanism (3) further comprises an air duct (35), a first end of the air duct (35) being connected to a heat dissipation port of the refrigerator (21), and a second end of the air duct (35) being connected to an air inlet of the heater (31).

6. The temperature difference method disassembly and assembly device of the front baffle according to claim 1, characterized in that: The heating wrench (32) further comprises a removal claw (323) sleeved on the handle (322) and used to move along the handle (322); the removal claw (323) is used to move in a direction approaching or away from the front baffle (200), and to hook and pull the front baffle (200) when moving to the bottom of the front baffle (200).

7. The temperature difference method disassembly and assembly device of the front baffle according to claim 6, characterized in that: The heating wrench (32) further comprises a locking assembly (324) connected to the extraction claw (323) and used for locking and fixing the extraction claw (323) relative to the handle (322).

8. The temperature difference method disassembly and assembly device of the front baffle according to claim 1, characterized in that: The temperature difference method disassembly and assembly device of the front baffle further comprises an elastic support mechanism (4); a clamping position (11) for supporting and fixing the turbine disk (100) is provided on the base (1); a mounting hole (12) is provided on the base (1) on a side facing the clamping position (11); the elastic support mechanism (4) comprises a support spring (41) arranged in the mounting hole (12) and a support frame (42) abutting against the support spring (41) and rotatably connected to the mounting hole (12); the support frame (42) comprises a horizontal support arm (421) extending in a horizontal direction; the support frame (42) is used to rotate relative to the mounting hole (12) to the bottom of the front baffle (200) or to detach from the front baffle (200); and when rotating to the bottom of the front baffle (200), the support frame (42) elastically supports the front baffle (200) through the support spring (41).

9. The temperature difference method disassembly and assembly device of the front baffle according to claim 1, characterized in that: The temperature difference method disassembly and assembly device of the front baffle also includes a pressing sleeve (5), a guide rod (23) is provided at the top end of the cooling shaft (22), and the pressing sleeve (5) is sleeved on the guide rod (23). The pressing sleeve (5) is used to abut against the top surface of the front baffle (200) and move along the guide rod (23) to press down the front baffle (200) under the action of external force.

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