A kind of sling for disassembling and assembling TCL on GTF aeroengine fan case

Abstract

This utility model discloses a lifting tool for disassembling and assembling the TCL (Transmission Chain) on the fan casing of a GTF (Glass Engine) aircraft. The tool includes a lifting body, cantilever beams, and a lifting claw assembly. The lifting body includes a horizontal fixed plate with a rope hole in the center of its upper surface. At least three horizontal cantilever beams are evenly distributed around the perimeter of the fixed plate. The inner end of each cantilever beam is connected to the fixed plate, and its outer end is connected to the vertical lifting claw assembly. The lower end of the lifting claw assembly has a claw for hooking the bottom of the TCL. Using this utility model allows for convenient disassembly and assembly of the TCL, saving manpower, preventing personnel injury, and ensuring the TCL can be disassembled and replaced intact.

Description

Technical Field

[0001] This utility model relates to a lifting tool, and more particularly to a lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine. Background Technology

[0002] The GTF aero engine is a newly developed product by Pratt & Whitney. With its advanced design concept and high fuel efficiency, it has become the first choice for more and more airlines.

[0003] The fan housing 39 is a crucial component of the GTF engine, generating the majority of the engine's power. The TCL (Total Cooling Plate) is located at the front inner side of the fan housing; it is a combination of the front muffler and wear plate (TCL does not have a specific Chinese name). Figure 13 As shown.

[0004] Unlike traditional engines, the GTF aero engine incorporates many new design concepts, one of which is the TCL (Transformer Cylinder). It is a single-piece structure, exceeding 2 meters in diameter, 0.5 meters in height, and weighing over 50 kilograms. Currently, other stations, including Pratt & Whitney itself, rely on four or more operators to manually disassemble and install the TCL. The following problems exist during the TCL disassembly and assembly process:

[0005] (1) TCL has a straight wall structure, which makes it difficult for people to hold the TCL effectively, making it very inconvenient for personnel to disassemble and assemble.

[0006] (2) GTF is a new type of engine, which is very expensive, and manual operation can easily damage TCL.

[0007] (3) TCL is large and heavy, requiring multiple people to work together, and it is easy to cause injury to the operator during the process. Utility Model Content

[0008] The purpose of this utility model is to provide a lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine that is simple in structure, low in cost, easy to operate, saves manpower, and avoids damage to the TCL and operators.

[0009] The purpose of this utility model is achieved through the following technical measures: A lifting device for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine, characterized in that it includes a lifting device body, cantilever beams and lifting claw assembly. The lifting device body includes a horizontal fixed plate, a rope hole is provided in the middle of the upper surface of the fixed plate, and at least three horizontal cantilever beams are evenly distributed around the periphery of the fixed plate. The inner end of each cantilever beam is connected to the fixed plate, and the outer end is connected to the vertical lifting claw assembly. The lower end of the lifting claw assembly has a lifting claw for hooking the bottom of the TCL.

[0010] Using this invention, TCL can be easily disassembled and reassembled, saving manpower, avoiding personal injury, and ensuring that the TCL can be disassembled and replaced intact.

[0011] The fixing plate of the lifting device body of this utility model is a triangular plate with its sharp corners cut off. A pair of vertical mounting plates are provided at each corner of the fixing plate. Three pairs of mounting holes are opened on each pair of mounting plates, namely a first mounting hole, a second mounting hole, and a third mounting hole. A hinge shaft is installed in the first mounting hole, and the inner end of the cantilever beam is hinged to the hinge shaft. The second mounting hole is used for the cantilever beam to be placed horizontally when the lifting device is working so that a quick-release pin can be inserted to fix the cantilever beam. The third mounting hole is used for the cantilever beam to be erected when the lifting device is not working so that a quick-release pin can be inserted to fix the cantilever beam.

[0012] The present invention has a vertical connecting plate in the middle of the upper plate of the fixed plate, the rope hole is located on the connecting plate, and reinforcing plates are provided on both sides of the connecting plate.

[0013] The outer end of the cantilever beam of this utility model is a U-shaped plate. A pair of fourth mounting holes and a pair of fifth mounting holes are provided on the two side walls of the U-shaped plate. A hinge shaft is installed in the fourth mounting hole. The upper end of the lifting claw assembly is hinged to the hinge shaft. The fifth mounting hole is used to place the lifting claw assembly vertically when the lifting device is working so that a quick-release pin can be inserted to fix the lifting claw assembly.

[0014] The lifting claw assembly of this utility model includes a vertical lifting claw main arm, a guard plate assembly that can be raised and lowered along the lifting claw main arm, and a lifting claw that can move horizontally and is installed on the lower end of the lifting claw main arm. The guard plate assembly includes a guard plate that is a bent plate. The inner side of the vertical plate surface of the guard plate is a first arc-shaped surface that conforms to the outer wall surface of the TCL. The outer side surface of the lifting claw is a second arc-shaped surface that conforms to the inner wall of the TCL. The bottom of the outer side surface has a hook for hooking the bottom end of the TCL.

[0015] The horizontal surface of the protective plate of this utility model is fixed on a lifting plate. The lifting plate consists of a top surface and side surfaces located around the perimeter of the top surface. The top surface is a stepped surface. A sliding hole for fitting onto the main arm of the lifting claw is provided on the upper stepped surface. The horizontal surface of the protective plate is fixed on the lower stepped surface. A first threaded hole is provided on the side surface of the lifting plate, and a second threaded hole is provided on the main arm of the lifting claw. Bolts are inserted into the first threaded hole and the second threaded hole so that the protective plate can be tightened and positioned after adjustment.

[0016] The lifting claw of this utility model is a box-shaped component with one open side. A pair of guide holes extending horizontally are provided on the opposite side walls of the lifting claw. A guide post and a sixth mounting hole are provided on the main arm of the lifting claw. The two ends of the guide post extend into the guide holes of the lifting claw and can slide along the guide holes. A quick-release pin can be inserted into the sixth mounting hole to fix the lifting claw. A third threaded hole is provided on the main arm of the lifting claw. A fourth threaded hole is provided on the upper part of the outer side wall of the lifting claw. The position of the lifting claw in the horizontal direction can be adjusted by screwing a bolt into the third threaded hole and the fourth threaded hole.

[0017] The lifting claw assembly of this utility model includes a limiting and tightening block, which is composed of a screw and a top block. A fifth threaded hole is provided on the main arm of the lifting claw. The screw passes through the fifth threaded hole to adjust the position of the top block in the horizontal direction. The outer side of the top block is a third arc-shaped surface that adapts to the inner wall of the TCL.

[0018] Compared with the prior art, the present invention has the following significant advantages:

[0019] (1) Using this utility model, TCL can be easily disassembled and assembled, saving manpower, avoiding personal injury, and ensuring that the disassembly and replacement of TCL can be completed intact.

[0020] (2) The protective plate, top block and lifting claw of this utility model have arc-shaped surfaces that are adapted to the inner and outer walls of TCL, and can make better contact with the inner wall of TCL.

[0021] (3) This utility model has a simple structure, low cost, and strong applicability, and is suitable for widespread promotion and use. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a top view of the main body of the lifting device of this utility model;

[0025] Figure 3 This is a side view of the cantilever beam of this utility model;

[0026] Figure 4 This is a side view of the lifting claw assembly of this utility model;

[0027] Figure 5 It is along Figure 4 Sectional view of line AA in the middle;

[0028] Figure 6 This is a side view of the main boom of the lifting claw of this utility model;

[0029] Figure 7 This is a front view of the main boom of the lifting claw of this utility model;

[0030] Figure 8 This is a top view of the lifting plate of this utility model;

[0031] Figure 9 This is a three-dimensional structural diagram of the protective plate of this utility model;

[0032] Figure 10 This is a side view of the limiting and tightening block of this utility model;

[0033] Figure 11 This is a top view of the lifting claw of this utility model;

[0034] Figure 12 It is along Figure 11 Sectional view of the middle BB line;

[0035] Figure 13 This is a structural diagram of the fan housing and TCL.

[0036] In the diagram: 1-Lifting device body, 2-Cantilever beam, 3-Lifting claw assembly, 4-Fixing plate, 5-Connecting plate, 6-Lifting rope hole, 7-Reinforcing plate, 8-Mounting plate, 9-First mounting hole, 10-Second mounting hole, 11-Third mounting hole, 12-Lifting claw main boom, 13-Guard plate assembly, 14-Lifting claw, 15-Guard plate, 16-Hook, 17-Second arc surface, 18-Limiting and tightening block, 19-First arc surface, 20-Screw, 21-Top 22-Lifting plate, 23-Sliding hole, 24-Upper step surface, 25-Lower step surface, 26-First threaded hole, 27-Second threaded hole, 28-Guide hole, 29-Guide post, 30-Third threaded hole, 31-Fourth threaded hole, 32-Fifth threaded hole, 33-Third arc surface, 34-Fourth mounting hole, 35-Fifth mounting hole, 36-U-shaped plate, 37-Sixth mounting hole, 38-Seventh mounting hole, 39-Fan casing. Detailed Implementation

[0037] like Figures 1-12 As shown, this utility model discloses a lifting device for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine. The device includes a lifting body 1, cantilever beams 2, and lifting claw assembly 3. The lifting body 1 includes a horizontal fixed plate 4. A rope hole 6 is provided in the middle of the upper surface of the fixed plate 4. Three horizontal cantilever beams 2 are evenly distributed around the perimeter of the fixed plate 4. This method can enable the lifting device to bear force well and effectively control the center of gravity of the lifting device. The inner end of each cantilever beam 2 is connected to the fixed plate 4, and the outer end is connected to the vertical lifting claw assembly 3. The lower end of the lifting claw assembly 3 has a lifting claw 14 for hooking the bottom of the TCL.

[0038] The fixing plate 4 of the main body 1 of the lifting device is a triangular plate with its sharp corners cut off. A vertical connecting plate 5 is provided in the middle of the upper surface of the fixing plate 4. The lifting rope hole 6 is located on the connecting plate 5 and is used to thread the lifting rope. The lifting device is then connected to the overhead crane in the workshop through the lifting rope. Reinforcing plates 7 are provided on both sides of the connecting plate 5. A pair of vertical mounting plates 8 are provided at each corner of the fixing plate 4. Each pair of mounting plates 8 has three pairs of mounting holes, namely the first mounting hole 9, the second mounting hole 10, and the third mounting hole 11. The first mounting hole 9 is fitted with a hinge shaft, and the inner end of the cantilever beam 2 is hinged to the hinge shaft. The second mounting hole 10 is used for the cantilever beam 2 to be placed horizontally when the lifting device is working, allowing the quick-release pin to be inserted to fix the cantilever beam 2. The third mounting hole 11 is used to allow the cantilever beam 2 to be erected when the lifting device is not in operation, so that the quick-release pin can be inserted to fix the cantilever beam 2. When the lifting device is not in operation, because the lifting device occupies a large space, in order to save storage space, the quick-release pin inserted when the cantilever beam 2 is horizontal is removed, the cantilever beam is erected, and then the quick-release pin is inserted into the third mounting hole 11 to fix the cantilever beam.

[0039] The outer end of the cantilever beam 2 is a U-shaped plate 36. A pair of fourth mounting holes 34 and a pair of fifth mounting holes 35 are provided on the two side walls of the U-shaped plate 36. A hinge shaft is installed in the fourth mounting hole 34. The upper end of the lifting claw assembly 3 is hinged to the hinge shaft. The fifth mounting hole 35 is used to vertically place the lifting claw assembly 3 when the lifting device is working so that the quick-release pin can be inserted to fix the lifting claw assembly 3.

[0040] The lifting claw assembly 3 consists of three claws located on a theoretical circumference, facilitating simultaneous hooking of the TCL's bottom end by all three claws for TCL disassembly and installation. Each claw assembly 3 includes a vertical claw main arm 12, a guard plate assembly 13 that can move up and down along the claw main arm 12, a claw 14 mounted on the lower end of the claw main arm 12 that can move horizontally, and a limiting and tightening block 18. The guard plate assembly 13 includes a bent guard plate 15, the inner side of which is a first arc-shaped surface 19 that conforms to the outer wall of the TCL, securing the outer side of the TCL and preventing it from tipping over or swaying during lifting. The outer side of the claw 14 is a second arc-shaped surface 17 that conforms to the inner wall of the TCL, and the bottom of this outer side has a hook 16 for hooking the bottom end of the TCL to prevent it from tipping over during lifting. Because the inner wall of the TCL is circular, the front end of the lifting claw is a contoured arc surface. When the lifting claw hooks onto the bottom of the TCL, the arc surface of the front end of the lifting claw allows the lifting claw to make better contact with the circular inner wall of the TCL.

[0041] The horizontal surface of the guard plate 15 is fixed on a lifting plate 22. The lifting plate 22 consists of a top surface and sides located around the perimeter of the top surface. The top surface is a stepped surface. A sliding hole 23 for fitting onto the main arm 12 of the lifting claw is provided on the upper stepped surface 24. The horizontal surface of the guard plate 15 is fixed on the lower stepped surface 25. A first threaded hole 26 is provided on the side of the lifting plate 22, and a second threaded hole 27 is provided on the main arm 12 of the lifting claw. Bolts are inserted into the first threaded hole 26 and the second threaded hole 27 to tighten and position the guard plate 15 after it is adjusted to the correct position.

[0042] The lifting claw 14 is a box-shaped component with one open side. A pair of guide holes 28 extending horizontally are provided on the opposite side walls of the lifting claw 14. A guide post 29 (passing through the seventh mounting hole 38) and a sixth mounting hole 37 are provided on the main arm 12 of the lifting claw. The two ends of the guide post 29 extend into the guide holes 28 of the lifting claw 14 and can slide along the guide holes 28. Quick-release pins can be inserted into the sixth mounting hole 37 and the guide holes 28 to fix the lifting claw 14. A third threaded hole 30 is provided on the main arm 12 of the lifting claw, and a fourth threaded hole 31 is provided on the upper part of the outer side wall of the lifting claw 14. The position of the lifting claw 14 in the horizontal direction can be adjusted by screwing the bolts into the third threaded hole 30 and the fourth threaded hole 31. The lifting claw can be retracted when the lifting device is retracted, and the lifting claw can be extended when the lifting device is working.

[0043] The limiting and tightening block 18 ensures that the TCL will not sway due to center of gravity shift during the lifting process. The limiting and tightening block 18 consists of a screw 20 and a top block 21. A fifth threaded hole 32 is provided on the main arm 12 of the lifting claw. The screw 20 passes through the fifth threaded hole 32 to adjust the position of the top block 21 in the horizontal direction. By rotating the screw 20, the top block 21 can be retracted and extended. The outer side of the top block 21 is a third arc-shaped surface 33 that adapts to the inner wall of the TCL. Because the inner wall of the TCL is a combination structure of sound-absorbing plate and wear-resistant plate, its inner wall is a curved wall rather than a straight wall. Therefore, the arc-shaped surface of the top block 21 can ensure better contact between the top block and the inner wall of the TCL.

[0044] The usage process of this utility model is as follows: First, connect the main body of the lifting device to the overhead crane in the workshop via a lifting rope. Then, remove the quick-release pins on the main body of the lifting device to bring the cantilever beam from its retracted state to a horizontal position, and then insert the quick-release pins to secure it. Rotate the limiting and tightening block and the screws on the lifting claws to retract them, making it easier to pass the lifting device through the inner wall of the TCL. Control the overhead crane to center the lifting device on the TCL, and then slowly lower the lifting device. First, fine-tune the position of the lifting device so that the lifting profile plate protects the outer wall of the TCL. Then, when the lifting device reaches the bottom of the TCL, first rotate the screws on the lifting claws to change the lifting claws from a retracted state to an extended state, so that the lifting claws hook onto the bottom of the TCL, and at the same time, the arc-shaped structure on the lifting claws contacts the circular inner wall of the TCL. Rotate the screws on the tightening block to press the tightening block against the inner wall of the TCL, and then the TCL can be lifted by the action of the overhead crane. After the TCL lifting process is completed, rotate the screws to retract the tightening block and the lifting claws, and lift the lifting device out from the inside of the TCL.

[0045] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine, characterized in that: The device includes a lifting body, cantilever beams, and a lifting claw assembly. The lifting body includes a horizontal fixed plate with a rope hole in the center of the upper surface of the fixed plate. At least three horizontal cantilever beams are evenly distributed around the perimeter of the fixed plate. The inner end of each cantilever beam is connected to the fixed plate, and the outer end is connected to a vertical lifting claw assembly. The lower end of the lifting claw assembly has a lifting claw for hooking the bottom of the TCL.

2. The lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine according to claim 1, characterized in that: The fixing plate of the main body of the lifting device is a triangular plate with its sharp corners cut off. A pair of vertical mounting plates are provided at each corner of the fixing plate. Three pairs of mounting holes are opened on each pair of mounting plates, namely a first mounting hole, a second mounting hole, and a third mounting hole. A hinge shaft is installed in the first mounting hole, and the inner end of the cantilever beam is hinged to the hinge shaft. The second mounting hole is used for the cantilever beam to be placed horizontally when the lifting device is working so that a quick-release pin can be inserted to fix the cantilever beam. The third mounting hole is used for the cantilever beam to be erected when the lifting device is not working so that a quick-release pin can be inserted to fix the cantilever beam.

3. The lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine according to claim 2, characterized in that: A vertical connecting plate is provided in the middle of the upper surface of the fixed plate, the rope hole is located on the connecting plate, and reinforcing plates are provided on both sides of the connecting plate.

4. The lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine according to claim 3, characterized in that: The outer end of the cantilever beam is a U-shaped plate. A pair of fourth mounting holes and a pair of fifth mounting holes are provided on the two side walls of the U-shaped plate. A hinge shaft is installed in the fourth mounting hole. The upper end of the lifting claw assembly is hinged to the hinge shaft. The fifth mounting hole is used to place the lifting claw assembly vertically when the lifting device is working so that a quick-release pin can be inserted to fix the lifting claw assembly.

5. The lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine according to claim 4, characterized in that: The lifting claw assembly includes a vertical lifting claw main arm, a guard plate assembly that can be raised and lowered along the lifting claw main arm, and a lifting claw that can move horizontally and is mounted on the lower end of the lifting claw main arm. The guard plate assembly includes a guard plate that is a bent plate. The inner side of the vertical plate surface of the guard plate is a first arc-shaped surface that conforms to the outer wall surface of the TCL. The outer side surface of the lifting claw is a second arc-shaped surface that conforms to the inner wall of the TCL, and the bottom of the outer side surface has a hook for hooking the bottom end of the TCL.

6. The lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine according to claim 5, characterized in that: The horizontal surface of the guard plate is fixed to a lifting plate. The lifting plate consists of a top surface and side surfaces located around the perimeter of the top surface. The top surface is a stepped surface. A sliding hole for fitting onto the main arm of the lifting claw is provided on the upper stepped surface. The horizontal surface of the guard plate is fixed to the lower stepped surface. A first threaded hole is provided on the side surface of the lifting plate, and a second threaded hole is provided on the main arm of the lifting claw. Bolts are inserted into the first and second threaded holes to tighten and position the guard plate after it is adjusted to the correct position.

7. The lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine according to claim 6, characterized in that: The lifting claw is a box-shaped component with one open side. A pair of guide holes extending horizontally are provided on the opposite side walls of the lifting claw. A guide post and a sixth mounting hole are provided on the main arm of the lifting claw. The two ends of the guide post extend into the guide holes of the lifting claw and can slide along the guide holes. Quick-release pins can be inserted into the sixth mounting hole and the guide hole to fix the lifting claw. A third threaded hole is provided on the main arm of the lifting claw. A fourth threaded hole is provided on the upper part of the outer side wall of the lifting claw. The horizontal position of the lifting claw can be adjusted by screwing bolts into the third threaded hole and the fourth threaded hole.

8. The lifting tool for disassembling and assembling the TCL on the fan casing of a GTF aircraft engine according to claim 7, characterized in that: The lifting claw assembly includes a limiting and tightening block, which consists of a screw and a top block. A fifth threaded hole is provided on the main arm of the lifting claw. The screw passes through the fifth threaded hole to adjust the position of the top block in the horizontal direction. The outer surface of the top block is a third arc-shaped surface that conforms to the inner wall of the TCL.

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