A special disassembly tool for heat shield of gas turbine combustion chamber
By designing a special disassembly tool including a horizontal handle, a Z-shaped vertical arm, a fulcrum ring and a hook, the problem of difficult disassembly of the gas turbine combustion chamber thermal insulation screen without a top wire hole or hanging point is solved, and efficient disassembly of the thermal insulation screen is achieved.
Patent Information
- Application Number
- CN202411961371.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2044-12-30
AI Technical Summary
The prior art is difficult to remove the gas turbine combustion chamber insulation screens without top wire holes or hanging points, especially those with only one circle of radial through holes on the outer edge.
A special disassembly tool is designed, including a horizontal handle, a Z-shaped vertical arm, a fulcrum ring and a hook. The through hole is inserted through the hook head, the fulcrum ring and the outer flange rotate, and the hook is lifted to achieve the disassembly and lifting of the heat insulation screen.
It effectively improves the disassembly efficiency of the heat insulation screen without the top wire hole or hanging point, reduces the disassembly difficulty, and meets the disassembly needs of the gas turbine combustion chamber heat insulation screen.
Smart Images
Figure CN119407730B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of gas turbines, and in particular relates to a special disassembly tool for a heat shield of a combustion chamber of a gas turbine. Background Art
[0002] At the outlet of the gas turbine combustion chamber, in order to reduce the radiation of heat to the rear turbine casing, a heat shield is often installed at the outlet of the gas turbine combustion chamber. Due to the large size and weight of the heat shield, and the small gap between the heat shield and the combustion chamber casing, it is often necessary to set a screw hole or a hanging point on the heat shield in the prior art to facilitate the removal of the heat shield. However, due to process requirements, some heat shields do not have screw holes or hanging points on the heat shield. For heat shields that do not have screw holes or hanging points and only have a circle of radial through holes on the outer edge, how to disassemble the heat shield has become an urgent problem to be solved. Summary of the invention
[0003] In order to solve the above problems existing in the prior art, the present invention provides a special disassembly tool for the heat shield of the combustion chamber of a gas turbine.
[0004] The technical solution adopted by the present invention is:
[0005] A special disassembly tool for a heat shield of a combustion chamber of a gas turbine, comprising a horizontal handle, a right vertical arm, a left vertical arm, a fulcrum ring and a hook;
[0006] A combustion chamber casing is arranged outside the combustion chamber of the gas turbine; a combustion chamber outlet and an outer flange are arranged on the combustion chamber casing, the combustion chamber outlet is in a tubular shape, and the outer flange is arranged radially outside the combustion chamber outlet; an annular groove is formed between the combustion chamber outlet and the outer flange, and a heat shield is installed in the annular groove;
[0007] The right vertical arm and the left vertical arm are both Z-shaped; the left end of the horizontal handle is fixedly connected to the upper end of the left vertical arm, and the right end of the horizontal handle is fixedly connected to the upper end of the right vertical arm; the left end of the fulcrum ring is fixedly connected to the lower end of the left vertical arm, and the right end of the fulcrum ring is fixedly connected to the lower end of the right vertical arm; an arc groove is provided on the side wall of the lower part of the fulcrum ring, and the arc groove is arranged along the circumferential direction of the fulcrum ring; the upper end of the hook is rotatably connected to the groove wall at one end of the arc groove, and the lower end of the hook is provided with a hook head.
[0008] As an alternative or supplement to the above-mentioned special disassembly tool: when the disassembly tool removes the heat shield from the combustion chamber casing, the hook head is connected to the heat shield, the outer wall of the fulcrum ring abuts against the inner edge of the outer flange and rotates circumferentially, so that the hook is continuously lifted and moved into the arc groove.
[0009] As an alternative or supplement to the above-mentioned special disassembly tool: when the disassembly tool detaches the heat shield from the combustion chamber casing, the right vertical arm and the left vertical arm can abut against the outer edge of the outer flange and tilt up the fulcrum ring.
[0010] As an alternative or supplement to the above-mentioned special disassembly tool: the width of the upper portion of the hook is smaller than the width of the arc-shaped groove, so that the arc-shaped groove can accommodate the hook.
[0011] As an alternative or supplement to the above-mentioned special disassembly tool: the arc groove is semicircular.
[0012] As an alternative or supplement to the above-mentioned special disassembly tool: the upper end of the hook is connected with a rotating pin, and is rotatably connected to the fulcrum ring through the rotating pin.
[0013] As an alternative or supplement to the above-mentioned special disassembly tool: a flange is arranged on the outer side of the heat insulation screen, and a radial through hole is arranged on the flange; when the hook head is connected to the heat insulation screen, the hook head is inserted into the through hole.
[0014] As an alternative or supplement to the above-mentioned special disassembly tool: the heat insulation screen is in the shape of a cone disk. When the heat insulation screen is in the installed state, the inner edge of the heat insulation screen is connected with the inner flange at the outlet of the combustion chamber, and the inner edge of the heat insulation screen is tightly matched with the groove wall of the annular groove.
[0015] As an alternative or supplement to the above-mentioned special disassembly tool: after the disassembly tool lifts up the heat insulation shield, the distance D between the inner edge of the heat insulation shield and the outlet of the combustion chamber is 32 mm ± 2 mm.
[0016] The beneficial effects of the present invention are as follows: the special disassembly tool of the present scheme can be used to disassemble a heat shield that is not provided with top screw holes or hanging points and only has radial through holes on the edge, thereby improving the disassembly efficiency of the heat shield, reducing the disassembly difficulty, and meeting the disassembly needs of the heat shield of the combustion chamber of a gas turbine. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.
[0018] Figure 1 It is a side view of the special disassembly tool in this solution;
[0019] Figure 2 This is another side view of the special disassembly tool in this solution;
[0020] Figure 3 This is a usage status diagram of the special disassembly tool in this solution;
[0021] Figure 4 This is another usage state diagram of the special disassembly tool in this solution;
[0022] Figure 5 This is another usage status diagram of the special disassembly tool in this solution.
[0023] In the figure: 1- horizontal handle; 2- right vertical arm; 3- left vertical arm; 4- fulcrum ring; 5- hook; 51- hook head; 6- rotating pin; 7- combustion chamber casing; 71- combustion chamber outlet; 72- outer flange; 73- ring groove; 8- heat shield. DETAILED DESCRIPTION
[0024] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.
[0025] Example 1
[0026] like Figures 1 to 5 As shown, a combustion chamber casing 7 is arranged outside the combustion chamber of the gas turbine; the combustion chamber casing 7 is provided with a combustion chamber outlet 71 and an outer flange 72, wherein the combustion chamber outlet 71 is mainly used for discharging the combustion chamber exhaust gas, and the outer flange 72 is used for connecting the turbine casing. The combustion chamber outlet 71 is tubular and has a certain length, and the outer flange 72 is arranged radially outside the combustion chamber outlet 71; an annular groove 73 is formed between the combustion chamber outlet 71 and the outer flange 72, and the heat shield 8 is installed in the annular groove 73 to reduce the heat transfer between the combustion chamber and the turbine casing.
[0027] The heat shield 8 is in the shape of a cone disk, and a flange is provided on the outer side of the heat shield 8, and radial through holes are provided on the flange; when installing, screws are passed through these through holes and then threadedly connected to the groove wall of the annular groove 73 at the root of the outer flange 72. When the heat shield 8 is in the installed state, the inner edge of the heat shield 8 is connected with the inner flange at the combustion chamber outlet 71, and the gap between the two is about 6mm, and the inner edge of the heat shield 8 is tightly matched with the groove wall of the annular groove 73. However, the heat shield 8 of the above installation structure is difficult to disassemble by ejection or other methods due to the position and orientation of the through holes. At the same time, the gap between the inner edge of the heat shield 8 and the combustion chamber outlet 71 is too small, and the weight of the heat shield 8 is relatively large (usually more than 50kg), so it is difficult to achieve quick disassembly.
[0028] This embodiment is aimed at this heat shield 8. This embodiment designs a special disassembly tool for the gas turbine combustion chamber heat shield 8, including components such as a horizontal handle 1, a right vertical arm 2, a left vertical arm 3, a fulcrum ring 4 and a hook 5.
[0029] The horizontal handle 1 is a short rod arranged horizontally and is mainly used for holding by human hands.
[0030] The right vertical arm 2 and the left vertical arm 3 are both in a Z shape and can be formed by bending a metal flat bar. The right vertical arm 2 and the left vertical arm 3 are arranged in a mirror image manner. The left end of the horizontal handle 1 is fixedly connected to the upper end of the left vertical arm 3, and the right end of the horizontal handle 1 is fixedly connected to the upper end of the right vertical arm 2. The fulcrum ring 4 is in a circular ring shape, and the axial direction of the fulcrum ring 4 is parallel to the axial direction of the horizontal handle 1. The length of the fulcrum ring 4 is less than the length of the horizontal handle 1. The left end of the fulcrum ring 4 is fixedly connected to the lower end of the left vertical arm 3, and the right end of the fulcrum ring 4 is fixedly connected to the lower end of the right vertical arm 2, so that the horizontal handle 1, the right vertical arm 2, the left vertical arm 3, and the fulcrum ring 4 are connected to form a T-shaped structure.
[0031] An arc groove is arranged on the side wall of the lower part of the fulcrum ring 4, and the arc groove is semicircular and arranged along the circumferential direction of the fulcrum ring 4; the upper end of the hook 5 is rotatably connected to the fulcrum ring 4, specifically: the upper end of the hook 5 extends into the interior of one end of the arc groove, and the upper end of the hook 5 is connected to a rotating pin 6, and the hook 5 is rotatably connected to the fulcrum ring 4 through the rotating pin 6, and is rotatably connected to the groove wall of the arc groove through the pin shaft, and the lower end of the hook 5 is provided with a hook head 51, the hook head 51 is perpendicular to the hook handle of the hook 5, and the direction of the hook head is perpendicular to the circumference of the fulcrum ring 4, and the hook head 51 is used to be hung on the through hole of the heat insulation screen 8.
[0032] The width of the upper portion of the hook 5 is smaller than the width of the arc groove, so that the arc groove can accommodate the hook 5. Thus, the hook 5 can be rotated into the arc groove and achieve the following Figure 5 in the position shown.
[0033] When the special disassembly tool is used to disassemble the heat shield 8 from the combustion chamber casing 7:
[0034] The hook head 51 is inserted into the through hole to connect the hook head 51 with the heat shield 8, and the outer wall of the fulcrum ring 4 abuts against the inner edge of the outer flange 72. When the horizontal handle 1 is manually pulled, the fulcrum ring 4 rotates circumferentially, and the contact point between the fulcrum ring 4 and the inner edge of the outer flange 72 also changes along the circumference of the fulcrum ring 4. At the same time, due to the change in the position of the pin, the hook 5 is continuously lifted and the hook 5 is continuously moved into the arc groove. When the height of the hook 5 is raised, the heat shield 8 will be continuously pulled out of the annular groove 73 of the combustion chamber casing 7.
[0035] When the right vertical arm 2 and the left vertical arm 3 swing to a certain angle, due to the protrusion on the outer side of the outer flange 72, the right vertical arm 2 and the left vertical arm 3 will be able to abut against the outer edge of the outer flange 72, so that the heat insulation shield 8 is further detached from the combustion chamber casing 7 with the contact point between the right vertical arm 2 and the left vertical arm 3 and the outer flange 72 as the fulcrum. At this time, the fulcrum ring 4 is in a tilted state and is out of contact with the outer flange 72.
[0036] After the special disassembly tool lifts the heat shield 8, the distance D between the inner edge of the heat shield 8 and the combustion chamber outlet 71 is 32 mm ± 2 mm. At this time, the tool or the sling can be inserted between the inner edge of the heat shield 8 and the combustion chamber outlet 71 to remove the heat shield 8.
[0037] During the actual disassembly process, two technical workers can cooperate to install special disassembly tools on the opposite sides of the heat insulation screen 8, and disassemble both ends of the heat insulation screen 8 at the same time. More special disassembly tools can also be used for cooperation, and the usage of each disassembly tool remains unchanged.
[0038] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.
Claims
1. A special disassembly tool for a gas turbine combustion chamber heat shield, characterized in that: It comprises a horizontal handle (1), a right vertical arm (2), a left vertical arm (3), a fulcrum ring (4) and a hook (5); A combustion chamber casing (7) is arranged outside the combustion chamber of the gas turbine; a combustion chamber outlet (71) and an outer flange (72) are arranged on the combustion chamber casing (7); the combustion chamber outlet (71) is tubular, and the outer flange (72) is arranged radially outside the combustion chamber outlet (71); an annular groove (73) is formed between the combustion chamber outlet (71) and the outer flange (72), and the heat shield (8) is installed in the annular groove (73); The right vertical arm (2) and the left vertical arm (3) are both Z-shaped; the left end of the horizontal handle (1) is fixedly connected to the upper end of the left vertical arm (3), and the right end of the horizontal handle (1) is fixedly connected to the upper end of the right vertical arm (2); the left end of the fulcrum ring (4) is fixedly connected to the lower end of the left vertical arm (3), and the right end of the fulcrum ring (4) is fixedly connected to the lower end of the right vertical arm (2); an arc groove is provided on the side wall of the lower part of the fulcrum ring (4), and the arc groove is arranged along the circumferential direction of the fulcrum ring (4); the upper end of the hook (5) is rotatably connected to the groove wall at one end of the arc groove, and the lower end of the hook (5) is provided with a hook head (51); The heat shield (8) is provided with a flange on the outside, and a radial through hole is provided on the flange; when the hook head (51) is connected to the heat shield (8), the hook head (51) is inserted into the through hole; When the special disassembly tool is used to disassemble the heat shield (8) from the combustion chamber casing (7), the hook head (51) is connected to the heat shield (8), and the outer wall of the fulcrum ring (4) abuts against the inner edge of the outer flange (72). When the horizontal handle (1) is manually pulled, the fulcrum ring (4) rotates in the circumferential direction, so that the hook (5) is continuously lifted and moved into the arc groove; when the height of the hook (5) is raised, the heat shield (8) is continuously pulled out of the annular groove (73) of the combustion chamber casing (7); When the right vertical arm (2) and the left vertical arm (3) swing to a certain angle, the right vertical arm (2) and the left vertical arm (3) will abut against the protrusions on the outer edge of the outer flange (72), and the contact point between the right vertical arm (2) and the left vertical arm (3) and the outer flange (72) will be used as a fulcrum, so that the fulcrum ring (4) will be tilted and disengaged from the outer flange (72), so that the heat shield (8) can be further detached from the combustion chamber casing (7).
2. The special disassembly tool for the heat shield of the combustion chamber of a gas turbine according to claim 1, characterized in that: The width of the upper portion of the hook (5) is smaller than the width of the arc-shaped groove, so that the arc-shaped groove can accommodate the hook (5).
3. The special disassembly tool for the heat shield of the combustion chamber of a gas turbine according to claim 2, characterized in that: The arc groove is in a semicircular arc shape.
4. The special disassembly tool for the heat shield of the combustion chamber of a gas turbine according to claim 3, characterized in that: The upper end of the hook (5) is connected to a rotating pin (6), and is rotatably connected to the fulcrum ring (4) via the rotating pin (6).
5. The special disassembly tool for the heat shield of the combustion chamber of a gas turbine according to any one of claims 1 to 4, characterized in that: The heat insulation screen (8) is in the shape of a cone disk. When the heat insulation screen (8) is in the installed state, the inner edge of the heat insulation screen (8) is connected to the inner flange at the combustion chamber outlet (71), and the inner edge of the heat insulation screen (8) is tightly matched with the groove wall of the annular groove (73).
6. The special disassembly tool for the heat shield of the combustion chamber of a gas turbine according to claim 5, characterized in that: After the heat shield (8) is lifted up by the disassembly tool, the distance D between the inner edge of the heat shield (8) and the combustion chamber outlet (71) is 32 mm ± 2 mm.
Citation Information
Patent Citations
Replacing method of sealing ring of press machine oil cylinder
CN109551419A
Bearing cap dismounting tool
CN209319643U