A coupling device for a GE gas turbine combustor diffuser connecting flange

Abstract

The utility model relates to a kind of coupling device of GE gas turbine diffusion section connecting flange, comprising: diffusion pipe, flange one and flange two, the flange one is fixedly connected on diffusion pipe, the flange two is fixedly connected with positioning pipe, the positioning groove for positioning pipe entering is set in the flange one, the movable block is slidably connected on the flange one, two are slidably connected on the movable block Connection ring, the connection ring is fixedly connected with fixed block, the flange one is penetrated by several insertion slots, the fixed groove for fixed block entering is set in the positioning pipe, the connection ring is provided with fixing piece, this fixing piece can be fixed to connection ring, reduce the oxidation corrosion problem of traditional bolt connection.

Description

Technical Field

[0001] This utility model relates to the technical field of flange connection structure of gas turbine diffuser section, and in particular to a coupling device for a GE gas turbine diffuser section connection flange. Background Technology

[0002] The GE gas turbine diffuser is a special flow channel structure installed at the exhaust end of the gas turbine. Its main function is to expand and decelerate the high-temperature gas and increase its static pressure by increasing the flow cross-sectional area. The connection method of the gas turbine diffuser, i.e., the coupling method, is the same as the conventional mechanical connection scheme between the gas turbine diffuser and the turbine exhaust cylinder, which uses a rigid connection method of mating flanges and bolt assemblies. In specific implementation, the mating surfaces of the machined flanges are axially fitted so that the fixing holes of the two sets of flanges form concentric through holes. Then, standard external thread bolts are inserted, and internal thread nuts are screwed on the ends of the bolts. The axial preload is generated by the face contact between the end face of the nut and the back of the flange, which finally achieves the airtight mechanical connection between the diffuser and the exhaust cylinder.

[0003] This traditional approach presents two typical engineering problems: First, under high temperature and humidity conditions, the threaded engagement parts of the bolt pair (the kinematic pair formed by the bolt shank and nut) are prone to oxidation and corrosion, leading to an enhanced thread self-locking effect. When maintenance personnel use hand tools for disassembly, the additional frictional torque generated by corrosion significantly increases the loosening resistance, and in severe cases, may cause the threaded pair to seize, greatly reducing maintenance efficiency. Second, during the initial installation phase, operators need to continuously apply rotational torque to complete the tightening operation of each nut. This repetitive manual labor not only increases assembly time but also reduces construction convenience in space-constrained installation locations. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the prior art and to propose a coupling device for the connecting flange of the diffuser section of a GE gas turbine, which can fix the flange.

[0005] To achieve the above objectives, this utility model proposes a coupling device for the diffuser section connecting flange of a GE gas turbine, comprising: a diffuser pipe, a first flange, and a second flange.

[0006] The first flange is fixedly connected to the diffuser tube, the second flange is fixedly connected to the positioning tube, and the first flange has a positioning groove for the positioning tube to enter.

[0007] A movable block is slidably connected to the flange one, and two opposing connecting rings are oscillatingly connected to the movable block. A fixing block three is fixedly connected to the connecting rings. Several slots are penetrating the flange one, and a fixing groove for the fixing block three to enter is opened on the positioning tube.

[0008] The connecting ring is provided with a fixing component, which can fix the connecting ring.

[0009] Preferably, the fixing component includes a fixing block one, a fixing block two, and a connecting hook. The fixing block one is fixedly connected to one of the connecting rings, while the fixing block two is fixedly connected to the other connecting ring. The connecting hook is rotatably connected to the fixing block two by a torsion spring and can hook the fixing block one.

[0010] Preferably, a connecting rod is fixedly connected to the fixing block, a baffle is fixedly connected to the connecting rod, and the connecting hook can hook the connecting rod.

[0011] Preferably, the movable block is oscillatingly connected to a connecting cover, the connecting cover is rotatably connected to a fixing ring, and the diffuser is fixedly connected to a tension hook, the fixing ring being able to hook the tension hook.

[0012] Preferably, the fixing ring includes a support ring rotatably connected to the connecting cover and a connecting rod slidably connected to the support ring. A nut is threaded onto the connecting rod 2, and a hook is fixedly connected to the other end of the connecting rod 2, which can hook the tension hook.

[0013] Preferably, a square positioning rod is fixedly connected to the second flange, and a square groove is passed through the first flange for the square positioning rod to enter.

[0014] Preferably, a sealing ring is fixedly connected to the second flange, which can be attached to the first flange.

[0015] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model significantly improves the reliability and maintenance convenience of flange connections through multi-level mechanical linkage. The cooperation between the positioning tube and the positioning groove forms an initial alignment reference. Subsequently, the swing connecting ring drives the fixing block through the slot and embeds it into the fixing groove, achieving the first mechanical locking. The snap-fit ​​structure of the connecting hook and the connecting rod locks the relative position of the two connecting rings, ensuring that the fixing block remains embedded. The engagement of the tension hook and the hook with the nut generates axial tension, causing the flanges to press against each other. The geometric fit between the square positioning rod and the square groove constrains the circumferential displacement of the flanges, while the sealing ring fills the microscopic gaps in the contact surface. This purely mechanical linkage design reduces the oxidation and corrosion problems of traditional bolted connections. During disassembly, there is no need to overcome the additional frictional torque caused by rust, significantly improving maintenance efficiency. At the same time, it eliminates the repetitive operation of tightening bolts one by one with manual tools, greatly shortening assembly time, and is especially suitable for installation environments with limited space.

[0016] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the present invention AA;

[0019] Figure 3 This is a schematic diagram showing the position of the fixing component of this utility model;

[0020] Figure 4 This is a schematic diagram showing the position of the square groove in this utility model.

[0021] In the diagram: 1. Diffuser; 2. Flange 1; 3. Flange 2; 4. Positioning tube; 5. Positioning groove; 6. Moving block; 7. Connecting ring; 8. Fixing block 3; 9. Slot; 10. Fixing groove; 11. Fixing component; 12. Fixing block 1; 13. Fixing block 2; 14. Connecting hook; 15. Connecting rod 1; 16. Baffle; 17. Connecting cover; 18. Fixing ring; 19. Tensioning hook; 20. Support ring; 21. Connecting rod 2; 22. Nut; 23. Hook; 24. Square positioning rod; 25. Square groove; 26. Sealing ring. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] like Figures 1 to 4 A coupling device for a GE gas turbine diffuser section connecting flange includes: a diffuser pipe 1, a flange 1 2, and a flange 2 3.

[0027] Flange 1 2 is fixedly connected to diffuser 1, and flange 2 3 is fixedly connected to positioning tube 4. Flange 1 2 has a positioning groove 5 for positioning tube 4 to enter, and the positioning groove 5 is used to position positioning tube 4.

[0028] After the positioning tube 4 is positioned, a moving block 6 is slidably connected to flange 2, and two opposing connecting rings 7 are oscillatingly connected to the moving block 6. A fixing block 8 is fixedly connected to the connecting ring 7. Several slots 9 pass through flange 2, and a fixing groove 10 is opened on the positioning tube 4 for the fixing block 8 to enter. Therefore, by the oscillation of the connecting ring 7, the connecting ring 7 drives the fixing block to enter the fixing groove 10 through the slot 9, thereby fixing the positioning tube 4, thus fixing flange 2 and flange 3. When the connecting rings 7 need to be fixed, a fixing member 11 is provided on the connecting ring 7. The fixing member 11 can fix the connecting ring 7. Therefore, the two connecting rings 7 can be fixed by the fixing member 11.

[0029] Specifically, the fastener 11 includes a first fixing block 12, a second fixing block 13, and a connecting hook 14. The first fixing block 12 is fixedly connected to one of the connecting rings 7, while the second fixing block 13 is fixedly connected to the other connecting ring 7. The connecting hook 14 is rotatably connected to the second fixing block 13 by a torsion spring. A first connecting rod 15 is fixedly connected to the first fixing block 12, and a baffle 16 is fixedly connected to the first connecting rod 15. The connecting hook 14 can hook the first connecting rod 15. Therefore, by hooking the first connecting rod 15 with the connecting hook 14, the first fixing block 12 and the second fixing block 13 are fixedly fixed.

[0030] Specifically, a connecting cover 17 is oscillatingly connected to the movable block 6, and a fixing ring 18 is rotatably connected to the connecting cover 17. A tension hook 19 is fixedly connected to the diffuser 1. The fixing ring 18 can hook the tension hook 19. The fixing ring 18 includes a support ring 20 rotatably connected to the connecting cover 17 and a connecting rod 21 slidably connected to the support ring 20. A nut 22 is threadedly connected to the connecting rod 21, and a hook 23 is fixedly connected to the other end of the connecting rod 21. The hook 23 can hook the tension hook 19. Therefore, by having a person hook the hook 23 to the tension hook 19, and by using the oscillation of the support ring 20, the flange 2 and flange 3 can be tightened and fixed. The position of the connecting rod 21 can be adjusted by rotating the nut 22.

[0031] Specifically, a square positioning rod 24 is fixedly connected to flange 23, and a square groove 25 is passed through flange 12 for the square positioning rod 24 to enter. By allowing the square positioning rod 24 to enter the square groove 25, the positioning of flange 12 and flange 23 can be achieved.

[0032] Specifically, a sealing ring 26 is fixedly connected to flange 2, which can be in contact with flange 2. By the contact between the sealing ring 26 and flange 2, a seal is achieved between flange 2 and flange 3.

[0033] The working principle of this utility model is as follows: high-precision positioning and sealing of the flange are achieved through multi-stage mechanical linkage. When the positioning tube 4 is inserted into the positioning groove 5 of the flange 2, the two mirror-symmetrical connecting rings 7 swing. During the swing, the fixing block 8 on the inner wall of the connecting ring 7 passes through the slot 9 of the flange 2 and embeds into the fixing groove 10 on the outer wall of the positioning tube 4, forming the first mechanical lock. At this time, the fixing member 11 between the connecting rings 7 begins to function: the connecting hook 14 rotates under the action of the torsion spring and hooks the connecting rod 15 of the fixing block 12. Its end baffle 16 and the fixing block 23 form a snap-fit ​​structure, locking the relative position of the two connecting rings 7 and ensuring that the fixing block 38 remains embedded. At this time, the tension hook 19 on the diffuser 1 and the hook 23 of the connecting rod 21 engage through the rotation of the support ring 20. Tightening the nut 22 can generate axial tension, pressing the flange 23 towards the flange 2. During this process, the square positioning rod 24 on flange 23 and the square groove 25 on flange 12 form a geometric fit, constraining the circumferential displacement of flange 23, while the sealing ring 26 of flange 23 is compressed and deformed to fill the microscopic gaps in the contact surface of flange 12.

[0034] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A coupling device for a GE gas turbine diffuser section connecting flange, comprising: The diffuser (1), flange one (2), and flange two (3) are characterized in that, The flange one (2) is fixedly connected to the diffuser (1), the flange two (3) is fixedly connected to the positioning tube (4), and the flange one (2) is provided with a positioning groove (5) for the positioning tube (4) to enter. A movable block (6) is slidably connected to the flange (2), and two connecting rings (7) are swayingly connected to the movable block (6) in opposite positions. A fixed block (8) is fixedly connected to the connecting ring (7). Several slots (9) are penetrating the flange (2), and a fixed groove (10) is opened on the positioning tube (4) for the fixed block (8) to enter. The connecting ring (7) is provided with a fixing member (11), which can fix the connecting ring (7).

2. The coupling device for the GE gas turbine diffuser section connecting flange according to claim 1, characterized in that, The fastener (11) includes a first fixing block (12), a second fixing block (13), and a connecting hook (14). The first fixing block (12) is fixedly connected to one of the connecting rings (7), while the second fixing block (13) is fixedly connected to the other connecting ring (7). The connecting hook (14) is rotatably connected to the second fixing block (13) by a torsion spring and can hook the first fixing block (12).

3. The coupling device for the GE gas turbine diffuser section connecting flange according to claim 2, characterized in that, A connecting rod (15) is fixedly connected to the fixing block (12), a baffle (16) is fixedly connected to the connecting rod (15), and the connecting hook (14) can hook the connecting rod (15).

4. The coupling device for the GE gas turbine diffuser section connecting flange according to claim 1, characterized in that, The movable block (6) is oscillatingly connected to a connecting cover (17), and a fixing ring (18) is rotatably connected to the connecting cover (17). A tension hook (19) is fixedly connected to the diffuser tube (1), and the fixing ring (18) can hook the tension hook (19).

5. The coupling device for the GE gas turbine diffuser section connecting flange according to claim 4, characterized in that, The fixing ring (18) includes a support ring (20) rotatably connected to the connecting cover (17) and a connecting rod (21) slidably connected to the support ring (20). A nut (22) is threaded onto the connecting rod (21), and a hook (23) is fixedly connected to the other end of the connecting rod (21). The hook (23) can hook the tension hook (19).

6. The coupling device for the GE gas turbine diffuser section connecting flange according to claim 1, characterized in that, A square positioning rod (24) is fixedly connected to the second flange (3), and a square groove (25) is passed through the first flange (2) for the square positioning rod (24) to enter.

7. The coupling device for the GE gas turbine diffuser section connecting flange according to claim 6, characterized in that, A sealing ring (26) is fixedly connected to the second flange (3), and the sealing ring (26) can be attached to the first flange (2).

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