A hoisting tool for assembling a fuel nozzle to a combustion chamber of a gas turbine
Patent Information
- Application Number
- CN202522135302.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-10-10
AI Technical Summary
[0009]本发明实现了燃料喷嘴与燃料喷嘴嵌入安装孔的精准定位与移动装配，克服了吊装装配需反复调整的缺陷；本发明通过在吊起的燃料喷嘴的装配工装上增加配重机构及可调整力矩连杆，实现了装配过程中处于空中悬吊的燃料喷嘴倾斜角度的便捷调整；通过设置临时的定位导向杆，实现了燃料喷嘴的精准入孔，最大程度地保护了燃料喷嘴上高温耐热涂层免受磕碰；在工装上设置可使燃料喷嘴外端的法兰盘板平行推进的机构，实现了燃料喷嘴装配最后环节的精准推进到位；本发明大大提升了吊装的精准度，减少了靠人力经验进行定位操作的环节，简化了流程，节省了工时，实现了现场吊装的高质量和高效率的实施。
Smart Images
Figure CN224691627U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a lifting fixture, and more particularly to a lifting fixture for assembling fuel nozzles for a gas turbine combustion chamber. Background Technology
[0002] A gas turbine consists of components such as a compressor, combustion chamber, and turbine. The compressor is responsible for compressing and pressurizing the air entering the turbine. The combustion chamber is used for the combustion of natural gas mixed with the compressed air. The resulting high-temperature, high-pressure gas enters the turbine to perform work, driving a generator set to produce electricity. Several fuel nozzles are installed on the combustion chamber casing of the gas turbine. These nozzles are arranged in a ring on the casing, with their central axes arranged radially at a 45-degree angle. The gas turbine's combustion chamber is manufactured, processed, and assembled at the manufacturer. After completion, the gas turbine body and intake nozzles are transported to the power plant's workshop for on-site assembly of the fuel nozzle assembly. Fuel nozzle mounting holes are evenly spaced on the same circumference of the combustion chamber casing. On-site workers typically use an overhead crane in the workshop to hoist the fuel nozzles to the mounting holes outside the combustion chamber, and then insert them into the mounting holes. The fit between the fuel nozzle mounting holes and the fuel nozzles is only a few micrometers, requiring extremely high assembly precision. Because the fuel nozzles are coated with a high-temperature resistant coating, the assembly process... During assembly, it is crucial to avoid damaging the high-temperature resistant coating on the fuel nozzle while simultaneously controlling the gap between them, making assembly exceptionally difficult. Furthermore, a flange plate for fixing the fuel nozzle is located on the outer end of the fuel nozzle's tail. A threaded mounting flange with a threaded hole is located on the outer ring of the fuel nozzle's insertion mounting hole on the combustion chamber housing. After the cylindrical fuel nozzle is inserted into the mounting hole, a connecting bolt is inserted between the mounting flange and the fuel nozzle's flange plate. Tightening the threaded bolt completes the final fixation of the fuel nozzle. However, due to the fuel nozzle's insertion... The reason why the clearance between the mounting hole seat and the fuel nozzle is only a few millimeters is that, during the final tightening process of the fuel nozzle, the process requires that the flange plate at the tail of the fuel nozzle be pushed horizontally and evenly along the central axis of the mounting hole seat. During this pushing process, the flange plate must always remain perpendicular to the central axis of the mounting hole seat to avoid the fuel nozzle rubbing against the inner wall of the mounting hole seat during the final connection and tightening of the two flanges, which would damage the high-temperature heat-resistant coating. Such high assembly requirements mean that the operation of tightening the bolts around the flange on site cannot be carried out using the conventional bolt tightening method. Summary of the Invention
[0003] This invention provides a hoisting fixture for assembling fuel nozzles into the combustion chamber of a gas turbine, enabling accurate positioning and rapid installation of the fuel nozzles during the assembly process.
[0004] The present invention solves the above technical problems through the following technical solutions: A lifting fixture for assembling a fuel nozzle into a gas turbine combustion chamber includes a disc-shaped conical seat on the combustion chamber, a cylindrical fuel nozzle, and a fixture sleeve. Fuel nozzle insertion holes are evenly spaced at the same circumference of the disc-shaped conical seat. A flange is provided outside the opening of each fuel nozzle insertion hole, and bolt connection holes are provided on the flange. A circular flange plate is provided at the tail end of the fuel nozzle. Fuel nozzle fixing bolts have through holes spaced apart on the outer circumference of the circular flange plate, and these through holes correspond to the bolt connection holes on the flange. A rear flange is correspondingly provided on the outer wall of the fixture sleeve. The lifting lugs and front lifting lugs have a sleeve connecting disc fixedly connected to the left end of the tooling sleeve. The sleeve connecting disc is fixed to the cross-shaped channel steel base. L-shaped connecting seats are provided on the four outer ends of the cross-shaped channel steel base. The L-shaped connecting seats are fixedly connected to the circular flange plate of the fuel nozzle through L-shaped connecting seat connecting bolts, so that the fuel nozzle, the cross-shaped channel steel base and the tooling sleeve are connected as a whole. A lifting rope is connected between the rear lifting lug and the front lifting lug, and the lifting rope is hooked to the lifting hook. A telescopic rod is movably inserted into the right end of the tooling sleeve. A counterweight connecting bolt is provided at the right end of the telescopic rod. A counterweight is connected to the lower end of the counterweight connecting bolt. A set screw is provided between the tooling sleeve and the telescopic rod.
[0005] On the bolt holes of the flange seat with 120 arc degrees of equal interval, a first guide rod, a second guide rod, and a third guide rod are respectively connected; the outer ends of the first guide rod, the outer ends of the second guide rod, and the outer ends of the third guide rod are all movably inserted into the fuel nozzle fixing bolts that are spaced apart on the corresponding outer ring of the circular flange plate and pass through the through holes.
[0006] A central stud is provided in the middle of the right facade of the cross-shaped channel steel base, and a nut is screwed onto the central stud.
[0007] A method for hoisting a fuel nozzle into a gas turbine combustion chamber using a hoisting fixture, characterized by the following steps: The first step is to use lifting equipment to hoist the fuel nozzle, which is connected as a whole, the cross-shaped channel steel base, and the tooling sleeve, onto the outside of the mounting hole of the disc-shaped conical seat in the combustion chamber. The second step is to connect the first guide rod, the second guide rod, and the third guide rod to the bolt holes on the flange of the seat, with the three guide rods spaced 120 arcs apart from each other. The third step is to adjust the weight of the counterweight and the extension length of the telescopic rod to make the central axis of the fuel nozzle parallel to the three guide rods. Step 4: Using lifting equipment, move the adjusted fuel nozzle to the fuel nozzle embedding mounting hole, and make the outer ends of the three guide rods pass through the corresponding fuel nozzle fixing bolts that are spaced apart on the outer ring of the circular flange plate and pass through the through holes. Step 5: Guided by the three guide rods, insert the fuel nozzle into the fuel nozzle mounting hole; Step 6: By rotating the nut, the nut pushes the circular flange plate to move parallel to the fuel nozzle insertion mounting hole until it is in place; Step 7: Pass the fixing bolt through the through hole of the fuel nozzle fixing bolt and screw it into the bolt connection hole on the flange of the seat, so that the fuel nozzle is securely fixed in the fuel nozzle mounting hole.
[0008] Step 8: Remove the connecting bolts of the L-shaped connector to separate the cross-shaped channel steel base from the circular flange plate; then remove the three guide rods from the fuel nozzle insertion mounting hole. Step 9: Repeat steps 1 through 7 to install the second fuel nozzle.
[0009] This invention achieves precise positioning and movable assembly of the fuel nozzle and its embedded mounting hole, overcoming the shortcomings of repeated adjustments required in hoisting assembly. By adding a counterweight mechanism and an adjustable torque linkage to the assembly fixture of the hoisted fuel nozzle, the invention enables convenient adjustment of the tilt angle of the fuel nozzle suspended in the air during assembly. By setting a temporary positioning guide rod, precise insertion of the fuel nozzle into the hole is achieved, maximizing protection of the high-temperature heat-resistant coating on the fuel nozzle from impacts. A mechanism on the fixture allows the flange plate at the outer end of the fuel nozzle to be pushed parallel, achieving precise advancement into place in the final stage of fuel nozzle assembly. This invention significantly improves hoisting accuracy, reduces the need for manual positioning operations, simplifies the process, saves time, and enables high-quality and high-efficiency on-site hoisting. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the disc-shaped conical seat 19 of the present invention in the right view direction; Figure 3 This is a schematic diagram of the structure of the fuel nozzle 15 of the present invention; Figure 4 This is a schematic diagram of the structure of the circular flange plate 16 of the present invention; Figure 5This is a schematic diagram of the tooling frame of the present invention; Figure 6 This is a schematic diagram of the structure of the present invention when the second fuel nozzle is installed; Figure 7 This is a schematic diagram of the structure of the present invention when the third fuel nozzle is installed. Detailed Implementation
[0011] The present invention will now be described in detail with reference to the accompanying drawings: A hoisting fixture for assembling a fuel nozzle into a gas turbine combustion chamber includes a disc-shaped conical seat 19 on the combustion chamber, a cylindrical fuel nozzle 15, and a fixture sleeve 3. Fuel nozzle insertion and mounting holes 18 are provided at equal intervals along the same circumference of the disc-shaped conical seat 19. A flange 23 is provided outside the opening of each fuel nozzle insertion and mounting hole 18, and bolt connection holes 24 are provided on the flange 23. The fuel nozzle 15 is assembled into the combustion chamber from the outside of the combustion chamber. A circular flange plate 16 is provided at the tail of the fuel nozzle 15. Fuel nozzle fixing bolts are provided at intervals through holes on the outer circumference of the circular flange plate 16. 17. The fuel nozzle fixing bolts pass through the through hole 17 and are correspondingly set with the bolt connection hole 24 on the flange seat. After the fuel nozzle 15 is inserted into the fuel nozzle embedding installation hole 18, the circular flange plate 16 is pushed further inward to make the fuel nozzle 15 further embedded in place, and finally, it is fixed in the fuel nozzle embedding installation hole 18. The outer side wall of the tooling sleeve 3 is provided with a rear lifting lug 5 and a front lifting lug 6. The left end of the tooling sleeve 3 is fixedly connected to the sleeve connecting disc 2. The sleeve connecting disc 2 is fixed on the cross-shaped channel steel base 1. On the four outer ends of the cross-shaped channel steel base 1, there are L-shaped connecting seats 12. The L-shaped connecting seats 12 are connected by L-shaped connecting discs. The connecting bolts of the L-shaped connector 12 are fixedly connected to the circular flange plate 16 of the fuel nozzle 15. Multiple fuel nozzle fixing bolts are evenly spaced and pass through through holes 17 on the outer ring of the circular flange plate 16. The L-shaped connector 12 connects the tooling frame to the circular flange plate 16 on the fuel nozzle 15 through these holes, thus connecting the fuel nozzle 15, the cross-shaped channel steel base 1, and the tooling sleeve 3 into a single unit. A lifting rope 10 is connected between the rear lifting lug 5 and the front lifting lug 6, and the lifting rope 10 is attached to the hook 11. The lifting equipment suspends the integrated fuel nozzle 15, cross-shaped channel steel base 1, and tooling sleeve 3 in the air via the lifting rope 10. A telescopic rod 7 is movably inserted into the right port. A counterweight connecting bolt 8 is provided at the right end of the telescopic rod 7. A counterweight 9 is connected to the lower end of the counterweight connecting bolt 8. A set screw 4 is provided between the tooling sleeve 3 and the telescopic rod 7. The hook 11 is connected to the rear lifting lug 5 and the front lifting lug 6 through the lifting rope 10, forming a support for the integrated fuel nozzle 15, the cross-shaped channel steel base 1 and the tooling sleeve 3. By moving the telescopic rod 7 in the tooling sleeve 3, the tilt angle of the integrated fuel nozzle 15, the cross-shaped channel steel base 1 and the tooling sleeve 3 is changed, so that the central axis of the fuel nozzle 15 coincides with the central axis of the fuel nozzle insertion mounting hole 18, so that the fuel nozzle 15 can be smoothly inserted into the hole.
[0012] On the bolt connection holes 24 of the flange seat with equal intervals of 120 arcs, a first guide rod 20, a second guide rod 22, and a third guide rod 23 are respectively connected. The outer ends of the first guide rod 20, the second guide rod 22, and the third guide rod 23 are all movably inserted into the corresponding fuel nozzle fixing bolts arranged at intervals on the outer ring of the circular flange plate 16, which pass through the through holes 17. Through the guidance of the three guide rods, the fuel nozzle 15 is accurately inserted into the fuel nozzle embedding installation hole 18, preventing collision between the two during the insertion process.
[0013] A central stud 13 is provided in the middle of the right side of the cross-shaped channel steel base (1), and a nut 14 is screwed onto the central stud 13. When the fuel nozzle 15 is accurately inserted into the fuel nozzle embedding installation hole 18, the nut 14 is rotated to push the circular flange plate 16 further into the hole. During this process, the nut 14 pushes the circular flange plate 16, realizing the forward movement of the fuel nozzle 15 along the central axis of the fuel nozzle embedding installation hole 18. This overcomes the problem that the fuel nozzle 15 is prone to eccentricity during the final forward movement when the circular flange plate 16 is tightened, which can lead to the scratching and damage of the high-temperature heat-resistant coating on it.
[0014] A method for hoisting a fuel nozzle into a gas turbine combustion chamber using a hoisting fixture, characterized by the following steps: Step 1: Using lifting equipment, the fuel nozzle 15, the cross-shaped channel steel base 1, and the tooling sleeve 3, which are connected as a whole, are lifted and installed onto the outside of the mounting hole 18 on the disc-shaped conical seat 19 of the combustion chamber. The second step is to connect the first guide rod 20, the second guide rod 21 and the third guide rod 22 to the bolt connection holes 24 on the flange seat respectively. The three guide rods are set 120 arc degrees apart from each other. The third step is to adjust the weight of the counterweight 9 and the extension length of the telescopic rod 7 to make the central axis of the fuel nozzle 15 parallel to the three guide rods. Step 4: Using lifting equipment, move the adjusted fuel nozzle 15 to the fuel nozzle embedding mounting hole 18, and make the outer ends of the three guide rods pass through the corresponding fuel nozzle fixing bolts set at intervals on the outer ring of the circular flange plate 16 and pass through the through hole 17. Step 5: Guided by the three guide rods, insert the fuel nozzle 15 into the fuel nozzle mounting hole 18; Step 6: By rotating nut 14, nut 14 pushes the circular flange plate 16 to move parallel to the fuel nozzle insertion mounting hole 18 until it is in place; Step 7: After the fixing bolt passes through the through hole 17, it is screwed into the bolt connection hole 24 on the flange seat, so that the fuel nozzle 15 is securely fixed in the fuel nozzle embedding installation hole 18.
[0015] Step 8: Remove the connecting bolts of the L-shaped connecting seat to separate the cross-shaped channel steel base 1 from the circular flange plate 16; then remove the three guide rods from the fuel nozzle embedded mounting hole 18. Step 9: Repeat steps 1 through 7 to install the second fuel nozzle.
Claims
1. A hoisting fixture for assembling a fuel nozzle into a gas turbine combustion chamber, comprising a disc-shaped conical seat (19) on the combustion chamber, a cylindrical fuel nozzle (15), and a fixture sleeve (3), wherein fuel nozzle insertion mounting holes (18) are provided at equal intervals on the same circumference of the disc-shaped conical seat (19), a mounting flange (23) is provided on the outside of the opening of the fuel nozzle insertion mounting hole (18), bolt connection holes (24) are provided on the mounting flange (23), a circular flange plate (16) is provided at the tail of the fuel nozzle (15), and fuel nozzle fixing bolt through holes (17) are provided at intervals on the outer ring of the circular flange plate (16), wherein the fuel nozzle fixing bolt through holes (17) and the bolt connection holes (24) on the mounting flange are correspondingly provided; characterized in that, A rear lifting lug (5) and a front lifting lug (6) are correspondingly provided on the outer side wall of the tooling sleeve (3). A sleeve connecting disc (2) is fixedly connected to the left end of the tooling sleeve (3). The sleeve connecting disc (2) is fixed on the cross-shaped channel steel base (1). On the four outer ends of the cross-shaped channel steel base (1), there are L-shaped connecting seats (12). The L-shaped connecting seats (12) are fixedly connected to the circular flange plate (16) of the fuel nozzle (15) by L-shaped connecting seat connecting bolts, so that the fuel nozzle ( 15) The cross-shaped channel steel base (1) and the tooling sleeve (3) are connected as a whole; a lifting rope (10) is connected between the rear lifting lug (5) and the front lifting lug (6), and the lifting rope (10) is hooked on the hook (11); a telescopic rod (7) is movably inserted into the right end of the tooling sleeve (3), a counterweight connecting bolt (8) is provided at the right end of the telescopic rod (7), a counterweight (9) is connected at the lower end of the counterweight connecting bolt (8), and a set screw (4) is provided between the tooling sleeve (3) and the telescopic rod (7).
2. The hoisting fixture for assembling a fuel nozzle into a gas turbine combustion chamber according to claim 1, characterized in that, On the bolt connection holes (24) of the flange seat with equal intervals of 120 arcs, a first guide rod (20), a second guide rod (22), and a third guide rod (23) are respectively connected; the outer ends of the first guide rod (20), the outer ends of the second guide rod (22), and the outer ends of the third guide rod (23) are all movably inserted into the fuel nozzle fixing bolts that are spaced apart on the corresponding outer ring of the circular flange plate (16) and pass through the through holes (17).
3. The hoisting fixture for assembling a fuel nozzle into a gas turbine combustion chamber according to claim 2, characterized in that, A central stud (13) is provided in the middle of the right facade of the cross-shaped channel steel base (1), and a nut (14) is screwed onto the central stud (13).