Axial flow propeller unit water and shaft coupling reinstallation tool

Abstract

The utility model provides a kind of axial flow variable pitch unit water and electricity joint shaft back installation tool, belong to axial flow variable pitch water turbine technical field, this axial flow variable pitch unit water and electricity joint shaft back installation tool includes generator shaft, water turbine shaft, runner and rotor, water turbine shaft is installed in runner top, generator shaft is set in water turbine shaft top, rotor is installed in generator shaft top;The weight of water turbine shaft and runner can be transmitted to guide cone by bearing part, crane is connected together by connecting hole, so that water turbine shaft, runner, guide cone and support cover form a whole, whole can be lifted in the mode of three joint, avoid water and electricity joint shaft sealing secondary extrusion problem by optimizing back installation tool, greatly improve the durability and reliability of sealing, improve work efficiency, reduce work intensity, without multiple simultaneous operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of axial-flow propeller turbines, specifically relating to a tooling for reassembling the water-generator coupling of an axial-flow propeller unit. Background Technology

[0002] Southwestern Sichuan has abundant water resources in rivers such as the Jinsha River and the Dadu River, and many hydropower stations have been built there. For example, the Tongjiezi Hydropower Station on the Dadu River is equipped with several axial-flow propeller turbine generator units. During the overhaul and rotation phase of the axial-flow propeller units of the hydropower station, it is necessary to reinstall the turbine shaft, runner, guide cone, and support cover as a whole back into the machine pit.

[0003] In existing technology, a lifting mechanism is connected to the turbine shaft, and 6-8 hand-operated hoists are evenly installed around the circumference of the turbine shaft. One end of each hand-operated hoist is connected to the lifting mechanism. The even distribution of the hand-operated hoists ensures that the support cover experiences the same force at all points during the lifting process, and the other end of each hoist is connected to the support cover. The axial-flow propeller turbine is then raised as a whole by the lifting mechanism.

[0004] While this method can effectively improve the overall performance of axial-flow propeller turbines, in actual operation, it requires many people to operate the chain hoists simultaneously. It is difficult to ensure that the lifting speed and distance of each chain hoist are completely consistent, which easily leads to uneven force distribution. This makes lifting extremely difficult and time-consuming, greatly increasing the labor intensity of the workers. Utility Model Content

[0005] The purpose of this utility model is to provide a tooling for reassembling the water-generator coupling of an axial-flow propeller turbine unit, which aims to solve the problems of low working efficiency and high working intensity in the existing technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a water-generator coupling reassembly fixture for an axial-flow propeller turbine unit, comprising: a generator shaft, a turbine shaft, a runner, and a rotor, wherein the turbine shaft is installed on top of the runner, the generator shaft is installed on top of the turbine shaft, and the rotor is installed on top of the generator shaft.

[0007] A guide cone is provided on the top of the runner, and a support cover is installed on the top of the guide cone. A load-bearing component is installed on the outer circumference of the turbine shaft. The load-bearing component is connected to the guide cone and is used to transfer the weight on the turbine shaft to the guide cone.

[0008] As a preferred embodiment of the present invention, the generator shaft is provided with a first coupling flange at the bottom of the generator shaft, the turbine shaft is provided with a second coupling flange at the top of the turbine shaft, and a lifting device is provided at the connection between the generator shaft and the turbine shaft.

[0009] As a tooling for reassembling the water coupling of an axial-flow propeller turbine unit according to this utility model, preferably, a pad is provided at the end of the second coupling flange facing the first coupling flange.

[0010] As a preferred embodiment of the axial-flow propeller turbine unit water-generating coupling reassembly fixture of this utility model, the lifting device includes a fixture pad, a screw jack, and a fastening bolt. The fastening bolt passes through one end of the first coupling flange and the second coupling flange and is connected to the fixture pad. The screw jack is installed on the end of the fixture pad facing the first coupling flange, and the lifting end of the screw jack is connected to the second coupling flange.

[0011] As a tooling for reassembling the water-generating coupling of an axial-flow propeller turbine unit according to this utility model, preferably, the sealing material at the first coupling flange and the second coupling flange is fluororubber.

[0012] As a preferred embodiment of the present invention, the bearing component includes a fixed pressure plate, a fixed flange, and an annular fixed clamping block. A shaft collar is installed on the outer circumferential surface of the turbine shaft. The fixed pressure plate is sleeved on the outer circumferential surface of the turbine shaft collar. A limit groove is formed inside the fixed pressure plate. The shaft collar is disposed inside the limit groove. The bottom of the fixed flange is connected to the guide cone.

[0013] As a water-generator coupling reassembly tooling for an axial-flow propeller turbine unit according to this utility model, preferably, the shaft collar is an annular shaft collar, and an annular fixing block is installed at the bottom of the fixing plate. The annular fixing block is disposed inside the guide cone, and the shaft collar abuts against the top of the annular fixing block.

[0014] Compared with the prior art, the beneficial effects of this utility model are: 1. The water-generator coupling reassembly fixture of this axial-flow propeller unit can transfer the weight of the turbine shaft and runner to the guide cone through the load-bearing components. The crane connects the support cover together through the connection hole, so that the turbine shaft, runner, guide cone and support cover form a whole. The whole can be lifted by a three-way hoist, which improves work efficiency, reduces work intensity and does not require multiple people to operate at the same time.

[0015] 2. The axial-flow propeller turbine generator set's water-powered coupling reinstallation fixture, during the generator shaft reinstallation process, involves evenly placing gaskets on the second coupling flange face beforehand. This not only ensures the seal is not squeezed but also guarantees that the first and second coupling flange stops can interlock. This prevents oil leakage due to seal failure from occurring at this point.

[0016] 3. The water coupling reassembly tooling of this axial-flow propeller unit adopts new materials. The sealing material at the first and second coupling flanges has been changed from nitrile rubber to fluororubber, which solves the problems of low sealing elasticity, insufficient oil resistance, and insufficient corrosion resistance. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a front view of the turbine shaft, rotor, runner, guide cone, and support cover in a specific embodiment of this utility model; Figure 2 This is a three-dimensional structural diagram of the generator shaft and the turbine shaft in a specific embodiment of this utility model; Figure 3 This is a three-dimensional structural diagram of the load-bearing component in a specific embodiment of this utility model; Figure 4 This is a side view of a specific embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of AA.

[0018] In the diagram: 1. Generator shaft; 10. Turbine shaft; 11. Rotor; 12. Runner; 13. Guide cone; 14. Support cover; 141. Connecting hole; 15. First coupling flange; 151. Second coupling flange; 16. Pad plate; 21. Tooling pad; 22. Screw jack; 23. Fastening bolt; 24. Shaft collar; 25. Fixing pressure plate; 26. Fixing flange; 27. Annular fixing block. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-5This utility model provides the following technical solution: a tooling for reassembling the water-generator coupling of an axial-flow propeller turbine unit, comprising: a generator shaft 1, a turbine shaft 10, a runner 12, and a rotor 11. The turbine shaft 10 is mounted on top of the runner 12, the generator shaft 1 is positioned on top of the turbine shaft 10, and the rotor 11 is mounted on top of the generator shaft 1. The turbine shaft 10 is fixed to the runner 12 by bolts. A flange for fixing is provided at the bottom of the turbine shaft 10, and a flange for fixing is provided at the top of the generator shaft 1 (e.g., a flange for fixing the turbine shaft 1). Figure 2 As shown in the figure, the generator shaft 1 is connected to the rotor 11 via a flange, which is existing technology and will not be described in detail here.

[0021] The top of the runner 12 is provided with a guide cone 13, and a support cover 14 is installed on the top of the guide cone 13. The turbine shaft 10 slides through the upper and lower ends of the guide cone 13, and the turbine shaft 10 can slide up and down inside the guide cone 13.

[0022] The guide cone 13 is connected to the support cover 14 by bolts. The support cover 14 and the guide cone 13 are fixed inside the machine pit. The guide cone 13 and the support cover 14 are both existing technologies and will not be described in detail here.

[0023] A load-bearing component is installed on the outer circumference of the turbine shaft 10. The load-bearing component is connected to the guide cone 13. The load-bearing component is used to transfer the weight of the turbine shaft 10 to the guide cone 13, so that the turbine shaft 10, the runner 12, the guide cone 13 and the support cover 14 form a whole. The support cover 14 has a connecting hole 141. During the disassembly of the turbine, the crane can connect the turbine shaft 10, the support cover 14 and the runner 12 through the connecting hole 141 and the load-bearing component. The whole is lifted out of the pit by a three-pronged crane. The crane used is a general crane, which will not be described in detail here.

[0024] The load-bearing components include a fixed pressure plate 25, a fixed flange 26, and an annular fixing block 27. The fixed pressure plate 25 is fitted onto the outer circumferential surface of the turbine shaft 10. A limit groove is formed inside the fixed pressure plate, and the shaft collar 24 is installed inside the limit groove. The fixed flange 26 is installed on the outer circumferential surface of the fixed pressure plate 25. The fixed flange 26 and the fixed pressure plate 25 can be disassembled from the left or right (e.g., ...). Figure 3 As shown), the fixed pressure plate 25 is connected to the load-bearing body by bolts, the bottom of the fixed flange 26 is connected to the top of the guide cone 13, bolt holes are provided on the guide cone 13, and an annular fixing block 27 is provided at the bottom of the fixed pressure plate 25. The fixed pressure plate 25 can be separated from the annular fixing block 27. The annular fixing block 27 is located inside the guide cone 13, and the shaft collar 24 is located at the top of the annular fixing block 27. The annular fixing block 27 and the shaft collar 24 can prevent the turbine shaft 10 from moving downward inside the guide cone 13 (e.g., Figure 4 and Figure 5(As shown).

[0025] Please see Figure 1-3 It is inserted into the guide cone 13 by means of the annular fixing block 27 and the fixing pressure plate 25 (e.g. Figure 1 As shown), the fixed flange 26 is connected to the guide cone 13 by bolts. The fixed pressure plate 25 can be connected to the turbine shaft 10 by the shaft collar 24 and the limiting groove, thereby transferring the weight of the turbine shaft 10 to the guide cone 13.

[0026] A first coupling flange 15 is provided at the bottom of the generator shaft 1, and a second coupling flange 151 is provided at the top of the turbine shaft 10. A lifting device is provided at the connection between the generator shaft 1 and the turbine shaft 10. A sealing ring (not shown in the figure) is provided at one end of the first coupling flange 15 and the second coupling flange 151. This is the prior art and will not be described in detail here.

[0027] The sealing material used at the first coupling flange 15 and the second coupling flange 151 is fluororubber. Fluororubber can improve the sealing elasticity of the connection between the turbine shaft 10 and the generator shaft 1, and improve oil resistance and corrosion resistance.

[0028] A gasket 16 is provided at one end of the first coupling flange 15 and the second coupling flange 151. The gasket 16 is made of polytetrafluoroethylene (PTFE). The thickness of the PTFE gasket is 10 mm, which is less than the height of the sealing ring stop 15 mm, to ensure that the gasket 16 will not damage the sealing surfaces of the first coupling flange 15 and the second coupling flange 151. The gasket 16 is evenly distributed between the first coupling flange 15 and the second coupling flange 151 (e.g., Figure 2 As shown, the pad 16 is to prevent the first coupling flange 15 and the second coupling flange 151 from squeezing each other during the reinstallation of the generator shaft, which would damage the sealing ring and affect its sealing performance.

[0029] The lifting device includes a tooling block 21, a screw jack 22, and a fastening bolt 23. The fastening bolt 23 passes through the first coupling flange 15 and the second coupling flange 151 and is connected to the tooling block 21. The screw jack 22 is installed on the end of the tooling block 21 facing the first coupling flange 15. The lifting end of the screw jack 22 is connected to the second coupling flange 151. The lifting device can lift the turbine shaft 10 upward, thereby facilitating the connection between the turbine shaft 10 and the generator shaft 1.

[0030] Please see Figure 1-5Working principle: When dismantling the axial flow propeller unit, the unit is first shut down and drained, and safety measures are taken; the unit is drained of oil, the tailrace platform is set up, and the oil receiver, collector ring shaft, oil jacket, upper operating oil pipe, upper frame, rotor upper baffle plate, rotor thrust head bolts, lower frame oil receiving box, water generator coupling protective cover, water guide bearing, main shaft seal and air are removed. The fixing pressure plate 25 is fitted on the outer circumference of the turbine shaft 10, and the shaft collar 24 is fitted inside the limiting groove. At the same time, the fixing flange 26 is installed on the top of the guide cone 13, so that the turbine shaft 10, runner 12, guide cone 13 and support cover 14 form a whole.

[0031] Then, remove the bolts between the generator shaft 1 and the rotor 11. At this time, all the weight on the generator shaft 1 is transferred to the load-bearing component. The rotor 11 is then lifted away. Next, remove the bolts on the first coupling flange 15 and the second coupling flange 151. The generator shaft 1 is then lifted away. Then, the crane can connect the turbine shaft 10, the runner 12, the guide cone 13 and the support cover 14 through the connecting hole 141 and the load-bearing component. The whole assembly is lifted out of the pit using a three-unit lifting method. At this time, the disassembly is completed.

[0032] After all equipment maintenance is completed, when reinstalling the axial flow propeller, firstly, the turbine shaft 10, runner 12, guide cone 13, and support cover 14 are hoisted back into the turbine pit using a triple-lift hoist system. Then, the generator shaft is reinstalled. The seal between the first coupling flange 15 and the second coupling flange 151 is made of fluororubber. Sixteen polytetrafluoroethylene (PTFE) plates are placed between the first coupling flange 15 and the second coupling flange 151 to prevent the generator shaft from pressing against the flange packing. Next, the mirror plate and thrust head are reinstalled, the rotor is lowered to the thrust bearing, and the rotor-thrust head bolts are installed to connect the rotor 11 and the generator shaft 1. At this point, a gap is left between the generator shaft 1 and the turbine shaft 10. The sixteen PTFE plates are then removed.

[0033] Next, the water-powered coupling tooling is used to pass the fastening bolt 23 through the first coupling flange 15 and the second coupling flange 151. Then, the fastening bolt 23 and the tooling block 21 are connected together with nuts. The screw jack 22 is installed on the end of the tooling block 21 facing the first coupling flange 15, and the lifting end of the screw jack 22 is connected to the second coupling flange 151. At this time, the fixing plate 25 is removed, enabling the turbine shaft 10 and the runner 12 to move upward. The turbine shaft 10 is slowly lifted upward by the screw jack 22. After the first coupling flange 15 and the second coupling flange 151 are properly fitted, the first coupling flange 15 and the second coupling flange 151 are connected together with bolts.

[0034] Finally, the load-bearing components were removed, and the water guide oil groove, collector ring shaft, oil sleeve, upper operating oil pipe, and upper frame were reinstalled in sequence; the unit was rotated and the shaft was adjusted after pushing the center; the clearance distribution of the lower guide bearing and water guide bearing was recalculated and adjusted; the oil receiver, rotor upper baffle plate, lower frame oil receiving box, first coupling flange 15 and second coupling flange 151 protective cover, main shaft seal and air shroud were reinstalled, and the unit was filled with oil; the unit's safety measures were lifted, water was added, and the unit was started for testing and the oil leakage of the first coupling flange 15 and second coupling flange 151 was checked.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A tooling for reassembling the water-generator coupling of an axial-flow propeller turbine unit, comprising: The generator shaft, turbine shaft, runner, and rotor are all present. The turbine shaft is mounted on top of the runner, the generator shaft is mounted on top of the turbine shaft, and the rotor is mounted on top of the generator shaft. The feature is that a guide cone is provided on the top of the runner, a support cover is installed on the top of the guide cone, a load-bearing component is installed on the outer circumference of the turbine shaft, the load-bearing component is connected to the guide cone, the load-bearing component is used to transfer the weight on the turbine shaft to the guide cone, and a connection hole is provided on the support cover.

2. The tooling for reassembling the hydro-generator coupling of an axial-flow propeller turbine unit according to claim 1, characterized in that: The generator shaft is provided with a first coupling flange at the bottom, the turbine shaft is provided with a second coupling flange at the top, and a lifting device is provided at the connection between the generator shaft and the turbine shaft.

3. The tooling for reassembling the hydro-generator coupling of an axial-flow propeller turbine unit according to claim 2, characterized in that: A gasket is provided at the end of the second coupling flange facing the first coupling flange.

4. The tooling for reassembling the hydro-generator coupling of an axial-flow propeller turbine unit according to claim 3, characterized in that: The lifting device includes a tooling block, a screw jack, and a fastening bolt. The fastening bolt passes through one end of the first coupling flange and the second coupling flange and is connected to the tooling block. The screw jack is installed on the end of the tooling block facing the first coupling flange, and the lifting end of the screw jack is connected to the second coupling flange.

5. The tooling for reassembling the hydro-generator coupling of an axial-flow propeller turbine unit according to claim 2, characterized in that: The sealing material between the first coupling flange and the second coupling flange is fluororubber.

6. A tooling for reassembling the hydro-generator coupling of an axial-flow propeller turbine unit according to any one of claims 1-4, characterized in that: The load-bearing component includes a fixed pressure plate, a fixed flange, and an annular fixed clamp. A shaft collar is installed on the outer circumferential surface of the turbine shaft. The fixed pressure plate is sleeved on the outer circumferential surface of the turbine shaft collar. A limit groove is opened inside the fixed pressure plate. The shaft collar is set inside the limit groove. The bottom of the fixed flange is connected to the guide cone.

7. The tooling for reassembling the hydro-generator coupling of an axial-flow propeller turbine unit according to claim 6, characterized in that: The shaft collar is an annular shaft collar, and an annular fixing block is installed at the bottom of the fixing plate. The annular fixing block is located inside the guide cone, and the shaft collar abuts against the top of the annular fixing block.

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