Water turbine crank arm disassembling device and method

Abstract

The invention discloses a water turbine crank arm disassembling device in the field of water turbine maintenance devices, and the water turbine crank arm disassembling device comprises a mounting shell which is in a round cake shape and is internally provided with a mounting cavity; the counter-force assembly is arranged in the mounting shell in a sliding mode, and the counter-force assembly is driven through the telescopic assembly, so that the counter-force assembly can stretch out or retract from the side wall of the mounting shell; the operation assembly is in transmission connection with the telescopic assembly and drives the telescopic assembly; the load assembly is fixedly arranged on the bottom surface of the mounting shell; the invention further discloses a disassembling method. The hydraulic turbine crank arm disassembling device has the beneficial effects that the telescopic assembly is arranged to achieve telescopic adjustment on the counter-force assembly, so that the disassembling device can adapt to disassembling of hydraulic turbine crank arms of various different sizes, the telescopic assembly is operated and driven through a worm and gear structure, the structure is simple, use is convenient, the self-locking function is achieved, and a locking mechanism does not need to be additionally arranged; according to the method, the disassembling efficiency is improved, the human input is reduced, the safety of operators is guaranteed, and potential safety hazards are reduced.

Description

Technical Field

[0001] This invention relates to the field of turbine maintenance devices, specifically to a turbine crank arm disassembly device and method. Background Technology

[0002] During the overhaul of a hydropower station unit, it was necessary to disassemble the guide vane mechanism. The clearance between the movable guide vane crank arm and the movable guide vane journal was very small, making it difficult to disassemble and lift the crank arm. The conventional device for disassembling the guide vane crank arm is a portal-shaped reaction frame. Jacks are then used inside the portal frame to push the reaction frame upwards, thereby disassembling the crank arm. This design is cumbersome and the operation method is labor-intensive.

[0003] The disadvantage of this dismantling device is that the tools are specialized. Due to the structural characteristics of water turbines, the structural dimensions of each water turbine are different. The dismantling process requires specialized tools, which requires separate design and manufacturing, optimization of the structure of specialized tools, or purchase of different models of reaction frames. When using them, it is necessary to select or manufacture suitable reaction frames, which is very troublesome. In addition, multiple reaction frames occupy storage space.

[0004] Therefore, we need to propose a device and method for dismantling the crank arm of a water turbine. Summary of the Invention

[0005] In order to address the above-mentioned shortcomings of the existing technology, improve maintenance efficiency, shorten the construction period, and increase labor efficiency, this invention provides a turbine crank arm disassembly device and method.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: A turbine crank arm disassembly device includes: a mounting housing, which is disc-shaped and has an internal mounting cavity; a reaction force assembly, which is slidably disposed within the mounting housing and is driven by a telescopic assembly, allowing the reaction force assembly to extend or retract from the side wall of the mounting housing; the reaction force assembly is used to engage with the turbine crank arm to pull and disassemble the crank arm; an operating assembly, which is connected to the telescopic assembly and drives the telescopic assembly; and a load assembly, which is fixedly disposed on the bottom surface of the mounting housing and applies a load to the disassembly of the turbine crank arm.

[0007] By setting up a telescopic component, the inner diameter of the reaction force component can be adjusted. The telescopic component can be driven by the operating component, thereby driving the reaction force component. In use, by adjusting the opening of the reaction force component, it can accommodate turbine crank arms of different sizes. When the reaction force component is engaged with the turbine crank arm, the load component can be activated to pull the turbine crank arm. One device can accommodate the disassembly of turbine crank arms of multiple sizes, which is convenient to use and makes storage and preservation after use simpler.

[0008] Further defining the mounting housing, it includes an upper housing and a lower housing. The side walls of the upper and lower housings are vertically provided with mounting holes for fixing. The upper and lower housings are fixed by being threadedly connected in the mounting holes with mounting bolts. By setting the mounting housing as an upper and lower housing, it is convenient to assemble and disassemble the device, and the fixing by mounting bolts is more stable.

[0009] Further defined, the reaction force assembly includes a reaction force horizontal bar, a reaction force vertical bar, and a fastening block; the reaction force vertical bar is fixedly connected to one end of the reaction force horizontal bar, the fastening block is fixedly connected to the inner side of the bottom end of the reaction force vertical bar, and a sliding groove that cooperates with the reaction force horizontal bar is provided on the side wall of the lower housing; the reaction force horizontal bar is slidably set in the sliding groove, and the sliding groove can realize a telescopic guide function.

[0010] Further defined, the telescopic assembly includes a turntable, telescopic guide grooves, and guide rods; the turntable is rotatably connected to the center of the bottom surface of the lower housing, and three telescopic guide grooves are evenly circumferentially opened on the turntable surface, with an angle between the direction of the telescopic guide grooves and the diameter direction of the turntable, and the guide rods are slidably connected in the telescopic guide grooves and fixedly connected to the top surface of the reaction crossbar.

[0011] The telescopic guide groove is set at an angle to the diameter direction of the turntable, and the telescopic guide groove is inclined from the inside to the outside. The guide rod is fixed on the top surface of the reaction crossbar. When the turntable rotates, it will drive the telescopic guide groove to move. The guide column cannot rotate in the circumferential direction. Therefore, the guide column will drive the reaction crossbar to extend and retract within the lower housing, realizing the extension and retraction drive of the reaction component. With three sets of telescopic components and three sets of reaction components, the three fulcrums are more stable than the existing gate-shaped disassembly tool.

[0012] Further defined, the operating components include worm gear teeth, worm, and fixed blocks; the worm gear teeth are located on the circumferential surface of the turntable, the worm meshes with the worm gear teeth on the circumferential surface of the turntable, and two fixed blocks are provided, fixedly located at intervals on the inner bottom surface of the lower housing, with both ends of the worm rotatably connected to the fixed blocks respectively, and one end passing through the fixed block and the side wall of the lower housing.

[0013] By setting the worm gear teeth on the circumference of the turntable, the turntable is used as the worm gear. Rotating the worm drives the turntable to rotate, thereby achieving the drive of the turntable. The structure is simple and easy to operate. In addition, the worm gear has a self-locking function and will not retract on its own.

[0014] Further specifying, the load assembly includes a hydraulic telescopic rod, with the piston end of the hydraulic telescopic rod facing downwards and the base end fixedly connected to the outer bottom surface of the lower housing. An abutment plate is fixedly provided on the piston end of the hydraulic telescopic rod. Providing an abutment plate at the end of the hydraulic telescopic rod allows for a larger contact area between the piston end and the end face of the turbine guide vane shaft, making it less prone to slippage.

[0015] Further, it also includes a protective component, which includes a ball bearing and a groove. The groove is correspondingly opened on the disc surface of the turntable and the inner top surface of the upper housing. The groove is an annular groove and is opened concentrically with the turntable. The groove is located inside the telescopic guide groove. The ball bearing is rotatably connected in the groove. In the installed state, the top and bottom of the ball bearing abut against the groove.

[0016] When the turbine crank arm is pulled out and disassembled, the outer end of the reaction crossbar will be subjected to a downward pulling force, and the inner end will exert an upward force on the turntable, affecting the rotational connection structure between the turntable and the lower shell. Therefore, a protective component is set up to connect the gap between the turntable and the upper shell through ball bearings and grooves, so that the turntable cannot move upward, thereby strengthening the stability of the turntable. The ball bearings and grooves will not affect the rotation of the turntable, and the opening of the grooves will not affect the telescopic guide groove, thus improving the service life of the device.

[0017] Further, two lifting rings are symmetrically fixed about the center on the outer top surface of the upper shell; the two lifting rings on the outer top surface of the upper shell facilitate the lifting and transportation of the disassembly device by lifting equipment, making it convenient to use.

[0018] Further, reinforcing ribs are provided at the bottom of the reaction crossbar and on the inner side of the reaction vertical bar, and a reinforcing groove that mates with the reinforcing ribs is provided on the inner bottom surface of the lower shell; the reinforcing ribs at the bottom of the reaction crossbar and on the inner side of the reaction vertical bar can enhance the strength of the reaction crossbar and the reaction vertical bar and improve the stability of the device.

[0019] A disassembly method, which disassembles the turbine crank arm using the aforementioned turbine crank arm disassembly device, includes the following steps: S1. The dismantling device is lifted to the top of the turbine crank arm to be dismantled using the lifting ring. The worm gear is rotated to drive the turntable to rotate, so that the reaction force assembly extends out of the mounting housing as a whole. S2. Lower the disassembly device so that the fastening block is located below the turbine crank arm to be disassembled. At this time, rotate the worm gear in the opposite direction to that in step S1, so that the turntable rotates in the opposite direction, driving the reaction force assembly to retract into the mounting housing until the inner side of the reaction force vertical rod contacts the turbine crank arm. S3. Reactivate the hydraulic telescopic rod to extend the piston rod until the contact plate contacts the top of the turbine's movable guide vane. At this point, the disassembly device is fixedly connected to the turbine crank arm. S4. Adjust the height of the hoisting device on the hoisting ring so that the hoisting rope is taut. At this time, start the hydraulic telescopic rod again. The piston of the hydraulic telescopic rod extends, causing the fastening block to pull the turbine crank arm off the turbine guide vane shaft. After the turbine crank arm is completely pulled out, use the hoisting device to place the disassembly device with the turbine crank arm attached on a flat surface. Then, rotate the worm gear in the same direction as in step S1 to make the reaction force assembly extend out of the mounting housing. Remove the turbine crank arm.

[0020] The beneficial effects of this invention are as follows: by setting a telescopic component to adjust the telescopic force component, the disassembly device can adapt to the disassembly of various sizes of turbine crank arms. The telescopic component is operated and driven by a worm gear structure, which is simple in structure, easy to use, and has a self-locking function, eliminating the need for an additional locking mechanism. This method improves disassembly efficiency, reduces manpower input, and ensures the safety of operators, reducing safety hazards. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure of the mounting housing of the present invention; Figure 2 Top view of the house with the upper shell removed; Figure 3 This is a simplified structural diagram of the reaction force component.

[0022] The symbols for each component are as follows: Mounting housing 1, upper housing 11, lower housing 12, sliding groove 121, reinforced sliding groove 122, mounting hole 13, mounting bolt 14, reaction force assembly 2, reaction force horizontal bar 21, reaction force vertical bar 22, fastening block 23, telescopic assembly 3, turntable 31, telescopic guide groove 32, guide rod 33, operating assembly 4, worm gear 41, worm 42, fixing block 43, operating disc 44, load assembly 5, abutment plate 51, protection assembly 6, ball bearing 61, roller groove 62, lifting ring 7. Detailed Implementation

[0023] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0024] Example: like Figures 1-3 As shown, a hydraulic turbine crank arm dismantling device includes a mounting housing 1, a reaction force assembly 2, a telescopic assembly 3, an operating assembly 4, a load assembly 5, and a protection assembly 6. The mounting housing 1 is disc-shaped with an internal mounting cavity. The mounting housing 1 includes an upper housing 11 and a lower housing 12. The side walls of the upper housing 11 and the lower housing 12 are vertically provided with mounting holes 13 for fixing. The upper housing 11 and the lower housing 12 are fixed in the mounting holes 13 by mounting bolts 14. Two lifting rings 7 are symmetrically fixed about the center on the outer top surface of the upper housing 11. The reaction force assembly 2 is driven by the telescopic assembly 3, allowing the reaction force assembly 2 to extend or retract from the side wall of the mounting housing 1. The reaction force assembly 2 is used to engage with the crank arm of the turbine to pull and disassemble the crank arm. The reaction force assembly 2 includes a reaction force horizontal bar 21, a reaction force vertical bar 22, and a fastening block 23. The reaction force vertical bar 22 is fixedly connected to one end of the reaction force horizontal bar 21, and the fastening block 23 is fixedly connected to the inner side of the bottom end of the reaction force vertical bar 22. A sliding groove 121 that mates with the reaction force horizontal bar 21 is provided on the side wall of the lower housing 12. Reinforcing ribs are provided at the bottom of the reaction force horizontal bar 21 and on the inner side of the reaction force vertical bar 22. A reinforcing sliding groove 122 that mates with the reinforcing ribs is provided on the inner bottom surface of the lower housing 12. The telescopic assembly 3 includes a turntable 31, a telescopic guide groove 32, and a guide rod 33. The turntable 31 is rotatably connected to the center of the bottom surface of the lower housing 12. The telescopic guide groove 32 has three grooves that are evenly circumferentially opened on the surface of the turntable 31. There is an angle between the direction of the telescopic guide groove 32 and the diameter direction of the turntable 31. The guide rod 33 is slidably connected in the telescopic guide groove 32 and fixedly connected to the top surface of the reaction crossbar 21. The operating component 4 is used to drive the telescopic component 3; the operating component 4 includes a worm gear 41, a worm 42, and a fixing block 43; the worm gear 41 is located on the circumferential surface of the turntable 31, the worm 42 meshes with the worm gear 41 on the circumferential surface of the turntable 31, two fixing blocks 43 are provided and fixedly located on the inner bottom surface of the lower housing 12 at intervals, the two ends of the worm 42 are rotatably connected to the fixing block 43 respectively, and one end passes through the fixing block 43 and the side wall of the lower housing 12, and the protruding end of the worm 42 is fixedly connected to the operating disc 44; The load assembly 5 is used to apply load to the disassembly of the turbine crank arm. The load assembly 5 includes a hydraulic telescopic rod with the piston end facing downward and the base end fixedly connected to the outer bottom surface of the lower housing 12. An abutment plate 51 is fixedly provided on the piston end of the hydraulic telescopic rod. The protective component 6 includes a ball bearing 61 and a groove 62. The groove 62 is correspondingly opened on the disc surface of the turntable 31 and the inner top surface of the upper housing 11. The groove 62 is an annular groove and is concentrically opened with the turntable 31. The groove 62 is located inside the telescopic guide groove 32. The ball bearing 61 is rotatably connected in the groove 62. In the installed state, the top and bottom of the ball bearing 61 abut against the groove 62.

[0025] By setting the telescopic component 3, the inner diameter of the reaction component 2 can be adjusted. The telescopic component 3 can be driven by the operating component 4, thereby driving the reaction component 2. In use, by adjusting the opening of the reaction component 2, it can accommodate turbine crank arms of different sizes. When the reaction component 2 is engaged with the turbine crank arm, activating the load component 5 can pull the turbine crank arm. One device can accommodate the disassembly of turbine crank arms of multiple sizes, making it convenient to use and easier to store after use. The mounting housing 1 is designed with an upper housing 11 and a lower housing 12 for easy assembly and disassembly of the device, and is further secured with mounting bolts 14 for added stability. The reaction component horizontal... Rod 21 is slidably disposed within sliding groove 121, which serves as a telescopic guide. Telescopic guide groove 32 is angled to the diameter of turntable 31 and is inclined outwards. Guide rod 33 is fixed to the top surface of reaction crossbar 21. When turntable 31 rotates, it moves telescopic guide groove 32. Since the guide post cannot rotate circumferentially, it drives the reaction crossbar 21 to extend and retract within the lower housing 12, thus driving the extension and retraction of reaction assembly 2. With three sets of telescopic assemblies 3 and three sets of reaction assembly 2, the three fulcrums provide greater stability compared to existing gate-shaped disassembly tools. The structure is simple and easy to operate. The worm gear 41 is positioned on the circumference of the turntable 31, making the turntable 31 the worm wheel. Rotating the worm 42 drives the turntable 31 to rotate, thus achieving the drive of the turntable 31. Furthermore, the worm gear 42 has a self-locking function and will not retract on its own. A contact plate 51 is provided at the end of the hydraulic telescopic rod to increase the contact area between the piston end and the end face of the turbine guide vane shaft, making slippage less likely. When the turbine crank arm is pulled out and disassembled, the outer end of the reaction crossbar 21 will be subjected to a downward pulling force, and the inner end will exert an upward force on the turntable 31, affecting the rotational connection structure between the turntable 31 and the lower housing 12. Therefore, a contact plate 51 is provided. The protective component 6 connects the gap between the turntable 31 and the upper housing 11 through the ball bearings 61 and the groove 62, preventing the turntable 31 from moving upward, thus strengthening the stability of the turntable 31. The ball bearings 61 and the groove 62 do not affect the rotation of the turntable 31, and the opening of the groove 62 does not affect the telescopic guide groove 32, thus improving the service life of the device. Two lifting rings 7 are set on the outer top surface of the upper housing 11 to facilitate the lifting and transportation of the disassembly device by lifting equipment, making it convenient to use. Reinforcing ribs are set at the bottom of the reaction crossbar 21 and the inner side of the reaction vertical bar 22 to enhance the strength of the reaction crossbar 21 and the reaction vertical bar 22, thereby improving the stability of the device.

[0026] A disassembly method, which disassembles the turbine crank arm using the aforementioned turbine crank arm disassembly device, includes the following steps: S1. The dismantling device is hoisted to the top of the turbine crank arm to be dismantled by the hoisting ring 7, and the worm gear 42 is rotated to drive the turntable 31 to rotate, so that the reaction force component 2 extends out of the mounting housing 1 as a whole; S2. Lower the disassembly device so that the fastening block 23 is located below the turbine crank arm to be disassembled. At this time, rotate the worm gear 42 in the opposite direction to that in step S1, so that the turntable 31 rotates in the opposite direction, driving the reaction force assembly 2 to retract into the mounting housing 1 until the inner side of the reaction force vertical rod 22 contacts the turbine crank arm. S3. Reactivate the hydraulic telescopic rod to extend the piston rod until the contact plate 51 contacts the top of the turbine's movable guide vane. At this time, the disassembly device is fixedly connected to the turbine crank arm. S4. Adjust the height of the hoisting device on the hoisting ring 7 so that the hoisting rope is taut. At this time, start the hydraulic telescopic rod again. The piston of the hydraulic telescopic rod extends, so that the fastening block 23 pulls the turbine crank arm off the turbine guide vane shaft. After the turbine crank arm is completely pulled out, use the hoisting device to place the disassembly device with the turbine crank arm on the plane. Rotate the worm gear 42 in the same direction as in step S1 again so that the reaction force component 2 extends out of the mounting housing 1. Then remove the turbine crank arm.

Claims

1. A device for disassembling a water turbine crank, characterized in that, The utility model relates to a water turbine crank arm disassembling device, including: Install shell (1), be internally provided with installation cavity for round cake, Reaction force subassembly (2) are slidably arranged in install shell (1), through telescopic subassembly (3) to reaction force subassembly (2) is driven, make reaction force subassembly (2) can from the lateral wall of install shell (1) stretch out or retract, reaction force subassembly (2) are used for clamping in water turbine crank arm place to realize the pullout disassembly of crank arm, Operating subassembly (4) are drivingly connected with telescopic subassembly (3), and operating subassembly (4) are driven, Load subassembly (5) are fixedly arranged in the bottom surface of install shell (1), and load subassembly (5) are used for the load of the disassembly of water turbine crank arm.

2. The hydro-turbine arm disassembly device of claim 1, wherein, Install shell (1) includes upper shell (11) and lower shell (12), and the lateral wall of upper shell (11) and lower shell (12) is vertically provided with the installation hole (13) for fixedly connected, and upper shell (11) and lower shell (12) are fixedly connected in installation hole (13) through installation bolt (14) and are realized fixedly connected.

3. The hydro-turbine arm disassembly device of claim 2, wherein, Reaction force subassembly (2) include reaction force cross bar (21), reaction force vertical bar (22) and buckling block (23), reaction force vertical bar (22) is fixedly connected in one end of reaction force cross bar (21), and buckling block (23) is fixedly connected in the inner side of the bottom end of reaction force vertical bar (22), and the lateral wall of lower shell (12) is provided with the sliding groove (121) matched with reaction force cross bar (21).

4. The hydro-turbine arm disassembly device of claim 3, wherein, Telescopic subassembly (3) include rotating disc (31), telescopic guide slot (32) and guide rod (33), rotating disc (31) is rotatably connected in the center of the bottom surface of lower shell (12), and telescopic guide slot (32) are provided with three, and are evenly annularly provided on the disc surface of rotating disc (31), and the direction between telescopic guide slot (32) and the diameter direction of rotating disc (31) exists the angle, and guide rod (33) are slidably connected in telescopic guide slot (32) and are fixedly connected in the top surface of reaction force cross bar (21).

5. The hydro-turbine arm disassembly device of claim 4, wherein, Operating subassembly (4) worm gear (41), worm and fixed block (43), worm gear (41) are arranged on the peripheral surface of rotating disc (31), worm is engaged with worm gear (41) on the peripheral surface of rotating disc (31), and fixed block (43) are provided with two, and are fixedly arranged on the inner bottom surface of lower shell (12), and the both ends of worm are rotatably connected on fixed block (43) respectively, and one end passes through fixed block (43) and the lateral wall of lower shell (12).

6. The hydro-turbine arm disassembly device of claim 5, wherein, Load subassembly (5) include hydraulic telescopic rod, and the piston end of hydraulic telescopic rod is downward, and the base end is fixedly connected on the outer bottom surface of lower shell (12), and the piston end head of hydraulic telescopic rod is fixedly provided with abutment plate (51).

7. The hydro-turbine arm disassembly device of claim 6, wherein, Further comprising a protection assembly (6) including a ball (61) and a rolling groove (62) which is correspondingly arranged on the disc surface of the rotating disc (31) and the inner top surface of the upper shell (11), the rolling groove (62) is an annular groove and concentrically arranged with the rotating disc (31), the rolling groove (62) is arranged on the inner side of the telescopic guide groove (32), the ball (61) is rolling connected in the rolling groove (62), and the top and bottom of the ball (61) are abutted with the rolling groove (62) in the installed state of the upper shell (11) and the lower shell (12).

8. The hydro-turbine arm disassembly device of claim 7, wherein, Two lifting rings (7) are symmetrically and fixedly arranged on the outer top surface of the upper shell (11) with respect to the center.

9. The hydro-turbine arm disassembly device of claim 3, wherein, The bottom of the counterforce cross rod (21) and the inner side of the counterforce vertical rod (22) are provided with reinforcing ribs, and the inner bottom surface of the lower shell (12) is provided with a reinforcing sliding groove (122) matched with the reinforcing ribs.

10. A method of disassembling a water turbine crank by the water turbine crank disassembling apparatus according to claim 9, characterized by, The method comprises the following steps: S1. The disassembling device is hoisted to the upper side of the water turbine crank by the lifting ring (7), the worm drives the rotating disc (31) to rotate, so that the counterforce assembly (2) is extended out of the installation shell (1) as a whole; S2. The disassembling device is lowered so that the buckling block (23) is located below the water turbine crank to be disassembled, at this time, the worm is rotated in the opposite direction to that in step S1, so that the rotating disc (31) is reversely rotated to drive the counterforce assembly (2) to retract into the installation shell (1) as a whole, until the inner side of the counterforce vertical rod (22) is in contact with the water turbine crank; S3. The hydraulic telescopic rod is started again, so that the piston rod is extended until the abutting plate (51) is in contact with the top of the water turbine movable vane, at this time, the disassembling device is fixedly connected to the water turbine crank; S4. The height of the hoisting device on the lifting ring (7) is adjusted, so that the lifting rope is in a straight state, at this time, the hydraulic telescopic rod is started again, the piston of the hydraulic telescopic rod is extended, so that the buckling block (23) pulls out the water turbine crank from the water turbine vane shaft, after the water turbine crank is completely pulled out, the disassembling device with the water turbine crank is placed on a plane by the hoisting device, and the worm is rotated in the same direction as in step S1 to extend the counterforce assembly (2) out of the installation shell (1) as a whole, so that the water turbine crank can be removed.

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