Torque transmission mechanism and wind driven generator

Abstract

The invention provides a torque transmission mechanism and a wind driven generator. The torque transmission mechanism comprises a rotating assembly, an expansion pin and an axial limiting structure, and a mounting hole is formed in the rotating assembly in a penetrating mode; the expansion pin is inserted into the mounting hole, and the expansion pin in the expansion state and the rotating assembly are in limiting fit in the circumferential direction of the expansion pin; an axial limiting structure is arranged between the rotating assembly and the expansion pin so as to limit the expansion pin in the expansion state and the rotating assembly in the axial direction of the expansion pin. According to the torque transmission mechanism, the expansion pin is adopted to replace an anti-shear pin to transmit torque, the expansion pin can be directly installed in the installation hole of the rotating assembly, hot assembly or cold assembly is not needed, assembly and disassembly are convenient, and reliable interference fit can be formed. Meanwhile, the torque transmission mechanism is provided with an axial limiting structure, and the rotating assembly can be prevented from being opened or separated under the action of bending moment.

Description

Technical Field

[0001] This invention relates to the field of wind power generation equipment technology, and in particular to a torque transmission mechanism and a wind turbine. Background Technology

[0002] As a core piece of equipment in the renewable energy sector, wind turbines' rotating components (such as high-speed couplings and low-speed main shafts) operate under conditions of alternating high torque and limited structural space. To ensure reliable torque transmission within the system, these components commonly employ shear pins (also known as shear pins or torque pins) as the primary torque transmission mechanism.

[0003] This type of torque transmission mechanism has many drawbacks. For example, the existing anti-shear pin and mounting flange usually use an interference or transition fit to achieve the contact stiffness and anti-slip capability required for high torque transmission. Therefore, in engineering, hot fitting (heating the flange or cooling the movable adjusting pin) or cold fitting (cold-shrinking the movable adjusting pin with liquid nitrogen) are commonly used for assembly, which results in complex assembly processes and high costs. Furthermore, when the wind turbine transmits high torque under rated or extreme operating conditions, the anti-shear pin is prone to plastic deformation or even micro-cracks. Once deformed and stuck, the anti-shear pin is difficult to disassemble, which greatly reduces the maintainability of the wind turbine. Summary of the Invention

[0004] The purpose of this invention is to provide a torque transmission mechanism and a wind turbine generator, aiming to solve the problems of many drawbacks of existing torque transmission mechanisms in wind turbine generators.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a torque transmission mechanism, comprising:

[0006] A rotating assembly having a through mounting hole;

[0007] An expansion pin is inserted into the mounting hole, and the expansion pin in the expanded state forms a limiting engagement with the rotating assembly in the circumferential direction of the expansion pin.

[0008] An axial limiting structure is provided between the rotating component and the expansion pin to limit the expansion pin and the rotating component in the axial direction of the expansion pin when they are in an expanded state.

[0009] In some embodiments, the expansion pin includes:

[0010] An expansion sleeve, wherein the expandable end of the expansion sleeve is inserted into the mounting hole;

[0011] A movable adjusting pin, one end of which can be movably and adjustably inserted into the end of the expansion sleeve located in the mounting hole along the axial direction of the expansion pin, and a first threaded hole is provided on the end face;

[0012] The first screw connector has its tail inserted into the end of the expansion sleeve away from the movable adjusting pin and is threadedly engaged with the first threaded hole.

[0013] In some embodiments, one end of the expansion sleeve located within the mounting hole is provided with an expansion slot extending axially along the expansion pin, the end of the expansion slot away from the first screw thread penetrating the expansion sleeve, and a plurality of expansion slots are provided at intervals along the circumference of the expansion sleeve.

[0014] In some embodiments, a guide hole is provided at one end of the expansion joint near the first screw connector to guide the expansion direction of the end of the expansion sleeve located in the mounting hole.

[0015] In some embodiments, an unloading groove is provided on the outer peripheral side of one end of the expansion sleeve located in the mounting hole. The unloading groove extends along the circumference of the expansion sleeve and is sequentially connected to a plurality of expansion joints.

[0016] In some embodiments, the guide hole is configured such that its circumferential dimension gradually increases and then gradually decreases from one end of the guide hole near the movable adjusting pin to the other end near the first screw.

[0017] In some embodiments, the rotating assembly includes a diaphragm assembly, a gasket, and a connecting flange arranged sequentially along the axial direction of the expansion pin, and the unloading groove is positioned near the connection between the gasket and the connecting flange.

[0018] In some embodiments, the movable adjusting pin includes a frustoconical section disposed at one end away from the first screw member and a cylindrical section disposed at one end close to the first screw member, wherein the frustoconical section is gradually reduced in size in the direction close to the first screw member.

[0019] The expansion sleeve includes an expansion section adapted to the shape of the frustum section and a guide section adapted to the shape of the cylindrical section. The expansion section and the frustum section slide in axial direction on the expansion pin so that the expansion section is driven to expand by the frustum section. The guide section is located on the side of the expansion section close to the first screw connector, and the guide section and the cylindrical section form a sliding guide engagement in axial direction on the expansion pin.

[0020] In some embodiments, the axial limiting structure includes a locking nut, one end of the expansion sleeve away from the movable adjusting pin is located outside the mounting hole and is provided with the locking nut, the locking nut abutting against the side of the rotating assembly near the first screwed member.

[0021] In some embodiments, a second threaded hole is provided on the end face of the movable adjusting pin away from the first threaded member. The axial limiting structure includes an end face pressure plate and a second threaded member. The end face pressure plate abuts against the side of the rotating assembly away from the first threaded member. The tail of the second threaded member passes through the end face pressure plate and is threaded into the second threaded hole. The head of the second threaded member abuts against the side of the end face pressure plate away from the rotating assembly.

[0022] In some embodiments, the locking nut is a super nut.

[0023] In some embodiments, a third threaded hole is provided through the end face plate, the third threaded hole being opposite to the rotating assembly in the axial direction of the expansion pin, and the third threaded hole being used for installing and removing screws.

[0024] To achieve the above objectives, the present invention also provides a wind turbine generator, including the torque transmission mechanism described above.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The torque transmission mechanism of this invention uses an expansion pin instead of a shear pin to transmit torque. The expansion pin can be directly installed into the mounting hole of the rotating component without the need for heat or cold fitting, which is convenient for installation and disassembly and forms a reliable interference fit. At the same time, the torque transmission mechanism is equipped with an axial limiting structure to prevent the rotating component from opening or separating under bending moment. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0028] Figure 1 This is a cross-sectional view of the torque transmission mechanism in an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A cross-sectional view of the torque transmission mechanism from another perspective;

[0030] Figure 3 for Figure 1 A magnified view of a section at point A in the middle;

[0031] Figure 4 for Figure 1 Schematic diagram of the expansion pin structure;

[0032] Figure 5 for Figure 4 Cross-sectional view of the expansion sleeve;

[0033] Figure 6 for Figure 4 A schematic diagram of the structure of the movable adjusting pin.

[0034] Explanation of reference numerals in the accompanying drawings of this invention:

[0035] Torque transmission mechanism 100, rotating component 1, mounting hole 11, diaphragm assembly 12, first diaphragm 121, second diaphragm 122, washer 13, connecting flange 14, abutting boss 141, expansion pin 2, expansion sleeve 21, expansion joint 211, guide hole 212, unloading groove 213, expansion section 214, guide section 215, movable adjusting pin 22, first threaded hole 221, frustum section 222, cylindrical section 223, second threaded hole 224, first threaded connector 23, axial limiting structure 3, first axial limiting structure 3a, second axial limiting structure 3b, locking nut 31, nut body 311, screw 312, end face pressure plate 32, third threaded hole 321, second threaded connector 33, disassembly threaded connector 34, washer 35.

[0036] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0039] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0040] This invention provides a torque transmission mechanism that can be used in scenarios with large torque transmission and limited structural space, such as high-speed couplings and low-speed main shafts of wind turbines. Figures 1 to 6 A preferred embodiment of the torque transmission mechanism provided by the present invention is shown.

[0041] Please see Figures 1 to 6 In some embodiments, the torque transmission mechanism 100 includes a rotating component 1, an expansion pin 2, and an axial limiting structure 3. The rotating component 1 has a through mounting hole 11. The expansion pin 2 is inserted into the mounting hole 11, and the expansion pin 2 in the expanded state forms a limiting fit with the rotating component 1 in the circumferential direction of the expansion pin 2. An axial limiting structure 3 is provided between the rotating component 1 and the expansion pin 2 to limit the expansion pin 2 in the expanded state and the rotating component 1 in the axial direction of the expansion pin 2.

[0042] Specifically, the torque transmission mechanism 100 is used in a wind turbine generator. A diaphragm coupling is usually installed between the gearbox and the generator of the wind turbine generator. The following will take the example of the torque transmission mechanism 100 being used in a diaphragm coupling installed between the gearbox and the generator.

[0043] The rotating assembly 1 is provided with mounting holes 11, which pass sequentially through each component of the rotating assembly 1 along the axial direction of the expansion pin 2. The specific arrangement of the rotating assembly 1 can be determined according to actual conditions; for example, the rotating assembly 1 typically includes a diaphragm assembly 12 and a connecting flange 14. Optionally, please refer to... Figures 1 to 6In some embodiments, the rotating assembly 1 includes a diaphragm assembly 12, a washer 13, and a connecting flange 14 arranged sequentially along the axial direction of the expansion pin 2. The diaphragm assembly 12 includes a first diaphragm 121 and a second diaphragm 122, with one end of the first diaphragm 121 connected to one end of the second diaphragm 122. The washer 13 is disposed between the connecting flange 14 and the connection between the first diaphragm 121 and the second diaphragm 122. The mounting hole 11 passes sequentially through the connection between the first diaphragm 121 and the second diaphragm 122, the washer 13, and the connecting flange 14 along the axial direction of the expansion pin 2. The inner holes of the diaphragm assembly 12, the washer 13, and the connecting flange 14 are joined together to form the mounting hole 11. The connecting flange 14 is typically a motor-side flange. The following description will take the rotating assembly 1, which includes a diaphragm assembly 12, a gasket 13, and a connecting flange 14, as an example. The axial direction of the expansion pin 2 is defined as front-to-back. The side of the gasket 13 closest to the diaphragm assembly 12 is the front side of the gasket 13, and the side of the gasket 13 closest to the connecting flange 14 is the rear side of the gasket 13.

[0044] The expansion pin 2 is inserted into the mounting hole 11, and the portion of the expansion pin 2 located in the mounting hole 11 is capable of expansion. When the expansion pin 2 is in the expanded state, it forms an interference fit with the mounting hole 11, enabling the expansion pin 2 to provide the high shear resistance required for the rotating assembly 1 to transmit torque. The expansion pin 2 can be directly installed into the mounting hole 11 of the rotating assembly 1 without the need for heat or cold fitting, which is both convenient for installation and removal and provides a reliable interference fit.

[0045] An axial limiting structure 3 is provided between the rotating component 1 and the expansion pin 2. The axial limiting structure 3 can provide axial tension between the various parts of the rotating component 1, thereby preventing the various parts of the rotating component 1 from opening or separating under bending moment.

[0046] The torque transmission mechanism 100 of the present invention uses an expansion pin 2 instead of a shear pin to transmit torque. The expansion pin 2 can be directly installed into the mounting hole 11 of the rotating component 1 without heat or cold fitting, which is convenient for installation and disassembly and can form a reliable interference fit. At the same time, the torque transmission mechanism 100 is provided with an axial limiting structure 3, which can prevent the rotating component 1 from opening or separating under bending moment.

[0047] The specific shape and style of the expansion pin 2 can be set according to the actual situation. Optionally, please refer to [link / reference needed]. Figures 1 to 6 In some embodiments, the expansion pin 2 includes an expansion sleeve 21 and a movable adjusting pin 22. The expansion sleeve 21 is inserted into the mounting hole 11 at one end, and the movable adjusting pin 22 is inserted into the end of the expansion sleeve 21 located in the mounting hole 11 along the axial direction of the expansion pin 2.

[0048] Specifically, the end of the expansion sleeve 21 inserted into the mounting hole 11 is the expansion end of the expansion sleeve 21. The expansion end of the expansion sleeve 21 can expand outward, and it can also contract inward after expansion. The expansion end of the expansion sleeve 21 can be the front end or the rear end. The following description will take the rear end of the expansion sleeve 21 as an example.

[0049] The rear end of the expansion sleeve 21 is inserted into the mounting hole 11 with its rear end facing rearward, and the front end of the movable adjusting pin 22 is inserted into the rear end of the expansion sleeve 21 with its front end facing forward. The movable adjusting pin 22 is positioned to move back and forth relative to the expansion sleeve 21. When the movable adjusting pin 22 is in the initial position, the expansion end of the expansion sleeve 21 is not expanded, and the expansion pin 22 is in the initial state. During the process of the movable adjusting pin 22 moving forward from the initial position to the expansion position, the movable adjusting pin 22 can drive the expansion end of the expansion sleeve 21 to gradually expand. When the movable adjusting pin 22 is in the expansion position, the expansion sleeve 21 expands to its maximum, and the expansion pin 22 is in the expanded state, forming an interference fit between the expansion sleeve 21 and the mounting hole 11.

[0050] Further, please refer to Figures 1 to 6 In some embodiments, one end of the movable adjusting pin 22 can be movably and adjustably inserted into one end of the expansion sleeve 21 located in the mounting hole 11 along the axial direction of the expansion pin 2, and a first threaded hole 221 is provided on the end face. The expansion pin 2 also includes a first screw connector 23, the tail of which is inserted into one end of the expansion sleeve 21 away from the movable adjusting pin 22 and is threadedly engaged with the first threaded hole 221.

[0051] Specifically, the front end face of the movable adjusting pin 22 is provided with a first threaded hole 221, and the first screw connector 23 can be a screw or bolt, etc. The tail end (i.e., the rear end of the first screw connector 23) is inserted rearward into the front end of the expansion sleeve 21, and the tail end of the first screw connector 23 forms a threaded engagement with the first threaded hole 221 on the movable adjusting pin 22. The head end of the first screw connector 23 abuts against the front side of the front end face of the expansion sleeve 21, and there is a clearance fit between the first screw connector 23 and the expansion sleeve 21, so that the first screw connector 23 is rotatable relative to the expansion sleeve 21 along a front-to-back upward axis. Thus, during the forward and reverse rotation of the first screw connector 23, the first screw connector 23 can drive the movable adjusting pin 22 to move back and forth relative to the expansion sleeve 21, so that the expansion end of the expansion sleeve 21 expands and the movable adjusting pin 22 is disengaged from the expansion sleeve 21. This method of adjusting the expansion pin 2 by driving the movable adjusting pin 22 through the first screw connector 23 makes the disassembly and assembly of the expansion pin 2 easier.

[0052] The expansion end of the expansion sleeve 21 is typically provided with an expansion slot 211 to allow the expansion end of the expansion sleeve 21 to expand. Optionally, please refer to Figures 1 to 6 In some embodiments, the expansion sleeve 21 is provided with an expansion slot 211 extending axially along the expansion pin 2 at one end located in the mounting hole 11. The end of the expansion slot 211 away from the first screw 23 passes through the expansion sleeve 21. Multiple expansion slots 211 are provided at intervals along the circumference of the expansion sleeve 21.

[0053] Specifically, the rear end of the expansion sleeve 21 is provided with an expansion slit 211 extending in the front-rear direction, and the rear end of the expansion slit 211 extends rearward through the rear end face of the expansion sleeve 21. The front end of the expansion slit 211 can be located inside the mounting hole 11; the front end of the expansion slit 211 can also extend forward beyond the rotating component 1. The following description will take the case where the front end of the expansion slit 211 is located inside the mounting hole 11 and the front end of the expansion slit 211 is close to the front end of the diaphragm assembly 12 as an example.

[0054] Expansion joints 211 are typically arranged in multiple evenly spaced intervals along the circumference of the expansion sleeve 21, so that the expansion end of the expansion sleeve 21 can expand and stretch evenly. The specific number of expansion joints 211 can be set according to the actual situation. For example, there can be two, three, four, five, six or more expansion joints 211. The following will be an example of four expansion joints 211 evenly spaced along the circumference of the expansion sleeve 21.

[0055] Further, please refer to Figures 1 to 6 In some embodiments, the expansion joint 211 is provided with a guide hole 212 at one end near the first screw connector 23, so as to guide the expansion direction of the end of the expansion sleeve 21 located in the mounting hole 11 through the guide hole 212.

[0056] Specifically, the front end of the expansion joint 211 is provided with a guide hole 212, and four expansion joints 211 are evenly opened around the circumference of the expansion joint 211. The end of each expansion joint 211 is provided with a guide hole 212. The guide hole 212 can guide the expansion direction of the expansion end of the expansion sleeve 21 to ensure that the expansion end of the expansion sleeve 21 can expand and open evenly, and avoid stress concentration problems.

[0057] The specific shape and style of the guide hole 212 are not particularly limited, as long as the guide hole 212 can guide the expansion direction of the expansion end of the expansion sleeve 21. Optionally, please refer to Figures 1 to 6 In some embodiments, the size of the guide hole 212 in the circumferential direction of the expansion sleeve 21 gradually increases and then gradually decreases from the end of the guide hole 212 near the movable adjusting pin 22 to the end near the first screw 23.

[0058] Specifically, the guide hole 212 is arranged such that its circumferential dimension gradually increases and then gradually decreases from back to front on the expansion sleeve 21. This arrangement of the guide hole 212 not only effectively guides the expansion direction but also effectively avoids stress concentration. For example, the guide hole 212 can be circular or elliptical in shape. Optionally, please refer to... Figures 1 to 6 In some embodiments, the guide hole 212 is a circular hole.

[0059] Optionally, please refer to Figures 1 to 6 In some embodiments, an unloading groove 213 is provided on the outer peripheral side of one end of the expansion sleeve 21 located in the mounting hole 11. The unloading groove 213 extends along the circumference of the expansion sleeve 21 and is connected to a plurality of expansion joints 211 in sequence.

[0060] Specifically, an annular unloading groove 213 is provided on the outer peripheral side of the expansion end of the expansion sleeve 21, and the unloading groove 213 is close to the stress concentration point of the rotating component 1 in the axial direction of the expansion pin 2. In this way, the unloading groove 213 is provided on the expansion end of the expansion sleeve 21 to avoid the problem of excessive stress concentration at the expansion end of the expansion sleeve 21 due to excessive shear force, thereby causing excessive local plastic deformation at the expansion end of the expansion sleeve 21.

[0061] The specific location of the unloading groove 213 on the expansion sleeve 21 can be set according to the actual situation. Optionally, please refer to [the relevant documentation]. Figures 1 to 6 In some embodiments, the unloading groove 213 is provided near the connection between the gasket 13 and the connecting flange 14.

[0062] Specifically, the connection between gasket 13 and connecting flange 14 is typically a stress concentration point for the rotating assembly 1. Therefore, by providing an unloading groove 213 on the expansion sleeve 21 corresponding to the connection between gasket 13 and connecting flange 14, excessive shear force can prevent stress concentration near the connection between gasket 13 and connecting flange 14, thus avoiding excessive local plastic deformation at the expansion end of the expansion sleeve 21. The unloading groove 213 near the connection between gasket 13 and connecting flange 14 can be located radially opposite the connection between the gasket 13 and connecting flange 14 to the groove opening of the unloading groove 213; alternatively, the connection between gasket 13 and connecting flange 14 can be located before or after the unloading groove 213.

[0063] The rear end of the expansion sleeve 21 and the front end of the movable adjusting pin 22 are typically connected by a pair of inner and outer conical surfaces, thereby enabling the movable adjusting pin 22 to drive the expansion sleeve 21 to expand. Optionally, please refer to... Figures 1 to 6In some embodiments, the movable adjusting pin 22 includes a frustoconical section 222 disposed at one end away from the first screw connector 23, the frustoconical section 222 being gradually smaller in the direction approaching the first screw connector 23; the expansion sleeve 21 includes an expansion section 214 adapted to the shape of the frustoconical section 222, the expansion section 214 and the frustoconical section 222 slidingly engaging in the axial direction of the expansion pin 2, so that the expansion section 214 is expanded by the frustoconical section 222.

[0064] Specifically, the front end of the movable adjusting pin 22 is provided with a frustoconical section 222, thereby forming an outer conical surface at the front end of the movable adjusting pin 22. The rear end of the expansion sleeve 21 is provided with an expansion section 214 (i.e., the part of the expansion sleeve 21 with an expansion slot 211), the shape of the expansion section 214 is adapted to the shape of the frustoconical section 222, thereby forming an inner conical surface at the rear end of the expansion sleeve 21 that connects with the outer conical surface. By tightening the first screw 23 with the applied axial force, the expansion sleeve 21 and the movable adjusting pin 22 are wedged together, so that the expansion section 214 of the expansion sleeve 21 expands within the inner hole (i.e., the mounting hole 11) of the diaphragm assembly 12, the washer 13 and the connecting flange 14, forming an interference fit, thereby achieving a larger torque transmission capacity.

[0065] Further, please refer to Figures 1 to 6 In some embodiments, the movable adjusting pin 22 further includes a cylindrical section 223 disposed at one end near the first screw member 23; the expansion sleeve 21 further includes a guide section 215 adapted to the shape of the cylindrical section 223, the guide section 215 being located on the side of the expansion section 214 near the first screw member 23, and the guide section 215 and the cylindrical section 223 forming a sliding guide engagement in the axial direction of the expansion pin 2.

[0066] Specifically, the front end of the movable adjusting pin 22 is provided with a cylindrical section 223, and the expansion sleeve 21 is provided with a guide section 215 located in front of the expansion section 214. The shape of the guide section 215 is adapted to the shape of the cylindrical section 223, and there is a small clearance fit between the guide section 215 and the cylindrical section 223. In this way, the sliding guide fit between the guide section 215 and the cylindrical section 223 in the front and back upward can ensure the concentricity of the expansion sleeve 21 and the movable adjusting pin 22 when the expansion pin 2 expands.

[0067] An axial limiting structure 3 is provided between the rotating component 1 and the expansion pin 2. The axial limiting structure 3 can be provided only between the front end of the expansion pin 2 and the rotating component 1. The axial limiting structure 3 provided between the front end of the expansion pin 2 and the rotating component 1 is defined as the first axial limiting structure 3a. Alternatively, the axial limiting structure 3 can be provided only between the rear end of the expansion pin 2 and the rotating component 1. The axial limiting structure 3 provided between the rear end of the expansion pin 2 and the rotating component 1 is defined as the second axial limiting structure 3b. Alternatively, the axial limiting structure 3 can be provided both between the front end of the expansion pin 2 and the rotating component 1 and between the rear end of the expansion pin 2 and the rotating component 1. That is, the torque transmission mechanism 100 is provided with the first axial limiting structure 3a and the second axial limiting structure 3b.

[0068] The specific configuration of the first axial limiting structure 3a and the second axial limiting structure 3b can be set according to the actual situation. Optionally, please refer to [link / reference needed]. Figures 1 to 6 In some embodiments, the axial limiting structure 3 includes a locking nut 31. The end of the expansion sleeve 21 away from the movable adjusting pin 22 is located outside the mounting hole 11 and is provided with a locking nut 31. The locking nut 31 abuts against the side of the rotating assembly 1 near the first screw connector 23.

[0069] Specifically, the first axial limiting structure 3a includes a locking nut 31. The front end of the expansion sleeve 21 extends forward beyond the rotating assembly 1, and the outer peripheral side of the front end of the expansion sleeve 21 is provided with external threads so that the locking nut 31 can be installed on the front end of the expansion sleeve 21. After tightening the first screw connector 23 to expand the expansion end of the expansion sleeve 21, the locking nut 31 on the expansion sleeve 21 is then tightened so that the locking nut 31 abuts against the front side of the front surface of the rotating assembly 1 (i.e., the front surface of the first diaphragm 121), so that the locking nut 31 can provide axial tension to the rotating assembly 1. A washer 35 may be provided between the locking nut 31 and the rotating assembly 1 so that the locking nut 31 abuts against the rotating assembly 1 through the washer 35.

[0070] Further, please refer to Figures 1 to 6 In some embodiments, the locking nut 31 is a super nut.

[0071] Specifically, the locking nut 31 includes a nut body 311 and a screw 312. The nut body 311 is mounted on the expansion sleeve 21. A threaded hole (not shown in the figure) is provided through the nut body 311 from front to back. Multiple threaded holes are spaced apart along the circumference of the nut body 311. A screw 312 is provided at each threaded hole, and the tail of the screw 312 abuts against the front surface of the first diaphragm 121. By designing the locking nut 31 as a super nut, the need for non-standard tools such as torque guns to disassemble and assemble the locking nut 31 is eliminated, thus simplifying the tools while achieving a larger axial preload.

[0072] Optionally, please refer to Figures 1 to 6 In some embodiments, the movable adjusting pin 22 is provided with a second threaded hole 224 on the end face away from the first screw connector 23. The axial limiting structure 3 includes an end face pressure plate 32 and a second screw connector 33. The end face pressure plate 32 abuts against the side of the rotating assembly 1 away from the first screw connector 23. The tail of the second screw connector 33 passes through the end face pressure plate 32 and is threaded into the second threaded hole 224. The head of the second screw connector 33 abuts against the side of the end face pressure plate 32 away from the rotating assembly 1.

[0073] Specifically, a second threaded hole 224 is provided on the rear end face of the movable adjusting pin 22, and the second axial limiting structure 3b includes an end face pressure plate 32 and a second threaded member 33. The end face pressure plate 32 abuts against the rear side of the rear surface of the rotating assembly 1 (i.e., the rear surface of the connecting flange 14). The second threaded member 33 can be a screw or bolt, etc. The tail of the second threaded member 33 passes forward through the end face pressure plate 32 and engages with the threaded second threaded member 33 on the movable adjusting pin 22. When the second threaded member 33 is tightened, the head of the second threaded member 33 abuts against the rear side of the end face pressure plate 32, so that the end face pressure plate 32 can press the rotating assembly 1, so that the second threaded member 33 and the end face pressure plate 32 can provide axial tension force on the rotating assembly 1.

[0074] Further, please refer to Figures 1 to 6 In some embodiments, an annular boss is provided on the surface of the end face pressure plate 32 near the rotating assembly 1, and the annular boss extends into the mounting hole 11.

[0075] Specifically, the front surface of the end face plate 32 has a forward-facing annular boss, the shape of which matches the shape of the mounting hole 11. The annular boss is inserted forward into the rear end of the mounting hole 11. In this way, the mounting and positioning between the end face plate 32 and the rotating assembly 1 can be achieved through the cooperation between the annular boss and the mounting hole 11.

[0076] The locking nut 31 is connected to the external thread of the expansion sleeve 21 to provide axial force to the rotating assembly 1. At the same time, the other end is connected to the second threaded hole 224 on the movable adjusting pin 22 by the end face pressure plate 32, the second screw connector 33, and provides axial force to the entire rotating assembly 1, preventing the rotating assembly 1 from axially disengaging.

[0077] Optionally, please refer to Figures 1 to 6 In some embodiments, a third threaded hole 321 is provided through the end face pressure plate 32. The third threaded hole 321 is opposite to the rotating component 1 in the axial direction of the expansion pin 2. The third threaded hole 321 is used for installing and removing the screw connector 34.

[0078] Specifically, the end face pressure plate 32 is provided with a third threaded hole 321 extending through the front and rear, or with multiple third threaded holes 321 arranged at intervals along the circumference of the expansion pin 2. For example, please refer to [link to relevant documentation]. Figures 1 to 6 In some embodiments, four third threaded holes 321 are evenly spaced along the circumference of the expansion pin 2 on the end face pressure plate 32.

[0079] Each third threaded hole 321 is equipped with a forward-facing disassembly screw 34, which can be a screw or bolt. When the movable adjusting pin 22 cannot be removed from the expansion sleeve 21 after the first screw 23 is removed, making disassembly of the expansion pin 2 difficult, especially when the expansion pin 2 undergoes significant plastic deformation and the movable adjusting pin 22 is stuck inside the expansion sleeve 21, the disassembly screw 34 can be used as a set screw. By tightening the disassembly screw 34, a torque is applied to hold the connecting flange 14, thereby pulling out the movable adjusting pin 22 and facilitating the disassembly of the entire expansion pin 2.

[0080] Further, please refer to Figures 1 to 6 In some embodiments, the connecting flange 14 has an abutment boss protruding on the surface near the end face pressure plate 32, which surrounds the mounting hole 11 and is used to abut against the tail of the disassembly screw 34.

[0081] The present invention also provides a wind turbine generator, which includes a torque transmission mechanism. Since the torque transmission mechanism adopts the technical solution of the above embodiments, it has the beneficial effects brought about by the technical solution of the above embodiments.

[0082] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A torque transmission mechanism, characterized in that, include: A rotating assembly having a through mounting hole; An expansion pin is inserted into the mounting hole, and the expansion pin in the expanded state forms a limiting engagement with the rotating assembly in the circumferential direction of the expansion pin. An axial limiting structure is provided between the rotating component and the expansion pin to limit the expansion pin and the rotating component in the axial direction of the expansion pin when they are in an expanded state.

2. The torque transmission mechanism according to claim 1, characterized in that, The expansion pin includes: An expansion sleeve, wherein the expandable end of the expansion sleeve is inserted into the mounting hole; A movable adjusting pin, one end of which can be movably and adjustably inserted into the end of the expansion sleeve located in the mounting hole along the axial direction of the expansion pin, and a first threaded hole is provided on the end face; The first screw connector has its tail inserted into the end of the expansion sleeve away from the movable adjusting pin and is threadedly engaged with the first threaded hole.

3. The torque transmission mechanism according to claim 2, characterized in that, The expansion sleeve has an expansion slot extending axially along the expansion pin at one end within the mounting hole. The end of the expansion slot away from the first threaded member penetrates the expansion sleeve. Multiple expansion slots are spaced apart along the circumference of the expansion sleeve. The expansion joint has a guide hole at one end near the first threaded member to guide the expansion direction of the end of the expansion sleeve located in the mounting hole; and / or, An unloading groove is provided on the outer peripheral side of one end of the expansion sleeve located in the mounting hole. The unloading groove extends along the circumference of the expansion sleeve and is sequentially connected to a plurality of expansion joints.

4. The torque transmission mechanism according to claim 3, characterized in that, From the end of the guide hole near the movable adjusting pin to the end near the first screw, the size of the guide hole in the circumferential direction of the expansion sleeve gradually increases and then gradually decreases.

5. The torque transmission mechanism according to claim 3, characterized in that, The rotating assembly includes a diaphragm assembly, a gasket, and a connecting flange arranged sequentially along the axial direction of the expansion pin, and the unloading groove is positioned near the connection between the gasket and the connecting flange.

6. The torque transmission mechanism according to claim 2, characterized in that, The movable adjusting pin includes a frustoconical section disposed at the end away from the first screw member and a cylindrical section disposed at the end close to the first screw member, wherein the frustoconical section is gradually reduced in size in the direction close to the first screw member. The expansion sleeve includes an expansion section adapted to the shape of the frustum section and a guide section adapted to the shape of the cylindrical section. The expansion section and the frustum section slide in axial direction on the expansion pin so that the expansion section is driven to expand by the frustum section. The guide section is located on the side of the expansion section close to the first screw connector, and the guide section and the cylindrical section form a sliding guide engagement in axial direction on the expansion pin.

7. The torque transmission mechanism according to claim 2, characterized in that, The axial limiting structure includes a locking nut, with one end of the expansion sleeve away from the movable adjusting pin located outside the mounting hole and fitted with the locking nut, the locking nut abutting against the side of the rotating assembly near the first threaded member; and / or, The movable adjusting pin has a second threaded hole on its end face away from the first threaded member. The axial limiting structure includes an end face pressure plate and a second threaded member. The end face pressure plate abuts against the side of the rotating assembly away from the first threaded member. The tail of the second threaded member passes through the end face pressure plate and is threaded into the second threaded hole. The head of the second threaded member abuts against the side of the end face pressure plate away from the rotating assembly.

8. The torque transmission mechanism according to claim 7, characterized in that, The locking nut is a super nut.

9. The torque transmission mechanism according to claim 7, characterized in that, A third threaded hole is provided through the end face pressure plate. The third threaded hole is opposite to the rotating assembly in the axial direction of the expansion pin. The third threaded hole is used to install and remove the screw-on parts.

10. A wind turbine generator, characterized in that, Includes the torque transmission mechanism as described in any one of claims 1-9.

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