Labor-saving disc turning device

Abstract

This invention relates to the field of wind turbine generator operation and maintenance technology, and in particular to a labor-saving turning device. The device includes: a turning wrench with a sleeve at its head adapted to a special bolt for high-speed shaft turning; a triangular support with a support assembly at its top; a support column passing through and slidably connected to the support assembly; a bracket fixedly mounted on the top of the support column, with a fulcrum pin on its side and movably connected to the handle of the turning wrench; a locking mechanism for locking or releasing the position of the support column relative to the support assembly; and a fixing device located at the bottom of the legs of the triangular support for fixing the turning device to the working plane. The turning wrench of this invention is adapted to a special bolt for high-speed shaft, and together with the triangular support, adjustable locking support column, and bracket, forms a lever system, reducing torque and saving labor. The fixing device prevents equipment displacement, eliminates the risk of slippage of the pry bar, and improves safety and convenience.

Description

Technical Field

[0001] This invention relates to the field of wind turbine operation and maintenance technology, and in particular to a labor-saving turning device. Background Technology

[0002] In the operation and maintenance of wind turbines, manual rotation is an essential step in tasks such as replacing rotor locks, aligning couplings, inspecting internal blades, or performing external repairs. Currently, the most common method is the traditional manual rotation method, which typically requires at least four maintenance personnel working together: one person climbs to the outside of the nacelle or the hub to observe the inspection holes, while the others use tools such as crowbars, extension rods, or wrenches inside the nacelle to manually rotate the high-speed shaft, thereby slowly rotating the rotor.

[0003] This traditional method has the following drawbacks: high labor costs and low efficiency; it is severely restricted by the environment and is difficult to operate in windless or lightly windy weather; it poses significant safety hazards and is prone to causing sprains, bumps, or risks associated with working at heights. Summary of the Invention The purpose of this invention is to provide a labor-saving turning device that can solve the above-mentioned technical problems.

[0004] This invention provides a labor-saving turning device, comprising: A turning wrench with a socket head that is compatible with the special bolts for turning high-speed shafts; A triangular support, with a support component at the top; A support column, which passes through and is slidably connected to the support assembly; A bracket is fixedly installed on the top of the support column, and a fulcrum pin is provided on its side and is movably connected to the handle of the turning wrench; A locking mechanism for locking or releasing the position of the support column relative to the support assembly; A fixing device is provided at the bottom of the support leg of the triangular support, and is used to fix the turning device on the working plane.

[0005] Preferably, the handle of the turning wrench includes a long strip-shaped front handle and a cylindrical rear handle, the front handle and the rear handle are fixedly connected, the rear handle includes an outer tube and an inner tube, the outer tube is machined with internal threads, the inner tube is machined with external threads, the two are connected by threaded engagement, so that the length of the turning wrench handle can be adjusted.

[0006] Preferably, the support assembly includes a support block, a through hole in the center of the support block, a hollow sleeve inside the through hole, and the support column located inside the sleeve and slidably connected thereto.

[0007] Preferably, the locking mechanism includes a handle bolt, and the side of the sleeve is provided with a threaded hole communicating with its internal space. The handle bolt is threadedly connected to the threaded hole and its end extends into the inside of the sleeve and abuts against the outer surface of the support column.

[0008] Preferably, the bracket includes a vertical plate, one end of the fulcrum pin is fixedly connected to the side of the plate, the outer surface of the other end is provided with an external thread and a limit cap is connected to the thread, and a through groove is provided on the front handle along its length direction, and the fulcrum pin is located in the through groove.

[0009] The socket of the turning wrench head is fixed to the turning wrench's special thread. During turning, the socket moves along an arc, and the handle of the turning wrench is also affected, experiencing a certain displacement along its length. At this time, the through groove in the handle will provide a certain amount of displacement, preventing the fulcrum pin from restricting the handle's movement. The limit cap is threaded to the fulcrum pin. After removing the limit cap, the entire turning wrench can be removed for easy transport and storage.

[0010] Preferably, the triangular support includes three legs, which are evenly distributed along the circumference and hinged to the support block at their top.

[0011] Preferably, the sleeve is located inside the through hole and is slidably connected to the through hole, and a limiting ring with a diameter larger than the through hole is fixedly sleeved on the top end of the sleeve; it also includes a folding rod, a fixing block is fixedly provided on the bottom of the sleeve, one end of the folding rod is hinged to the fixing block, and the other end is hinged to the middle of the foot tube.

[0012] The three legs can be folded inwards simultaneously around the hinge point with the support block. As they fold, the sleeves move upwards, reducing the footprint of the entire triangular support and making it easier to store and transport.

[0013] Preferably, the fixing device includes an electromagnet installed at the bottom of each leg tube for adsorbing onto a ferromagnetic base plate.

[0014] Preferably, the foot tube is made of aerospace-grade aluminum alloy.

[0015] Preferably, a permanent magnet is embedded in the bottom of the inner wall of the sleeve, which is used to attract the head of the high-speed shaft turning bolt to prevent the sleeve from coming out.

[0016] Beneficial effects: This invention, through the direct compatibility of a cranking wrench with a special bolt for high-speed shaft cranking, combined with a lever system formed by a triangular support, support column, and bracket, significantly reduces the torque required for manually rotating the high-speed shaft, greatly saving labor costs and improving work efficiency. The support column height is adjustable and lockable, adapting to different engine room heights and working angles, making operation flexible and efficient; the fixing device stabilizes the device on the working plane, preventing equipment displacement or tipping during operation, effectively preventing personnel sprains, bumps, and falls from heights; at the same time, it eliminates the safety hazards of crowbar slippage and tool slippage caused by personnel using crowbars in traditional methods, greatly improving the safety and convenience of operation and maintenance. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural schematic diagram of the present invention used to illustrate the positional relationship between the turning wrench and the turning bolt. Figure 3 This is a schematic diagram of the structure of the rotary wrench in this invention; Figure 4 This is a schematic diagram illustrating the connection between the rotary wrench and the upright plate in this invention; Figure 5 This is a schematic diagram illustrating the structure of the fulcrum pin and the limiting cap in this invention.

[0019] Explanation of reference numerals in the attached diagram: 1-Turning wrench, 101-Socket, 102-Front end handle, 103-Rear end handle, 1031-Outer tube, 1032-Inner tube, 2-Turning wrench bolt, 3-Support block, 301-Sleeve, 302-Limit ring, 4-Support column, 5-Upright plate, 6-Pivot pin, 601-Limit cap, 7-Through groove, 8-Handle bolt, 9-Feet tube, 10-Fixing block, 11-Folding rod. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example Please see Figures 1 to 5 This embodiment provides a labor-saving turning device, which is particularly suitable for high-speed shaft turning operation of wind turbine generator sets or other large rotating machinery.

[0024] The labor-saving turning device mainly includes: turning wrench, triangular support, support column, bracket, locking mechanism and fixing device.

[0025] The turning wrench 1 consists of a socket 101 at the head and a handle. The internal hexagonal profile of the socket 101 is adapted to the head shape of the special bolt 2 for high-speed shaft turning. To prevent the socket from accidentally dislodging from the bolt head during turning, a permanent magnet is embedded in the bottom of the inner wall of the socket 101. This permanent magnet can generate an attractive force on the special bolt head made of ferromagnetic material, maintaining a stable connection between the socket and the bolt. The handle is divided into a front handle 102 and a rear handle 103. The front handle 102 is elongated and has a through groove 7 along its length. The rear handle 103 is used by the operator to grip and apply force. It adopts a telescopic rod structure, including an outer tube 1031 and an inner tube 1032. The outer tube 1031 is machined with internal threads, and the inner tube 1032 is machined with external threads. The two are connected by threaded engagement. By rotating the inner tube 1032, the total length of the rear handle 103 can be changed, thereby adjusting the lever arm according to the actual working conditions to achieve the purpose of saving effort.

[0026] The triangular support provides stable ground support. It consists of three leg tubes 9, evenly distributed along the circumference, with their tops hinged to a support block 3 via hinge shafts. The support block 3 is roughly Y-shaped or triangular, with a vertical through hole in its center. A hollow sleeve 301 is installed inside the through hole, slidingly engaging with it, allowing the sleeve 301 to move up and down within the hole. A limiting ring 302 is fixedly fitted to the top of the sleeve 301, with a diameter larger than the through hole to prevent the sleeve 301 from completely slipping out. Each leg tube 9 is made of aerospace-grade aluminum alloy, ensuring strength while reducing weight. A folding rod 11 is also provided between the leg tube 9 and the sleeve 301: one end of the folding rod 11 is hinged to a fixing block 10 at the bottom of the sleeve 301, and the other end is hinged to the middle of the leg tube 9.

[0027] The support column 4 is a round rod with a diameter slightly smaller than the inner diameter of the sleeve 301. It passes through the sleeve 301 and can slide freely in the vertical direction inside the sleeve.

[0028] The bracket is fixedly mounted on the top of the support column 4. The bracket includes a vertical plate 5, and a fulcrum pin 6 is fixedly connected to the side of the plate 5. The end of the fulcrum pin 6 is machined with external threads and threadedly connected to a limit cap 601. The front handle 102 of the turning wrench 1 is sleeved on the fulcrum pin 6 through its through groove 7, and the limit cap 601 is used to prevent the front handle 102 from slipping off the fulcrum pin 6. The length of the through groove 7 is greater than the diameter of the fulcrum pin 6, allowing the handle to undergo relative displacement along its length during turning.

[0029] A locking mechanism is used to lock the position of the support column 4 relative to the sleeve 301. Specifically, a threaded hole communicating with the internal space is machined on the side wall of the sleeve 301, and a handle bolt 8 is threadedly connected to this threaded hole. Tightening the handle bolt 8 causes its end to extend into the sleeve 301 and press against the outer surface of the support column 4, thereby locking the position; loosening the handle bolt 8 releases the lock, allowing the support column 4 to slide freely. Alternatively, the locking mechanism can be a split clamping clamp, with the top of the sleeve or a suitable location designed as a two-part clamp. One side of the clamp is connected by a hinge, and the other side is equipped with a screw or quick clamp with a handle. Tightening the screw or pressing down the clamp retracts the clamp to clamp the support column. The large contact area between the clamp and the support column allows for better fixation of the support column. More preferably, the locking mechanism consists of a series of positioning holes (10-20mm apart) machined axially on the support column, and a spring-loaded positioning pin installed on the side of the sleeve. Pulling out the positioning pin and moving the support column up and down releases the pin, which then inserts into the nearest hole to lock.

[0030] A fixing device is located at the bottom of each leg tube 9. In this embodiment, the fixing device is an electromagnet, which is fixedly installed inside the bottom of the leg tube 9. When the turning device is placed on a ferromagnetic working surface (such as the steel plate of the wind turbine nacelle base), the electromagnet is energized to generate a strong magnetic attraction force, firmly adhering the entire device to the working surface. For non-ferromagnetic working surfaces, a base with suction cups or anchor bolts can also be used as an alternative.

[0031] Working and usage process: (1) Deployment and Fixation: In the initial state, the three legs 9 of the triangular support are folded inward. The operator first pulls the three legs 9 outward. During the deployment, the legs 9 rotate around their hinge point with the support block 3. At the same time, through the transmission of the folding rod 11, the sleeve 301 slides down along the through hole of the support block 3 until the limiting ring 302 contacts the upper surface of the support block 3. At this time, the three legs 9 are fully deployed to a stable working posture. Then, the entire device is moved to a suitable working surface near the high-speed shaft of the wind turbine generator. The power supply of the electromagnet is turned on, and the electromagnet generates magnetic force, which firmly attracts the bottom of the legs 9 to the steel working surface, thus completing the fixation of the device.

[0032] (2) Height Adjustment and Wrench Connection: Loosen the handle bolt 8 of the locking mechanism to allow the support column 4 to slide freely within the sleeve 301. Move the support column 4 up and down to change the height of the bracket and the turning wrench 1, so that the sleeve 101 is precisely aligned and fitted onto the head of the turning bolt 2. Since the sleeve 101 is equipped with a permanent magnet, when the sleeve 101 approaches the bolt head, the permanent magnet will automatically pull the bolt head into the bottom of the sleeve 101, ensuring reliable engagement between the two. After adjustment, tighten the handle bolt 8 to lock the support column 4 at the current height.

[0033] (3) Lever arm adjustment: The operator can adjust the length of the rear handle 103 of the turning wrench 1 according to their own strength or the required turning torque. Rotate the inner tube 1032 to extend or retract it from the outer tube 1031, thereby changing the total length of the handle. The longer the lever arm, the less effort is required for turning operation.

[0034] (4) Rotary operation: The operator holds the end of the rear handle 103 and applies a turning force in the tangential direction. At this time, the rotary wrench 1 rotates around the fulcrum pin 6, and the sleeve 101 drives the rotary bolt 2 to make an arc motion, thereby driving the high-speed shaft to rotate slowly. During the rotary operation, since the rotation center of the sleeve 101, i.e. the bolt center, does not coincide with the rotation center of the fulcrum pin 6, the wrench handle will also have a slight displacement in its length direction in addition to rotation. At this time, the through groove 7 on the front handle 102 slides relative to the fulcrum pin 6, allowing this displacement to be released naturally, avoiding jamming or additional stress caused by rigid connection. The operator can continuously apply force as needed to rotate the high-speed shaft to the required angle.

[0035] (5) Disassembly and Storage: After the turning operation is completed, first disconnect the power supply to the electromagnet. When the magnetic force disappears, the device can be easily removed from the working surface. If it is necessary to disassemble the turning wrench 1, unscrew the limit cap 601 and disengage the through slot 7 of the front handle 102 from the fulcrum pin 6 to remove the turning wrench 1. Then, release the locking mechanism and slide the support column 4 down to the lowest position. Finally, pull the sleeve 301 upward. The sleeve 301 moves upward and drives the three leg tubes 9 to fold inward around the hinge point synchronously through the folding rod 11. After folding, the footprint of the entire triangular support is significantly reduced. Put it into the storage box along with the removed turning wrench 1 for easy transportation and storage.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A labor-saving turning device, characterized in that, include: A turning wrench with a socket head that is compatible with the special bolts for turning high-speed shafts; A triangular support, with a support component at the top; A support column, which passes through and is slidably connected to the support assembly; A bracket is fixedly installed on the top of the support column, and a fulcrum pin is provided on its side and is movably connected to the handle of the turning wrench; A locking mechanism for locking or releasing the position of the support column relative to the support assembly; A fixing device is provided at the bottom of the support leg of the triangular support, and is used to fix the turning device on the working plane.

2. The labor-saving turning device according to claim 1, characterized in that, The handle of the turning wrench includes a long strip-shaped front handle and a cylindrical rear handle. The front handle and the rear handle are fixedly connected. The rear handle includes an outer tube and an inner tube. The outer tube is machined with internal threads, and the inner tube is machined with external threads. The two are connected by threaded engagement, so that the length of the turning wrench handle can be adjusted.

3. The labor-saving turning device according to claim 2, characterized in that, The support assembly includes a support block with a through hole in the middle and a hollow sleeve inside the through hole. The support column is located inside the sleeve and is slidably connected to it.

4. The labor-saving turning device according to claim 3, characterized in that, The locking mechanism includes a handle bolt, and the side of the sleeve is provided with a threaded hole communicating with its internal space. The handle bolt is threadedly connected to the threaded hole and its end extends into the inside of the sleeve and abuts against the outer surface of the support column.

5. The labor-saving turning device according to claim 3, characterized in that, The bracket includes a vertical plate. One end of the fulcrum pin is fixedly connected to the side of the plate, and the outer surface of the other end is provided with an external thread and a limit cap is connected to the thread. The front handle is provided with a through groove along its length, and the fulcrum pin is located in the through groove.

6. The labor-saving turning device according to claim 3, characterized in that, The triangular support includes three legs, which are evenly distributed along the circumference and hinged to the support block at their top.

7. The labor-saving turning device according to claim 6, characterized in that, The sleeve is located inside the through hole and is slidably connected to the through hole. A limiting ring with a diameter larger than the through hole is fixedly sleeved at the top of the sleeve. It also includes a folding rod. A fixing block is fixedly provided at the bottom of the sleeve. One end of the folding rod is hinged to the fixing block, and the other end is hinged to the middle of the foot tube.

8. The labor-saving turning device according to claim 1, characterized in that, The fixing device includes an electromagnet installed at the bottom of each leg tube for adhering to a ferromagnetic base plate.

9. The labor-saving turning device according to claim 6, characterized in that, The foot tubes are made of aerospace-grade aluminum alloy.

10. The labor-saving turning device according to claim 1, characterized in that, A permanent magnet is embedded in the bottom of the inner wall of the sleeve. The permanent magnet is used to attract the head of the special bolt for high-speed shaft turning machine to prevent the sleeve from coming out.

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