Wind turbine generator system yaw device

Abstract

The present application relates to wind turbine, provide a kind of wind turbine disc device, including support frame (5);Driving mechanism (3), the driving mechanism (3) is provided with driving gear (301);Mounting disc (4), the mounting disc (4) is detachably mounted on the support frame (5);Adapter disc (1), the adapter disc (1) is used to detachably connect the brake disc of wind turbine, the adapter disc (1) is formed with inner ring gear (101), the adapter disc (1) is separately provided with the support frame (5);Wherein, the mounting disc (4) is formed with positioning installation structure, the driving mechanism (3) is detachably installed on the mounting disc (4) by positioning installation structure, to make the driving gear (301) with the inner ring gear (101) meshing connection.The present application wind turbine disc device does not need to disassemble the top cover of wind turbine nacelle, can be hoisted into nacelle and is installed blade, save time and effort.

Description

Technical Field

[0001] This invention relates to wind turbine generator sets, and more specifically, to a turning gear device for wind turbine generator sets. Background Technology

[0002] There are generally two common methods for installing wind turbine blades during the hoisting process of wind turbine generator sets. One method is to assemble the hub and blades as a whole on the ground and then use a crane to lift the rotor and install it together with the main shaft. The other method is to install the hub and main shaft as a whole and then use a turning device to install one blade at a time in the same position to complete the aerial assembly and installation of three blades in succession.

[0003] Existing turning devices are divided into hydraulic turning devices and electric turning devices, but both are large in size and weight. When using the second blade installation method mentioned above, it is necessary to remove the top cover of the wind turbine nacelle and use a crane to lift the turning device and pump station from the top cover into the nacelle for installation. After the turning is completed, the blades are installed, and finally the top cover of the nacelle is reinstalled. The entire disassembly and assembly process is time-consuming and labor-intensive. In addition, accessories installed on the top cover of the nacelle, such as water cooling system, automatic fire protection system, audio and video system, and vibration monitoring system, also need to be disassembled and assembled, which has a certain impact on the reliability of the components. At the same time, the work is complicated and time is wasted. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a wind turbine generator turning device, which can be hoisted into the nacelle for blade installation without disassembling the top cover of the wind turbine generator nacelle, saving time and effort.

[0005] To solve the above-mentioned technical problems, the present invention provides a turning gear for a wind turbine generator set, comprising:

[0006] Support frame;

[0007] A drive mechanism, wherein the drive mechanism is provided with a drive gear;

[0008] Mounting plate, which is detachably mounted on the support frame;

[0009] The adapter plate is used to detachably connect the brake disc of the wind turbine generator set. The adapter plate has an internal gear ring and is separately disposed from the support frame.

[0010] The mounting plate has a positioning mounting structure, and the drive mechanism is detachably mounted on the mounting plate through the positioning mounting structure so that the drive gear meshes with the internal gear ring.

[0011] In some specific embodiments, the adapter plate is provided with a first circular sleeve and a second circular sleeve on both sides along the axial direction, the inner diameter of the first circular sleeve is set to correspond to the outer diameter of the brake disc, so that the first circular sleeve is fitted onto the brake disc, the inner ring of the second circular sleeve forms the internal gear ring, and the adapter plate is provided with a plurality of adapter mounting holes for the connector to pass through and connect to the brake disc.

[0012] In some specific embodiments, the drive mechanism includes a drive motor and a reducer, the input end of the reducer is connected to the output end of the drive motor, the output end of the reducer is connected to the drive gear, the positioning and mounting mechanism includes a flange structure formed on the mounting plate and a mounting flange, the reducer is connected to the flange structure through the mounting flange, and the drive gear passes through the central hole of the flange structure and meshes with the internal gear ring.

[0013] In some specific embodiments, the mounting flange is an eccentric flange.

[0014] In some specific embodiments, the drive motor is equipped with an electromagnetic brake.

[0015] In some specific embodiments, multiple drive mechanisms are provided, and the multiple drive mechanisms are evenly arranged along the circumference of the mounting plate.

[0016] In some specific embodiments, reaction arm support rods are hinged to both sides of the support frame, and the end of the reaction arm support rod away from the support frame is used to connect to the internal lifting lug of the wind turbine generator set.

[0017] In some specific embodiments, the reaction arm support rod is a telescopic rod.

[0018] In some specific embodiments, at least two positioning shafts are also included. The positioning shafts are used for positioning between the adapter plate and the mounting plate. Each positioning shaft includes a positioning part and a limiting ring part connected in sequence. The diameter of the limiting ring part is larger than the diameter of the positioning part. The mounting plate has a positioning stepped hole, and the adapter plate has a transition positioning hole. The positioning shaft is slidably installed in the positioning stepped hole along the axial direction. When the end face of the limiting ring part abuts against the stepped surface of the positioning stepped hole, the positioning part extends out of the positioning stepped hole to be able to cooperate with the transition positioning hole for positioning. The end of the limiting ring part away from the positioning part extends out of the positioning stepped hole to be able to cooperate with the support positioning hole on the support frame for positioning.

[0019] In some specific embodiments, a fixing plate is slidably fitted on the second positioning part. When the end face of the limiting part abuts against the step surface of the positioning step hole, a locking member is provided between the limiting part and the step surface to restrict the axial degree of freedom of the limiting part.

[0020] The positioning shaft can move axially away from the mounting plate to disengage the positioning part from the adapter positioning hole, and a locking element is provided between the limiting ring and the support frame.

[0021] The beneficial effects of the present invention through the above solution are as follows:

[0022] The wind turbine turning gear of this invention uses a drive gear and an internal gear ring to mesh and connect, which allows the adapter plate and support frame used to connect the brake disc to be set separately. The drive mechanism and the mounting plate can be detached and installed on the support frame. Therefore, the various parts of the turning gear can be disassembled to form smaller and lighter components. There is no need to disassemble the nacelle top cover. The components can be installed into the nacelle through the lifting hole by a small crane inside the nacelle for assembly, in order to cooperate with the single blade lifting and assembly.

[0023] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of a specific embodiment of the wind turbine generator turning device of the present invention;

[0026] Figure 2 This is an exploded view of a specific embodiment of the wind turbine generator turning device of the present invention, excluding the control cabinet.

[0027] Figure 3 It is a three-dimensional adapter plate. Figure 1 ;

[0028] Figure 4 It is a three-dimensional adapter plate. Figure 2 ;

[0029] Figure 5 It is a three-dimensional diagram of the shear pin;

[0030] Figure 6 This is a front view of the shear pin;

[0031] Figure 7 It is a 3D view of the drive mechanism;

[0032] Figure 8 This is a front view of the installation disk;

[0033] Figure 9 This is the rear view of the installation disk;

[0034] Figure 10 yes Figure 9 Enlarged view of point A in the middle;

[0035] Figure 11 It is a 3D diagram of the support frame;

[0036] Figure 12 This is a front view of the support frame;

[0037] Figure 13 This is the rear view of the support frame;

[0038] Figure 14 yes Figure 13 Enlarged view at point B in the middle;

[0039] Figure 15 It is a 3D view of the reaction arm support rod in its fully retracted state;

[0040] Figure 16 It is a 3D view of the reaction arm support rod in an extended state;

[0041] Figure 17 It is a 3D diagram of a gear encoder;

[0042] Figure 18 It is a 3D view of the positioning axis;

[0043] Figure 19 This is a schematic diagram of the structure in which the positioning shaft is fixed on the mounting plate 4;

[0044] Figure 20 This is a schematic diagram of the structure where the positioning shaft is fixed on the support frame 5.

[0045] Explanation of reference numerals in the attached figures

[0046] 1. Adapter plate; 101. Internal gear ring; 102. First circular sleeve; 103. Second circular sleeve; 104. Adapter mounting hole; 105. Adapter positioning hole; 2. Anti-shear pin; 3. Drive mechanism; 301. Drive gear; 302. Drive motor; 303. Reducer; 304. Mounting flange; 305. Electromagnetic brake; 4. Mounting plate; 401. Flange structure; 401-1. Center hole; 401-2. Flange mounting hole; 402. Semi-circular U-groove; 403. Weight reduction through hole; 404. Positioning pin; 5. Step hole; 5. Support frame; 501. Vertical support; 502. Bottom support; 503. Triangular rib plate; 504. Connecting lug; 505. Support positioning hole; 506. Operating hole; 6. Reaction arm support rod; 601. First telescopic part; 602. Middle part; 603. Second telescopic part; 604. U-shaped connecting socket; 7. Gear encoder; 8. Control cabinet; 9. Positioning shaft; 901. Positioning part; 902. Limiting ring part; 903. Locking mounting hole; 904. Operating part; 10. Locking bolt. Detailed Implementation

[0047] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention, and the scope of protection of the present invention is not limited to the specific embodiments described below.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "forming," "having," "setting," and "connecting," etc., should be interpreted broadly. For example, a connection can be a direct connection or an indirect connection through an intermediate medium; it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate connector; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] In this invention, unless otherwise specified, the directional terms "up," "down," "left," "right," "counterclockwise," etc., used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. The directional terms of this invention should be understood in conjunction with the actual installation state.

[0050] Existing turning gear devices are bulky. During blade installation, the top cover of the wind turbine nacelle needs to be disassembled to hoist the turning gear into the nacelle. After the blades are assembled, the top cover needs to be reinstalled. The entire disassembly and reassembly process is time-consuming and labor-intensive. Furthermore, accessories installed on the nacelle top cover, such as water cooling systems, automatic fire suppression systems, audio-visual systems, and vibration monitoring systems, also require disassembly and reassembly, which can affect the reliability of components. This process is also complex and time-consuming. While the wind turbine nacelle itself has a hoisting hole for easy access, existing turning gear devices cannot be hoisted into the nacelle through this hole. Therefore, this invention provides a wind turbine turning gear device. (See attached image) Figure 1-20 The turning device includes a transfer plate 1, a mounting plate 4, a drive mechanism 3, and a support frame 5. The drive mechanism 3 is provided with a drive gear 301. The mounting plate 4 is detachably mounted on the support frame 5. The transfer plate 1 is used to detachably connect to the brake disc of the wind turbine generator set, and the transfer plate 1 forms an internal gear ring 101. The mounting plate 4 forms a positioning mounting mechanism. The drive mechanism 3 is detachably mounted on the mounting plate 4 through the positioning mounting mechanism, so that the drive gear 301 meshes with the internal gear ring 101. Thus, the transfer plate 1 and the support frame 5 can be set separately. Since the drive mechanism and the mounting plate 4 are both detachably mounted, the various components of the turning device of the present invention can be disassembled to form smaller and lighter parts, which can be easily lifted into the nacelle through the lifting hole by a small crane in the nacelle for assembly, in conjunction with blade lifting and assembly, without the need to disassemble the nacelle top cover, saving time and effort.

[0051] As one specific implementation of adapter plate 1, see Figure 2-4 The adapter plate 1 is provided with a first circular sleeve 102 and a second circular sleeve 103 on both sides along the axial direction. The inner diameter of the first circular sleeve 102 corresponds to the outer diameter of the brake disc so that the first circular sleeve 102 is fitted onto the brake disc. In a preferred case, the inner diameter of the first circular sleeve 102 is slightly larger than the outer diameter of the brake disc, so that the two are in clearance fit. This improves the ease of assembly and also allows for positioning through the cooperation of the first circular sleeve 102 and the brake disc. The adapter plate 1 is provided with a number of adapter mounting holes 104 for connecting parts to pass through and be fastened to the brake disc. The inner ring of the second circular sleeve 103 is formed on the adapter plate 1 to form an internal gear ring 101. The internal gear ring 101 meshes with the drive gear 301 of the drive mechanism 3 to drive the brake disc to rotate the main shaft to the blade mounting position.

[0052] It should be noted that, in order to accurately determine the required rotation angle of the adapter plate 1, in a preferred case, a marking line can be set on the outer periphery of the adapter plate 1. Taking the installation of three blades as an example, the marking lines can be evenly distributed at 120° on the outer periphery of the adapter plate 1. The relative rotation angle between the adapter plate 1 and the mounting plate 4 can be determined by the marking lines, so as to determine the blade installation position.

[0053] Furthermore, a gear encoder 7 can also be installed on the mounting plate 1, see [reference]. Figure 17 The gear encoder 7 is specifically a photoelectric signal gear encoder. The internal gear ring 101 of the adapter plate 1 will be driven, and the protruding teeth of the internal gear ring 101 will contact the photoelectric element of the sensor of the gear encoder 7 to generate light signals and pulse signals to record the rotation angle. It can be used in conjunction with the above-mentioned marking line scale position to achieve more accurate blade angle positioning.

[0054] As a specific embodiment of the drive mechanism 3, referring to 7-9, the drive mechanism 3 includes a drive motor 302 and a reducer 303. The reducer 303 is preferably a three-stage planetary gear reducer, thus enabling a large output torque. The input end of the reducer 303 is connected to the output end of the drive motor 302, and the output end of the reducer 303 is connected to the drive gear 301. The positioning and mounting mechanism includes a flange structure 401 formed on the mounting plate 4 and a mounting flange 304. The reducer 303 is connected to the flange structure 401 via the mounting flange 304. The drive gear 301 passes through the central hole 401-1 of the flange structure 401 and meshes with the internal gear ring 101, and is fixedly connected by bolts through the mounting flange 304 and the flange mounting hole 401-2. It should be noted that the mounting plate 4 can have a hollow design to further reduce its weight without affecting the structural strength. For example, see [reference needed]. Figure 8 and Figure 9 The mounting plate 4 has a semi-circular U-shaped groove 402 located at the periphery edge and a weight-reducing through hole 403 located in the middle.

[0055] As a preferred embodiment of the mounting flange 304, the mounting flange 304 is an eccentric flange with an eccentricity that can be set to 2.5 mm, thereby adjusting the meshing clearance between the drive gear 301 and the internal gear ring 101 to achieve the accuracy of meshing transmission.

[0056] During the installation of the blades, the installed blades will be affected by the wind and the weight of the blades themselves is also relatively large, so the reaction force on the brake disc is relatively large. In order to prevent the drive motor 10 from rotating under the action of external force when it is stationary, in a preferred case, an electromagnetic brake 305 is provided on the drive motor 302.

[0057] When the drive mechanism 3 drives the brake disc to rotate, it requires a large driving force. Therefore, the corresponding drive motor 302 has a larger power, which also increases the overall size of the drive mechanism 3. To reduce the size and weight of the drive mechanism 3, see [reference needed]. Figure 2 Multiple drive mechanisms 3 can be provided. The maximum driving force that a single drive mechanism 3 can provide is relatively small. However, by working together, multiple drive mechanisms 3 can meet the driving force required during the blade installation and rotation process. This also reduces the size and weight of a single drive mechanism 3, making it easier to hoist. In the preferred case, multiple drive mechanisms 3 are evenly arranged along the circumference of the mounting plate 4, so that the driving force of the drive mechanism 3 on the adapter plate 1 is evenly distributed during the driving process.

[0058] See Figure 11-14 The support frame 5 can be formed by welding high-rigidity steel sections to serve as the overall structural support. While possessing high structural strength, it also results in a relatively light overall weight. Specifically, the support frame 5 is formed by welding an upright support 501 and a bottom support 502, which together form an inverted "T" shape. A triangular rib plate 503 is provided between the upright support 501 and the bottom support 502 to enhance structural strength. During assembly, the mounting plate 4 can be mounted on the support frame 5 via shear pins 2. The flange structure 401 on the mounting plate 4 is arranged to correspond to the gaps between the steel sections, allowing the drive mechanism 3 to pass through these gaps and be mounted on the mounting plate 4. The drive gear 301 can pass through the central hole 401-1 and mesh with the internal gear ring 101.

[0059] During blade installation, angular rotation causes the brake disc to generate a reaction force on the turning gear, which may lead to the entire turning gear overturning. As a preferred embodiment of the present invention, see [link to previous section]. Figure 11 The support frame 5 has connecting lugs 504 on both sides, and each connecting lug 504 is hinged with a reaction arm support rod 6. The end of the reaction arm support rod 6 away from the support frame 5 is used to connect to the nacelle lifting lug of the wind turbine generator set, so that the support frame 5 can be fixed to the lifting lug inside the nacelle by the reaction arm support rods 6 on both sides, thus preventing the support frame 5 from overturning.

[0060] As a preferred embodiment of the reaction arm support rod 6, see [link to relevant documentation]. Figure 15 and Figure 16The reaction arm support rod 6 is a telescopic rod, which includes a first telescopic part 601, a middle part 602, and a second telescopic part 603 connected in sequence. Both ends of the first telescopic part 601 and the second telescopic part 603 are provided with U-shaped connecting holes 604, which are used to hinge the connecting lug 504 and the internal lifting lug, respectively. The axial ends of the middle part 602 form a first threaded rod 602-1 and a second threaded rod 602-2 with opposite directions of rotation. The first telescopic part 601 has an internal thread that mates with the first threaded rod 602-1. The second telescopic part 603 has an internal thread that mates with the second threaded rod 602-2. This allows the first telescopic part 601 and the second telescopic part 603 to move axially closer to or further away from the middle part 602 by rotating the middle part 602 counterclockwise or clockwise. This adjusts the overall length of the reaction arm support rod 6, improving installation convenience. It also allows for adjusting the tightness between the support frame 5 and the cabin lifting lugs, ensuring that the support frame 5 does not wobble during operation, improving rotation accuracy, and ensuring the precision of the blade installation position.

[0061] It should be noted that a large torque is generated during the rotation of the blades. To ensure the stable operation and service life of the turning device of the present invention, the connecting parts between the adapter plate 1 and the brake disc, the connecting parts between the mounting plate 4 and the support frame 5, and the connecting parts at both ends of the reaction arm support rod 6 can preferably be shear pins 2. See [reference needed]. Figure 5 and Figure 6 The shear pin 2 is preferably made of 42CrMoA high-strength and hardness material and is used in conjunction with bolt assemblies to achieve a fixed connection between the components.

[0062] During assembly, it is necessary to ensure the precise assembly positions of the various components of the wind turbine generator turning device of the present invention. Preferably, see [reference needed]. Figure 2 , Figure 3 , Figure 8-1418-20, the present invention also includes at least two positioning shafts 9, which are used for positioning between the adapter plate 1 and the mounting plate 4. Each positioning shaft 9 includes a positioning part 901 and a limiting ring part 902 connected in sequence. The diameter of the limiting ring part 902 is larger than the diameter of the positioning part 901. The mounting plate 4 has a positioning stepped hole 404, and the adapter plate 1 has an adapter positioning hole 105. The diameter of the adapter positioning hole 105 and the small hole diameter of the positioning stepped hole 404 are both matched with the diameter of the positioning part 901. When the large hole diameter of the positioning step hole 404 is equal to or greater than the diameter of the limiting ring portion 902, the positioning shaft 9 is slidably installed in the positioning step hole 404 along the axial direction. With the end face of the limiting ring portion 902 abutting against the stepped surface of the positioning step hole 404, the positioning portion 901 extends out of the positioning step hole 404. At this time, the axial position between the adapter plate 1 and the mounting plate 4 can be positioned by the cooperation of the positioning portion 901 and the transition positioning hole 105. This is achieved through the cooperation of at least two positioning shafts 9. The radial positioning between the positioning adapter plate 1 and the mounting plate 4 is achieved. When the positioning part 901 abuts against the bottom of the adapter positioning hole 105, the axial distance between the adapter plate 1 and the mounting plate 4 is exactly the design distance, so as to facilitate the relative rotation of the adapter plate 1 relative to the mounting plate 4. In addition, when the limiting ring part 902 abuts against the stepped surface of the positioning step hole 404, the end of the limiting ring part 902 away from the positioning part 901 extends out of the positioning step hole 404, and the support frame 5 is formed with a corresponding support positioning hole 505 provided by the limiting ring part 902. The diameter of the support positioning hole 505 matches the diameter of the limiting ring part 902, so that the position between the mounting plate 4 and the support frame 5 is positioned under the action of at least two positioning shafts 9, thereby fixing the support frame 5. After the mounting plate 4 is fixed on the support frame 5 and the assembly is completed, the positioning shaft 9 is moved axially away from the adapter plate 1 to avoid affecting the subsequent relative rotation of the adapter plate 1 and the mounting plate 4.

[0063] In a preferred embodiment of positioning the positioning shaft 9, when the end face of the limiting ring 902 abuts against the stepped surface of the positioning step hole 404, a locking member is provided between the limiting ring 902 and the stepped surface. This locking member fixes the limiting ring 902 within the positioning step hole 404, restricting the axial freedom of the limiting ring 902 and preventing wobbling during the positioning of the adapter plate 1, mounting plate 4, and support frame 5. This locking member is detachable, allowing it to be removed after positioning, enabling the positioning shaft 9 to move axially away from the mounting plate 4, thus disengaging the positioning part 901 from the adapter positioning hole 105. The positioning part 901 does not affect the relative rotation between the adapter plate 1 and the mounting plate 4. Furthermore, a locking member is provided between the limiting ring 902 and the support frame 5 to fix the positioning shaft 9 onto the support frame 5. Figure 18-20For example, the locking component mentioned above is a locking bolt 10. The limiting ring 902 is provided with four locking mounting holes 903. One pair of locking mounting holes 903 are arranged horizontally, and a corresponding threaded hole is formed on the limiting ring 902. The horizontally arranged locking mounting holes 903 are through holes, and the locking bolt 10 passes through the through hole and is threadedly connected to the threaded hole. The other pair of locking mounting holes 903 are arranged vertically. When the positioning shaft 9 moves away from the adapter plate 1 along the axial direction and abuts against the support frame 5, a through hole corresponding to the horizontally arranged locking mounting holes 903 is formed on the corresponding part of the support frame 5. The horizontally arranged locking mounting holes 903 are threaded holes, and the locking bolt 10 can pass through the through hole and be threadedly connected to the horizontally arranged locking mounting holes 903. In order to facilitate the disassembly of the locking bolt 10 used to connect the limiting ring 903 and the positioning step hole 404, as shown in the figure, a horizontally extending operating hole 506 is formed on the support frame 5. In addition, the positioning shaft 9 also includes an operating part 904, which is connected to one end of the limiting ring part 902, and see [reference needed]. Figure 19 and Figure 20 The end of the operating part 904 away from the limiting ring part 902 always extends out of the operating hole 506, so that the operator can pull the positioning shaft 9 along the axis through the operating part 904.

[0064] It should be noted that the wind turbine generator turning device of the present invention also includes a control cabinet 8. The control cabinet 8 realizes the forward rotation, reverse rotation, emergency stop and angle positioning functions of the turning device, and is preferably a wireless control cabinet with a wireless remote control so as to enable remote operation and reduce the constraints of wiring harness layout.

[0065] It should also be noted that when the control cabinet 8 controls the drive mechanism 3 to rotate the blade angle, the output power of the servo motor 302 is adjusted according to the torque acting on the adapter plate 1. Since the present invention has multiple drive mechanisms 3, different ranges can be set to control the number of drive mechanisms 3 in operation. For example, if there are four drive mechanisms 3, four torque ranges can be set. In the first torque range, only one drive mechanism 3 is controlled to operate; when the torque increases to the second torque range, two drive mechanisms 3 are controlled to operate, preferably two drive mechanisms arranged symmetrically; when the torque increases to the third torque range, three drive mechanisms 3 are controlled to operate; and when the torque increases to the fourth torque range, four drive mechanisms 3 are controlled to operate. This allows the rotation angle to be controlled by a small number of drive mechanisms 3 when the torque is low, ensuring rotation angle accuracy while also reducing energy consumption. The above torque ranges should be set according to the model of the driver motor 302. In addition, the external environment may affect the accuracy of rotation. For example, when there is a strong wind, the torque transmitted to the adapter plate 1 by the blade under the action of the wind may be unstable or too large. In this case, it is not suitable for blade installation. When the torque sensor converts the torque into an electrical signal and transmits it to the control cabinet 8, the control cabinet 8 analyzes and determines that it is under this condition, and can control the electromagnetic brake 305 to start and stop the turning operation.

[0066] The wind turbine turning device of this invention adopts a modular, split design, allowing each component to be disassembled into smaller, lighter parts. It eliminates the need to disassemble the nacelle top cover and can be assembled by using a small crane inside the nacelle through the lifting port, facilitating single-blade lifting and assembly. To better understand the technical solution of this invention, the following description, in conjunction with the aforementioned preferred technical features, is provided. (See attached image.) Figure 1-20 The installation process is as follows:

[0067] First, the components of the wind turbine generator turning device of the present invention are separately hoisted into the nacelle through the hoisting holes of the nacelle; the first circular wall sleeve 102 of the adapter plate 1 is fitted onto the brake disc, so that the adapter mounting hole 104 and the reserved hole on the brake disc are connected and installed through the anti-shear pin 2, and the zero degree scale position on the adapter plate 1 needs to be aligned with one of the installation positions of the three blades, so as to complete the connection and installation of the adapter plate 1.

[0068] Insert the positioning shaft 9 into the positioning step hole 404, and hold the end face of the limiting ring 902 against the step surface of the positioning step hole 404, and lock it with the locking bolt 10. At this time, the positioning part 901 extends out from the positioning step hole 404 and inserts the extended shaft into the adapter positioning hole 105 on the adapter plate 1. With the cooperation of the four positioning shafts 9, the radial positioning between the adapter plate 1 and the mounting plate 4 is achieved, and the end of the positioning part 901 is held against the bottom of the adapter positioning hole 105 to complete the axial positioning between the two, so that the axial distance between the adapter plate 1 and the mounting plate 4 is the design value, which facilitates the subsequent relative rotation between the adapter plate 1 and the mounting plate 4.

[0069] After the adapter plate 1 and the mounting plate 4 are positioned, the support positioning hole 505 on the support frame 5 cooperates with the shaft part of the positioning step hole 404 of the limiting ring 902, and the support frame 5 is attached to the mounting plate 4 to achieve the positioning between the support frame 5 and the mounting plate 4, thereby realizing the positional relationship between the adapter plate 1, the mounting plate 4 and the support frame 5.

[0070] After the support frame 5 is positioned, both ends of the reaction arm support rod 6 are hinged to the connecting lug 504 and the cabin lifting lug respectively via shear pins 2. The reaction arm support rod 6 is a telescopic rod; by rotating the middle part 602, the telescopic length of the reaction arm support rod 6 is adjusted, thereby adjusting the fastening effect between the support frame 5 and the cabin lifting lug, ensuring that the support frame 5 does not wobble. Then, the mounting plate 4 is fixed to the support frame 5 via the shear pins 2. Since the adapter plate 1, mounting plate 4, and support frame 5 are all fixed, their positions are related... All parts are in the designed position. At this time, the locking bolts 10 on the step surface of the positioning step hole 404 and the limiting ring 902 are removed through the operating hole 506 on the support frame 5. Then, the positioning shaft 9 is pulled out axially away from the adapter plate 1 through the operating part 904 so that the positioning part 901 is disengaged from the adapter positioning hole 105 to avoid interfering with the relative rotation between the adapter plate 1 and the mounting plate 4. The positioning shaft 9 is then fixed on the support frame 5 through the locking bolts 10 to ensure that no shaking occurs during the subsequent blade rotation.

[0071] The four drive mechanisms 3 are mounted on the flange structure 401 at the corresponding position on the mounting plate 4 via the mounting flange 304 (eccentric flange), and the meshing clearance between the drive gear 301 and the internal gear ring 101 is adjusted to ensure the accuracy of the meshing transmission.

[0072] After installation, power on and wire the circuit for testing, and start the control cabinet 8 to calibrate the zero position so that the first blade is installed in a horizontal position. Remove the maintenance key of the control cabinet 8 to lock it, and then hoist and assemble the first blade. Then, rotate the control cabinet 8 120° in sequence to make the second and third blades installed in a horizontal position. Remove the maintenance key of the control cabinet 8 to lock it, and then hoist and assemble the second and third blades.

[0073] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0074] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0075] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A turning gear for a wind turbine generator set, characterized in that, include: Support frame (5); The drive mechanism (3) is provided with a drive gear (301). Mounting plate (4), which is detachably mounted on the support frame (5); The adapter plate (1) is used to detachably connect the brake disc of the wind turbine generator set. The adapter plate (1) has an internal gear ring (101). The adapter plate (1) and the support frame (5) are separately set. The mounting plate (4) has a positioning mounting structure, and the drive mechanism (3) is detachably mounted on the mounting plate (4) through the positioning mounting structure so that the drive gear (301) meshes with the internal gear ring (101). It also includes at least two positioning shafts (9), which are used for positioning between the adapter plate (1) and the mounting plate (4). The positioning shaft (9) includes a positioning part (901), a limiting ring part (902), and an operating part (904) connected in sequence. The diameter of the limiting ring part (902) is larger than the diameter of the positioning part (901). The mounting plate (4) has a positioning step hole (404), and the adapter plate (1) has an adapter positioning hole (105). The positioning shaft (9) is slidably installed in the positioning step hole (404) along the axial direction, and abuts against the positioning part (105) at the end face of the limiting ring part (902). In the case of the stepped surface of the stepped hole (404), the positioning part (901) extends out from the positioning stepped hole (404) to be able to cooperate with the transition positioning hole (105) for positioning. The end of the limiting ring part (902) away from the positioning part (901) extends out of the positioning stepped hole (404) to be able to cooperate with the support positioning hole (505) on the support frame (5) for positioning. The end of the operating part (904) away from the limiting ring part (902) always extends out of the operating hole (506) on the support frame (5) to be suitable for the operator to pull the positioning shaft (9) along the axis through the operating part (904).

2. The wind turbine generator turning device according to claim 1, characterized in that, The adapter plate (1) is provided with a first circular sleeve (102) and a second circular sleeve (103) on both sides along the axial direction. The inner diameter of the first circular sleeve (102) corresponds to the outer diameter of the brake disc, so that the first circular sleeve (102) is fitted onto the brake disc. The inner ring of the second circular sleeve (103) forms the internal gear ring (101). The adapter plate (1) is provided with a plurality of adapter mounting holes (104) for connecting parts to pass through and connect to the brake disc.

3. The wind turbine generator turning device according to claim 1, characterized in that, The drive mechanism (3) includes a drive motor (302) and a reducer (303). The input end of the reducer (303) is connected to the output end of the drive motor (302). The output end of the reducer (303) is connected to the drive gear (301). The positioning and mounting mechanism includes a flange structure (401) and a mounting flange (304) formed on the mounting plate (4). The reducer (303) is connected to the flange structure (401) through the mounting flange (304). The drive gear (301) passes through the center hole (401-1) of the flange structure (401) and meshes with the internal gear ring (101).

4. The wind turbine generator turning device according to claim 3, characterized in that, The mounting flange (304) is an eccentric flange.

5. The wind turbine generator turning device according to claim 3, characterized in that, An electromagnetic brake (305) is provided on the drive motor (302).

6. The wind turbine generator turning device according to claim 1, characterized in that, The drive mechanism (3) is provided in multiple ways, and the multiple drive mechanisms (3) are evenly arranged along the circumference of the mounting plate (4).

7. The wind turbine generator turning device according to claim 1, characterized in that, Both sides of the support frame (5) are hinged with reaction arm support rods (6), and the end of the reaction arm support rod (6) away from the support frame (5) is used to connect the internal lifting lug of the wind turbine generator set.

8. The wind turbine generator turning device according to claim 7, characterized in that, The reaction arm support rod (6) is a telescopic rod.

9. The turning gear device for a wind turbine generator set according to claim 1, characterized in that, When the end face of the limiting ring (902) abuts against the step surface of the positioning step hole (404), a locking member is provided between the limiting ring (902) and the step surface to restrict the axial degree of freedom of the limiting ring (902); The positioning shaft (9) can move axially away from the mounting plate (4) so ​​that the positioning part (901) disengages from the adapter positioning hole (105), and a locking element is provided between the limiting ring part (902) and the support frame (5).

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