Method for adjusting the meshing of a yaw gear of a wind turbine generator set

Abstract

The application relates to a yaw gear engagement adjustment method of a wind turbine, which comprises the following steps: measuring the engagement area and the gear gap between a yaw input gear and a driven gear; according to the engagement area and the gear gap, calculating the adjustment range of the axis rotation and the adjustment range of the axis movement of the yaw input gear; installing the inclined washer on the mounting surface of the frame; moving the mounting axis of the yaw input gear by rotating the flange plate; locking the bolt on the frame; and detecting the yaw input gear and the driven gear again. The yaw gear engagement adjustment method of the wind turbine can realize the rotation adjustment of the axis direction of the yaw input gear by adjusting and installing the inclined washer at different positions, can realize the movement adjustment of the axis direction of the yaw input gear by rotating the flange plate of the yaw input gear, and can greatly reduce the trial installation times and improve the maintenance efficiency by the cooperation of the two directions.

Description

Technical Field

[0001] This invention relates to the field of wind turbine generator sets, and more specifically to a method for adjusting the meshing of yaw gears in wind turbine generator sets. Background Technology

[0002] The yaw system is the "rudder" of a horizontal axis wind turbine. Its core function is to keep the nacelle and rotor facing the wind direction at all times, maximize wind capture, and achieve braking, cable release, and safety protection.

[0003] The gear meshing quality of the yaw system in a wind turbine generator directly affects the equipment's operational stability and service life. Currently, when adjusting the meshing area and backlash of the yaw drive gear in the field, ordinary flat copper shims are typically used. This method has significant drawbacks, including the following:

[0004] First, it is impossible to accurately correct the "tilt angle" of the yaw input gear (drive gear) relative to the driven gear (large gear ring), making it difficult to adjust the meshing area (especially in the tooth length direction), and the adjustment effect depends entirely on the operator's experience. Second, when adjusting the meshing area, the tooth backlash will inevitably change, and it is difficult to achieve coordinated and precise control of these two key parameters using flat shims. Third, the adjustment often requires multiple trial installations, disassembly and replacement of shims of different thicknesses, and repeated measurements, which is time-consuming and labor-intensive. Fourth, if multiple flat shims are used in combination to obtain a specific thickness during the adjustment process, it is easy to cause unstable installation, stress concentration, or even interference with the frame.

[0005] Therefore, in order to solve the above problems, a method for adjusting the yaw gear meshing of wind turbine generator sets is needed. Summary of the Invention

[0006] The yaw gear meshing adjustment method of the wind turbine generator set of the present invention can realize the rotational adjustment of the yaw input gear axis by adjusting the installation of the inclined washer at different positions, and realize the movement adjustment of the yaw input gear axis by adjusting the flange of the yaw input gear. The coordinated operation of the two directions greatly reduces the number of trial installations and improves maintenance efficiency.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0008] A method for adjusting the yaw gear meshing of a wind turbine generator set includes the following steps:

[0009] S1: Measure the meshing area and backlash between the yaw input gear and the driven gear at the end of the yaw drive device;

[0010] S2: Based on the measurement data of the meshing area and the backlash, calculate the required adjustment range of the yaw input gear's axis rotation and axis movement.

[0011] S3: The yaw drive unit is removed from the frame and lifted to a suitable height. The inclined washers are installed on the mounting surface of the frame according to the rotation adjustment range of the axis.

[0012] S4: Rotate the flange of the yaw drive device to move and adjust the mounting axis of the yaw input gear;

[0013] S5: Fine-tune the position of the beveled washer by moving the pin through the flange mounting hole of the flange, install the yaw drive device on the beveled washer, and use the locking bolt to pass through the flange mounting hole and the beveled washer to lock it on the frame.

[0014] S6: Repeat step S1 to re-inspect the meshing area and backlash between the yaw input gear and the driven gear.

[0015] Furthermore, the inclined washer consists of a low washer ring area, a high washer ring area, and a transition washer ring area, with the transition washer ring area arranged between the low washer ring area and the high washer ring area.

[0016] Furthermore, the transition pad ring region includes a first transition pad ring region and a second transition pad ring region with the same structure, and the low pad ring region, the first transition pad ring region, the high pad ring region and the second transition pad ring region sequentially surround each other to form a ring structure.

[0017] Furthermore, the inclined washer has a standard surface and a working inclined surface, the working inclined surface gradually increasing from the low washer ring area to the high washer ring area.

[0018] Furthermore, both the low pad ring area and the high pad ring area are provided with pad ring positioning holes.

[0019] Furthermore, the frame is provided with a positioning step, the positioning step has a step hole in the middle and a step positioning hole, the yaw input gear passes through the step hole and the flange is installed on the positioning step.

[0020] Furthermore, in step S3, the working inclined surface of the inclined washer is installed in conjunction with the positioning step of the frame, and the standard surface of the inclined washer is installed in conjunction with the flange.

[0021] Furthermore, the positioning step has four adjustment zones in the circumferential direction, and the high pad ring is installed in different adjustment zones for rotational adjustment of the yaw input gear in the axial direction.

[0022] Furthermore, in step S1, the meshing area between the yaw input gear and the driven gear is measured using the red lead method, and the tooth clearance between the yaw input gear and the driven gear is measured using the solder wire method.

[0023] Furthermore, in step S5, the locking bolts are tightened onto the frame in a cross-shaped sequence.

[0024] The beneficial effects of this technical solution are:

[0025] The yaw gear meshing adjustment method of the wind turbine generator set of the present invention can realize the rotational adjustment of the yaw input gear axis by adjusting the installation of the inclined washer at different positions, and realize the movement adjustment of the yaw input gear axis by adjusting the flange of the yaw input gear. The coordinated operation of the two directions greatly reduces the number of trial installations and improves maintenance efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall installation of the present invention;

[0027] Figure 2 This is a schematic diagram of the frame positioning steps of the present invention;

[0028] Figure 3 This is a schematic diagram of gear meshing from an isometric perspective, as per the present invention.

[0029] Figure 4 This is a schematic diagram of the gear meshing side of the present invention;

[0030] Figure 5 This is a top view schematic diagram of gear meshing according to the present invention;

[0031] Figure 6 This is a schematic diagram of the inclined washer of the present invention;

[0032] Figure 7 This is a side view of the inclined washer of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1-Yaw drive device; 2-Frame; 3-Driven gear; 4-Yaw input gear; 5-Step positioning hole; 6-Positioning step; 7-Step hole; 8-Flange; 9-Flange mounting hole; 10-Bevel gasket; 11-Low gasket area; 12-First transition gasket area; 13-High gasket area; 14-Second transition gasket area; 15-Gasket positioning hole; 16-Working bevel; 17-Standard surface. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and for 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., 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. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] like Figure 1 As shown in the embodiments of this application, a method for adjusting the yaw gear meshing of a wind turbine generator set includes the following steps:

[0040] S1: Measure the meshing area and backlash between the yaw input gear 4 and the driven gear 3 at the end of the yaw drive device 1; using the traditional red lead method and solder wire method, measure the two parameters between the yaw input gear 4 and the driven gear 3, namely the meshing area and backlash, as reference data for subsequent adjustment of the yaw input gear 4.

[0041] S2: Based on the measurement data of the meshing area and the backlash, calculate the required adjustment range of the axial rotation and the adjustment range of the axial movement of the yaw input gear 4. Figure 4 As shown, the axial direction is the same as the mounting axis of the yaw input gear 4 at the end of the yaw drive device 1. Axis rotation adjustment means that the axis tilts and rotates in the XZ plane to adjust the meshing area between the gears, as shown. Figure 2 As shown, keep the mounting axis of the yaw input gear 4 stationary in the Z direction, and adjust the mounting axis of the input gear 4 to move in the XY plane, that is, realize the axis movement adjustment, so as to realize the backlash adjustment of the meshing gear;

[0042] S3: The yaw drive unit 1 is disassembled from the frame 2 and lifted to a suitable height. The inclined washer 10 is installed on the mounting surface of the frame 2 according to the axis rotation adjustment range. After the yaw drive unit 1 is disassembled from the frame, it is lifted to a certain height. Since the inclined washer 10 is composed of four separate parts, the lifting height does not need to be too high to facilitate subsequent quick installation. The axis rotation adjustment range is calculated according to the previous steps. The inclined washer 10 is initially installed. The four parts of the inclined washer 10 are installed in the calculated appropriate positions.

[0043] S4: Rotate the flange 8 of the yaw drive device 1 to move and adjust the mounting axis of the yaw input gear 4; the yaw drive device 1 is an eccentric structure (this is the prior art), and by rotating the mounting position of the flange 8, the eccentric adjustment of the yaw input gear 4 at the end of the yaw drive device 1 can be achieved.

[0044] S5: Use a pin (a rod with a small diameter is sufficient) to pass through the flange mounting hole 9 of the flange 8 and move the inclined washer 10 to make a fine adjustment of its position. Install the yaw drive device 1 on the inclined washer 10, and use a locking bolt to pass through the flange mounting hole 9 and the inclined washer 10 and lock it on the frame 2. Since the lifting height of the yaw drive device 1 is not high, when making a fine adjustment of the position of the inclined washer 10, use a pin to pass through the flange mounting hole 9 and move the inclined washer 10 to make a fine adjustment of its position. After adjusting to the appropriate position, lower the yaw drive device 1 onto the inclined washer 10, and use a locking bolt to pass through the flange mounting hole 9 and the inclined washer and lock it on the frame 2.

[0045] S6: Repeat step S1 to re-inspect the meshing area and backlash between the yaw input gear and the driven gear; after the flange is locked and installed, re-inspect to observe whether the adjusted yaw drive device 1 is adjusted to the required position.

[0046] The yaw gear meshing adjustment method of the wind turbine generator set of the present invention can realize the rotational adjustment of the yaw input gear 4 in the axial direction by adjusting and installing the inclined washer 10 at different positions, and realize the movement adjustment of the yaw input gear 4 in the axial direction by rotating and adjusting the flange 8 of the yaw input gear 4. The coordinated cooperation of the two directions greatly reduces the number of trial installations and improves maintenance efficiency.

[0047] In this embodiment, the inclined washer 10 is composed of a low washer ring area 11, a high washer ring area 13 and a transition washer ring area, with the transition washer ring area arranged between the low washer ring area 11 and the high washer ring area 13.

[0048] like Figures 6-7As shown, the inclined washer 10 adopts a split structure, including a low washer ring area 11, a high washer ring area 13, and a transition washer ring area set between the two. Each washer ring area can be engraved with a number to facilitate the identification of the front and back during installation. The split structure makes it convenient to position and install each section of the inclined washer 10 without completely lifting the yaw input gear 4 off the frame when lifting the yaw drive device 1, thereby improving installation efficiency.

[0049] In this embodiment, the transition pad ring region includes a first transition pad ring region 12 and a second transition pad ring region 14 with the same structure. The low pad ring region 11, the first transition pad ring region 12, the high pad ring region 13 and the second transition pad ring region 14 sequentially surround each other to form a ring structure.

[0050] like Figures 6-7 As shown, the first transition pad ring region 12 and the second transition pad ring region 14 have the same structure and are both arranged between the low pad ring region 11 and the high pad ring region 13. During use, each pad ring region is arranged according to… Figure 6 The gear is arranged in a central configuration and installed on the frame 2, forming a ring structure to adjust the mounting axis of the yaw input gear 4.

[0051] In this embodiment, the inclined washer 10 has a standard surface 17 and a working inclined surface 16, which gradually increases from the low washer ring area 11 to the high washer ring area 13.

[0052] like Figures 6-7 As shown, after the inclined washer 10 is installed, a standard surface 17 and a working inclined surface 16 are formed. The standard surface 17 is attached to the flange 8, and the working inclined surface 16 is attached to the frame 2. The working inclined surface 16 gradually rises from the low washer ring area 11 to the high washer ring area 13. The overall structure forms a wedge-shaped block structure, which is used to raise the flange 8 at the position that needs to be adjusted, thereby realizing the adjustment of the axial direction of the yaw input gear 4 to meet the subsequent use requirements.

[0053] In this embodiment, both the low pad ring area 11 and the high pad ring area 13 are provided with pad ring positioning holes 15.

[0054] like Figures 6-7As shown, each washer ring area is provided with washer ring positioning holes 15, and the number of washer ring positioning holes 15 is set to an odd number. The middle hole position of the low washer ring area 11 is the thinnest part of the entire washer (fixed to 2mm in this technical solution); the middle hole position of the high washer ring area 13 is the thickest part of the entire washer (thickness h); the first transition washer ring area 12 and the second transition washer ring area 14 have the same structure and are symmetrically distributed with respect to the middle hole position of the low washer ring area 11; the high washer ring area 13 is provided with multiple specifications, and its thickest part thickness h is 3.0mm, 3.4mm, 3.8mm, 4.2mm, 4.6mm, 5.0mm, respectively, corresponding to the actual maximum adjustment height (the difference between the thickest and thinnest part) of 1.0mm, 1.4mm, 1.8mm, 2.2mm, 2.6mm, 3.0mm, respectively, to meet the adjustment range of multiple ranges.

[0055] In this embodiment, a positioning step 6 is provided on the frame 2, a step hole 7 is provided in the middle of the positioning step 6, and a step positioning hole 5 is provided on the positioning step 6. The yaw input gear 4 passes through the step hole 7 and the flange 8 is installed on the positioning step 6.

[0056] like Figure 1-3 As shown, a positioning step 6 is provided on the frame 2. A step hole 7 is provided in the middle of the positioning step 6 for the installation of the yaw input gear 4. Correspondingly, a step positioning hole 5 is provided on the positioning step 6, which is used to lock the flange 8 with bolts.

[0057] In this embodiment, in step S3, the working inclined surface 16 of the inclined washer 10 is installed in conjunction with the positioning step 6 of the frame 2, and the standard surface 17 of the inclined washer 10 is installed in conjunction with the flange 8.

[0058] like Figure 6-7 As shown, after calculating the parameters, the high pad ring area 13 is installed in the area where the highest point pad needs to be installed. After the remaining parts are installed in sequence, they can be enclosed to form a ring structure, which can be installed in conjunction with the corresponding components.

[0059] In this embodiment, the positioning step 6 has four adjustment areas in the circumferential direction, and the high pad ring area is installed in different adjustment areas for rotation adjustment in the axial direction of the yaw input gear 4.

[0060] like Figure 4-5As shown, four adjustment zones, A, B, C, and D, are formed on the positioning step 6. The inclined washer 10 is placed between the flange 8 and the frame 2. Due to its inclined structure, it is equivalent to applying a "wedge" under the drive mounting surface. By selecting high washer rings 13 of different specifications (i.e., different maximum thicknesses h) and rotating and adjusting the high washer rings 13 so that their thickest point (the middle hole of the high washer ring 13) is placed in different clockwise adjustment zones (the four adjustment zones A, B, C, and D), the tilt angle of the yaw drive gear axis in space (the tilt direction in the Z direction) can be precisely changed, thereby directly and controllably changing the meshing contact area of ​​the gear pair. The thickness and placement position of the washer also affect the center distance of the gear. Placing the high washer ring 13 in the direction of zone A will reduce the backlash, while placing it in zone C will increase the backlash. According to the different zone placement positions, the operator can simultaneously achieve backlash adjustment compensation when calculating the washer specifications and positions to adjust the meshing area, and achieve coordinated and precise control of the backlash by fine-tuning the washer position and the flange 8 mounting position.

[0061] In this embodiment, in step S1, the meshing area between the yaw input gear 4 and the driven gear 3 is measured using the red lead method, and the tooth clearance between the yaw input gear 4 and the driven gear 3 is measured using the solder wire method.

[0062] like Figure 1 In step S1, the meshing area and tooth clearance between the meshing gears can be measured using the existing red lead method and solder wire method, which facilitates subsequent positional adjustment of the structure to meet the installation accuracy requirements.

[0063] In this embodiment, in step S5, the locking bolts are locked onto the frame 2 in a cross-shaped sequence.

[0064] like Figure 1-2 As shown, after the yaw drive device 1 is installed with the inclined washer 10, the locking bolts are tightened in a cross-shaped sequence, in conjunction with the flange 8 and the frame 2.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for adjusting the meshing of the yaw gear in a wind turbine generator set, characterized in that: Includes the following steps: S1: Measure the meshing area and backlash between the yaw input gear (4) and the driven gear (3) at the end of the yaw drive device (1); S2: Based on the measurement data of the meshing area and the measurement data of the tooth backlash, calculate the range of shaft rotation adjustment and the range of shaft movement adjustment required for the yaw input gear (4); S3: The yaw drive device (1) is disassembled from the frame (2) and lifted to a suitable height. The inclined washers (10) are installed on the mounting surface of the frame (2) according to the rotation adjustment range of the axis. S4: Rotate the flange (8) of the yaw drive device (1) to move and adjust the mounting axis of the yaw input gear (4); S5: By using a pin to move the inclined washer (10) through the flange mounting hole (9) of the flange (8) to make a fine adjustment of the position, the yaw drive device (1) is installed on the inclined washer (10), and the locking bolt is passed through the flange mounting hole (9) and the inclined washer (10) and locked on the frame (2). S6: Repeat step S1 to re-inspect the meshing area and backlash between the yaw input gear (4) and the driven gear (3).

2. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 1, characterized in that: The inclined washer (10) consists of a low washer ring area (11), a high washer ring area (13) and a transition washer ring area, wherein the transition washer ring area is arranged between the low washer ring area (11) and the high washer ring area (13).

3. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 2, characterized in that: The transition pad ring area includes a first transition pad ring area (12) and a second transition pad ring area (14) with the same structure. The low pad ring area (11), the first transition pad ring area (12), the high pad ring area (13) and the second transition pad ring area (14) sequentially surround to form a ring structure.

4. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 2, characterized in that: The inclined washer (10) has a standard surface (17) and a working inclined surface (16), which gradually increases from the low washer ring area (11) to the high washer ring area (13).

5. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 4, characterized in that: Both the low pad ring area (11) and the high pad ring area (13) are provided with pad ring positioning holes (15).

6. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 5, characterized in that: The frame (2) is provided with a positioning step (6), the positioning step (6) has a step hole (7) in the middle and a step positioning hole (5) on the positioning step (6), the yaw input gear (4) passes through the step hole (7) and the flange (8) is installed on the positioning step (6).

7. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 6, characterized in that: In step S3, the working inclined surface (16) of the inclined gasket (10) is installed in conjunction with the positioning step (6) of the frame (2), and the standard surface of the inclined gasket (10) is installed in conjunction with the flange (8).

8. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 6, characterized in that: The positioning step (6) has four adjustment areas in the circumferential direction. The high pad ring area (13) is installed in different adjustment areas for the rotation adjustment of the yaw input gear (4) in the axial direction.

9. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 1, characterized in that: In step S1, the meshing area between the yaw input gear (4) and the driven gear (3) is measured using the red lead method, and the tooth clearance between the yaw input gear (4) and the driven gear (3) is measured using the solder wire method.

10. The method for adjusting the yaw gear meshing of a wind turbine generator set according to claim 1, characterized in that: In step S5, the locking bolts are locked onto the frame (2) in a cross-shaped sequence.

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