Blade dislocation adjustment guide structure and disassembly auxiliary tool thereof

Abstract

The utility model relates to a blade dislocation adjusting and guiding structure and an auxiliary dismounting tool thereof, the blade dislocation adjusting and guiding structure comprises a positioning pin, the positioning pin is fixedly provided with a stop table used for abutting against the upper end face of a variable pitch bearing, the positioning pin is fixedly provided with a plurality of positioning tables located below the stop table, and the stop table and the positioning tables are arranged in a staggered mode. The multiple positioning tables are vertically distributed at intervals, the lowermost positioning table is used for being matched with and connected to a blade through hole of a blade in a sliding mode, and the other positioning tables are used for being matched with and connected to mounting through holes of a variable pitch bearing in a sliding mode. According to the utility model, the technical problems that the existing blade bolt and the pitch bearing mounting through hole are staggered, the staggered adjustment is inconvenient, and the broken bolt is inconvenient to take out and replace can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of installation, operation and maintenance of wind turbine generator sets, in particular to a blade misalignment adjustment guide structure and a disassembly auxiliary tooling thereof. Background Art

[0002] The blades of the variable pitch wind turbine are mounted on the hub through the variable pitch bearing. The blades are connected to the variable pitch bearing through multiple blade bolts distributed at circumferential intervals, and the variable pitch bearing is connected and fixed to the hub through multiple hub bolts distributed at circumferential intervals.

[0003] Theoretically, the blade bolts and the pitch bearing mounting holes are designed to be concentric. Even if there is a certain offset, the bolts can be used for certain positioning. This design can ensure that the wind farm is easy and quick to install. However, due to the thin diameter of the middle part of the blade bolts, the blade bolts cannot play a positioning role. In addition, there are no other positioning measures between the blades and the pitch bearings. As a result, after the unit is installed, some units have misalignment between the blade bolts and the pitch bearing mounting holes. This leads to complex force on the blade bolts. In addition to bearing tension, there may also be additional bending moments or shear forces, which may eventually lead to the breakage of the blade bolts. At the same time, the blade bolts cannot be removed for replacement after they are broken. Utility Model Content

[0004] The utility model aims to solve the technical problems that the existing blade bolts and the pitch bearing mounting through holes are misaligned, making it inconvenient to adjust the misalignment and to remove and replace the broken bolts. A blade misalignment adjustment guide structure and a disassembly auxiliary tooling are provided.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] On the one hand, the utility model provides a blade misalignment adjustment guide structure, including a positioning pin, the positioning pin is fixed with a stop platform for abutting the upper end surface of the pitch bearing, and the positioning pin is fixed with multiple positioning platforms all located below the stop platform, the multiple positioning platforms are vertically spaced apart, and the lowest one of the positioning platforms is used to adapt to and slideably connect to the blade through hole of the blade, and the other positioning platforms are used to adapt to and slideably connect to the mounting through holes of the pitch bearing.

[0007] The beneficial effect of the present invention is that when performing blade correction and blade bolt replacement operations, the blade nuts on all blade bolts can be loosened first to separate the mating surface of the blade and the pitch bearing, and then 2-3 blade bolts can be removed and positioning pins can be installed until the lower end of the positioning pin is initially in contact with the edge of the blade through-hole, and the blade bolts can be re-tightened until the end face of the blade is completely fitted with the lower end face of the pitch bearing, and at the same time, the other positioning platforms of the positioning pin are fitted with the wall of the mounting through-hole of the pitch bearing, and the lowest positioning platform is fitted with the wall of the blade through-hole of the blade, so that the blade misalignment adjustment is completed, and finally the positioning pins are pulled out and the blade bolts at the positioning pin position are installed, and the blade bolt misalignment adjustment work is completed; through the guiding auxiliary role of the above positioning pins, the technical problems of the existing misalignment of the blade bolts and the pitch bearing mounting through-hole, the inconvenience of misalignment adjustment, and the inconvenience of removing and replacing the broken bolts can be improved.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, two positioning platforms are arranged at intervals, and the upper one is used to adapt to and slideably connect to the mounting through hole of the pitch bearing, and the lower one is used to adapt to and slideably connect to the blade through hole of the blade.

[0010] The beneficial effect of adopting the above further scheme is: the variable pitch bearing and the blade are positioned and guided respectively by the upper and lower positioning platforms, so that when the blade moves upward and abuts against the lower end surface of the variable pitch bearing, the installation through hole and the blade through hole are coaxial, completing the guide adjustment operation.

[0011] Furthermore, one of the positioning platforms located below is simultaneously adapted to and slidably connected to the mounting through hole of the pitch bearing.

[0012] The beneficial effect of adopting the above further scheme is: the radial side surface of the lowest positioning platform is simultaneously in contact with the hole wall of the mounting hole and the hole wall of the blade hole to guide and adjust the upward moving blade, so that the mounting hole and the blade hole are coaxial, completing the guide adjustment operation.

[0013] Furthermore, the length from the stop platform to the lower end of the positioning pin is L1, and the sum of the axial lengths of the positioning platforms is L2, then L2 = (20% - 30%) x L1.

[0014] The beneficial effect of adopting the above-mentioned further scheme is: while ensuring that each positioning platform can smoothly guide and position the variable pitch bearing and blade, the contact friction between the positioning pin and the mounting hole of the variable pitch bearing during the adjustment process is made as low as possible, thereby reducing the friction resistance of the positioning pin when it is pulled out later.

[0015] Furthermore, a guide section is provided at the lower end of the positioning pin, and the guide section is located below the lowest positioning platform, and a guide surface inclined inward from top to bottom is provided on the radial side of the guide section.

[0016] The beneficial effect of adopting the above-mentioned further scheme is that when the blade is moved upward and abuts against the lower end face of the pitch bearing, the guide surface can guide the blade moving upward, ensuring that the blade gradually approaches the lower end face of the pitch bearing through the guide surface of the locating pin. At this time, the blade bolt and the pitch bearing mounting through hole are generally concentric.

[0017] Furthermore, the guide surface is connected to the lowest positioning platform.

[0018] The beneficial effect of adopting the above further solution is that when the blade is guided by the guide surface and moves upward, the lowest positioning platform can directly enter the blade through hole for positioning.

[0019] On the other hand, the utility model provides a disassembly auxiliary tooling for a blade misalignment adjustment guide structure, which is applied to the blade misalignment adjustment guide structure, including an anti-rotation component for preventing the positioning pin from rotating and a disassembly pin nut threadedly connected to the upper end of the positioning pin.

[0020] The beneficial effect of adopting the above-mentioned further scheme is that when the locating pin is pulled out, the anti-rotation component is used to prevent the locating pin from rotating, and the locating pin is lifted by twisting the pin nut. When part of the locating platform of the locating pin is out of contact with the blade through hole of the blade, the locating pin is in a naturally stress-free state, and the locating pin can be pulled out manually at this time.

[0021] Furthermore, the anti-rotation assembly includes a support bushing and an anti-rotation rod with one end fixedly connected to the side wall of the support bushing. The upper side of the support bushing is provided with a socket for inserting the positioning pin, and the lower side is provided with an anti-rotation hole connected to the socket. The hole wall of the anti-rotation hole is adapted to and abuts against the outer side of the stop platform, and the other end of the anti-rotation rod is used to abut against the wheel hub.

[0022] The beneficial effect of adopting the above further solution is that: when the pin nut is turned, if the pin nut and the support bushing rotate, the anti-rotation rod on the support bushing touches the hub surface to prevent them from rotating further.

[0023] Furthermore, the anti-rotation assembly further includes a sleeve, one end of which is slidably connected to the other end of the anti-rotation rod, and the other end of which is used to abut against the wheel hub.

[0024] The beneficial effect of adopting the above further solution is: during the process of twisting the dismantling nut, if the anti-rotation rod cannot touch the wheel hub, the sleeve is put on so that the other end of the sleeve abuts against the wheel hub.

[0025] Furthermore, the depth of the anti-rotation hole is greater than the axial length of the stop platform and is not less than the axial length of the portion of the positioning pin used to be inserted into the blade through-hole.

[0026] The beneficial effect of adopting the above further solution is that as the pin nut continues to be tightened, the locating pin will be lifted. When the lower end of the locating pin is out of contact with the through hole at the root of the blade, the locating pin is in a naturally stress-free state and can be manually pulled out. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the blade misalignment adjustment guide structure of the present utility model;

[0028] Figure 2 This is a structural diagram of the disassembly auxiliary tooling for the blade misalignment adjustment guide structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the blade bolt disassembly structure, showing the blade in the downward position;

[0030] Figure 4 This is a schematic diagram of the preliminary installation structure of the positioning pin, showing the state in which the guide surface of the positioning pin contacts the edge of the blade through hole;

[0031] Figure 5 This is a schematic diagram of the downward installation structure of the positioning pin, showing the positioning table positioning the blade and the stop table not contacting the pitch bearing;

[0032] Figure 6 This is a schematic diagram of the structure in which the positioning pin is installed, showing the state in which the stopper contacts the pitch bearing;

[0033] Figure 7 This is a schematic diagram of the disassembly structure of the positioning pin, showing the anti-rotation component and the disassembly pin nut installed in place;

[0034] Figure 8 This is a schematic diagram of the further disassembly structure of the positioning pin, showing the state in which the stopper is moved up and the positioning table is out of the blade through hole;

[0035] Figure 9 This is a diagram of the concentric installation structure of blade bolts in the prior art;

[0036] Figure 10 This is a diagram of the staggered installation structure of blade bolts in the prior art.

[0037] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0038] 1. Wheel hub; 11. Installation process hole;

[0039] 2. Pitch bearing; 21. Mounting through hole;

[0040] 3. Blade; 31. Blade through hole;

[0041] 4. Blade bolt; 41. Blade nut;

[0042] 5. Positioning pin; 51. Stop platform; 52. Positioning platform; 53. Guide surface;

[0043] 6. Anti-rotation assembly; 61. Support bushing; 611. Insertion hole; 612. Anti-rotation hole; 62. Anti-rotation rod; 63. Sleeve;

[0044] 7. Remove the pin nut. DETAILED DESCRIPTION

[0045] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0046] Typically, the blade bolt 4 and the mounting hole 21 of the pitch bearing 2 are designed to be concentric (e.g. Figure 9 ), even if there is a certain offset, the blade bolt 4 can be used for certain positioning. This design can ensure that the wind farm is easy and quick to install; however, since the middle part of the blade bolt 4 is thin, the blade bolt 4 cannot play a positioning role. In addition, there is no other positioning measure between the blade 3 and the pitch bearing 2. As a result, after the unit is installed, some units have the situation where the blade bolt 4 and the mounting through hole 21 of the pitch bearing 2 are misaligned (such as Figure 10 ), which results in complex force on the blade bolt 4. In addition to bearing tension, there may also be additional bending moment or shear force, which may eventually lead to the breakage of the blade bolt 4. At the same time, the blade bolt 4 cannot be removed for replacement after it is broken.

[0047] Among them, in order to reduce the possibility of shear force on the positioning surface of the blade bolt 4 between the blade 3 and the pitch bearing 2, and to increase the fatigue resistance of the positioning surface of the blade bolt 4 between the blade 3 and the pitch bearing 2, the middle part of the blade bolt 4 is a thin diameter, and the thin diameter section spans the positioning surface between the blade and the bearing.

[0048] A blade nut 41 is threadedly connected to the upper end of the blade bolt 4 , and a gasket is provided below the blade nut 41 .

[0049] The web of the hub 1 is further provided with mounting holes 11 corresponding to the blade bolts 4 .

[0050] In view of the above-mentioned prior art, a blade misalignment adjustment guide structure and its disassembly auxiliary tooling described in the present invention are described in detail below.

[0051] On the one hand, the present invention provides a blade misalignment adjustment guide structure, which is described in detail below.

[0052] Example 1

[0053] like Figures 1 to 6 A blade misalignment adjustment guide structure includes a positioning pin 5, the positioning pin 5 is fixed with a stop platform 51 for abutting the upper end surface of the pitch bearing 2, and the positioning pin 5 is fixed with multiple positioning platforms 52 all located below the stop platform 51, the multiple positioning platforms 52 are vertically spaced, and the lowest positioning platform 52 is used to adapt to and slideably connect to the blade through hole 31 of the blade 3, and the other positioning platforms 52 are used to adapt to and slideably connect to the mounting through hole 21 of the pitch bearing 2.

[0054] The beneficial effect of this embodiment is that when correcting the blade 3 and replacing the blade bolt 4, the blade nuts 41 on all the blade bolts 4 can be loosened first to separate the joint surface of the blade 3 and the pitch bearing 2, and then 2-3 blade bolts 4 can be removed and the positioning pins 5 can be installed until the lower end of the positioning pins 5 is initially in contact with the edge of the blade through hole 31, and the blade bolts 4 can be re-tightened until the end face of the blade 3 is completely aligned with the lower end face of the pitch bearing 2, and at the same time, the other positioning platforms 52 of the positioning pins 5 are aligned with the hole wall of the mounting through hole 21 of the pitch bearing 2, and the lowest positioning platform 52 is aligned with the hole wall of the blade through hole 31 of the blade 3, so that the misalignment adjustment of the blade 3 is completed, and finally, the positioning pins 5 are pulled out and the blade bolts 4 at the position of the positioning pins 5 are installed, and the misalignment adjustment of the blade bolts 4 is completed; through the guiding auxiliary role of the above positioning pins 5, the technical problems of the existing misalignment of the blade bolts 4 and the mounting through hole 21 of the pitch bearing 2, which is inconvenient to perform misalignment adjustment and it is inconvenient to remove and replace the broken bolts are improved.

[0055] The number of positioning platforms 52 may be two, three, four, or five. Furthermore, between two adjacent positioning platforms 52, the side walls of the positioning pin 5 and the wall of the mounting through hole 21 are clearance-fitted. This ensures that the positioning pin 5 as a whole does not deflect and reduces friction when the positioning platforms 52 are spaced apart.

[0056] Example 2

[0057] like Figures 1 to 6 On the basis of Example 1, two positioning platforms 52 are arranged at intervals, and the upper positioning platform 52 is used to adapt to and slideably connect to the mounting through hole 21 of the pitch bearing 2, and the lower positioning platform 52 is used to adapt to and slideably connect to the blade through hole 31 of the blade 3.

[0058] The beneficial effect of adopting the preferred solution in the above embodiment is that the pitch bearing 2 and the blade 3 are positioned and guided respectively by the upper and lower positioning platforms 52, so that when the blade 3 moves upward and abuts against the lower end surface of the pitch bearing 2, the mounting through hole 21 and the blade through hole 31 are coaxial, completing the guide adjustment operation.

[0059] Example 3

[0060] like Figures 1 to 6 On the basis of embodiments 1 and 2, a positioning platform 52 located below is simultaneously adapted to and slidably connected to the mounting through hole 21 of the pitch bearing 2.

[0061] The beneficial effect of adopting the preferred solution in the above embodiment is that the radial side surface of the lowest positioning platform 52 is simultaneously in contact with the hole wall of the mounting hole 21 and the hole wall of the blade hole 31 to guide and adjust the upward-moving blade 3, so that the mounting hole 21 and the blade hole 31 are coaxial, completing the guide adjustment operation.

[0062] Example 4

[0063] like Figures 1 to 6 On the basis of Examples 1-3, the length from the stop platform 51 to the lower end of the positioning pin 5 is L1, and the sum of the axial lengths of the positioning platforms 52 is L2, then L2 = (20% - 30%) × L1.

[0064] The beneficial effect of adopting the preferred solution in the above embodiment is that, while ensuring that each positioning platform 52 can smoothly guide and position the variable pitch bearing 2 and the blade 3, the contact friction between the positioning pin 5 and the mounting through hole 21 of the variable pitch bearing 2 during the adjustment process is made as low as possible, thereby reducing the friction resistance of the positioning pin 5 when it is pulled out later.

[0065] In the figure, only two positioning platforms 52 are shown. In this case, the sum of the axial lengths of the two positioning platforms 52 is L2, where L2 = (20% - 30%) × L1.

[0066] Example 5

[0067] like Figures 1 to 6 On the basis of Examples 1-4, a guide section is provided at the lower end of the positioning pin 5, the guide section is located below the lowest positioning platform 52, and a guide surface 53 inclined inward from top to bottom is provided on the radial side of the guide section.

[0068] The beneficial effect of adopting the preferred scheme in the above embodiment is that when the blade 3 is moved upward and abuts against the lower end surface of the pitch bearing 2, the guide surface 53 can guide the upward-moving blade 3, ensuring that the blade 3 gradually approaches the lower end surface of the pitch bearing 2 through the guide surface 53 of the locating pin 5. At this time, the blade bolt 4 and the mounting through hole 21 of the pitch bearing 2 are generally concentric.

[0069] By providing the guide section, the lower end of the positioning pin 5 is in an inverted frustum-shaped structure. When the positioning pin 5 is inserted from top to bottom into the mounting through hole 21 , the guide surface 53 can also provide a guide.

[0070] Example 6

[0071] like Figures 1 to 6 Based on Examples 1-5, the guide surface 53 is connected to the lowest positioning platform 52.

[0072] The beneficial effect of adopting the preferred solution in the above embodiment is that when the blade 3 is guided by the guide surface 53 and moves upward, the lowermost positioning platform 52 can directly enter the blade through hole 31 for positioning.

[0073] On the other hand, the present invention provides a disassembly auxiliary tool for a blade misalignment adjustment guide structure, as described in detail below.

[0074] Example 7

[0075] like Figure 7 and Figure 8 , a disassembly auxiliary tooling for a blade misalignment adjustment guide structure, applied to a blade misalignment adjustment guide structure as described in Examples 1-6, includes an anti-rotation component 6 for preventing the positioning pin 5 from rotating and a disassembly pin nut 7 threadedly connected to the upper end of the positioning pin 5.

[0076] The beneficial effect of adopting the preferred solution in the above embodiment is that when the locating pin 5 is pulled out, the anti-rotation component 6 is used to prevent the locating pin 5 from rotating, and the locating pin 5 is lifted by screwing the pin removal nut 7. When the partial locating platform 52 of the locating pin 5 is out of contact with the blade through hole 31 of the blade 3, the locating pin 5 is in a naturally stress-free state, and the locating pin 5 can be pulled out manually at this time.

[0077] Example 8

[0078] like Figure 7 and Figure 8 On the basis of Examples 1-7, the cross-section of the stop platform 51 is polygonal; the anti-rotation component 6 includes a support bushing 61 and an anti-rotation rod 62, one end of which is fixedly connected to the side wall of the support bushing 61. The upper side of the support bushing 61 is provided with a socket 611 for inserting the positioning pin 5, and the lower side is provided with an anti-rotation hole 612 connected to the socket 611. The hole wall of the anti-rotation hole 612 is adapted to and abuts the outer side of the stop platform 51, and the other end of the anti-rotation rod 62 is used to abut against the wheel hub 1.

[0079] The beneficial effect of adopting the preferred solution in the above embodiment is that when the pin nut 7 is turned, if the pin nut 7 and the support bushing 61 rotate, the anti-rotation rod 62 on the support bushing 61 touches the surface of the wheel hub 1 to prevent it from continuing to rotate.

[0080] Specifically, the anti-rotation assembly 6 can be installed by inserting it into the positioning pin 5 from top to bottom, and when the pin nut 7 is rotated, a force can be applied to the pin nut 7 from the installation process hole 11.

[0081] As one specific solution of this embodiment, the cross-section of the stop platform 51 is polygonal or elliptical. Specifically, the cross-section of the stop platform 51 can be triangular, quadrilateral, pentagonal, or hexagonal. In this case, the wall of the anti-rotation hole 612 fits and abuts against the outer side of the stop platform 51, preventing the support bushing 61 and the stop platform 51 from rotating relative to each other.

[0082] As a second specific solution of this embodiment, the cross-section of the stop platform 51 is circular, and a rotation-stopping structure is connected between the stop platform 51 and the support bushing 61. The rotation-stopping structure can be a bolt or other clamping structure to prevent the support bushing 61 and the stop platform 51 from rotating relative to each other.

[0083] Example 9

[0084] like Figure 7 and Figure 8 On the basis of embodiments 1-8, the anti-rotation assembly 6 further includes a sleeve 63 , one end of the sleeve 63 is slidably connected to the other end of the anti-rotation rod 62 , and the other end is used to abut against the wheel hub 1 .

[0085] The beneficial effect of adopting the preferred solution in the above embodiment is that, during the process of screwing the dismantling nut 7 , if the anti-rotation rod 62 cannot touch the wheel hub 1 , the sleeve 63 is put on so that the other end of the sleeve 63 abuts against the wheel hub 1 .

[0086] Example 10

[0087] like Figure 7 and Figure 8 Based on Examples 1-9, the depth of the anti-rotation hole 612 is greater than the axial length of the stop platform 51 and is not less than the axial length of the portion of the positioning pin 5 for inserting into the blade through hole 31 .

[0088] The beneficial effect of adopting the preferred solution in the above embodiment is that as the pin nut 7 continues to be tightened, the locating pin 5 will be lifted. When the lower end of the locating pin 5 is out of contact with the through hole at the root of the blade, the locating pin 5 is in a naturally stress-free state, and the locating pin 5 can be pulled out manually.

[0089] The following is a detailed description of the specific method of using the blade misalignment adjustment guide structure and the auxiliary tooling for disassembly described in the present invention:

[0090] ① Adjust the fan blade 3 so that it is vertically downward, loosen all the blade nuts 41 of the blade 3, and separate the blade 3 from the pitch bearing 2. The gap is about 5mm. Theoretically, there is a misalignment at this time. Under the weight of the blade 3, it will be in a preliminary reset (such as Figure 3), however, since the blade 3 is not completely vertically downward, there may still be a certain amount of misalignment (the blade bolt 4 cannot be removed normally), and the misalignment is adjusted by jogging the pitch drive;

[0091] ② According to the position of the installation process hole 11 on the hub 1, remove 2-3 blade bolts 4, and then install the positioning pin 5. Before installing the positioning pin 5, apply grease around the diameter of the positioning platform 52 to reduce the friction resistance when pulling out later. After the initial installation of the positioning pin 5, if Figure 4 At this time, the guide section of the positioning pin 5 initially contacts the edge of the blade through hole 31;

[0092] ③ Re-tighten the blade bolt 4, shaking the positioning pin 5 during the process to ensure that the blade 3 gradually approaches the surface of the pitch bearing 2 through the guide part at the end of the positioning pin 5. At this time, the blade bolt 4 and the mounting hole 21 of the pitch bearing 2 are generally concentric. Figure 5 , continue to tighten the other blade bolts 4 until the end face of the blade 3 is completely fitted with the pitch bearing 2, and the positioning pin 5 is fitted with the pitch bearing 2, such as Figure 6 , the offset adjustment of blade 3 is completed;

[0093] ④ Put the support bushing 61 on the other end of the locating pin 5 and install the pin nut 7. Pull out the locating pin 5 by tightening the pin nut 7. When the pin nut 7 is turned, if the pin nut 7 and the support bushing 61 rotate, the anti-rotation rod 62 on the support bushing 61 touches the wheel hub 1 to prevent it from rotating further. Figure 7 If the anti-rotation rod 62 cannot touch the wheel hub 1, it is necessary to add a sleeve 63 (not shown in the figure) on the anti-rotation rod 62; as the pin nut 7 continues to be tightened, the positioning pin 5 will be lifted. When the positioning platform 52 at the bottom of the positioning pin 5 is out of contact with the blade through hole 31 of the blade 3, the positioning pin 5 is in a naturally stress-free state. At this time, the positioning pin 5 can be manually pulled out. Figure 8 ;

[0094] ⑤Finally, install the blade bolt 4 at the location of the locating pin 5 and tighten the blade nut 41. The dislocation adjustment of the blade bolt 4 is completed.

[0095] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0096] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0097] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0098] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0100] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A blade misalignment adjustment guide structure, characterized in that: The invention comprises a positioning pin (5), wherein the positioning pin (5) is fixed with a stop platform (51) for abutting against the upper end surface of the pitch bearing (2), and the positioning pin (5) is fixed with a plurality of positioning platforms (52) all located below the stop platform (51), wherein the plurality of positioning platforms (52) are vertically spaced and distributed, and the lowest positioning platform (52) is used to adapt to and be slidably connected to the blade through hole (31) of the blade (3), and the other positioning platforms (52) are used to adapt to and be slidably connected to the mounting through hole (21) of the pitch bearing (2).

2. The blade misalignment adjustment guide structure according to claim 1, characterized in that: Two positioning platforms (52) are arranged at intervals, and the upper positioning platform (52) is used to adapt to and slideably connect to the mounting through hole (21) of the pitch bearing (2), and the lower positioning platform (52) is used to adapt to and slideably connect to the blade through hole (31) of the blade (3).

3. The blade misalignment adjustment guide structure according to claim 2, characterized in that: The positioning platform (52) located below is simultaneously adapted to and slidably connected to the mounting through hole (21) of the pitch bearing (2).

4. The blade misalignment adjustment guide structure according to claim 1, characterized in that: The length from the stop platform (51) to the lower end side of the positioning pin (5) is L1, and the sum of the axial lengths of the positioning platforms (52) is L2, then L2 = (20% - 30%) × L1.

5. The blade misalignment adjustment guide structure according to any one of claims 1 to 4, characterized in that: The lower end of the positioning pin (5) is provided with a guide section, the guide section is located below the lowest positioning platform (52), and the radial side of the guide section is provided with a guide surface (53) inclined inward from top to bottom.

6. The blade misalignment adjustment guide structure according to claim 5, characterized in that: The guide surface (53) is connected to the lowest positioning platform (52).

7. A disassembly auxiliary tool for a blade misalignment adjustment guide structure, characterized in that: A blade misalignment adjustment guide structure as described in any one of claims 1 to 6 comprises an anti-rotation component (6) for preventing the positioning pin (5) from rotating and a dismantling nut (7) threadedly connected to the upper end of the positioning pin (5).

8. The auxiliary disassembly tool for the blade misalignment adjustment guide structure according to claim 7, characterized in that: The anti-rotation assembly (6) includes a support bushing (61) and an anti-rotation rod (62) with one end fixedly connected to the side wall of the support bushing (61); the upper side of the support bushing (61) is provided with a socket (611) for inserting the positioning pin (5); the lower side is provided with an anti-rotation hole (612) connected to the socket (611); the hole wall of the anti-rotation hole (612) is adapted to and abuts against the outer side of the stop platform (51); the other end of the anti-rotation rod (62) is used to abut against the wheel hub (1).

9. The auxiliary disassembly tool for the blade misalignment adjustment guide structure according to claim 8, characterized in that: The anti-rotation assembly (6) further comprises a sleeve (63), one end of which is slidably connected to the other end of the anti-rotation rod (62), and the other end of which is used to abut against the wheel hub (1).

10. The auxiliary disassembly tool for the blade misalignment adjustment guide structure according to claim 8, characterized in that: The depth of the anti-rotation hole (612) is greater than the axial length of the stop platform (51) and is not less than the axial length of the portion of the positioning pin (5) used for inserting into the blade through hole (31).

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