Guiding device and guiding method for assembling a wind turbine shafting

Abstract

The embodiment of the present application provides a guide device for wind power generator shaft assembly and a guide method for wind power generator shaft assembly. The wind power generator shaft assembly comprises a first shaft and a second shaft sleeved outside the first shaft, and the first shaft and the second shaft can rotate relative to each other through a bearing installed between the first shaft and the second shaft. The guide device comprises: a first guide part, which is used for detachable connection with an end surface of the first shaft and coaxial distribution with the first shaft; and a second guide part, which is used for detachable connection with an end surface of the second shaft and coaxial distribution with the second shaft; wherein the center of one of the first guide part and the second guide part is provided with a guide pin, and the center of the other one is provided with a guide hole matched with the guide pin, and when the guide pin is inserted into the guide hole, the first shaft and the second shaft are coaxially aligned. The guide precision is high, the operation is convenient, and the guide efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wind turbine shaft assembly, and more specifically to a guiding device and a guiding method for wind turbine shaft assembly. Background Technology

[0002] The shaft system is a crucial component of a wind turbine generator set, and shaft assembly is a key process in the manufacturing of the unit, directly impacting product quality. In the assembly of a dual TRB (tapered roller bearing) shaft system, high precision is required for shaft alignment and post-installation rotation. Therefore, a guide device is typically used for alignment during assembly; however, the alignment operation is quite difficult, limiting the efficiency of shaft assembly. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a guiding device and a guiding method for assembling a wind turbine shaft system, so as to at least solve the problems of difficult and inefficient shaft system assembly operations.

[0004] A first aspect of the present invention provides a alignment device for assembling a wind turbine shaft system. The wind turbine shaft system includes a first shaft and a second shaft sleeved outside the first shaft, the first shaft and the second shaft being rotatable relative to each other via a bearing installed between them. The alignment device includes: a first alignment member for detachably connecting to one end face of the first shaft and coaxially distributed with the first shaft; and a second alignment member for detachably connecting to one end face of the second shaft and coaxially distributed with the second shaft; wherein one of the first and second alignment members has a guide pin at its center, and the other has a guide hole at its center adapted to the guide pin, such that when the guide pin is inserted into the guide hole, the first shaft and the second shaft are coaxially aligned.

[0005] A second aspect of the present invention provides a method for aligning a wind turbine shaft assembly, employing the alignment device provided in the first aspect of the present invention. The alignment method includes: placing a first shaft in a vertical state, installing a first alignment member onto one end face of the first shaft and distributing it coaxially with the first shaft; placing a second shaft in a vertical state, installing a second alignment member onto the upper end face of the second shaft and distributing it coaxially with the second shaft; simultaneously lifting the second alignment member and the second shaft and lowering them to the position corresponding to the first shaft, so that the second shaft is fitted onto the outside of the first shaft, wherein, during the lowering process, the alignment pin is aligned and inserted into the alignment hole.

[0006] The alignment device for wind turbine shaft assembly provided in this invention has two alignment components. The first alignment component is coaxially connected to the first shaft, and the second alignment component is coaxially connected to the second shaft. Then, the alignment pin at the center of the first alignment component engages with the alignment hole at the center of the second alignment component to achieve coaxial distribution of the first and second alignment components, ultimately achieving coaxial distribution of the first and second shafts with high alignment accuracy. Furthermore, during the alignment process, only one alignment pin and one alignment hole located at the center need to be aligned, making the operation convenient and quick, improving alignment efficiency, and thus improving the assembly efficiency of the shaft system. Moreover, since the alignment pin is located at the center of the shaft system, it is less likely to collide with or damage the alignment hole, thus increasing the service life of the alignment device and the alignment pass rate.

[0007] Further aspects and / or advantages of the general concept of the invention will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the general concept of the invention. Attached Figure Description

[0008] The above and other objects and features of the present invention will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0009] Figure 1 A schematic diagram of the alignment process for wind turbine shaft assembly in related technologies is shown;

[0010] Figure 2 This diagram illustrates an assembly schematic of a wind turbine shaft system and a guiding device according to an embodiment of the present invention.

[0011] Figure 3 A schematic diagram of the assembly of the first guide member and the spindle according to an embodiment of the present invention is shown;

[0012] Figure 4 A schematic diagram of the assembly of the second guide member and the fixed axis according to an embodiment of the present invention is shown;

[0013] Figure 5 A schematic diagram of the bottom structure of the second guide member according to an embodiment of the present invention is shown;

[0014] Figure 6 A schematic diagram of the structure of the second connecting flange according to an embodiment of the present invention is shown;

[0015] Figure 7 A schematic diagram of the structure of a guide pin according to an embodiment of the present invention is shown;

[0016] Figure 8 A schematic diagram of the structure of a guide pin inserted into a guide hole according to an embodiment of the present invention is shown;

[0017] Figure 9A schematic diagram of the structure of the bottom of the spindle according to an embodiment of the present invention is shown.

[0018] Figure 1 Explanation of icon numbers:

[0019] 1a Main spindle, 2a Fixed spindle, 3a Guide pin;

[0020] Figures 2 to 9 Explanation of icon numbers:

[0021] 1. First shaft, 11. Bottom flange

[0022] 2. Second axis

[0023] 3 First guide element, 31 First connecting flange, 311 First stop, 312 Second mounting hole, 313 First through hole, 32 Guide sleeve, 321 Guide hole, 322 Guide chamfer, 33 First notch

[0024] 4. Second guide element; 41. Second connecting flange; 411. Lifting lug; 412. Second stop; 413. Second through hole; 414. Countersunk groove; 42. Guide pin; 421. Pin body; 4211. Third stop; 422. Guide strip; 4221. Guide bevel; 43. Second notch.

[0025] 5. First bolt,

[0026] 6. Second bolt. Detailed Implementation

[0027] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be changed as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0028] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein, which will become clear upon understanding the disclosure of this application.

[0029] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0030] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0031] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "bonded to" another element, the element may be directly "on" another element, directly "connected to," or "bonded to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly bonded to" another element, no other elements may be present in between.

[0032] The terminology used herein is for the purpose of describing various examples only and is not intended to limit disclosure. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0033] The directional terms such as "above", "below", "top" and "bottom" used in this application are all based on the orientation of the product when it is in normal use.

[0034] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains upon understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0035] Shaft assembly reference in related technologies Figure 1The shaft system assembly is completed in a vertical position, with the main shaft 1a placed vertically. The guiding device consists of a pair of guide pins 3a installed on the two locking sleeve holes of the main shaft 1a. When the fixed shaft 2a is installed downwards onto the main shaft 1a, the guide hole on the bearing seat of the fixed shaft 2a covers the guide pins. However, this guiding method requires aligning the two guide pins during the guiding process, which is difficult to operate, and the guide pins are prone to wearing down the guide holes. Therefore, the current guiding scheme not only affects the assembly quality but also restricts the improvement of shaft system assembly efficiency.

[0036] Based on this, this application proposes a guiding device and method for assembling the shaft system of a wind turbine generator to solve the above problems.

[0037] The following will combine Figures 2 to 9 This invention introduces a guiding device and a guiding method for assembling a wind turbine shaft system, provided by embodiments of the present invention.

[0038] like Figures 1 to 5 As shown, a first aspect embodiment of the present invention provides a alignment device for assembling a wind turbine shaft system. The wind turbine shaft system includes a first shaft 1 and a second shaft 2 sleeved on the outside of the first shaft 1. The first shaft 1 and the second shaft 2 are rotatable relative to each other via a bearing installed between them. The alignment device includes: a first alignment member 3, which is detachably connected to one end face of the first shaft 1 and coaxially distributed with the first shaft 1; and a second alignment member 4, which is detachably connected to one end face of the second shaft 2 and coaxially distributed with the second shaft 2; wherein, one of the first alignment member 3 and the second alignment member 4 has a guide pin 42 at its center, and the other has a guide hole 321 adapted to the guide pin 42 at its center, such that when the guide pin 42 is inserted into the guide hole 321, the first shaft 1 and the second shaft 2 are coaxially aligned.

[0039] The alignment device for wind turbine shaft assembly provided in this embodiment of the invention has two alignment members. The first alignment member 3 is aligned and coaxially connected to the first shaft 1, and the second alignment member 4 is aligned and coaxially connected to the second shaft 2. Then, the alignment pin 42 at the center of the first alignment member 3 cooperates with the alignment hole 321 at the center of the second alignment member 4 to achieve coaxial distribution of the first alignment member 3 and the second alignment member 4, ultimately achieving coaxial distribution of the first shaft 1 and the second shaft 2 with high alignment accuracy. Moreover, during the alignment process, only one alignment pin 42 and one alignment hole 321 located at the center need to be aligned, making the operation convenient and quick, improving alignment efficiency, and thus improving the assembly efficiency of the shaft system. Furthermore, since the guide pin 42 is located at the center of the shaft system, compared to the prior art which requires simultaneous alignment of two guide holes 321, it is less likely to collide with and damage the guide holes 321. It also avoids collision with the guide holes 321 due to the relative rotation of the first shaft 1 and the second shaft 2, thus improving the service life and alignment pass rate of the guide device. In addition, after the guide device is installed on the shaft system and alignment is completed, since the guide pin 42 and guide hole 321 will be located on the central axis of the shaft system, the bearing can be directly run-in without disassembling the guide device. This not only saves time on disassembling the guide device, but also saves time and effort in achieving the required running-in without it, as running-in without a guide device is time-consuming and labor-intensive. Therefore, running-in with a guide device saves time and improves shaft system assembly efficiency.

[0040] In addition, the coaxial deviations of the first guide element 3 and the first shaft 1, and the coaxial deviations of the second guide element 4 and the second shaft 2 can be neutralized and canceled out to improve the guiding effect.

[0041] In this embodiment, one of the first shaft 1 and the second shaft 2 can be a fixed shaft, and the other can be a movable shaft. The guiding device is suitable for guiding shaft systems where the fixed shaft is sleeved outside the movable shaft, and also for guiding shaft systems where the movable shaft is sleeved outside the fixed shaft. In the guiding device, the first guiding member 3 can have a guiding pin 42, and the second guiding member 4 can have a guiding hole 321, so that during the process of the second shaft 2 being installed and placed outside the first shaft 1, the guiding hole 321 aligns with the guiding pin 42 and is sleeved around the guiding pin 42. Alternatively, the first guiding member 3 can have a guiding hole 321, and the second guiding member 4 can have a guiding pin 42, in which case during the process of the second shaft 2 being installed and placed outside the first shaft 1, the guiding pin 42 is aligned and inserted into the guiding hole 321. Other structures of the first guiding member 3 and the second guiding member 4 can be adjusted adaptively.

[0042] The following is for reference. Figures 2 to 9 The following is a detailed explanation using the example of the first shaft 1 as the moving shaft, the second shaft 2 as the fixed shaft, the first guide member 3 having a guide hole 321, and the second guide member 4 having a guide pin 42.

[0043] Regarding the structure of the first guide member 3, in some embodiments, such as Figure 3 As shown, the first guide member 3 includes a first connecting flange 31 and a guide sleeve 32. The first connecting flange 31 is used to connect to the first shaft 1, and the guide sleeve 32 is located at the center of the first connecting flange 31. A guide hole 321 is formed inside the guide sleeve 32. Positioning the guide sleeve 32 at the center of the first connecting flange 31 facilitates the coaxial distribution of the guide hole 321 with the first shaft 1 after the first connecting flange 31 is coaxially connected. Furthermore, using the guide hole 321 formed inside the guide sleeve 32, compared to directly drilling a hole on the first connecting flange 31 as the guide hole 321, increases the depth of the guide hole 321, thereby increasing the time for the guide pin 42 to move within the guide hole 321 and preventing significant misalignment of the guide pin 42, thus improving the guiding accuracy.

[0044] Regarding the connection method between the guide sleeve 32 and the first connecting flange 31, in a specific embodiment, the first connecting flange 31 has a first through hole 313 at its center, and the guide sleeve 32 is welded firmly inside the first through hole 313. For example... Figure 3 As shown, during the welding process, the top edge of the guide sleeve 32 can be aligned with the top edge of the first through hole 313, allowing the sidewall of the guide sleeve 32 to be welded to the wall of the first through hole 313. This extends the guide sleeve 32 into the interior of the first shaft 1, ensuring a good appearance while preventing it from protruding outwards from the first shaft 1 and affecting the lowering and installation of the second shaft 2. A guide hole 321 is formed inside the guide sleeve 32, the depth of which is approximately equal to the length of the guide sleeve 32. The guide sleeve 32 may or may not have a bottom wall. Regardless of whether it has a bottom wall, the depth of the guide hole 321 is greater than the length of the guide pin 42, facilitating the lowering and installation of the second shaft 2. Furthermore, the opening of the guide sleeve 32 that connects to the first connecting flange 31 has a guide chamfer 322, which serves to guide the guide pin 42 into the guide hole 321.

[0045] Of course, the guide sleeve 32 can also be connected to the first connecting flange 31 in other ways, such as bolt connection, etc.

[0046] Regarding the connection method between the first connecting flange 31 and the first shaft 1, in a specific embodiment, such as Figure 3 As shown, the first connecting flange 31 is provided with a first mounting hole for the first bolt 5 to pass through. The first mounting hole is used for the installation and positioning of the first guide member 3, that is, the first connecting flange 31 is firmly connected to the first shaft 1 by the first bolt 5.

[0047] In a specific application, the end of the first shaft 1 has a shaft end flange, the first mounting hole on the first connecting flange 31 is aligned with the flange hole on the shaft end flange, and the first bolt 5 passes through the first mounting hole and is inserted into the flange hole.

[0048] Of course, the first guide member 3 can also be connected to the first shaft 1 in other ways, such as by using a pin connection, and is not limited to bolt connection.

[0049] In addition, to ensure that the first guide member 3 is coaxially distributed with the first shaft 1, in a specific embodiment, such as... Figure 3 As shown, the first connecting flange 31 has a first stop 311 at the radial outer edge of the surface facing the first shaft 1. The first stop 311 is used to abut against the inner wall of the first shaft 1, which is convenient and quick to align, and the structure is simple, reducing the impact on the structural strength of the first connecting flange 31.

[0050] In practical applications, when assembling the first guide member 3, the first stop 311 is first engaged with the inner edge of the first shaft 1, so that the first stop 311 abuts against the inner wall of the first shaft 1. Then, the first connecting flange 31 is fixed to the first shaft 1 by the first bolt 5. During the tightening of the first bolt 5, due to the cooperation between the first stop 311 and the inner wall of the first shaft 1, the first guide member 3 can be prevented from shaking significantly on the end face of the first shaft 1. This ensures a firm connection and coaxiality.

[0051] In addition, such as Figure 3 As shown, the first connecting flange 31 may also be provided with a second mounting hole 312 for the eye bolt to pass through. This allows the eye bolt to be installed at the second mounting hole 312, facilitating the connection of the eye bolt using a lifting mechanism, and enabling the first guide member 3 to be lifted and installed onto the first shaft 1, thus simplifying the assembly of the first guide member 3.

[0052] In practical applications, there may be multiple second mounting holes 312, such as 3, 4, etc.

[0053] Regarding the structure of the second guide element 4, in some embodiments, such as Figures 4 to 7 As shown, the second guide member 4 includes a second connecting flange 41, which is used to connect with the second shaft 2. A guide pin 42 is located at the center of the second connecting flange 41. Positioning the guide pin 42 at the center of the second connecting flange 41 facilitates a coaxial distribution between the guide pin 42 and the second shaft 2 after the second connecting flange 41 is coaxially connected to the first shaft 1.

[0054] Regarding the connection method of the guide pin 42 and the second connecting flange 41, in a specific embodiment, the guide pin 42 is detachably disposed in the middle of the second connecting flange 41. (Refer to...) Figure 5 As shown, the guide pin 42 is connected to the second connecting flange 41 by screws.

[0055] Furthermore, to connect the guide pin 42 to the middle of the second connecting flange 41, as follows: Figure 6 and Figure 7 As shown, the second connecting flange 41 has a second through hole 413 at its center, and the end face of the guide pin 42 facing away from the guide hole 321 has a third stop 4211, which is used to abut against the inner wall of the second through hole 413. Alignment is convenient and quick, and the structure is simple.

[0056] In specific applications, such as Figure 6 and Figure 7 As shown, the second through hole 413 has radially outwardly extending and circumferentially distributed recesses 414 at the opening facing the guide pin 42. The guide pin 42 has circumferentially distributed limiting bosses on its sidewall, and the limiting bosses and the sidewall of the guide pin 42 form a third stop 4211. When assembling the guide pin 42, the third stop 4211 is engaged at the edge of the second through hole 413, causing the limiting bosses to press into the recesses 414. Then, screws are inserted through the limiting bosses and into the bottom wall of the recesses 414.

[0057] Regarding the structure of the guide pin 42, in a specific embodiment, such as Figure 5 and Figure 7 As shown, the guide pin 42 includes a pin body 421 and multiple guide strips 422. The multiple guide strips 422 are detachably distributed on the outer circumferential surface of the pin body 421 and are used to abut against the inner wall of the guide hole 321. By having multiple detachable guide pins 42 abut against the inner wall of the guide hole 321, direct contact between the guide hole 321 and the pin body 421, thus avoiding wear on the pin body 421, can be effectively prevented. Only the worn guide strips 422 need to be replaced, saving costs. Moreover, it can reduce the contact area between the guide pin 42 and the guide hole 321, reduce friction, and reduce the wear rate of the guide pin 42 and the guide hole 321. In addition, since the guide strip 422 will wear out during use and needs to be replaced when it wears to a certain extent, the guide pin 42 is designed to be detachable from the second connecting flange 41. When the guide strip 422 is replaced, the guide pin 42 can be removed from the second connecting flange 41 and a new guide strip 422 can be made.

[0058] Furthermore, such as Figure 5 and Figure 7 As shown, multiple guide bars 422 are assembled onto pins 421 by screws, and the connection is secure.

[0059] In practical applications, each guide bar 422 has multiple countersunks spaced apart along its length, and the head of the screw is embedded in the countersunk to avoid rubbing against the guide hole 321.

[0060] Furthermore, multiple guide strips 422 are made of fiberglass material. This is a non-metallic material, such as epoxy fiberglass cloth, to avoid scratching the sidewalls of the guide holes 321.

[0061] Furthermore, such as Figure 5and Figure 7 As shown, the outer surface of one end of the multiple guide strips 422 facing the bottom of the guide hole 321 has a guide bevel 4221. This facilitates the insertion of the guide pin 42 into the guide hole 321.

[0062] Furthermore, the surface of the guide strip 422 is an arc surface, which is machined into shape after assembly. The cylindrical contour formed by the arc surface and the guide hole 321 cooperate to achieve guidance during the assembly process.

[0063] In other embodiments, the guide pin 42 may have only a pin body 421 without the guide strip 422, simplifying the structure.

[0064] Regarding the connection method between the second connecting flange 41 and the second shaft 2, in a specific embodiment, such as... Figure 4 As shown, the second connecting flange 41 is provided with a third mounting hole for the second bolt 6 to pass through. The third mounting hole is used for the installation and positioning of the second guide 4, that is, the second connecting flange 41 is connected to the second shaft 2 by the second bolt 6, and the connection is firm.

[0065] In a specific application, the end of the second shaft 2 has a shaft end flange, the third mounting hole on the second connecting flange 41 is aligned with the flange hole on the shaft end flange, and the second bolt 6 passes through the third mounting hole and is inserted into the flange hole.

[0066] Of course, the second guide 4 can also be connected to the second shaft 2 in other ways, such as by using a pin connection, and is not limited to bolt connection.

[0067] In addition, to ensure that the second guide member 4 and the second shaft 2 are coaxially distributed, in a specific embodiment, such as... Figure 4 , Figure 5 and Figure 6 As shown, the second connecting flange 41 has a second stop 412 on its surface edge facing the second shaft 2. The second stop 412 is used to abut against the inner wall of the second shaft 2. This design allows for convenient and quick alignment, and the structure is simple, reducing the impact on the structural strength of the second connecting flange 41.

[0068] In practical applications, when assembling the second guide member 4, the second stop 412 is first engaged with the inner edge of the second shaft 2, so that the second stop 412 abuts against the inner wall of the second shaft 2. Then, the second connecting flange 41 is fixed to the second shaft 2 by the second bolt 6. During the tightening of the second bolt 6, due to the cooperation between the second stop 412 and the inner wall of the second shaft 2, the second guide member 4 can be prevented from shaking significantly on the end face of the second shaft 2. This ensures a firm connection and coaxiality.

[0069] In addition, such as Figure 4 , Figure 6 and Figure 8As shown, a lifting lug 411 is provided on the surface of the second connecting flange 41 facing away from the second shaft 2. This facilitates the use of a lifting mechanism to connect the lifting lug 411, allowing the second guide member 4 to be lifted and installed onto the second shaft 2, thus simplifying the assembly of the second guide member 4. It also facilitates the simultaneous lifting of the connected second guide member 4 and second shaft 2 using the lifting lug 411, allowing the second shaft 2 to be fitted below the outer side of the first shaft 1. This integrates the lifting structure and the guide structure of the shaft system, simplifying the tooling installation process.

[0070] In practical applications, the lifting lug 411 and the second connecting flange 41 are integrally formed or welded together, improving the connection strength. For example... Figure 4 and Figure 6 As shown, there is one lifting lug 411, which is located in the middle of the second connecting flange 41. This facilitates the smooth lifting of the second shaft 2 and prevents the second shaft 2 from being in a skewed position after being lifted, thereby facilitating the quick alignment and connection of the guide pin 42 and the guide hole 321.

[0071] In some embodiments, such as Figure 2 and Figure 8 As shown, the first guide member 3 has multiple concave first notches 33 in the circumferential direction, and the second guide member 4 has multiple concave second notches 43 in the circumferential direction. The first guide member 3 has multiple concave first notches 33 on the end face of the first shaft 1 relative to its outer edge, and the second guide member 4 has multiple concave second notches 43 on the end face of the second shaft 2 relative to its outer edge. Each first notch 33 is connected to a second notch 43, allowing a portion of the end face of the first shaft 1 to be exposed through the first notches 33 and the second notches 43. The notches reduce the weight of the first guide member 3 and the second guide member 4; they also allow the end face of the shaft system to be exposed through the two notches, facilitating direct inspection of whether the bearing meets installation requirements after rotation using measuring tools, without disassembling the guide device. If the inspection fails, rotation can continue under the guidance of the guide device.

[0072] Furthermore, such as Figure 2 and Figure 8 As shown, the number of the first gap 33 and the second gap 43 are the same and they are distributed in a one-to-one correspondence along the axial direction of the first axis 1.

[0073] In a specific embodiment, such as Figures 3 to 6 As shown, the first guide member 3 is cross-shaped on the end face of the first shaft 1, and there are four first notches 33. The second guide member 4 is cross-shaped on the end face of the second shaft 2, and there are four second notches 43.

[0074] Of course, the number of the first gap 33 and the second gap 43 can also be three or five, etc., instead of four.

[0075] Additionally, in this embodiment, reference is made to Figure 2 , Figure 3 , Figure 4 and Figure 8 In both embodiments, the first guide member 3 is positioned at the top of the erected first shaft 1, and the second guide member 4 is positioned at the top of the erected second shaft 2. However, in other embodiments, the mounting position of the first guide member 3 can be changed, see reference... Figure 9 As shown, the first guide member 3 is installed onto the bottom flange 11 of the first shaft 1. The first guide member 3 can serve as a support when the first shaft 1 is placed vertically. With this configuration, the guide sleeve 32 or guide pin 42 needs to be lengthened.

[0076] A second aspect of the present invention provides a method for aligning a wind turbine shaft system, employing an alignment device as described in any of the above embodiments. The alignment method includes: positioning a first shaft 1 vertically; installing a first alignment member 3 onto one end face of the first shaft 1, coaxially distributed with the first shaft 1; positioning a second shaft 2 vertically; installing a second alignment member 4 onto the upper end face of the second shaft 2, coaxially distributed with the second shaft 2; simultaneously lifting the second alignment member 4 and the second shaft 2 and lowering them to their corresponding positions on the first shaft 1, so that the second shaft 2 is fitted onto the outside of the first shaft 1, wherein, during the lowering process, the alignment pin 42 is aligned and inserted into the alignment hole 321. This method offers high alignment accuracy and is convenient and quick to operate.

[0077] As an example, the alignment method further includes applying grease to the alignment hole 321 before simultaneously lifting the second alignment member 4 and the second shaft 2. For example, grease is applied to the alignment hole 321 first, and then the first alignment member 3 is installed onto one end face of the first shaft 1.

[0078] As an example, the steps of installing the first guide member 3 onto one end face of the first shaft 1 include: installing the first guide member 3 onto the upper end face of the first shaft 1. This facilitates observation from above and side view to ensure that the guide pin 42 and the guide hole 321 are aligned. Alternatively, the first guide member 3 can be installed onto the lower end face of the first shaft 1.

[0079] As an example, the steps of installing the second guide member 4 onto the upper end face of the second shaft 2 include: lifting the second guide member 4 and installing the second guide member 4 onto the upper end face of the second shaft 2. In a specific application, a lifting mechanism can be connected to the lifting lug 411 on the second guide member 4 to lift the second guide member 4.

[0080] As an example, the wind turbine shaft system includes bearings, the bearings including a first tapered roller bearing, and before the step of simultaneously lifting the second guide 4 and the second shaft 2, it also includes pre-installing the first outer ring of the first tapered roller bearing on the inner bottom of the second shaft 2, and pre-installing the first tapered roller and the first inner ring of the first tapered roller bearing on the outer bottom of the first shaft 1.

[0081] As an example, the step of simultaneously lifting the second guide member 4 and the second shaft 2 includes: hoisting the second guide member 4 to simultaneously lift the second guide member 4 and the second shaft 2.

[0082] Further, the step of lowering the first shaft 1 includes: when the guide pin 42 moves down to the top opening of the guide hole 321, the guide pin 42 is aligned and inserted into the guide hole 321. At this time, the first outer ring is higher than the first tapered roller and the first inner ring. Then, the second guide member 4 and the second shaft 2 are lowered until the first outer ring is fitted around the outer circumference of the first tapered roller and abuts against the first tapered roller. Since there is still a gap between the first outer ring and the first inner ring when the guide pin 42 is initially inserted into the guide hole 321, during the process of lowering the second shaft 2, the first outer ring, the first tapered roller, and the first inner ring will move closer together in the guiding state of the guide pin 42 and the guide hole 321, which can effectively prevent the first outer ring from colliding with the first tapered roller and damaging the bearing during the process of the second shaft 2 falling. It should be noted that the second shaft 2 can also be lowered directly until the first outer ring abuts against the first tapered roller.

[0083] As an example, after the step of fitting the second shaft 2 onto the outside of the first shaft 1, the method further includes: rotating the second shaft 2 to rotate the first tapered roller bearing, disassembling the guide device, and installing the second tapered roller bearing on top of the first shaft 1 and the second shaft 2.

[0084] Furthermore, after installing the second tapered roller bearing on top of the first shaft 1 and the second shaft 2, the shaft can be rotated again to run in and align the second tapered roller bearing. This completes the assembly of the wind turbine shaft system, ensuring that both tapered roller bearings at the top and bottom of the shaft system can operate smoothly and stably.

[0085] The guiding device and method provided in this application embodiment offer high guiding accuracy, convenient and quick operation, and high guiding efficiency, thereby improving shaft assembly efficiency. Furthermore, during the guiding assembly process, the guiding pin and guiding hole are less likely to collide and be damaged. Additionally, the first outer ring and the first tapered roller can be fitted in the guiding state (i.e., with the guiding pin inserted into the guiding hole), further reducing the risk of the first outer ring colliding and being damaged with the first tapered roller. Moreover, the first tapered roller bearing at the bottom of the shaft can be rotated without disassembling the guiding device. Rotating in the guiding state reduces the number of rotations and disassembly / assembly steps, improving production efficiency. Furthermore, the inclusion of lifting lugs on the second connecting flange allows for an integrated design of the tooling and lifting fixture, simplifying the tooling installation process.

[0086] While embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. It should be understood that, to those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A guiding device for assembling a wind turbine shaft system, the wind turbine shaft system comprising a first shaft (1) and a second shaft (2) sleeved on the outside of the first shaft (1), the first shaft (1) and the second shaft (2) being rotatable relative to each other via a bearing installed between them, characterized in that, The guiding device includes: The first guide member (3) is used to be detachably connected to one end face of the first shaft (1) and is coaxially distributed with the first shaft (1); The second guide member (4) is used to be detachably connected to one end face of the second shaft (2) and is coaxially distributed with the second shaft (2); Among them, one of the first guide member (3) and the second guide member (4) has a guide pin (42) at its center, and the other has a guide hole (321) adapted to the guide pin (42) at its center. When the guide pin (42) is inserted into the guide hole (321), the first shaft (1) and the second shaft (2) are coaxially aligned.

2. The guiding device for wind turbine shaft assembly according to claim 1, characterized in that, The first guiding element (3) includes: The first connecting flange (31) is provided with a first mounting hole for the first bolt (5) to pass through, so that the first connecting flange (31) can be connected to the first shaft (1) by the first bolt (5); A guide sleeve (32) is disposed at the center of the first connecting flange (31), and the guide hole (321) is formed inside the guide sleeve (32).

3. The guiding device for wind turbine shaft assembly according to claim 2, characterized in that, The first connecting flange (31) has a first stop (311) at the radial outer edge of the surface facing the first shaft (1), the first stop (311) being used to abut against the inner wall of the first shaft (1).

4. The guiding device for wind turbine shaft assembly according to claim 2, characterized in that, The first connecting flange (31) is also provided with a second mounting hole (312) for the lifting eye screw to pass through; The first connecting flange (31) has a first through hole (313) at its center, and the guide sleeve (32) is welded into the first through hole (313); The opening of the guide sleeve (32) connected to the first connecting flange (31) has a guide chamfer (322).

5. The guiding device for wind turbine shaft assembly according to claim 1, characterized in that, The second guiding element (4) includes: The second connecting flange (41) has a lifting lug (411) on its surface away from the second shaft (2). The second connecting flange (41) has a third mounting hole for the second bolt (6) to pass through, so that the second connecting flange (41) can be connected to the second shaft (2) by the second bolt (6). The guide pin (42) is located at the center of the second connecting flange (41).

6. The guiding device for wind turbine shaft assembly according to claim 5, characterized in that, The second connecting flange (41) has a second stop (412) on its surface edge facing the second shaft (2), the second stop (412) being used to abut against the inner wall of the second shaft (2).

7. The guiding device for wind turbine shaft assembly according to claim 5, characterized in that, The guide pin (42) is detachably disposed in the middle of the second connecting flange (41); The second connecting flange (41) has a second through hole (413) at its center, and the guide pin (42) has a third stop (4211) on its end face away from the guide hole (321). The third stop (4211) is used to abut against the inner wall of the second through hole (413).

8. The guiding device for wind turbine shaft assembly according to claim 5, characterized in that, The guide pin (42) is connected to the second connecting flange (41) by screws, and the guide pin (42) includes: The pin (421) and a plurality of guide strips (422) are detachably distributed on the outer peripheral surface of the pin (421) and the plurality of guide strips (422) are used to abut against the inner sidewall of the guide hole (321).

9. The guiding device for wind turbine shaft assembly according to claim 8, characterized in that, The plurality of guide strips (422) are made of glass fiber material and are assembled onto the pin (421) by screws; The outer side of one end of each of the guide strips (422) facing the bottom of the guide hole (321) has a guide slope (4221).

10. The guiding device for assembling a wind turbine shaft system according to any one of claims 1 to 9, characterized in that, The first guide member (3) has a plurality of recessed first notches (33) on the end face of the first shaft (1) relative to the outer edge of the first shaft (1), and the second guide member (4) has a plurality of recessed second notches (43) on the end face of the second shaft (2) relative to the outer edge of the second shaft (2). Each first notch (33) is connected to a second notch (43) so that a portion of the end face of the first shaft (1) can be exposed through the first notch (33) and the second notch (43).

11. The guiding device for wind turbine shaft assembly according to claim 10, characterized in that, The number of the first gap (33) and the second gap (43) are the same and they are symmetrically distributed along the axial direction of the first axis (1); The first guide member (3) is cross-shaped on the end face of the first shaft (1), and there are four first notches (33). The second guide member (4) is cross-shaped on the end face of the second shaft (2), and there are four second notches (43).

12. A method for aligning the shaft system of a wind turbine generator, employing the alignment device as described in any one of claims 1 to 11, characterized in that, The correction method includes: Make the first shaft (1) vertical, install the first guide (3) on one end face of the first shaft (1) and distribute it coaxially with the first shaft (1); Make the second shaft (2) vertical, install the second guide (4) onto the upper end face of the second shaft (2), and distribute it coaxially with the second shaft (2); Simultaneously, after lifting the second guide member (4) and the second shaft (2), lower them to the position corresponding to the first shaft (1) so that the second shaft (2) is sleeved on the outside of the first shaft (1). During the lowering process, the guide pin (42) is aligned and inserted into the guide hole (321).

13. The method for guiding the assembly of a wind turbine shaft system according to claim 12, characterized in that, The wind turbine shaft system includes bearings, and the bearings include a first tapered roller bearing; Before the step of simultaneously lifting the second guide (4) and the second shaft (2), the method further includes pre-installing the first outer ring of the first tapered roller bearing on the inner bottom of the second shaft (2), and pre-installing the first tapered roller and the first inner ring of the first tapered roller bearing on the outer bottom of the first shaft (1). The step of simultaneously lifting the second guide member (4) and the second shaft (2) includes: hoisting and connecting the second guide member (4) to simultaneously lift the second guide member (4) and the second shaft (2); The step of lowering the corresponding position of the first shaft (1) includes: when the guide pin (42) moves down to the top opening of the guide hole (321), the guide pin (42) is aligned and inserted into the guide hole (321). At this time, the first outer ring is higher than the first tapered roller and the first inner ring. Then, the second guide member (4) and the second shaft (2) are lowered until the first outer ring is fitted on the outer circumference of the first tapered roller and abuts against the first tapered roller.

14. The method for guiding the assembly of a wind turbine shaft system according to claim 13, characterized in that, The alignment method further includes: applying grease into the alignment hole (321) before simultaneously lifting the second alignment member (4) and the second shaft (2); After the step of fitting the second shaft (2) onto the outside of the first shaft (1), the method further includes: After rotating the second shaft (2) to rotate the first tapered roller bearing, disassemble the guide device and install the second tapered roller bearing on top of the first shaft (1) and the second shaft (2).

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