Pull-rod-free type sleeving tool for wind driven generator and using method thereof

Abstract

The invention relates to the technical field of wind driven generator assembly, in particular to a pull-rod-free type sleeving tool for a wind driven generator and a using method of the pull-rod-free type sleeving tool, and mainly solves the technical problems that an existing sleeving tool for the wind driven generator cannot be suitable for a step-free hollow shaft and is low in assembly quality. The tool comprises a fixing seat suitable for being connected to the bottom end of the bearing assembly, the fixing seat is provided with a supporting part, and the supporting part is provided with a connecting hole; a positioning shaft section used for being sleeved with the top of the bearing assembly in a clearance mode is arranged in the middle of the guiding shaft in the length direction in a protruding mode, a threaded hole is formed in the center of the bottom end of the guiding shaft, and the bottom end of the guiding shaft is used for being supported on the supporting part and is connected to the fixing base through a fastener which penetrates through the connecting hole and is in threaded connection with the interior of the threaded hole; the sliding sleeve is suitable for being connected to the top of the rotor assembly, and the guiding shaft is sleeved with the sliding sleeve in a clearance mode. The tool is also suitable for a hollow shaft without a step structure, and meanwhile, the deflection of the guide shaft can be avoided, so that the assembly quality can be ensured.

Description

Technical Field

[0001] This invention relates to the field of wind turbine assembly technology, and in particular to a wind turbine assembly tooling kit without tie rods and its usage method. Background Technology

[0002] As wind turbines are developing towards higher power and larger size, the magnetic poles of the generators are becoming longer and longer, and the magnetic attraction during assembly is also becoming stronger.

[0003] Existing wind turbine assembly fixtures, such as those described in patent publication number "CN113067440A" entitled "A Fixture for Assembling a Wind Turbine Generator and Its Usage Method," involve placing the stator assembly on a support platform, then installing the bearing assembly, followed by placing the guide shaft on the stepped structure of the hollow shaft of the bearing assembly via a bottom step, and fixing the guide shaft with a tie rod. Finally, the rotor assembly is assembled. This structure has the following drawbacks: First, some existing wind turbine rotor assemblies do not have a stepped structure on the hollow shaft, making it impossible to directly position and fix the guide shaft. Second, the tie rod structure, due to its tensile characteristics, is prone to some degree of skew under magnetic attraction when the generator's magnetic poles are long, reducing the positioning effect of the guide shaft and thus affecting the assembly quality.

[0004] Therefore, there is an urgent need for a tooling kit for wind turbine generators that can be applied to stepless hollow shafts and achieve high assembly quality. Summary of the Invention

[0005] To overcome the technical defects of existing wind turbine generator kits, such as their inability to be applied to stepless hollow shafts and their low assembly quality, this invention provides a wind turbine generator kit without tie rods and its usage method.

[0006] The wind turbine generator rodless kit provided by this invention includes: A mounting base adapted to be connected to the bottom end of a bearing assembly, the mounting base having a horizontally arranged support portion and a connecting hole having a center on the support portion, the connecting hole being coaxially arranged with the bearing assembly; A guide shaft has a positioning shaft section protruding from the middle of its length direction. The positioning shaft section is used to be fitted into the top of the bearing assembly with clearance. The bottom end of the guide shaft has a threaded hole at its center. The bottom end of the guide shaft is used to support the support part and is connected to the fixed seat by a fastener that passes through the connecting hole and is screwed into the threaded hole. A sliding sleeve, adapted to be connected to the top of the rotor assembly, and the sliding sleeve is used to be loosely fitted onto the guide shaft.

[0007] Optionally, the guide shaft includes an upper cylinder, a cylindrical body, and a lower cylinder. The cylindrical body is connected between the upper cylinder and the lower cylinder, and the diameter of the cylindrical body is larger than the outer diameter of the upper cylinder and the outer diameter of the lower cylinder to form the positioning shaft segment. The bottom end of the lower cylinder is sealed by a lower cover, and the threaded hole is located at the center of the lower cover.

[0008] Optionally, the cylinder is welded to both the upper and lower cylinders, and stiffening plates are provided between the cylinder and both the upper and lower cylinders.

[0009] Optionally, the outer surface of the guide shaft and the inner wall of the sliding sleeve are both heat-treated.

[0010] Optionally, multiple mounting bases are configured, and the relative heights of the support portion of different mounting bases to the bottom end of the bearing assembly are different, so as to adapt to bearing assemblies with different axial heights without changing the guide shaft.

[0011] Optionally, the fixing base includes a plurality of first connecting strips evenly distributed along the circumference and a support plate. The first connecting strips are horizontally arranged and have a first through hole at their outer ends. The first connecting strips are connected to the bottom end of the bearing assembly by fasteners that pass through the first through holes and are screwed to the bearing assembly. The upper surface of the inner end of the first connecting strips is provided with a semi-closed first slot. The support plate is engaged with the first slots of all the first connecting strips and forms the support portion. The upper surface of the support plate is higher than the first connecting strips and is fitted into the inner hole of the bearing assembly with a gap.

[0012] Optionally, the fixing base includes a plurality of second connecting strips evenly distributed circumferentially and a support barrel. The second connecting strips are horizontally arranged and have a semi-enclosed second slot at their outer end. The bottom of the second slot has a second through hole. The second connecting strip is limited to the bottom end of the bearing assembly by the second slot and is connected to the bottom end of the bearing assembly by fasteners that pass through the second through hole and are screwed to the bearing assembly. The support barrel is connected to the lower inner end of all the second connecting strips and has its opening facing upward. The bottom of the support barrel forms the support part.

[0013] Optionally, the upper surface of the support is provided with a positioning groove for accommodating the bottom end of the guide shaft. The connecting hole is located at the center of the bottom of the positioning groove. Multiple guide blocks are evenly distributed circumferentially on the outer edge of the positioning groove. The guide blocks are provided with guiding slopes to guide the guide shaft into the positioning groove.

[0014] Optionally, the edge of the positioning groove is provided with an observation hole.

[0015] The method of using the wind turbine rodless kit provided by this invention includes the following steps: S1. Place the stator assembly in place; S2. Connect the bearing assembly to the stator assembly and ensure coaxiality; S3. Install the guide shaft: First, connect the fixed seat to the bottom of the bearing assembly. Then, lift the guide shaft and keep it vertical. Move it to the top of the bearing assembly and then lower the guide shaft smoothly until the bottom of the guide shaft contacts the fixed seat and the positioning shaft section of the guide shaft is fitted into the top of the bearing assembly. Finally, tighten the fastener from the bottom of the fixed seat, so that the fastener passes through the connecting hole and is screwed into the threaded hole of the guide shaft. S4. Connect the sliding sleeve to the rotor assembly and ensure coaxiality; S5. Stator and rotor assembly: First, lift the integral structure formed by the rotor assembly and the sliding sleeve, then move it directly above the guide shaft, and then lower the integral structure smoothly until the sliding sleeve is fitted onto the guide shaft. Finally, continue to lower it until the rotor assembly is fitted into the stator assembly. S6. Assemble the stator assembly and rotor assembly; S7. Remove the sliding sleeve, guide shaft and fixing seat in sequence.

[0016] The technical solution provided by this invention has the following advantages compared with the prior art: The wind turbine generator set provided by this invention features a guide shaft that rests directly on a fixed base at the bottom of the bearing assembly. On one hand, a central positioning shaft section with a clearance fit to the top of the bearing assembly ensures coaxiality; on the other hand, fasteners penetrating the fixed base and screwed to its bottom ensure reliable connection. These two aspects work together to maintain good stability between the guide shaft and the bearing assembly. This fixture has no special requirements for the hollow shaft structure of the bearing assembly and is also applicable to hollow shafts without steps. Furthermore, the direct support of the guide shaft on the fixed base, combined with the aforementioned two design aspects, prevents guide shaft misalignment, thereby ensuring the assembly quality of the stator and rotor assemblies. It is particularly suitable for wind turbine generators with long magnetic poles. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This diagram illustrates the usage state of the tooling kit in Embodiment 1 of the present invention. Figure 2 This diagram illustrates the structure of the fixing base in Embodiment 1 of the present invention. Figure 3 This is a cross-sectional schematic diagram of the fixing base in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the guide shaft in Embodiment 1 of the present invention; Figure 5 This is a cross-sectional schematic diagram of the guide shaft in Embodiment 1 of the present invention; Figure 6 This diagram illustrates the structure of the sliding sleeve in Embodiment 1 of the present invention. Figure 7 This is a cross-sectional schematic diagram of the sliding sleeve in Embodiment 1 of the present invention; Figure 8 This diagram illustrates the usage state of the tooling kit in Embodiment 2 of the present invention. Figure 9 This diagram illustrates the structure of the fixing base in Embodiment 2 of the present invention. Figure 10 This is a cross-sectional schematic diagram of the fixing seat in Embodiment 2 of the present invention.

[0020] In the picture: 1. Fixed base; 11. Connecting hole; 12. First connecting strip; 121. First through hole; 122. First slot; 13. Support plate; 14. Second connecting strip; 141. Second slot; 142. Second through hole; 15. Support barrel; 151. Observation window; 16. Positioning groove; 17. Guide block; 18. Observation hole; 19. Reinforcing rib; 2. Guide shaft; 21. Positioning shaft section; 22. Threaded hole; 23. Upper cylinder; 24. Lower cylinder; 25. Rib; 26. Conical structure; 3. Sliding sleeve; 31. Base plate; 32. Sleeve; 33. Reinforcing rib; 100. Stator assembly; 200. Bearing assembly; 210. Hollow shaft; 220. Snap ring; 300. Rotor assembly; 310. Flange. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0022] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the invention, but the invention may also be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the invention, and not all embodiments.

[0024] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1

[0025] Reference Figures 1 to 7 This embodiment provides a wind turbine generator tie rod-free kit, including a fixed base 1, a guide shaft 2 and a sliding sleeve 3.

[0026] The fixing seat 1 is adapted to be connected to the bottom end of the bearing assembly 200. The fixing seat 1 has a horizontally arranged support part and a connecting hole 11 is provided in the center of the support part. The connecting hole 11 is coaxially arranged with the bearing assembly 200.

[0027] Specifically, the fixing base 1 includes a plurality of first connecting strips 12 evenly distributed along the circumference and a support plate 13. The first connecting strips 12 are arranged horizontally and have a first through hole 121 at their outer ends. The first connecting strips 12 are connected to the bottom end of the bearing assembly 200 by fasteners that pass through the first through hole 121 and are screwed to the bearing assembly 200. The upper surface of the inner end of the first connecting strip 12 is provided with a semi-closed first slot 122. The support plate 13 is clamped on the first slots 122 of all the first connecting strips 12 and forms a support part. The upper surface of the support plate 13 is higher than the first connecting strips 12 and is fitted into the inner hole of the bearing assembly 200 with a gap.

[0028] It is easy to understand that the support plate 13 is circular, and the first slots 122 of all the first connecting strips 12 together form a circular mounting part that matches the outline of the support plate 13. The support part is located in the circular mounting part, thus realizing the clamping support of the support plate 13 on the first connecting strip 12.

[0029] More specifically, the number of first connecting strips 12 is not limited; for example, in this embodiment, there are four first connecting strips 12.

[0030] It should be noted that the bearing assembly 200 includes a bearing, a hollow shaft 210 located inside the bearing, and a retaining ring 220 located below the inner ring of the bearing. The retaining ring 220 is fixedly connected to the hollow shaft 210. A threaded hole is provided on the lower end face of the hollow shaft 210. Fasteners are threaded into the threaded hole of the hollow shaft 210 after passing through the first through hole 121 and the retaining ring 220, thus connecting the first connecting strip 12 to the bottom end of the bearing assembly 200. Fasteners such as bolts and screws with external threads are acceptable. The support plate 13 is fitted into the inner hole of the retaining ring 220 with a gap to ensure the coaxiality of the support plate 13 and the bearing assembly 200, facilitating smooth assembly.

[0031] It should be noted that there is no paint anti-corrosion layer at the mating point between the inner hole of the retaining ring 220 and the support plate 13, and there is also no paint anti-corrosion layer at the mating point between the hollow shaft 210 and the positioning shaft section 21 of the guide shaft 2.

[0032] More specifically, the support plate 13 also has multiple threaded lifting holes evenly distributed circumferentially, and each lifting hole has a corresponding process hole on its side. The threaded lifting holes are used to connect the lifting rings to facilitate the lifting and transfer of the fixed base 1. The process holes are used for observation and to facilitate the disassembly of the lifting rings by the operators.

[0033] Furthermore, the upper surface of the support plate 13 is provided with a positioning groove 16 for accommodating the bottom end of the guide shaft 2. The connecting hole 11 is located at the center of the bottom of the positioning groove 16. Multiple guide blocks 17 are evenly distributed circumferentially on the outer edge of the positioning groove 16. The guide blocks 17 are provided with guiding slopes to guide the guide shaft 2 into the positioning groove 16. When the guide shaft 2 is installed, the bottom end of the guide shaft 2 falls smoothly into the positioning groove 16 under the action of the guiding slopes of the guide blocks 17. The bottom sidewall of the guide shaft 2 cooperates with the groove wall stop of the positioning groove 16, which on the one hand plays a limiting role, improves the relative stability of the guide shaft 2 and the support plate 13, and on the other hand helps to ensure the coaxiality of the guide shaft 2 and the support plate 13.

[0034] Furthermore, the edge of the positioning groove 16 is provided with observation holes 18. The descent process of the guide shaft 2 can be monitored through the observation holes 18 to ensure that the guide shaft 2 is in contact with the support plate 13 and falls into place. The number of observation holes 18 is not limited; for example, this embodiment provides two observation holes 18.

[0035] The guide shaft 2 has a positioning shaft section 21 protruding in the middle of its length direction. The positioning shaft section 21 is used to be fitted into the top of the bearing assembly 200 with a gap. The bottom end of the guide shaft 2 has a threaded hole 22 at its center. The bottom end of the guide shaft 2 is used to support the support part and is connected to the fixed seat 1 through the through connection hole 11 and screwed into the threaded hole 22.

[0036] It should be noted that the inner diameter of the sliding sleeve 3 connected to the rotor assembly 300 is not the same as that of the hollow shaft 210. Therefore, when the guide shaft 2 is directly placed on the fixed seat 1, it is difficult to ensure the stability of the guide shaft 2 when it is connected to the fixed seat 1 at the lower end of the guide shaft 2, which presents a certain technical obstacle. This invention overcomes the aforementioned technical obstacle by innovatively designing the guide shaft 2 and adding a positioning shaft section 21 in the middle of the guide shaft 2. This also makes it easier to ensure the coaxiality of the guide shaft 2 and the bearing assembly 200.

[0037] Specifically, the guide shaft 2 includes an upper cylinder 23, a cylinder, and a lower cylinder 24. The cylinder connects the upper cylinder 23 and the lower cylinder 24, and the diameter of the cylinder is larger than the outer diameter of both the upper cylinder 23 and the lower cylinder 24 to form a positioning shaft section 21. The bottom end of the lower cylinder 24 is sealed by a lower cover, and a threaded hole 22 is located at the center of the lower cover. Both the upper cylinder 23 and the lower cylinder 24 of the guide shaft 2 are hollow structures, which can reduce the weight of the tooling and is more suitable for the support method where the guide shaft 2 rests directly on the fixed base 1. The positioning shaft section 21 is formed by a solid cylinder, and the clearance fit between the cylinder and the hollow shaft 210 provides stronger stability and is more conducive to ensuring coaxiality.

[0038] More specifically, the cylinder is welded to both the upper cylinder 23 and the lower cylinder 24, and stiffening plates 25 are provided between the cylinder and both the upper cylinder 23 and the lower cylinder 24. The combination of welding and stiffening plates 25 can improve the overall structural strength of the guide shaft 2, effectively preventing deformation while meeting the requirements of lightweight design.

[0039] More specifically, the top of the upper cylinder 23 is sealed by a top cover, forming a conical structure 26. The conical structure 26 serves as a guide, facilitating the insertion of the sliding sleeve 3. In detail, a threaded lifting hole can be made in the center of the conical structure 26, and a lifting ring can be installed inside the threaded lifting hole for hoisting the guide shaft 2 during installation and disassembly.

[0040] More specifically, the outer surface of the guide shaft 2 is heat-treated to improve its mechanical strength and wear resistance.

[0041] The sliding sleeve 3 is adapted to be connected to the top of the rotor assembly 300, and the sliding sleeve 3 is used to be fitted onto the guide shaft 2 with clearance.

[0042] Specifically, the inner wall of the sliding sleeve 3 undergoes heat treatment to improve its mechanical strength and wear resistance. When the heat-treated sliding sleeve 3 is assembled with the heat-treated guide shaft 2, it is unnecessary to install the non-metallic lining strip located on the inner wall of the sliding sleeve 3 as in the existing scheme. This avoids the occurrence of foreign objects in the generator caused by the lining strip falling off due to impact, and also eliminates the influence of the elastic deformation of the lining strip itself on the coaxiality of the stator assembly 100 and the rotor assembly 300.

[0043] It should be noted that the structure of the sliding sleeve 3 can be achieved using existing technology, namely: the sliding sleeve 3 includes a base 31 and a sleeve 32 fixed on the base 31. The base 31 is connected to the flange 310 of the rotor assembly 300. The sleeve 32 is fitted onto the guide shaft 2 with a gap. A reinforcing rib 33 is provided between the sliding sleeve 3 and the base 31. A ring of mounting holes is opened around the edge of the base 31 in the circumferential direction. The base 31 is fixed by fasteners that pass through the mounting holes and are screwed onto the flange 310. A ring of guide holes is provided around the sleeve 32 on the base 31. The guide holes are used to ensure the coaxiality of the base 31 and the hollow shaft 210 by inserting and screwing a guide rod to the upper end face of the hollow shaft 210 when mounting the rotor assembly 300, thereby ensuring the coaxiality of the rotor assembly 300 and the stator assembly 100.

[0044] In addition, it should be noted that the tooling kit in this embodiment can be made of metal material, and the specific model is not limited. For example, this embodiment uses 40CrMoNi, which can be heat treated and has relatively high strength.

[0045] The method of using the wind turbine rodless kit in this embodiment includes the following steps: S1. Place the stator assembly 100 into position; In order to facilitate the tightening of the fastener at the center of the fixed seat 1, a support platform is generally provided. The stator assembly 100 can be placed and fixed on the support platform.

[0046] S2. Connect the bearing assembly 200 to the stator assembly 100 and ensure coaxiality; During installation, the bearing assembly 200 is supported on the stator assembly 100 by the convex ring on its outer side wall, and is positioned by the contact between the outer side wall of the bearing assembly 200 and the inner wall of the stator assembly 100. Of course, in order to ensure assembly accuracy, multiple first guide rods can be evenly distributed circumferentially on the stator assembly 100, and multiple first guide holes can be opened on the convex ring of the bearing assembly 200 corresponding to the first guide rods. The bearing assembly 200 is lifted and leveled, and after the direction is aligned, it is slowly lowered. The first guide rods are inserted into the first guide holes, and then the bearing assembly 200 is gently shaken to observe whether there is any jamming between the bearing assembly 200 and the guide rods. If there is jamming, check whether the lifting point is in the center of the circumference. After it is lowered into place, the bearing assembly 200 and the stator assembly 100 are firmly connected.

[0047] S3. Install guide shaft 2: First, connect the fixed seat 1 to the bottom of the bearing assembly 200. Then, lift the guide shaft 2 and keep it vertical. Move it to the top of the bearing assembly 200. Then, lower the guide shaft 2 smoothly until the bottom of the guide shaft 2 contacts the fixed seat 1 and the positioning shaft section 21 of the guide shaft 2 is fitted into the top of the bearing assembly 200. Finally, tighten the fastener from the bottom of the fixed seat 1 so that the fastener passes through the connecting hole 11 and is screwed into the threaded hole 22 of the guide shaft 2.

[0048] S4. Connect the sliding sleeve 3 to the rotor assembly 300 and ensure coaxiality; The sliding sleeve 3 is fixed to the flange 310 of the rotor assembly 300 by bolts passing through its mounting hole.

[0049] S5. Stator and rotor assembly: First, lift the integral structure formed by the rotor assembly 300 and the sliding sleeve 3, then move it to the top of the guide shaft 2, and then lower the integral structure smoothly until the sliding sleeve 3 is fitted onto the guide shaft 2 with a gap. Finally, continue to lower it until the rotor assembly 300 is assembled into the stator assembly 100. To ensure the assembly accuracy of the stator assembly 100 and the rotor assembly 300, multiple second guide rods can be evenly distributed circumferentially on the upper end face of the hollow shaft 210. Multiple second guide holes are opened on the chassis 31 and flange 310 corresponding to the second guide rods. The entire structure is lifted and leveled, and after the direction is aligned, it is slowly lowered. The second guide rods are inserted into the second guide holes, and the lowering continues until the rotor assembly 300 is in place. When the rotor assembly 300 falls, the conical structure at the top of the guide shaft 2 helps the sliding sleeve 3 and the guide shaft 2 to be concentrically aligned, which can improve assembly efficiency and reduce collisions.

[0050] S6. Assemble the stator assembly 100 and the rotor assembly 300.

[0051] S7. Remove the sliding sleeve 3, guide shaft 2 and fixed seat 1 in sequence. Example 2

[0052] Reference Figures 8 to 10 This embodiment provides a rodless assembly for a wind turbine, including a fixed base 1, a guide shaft 2, and a sliding sleeve 3. The only difference between this embodiment and Embodiment 1 is the structure of the fixed base 1.

[0053] It should be noted that the axial dimension of the bearing assembly 200 of some wind turbines is relatively short. If the guide shaft 2 described in Embodiment 1 is still used, the lower end of the guide shaft 2 will extend outward below the bearing assembly 200. Therefore, this embodiment designs a concave fixing seat 1 to meet the requirements of this model without replacing the guide shaft 2.

[0054] Specifically, the fixing base 1 includes a plurality of second connecting strips 14 evenly distributed along the circumference and a support barrel 15. The second connecting strips 14 are arranged horizontally and have a semi-closed second slot 141 at their outer ends. The bottom of the second slot 141 has a second through hole 142. The second connecting strips 14 are limited to the bottom end of the bearing assembly 200 through the second slot 141 and are connected to the bottom end of the bearing assembly 200 by fasteners that pass through the second through hole 142 and are screwed to the bearing assembly 200. The support barrel 15 is connected to the lower inner ends of all the second connecting strips 14 and has its opening facing upward. The bottom of the support barrel 15 forms a support part.

[0055] More specifically, the bottom surface of the support barrel 15 is also provided with a positioning groove 16 and a guide block 17. The specific structure and function will not be described in detail here.

[0056] Furthermore, a reinforcing rib plate 19 is connected between the second connecting strip plate 14 and the support barrel 15 to ensure the connection strength; an observation window 151 is provided on the barrel wall of the support barrel 15 to observe the cooperation between the guide shaft 2 and the fixed seat 1, and also to reduce the weight of the fixed seat 1.

[0057] The method of using the wind turbine rodless kit in this embodiment is the same as that in Embodiment 1, and will not be repeated here.

[0058] It should be noted that the fixing seat 1 described in Embodiment 1 is suitable for bearing assemblies 200 with a higher axial height, while the fixing seat 1 described in Embodiment 2 is suitable for bearing assemblies 200 with a lower axial height. In actual use, this tooling can be configured with multiple fixing seats 1, including but not limited to the two embodiments described above. The relative height between the support portion of different fixing seats 1 and the bottom end of the bearing assembly 200 is different, so as to adapt to bearing assemblies 200 with different axial heights without replacing the guide shaft 2, thereby improving the versatility of the guide shaft 2.

[0059] The above are merely specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and they should all be covered within the protection scope of the claims.

Claims

1. A rodless assembly for wind turbine generators, characterized in that, include: A fixing seat (1) is adapted to be connected to the bottom end of the bearing assembly (200). The fixing seat (1) has a horizontally arranged support portion and a connecting hole (11) is provided at the center of the support portion. The connecting hole (11) is coaxially arranged with the bearing assembly (200). The guide shaft (2) has a positioning shaft section (21) protruding in the middle of its length direction. The positioning shaft section (21) is used to be fitted into the top of the bearing assembly (200) with clearance. The bottom end of the guide shaft (2) has a threaded hole (22) at its center. The bottom end of the guide shaft (2) is used to support the support part and is connected to the fixed seat (1) by a fastener that passes through the connecting hole (11) and is screwed into the threaded hole (22). A sliding sleeve (3) is adapted to be connected to the top of the rotor assembly (300) and the sliding sleeve (3) is used to be fitted with the guide shaft (2) with clearance.

2. The wind turbine generator tie rod-free tooling kit according to claim 1, characterized in that, The guide shaft (2) includes an upper cylinder (23), a cylinder and a lower cylinder (24). The cylinder is connected between the upper cylinder (23) and the lower cylinder (24), and the diameter of the cylinder is greater than the outer diameter of the upper cylinder (23) and the outer diameter of the lower cylinder (24) to form the positioning shaft section (21). The bottom end of the lower cylinder (24) is sealed by a lower cover, and the threaded hole (22) is located at the center of the lower cover.

3. The wind turbine generator tie rod-free tooling kit according to claim 2, characterized in that, The cylinder is welded to the upper cylinder (23) and the lower cylinder (24), and stiffening plates (25) are provided between the cylinder and the upper cylinder (23) and the lower cylinder (24).

4. The wind turbine generator tie rod-free tooling kit according to claim 1, characterized in that, The outer surface of the guide shaft (2) and the inner wall of the sliding sleeve (3) are both heat-treated.

5. The wind turbine generator tie rod-free tooling kit according to claim 1, characterized in that, Multiple fixed seats (1) are provided, and the relative heights of the support parts of different fixed seats (1) and the bottom of the bearing assembly (200) are different so as to adapt to bearing assemblies (200) with different axial heights without replacing the guide shaft (2).

6. The wind turbine generator tie rod-free tooling kit according to claim 5, characterized in that, The fixing base (1) includes a plurality of first connecting strips (12) evenly distributed along the circumference and a support plate (13). The first connecting strips (12) are arranged horizontally and have a first through hole (121) at their outer ends. The first connecting strips (12) are connected to the bottom end of the bearing assembly (200) by fasteners that pass through the first through hole (121) and are screwed to the bearing assembly (200). The upper surface of the inner end of the first connecting strips (12) is provided with a semi-closed first slot (122). The support plate (13) is clamped on the first slots (122) of all the first connecting strips (12) and forms the support part. The upper surface of the support plate (13) is higher than the first connecting strips (12) and is fitted into the inner hole of the bearing assembly (200) with a gap.

7. The wind turbine generator tie rod-free tooling kit according to claim 5, characterized in that, The fixed base (1) includes a plurality of second connecting strips (14) evenly distributed along the circumference and a support barrel (15). The second connecting strips (14) are arranged horizontally and have a semi-closed second slot (141) at their outer ends. The bottom of the second slot (141) has a second through hole (142). The second connecting strips (14) are limited to the bottom end of the bearing assembly (200) through the second slot (141) and are connected to the bottom end of the bearing assembly (200) by fasteners that pass through the second through hole (142) and are screwed to the bearing assembly (200). The support barrel (15) is connected to the lower inner end of all the second connecting strips (14) and the barrel opening faces upward. The bottom of the support barrel (15) forms the support part.

8. The wind turbine generator tie rod-free tooling according to any one of claims 5 to 7, characterized in that, The upper surface of the support is provided with a positioning groove (16) for accommodating the bottom end of the guide shaft (2). The connecting hole (11) is located at the center of the bottom of the positioning groove (16). Multiple guide blocks (17) are evenly distributed circumferentially on the outer edge of the positioning groove (16). The guide block (17) is provided with a guiding slope to guide the guide shaft (2) into the positioning groove (16).

9. The wind turbine generator tie rod-free tooling kit according to claim 8, characterized in that, The edge of the positioning groove (16) is provided with an observation hole (18).

10. A method of using the wind turbine generator tie rod-free tooling kit according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Place the stator assembly (100) into position; S2. Connect the bearing assembly (200) to the stator assembly (100) and ensure coaxiality; S3. Install guide shaft (2): First, connect the fixed seat (1) to the bottom of the bearing assembly (200). Then, lift the guide shaft (2) and keep it vertical. Move it to the top of the bearing assembly (200). Then, let the guide shaft (2) descend smoothly until the bottom of the guide shaft (2) contacts the fixed seat (1) and the positioning shaft section (21) of the guide shaft (2) is fitted into the top of the bearing assembly (200). Finally, tighten the fastener from the bottom of the fixed seat (1) so that the fastener passes through the connecting hole (11) and is screwed into the threaded hole (22) of the guide shaft (2). S4. Connect the sliding sleeve (3) to the rotor assembly (300) and ensure coaxiality; S5. Stator and rotor assembly: First, lift the integral structure formed by the rotor assembly (300) and the sliding sleeve (3), then move it to the top of the guide shaft (2), and then lower the integral structure smoothly until the sliding sleeve (3) is fitted onto the guide shaft (2) with a gap. Finally, continue to lower it until the rotor assembly (300) is fitted into the stator assembly (100). S6. Assemble the stator assembly (100) and the rotor assembly (300); S7. Remove the sliding sleeve (3), guide shaft (2) and fixed seat (1) in sequence.

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