Wind power hollow main shaft rigid reinforcing sleeve
Patent Information
- Application Number
- CN202522649691.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-12-15
AI Technical Summary
在风力发电机轻量化与成本优化的大环境下，在现实使用中，发电机空心主轴因过度轻量化设计造成主轴刚性不足，变形过大，在局部产生较高的应力幅，使轴的旋转精度下降和振动加剧，显著降低主轴的疲劳寿命；且造成和配套轴承之间过盈量不足、游隙过大的情况，使轴承承受设计之外的边缘载荷，从而削弱主轴支承刚性，造成轴承润滑不良，产生高温，缩短轴承使用寿命；发电机空心主轴刚性不足大大增加风力发电机的故障率如主轴疲劳损坏、轴承磨损加剧、齿轮箱损坏等
[0016]将本实用新型设置于风力发电机空心主轴内轴承相应的位置，通过调节第一螺栓、第三螺栓的松紧实现调节外环与第一内环之间的配合间隙，以及外环与第二内环之间的配合间隙，使外环与第一内环、第二内环、第三内环之间的锥面发生相应的轴向位移和径向挤压，使外环的外径胀大，带动风力发电机空心主轴相应位置内径、外径胀大，在提高空心主轴相应位置刚性的同时，使风力发电机空心主轴与轴承配合的过盈量变大，将轴承游隙调整到理想的设计状态，提高了轴承的使用寿命，避免了风力发电机空心主轴因刚性不足、与轴承配合过盈量不足造成的更换；本实用新型重量轻，可操作性强，安装成本低，远远低于风力发电机空心主轴的更换费用，经济性好。
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Figure CN224786208U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind turbines, in particular to a rigidity reinforcing sleeve for a hollow main shaft of wind power. Background Art
[0002] As an important part of global clean energy, wind power generation has developed rapidly in recent years, with continuous technological progress and continuous expansion of application fields, and the trend of large-scale, lightweight and intelligent wind turbines is accelerating. The wind turbine in the prior art is huge in size, and the weight of the generator main shaft still reaches dozens of tons even if a hollow shaft is adopted. The matching bearing of the generator main shaft has large size and heavy weight, so that both the generator main shaft and the matching bearing have high manufacturing cost. Under the general environment of lightweight and cost optimization of wind turbines, in practical application, excessive lightweight design of the hollow generator main shaft results in insufficient rigidity of the main shaft, excessive deformation and high stress amplitude generated locally, which reduces the rotation precision of the shaft, intensifies vibration, and significantly reduces the fatigue life of the main shaft; it also causes the problems of insufficient interference and excessive play between the main shaft and the matching bearing, so that the bearing bears edge load beyond the design, thereby weakening the supporting rigidity of the main shaft, causing poor lubrication of the bearing, generating high temperature, and shortening the service life of the bearing; insufficient rigidity of the hollow generator main shaft greatly increases the failure rate of the wind turbine, such as fatigue damage of the main shaft, aggravated bearing wear, gearbox damage and the like. However, redesigning, manufacturing and replacing the hollow generator main shaft have poor economy, which brings great economic burden to users, and has large replacement workload and poor operability. Summary of the Invention
[0003] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the utility model is to provide a rigidity reinforcing sleeve for a wind power hollow main shaft, which can locally increase the rigidity and outer diameter of the hollow main shaft of a wind turbine, adjust and reduce bearing play, has light weight, strong operability and good economy, so as to overcome the above-mentioned defects in the prior art.
[0004] In order to solve the above technical problem, the utility model provides a rigidity reinforcing sleeve for a wind power hollow main shaft, comprising an outer ring, a first inner ring, a second inner ring and a third inner ring;
[0005] The outer wall of the outer ring is in clearance fit with the inner wall of the wind power hollow main shaft; a circle of flange is arranged on the inner hole of the outer ring, the first inner ring is arranged on one side of the flange of the inner hole of the outer ring, and the second inner ring and the third inner ring are arranged on the other side of the flange of the inner hole of the outer ring;
[0006] The outer wall of the first inner ring and the inner wall of the outer ring are fitted by a tapered surface, and a fitting gap is provided between one end face of the first inner ring and the flange of the outer ring; the flange of the outer ring is provided with a plurality of first threaded holes, and the first inner ring is provided with a plurality of second through holes corresponding to the plurality of first threaded holes on the flange of the outer ring; the first inner ring is connected to the outer ring by a plurality of first bolts passing through its second through holes and fitting with the first threaded holes of the outer ring.
[0007] The second inner ring and the third inner ring are fixed together by multiple pin connectors and multiple second bolts. The outer walls of the second inner ring and the third inner ring are fitted with the inner wall of the outer ring by a tapered surface. A fitting gap is provided between the outer end face of the second inner ring and the other end face of the outer ring flange. Multiple second threaded holes are provided on the outer end face of the second inner ring. Multiple first through holes are provided on the flange of the outer ring corresponding to the multiple second threaded holes on the outer end face of the second inner ring. The outer ring is connected to the second inner ring by multiple third bolts that pass through its first through holes and fit with the second threaded holes of the second inner ring.
[0008] Preferably, the outer ring is formed by splicing at least two fan-shaped outer ring petals, and each adjacent splicing surface is connected by a mortise and tenon structure; the second inner ring is formed by splicing at least two fan-shaped second inner ring petals, and each adjacent splicing surface is connected by a mortise and tenon structure; the splicing seams of the outer ring petals are staggered from the splicing seams of the second inner ring petals.
[0009] Preferably, the first inner ring is formed by splicing at least two fan-shaped first inner ring petals, and each adjacent splicing surface is connected by a mortise and tenon structure; the third inner ring is formed by splicing at least two fan-shaped third inner ring petals, and each adjacent splicing surface is connected by a mortise and tenon structure; the splicing seams of the first inner ring petals are staggered from the splicing seams of the outer ring petals, and the splicing seams of the third inner ring petals are staggered from the splicing seams of the second inner ring petals.
[0010] Preferably, the outer end face of the third inner ring is provided with multiple support plates, which are respectively located at each splice seam of the third inner ring petal, and the outer side of the multiple support plates is fitted with the inner wall of the wind turbine hollow main shaft with a small clearance.
[0011] Preferably, each of the first inner ring petals has at least two first disassembly threaded through holes on its end face.
[0012] Preferably, each of the third inner ring petals has at least two second disassembly threaded through holes on its end face.
[0013] Preferably, the plurality of first threaded holes on the outer ring flange are all through holes.
[0014] Preferably, a stop structure for radial and axial positioning is provided between the two contact surfaces of the second inner ring and the third inner ring.
[0015] As described above, the rigid reinforcing sleeve for the hollow main shaft of this utility model has the following beneficial effects:
[0016] This invention is installed at the corresponding position of the bearing inside the hollow main shaft of a wind turbine. By adjusting the tightness of the first and third bolts, the fit clearance between the outer ring and the first inner ring, as well as the fit clearance between the outer ring and the second inner ring, is adjusted. This causes corresponding axial displacement and radial compression of the conical surfaces between the outer ring and the first, second, and third inner rings, resulting in an expansion of the outer diameter of the outer ring. This, in turn, causes an expansion of the inner and outer diameters of the corresponding position on the hollow main shaft of the wind turbine. This improves the rigidity of the corresponding position on the hollow main shaft and increases the interference fit between the hollow main shaft and the bearing, adjusting the bearing clearance to the ideal design state. This extends the service life of the bearing and avoids replacement of the hollow main shaft due to insufficient rigidity or insufficient interference fit with the bearing. This invention is lightweight, highly operable, and has low installation costs, far lower than the replacement cost of the hollow main shaft of the wind turbine, making it economical.
[0017] The segmented design of the outer ring and each inner ring greatly reduces the weight of individual parts and makes the parts much smaller, thus making the transportation and installation of this utility model simple and easy at high altitudes.
[0018] The support plate makes the assembly of the third inner ring simple, easy, and safe, providing safety support for the overall installation of subsequent inner and outer rings.
[0019] The setting of the first disassembly threaded through hole on the first inner ring lobe, the second disassembly threaded through hole on the third inner ring lobe, and the setting of multiple first threaded through holes on the outer ring flange facilitates the adjustment of the interference fit between the hollow main shaft of the wind turbine and the bearing, allows the bearing clearance to be adjusted, and also allows the relative position between the outer ring and each inner ring to be locked after adjustment.
[0020] The design of the stop structure between the second and third inner rings ensures good alignment and facilitates installation. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1This is a structural schematic diagram of the exploded state of an embodiment of the present invention;
[0023] Figure 2 This is a front view schematic diagram of an embodiment of the present utility model;
[0024] Figure 3 This is a side sectional view of an embodiment of the present utility model;
[0025] Figure 4 This is a rear view schematic diagram of an embodiment of the present utility model;
[0026] Figure 5 This is a three-dimensional structural diagram of the outer ring of an embodiment of the present utility model;
[0027] Figure 6 This is a three-dimensional structural diagram of the first inner ring according to an embodiment of the present utility model;
[0028] Figure 7 This is a three-dimensional structural diagram of the second inner ring according to an embodiment of the present utility model;
[0029] Figure 8 This is a three-dimensional structural diagram of the third inner ring according to an embodiment of the present invention.
[0030] Component designation explanation:
[0031] 100. Outer ring; 101. Flange; 102. First threaded hole; 103. First through hole; 110. Outer ring lobe; 200. First inner ring; 201. Second through hole; 202. First threaded through hole for disassembly; 203. Stepped hole; 210. First inner ring lobe; 300. Second inner ring; 301. Second threaded hole; 302. First pin mounting hole; 303. Third threaded hole; 304. Groove; 310. Second inner ring lobe; 340. Stop structure; 400. Third inner ring; 401. Second threaded through hole for disassembly; 402. Third through hole; 403. Second pin mounting hole; 404. Fourth threaded hole; 405. Boss; 410. Third inner ring lobe; 500. First bolt; 600. Pin connector; 700. Second bolt; 800. Third bolt; 900, Support plate; 910, Fourth bolt; 920, Mortise and tenon structure. Detailed Implementation
[0032] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0033] Please see Figures 1 to 8It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0034] The rigid reinforcing sleeve of the hollow main shaft of the wind turbine of this utility model will be described in detail below through specific embodiments.
[0035] like Figure 1 , Figure 3 As shown, a rigid reinforcing sleeve for a hollow wind turbine main shaft includes an outer ring 100, a first inner ring 200, a second inner ring 300, and a third inner ring 400.
[0036] The outer wall of the outer ring 100 and the inner wall of the hollow wind turbine main shaft are in a clearance fit. For example... Figure 3 , Figure 5 As shown, the inner hole of the outer ring 100 is provided with a flange 101; as Figure 3 As shown, the first inner ring 200 is disposed on one side of the flange 101 of the inner hole of the outer ring, and the second inner ring 300 and the third inner ring 400 are disposed on the other side of the flange 101 of the inner hole of the outer ring.
[0037] like Figure 3 As shown, the outer wall of the first inner ring 200 and the inner wall of the outer ring 100 are fitted by a tapered surface, and a fitting gap is provided between the first inner ring 200 and one end face of the outer ring flange 101; as Figure 3 , Figure 5 As shown, the outer ring flange 101 is provided with a plurality of first threaded holes 102; as Figure 6 As shown, the first inner ring 200 is provided with a plurality of second through holes 201 corresponding to the plurality of first threaded holes 102 on the outer ring flange; as Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, the first inner ring 200 is connected to the outer ring 100 by a plurality of first bolts 500 passing through its second through hole 201 and engaging with the first threaded hole 102 of the outer ring.
[0038] like Figure 1 , Figure 3 As shown, the second inner ring 300 and the third inner ring 400 are fixed together by multiple pin connectors 600 and multiple second bolts 700; as Figure 3 As shown, the outer walls of the second inner ring 300 and the third inner ring 400 are fitted with the inner wall of the outer ring 100 via a tapered surface, and a fitting gap is provided between the outer end face of the second inner ring 300 and the other end face of the outer ring flange 101; as shown Figure 3 As shown, the outer end face of the second inner ring 300 is provided with a plurality of second threaded holes 301; as Figure 5 As shown, the outer ring flange 101 is provided with a plurality of first through holes 103 corresponding to the plurality of second threaded holes 301 on the outer end face of the second inner ring; as Figure 1 , Figure 3 As shown, the outer ring 100 is connected to the second inner ring 300 by a plurality of third bolts 800 passing through its first through hole 103 and engaging with the second threaded hole 301 of the second inner ring.
[0039] like Figure 5 As shown, the outer ring 100 in this embodiment is composed of four fan-shaped outer ring lobes 110. Of course, depending on the size of the inner diameter of the hollow main shaft of the wind turbine and the transportation conditions, the outer ring 100 can also be designed as a single piece, or a structure composed of two, three, or other numbers of outer ring lobes. When it is composed of outer ring lobes, each adjacent splicing surface is connected by a tenon and mortise structure 920. Each outer ring lobe 110 is provided with at least two first threaded holes 102 and two first through holes 103, wherein the first threaded holes 102 are through holes.
[0040] like Figure 7 As shown, the second inner ring 300 in this embodiment is composed of four fan-shaped second inner ring petals 310 spliced together. Of course, depending on the size of the inner diameter of the hollow main shaft of the wind turbine and the transportation situation, the second inner ring 300 can also be designed as a single piece, or a structure composed of two, three, or other numbers of second inner ring petals spliced together; when it is composed of second inner ring petals spliced together, adjacent splicing surfaces are connected using a mortise and tenon structure 920. For example... Figure 3 , Figure 7 As shown, each second inner ring lobe 310 is provided with at least two second threaded holes 301, two pin mounting holes 302 for pin connectors 600, and two third threaded holes 303 for mounting second bolts 700.
[0041] like Figure 1 As shown, the seams of the outer ring petal 110 are staggered from the seams of the second inner ring petal 310.
[0042] like Figure 6As shown, the first inner ring 200 in this embodiment is composed of four fan-shaped first inner ring petals 210 spliced together. Of course, depending on the size of the inner diameter of the hollow main shaft of the wind turbine and the transportation situation, the first inner ring 200 can also be designed as a single piece, or a structure composed of two, three, or other numbers of first inner ring petals spliced together; when spliced together from the first inner ring petals, adjacent splicing surfaces are connected using a mortise and tenon structure 920. For example... Figure 2 , Figure 6 As shown, each first inner ring lobe 210 is provided with at least two second through holes 201 passing through the first bolt 500, two first disassembly threaded through holes 202, two bolt heads for accommodating the third bolt 800, and a stepped hole 203 for adjusting the third bolt 800.
[0043] Here's an explanation: the third bolt 800 is preferably an internal hex bolt, so that the diameter of the stepped hole 203 is as small as possible, and the load-bearing capacity of the first inner ring 210 is as good as possible.
[0044] like Figure 8 As shown, the third inner ring 400 in this embodiment is composed of four fan-shaped third inner ring petals 410 spliced together. Of course, depending on the size of the inner diameter of the hollow main shaft of the wind turbine and the transportation situation, the third inner ring 400 can also be designed as a single piece, or a structure composed of two, three, or other numbers of third inner ring petals spliced together; when it is composed of third inner ring petals spliced together, adjacent splicing surfaces are connected using a mortise and tenon structure 920. For example... Figure 1 , Figure 8 As shown, each third inner ring lobe 410 is provided with at least two third through holes 402 passing through the second bolt 700, two pin mounting holes 403 of the pin connector 600, and two second disassembly threaded through holes 401.
[0045] like Figure 1 As shown, the seams of the first inner ring lobe 210 are staggered from the seams of the outer ring lobe 110, and the seams of the third inner ring lobe 410 are staggered from the seams of the second inner ring lobe 310.
[0046] like Figure 1 , Figure 3 , Figure 4 As shown, multiple support plates 900 are provided on the outer end face of the third inner ring 400. In this embodiment, the multiple support plates 900 are respectively located at each splice seam of the third inner ring lobe 410, and the outer surfaces of the multiple support plates 900 are fitted with a small clearance to the inner wall of the wind turbine hollow main shaft. Figure 8 As shown, each third inner ring lobe 410 is provided with two fourth threaded holes 404 for fixing the support plate 900.
[0047] like Figure 3As shown, a stop structure 340 for radial and axial positioning is provided between the two contact surfaces of the second inner ring 300 and the third inner ring 400. Figure 7 , Figure 8 As shown, the stop structure 340 is composed of a groove 304 on the inner edge of the second inner ring 300 and a boss 405 on the inner edge of the third inner ring 400.
[0048] The installation method in this embodiment is as follows:
[0049] First, all components included in the rigid reinforcing sleeve of the hollow main shaft of this embodiment are transported to the location of the bearing in the inner bore of the hollow main shaft. Then, the third inner ring 400 is assembled: two third inner ring segments 410 are connected together by a tenon and mortise structure 920, and the support plate 900 is placed at the joint of the end face with the larger outer diameter of the two third inner ring segments 410. The fourth bolt 910 is passed through the support plate 900 and tightened into the fourth threaded hole 404 of the two third inner ring segments 410. Each adjacent third inner ring segment 410 is operated in this manner in sequence, and finally the third inner ring 400 is assembled into a solid whole by the support plate 900 and the fourth bolt 910. After assembly, because there is a small clearance fit between the outer side of the support plate 900 and the inner wall of the hollow main shaft, the third inner ring 400 is located at the axial center of the hollow main shaft. Next, a second inner ring lobe 310 is installed onto the end face of the third inner ring 400 with the smaller outer diameter. The second inner ring lobe 310 and the third inner ring 400 are precisely positioned using the pin connector 600 and the stop structure 340. The second inner ring lobe 310 and the third inner ring 400 are then firmly fixed together using the second bolt 700 and the pin connector 600. Adjacent second inner ring lobes 310 are then connected together using the tenon and mortise structure 920. The pin connector 600 and the stop structure 340 are used to precisely position them together with the third inner ring 400. Finally, the second inner ring lobe 310 and the third inner ring 400 are firmly fixed together using the second bolt 700 and the pin connector 600, thus completing the assembly of the second inner ring 300 and the third inner ring 400. Next, pre-assemble the outer ring 100: Insert one outer ring petal 110 from the small-diameter end of the second inner ring 300 into the outer surface of the assembled second inner ring 300 and third inner ring 400. Pass the third bolt 800 through the first through hole 103 on the outer ring flange 101 and engage it with the second threaded hole 301 of the second inner ring 300 to connect the outer ring petal 110 to the second inner ring 300. Install the other outer ring petals 110 in sequence so that each adjacent outer ring petal 110 is connected together by the tenon and mortise structure 920. Then connect each outer ring petal 110 to the second inner ring 300 with the third bolt 800. The pre-assembly of the outer ring 100 and the second inner ring 300 is completed. Next, the first inner ring 200 is pre-installed: a first inner ring lobe 210 is inserted into the inner hole of the outer ring 100 from its small diameter end, and the first bolt 500 is passed through the second through hole 201 of the first inner ring lobe 210 and engaged with the first threaded hole 102 on the outer ring flange 101, so that the first inner ring lobe 210 is connected to the outer ring 100; the other first inner ring lobes 210 are installed in sequence, so that each adjacent first inner ring lobe 210 is connected together by the tenon and mortise structure 920, and then each first inner ring lobe 210 is connected to the outer ring 100 by the first bolt 500. The pre-installation of the first inner ring 200 and the outer ring 100 is completed.
[0050] Remove the support plate 900. Based on the fit between the outer diameter of the hollow spindle and the inner diameter of the bearing, gradually tighten the third bolt 800 and the first bolt 500. This causes the first inner ring 200, the second inner ring 300, and the third inner ring 400 to move toward the flange 101 of the outer ring 100. Through the compression between the conical surfaces, the outer diameter of the outer ring 100 expands, causing the outer wall of the hollow spindle at that location to expand. This gradually increases the interference fit between the outer diameter of the hollow spindle and the inner diameter of the bearing, adjusting the bearing clearance to the ideal design state.
[0051] The adjustment method of this utility model is as follows:
[0052] When the third bolt 800 and the first bolt 500 are tightened too much, causing excessive expansion of the outer diameter of the outer ring 100, the bearing clearance will be too small, which will also affect the bearing life. In this case, it is necessary to adjust the relative positions of the inner and outer rings. First, loosen the third bolt 800, the pin connector 600, and the second bolt 700, and remove the first bolt 500. Then, a disassembly bolt is screwed into the first disassembly threaded through hole 202 of the first inner ring 200. After the disassembly bolt abuts against the outer ring flange 101, the disassembly bolt is continued to be screwed in, moving the first inner ring 200 away from the flange 101 of the outer ring 100. At the same time, a disassembly bolt is screwed into the second disassembly threaded through hole 401 of the third inner ring 400, moving the third inner ring 400 away from the second inner ring 300. A disassembly bolt is then screwed into the first threaded through hole 102 of the outer ring 100 through the second through hole 201 of the first inner ring 200, abutting against the second inner ring 300 and moving the second inner ring 300 away from the flange 101 of the outer ring 100. The above operations reduce the compressive force between the outer ring 100 and each inner ring conical surface, reduce the outer diameter of the outer ring 100, and loosen the fit between the outer diameter of the hollow spindle and the inner diameter of the bearing. When the bearing clearance is adjusted to the ideal design state, the screwing in of each disassembly bolt is stopped, and the disassembly bolt in the first threaded through hole 102 of the outer ring 100 is removed. Then tighten the pin connector 600, the second bolt 700, the first bolt 500, and the third bolt 800 again to complete the adjustment work of this utility model. The use of the loose bolts makes it easier to adjust the interference fit between the hollow main shaft of the wind turbine and the bearing, thereby allowing the bearing clearance to be adjusted, and also locking the relative positions between the outer ring and each inner ring after adjustment.
[0053] In summary, the rigid reinforcing sleeve of this utility model for the hollow main shaft of a wind turbine is installed at the corresponding position of the bearing inside the hollow main shaft of the wind turbine. By adjusting the tightness of the first and third bolts, the conical surfaces between the outer ring and the first, second, and third inner rings can undergo corresponding axial displacement and radial compression, causing the outer diameter of the outer ring to expand. This, in turn, expands the inner and outer diameters of the corresponding positions of the hollow main shaft of the wind turbine. This improves the rigidity of the corresponding positions of the hollow main shaft while ensuring that the fit between the hollow main shaft and the bearing reaches the ideal design state, extending the service life of the bearing and avoiding replacement due to insufficient rigidity or insufficient interference fit between the hollow main shaft and the bearing. This utility model is highly operable, has low installation costs, far lower than the replacement cost of the hollow main shaft of the wind turbine, and is economically efficient. The outer ring and each inner ring can adopt a segmented structure, reducing the weight of individual parts to a level suitable for manual movement and assembly, and significantly reducing the size of the parts, thus simplifying and facilitating high-altitude transportation and installation. The support plate simplifies and ensures the safe assembly of the third inner ring, providing a secure foundation for the subsequent overall installation of the inner and outer rings. The presence of a first threaded through-hole for disassembly on the first inner ring lobe, a second threaded through-hole for disassembly on the third inner ring lobe, and multiple first threaded through-holes on the outer ring flange allows for readjustment of the components after installation. This facilitates adjustment of the interference fit between the hollow main shaft of the wind turbine and the bearings, enabling bearing clearance adjustment, and also locks the relative positions of the outer ring and the inner rings after adjustment. Therefore, this invention effectively overcomes the shortcomings of existing technologies and possesses high industrial applicability and promotional value.
[0054] The above embodiments are merely illustrative of the principles and effects of this utility model, and are not intended to limit this utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. A rigid reinforcing sleeve for a hollow wind turbine main shaft, characterized in that, It includes an outer ring (100), a first inner ring (200), a second inner ring (300), and a third inner ring (400); The outer wall of the outer ring (100) and the inner wall of the hollow wind turbine main shaft are in clearance fit; the inner hole of the outer ring (100) is provided with a flange (101), the first inner ring (200) is provided on one side of the flange (101) of the inner hole of the outer ring, and the second inner ring (300) and the third inner ring (400) are provided on the other side of the flange (101) of the inner hole of the outer ring; The outer wall of the first inner ring (200) and the inner wall of the outer ring (100) are fitted by a tapered surface. A fitting gap is provided between one end face of the flange (101) of the first inner ring (200) and the outer ring. The flange (101) of the outer ring is provided with a plurality of first threaded holes (102). The first inner ring (200) is provided with a plurality of second through holes (201) corresponding to the plurality of first threaded holes (102) on the flange of the outer ring. The first inner ring (200) is connected to the outer ring (100) by a plurality of first bolts (500) that pass through its second through holes (201) and fit with the first threaded holes (102) of the outer ring. The second inner ring (300) and the third inner ring (400) are fixed together by multiple pin connectors (600) and multiple second bolts (700). The outer walls of the second inner ring (300) and the third inner ring (400) are fitted with the inner wall of the outer ring (100) by a tapered surface. A fitting gap is provided between the outer end face of the second inner ring (300) and the other end face of the outer ring flange (101). Multiple second threaded holes (301) are provided on the outer end face of the second inner ring (300). Multiple first through holes (103) are provided on the flange (101) of the outer ring corresponding to the multiple second threaded holes (301) on the outer end face of the second inner ring. The outer ring (100) is connected to the second inner ring (300) by multiple third bolts (800) that pass through its first through holes (103) and fit with the second threaded holes (301) of the second inner ring.
2. The rigid reinforcing sleeve for a hollow wind turbine main shaft according to claim 1, characterized in that: The outer ring (100) is formed by splicing at least two fan-shaped outer ring petals (110), and each adjacent splicing surface is connected by a mortise and tenon structure (920); the second inner ring (300) is formed by splicing at least two fan-shaped second inner ring petals (310), and each adjacent splicing surface is connected by a mortise and tenon structure (920); the splicing seams of the outer ring petals (110) are staggered from the splicing seams of the second inner ring petals (310).
3. The rigid reinforcing sleeve for a hollow wind turbine main shaft according to claim 2, characterized in that: The first inner ring (200) is formed by splicing at least two fan-shaped first inner ring petals (210), and each adjacent splicing surface is connected by a mortise and tenon structure (920); the third inner ring (400) is formed by splicing at least two fan-shaped third inner ring petals (410), and each adjacent splicing surface is connected by a mortise and tenon structure (920); each splicing seam of the first inner ring petal (210) is staggered from each splicing seam of the outer ring petal (110), and each splicing seam of the third inner ring petal (410) is staggered from each splicing seam of the second inner ring petal (310).
4. The rigid reinforcing sleeve for a hollow wind turbine main shaft according to claim 3, characterized in that: Multiple support plates (900) are provided on the outer end face of the third inner ring (400). The multiple support plates (900) are respectively located at each splice seam of the third inner ring petal (410). The outer side of the multiple support plates (900) and the inner wall of the wind turbine hollow main shaft are fitted with a small clearance.
5. The rigid reinforcing sleeve for a hollow wind turbine main shaft according to claim 3 or 4, characterized in that: At least two first disassembly threaded through holes (202) are provided on the end face of each of the first inner ring lobe (210).
6. The rigid reinforcing sleeve for a hollow wind turbine main shaft according to claim 3 or 4, characterized in that: Each of the third inner ring lobe (410) has at least two second disassembly threaded through holes (401) on its end face.
7. The rigid reinforcing sleeve for the hollow main shaft of a wind turbine according to any one of claims 1 to 4, characterized in that: The multiple first threaded holes (102) on the outer ring flange are all through holes.
8. The rigid reinforcing sleeve for the hollow main shaft of a wind turbine according to any one of claims 1 to 4, characterized in that: A stop structure (340) for radial and axial positioning is provided between the two contact surfaces of the second inner ring (300) and the third inner ring (400).