Split type wind turbine hub

Abstract

The present application relates to a kind of split wind generator hub, including upper piece hub (1), lower piece hub (2) and positioning assembly (3);The upper piece hub (1) and lower piece hub (2) of described can be detachably connected by fastener, positioning assembly (3) is arranged between the upper piece hub (1) and lower piece hub (2);The upper piece hub (1) and lower piece hub (2) are respectively provided with upper piece blade bearing flange (11) and lower piece blade bearing flange (21), and upper piece blade bearing flange (11) and lower piece blade bearing flange (21) can be split to constitute circular blade bearing flange.Compared with prior art, the present application can reduce assembly difficulty, increase the rigidity and strength of upper / lower piece hub.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, specifically to a split-type wind turbine hub. Background Technology

[0002] The main shaft and blades function to transfer the wind load on the blades to the main shaft and gearbox. With the increasing size of wind turbine generators, the hub size and weight are also increasing, raising manufacturing complexity and costs. Therefore, modular hubs have emerged, combining multiple hubs into a single unit, effectively reducing the size of individual components.

[0003] Invention patent CN112283019A discloses a combined hub structure for a wind turbine generator set and a wind turbine generator set, including a first distribution hub, a second segmented hub and a third segmented hub, which are connected end to end to form a closed structure. Although this reduces the volume of a single component, it makes assembly more difficult. Summary of the Invention

[0004] The purpose of this invention is to provide a split-type wind turbine hub that reduces assembly difficulty.

[0005] The objective of this invention can be achieved through the following technical solution: a split-type wind turbine hub, comprising an upper hub, a lower hub, and a positioning assembly;

[0006] The upper and lower wheel hubs are detachably connected by fasteners, and a positioning component is provided between the upper and lower wheel hubs;

[0007] The upper and lower hubs are respectively provided with an upper blade bearing flange and a lower blade bearing flange, which can be assembled to form a circular blade bearing flange.

[0008] Preferably, the upper hub comprises an integrally formed upper blade bearing flange, an upper frame, and an upper web.

[0009] The lower casting includes an integrally formed lower blade bearing flange, lower frame, and lower web;

[0010] The upper frame and the lower frame, as well as the upper web and the lower web, are fastened together with fasteners. After fastening, the upper blade bearing flange and the lower blade bearing flange are assembled to form a circular blade bearing flange.

[0011] More preferably, both the upper frame and the lower frame are provided with corresponding first connecting flanges, and fasteners are used to fasten the upper frame and the lower frame through the first connecting flanges.

[0012] More preferably, the first connecting flange is integrally formed with the frame.

[0013] More preferably, the inner sides of both the upper frame and the lower frame are provided with corresponding frame reinforcing bosses, which are integrally formed with the frame and are located at the same height as the first connecting flange.

[0014] More preferably, both the upper web and the lower web are provided with corresponding second connecting flanges, and fasteners are used to fasten the upper web and the lower web through the second connecting flanges.

[0015] More preferably, the second connecting flange is integrally formed with the web plate.

[0016] More preferably, the inner sides of both the upper and lower web plates are provided with corresponding web plate reinforcing bosses, which are integrally formed with the web plates and are located at the same height as the second connecting flange.

[0017] Preferably, the positioning component includes a mounting guide pin and a positioning anti-shear pin;

[0018] The mounting guide pin is detachably mounted on the lower plate hub, and the upper plate hub is provided with a mounting guide pin hole corresponding to the mounting guide pin. The positioning anti-shear pin is set on the lower plate hub, and the upper plate hub is provided with a positioning anti-shear pin hole corresponding to the positioning anti-shear pin.

[0019] More preferably, the mounting guide pin includes a smooth rod section and an external threaded section. The mounting guide pin is detachably mounted on the threaded hole of the lower wheel hub through the external threaded section, and the smooth rod section extends beyond the lower wheel hub.

[0020] More preferably, three sets of mounting guide pins and positioning anti-shear pins are provided between the upper wheel hub and the lower wheel hub, wherein the positioning anti-shear pin in one set is a solid pin, and the positioning anti-shear pins in the other two sets are spring cotter pins or chamfered pins.

[0021] Preferably, the lower hub is provided with a shear stop groove, and after the upper hub and the lower hub are spliced ​​together, the shear stop groove is located on the outside of the upper hub.

[0022] Preferably, the fastener is a bolt.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] 1. This invention divides the wheel hub into an upper wheel hub and a lower wheel hub, which are cast and machined separately. Then, during assembly, they are connected together by fasteners and positioning components. This reduces the difficulty of assembly, casting, machining, transportation, and installation, and effectively reduces the production cost of wheel hub castings.

[0025] 2. The positioning component of this invention facilitates the assembly of split wheel hubs, reduces the installation difficulty in the assembly workshop, and can prevent mutual slippage and misalignment between split wheel hubs;

[0026] 3. The positioning component of this invention is configured by the cooperation of installation guide pins and positioning anti-shear pins. The installation guide pins are used for initial installation guidance, and the positioning anti-shear pins are used for precise matching of the upper and lower pieces, reducing the assembly difficulty.

[0027] 4. The shear groove of this invention can prevent problems such as misalignment, torsion, and slippage between the upper and lower hub plates during the operation of the wind turbine;

[0028] 5. The positioning anti-shear pin of this invention uses one solid pin and two spring pins installed on the lower hub with positioning pin holes. The positioning pin and the hub are precisely fitted, which can not only achieve a good positioning effect, but also avoid the problem of over-positioning. The positioning anti-shear pin can also prevent the bolt from being sheared. When the upper and lower hubs connected by bolts slip relative to each other, the anti-shear pin will first contact the hub hole wall through the fit, preventing further relative misalignment between the hubs, thereby protecting the bolt.

[0029] 6. The web and frame of this invention are integrally formed, which can increase the rigidity and strength of the upper / lower hub, enabling the hub system to resist greater blade root loads;

[0030] 7. The second connecting flange on the web of the present invention can not only connect the upper and lower casting pieces, but also increase the rigidity of the hub and resist greater deformation.

[0031] 8. The present invention can achieve structural reinforcement and stability by setting up frame reinforcement bosses and web plate reinforcement bosses;

[0032] 9. This invention can solve the problems caused by the difficulty in manufacturing large wheel hubs, large transportation dimensions, and supply chain shortages. Under the premise of meeting the existing blade interface and main shaft interface, the integral casting wheel hub is separately cast and processed, and then connected into one piece by flange bolts, which can reduce the difficulty of casting, processing and transportation of such wheel hubs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the split-type wind turbine hub of the present invention;

[0034] Figure 2 This is a schematic diagram of the upper hub structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of the lower hub of the present invention;

[0036] Figure 4This is a schematic diagram of the positioning component of the present invention;

[0037] Figure 5 This is a partial schematic diagram of the lower hub of the present invention;

[0038] Figure 6 This is a schematic diagram of the upper hub structure of the present invention;

[0039] Figure 7 This is a schematic diagram of the structure for installing the guide pin in this invention;

[0040] In the diagram: 1-Upper hub, 11-Upper blade bearing flange, 12-Upper frame, 13-Upper web, 14-Mounting guide pin hole, 15-Positioning shear pin hole, 2-Lower hub, 21-Lower blade bearing flange, 22-Lower frame, 23-Lower web, 24-Threaded hole, 25-Smooth hole, 3-Positioning assembly, 31-Mounting guide pin, 311-Chamfer, 312-Hex socket hole, 32-Positioning shear pin, 4-First connecting flange, 5-Frame reinforcing boss, 6-Second connecting flange, 7-Web reinforcing boss, 8-Shear stop groove. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0042] Example 1

[0043] A type of split-type wind turbine hub, such as Figure 1 As shown, it includes an upper hub 1, a lower hub 2, and a positioning component 3 disposed between the upper and lower hubs. The upper and lower hubs are detachably connected by fasteners.

[0044] The upper hub 1 is provided with an upper blade bearing flange 11, and the lower hub 2 is provided with a lower blade bearing flange 21. When the upper and lower hubs are fastened together by fasteners, the upper blade bearing flange 11 and the lower blade bearing flange 21 are assembled to form an annular blade bearing flange.

[0045] Example 2

[0046] A split-type wind turbine hub, the upper hub 1 has the following structure: Figure 2 As shown, the structure includes an integrally formed upper blade bearing flange 11, an upper frame 12, and an upper web 13, and the lower hub 2 has the following structure: Figure 3As shown, the assembly includes an integrally formed lower blade bearing flange 21, a lower blade frame 22, and a lower blade web 23. Corresponding first connecting flanges 4 are integrally formed on the outer sides of the upper blade frame 12 and the lower blade frame 22, and corresponding second connecting flanges 6 are integrally formed on the outer sides of the upper blade web 13 and the lower blade web 23. Multiple fasteners secure the upper blade frame 12 and the lower blade frame 22 via the first connecting flanges 4, and secure the upper blade web 13 and the lower blade web 23 via the second connecting flanges 6. In this embodiment, the fasteners are bolts, and the connecting flanges have bolt through holes. The rest is the same as in Embodiment 1.

[0047] Example 3

[0048] A split-type wind turbine hub has frame reinforcing bosses 5 on the inner sides of the upper frame 12 and the lower frame 22, which are integrally formed with the frame. Web plate reinforcing bosses 7 are also provided on the inner sides of the upper web plate 13 and the lower web plate 23, which are integrally formed with the web plate.

[0049] In the same segmented wheel hub, the first connecting flange 4, the second connecting flange 6, the frame reinforcing boss 5, and the web reinforcing boss 7 are located at the same height. The rest is the same as in Example 2.

[0050] Example 4

[0051] A type of split-type wind turbine hub, such as Figure 4 As shown, the positioning component 3 includes a mounting guide pin 31 and a positioning shear pin 32. (As indicated...) Figures 5-6 As shown, the mounting guide pin 31 is detachably mounted on the threaded hole 24 of the lower hub 2. The upper hub 1 has a mounting guide pin hole 14 corresponding to the mounting guide pin 3. The positioning anti-shear pin 32 is set on the smooth hole 25 of the lower hub 2, and the upper hub 1 has a positioning anti-shear pin hole 15 corresponding to the positioning anti-shear pin 32. The mounting guide pin 31 serves as an initial installation guide, ensuring that misalignment is prevented during initial installation and reducing the installation difficulty in the assembly workshop. The positioning anti-shear pin 32 is used for precise fit between the upper and lower hubs. The rest is the same as in Embodiment 3.

[0052] Example 5

[0053] A split-type wind turbine hub, with a structure for mounting guide pin 31 as shown below. Figure 7 As shown, it includes a smooth rod section and an externally threaded section. The mounting guide pin 31 is detachably mounted on the lower wheel hub 2 through the externally threaded section. The front end of the smooth rod section is provided with a chamfer 311, which can pass through the mounting guide pin hole 14 for initial coarse guidance installation. The tail end of the externally threaded section is provided with an internal hexagonal hole 312 to facilitate the installation and removal of the mounting guide pin 31. The rest is the same as in Embodiment 4.

[0054] Example 6

[0055] A split-type wind turbine hub, wherein the edge of the second connecting flange 6 of the lower hub 2 is provided with a shear-resistant groove 8. In this embodiment:

[0056] 1. Install guide pin 31 for initial guidance and positioning during the initial docking of the upper and lower wheel hubs. The front end of guide pin 31 is designed with a long chamfer 311 for guidance, and the tail end is threaded for installation and fixing to the lower wheel hub 2. The tail end is machined with an internal hexagonal chamfer (internal hexagonal hole 312) for tightening the guide pin.

[0057] 2. Positioning anti-shear pin 32 is used for precise positioning of the upper and lower wheel hubs. The precise fit between the positioning anti-shear pin 32 and the pin hole ensures that the relative positions of the upper and lower wheel hubs are precisely matched.

[0058] 3. Shear stop groove 8 is used to prevent misalignment and slippage between the upper and lower hub plates during the operation of the wind turbine.

[0059] When assembling the upper and lower wheel hubs, the threaded mounting guide pin 31 is installed on the lower wheel hub 2, which has a threaded hole 24. After installation, the mounting guide pin 31 should protrude above the wheel hub flange surface to ensure that the smooth section of the mounting guide pin 31 is inserted into the mounting guide pin hole 14 of the upper wheel hub 1 before the upper wheel hub 1 contacts the lower wheel hub 2, for initial coarse guidance installation.

[0060] After the installation guide pin 31 serves as the initial installation guide, the positioning anti-shear pin 32 is used for precise fit between the upper and lower wheel hubs. Then, the bolts between the upper and lower wheel hubs are tightened, and the installation guide pin 31 is removed. The rest is the same as in Example 5.

[0061] Example 7

[0062] A split-type wind turbine hub includes an upper frame 12 with a pitch bearing flange at the top and a lower hub 2 connected to the bottom via fasteners. Three upper blade bearing flanges 11 are located on the side, with an upper web 13 positioned inside each flange. The lower frame 22 has a main shaft flange at the bottom and is connected to the upper hub 1 at the top via fasteners. Three lower blade bearing flanges 21 are located on the side, with a lower web 23 positioned inside each flange. The upper and lower hubs 1 and 2 are fastened together to form three complete blade bearing flanges. The upper and lower hubs 1 and 2 serve as structural load-bearing components, connecting the pitch bearing flange and main shaft flange respectively, and bearing loads from the blade root. The rest is the same as in Embodiment 6.

[0063] Example 8

[0064] A split-type wind turbine hub has an upper hub 1 and a lower hub 2 whose splicing surfaces form a triangular structure. Three sets of mounting guide pins 31 and positioning anti-shear pins 32 are provided between the upper and lower hubs. To prevent over-positioning, two of the positioning anti-shear pins 32 have a slotted design; that is, one set of positioning anti-shear pins 32 is a solid pin, while the other two sets are spring cotter pins or beveled pins. Threaded holes 24 and smooth holes 25 are located in the triangle on the splicing surface of the lower hub 2, while mounting guide pin holes 14 and positioning anti-shear pin holes 15 are located in the triangle on the splicing surface of the upper hub 1. The rest is the same as in Embodiment 7.

[0065] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A split-type wind turbine hub, characterized in that, It includes an upper hub (1), a lower hub (2), and a positioning assembly (3); The upper wheel hub (1) and the lower wheel hub (2) are detachably connected by fasteners, and a positioning component (3) is provided between the upper wheel hub (1) and the lower wheel hub (2); The upper hub (1) and the lower hub (2) are respectively provided with an upper blade bearing flange (11) and a lower blade bearing flange (21), which can be assembled to form an annular blade bearing flange. The upper hub (1) includes an integrally formed upper blade bearing flange (11), an upper frame (12), and an upper web (13); The lower blade hub (2) includes an integrally formed lower blade bearing flange (21), a lower blade frame (22), and a lower blade web (23); The upper frame (12) and the lower frame (22), as well as the upper web plate (13) and the lower web plate (23), are fastened together by fasteners. After fastening, the upper blade bearing flange (11) and the lower blade bearing flange (21) are assembled to form an annular blade bearing flange. The positioning component (3) includes a mounting guide pin (31) and a positioning anti-shear pin (32); The mounting guide pin (31) is detachably mounted on the lower plate hub (2), and the upper plate hub (1) is provided with a mounting guide pin hole (14) corresponding to the mounting guide pin (31). The positioning anti-shear pin (32) is set on the lower plate hub (2), and the upper plate hub (1) is provided with a positioning anti-shear pin hole (15) corresponding to the positioning anti-shear pin (32). Three sets of mounting guide pins (31) and positioning anti-shear pins (32) are provided between the upper hub (1) and the lower hub (2). One set of positioning anti-shear pins (32) is a solid pin, and the other two sets of positioning anti-shear pins (32) are spring cotter pins or beveled pins. The lower hub (2) is provided with an anti-shear groove (8). After the upper hub (1) and the lower hub (2) are spliced ​​together, the anti-shear groove (8) is located on the outside of the upper hub (1).

2. The split-type wind turbine hub according to claim 1, characterized in that, The upper frame (12) and the lower frame (22) are each provided with a corresponding first connecting flange (4), and the fasteners are fastened to the upper frame (12) and the lower frame (22) through the first connecting flange (4).

3. The split-type wind turbine hub according to claim 2, characterized in that, The upper frame (12) and the lower frame (22) are provided with corresponding frame reinforcing bosses (5) on their inner sides. The frame reinforcing bosses (5) are integrally formed with the frame and are located at the same height as the first connecting flange (4).

4. The split-type wind turbine hub according to claim 1, characterized in that, The upper web (13) and the lower web (23) are each provided with a corresponding second connecting flange (6), and the fasteners are fastened to the upper web (13) and the lower web (23) through the second connecting flange (6).

5. The split-type wind turbine hub according to claim 4, characterized in that, The upper web plate (13) and the lower web plate (23) are provided with corresponding web plate reinforcing bosses (7) on their inner sides. The web plate reinforcing bosses (7) are integrally formed with the web plate and are located at the same height as the second connecting flange (6).

6. The split-type wind turbine hub according to claim 1, characterized in that, The mounting guide pin (31) includes a smooth rod section and an external thread section. The mounting guide pin (31) is detachably mounted on the threaded hole of the lower wheel hub (2) through the external thread section. The smooth rod section extends beyond the lower wheel hub (2).

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