Split type wheel hub

Abstract

A split type wheel hub, comprising a plurality of split wheel hubs which are equal in number to wind power blades, each split wheel hub is connected with a blade stem of a corresponding wind power blade, and each split wheel hub is spliced to form a whole wheel hub; the split wheel hub is divided into upper and lower sections, and the upper and lower sections of the split wheel hub are connected with upper and lower sections of the blade stem respectively to be transported in a split manner. The wheel hub is divided into a plurality of sections, which not only facilitates storage and transportation, but also reduces the manufacturing difficulty of the wheel hub; each split wheel hub is connected with the blade stem of the wind power blade, which can be transported together with the blade stem, greatly improving the transportation efficiency and being convenient to install; the split wheel hub is further segmented, and the truss of the blade stem is segmented in an up-down manner, which can further reduce the volume of the wheel hub, and the sea and land transportation can be more easily carried out in accordance with the container standard during transportation, and only the bolt assembly of the split wheel hub and the blade stem in the upper and lower sections is needed during on-site installation, which greatly improves the assembly speed.

Description

Technical Field

[0001] This utility model relates to a wind power generation hub, and more particularly to a split-type hub. Background Technology

[0002] The wind turbine hub plays a crucial role in wind turbine generators, connecting the main shaft and blades and responsible for transmitting the wind load on the blades to the main shaft and gearbox. As wind turbine generators grow in scale, the size and weight of the hubs also increase, posing challenges to their transportation and manufacturing. Due to their large size, hubs cannot meet container standards for overseas transport, and the casting process for large hubs requires increasingly stringent requirements, necessitating a corresponding increase in the processing radius of machining equipment. This inevitably raises both transportation and manufacturing costs. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and provide a split-type wheel hub that is low in cost, high in transportation efficiency, and easy to manufacture.

[0004] The technical solution of this utility model is: a split hub, comprising multiple split hub sections with the same number as wind turbine blades, each split hub section being connected to the stem of the corresponding wind turbine blade, and the split hub sections being spliced ​​together to form a whole hub.

[0005] Furthermore, there is a detachable connection between adjacent split wheel hubs.

[0006] Furthermore, the overall cross-sectional shape of the wheel hub is circular or N-sided, where N ≥ 3.

[0007] Preferably, when the overall cross-sectional shape of the wheel hub is circular, the split wheel hub has three sections. The three sections of the split wheel hub are spliced ​​together and closed to form a circular wheel hub. The three sections of the split wheel hub have the same structure and are one-third the size of a whole circle.

[0008] Furthermore, the split hub is provided with a first flange plate, which has a connecting hole for connecting the leaf stem and a number of threaded holes around the connecting hole. The first flange plates of adjacent split hub sections are connected as one unit by threaded parts passing through the threaded holes.

[0009] Furthermore, the leaf stem is a truss structure, and the number of first flange plates on each segment of the split hub is the same as the number of main rods of the leaf stem truss. Each main rod of the truss extends into the connection hole of the corresponding first flange plate for fixation.

[0010] Furthermore, the split hub is divided into at least two sections, which are connected by a second flange plate.

[0011] Furthermore, the leaf stem is a truss structure, and the section of the truss at the root of the leaf stem is prefabricated as a single unit with the split hub; when the split hub is divided into at least two sections, the section of the truss at the root is also divided into at least two sections.

[0012] Furthermore, a hub connecting plate is provided on the connecting surface between adjacent split hubs, so that adjacent split hubs are connected into one unit through the hub connecting plate and the first flange plate.

[0013] Furthermore, the first flange plate is provided at each of the four corners of the split hub, and the cross-sectional shape of the leaf stem is quadrilateral.

[0014] Furthermore, during transportation, the hub is divided into multiple sections, each of which is further divided into upper and lower sections. The upper section of the hub is connected to the upper section of the leaf stem, and the lower section is connected to the lower section of the leaf stem for disassembly and transportation. The first flange plate and the second flange plate are prefabricated on the hub.

[0015] The beneficial effects of this utility model are as follows: Firstly, by dividing the hub into multiple sections, it not only facilitates storage and transportation but also reduces the manufacturing difficulty of the hub. By connecting each segmented hub to the blade stem of the wind turbine, it can be transported together with the blade stem, greatly improving transportation efficiency and facilitating installation. By further segmenting the hub and the truss connecting the blade stem into upper and lower sections, the hub volume can be further reduced, making it easier to meet container standards for sea and land transportation. On-site installation only requires bolting the upper and lower segments of the hub and the blade stem, greatly improving assembly speed. Secondly, by setting the first flange plate and the hub connecting plate, the connection strength between adjacent hub segments can be greatly improved, ensuring the overall stability of the hub. By setting the second flange plate, the connection strength between the upper and lower hub segments can be greatly improved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the wheel hub according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the disassembled wheel hub structure of the embodiment shown;

[0018] Figure 3 yes Figure 1 The diagram shown is a structural schematic of the split wheel hub in Embodiment 1.

[0019] Figure 4 yes Figure 1 A schematic diagram of the rear structure of another split-type wheel hub in the illustrated embodiment;

[0020] Figure 5 yes Figure 4A partially enlarged schematic diagram of the embodiment shown.

[0021] Explanation of reference numerals in the attached diagram:

[0022] 1. Split hub; 2. Truss; 3. First flange plate; 4. Hub connecting plate; 5. Second flange plate; 6. First reinforcing rib; 7. Second reinforcing rib; 8. Arc-shaped connecting plate; 21. Main rod; 22. Connecting rod; 31. Head; 32. Connecting part; 311. Connecting hole; 312. Threaded hole. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-5 As shown: A split hub includes multiple split hub sections 1, the same number as the number of wind turbine blades. Each split hub section 1 is connected to the stem of the corresponding wind turbine blade, specifically to a section of the truss 2 of the stem. The split hub sections 1 are spliced ​​together to form a whole hub.

[0025] Preferably, the number of split wheel hubs 1 is three sections. These three sections are joined together to form a circular wheel hub assembly. The three sections have identical structures, each representing one-third of a complete circle. This embodiment, by designing the wheel hub as a split structure, facilitates storage and transportation, greatly improving transportation efficiency. Furthermore, it reduces the manufacturing difficulty of the wheel hub, thereby lowering costs.

[0026] In this embodiment, a first flange plate 3 is provided at the upper and lower four corners of the split hub 1. The first flange plate 3 includes a head 31 and a connecting part 32 that is threadedly connected to the end face of the split hub 1. The cross-sectional shape of the first flange plate 3 can be designed as a ping-pong paddle shape or other shapes. For example, the head 31 is an annular plate, and the connecting part 32 is a long strip plate extending along the annular plate. The head 31 of the first flange plate is provided with a connecting hole 311 for connecting the leaf stem and a plurality of threaded holes 312 provided around the connecting hole. The first flange plates 3 of adjacent split hub sections are connected to each other as a whole by threaded fasteners (such as bolts) passing through the threaded holes 312. In order to further improve the connection strength, the connecting part 32 of the first flange plate can be provided with at least two rows of threaded holes. At least one row of threaded holes is threadedly connected to the end face of the split hub 1, and the other rows of threaded holes extend upward along the end face of the split hub, so that the first flange plates 3 of adjacent split hub sections are further connected and fixed through the row of threaded holes. Alternatively, the first flange plate 3 can be directly welded to the split wheel hub.

[0027] It is understandable that the structures of the two first flange plates at the upper corner and the two first flange plates at the lower corner of the split hub 1 can be the same or different.

[0028] In this embodiment, the blade stem is located within the cavity of the wind turbine blade and extends along the blade, connecting to the hub. The blade stem has a truss structure, divided into multiple sections. The section 2 located at the root of the blade stem is connected to the split hub 1, allowing the split hub 1 to be transported together with this section of the blade stem. Upon arrival at the construction site, this section of the truss 2 is flanged together with the other sections to form a complete blade stem. Specifically, the number of main rods 21 in this section of the truss 2 is the same as the number of first flange plates 3 on each split hub section. In this embodiment, four first flange plates 3 are provided at the four corners of the split hub 1, resulting in four main rods 21 in this section of the truss 2, each inserted into a corresponding connecting hole 311. Since the main rod 21 is not perpendicularly connected to the head 31 of the first flange plate, the end of the main rod 21 extending into the connecting hole 311 is designed as a bevel, and the main rod 21 is inserted into the connecting hole 311 and welded to it.

[0029] In this embodiment, a hub connecting plate 4 is provided on the two end faces of the split hub 1 at a position between the upper and lower first flange plates 3. The hub connecting plate 4 is preferably welded to the end face of the split hub 1 and has multiple rows of threaded holes. After adjacent split hubs 1 are mated, bolts are passed through the threaded holes to achieve a fixed connection between the two. It can be said that in this embodiment, adjacent split hubs 1 are connected by threads through the first flange plate 3 and the hub connecting plate 4, which greatly improves the connection strength, ensures the overall connection stability of the hub, and prevents the hub from loosening or separating during rotation.

[0030] In this embodiment, the split hub 1 can be an integral structure or designed as a segmented structure. Preferably, in this embodiment, the split hub 1 is divided into upper and lower sections to further reduce the manufacturing difficulty of the hub and improve transportation efficiency. The hub connecting plate 4 is also designed in segments. That is, each end face of the upper and lower split hub sections is provided with a hub connecting plate 4, and both the first flange plate 3 and the hub connecting plate 4 are prefabricated on the split hub 1 for easy overall transportation. After arriving at the construction site, they only need to be spliced ​​together with bolts, which improves both transportation efficiency and installation speed. The upper and lower split hub sections are fixed together by threads using a second flange plate 5. The bottom surface of the upper split hub section and the top surface of the lower split hub section are both welded with a second flange plate 5, which extends along the outer periphery of the split hub 1, with several threaded holes on the extended portion; and both ends of the second flange plate 5 extend into strip flange structures towards the hub connecting plate 4, parallel to the hub connecting plate 4. Thus, after the upper and lower split wheel hub sections are joined, they can be bolted together using the second flange plate 5. The structure of the second flange plate 5 in this embodiment can greatly improve the connection strength between the upper and lower split wheel hub sections.

[0031] In this embodiment, when the split hub 1 is designed as a segmented structure, the truss 2 at the root of the leaf stem is also designed as a segmented structure. For example, the truss 2 includes four main rods 21, and the connecting rod 22 between the upper and lower main rods 21 is divided into two sections. The upper and lower sections of the connecting rod 33 are connected by flanges, and the connecting rod 33 includes vertical rods and diagonal rods. When the split hub 1 needs to be disassembled into upper and lower sections, the connecting rod 22 located between the upper and lower main rods 21 of this truss 2 is also disassembled into upper and lower sections. In this way, during transportation, the truss 2 can be prefabricated on the split hub 1 for transportation, and the upper section of the split hub 1 carries the upper part of the truss 2, and the lower end of the split hub 1 carries the lower part of the truss 2. This not only improves transportation efficiency, allowing multiple hubs to be transported at once, but also improves installation efficiency on site. There is no need to reassemble the truss 2 onto the split hub 1 on site; only the connecting rod 22 between the upper and lower trusses of the split hub 1 needs to be connected by flanges. The segmented structure of the split wheel hub in this embodiment is particularly suitable for large wheel hubs, especially when dividing the wheel hub into sections cannot meet the container transportation standards.

[0032] In this embodiment, a number of first reinforcing ribs 6 are provided between the head 31 of the first flange plate and the main rod 21 of the truss section, and a number of second reinforcing ribs 7 are provided between the back of the hub connecting plate 4 and the split hub 1.

[0033] In this embodiment, an arc-shaped connecting plate 8 extends from the lower part of the concave cavity inner wall of the split hub 1. The arc-shaped connecting plate 8 is provided with several threaded holes. When the three split hubs 1 are spliced ​​into one piece, the main shaft bearing or other components inside the hub can be bolted to the arc-shaped connecting plate 8.

[0034] The working principle of this embodiment is as follows: the hub is divided into several sections, such as three-section split hubs 1, and each split hub 1 can be further divided into at least two segments; the first flange plate 3, the second flange plate 5, the hub connecting plate 4, and the arc-shaped connecting plate 8 are prefabricated on the split hubs 1, and the root section of the truss 2 of the leaf stem is prefabricated on the split hubs 1, and each split hub 1 is further divided into two segments, each segment connecting to a part of the truss 2; during transportation, a whole hub can be divided into six segments for transportation, so that the hub can meet the container size for sea and land transportation, which greatly improves transportation efficiency and meets container transportation standards compared to transporting a single large hub; during on-site assembly, only the upper and lower sections of the split hub 1 and the upper and lower parts of the truss 2 need to be connected, and then the three-section split hubs 1 are assembled to form a complete hub shape. Subsequently, bearings, main shafts, etc. are installed inside the hub, and the other segments of the leaf stem truss are assembled with the root truss 2.

[0035] In summary, this embodiment, on the one hand, by dividing the hub into multiple sections, not only facilitates storage and transportation but also reduces the manufacturing difficulty of the hub; by connecting each segmented hub to the blade stem, it can be transported together with the blade stem, greatly improving transportation efficiency and facilitating installation; by further segmenting the hub and the truss connecting the blade stem into upper and lower sections, the hub's volume can be further reduced, making it easier to meet container standards for sea and land transportation, and on-site installation only requires bolting the upper and lower sections of the hub and blade stem together, greatly improving assembly speed; on the other hand, by setting a first flange plate and a hub connecting plate, the connection strength between adjacent hub sections can be greatly improved, ensuring the overall stability of the hub; by setting a second flange plate, the connection strength between the upper and lower hub sections can be greatly improved.

Claims

1. A split-type wheel hub, characterized in that, It includes a multi-section split hub with the same number of wind turbine blades. Each split hub is connected to the stem of the corresponding wind turbine blade, and the split hubs are spliced ​​together to form a whole hub.

2. The split-type wheel hub according to claim 1, characterized in that, Adjacent split wheel hubs are detachably connected; the overall cross-sectional shape of the wheel hub is circular or N-sided, where N≥3.

3. The split-type wheel hub according to claim 2, characterized in that, The split wheel hub has three sections. The three sections are spliced ​​together to form a circular wheel hub. The three sections have the same structure and are one-third the size of a circle.

4. The split-type wheel hub according to claim 1, 2, or 3, characterized in that, The split hub is provided with a first flange plate, which has a connecting hole for connecting the leaf stem and a number of threaded holes around the connecting hole. The first flange plates of adjacent split hub sections are connected as one unit by threaded parts passing through the threaded holes.

5. The split-type wheel hub according to claim 4, characterized in that, The leaf stem is a truss structure. The number of first flange plates on each split hub is the same as the number of main members of the leaf stem truss. Each main member of the truss extends into the connection hole of the corresponding first flange plate for fixation.

6. The split-type wheel hub according to claim 1, 2, or 3, characterized in that, The split hub is further divided into at least two sections, which are connected by a second flange plate.

7. The split-type wheel hub according to claim 6, characterized in that, The leaf stem is a truss structure, and the section of the truss at the root of the leaf stem is prefabricated as a single unit with the split hub; when the split hub is divided into at least two sections, the section of the truss at the root is also divided into at least two sections.

8. The split-type wheel hub according to claim 4, characterized in that, A hub connecting plate is provided on the connecting surface between adjacent split hubs, so that adjacent split hubs are connected into one piece by the hub connecting plate and the first flange plate.

9. The split-type wheel hub according to claim 4, characterized in that, The first flange plate is provided at each of the four corners of the split hub, and the cross-sectional shape of the leaf stem is quadrilateral.

10. The split-type wheel hub according to claim 7, characterized in that, During transportation, the hub is divided into multiple split hub sections, which are further divided into upper and lower sections. The upper section of the split hub is connected to the upper section of the leaf stem, and the lower section of the split hub is connected to the lower section of the leaf stem for disassembly and transportation. The first flange plate and the second flange plate are prefabricated on the split hub.

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