Hub of wind turbine and wind turbine

Abstract

The present application relates to the technical field of wind power equipment, and particularly relates to a hub of a wind driven generator and the wind driven generator. The hub provided by the present application comprises: a main shaft mounting end for being connected with a main shaft; a windward end arranged at one end of the hub opposite to the main shaft mounting end; and a plurality of blade mounting portions uniformly distributed on the hub along a circumferential direction of an axial line of the hub. The hub is provided with a first split surface, and the first split surface divides the hub into a first primary split part and a second primary split part which are independent of each other. The first primary split part is provided with at least one second split surface, and the second split surface divides the first primary split part into at least two secondary split parts which are independent of each other along the axial line direction of the hub. The hub of the wind driven generator and the wind driven generator provided by the present application have high strength, and can overcome the problem of transportation difficulty.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment technology, and in particular to a hub and a wind turbine generator. Background Technology

[0002] The hub of a wind turbine is an important component of the wind turbine. The hub is connected to the blades and the main shaft of the wind turbine. Driven by wind energy, the blades drive the hub to rotate, which in turn drives the main shaft to rotate. The main shaft then drives the power generation equipment to convert kinetic energy into electrical energy.

[0003] In order to install the hub, main shaft, and blades, the first end (large end) of the hub is provided with a main shaft connection part, and multiple blade mounting parts are provided on the hub. The multiple blade mounting parts are evenly distributed on the outer circumferential surface of the hub with the hub axis as the center. The second end of the hub, which is opposite to the first end, is the windward end, which constitutes the small end of the hub.

[0004] Due to the large size of the wheel hub, to facilitate manufacturing and transportation, related technologies have incorporated three blade mounting sections. The hub is divided into three independent parts, with the interface between any two adjacent blade mounting sections serving as the dividing line. Each part has a complete blade mounting section, and the hub is manufactured and transported separately for each of the three sections. To connect the three sections, flange structures protrude outwards from the mating surfaces of any two adjacent sections. When assembling the hub, the three sections are simply joined together using these flange structures.

[0005] However, in this related technology, the large end of the main stress-bearing area of ​​the wheel hub is also divided into a split structure, which causes significant damage to the strength of the wheel hub. Moreover, the axial dimension of the wheel hub, that is, the dimension from the large end to the small end, is still large, which causes great inconvenience during transportation.

[0006] Therefore, how to solve the problems of poor hub strength and transportation difficulties of existing wind turbines has become an important technical problem for those skilled in the art to solve. Summary of the Invention

[0007] This invention provides a hub for a wind turbine and a wind turbine generator, the hub having high strength and overcoming transportation difficulties.

[0008] A first aspect of the present invention provides a hub for a wind turbine, comprising:

[0009] Spindle mounting end, used for connecting to the spindle;

[0010] The windward end is located at the end opposite to the hub and the main shaft mounting end;

[0011] Multiple blade mounting portions are provided, and they are evenly distributed circumferentially on the hub with the hub's axis as the center; wherein,

[0012] The hub is provided with a first dividing surface, which is perpendicular to the axis of the hub. The first dividing surface divides the hub into a first primary segment and a second primary segment, which are independent of each other. The first primary segment and the second primary segment are detachably connected. The windward end is located on the first primary segment, and the main shaft mounting end is located on the second primary segment.

[0013] The first primary segment is provided with at least one second dividing surface, which divides the first primary segment into at least two independent secondary segments along the axial direction of the hub. Any two adjacent secondary segments are detachably connected to each other.

[0014] According to the present invention, the hub of the wind turbine is provided with a web plate for each blade mounting portion, and the web plate is provided with a manhole for a person to pass through; the first dividing surface is located between each manhole and the main shaft mounting end.

[0015] According to the present invention, the first primary segment and the second primary segment are detachably connected by a connecting plate. The first primary segment and the second primary segment are provided with a first connecting hole at an adjacent position. The connecting plate is provided with a second connecting hole corresponding to the first connecting hole. The connector is detachably inserted into the corresponding first connecting hole and the second connecting hole.

[0016] According to the wind turbine hub provided by the present invention, the connecting plate includes a first connecting plate, which is connected to the web of the first primary segment and the second primary segment.

[0017] According to the wind turbine hub provided by the present invention, the connecting plate includes a second connecting plate, which is connected at the junction between any two adjacent blade mounting portions.

[0018] According to the wind turbine hub provided by the present invention, each of the secondary sub-parts is detachably connected by an annular connector. Each of the secondary sub-parts is provided with a third connecting hole at one end of the windward end. The annular connector is provided with a fourth connecting hole corresponding to the third connecting hole. The connector is detachably inserted into the corresponding third connecting hole and the fourth connecting hole.

[0019] According to the present invention, the hub of a wind turbine has a second dividing surface that penetrates the junction area of ​​two adjacent blade mounting portions.

[0020] According to the present invention, the hub of the wind turbine has three second dividing surfaces, which divide the first primary body into three secondary bodies.

[0021] According to the present invention, the hub of a wind turbine has a web plate with weight-reduction holes.

[0022] A second aspect of the present invention provides a wind turbine generator including a hub as described in any of the preceding claims.

[0023] The present invention provides a hub for a wind turbine, comprising a main shaft mounting end, a windward end, and a blade mounting portion. The hub body has a hollow structure. The main shaft mounting end has a main shaft mounting hole for mating with the main shaft. The windward end is positioned opposite the main shaft mounting end, i.e., the windward end and the main shaft mounting end are located at opposite ends of the hub. The blade mounting portion is used to mount the blades. Typically, a wind turbine has three blades, and correspondingly, three blade mounting portions are provided, evenly distributed circumferentially around the hub's axis. The blade mounting portion may have an annular flange, on which the blade's pitch bearing is mounted. It should be noted that the hub's axis refers to the centerline of the wind turbine's main shaft after the hub's main shaft mounting end is connected to the wind turbine's main shaft.

[0024] To facilitate manufacturing and transportation without compromising the overall strength of the hub, the hub provided by this invention has a first dividing surface perpendicular to the hub's axis. This first dividing surface divides the hub into two independent first-level segments and a second-level segment. The first and second-level segments are detachably connected. The windward end is located on the first-level segment, and the main shaft mounting end is located on the second-level segment. The second-level segment has a smaller dimension along the hub's axial direction, facilitating transportation and manufacturing.

[0025] Furthermore, the first-level segment is provided with at least one second dividing surface. This second dividing surface, along the axial direction of the wheel hub, divides the first-level segment into at least two independent second-level segments. Any two adjacent second-level segments can be detachably connected. It should be noted that the first and second dividing surfaces are virtual surfaces, not solid surfaces. The first-level segment is divided into at least two independent second-level segments by the second dividing surface. Each second-level segment is relatively small, facilitating processing and transportation. Moreover, since the overall load borne by the first-level segment is relatively smaller than that of the second-level segment, dividing the first-level segment into multiple independent second-level segments before assembly will not affect the overall structure of the wheel hub due to the smaller load borne by the first-level segment.

[0026] The wheel hub provided by this invention allows for the separate manufacturing and transportation of the second-level split component and multiple secondary split components. After transportation to the installation site, the second-level split component and multiple secondary split components are then assembled into a complete wheel hub. This design facilitates the manufacturing and transportation of the wheel hub, and the main shaft mounting end is fully preserved on the second-level split component, preventing deformation or damage to the main shaft mounting end due to excessive load. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this invention 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the wind turbine hub facing upwards in an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the state when the hub shaft mounting end of the wind turbine is facing upwards in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the wind turbine hub facing upwards in another embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the state when the hub shaft mounting end of the wind turbine is facing upwards in another embodiment of the present invention;

[0032] In the picture:

[0033] 11. First-stage split section; 111. Second-stage split section; 12. Second-stage split section; 13. Main shaft mounting end; 14. Windward end; 15. Blade mounting section; 16. Web plate; 161. Manhole; 162. Weight reduction hole; 17. First dividing surface; 18. Second dividing surface; 191. First connecting plate; 192. Second connecting plate; 20. Annular connector. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] In related technologies, in order to facilitate the manufacturing and transportation of wheel hubs, wheel hubs are usually divided into three identical parts, and the dividing surface is consistent with the axial direction of the wheel hub. Each part has a complete blade mounting part. When manufacturing and transporting the wheel hub, the three parts are manufactured and transported separately.

[0036] However, in related technologies, the main shaft mounting end of the wheel hub is also formed by splicing three separate parts, which significantly affects its structural strength. The main shaft mounting end bears a large load and is prone to deformation or damage. Moreover, the dimensions of each separate part along the axial direction of the wheel hub do not change and are equal to the axial length of the wheel hub, which still presents problems of transportation and manufacturing inconvenience.

[0037] Based on the discovery of the above-mentioned technical problems, this embodiment provides a hub for a wind turbine generator. Please refer to [reference needed]. Figures 1-4 The hub has a main shaft mounting end 13, a windward end 14, and a blade mounting part 15.

[0038] The hub body has a hollow structure, the main shaft mounting end 13 is provided with a main shaft mounting hole for cooperating with the main shaft, and the windward end 14 is arranged opposite to the main shaft mounting end 13, that is, the windward end 14 and the main shaft mounting end 13 are located at opposite ends of the hub.

[0039] The blade mounting section 15 is used to mount the blades. Typically, a wind turbine has three blades, and correspondingly, there are three blade mounting sections 15, evenly distributed circumferentially around the hub's axis. Each blade mounting section 15 may have an annular flange, on which the blade's pitch bearing is mounted. A web plate 16 may be provided inside the annular flange. The web plate 16 strengthens the overall structure of the hub. Furthermore, to facilitate personnel access to the hub, each web plate 16 may have a manhole 161 for personnel to pass through. The manhole 161 may be located at the center of the web plate 16.

[0040] To facilitate manufacturing and transportation without affecting the overall strength of the hub, the hub provided in this embodiment is provided with a first dividing surface 17. The first dividing surface 17 is perpendicular to the axis of the hub and is located between each manhole 161 and the main shaft mounting end 13. That is, the first dividing surface 17 is relatively close to the main shaft mounting end 13 and relatively far away from the windward end 14. The first dividing surface 17 divides the hub into two independent first-level sub-parts 11 and second-level sub-parts 12. The first-level sub-parts 11 and second-level sub-parts 12 are detachably connected. The manholes 161 and the windward end 14 are located on the first-level sub-parts 11, and the main shaft mounting end 13 is located on the second-level sub-parts 12. The second-level sub-parts 12 have a smaller dimension along the hub axis, which facilitates transportation and manufacturing.

[0041] Furthermore, the first primary segment 11 is provided with at least one second dividing surface 18, which divides the first primary segment 11 into at least two independent secondary segments 111 along the axial direction of the hub. Any two adjacent secondary segments 111 are detachably connected. The first primary segment 11 is divided into at least two independent secondary segments 111 by the second dividing surface 18. The size of a single secondary segment 111 is small, which facilitates processing and transportation. Moreover, since the overall load borne by the first primary segment 11 is relatively small compared to the second primary segment 12, dividing the first primary segment 11 into multiple independent secondary segments 111 before assembling them will not affect the overall structure of the hub due to the smaller load borne by the first primary segment 11.

[0042] The wheel hub provided in this embodiment allows for the separate manufacturing and transportation of the second-level segment 12 and multiple secondary segments 111. After transportation to the installation site, the second-level segment 12 and multiple secondary segments 111 are then assembled into a complete wheel hub. This arrangement facilitates the manufacturing and transportation of the wheel hub, and the main shaft mounting end 13 is fully preserved on the second-level segment 12, preventing deformation or damage to the main shaft mounting end 13 due to excessive load.

[0043] In a further embodiment, the first primary segment 11 and the second primary segment 12 are detachably connected by a connecting plate. Specifically, first connecting holes may be provided at adjacent positions of the first primary segment 11 and the second primary segment 12. Multiple first connecting holes may be provided at adjacent positions of the first primary segment 11 and the second primary segment 12, and they may be arranged in an array. The connecting plate is provided with second connecting holes corresponding one-to-one with the first connecting holes. By inserting bolts, pins, or other connecting components into the first and second connecting holes, the connecting plate can be simultaneously connected to the first primary segment 11 and the second primary segment 12, thereby connecting the first primary segment 11 and the second primary segment 12 together.

[0044] It should be noted that in this connection method, the connecting plate is close to the outer surface of the hub, and the outward extension of the connecting plate is relatively small. Compared with the existing technology where flanges are set on the mating surfaces of the various parts of the hub, which occupy more radial space and are prone to interfering with external devices, the hub provided in this embodiment occupies less space and will not interfere with external devices.

[0045] In a further embodiment, depending on the setting position, the connecting plate can be divided into a first connecting plate 191 and a second connecting plate 192. The first connecting plate 191 is connected to the web plate 16 of the first primary segment 11 and the second primary segment 12. The second connecting plate 192 is connected to the junction between any two adjacent blade mounting portions 15. It should be noted that the first dividing surface 17 divides the web plate 16 of the blade mounting portion 15 and the area between the two blade mounting portions 15 into two parts. The first connecting plate 191 is used to connect the web plate 16 of the first primary segment 11 and the second primary segment 12 together, and the second connecting plate 192 connects the junction between the blade mounting portions 15 of the first primary segment 11 and the second primary segment 12 together. When there are three blade mounting portions 15, the first primary segment 11 and the second primary segment 12 can be reliably connected together by three first connecting plates 191 and three second connecting plates 192.

[0046] The first dividing surface 17 divides the hub into a first primary segment 11 and a second primary segment 12 in the transverse direction (perpendicular to the hub axis), while the second dividing surface 18 divides the first primary segment 11 into multiple secondary segments 111 in the longitudinal direction (the plane where the hub axis is located). Specifically, the first primary segment 11 can be divided into two symmetrical secondary segments 111 by one second dividing surface 18, or the first primary segment 11 can be divided into three identical secondary segments 111 by three second dividing surfaces 18.

[0047] To reliably connect the multiple secondary sub-sections 111 together, each secondary sub-section 111 is detachably connected via an annular connector 20. The annular connector 20 is concentrically positioned with the opening at the windward end 14 of the wheel hub. Each secondary sub-section 111 has a third connecting hole at one end of the windward end 14. Multiple third connecting holes are evenly distributed circumferentially along the windward end 14. The annular connector 20 has a fourth connecting hole corresponding to each of the third connecting holes. The connector is detachably inserted into the corresponding third and fourth connecting holes. Specifically, the connector can be a bolt, pin, etc. The annular connector 20 reliably connects the multiple secondary sub-sections 111 together, and all the secondary sub-sections 111 are connected to the second primary sub-section 12 via a first connecting plate 191 and a second connecting plate 192, giving the wheel hub high integrity and ensuring its overall strength.

[0048] In a further technical solution, the aforementioned second dividing surface 18 penetrates the boundary area of ​​two adjacent blade mounting portions 15, that is, the second dividing surface 18 divides the boundary area of ​​two adjacent blade mounting portions 15 into two parts along the longitudinal direction (consistent with the hub axis), such as Figure 1 and Figure 2 As shown. Specifically, there can be one second dividing surface 18, which divides the first-level segment 11 into two identical parts. There can also be three second dividing surfaces 18, such as... Figure 3 and Figure 4 As shown, three second dividing surfaces 18 divide the first primary segment 11 into three identical parts, and each second dividing surface 18 is located at the boundary area of ​​two adjacent blade mounting parts 15. When the first primary segment 11 and the second primary segment 12 are connected by the second connecting plate 192, the same second connecting plate 192 can be simultaneously connected to two adjacent secondary segments 111 of the first primary segment 11, that is, the same second connecting plate 192 can be simultaneously connected to the second primary segment 12 and two adjacent secondary segments 111.

[0049] In the technical solution provided in this embodiment, the web plate 16 is provided with weight reduction holes 162. The weight reduction holes 162 on the web plate 16 can further reduce the weight of the wheel hub.

[0050] The following content, in conjunction with the above embodiments, provides an overall description of the hub of a wind turbine.

[0051] The hub of the wind turbine provided in this embodiment includes a main shaft mounting end 13, a windward end 14, and a blade mounting part 15.

[0052] The hub body has a hollow structure, and the main shaft mounting end 13 is provided with a main shaft mounting hole for mating with the main shaft. The main shaft is mounted in the main shaft mounting hole, and the axial direction of the hub is consistent with the axial direction of the main shaft. The windward end 14 of the hub is opposite to the main shaft mounting end 13, that is, the windward end 14 and the main shaft mounting end 13 are located at opposite ends of the hub.

[0053] The blade mounting section 15 is used to mount the blades. In this embodiment, there are three blade mounting sections 15, which are evenly distributed circumferentially around the hub's axis. Each blade mounting section 15 has an annular flange, and the blade's pitch bearing is mounted on the annular flange of the hub. A web plate 16 is provided inside the annular flange. The web plate 16 strengthens the overall structural strength of the hub. Each web plate 16 has a manhole 161 for workers to pass through. The manhole 161 can be located at the center of the web plate 16. To reduce the hub's weight, weight-reducing holes 162 are also provided on the web plate 16.

[0054] The hub is provided with a first dividing surface 17, which is perpendicular to the axis of the hub and located between each manhole 161 and the main shaft mounting end 13. The first dividing surface 17 divides the hub into a first primary segment 11 and a second primary segment 12 that are independent of each other. The first primary segment 11 and the second primary segment 12 are detachably connected. The manhole 161 and the windward end 14 are located on the first primary segment 11, and the main shaft mounting end 13 is located on the second primary segment 12.

[0055] like Figure 3 As shown, the first primary segment 11 may be provided with three second dividing surfaces 18. The three second dividing surfaces 18 divide the first primary segment 11 into three independent secondary segments 111 along the axis of the hub. Any two adjacent secondary segments 111 can be detachably connected.

[0056] Multiple first connecting holes are provided at adjacent positions of the first primary segment 11 and the second primary segment 12, and these first connecting holes are arranged in an array. A connecting plate is provided with second connecting holes corresponding one-to-one with the first connecting holes. By inserting bolts, pins, or other connecting components into the first and second connecting holes, the connecting plate is simultaneously connected to the first primary segment 11 and the second primary segment 12, thereby connecting the first primary segment 11 and the second primary segment 12 together.

[0057] Depending on their location, the connecting plates are divided into a first connecting plate 191 and a second connecting plate 192. The first connecting plate 191 is connected to the web plate 16 of the first primary segment 11 and the second primary segment 12. The second connecting plate 192 is connected to the junction between two adjacent blade mounting portions 15.

[0058] The aforementioned second dividing surface 18 penetrates the boundary area between two adjacent blade mounting portions 15. There can also be three second dividing surfaces 18, which divide the first primary segment 11 into three identical parts, with each second dividing surface 18 located at the boundary area between two adjacent blade mounting portions 15. When the first primary segment 11 and the second primary segment 12 are connected using the second connecting plate 192, the same second connecting plate 192 is simultaneously connected to two adjacent secondary segments 111 of the first primary segment 11. That is, the same second connecting plate 192 can be simultaneously connected to the second primary segment 12 and two adjacent secondary segments 111.

[0059] With this configuration, the wheel hub provided in this embodiment is manufactured and transported separately for the second-level segment 12 and multiple secondary segments 111. After being transported to the installation site, the second-level segment 12 and multiple secondary segments 111 are then assembled into a complete wheel hub. This configuration facilitates the manufacturing and transportation of the wheel hub, and the main shaft mounting end 13 is fully preserved on the second-level segment 12, preventing deformation or damage to the main shaft mounting end 13 due to excessive load.

[0060] An embodiment of the present invention also provides a wind turbine, including a hub as described in any of the above embodiments. With this configuration, the hub of the wind turbine provided in this embodiment is easy to manufacture and transport, and the main shaft mounting end 13 of the hub has high strength, avoiding the problem of deformation or damage due to excessive load. The derivation process of this beneficial effect is largely similar to the derivation process of the beneficial effects brought by the hub of the wind turbine described above, and will not be repeated here.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hub for a wind turbine, characterized in that, include: The spindle mounting end (13) is used to connect to the spindle; The windward end (14) is located at the end opposite to the hub and the main shaft mounting end (13); The blade mounting portions (15) are provided in multiple configurations and are evenly distributed circumferentially on the hub with the hub's axis as the center; wherein, The hub is provided with a first dividing surface (17), which is perpendicular to the axis of the hub. The first dividing surface (17) divides the hub into a first primary split part (11) and a second primary split part (12) that are independent of each other. The first primary split part (11) and the second primary split part (12) are detachably connected. The windward end (14) is located on the first primary split part (11), and the main shaft mounting end (13) is located on the second primary split part (12). The first primary segment (11) is provided with at least one second dividing surface (18), which divides the first primary segment (11) into at least two independent secondary segments (111) along the axial direction of the hub. Any two adjacent secondary segments (111) are detachably connected to each other. Each of the blade mounting portions (15) is provided with an annular flange, and the blade pitch bearing is mounted on the annular flange. The annular flange is provided with a web plate (16), and the web plate (16) is provided with a manhole (161) for people to pass through. The first dividing surface (17) is located between each of the manholes (161) and the main shaft mounting end (13). The first primary split portion (11) and the second primary split portion (12) are detachably connected by a connecting plate. The connecting plate includes a first connecting plate (191), which is connected to the web plate (16) of the first primary split portion (11) and the second primary split portion (12).

2. The hub of the wind turbine generator according to claim 1, characterized in that, The first primary split part (11) and the second primary split part (12) are provided with a first connecting hole at adjacent positions. The connecting plate is provided with a second connecting hole that corresponds to the first connecting hole. The connector is detachably inserted into the corresponding first connecting hole and the second connecting hole.

3. The hub of the wind turbine generator according to claim 2, characterized in that, The connecting plate includes a second connecting plate (192), which is connected to the junction between any two adjacent blade mounting parts (15).

4. The hub of the wind turbine generator according to claim 1, characterized in that, Each of the secondary sub-parts (111) is detachably connected to each other via an annular connector (20). Each of the secondary sub-parts (111) is provided with a third connecting hole at one end of the windward end (14). The annular connector (20) is provided with a fourth connecting hole corresponding to the third connecting hole. The connector is detachably inserted into the corresponding third connecting hole and the fourth connecting hole.

5. The hub of the wind turbine generator according to any one of claims 1-4, characterized in that, The second dividing surface (18) penetrates the boundary area of ​​two adjacent blade mounting portions (15).

6. The hub of the wind turbine generator according to claim 5, characterized in that, There are three second dividing surfaces (18), and the three second dividing surfaces (18) divide the first primary body (11) into three secondary bodies (111).

7. The hub of the wind turbine generator according to claim 1, characterized in that, The web plate (16) is provided with weight reduction holes (162).

8. A wind turbine generator, characterized in that, Including the hub of a wind turbine as described in any one of claims 1-7.

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