Rack and wind generating set

Abstract

The invention relates to a rack and a wind generating set, the rack comprises a base and a bearing seat, the base comprises a base body and a supporting body arranged on the base body, the base body comprises a flange used for being connected with a yaw assembly of the wind generating set, and the bearing seat is arranged on the side, away from the base body, of the supporting body; the bearing seat comprises a bearing seat body, a first bearing mounting part and a second bearing mounting part, wherein the first bearing mounting part and the second bearing mounting part are distributed in the bearing seat body at intervals in the first direction. The supporting body comprises a first supporting wall and a second supporting wall, the first supporting wall is supported on the first bearing mounting part and forms a first connecting area at the connecting position of the flange, and the second supporting wall is supported on the second bearing mounting part and forms a second connecting area at the connecting position of the flange; the first connecting area and the second connecting area are asymmetrically arranged relative to a vertical plane passing through the center of the flange in the first direction. According to the rack, the force transmission path from the rack to the yaw assembly can be optimized, and the reliability of force transmission is improved.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a frame and a wind turbine generator set. Background Technology

[0002] A wind turbine generator set is a device that converts wind energy into electrical energy. The transmission system is the core component of the unit, responsible for realizing the entire energy conversion. As a key component supporting the transmission system, the frame bears the most complex loads and is one of the most difficult components to design.

[0003] The rack base includes a yaw flange, which connects to the yaw assembly and transfers the load from the impeller to the tower system. However, the existing force transmission path of the rack is not optimal, and how to better achieve force transmission from the rack to the yaw assembly is an urgent problem to be solved. Summary of the Invention

[0004] This application provides a frame and a wind turbine generator set that can optimize the force transmission path from the frame to the yaw component and improve the reliability of force transmission.

[0005] On one hand, according to an embodiment of this application, a frame is proposed, including: a base, including a base body and a support body disposed on the base body, the base body including a flange for connecting to the yaw component of a wind turbine generator; a bearing housing, disposed on the side of the support body away from the base body, the bearing housing including a bearing housing body and a first bearing mounting portion and a second bearing mounting portion spaced apart in the bearing housing body along a first direction; wherein, the support body includes a first support wall and a second support wall, the first support wall supports the first bearing mounting portion and forms a first connection area at the connection position of the flange, the second support wall supports the second bearing mounting portion and forms a second connection area at the connection position of the flange, the first connection area and the second connection area are asymmetrically arranged relative to the vertical plane passing through the center of the flange in the first direction.

[0006] According to one aspect of the embodiments of this application, the first connection area has a first force transmission line, the first force transmission line being equidistant from the outer edge and inner edge of the first connection area in the radial direction; the second connection area has a second force transmission line, the second force transmission line being equidistant from the outer edge and inner edge of the second connection area in the radial direction, and there is a difference between the minimum radial distance D1 between the first force transmission line and the center of the flange and the minimum radial distance D2 between the second force transmission line and the center of the flange.

[0007] According to one aspect of the embodiments of this application, a first force flow transmission line in the first connection region extends along a first arcuate path, and / or a second force flow transmission line in the second connection region extends along a second arcuate path.

[0008] According to one aspect of the embodiments of this application, the first arc-shaped path is concentrically arranged with the flange, or the first arc-shaped path is eccentrically arranged relative to the flange along a first direction.

[0009] According to one aspect of the embodiments of this application, the second arcuate path is concentrically arranged with the flange, or the second arcuate path is eccentrically arranged relative to the flange along the first direction.

[0010] According to one aspect of the present application, the support body further includes intermediate support walls located on both radial sides of the bearing housing body, the intermediate support walls being connected to the bearing housing body and forming a third connection area at their connection positions on the flange; the third connection area transitionally connects the first connection area and the second connection area, and forms a closed annular structure.

[0011] According to one aspect of the embodiments of this application, along the circumference of the flange, the minimum radial distance between the third force transmission line of the third connection area and the center of the flange is gradually varied, and the distance of the third force transmission line from the outer edge and the inner edge of the third connection area in the radial direction is equal.

[0012] According to one aspect of the embodiments of this application, the base body further includes a bracket, which is disposed on the outer wall surface or the inner wall surface of the flange. The bracket is provided with a plurality of mounting holes at intervals along the circumference of the flange, and the mounting holes are used to connect the yaw drive.

[0013] According to one aspect of the embodiments of this application, the flange includes a first mating portion and a second mating portion arranged radially, the first mating portion being used to mate with one of a bearing and a braking device, and the second mating portion being located radially inside the first mating portion and used to mate with the other of the bearing and the braking device; a first connecting area is at least partially located in the first mating portion, and a second connecting area is at least partially located in the second mating portion.

[0014] According to one aspect of the embodiments of this application, the bearing housing and the base are an integral structure.

[0015] On the other hand, according to an embodiment of this application, a wind turbine generator set is proposed, including: a frame as described in the above embodiment; a yaw system connected to a flange of the base body of the frame; and an impeller disposed at one end of a bearing seat of the frame.

[0016] The frame provided in this application embodiment includes a first support wall and a second support wall. The first support wall supports a first bearing mounting portion, and the second support wall supports a second bearing mounting portion. This allows the load of the first bearing mounting portion to be transferred to the first connection area of ​​the flange via the first support wall, and the load of the second bearing mounting portion to be transferred to the second connection area of ​​the flange via the second support wall. Since the bearing housing is affected by the gravity load of the impeller and wind load, by asymmetrically arranging the first and second connection areas relative to the vertical plane passing through the center of the flange in the first direction, the force flow transmission path can be designed separately according to the off-center load conditions of the first and second bearing mounting portions. This allows the load to be more reliably transferred to the yaw assembly via the flange, improving the reliability of force transmission. Attached Figure Description

[0017] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set in some embodiments of this application;

[0019] Figure 2 This is a first structural schematic diagram of the rack in some embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the second structure of the rack in some embodiments of this application;

[0021] Figure 4 This is a bottom view of the rack in some embodiments of this application;

[0022] Figure 5 This is a bottom view of the rack in some other embodiments of this application.

[0023] In the attached image:

[0024] 100 - Wind turbine generator set; 110 - Tower; 120 - Yaw assembly; 130 - Nacelle; 140 - Frame; 150 - Rotor; 160 - Main shaft; 170 - Gearbox; 180 - Generator;

[0025] 1-Base; 11-Base body; 111-Flange; 1111-First mating part; 1112-Second mating part; 112-Bracket; 1121-Mounting hole; 12-Support body; 121-First support wall; 122-Second support wall; 123-Intermediate support wall; 2-Bearing housing; 21-Bearing housing body; 22-First bearing mounting part; 23-Second bearing mounting part;

[0026] A1 - First connection area; A2 - Second connection area; A3 - Third connection area;

[0027] X - First direction;

[0028] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0029] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0030] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the frame or wind turbine generator set of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] To better understand the technical solution of this application, the following is in conjunction with the appendix. Figures 1 to 5 The frame and wind turbine generator set in the embodiments of this application will be described.

[0032] Please see Figure 1 , Figure 1 The diagram shows a structural schematic of a wind turbine generator set 100 according to some embodiments of this application. Embodiments of this application provide a wind turbine generator set 100, including a tower 110, a yaw assembly 120, a nacelle 130, and a transmission assembly, with the nacelle 130 disposed on top of the tower 110.

[0033] The transmission assembly includes a frame 140, an impeller 150, a main shaft 160, a gearbox 170, and a generator 180. The frame 140 is housed within a nacelle 130 and includes a connected bearing housing 2 and a base body 11. The bearing housing 2 includes a bearing housing body 21 and a first bearing mounting portion 22 and a second bearing mounting portion 23 axially disposed within the bearing housing body 21. The base body 11 is connected to the tower 110 via a yaw assembly 120. The impeller 150 includes a hub and multiple blades connected to the hub. The impeller 150 is connected to the input end of the main shaft 160 via the hub. The main shaft 160 is mounted on the bearing housing 2 via the first bearing mounting portion 22 and the second bearing mounting portion 23. The first bearing mounting portion 22 is located near the impeller 150, and the second bearing mounting portion 23 is located near the gearbox 170. The output end of the main shaft 160 is connected to the shaft of the generator 180 via the gearbox 170. When wind force acts on the blades, the blades drive the entire impeller 150 to rotate, and are directly or indirectly connected to the generator 180 through the main shaft 160, so that the shaft of the generator 180 rotates to convert wind energy into electrical energy.

[0034] During the operation of the wind turbine generator set 100, the bearing housing 2 bears the rotor load, which is then transferred from the yaw assembly 120 to the tower 110 via the base body 11. In the existing frame 140, the base body 11 is connected to the yaw assembly 120 via a flange 111. Along the circumference of the flange 111, the force transmission position of the base body 11 is located on the same pitch circle concentric with the flange, so that the force of the frame 140 can be evenly transmitted to the tower 110.

[0035] However, the applicant discovered through research that, since the impeller 150 has a certain weight, the bearing housing 2 is affected by the gravity load of the impeller 150 at one end and the wind load, etc. The bearing housing 2 is subjected to balancing forces, which causes the load borne by the first bearing mounting part 22 and the second bearing mounting part 23 to be different. The aforementioned force flow transmission position of the base body 11 cannot reliably realize the force transmission requirements from the base body 11 to the yaw component 120, which will affect the performance of the wind turbine generator set 100.

[0036] In order to better realize the force transmission from the frame 140 to the yaw assembly 120, this application provides a novel frame 140. The frame 140 can be used in the wind turbine generator set 100 of the above embodiments, especially the large megawatt wind turbine generator set 100 and as a component of the wind turbine generator set 100. Of course, it can also be produced or sold separately as an independent component.

[0037] Please refer to the following: Figures 1 to 4 , Figure 2 and Figure 3 The diagram shows a structural schematic of the rack 140 in some embodiments of this application. Figure 4 A bottom view of the rack 140 in some embodiments of this application is shown.

[0038] The frame 140 provided in this embodiment includes a base 1 and a bearing housing 2. The base 1 includes a base body 11 and a support body 12 disposed on the base body 11. The base body 11 includes a flange 111 for connecting to the yaw assembly 120 of the wind turbine generator set 100. The bearing housing 2 is disposed on the side of the support body 12 away from the base body 11. The bearing housing 2 includes a bearing housing body 21 and a first bearing mounting portion 22 and a second bearing mounting portion 23 distributed at intervals along a first direction X within the bearing housing body 21. The support body 12 includes a first support wall 121 and a second support wall 122. The first support wall 121 supports the first bearing mounting portion 22 and forms a first connection area A1 at the connection position of the flange 111. The second support wall 122 supports the second bearing mounting portion 23 and forms a second connection area A2 at the connection position of the flange 111. The first connection area A1 and the second connection area A2 are asymmetrically arranged relative to the vertical plane passing through the center of the flange 111 in the first direction X.

[0039] In this embodiment, the frame 140 and support body 12 include a first support wall 121 and a second support wall 122. The first support wall 121 supports the first bearing mounting portion 22, and the second support wall 122 supports the second bearing mounting portion 23. This allows the load of the first bearing mounting portion 22 to be transmitted through the first support wall 121 to the first connection area A1 of the flange 111, and the load of the second bearing mounting portion 23 to be transmitted through the second support wall 122 to the second connection area A2 of the flange 111. Since the bearing housing 2 is affected by the gravity load of the impeller 150 and wind load, by making the first connection area A1 and the second connection area A2 asymmetrically arranged relative to the vertical plane passing through the center of the flange 111 in the first direction X, the asymmetrical force flow transmission path caused by the off-center load of the first bearing mounting portion 22 and the second bearing mounting portion 23 can be adapted. This allows the load to be transmitted more reliably to the yaw assembly 120 through the flange 111, improving the reliability of force transmission.

[0040] It is understood that the first support wall 121 refers to the wall supporting the first bearing mounting part 22, the first connection area A1 is the force transmission area of ​​the first bearing mounting part 22 on the flange 111, the second support wall 122 refers to the wall supporting the second bearing mounting part 23, and the second connection area A2 is the force transmission area of ​​the second bearing mounting part 23 on the flange 111. Both the first connection area A1 and the second connection area A2 extend along the circumference of the flange 111 at a predetermined angle. The angles of the first connection area A1 and the second connection area A2 may be the same or different, and their specific angle range is related to the positions of the first and second bearings; this application does not specifically limit this. For example, both the first connection area A1 and the second connection area A2 extend by 180 degrees, forming an integral support area.

[0041] It should be understood that the asymmetrical arrangement of the first connection area A1 and the second connection area A2 in the first direction X relative to the vertical plane passing through the center of the flange 111 in this embodiment means that the radial connection positions of the first support wall 121 and the second support wall 122 on the flange 111 are different on both sides of the flange 111 in the first direction X. The first connection area A1 and the second connection area A2 are not located on the same pitch circle concentric with the flange 111. Instead, the positions of the first connection area A1 and the second connection area A2 are adjusted according to the off-center load of the first bearing mounting part 22 and the second bearing mounting part 23, so as to optimize the overall load transmission path of the frame 140 and better meet the load-bearing requirements of the large megawatt wind turbine generator set 100.

[0042] In some optional embodiments, the first connection area A1 has a first force transmission line, which is equidistant from the outer and inner edges of the first connection area A1 in the radial direction; the second connection area A2 has a second force transmission line, which is equidistant from the outer and inner edges of the second connection area A2 in the radial direction; and there is a difference between the minimum radial distance D1 between the first force transmission line and the center of the flange 111 and the minimum radial distance D2 between the second force transmission line and the center of the flange 111.

[0043] When the load borne by the bearing housing is transmitted to the flange through the support body 12, a force flow transmission surface is formed at the radial center position of the inner and outer walls of the support body 12. Correspondingly, a first force flow transmission line is formed in the first connection area A1, and a second force flow transmission line is formed in the second connection area A2. By adopting the principle that there is a difference between the minimum radial distance D1 between the first force flow transmission line and the center of the flange 111 and the minimum radial distance D2 between the second force flow transmission line and the center of the flange 111, that is, by adjusting the position of the first support wall 121 and the second support wall 122 on the flange 111, the off-center load of the first bearing mounting part 22 and the second bearing mounting part 23 can be accommodated, thereby optimizing the overall load transmission path of the frame 140 and better meeting the load-bearing requirements of the large-megawatt wind turbine generator set 100.

[0044] In some embodiments, both the first force flow transmission line and the second force flow transmission line extend along an arcuate trajectory. The first force flow transmission line may extend along an arc with varying curvature or along an arc with the same curvature. Similarly, the second force flow transmission line may extend along an arc with varying curvature or along an arc with the same curvature.

[0045] In some embodiments, when the first force transmission line extends along an arc with a first curvature and the second force transmission line extends along an arc with a second curvature, the first curvature and the second curvature may be the same or different. In this case, at least one of the arcs extending from the first or second force transmission line can be eccentrically positioned with respect to the flange, thereby accommodating the off-center loads of the first bearing mounting portion 22 and the second bearing mounting portion 23, and optimizing the overall load transmission path of the frame 140.

[0046] Since both the first support wall 121 and the second support wall 122 have a certain thickness, the thicknesses of the first support wall 121 and the second support wall 122 can be the same or different. When the thicknesses of the first support wall 121 and the second support wall 122 are different, in addition to ensuring that the outer edges of the first connecting area A1 and the second connecting area A2 are not located on the same pitch circle concentrically set with the flange 111, the positions of the first support wall 121 and the second support wall 122 on the flange 111 can be adjusted so that at least part of the inner edges of the first connecting area A1 and at least part of the inner edges of the second connecting area A2 are not located on the same pitch circle concentrically set with the flange 111. This optimizes the overall load transfer path of the frame 140, thereby better meeting the load-bearing requirements of the large-megawatt wind turbine generator set 100.

[0047] By setting the radial distance between the first force transmission line of the first connection area A1 and the center of the flange 111 to D1, and the radial distance between the second force transmission line of the second connection area A2 and the center of the flange 111 to D2, it means that the radial distance between any point on the first force transmission line of the first connection area A1 and the center of the flange 111 is greater than the radial distance between any point on the second force transmission line of the second connection area A2 and the center of the flange 111, or the radial distance between any point on the second force transmission line of the second connection area A2 and the center of the flange 111 is greater than the radial distance between any point on the first force transmission line of the first connection area A1 and the center of the flange 111. This allows for better adaptation of the force transmission paths of the first support wall 121 and the second support wall 122 to the first bearing mounting part 22 and the second bearing mounting part 23, thereby improving the reliability of force transmission.

[0048] Please see Figures 2 to 5 As an optional implementation, flange 111 includes a first mating portion 1111 and a second mating portion 1112 arranged radially. The first mating portion 1111 is used to mate with one of a bearing and a braking device, and the second mating portion 1112 is located radially inside the first mating portion 1111 and is used to mate with the other of the bearing and the braking device. A first connecting area A1 is at least partially located in the first mating portion 1111, and a second connecting area A2 is at least partially located in the second mating portion 1112.

[0049] Taking the first mating part 1111 used to mate with the bearing and the second mating part 1112 used to mate with the braking device as an example.

[0050] Since the first bearing mounting part 22 is located close to the impeller 150, it bears a large load. Therefore, by making the first connection area A1 at least partially located in the first mating part 1111, the load borne by the first bearing mounting part 22 can be transmitted through the first support wall 121 to the first mating part 1111 of the flange 111, and then to the bearing of the yaw assembly 120, so as to form a force flow transmission path on the side of the first bearing mounting part 22, which meets the force flow transmission requirements of a large load.

[0051] Because the second bearing mounting portion 23 is located away from the impeller 150, and under the influence of gravity load and wind load on the impeller 150, the side of the frame 140 away from the impeller 150 along the first direction X will be subjected to a balancing force, causing a gap to form between the first mating portion 1111 of the flange 111 and the bearing of the yaw assembly 120, thus affecting the force transmission effect of the first mating portion 1111 of the flange 111 and the bearing of the yaw assembly 120. Therefore, in the embodiment of this application, the frame 140, by having the second connecting area A2 at least partially located at the second mating portion 1112, can transmit the load borne by the second bearing mounting portion 23 to the second mating portion 1112 of the flange 111 through the second support wall 122, and to the braking device of the yaw assembly 120, thereby forming a force flow transmission path on the side of the second bearing mounting portion 23, so that the load can be reliably transmitted from the braking device to the tower 110, thereby optimizing the load transmission path according to the off-center load of the first bearing mounting portion 22 and the second bearing mounting portion 23.

[0052] As an optional implementation, the first connection area A1 is located in the first mating part 1111, and the second connection area A2 is located in the second mating part 1112, so as to simplify the setting of the first connection area A1 and the second connection area A2 and improve the reliability of force transmission.

[0053] Optionally, the first mating part 1111 can be configured as a gasket groove, and the second mating part 1112 can be configured as a bolt hole. The gasket groove is used to install bearing gaskets, and the bolt hole is used to install braking devices. There are multiple gasket grooves distributed circumferentially on the flange 111; they can be uniformly or non-uniformly distributed. The pitch circle diameter of the first mating part 1111 depends on the selection of the yaw sliding bearing. Similarly, there are multiple bolt holes distributed circumferentially on the flange 111; they can be uniformly or non-uniformly distributed. The pitch circle diameter of the second mating part 1112 depends on the selection of the braking device.

[0054] The minimum radial distance between the first force transmission line of the first connection area A1 and the center of the flange 111, and the minimum radial distance between the second force transmission line of the second connection area A2 and the center of the flange 111, can be adjusted according to the pitch circle diameter of the first mating part 1111 and the second mating part 1112, so that the first connection area A1 is at least partially located in the first mating part 1111, and the second connection area A2 is at least partially located in the second mating part 1112.

[0055] Please see Figure 4 and Figure 5 , Figure 5A bottom view of the rack 140 in some other embodiments of this application is shown. In some alternative embodiments, the first connection area A1 extends along a first arcuate path, and / or the second connection area A2 extends along a second arcuate path.

[0056] By extending the first connection area A1 and the second connection area A2 along an arc-shaped trajectory, they can be adapted to the flange 111. Furthermore, the first support wall 121 and the second support wall 122 themselves are also arranged in an arc-shaped transition, which reduces stress concentration and improves the reliability of force transmission.

[0057] When the first connection area A1 extends along the first arc-shaped path, in some optional embodiments, the first arc-shaped path is concentric with the flange 111, or the first arc-shaped path is eccentrically positioned relative to the flange 111 along the first direction X. The second arc-shaped path is concentric with the flange 111, or the second arc-shaped path is eccentrically positioned relative to the flange 111 along the first direction X.

[0058] It is understandable that the first arc path and the second arc path can be designed independently. For example, both the first arc path and the second arc path can be set concentrically with flange 111, or both the first arc path and the second arc path can be set eccentrically relative to flange 111. The eccentric directions of the two can be the same or different. Alternatively, one of the first arc path and the second arc path can be set concentrically with flange 111, and the other can be set eccentrically with flange 111.

[0059] To simplify the structure of the first and second arc paths, as an optional implementation, both the first and second arc paths are concentrically arranged with the flange 111, and the radii of the first and second arc paths differ, so that the first connection area A1 and the second connection area A2 are asymmetrically arranged along the first direction X relative to the vertical plane passing through the center of the flange 111.

[0060] As another alternative implementation, both the first arc path and the second arc path are eccentrically arranged relative to the flange 111. The first arc path and the second arc path may be located on the same pitch circle, but the pitch circle is eccentrically arranged on the side of the flange 111 along the first direction X, so that the first connection area A1 and the second connection area A2 are asymmetrically arranged along the first direction X relative to the vertical plane passing through the center of the flange 111.

[0061] In some alternative embodiments, the support body 12 further includes intermediate support walls 123 located on both radial sides of the bearing housing body 21. The intermediate support walls 123 are connected to the bearing housing body 21 and their connection positions on the flange 111 form a third connection area A3. The third connection area A3 transitionally connects the first connection area A1 and the second connection area A2, forming a closed ring structure.

[0062] By transitioning the connection position of the intermediate support wall 123 on the flange 111 to the first connection area A1 and the second connection area A2, stress concentration can be avoided. Furthermore, the transition of the connection position of the support wall on the flange 111 can be achieved according to the off-center load of the first bearing mounting part 22 and the second bearing mounting part 23, thereby further optimizing the overall load transfer path of the frame 140 and better meeting the load-bearing requirements of the large-megawatt wind turbine generator set 100.

[0063] For the third connection area A3, it can be located partly in the first mating part 1111 and partly in the second mating part 1112, or both in the first mating part 1111 or both in the second mating part 1112. Its specific position can be adjusted according to the bearing capacity of the bearing housing body 21.

[0064] In some alternative embodiments, the radial distance between the third force transmission line of the third connection area A3 and the center of the flange 111 is gradually changed along the circumference of the flange 111, and the distance of the third force transmission line from the outer edge and the inner edge of the third connection area A3 in the radial direction is equal.

[0065] The radial distance between the third force transmission line of the third connection area A3 and the center of the flange 111 is gradually changed, which means that the third connection area A3 can be gradually changed from the first connection area A1 to the second connection area A2 as a whole, or the third connection area A3 can be gradually changed only locally.

[0066] Optionally, the third connection area A3 extends along the third arc-shaped path to facilitate a smoother transition between the first connection area A1 and the second connection area A2. When the third connection area A3 is only partially and gradually transitioned, for example, the third arc-shaped path may include a first sub-path, a second sub-path, and a third sub-path arranged circumferentially on the flange 111. When the first arc-shaped path and the second arc-shaped path are concentric, the first sub-path and the first arc-shaped path are connected and have the same radius as the first arc-shaped path, the second sub-path and the second arc-shaped path are connected and have the same radius as the second arc-shaped path, and the third sub-path transitions between the first sub-path and the second sub-path to achieve a transition in the connection position of the support wall on the flange 111.

[0067] That is, the angular range of the first sub-path, the second sub-path and the third sub-path relative to the flange 111 in the circumferential direction can be adjusted according to the load-bearing capacity of the frame 140, and this application does not make specific limitations in this regard.

[0068] In some alternative embodiments, the base body 11 further includes a bracket 112, which is disposed on the outer wall surface of the flange 111 or the inner wall surface of the flange 111. The bracket 112 is provided with a plurality of mounting holes 1121 at intervals along the circumference of the flange 111. The mounting holes 1121 are used to connect the yaw drive.

[0069] The bracket 112 can adopt a single-layer lightweight design, and the design thickness is determined according to the strength verification results. The mounting holes 1121 are used to install the yaw drive, and the mounting holes 1121 are arranged evenly around the base body 11.

[0070] It is understood that the frame 140 in this embodiment can be applied to the wind turbine generator 100 in the upwind direction or the wind turbine generator 100 in the leeward direction, and can be applied to the inward yaw structure or the outward yaw structure. Depending on the location of the support 112, the positions of the first mating part 1111 and the second mating part 1112 will also be adjusted accordingly. The positions of the first connecting area A1, the second connecting area A2, and the third connecting area A3 can also be adjusted to meet the requirement that the first connecting area A1 is located at the first mating part 1111, the second connecting area A2 is located at the second mating part 1112, and the third connecting area A3 transitionally connects the first connecting area A1 and the second connecting area A2.

[0071] In some alternative embodiments, the bearing housing 2 and the base 1 are an integral structure.

[0072] The frame 140 can be formed by casting. The load of the bearing seat 2 can be directly transferred to the flange 111 of the base body 11 through the support body 12. The bearing seat 2 and the base 1 can be an integral structure, which is conducive to the forming of the support body 12 and can ensure the connection strength between the bearing seat 2 and the support body 12, as well as between the support body 12 and the base body 11.

[0073] The frame 140 in this embodiment of the application transmits the load of the first bearing mounting part 22 to the first mating part 1111 of the flange 111 through the first support wall 121, and transmits the load of the second bearing mounting part 23 to the second mating part 1112 of the flange 111 through the second support wall 122, and connects the first support wall 121 and the second support wall 122 through the intermediate support wall 123, thereby optimizing the load transmission path of the frame 140 and improving the reliability of force transmission.

[0074] The wind turbine generator set 100 of this application includes the frame 140 of any of the above embodiments, and therefore also has the advantages of simple structure and reliable load transmission path, which better meets the load requirements of large megawatt wind turbine generator set 100.

[0075] This application also provides a wind farm using the wind turbine generator sets described in the above embodiments. Because it includes the aforementioned wind turbine generator sets, the wind farm of this application has higher economic efficiency.

[0076] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A nacelle for a wind power generator unit, c h a r a c t e r i s e d in that include: The base (1) includes a base body (11) and a support (12) disposed on the base body (11), the base body (11) including a flange (111) for connecting to the yaw assembly (120) of the wind turbine generator set (100); The bearing housing (2) is disposed on the side of the support body (12) away from the base body (11). The bearing housing (2) includes a bearing housing body (21) and a first bearing mounting part (22) and a second bearing mounting part (23) distributed at intervals along a first direction (X) within the bearing housing body (21). The support body (12) includes a first support wall (121) and a second support wall (122). The first support wall (121) is supported on the first bearing mounting part (22) and forms a first connection area (A1) at the connection position of the flange (111). The second support wall (122) is supported on the second bearing mounting part (23) and forms a second connection area (A2) at the connection position of the flange (111). The first connection area (A1) and the second connection area (A2) are asymmetrically arranged in the first direction (X) relative to the vertical plane passing through the center of the flange (111).

2. The gantry (140) of claim 1, characterized in that The first connection area (A1) has a first force transmission line, which is equidistant from the outer and inner edges of the first connection area in the radial direction; the second connection area (A2) has a second force transmission line, which is equidistant from the outer and inner edges of the second connection area in the radial direction; and there is a difference between the minimum radial distance D1 between the first force transmission line and the center of the flange (111) and the minimum radial distance D2 between the second force transmission line and the center of the flange (111).

3. The rack of claim 1, wherein, The first force transmission line of the first connection area (A1) extends along a first arc-shaped path, and / or the second force transmission line of the second connection area (A2) extends along a second arc-shaped path.

4. The rack of claim 3, wherein, The first arc-shaped path is concentrically arranged with the flange (111), or the first arc-shaped path is eccentrically arranged relative to the flange (111) along the first direction (X).

5. The rack of claim 4, wherein, The second arc-shaped path is concentrically arranged with the flange (111), or the second arc-shaped path is eccentrically arranged relative to the flange (111) along the first direction (X).

6. The rack of any one of claims 3 to 5, wherein, The support (12) also includes intermediate support walls (123) located on both radial sides of the bearing housing body (21), the intermediate support walls (123) being connected to the bearing housing body (21) and forming a third connection area (A3) at their connection position on the flange (111); The third connection region (A3) transitions between the first connection region (A1) and the second connection region (A2), forming a closed ring structure.

7. The rack of claim 6, wherein, Along the circumference of the flange (111), the minimum radial distance between the third force transmission line of the third connection area (A3) and the center of the flange (111) gradually changes, and the distance of the third force transmission line from the outer edge and the inner edge of the third connection area in the radial direction is equal.

8. The rack of claim 1, wherein, The base body (11) also includes a bracket (112), which is disposed on the outer wall surface of the flange (111) or the inner wall surface of the flange (111). The bracket (112) is provided with a plurality of mounting holes (1121) spaced apart along the circumference of the flange (111). The mounting holes (1121) are used to connect the yaw drive.

9. The rack of claim 1, wherein, The flange (111) includes a first mating part (1111) and a second mating part (1112) arranged radially. The first mating part (1111) is used to mate with one of a bearing and a braking device, and the second mating part (1112) is located radially inside the first mating part (1111) and is used to mate with the other of a bearing and a braking device. The first connecting region (A1) is at least partially located in the first mating portion (1111), and the second connecting region (A2) is at least partially located in the second mating portion (1112).

10. The rack of claim 1, wherein, The bearing housing (2) and the base (1) are an integral structure.

11. A wind power unit, characterized in that include: The rack (140) as described in any one of claims 1-10; The yaw system is connected to the flange (111) of the base body (11) of the frame (140); An impeller (150) is disposed at one end of the bearing housing (2) of the frame (140).

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