Connecting brackets, transmission system and wind turbine generator set

Abstract

This utility model provides a connecting bracket, a transmission system, and a wind turbine generator set. The connecting bracket is used in a transmission system including a generator and a gearbox. The connecting bracket is annular and is disposed within the axial inner cavity of the generator rotor, connecting the rotor support and the output shaft of the gearbox. A notch is provided on the outer periphery of the connecting bracket, extending through the axial thickness of the connecting bracket. The connecting bracket can extend into a rotor support with a smaller inner diameter to connect the rotor and the output shaft of the gearbox, thus increasing the applicability of the connecting bracket.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, specifically to a connecting bracket, a transmission system, and a wind turbine generator set. Background Technology

[0002] The transmission system of a wind turbine generator typically includes a gearbox and a generator. The output shaft of the gearbox is connected to the rotor support of the generator rotor via a connecting bracket. The rotation of the blades drives the output shaft of the gearbox to rotate, which in turn drives the rotor to rotate, thus generating electricity.

[0003] Specifically, the connecting bracket is ring-shaped and extends into the rotor bracket to connect the output shaft of the gearbox and the rotor bracket. However, for rotor brackets with small inner diameters, it is difficult for the connecting bracket to extend into them for the corresponding connection, and the applicable range of the connecting bracket is small. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a connecting bracket, a transmission system, and a wind turbine generator set. The connecting bracket can extend into a rotor bracket with a smaller inner diameter to connect the rotor and the output shaft of the gearbox, thereby improving the applicability of the connecting bracket.

[0005] A first aspect of this utility model provides a connecting bracket for use in a transmission system including a generator and a gearbox. The outer contour of the connecting bracket is annular and is disposed in the axial inner cavity of the generator rotor to connect the rotor bracket of the rotor and the output shaft of the gearbox. A notch is provided on the outer periphery of the connecting bracket, and the notch extends through the axial thickness of the connecting bracket.

[0006] Furthermore, in some embodiments, the rotor support includes a hollow shaft, a first connecting flange connected to an axial first end of the hollow shaft, and a second connecting flange connected to an axial second end of the hollow shaft. The connecting support is used to connect the output shaft of the gearbox to the first connecting flange, and the notch portion allows the radial width of the connecting support at the notch portion to be smaller than the inner diameter of the second connecting flange. The notch portion is slit-shaped with a planar cross-section, or it is a groove recessed towards the center of the connecting support.

[0007] Furthermore, in some embodiments, the number of notches is even, and they are symmetrically distributed around the center of the connecting bracket.

[0008] Furthermore, in some embodiments, the connecting bracket includes: a bracket body, the bracket body being annular, with a plurality of first connecting holes circumferentially distributed near its outer edge for a first connector to pass through and connect to the rotor bracket, the notch including a first notch formed on the bracket body, the plurality of first connecting holes avoiding the first notch; and an insulating component disposed at the first connecting holes for insulatingly separating the first connector from the bracket body.

[0009] Furthermore, in some embodiments, the insulating component includes: an insulating sleeve located in the first connecting hole for fitting onto the first connector; a first insulating plate disposed on the first axial side of the support body corresponding to the first connecting hole; and a second insulating plate disposed on the second axial side of the support body corresponding to the first connecting hole.

[0010] Furthermore, in some embodiments, the connecting bracket further includes: a first pressure plate disposed on the outside of the first insulating plate, the first pressure plate being used to fit against the rotor bracket; and a second pressure plate disposed on the outside of the second insulating plate, the first connector being able to pass through the second pressure plate and the first pressure plate and press the first insulating plate and the second insulating plate.

[0011] Furthermore, in some embodiments, the first insulating plate, the second insulating plate, the first pressure plate, the second pressure plate, and the support body are stacked and connected to form an integral structure.

[0012] Furthermore, in some embodiments, the first notch is slit-shaped with a planar cross-section, and the support body is also provided with a first groove recessed toward the center of the support body at the first notch; the second insulating plate is spaced apart at the first groove in the circumferential direction of the connecting support; the second pressure plate is spaced apart at the first groove in the circumferential direction of the connecting support, and the second pressure plate is correspondingly pressed onto the outside of the second insulating plate.

[0013] Furthermore, in some embodiments, the first insulating plate is annular, and the notch includes a second notch formed on the first insulating plate. The first insulating plate has a second groove recessed toward the center of the first insulating plate at the second notch. The second groove corresponds to the first groove in position and has the same shape and size. The first pressure plate is annular, and the notch includes a third notch formed on the first pressure plate. The first pressure plate has a third groove recessed toward the center of the first pressure plate at the third notch. The width of the third groove is smaller than the width of the second groove in the circumferential direction of the first pressure plate. The portion of the first pressure plate protruding from the second groove has a threaded hole for disassembly.

[0014] Furthermore, in some embodiments, the support body is made of metal material, and one end of the outer periphery of the support body has a recessed first stop, an insulating layer is provided at the first stop, and a first pressure plate is provided at the first stop and in contact with the insulating layer.

[0015] Furthermore, in some embodiments, the first pressure plate is connected to the support body by a first bolt, and the second pressure plate is connected to the support body by a second bolt, wherein both the first bolt and the second bolt are non-conductive bolts.

[0016] Furthermore, in some embodiments, the outer peripheral surface of the first pressure plate is a stepped surface, and the outer diameter of the side closer to the first insulating plate is larger than the outer diameter of the side farther from the first insulating plate. The orthographic projection of the first insulating plate, the insulating sleeve, the second insulating plate, and the second pressure plate onto the first pressure plate does not extend beyond the outer edge of the first pressure plate.

[0017] Furthermore, in some embodiments, sealant is applied to the joint gaps of the components on the outer surface of the connecting bracket.

[0018] A second aspect of this utility model provides a transmission system comprising: a gearbox having an output shaft; a generator including a rotor having an axial cavity, the gearbox being located on a first axial side of the generator; and a connecting bracket as described in any of the above embodiments, the connecting bracket being insertable from a second axial side of the generator into the axial cavity to connect the output shaft of the gearbox to a rotor support of the rotor.

[0019] Furthermore, in some embodiments, the rotor support includes a hollow shaft, a first connecting flange connected to the first axial end of the hollow shaft, and a second connecting flange connected to the second axial end of the hollow shaft. The connecting support connects the output shaft of the gearbox to the first connecting flange. The outer diameter of the connecting support is greater than the inner diameter of the second connecting flange, and the radial width of the connecting support at the notch is smaller than the inner diameter of the second connecting flange.

[0020] A third aspect of this utility model provides a wind turbine generator set, including a transmission system as described in any of the above embodiments.

[0021] The connecting bracket provided in this embodiment of the utility model is generally annular, with a notch on the outer periphery of the connecting bracket. The radial width of the connecting bracket at the notch is smaller than the diameter corresponding to its own circumferential outer contour, which makes it easier for the connecting bracket to extend into the connecting bracket of the rotor with a smaller inner diameter at the position where the width becomes smaller, thereby improving the applicability of the connecting bracket.

[0022] The transmission system and wind turbine generator set provided in this utility model embodiment have the beneficial effects of any of the above embodiments due to the connection bracket of any of the above embodiments, which will not be described again here.

[0023] Other aspects and / or advantages of the present invention will be set forth in part in the description which follows, and in part will be clear from the description or may be learned by practice of the present invention. Attached Figure Description

[0024] The above and other objects and features of this utility model will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 A cross-sectional schematic diagram of a transmission system according to an embodiment of this application is shown;

[0026] Figure 2 A partial cross-sectional schematic diagram of a transmission system according to an embodiment of this application is shown.

[0027] Figure 3 A cross-sectional schematic diagram of a connecting bracket according to one embodiment of this application is shown;

[0028] Figure 4 A side view of a connecting bracket according to one embodiment of this application is shown;

[0029] Figure 5 A perspective view of a connecting bracket according to an embodiment of this application is shown;

[0030] Figure 6 Another side view of the connecting bracket according to one embodiment of this application is shown;

[0031] Figure 7 A cross-sectional schematic diagram of the connection position between the first pressure plate and the rotor according to an embodiment of this application is shown;

[0032] Figure 8 Another cross-sectional schematic diagram of a connecting bracket according to one embodiment of this application is shown;

[0033] Figure 9 Another cross-sectional schematic diagram of a connecting bracket according to one embodiment of this application is shown;

[0034] Figure 10 Another cross-sectional view of a connecting bracket according to one embodiment of this application is shown.

[0035] Figures 1 to 10 Explanation of icon numbers:

[0036] 100 Connecting bracket; 101 Notch; 110 Bracket body; 111 Metal bracket body; 1111 First connecting hole; 1112 First stop; 1113 Second connecting hole; 112 Insulating layer; 113 First groove; 120 First pressure plate; 121 Fourth clearance hole; 122 Third groove; 123 Threaded hole; 124 First stepped surface; 125 Second stepped surface; 130 First insulating plate; 131 Third clearance hole; 132 Second groove; 140 Insulating sleeve; 150 Second insulating plate; 151 Second clearance hole; 160 Second pressure plate; 161 First clearance hole; 170 First bolt; 180 Second bolt; 190 Connecting bolt;

[0037] 200 Rotor; 210 Rotor support; 211 Hollow shaft cylinder; 212 First connecting flange; 213 Second connecting flange; 221 Flange stop;

[0038] 300 output shaft. Detailed Implementation

[0039] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be changed as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.

[0040] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein, which will become clear upon understanding the disclosure of this application.

[0041] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0042] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.

[0043] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "bonded to" another element, the element may be directly "on" another element, directly "connected to," or "bonded to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly bonded to" another element, no other elements may be present in between.

[0044] The terminology used herein is for the purpose of describing various examples only and is not intended to limit disclosure. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.

[0045] The directional terms “above,” “below,” “top,” and “bottom” used in this application, unless otherwise specified, are based on the orientation of the product when it is in normal use.

[0046] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.

[0047] Medium-speed permanent magnet wind turbines (also known as semi-direct drive generators) are integrated with the gearbox, resulting in a compact structure. The generator rotor is supported by gearbox bearings. During generator operation, shaft voltage can be generated due to various reasons, which can damage the bearings. To protect the bearings, in addition to using insulated bearings, a common practice is to add insulation structures along the connection path between the gearbox and the generator rotor, achieving insulation isolation between the gearbox bearings and the generator rotor.

[0048] In existing technologies, a connecting bracket is typically inserted into the rotor bracket to connect the gearbox's output shaft and the rotor bracket, thereby enabling torque transmission. An insulating structure is then installed on the connecting bracket to achieve insulation isolation. However, for the connecting bracket to extend into the rotor bracket, the minimum inner diameter of the rotor bracket usually needs to be larger than the outer diameter of the connecting bracket. In other words, existing connecting brackets are only suitable for products where the minimum inner diameter of the rotor bracket is larger than the outer diameter of the connecting bracket, limiting their applicability.

[0049] Based on this, this application proposes a new connecting bracket 100, which allows the connecting bracket 100 to extend into the rotor bracket 210 with a smaller inner diameter to connect the rotor bracket 210 and the output shaft 300 of the gearbox, thereby improving the applicability of the connecting bracket 100.

[0050] The following will combine Figures 1 to 10 The present invention describes the connecting bracket 100 and the transmission system provided in the embodiments of the present invention.

[0051] like Figures 1 to 6 As shown, a first aspect of the present invention provides a connecting bracket 100 for use in a transmission system including a generator and a gearbox. The outer contour of the connecting bracket 100 is annular and is disposed in the axial inner cavity of the rotor 200 of the generator to connect the rotor bracket 210 of the rotor 200 and the output shaft 300 of the gearbox. A notch 101 is provided on the outer periphery of the connecting bracket 100, and the notch 101 penetrates the axial thickness of the connecting bracket 100.

[0052] The connecting bracket 100 provided in this embodiment is generally annular, with a notch 101 on the circumference of its outer contour. Since the notch 101 can shorten the radial width of the connecting bracket 100 at that location, the radial width of the connecting bracket 100 at that location will be smaller than the diameter corresponding to its own circumferential outer contour (hereinafter referred to as the outer diameter of the connecting bracket 100 for ease of description). This makes it easier for the connecting bracket 100 to extend into the connecting bracket 100 of the rotor 200 with a smaller inner diameter at the location where the width is reduced, without requiring the minimum inner diameter of the rotor bracket 210 to be greater than the outer diameter of the connecting bracket 100, thereby improving the applicability of the connecting bracket 100.

[0053] Moreover, the design of the notch 101 can reduce the weight of the connecting bracket 100, reduce the amount of material used in the connecting bracket 100, and save costs.

[0054] In specific applications, such as Figure 1 As shown, the rotor support 210 may include a hollow shaft cylinder 211, a first connecting flange 212 connected to the first axial end of the hollow shaft cylinder 211, and a second connecting flange 213 connected to the second axial end of the hollow shaft cylinder 211. The notch 101 allows the connecting support 100 to enter the hollow shaft cylinder 211 through the second connecting flange 213 to connect with the first connecting flange 212 and the output shaft 300. Specifically, the radial width D1 of the connecting support 100 at the notch 101 can be smaller than the inner diameter D2 of the second connecting flange 213 at the end of the rotor support 100, facilitating the entry of the connecting support 100 into the rotor support 210 from the right side shown in the figure.

[0055] As an example, such as Figures 4 to 6 As shown, the notch 101 can be slit-shaped, with its cross-section being a plane perpendicular to a diameter. Making the notch 101 slit-shaped, cut along a straight line, results in a simple structure, convenient processing, and can effectively reduce the radial width of the connecting bracket 100 at the notch 101, making it easier for the connecting bracket 100 to extend into the rotor bracket 210 with a smaller inner diameter.

[0056] As an example, the notch 101 may also be a groove recessed towards the center of the connecting bracket 100. Alternatively, the width of the connecting bracket 100 at this location may be smaller than its outer diameter.

[0057] The shape of the notch 101 can be varied and is not limited to the example above.

[0058] Furthermore, the number of notches 101 can be even, and they are symmetrically distributed around the center of the connecting bracket 100. This symmetrical arrangement of the two notches 101 can better reduce the radial width of the connecting bracket 100 at that location, making it easier for the connecting bracket 100 to adapt to a smaller rotor bracket 210. Moreover, it can prevent eccentric rotation of the connecting bracket 100, which is beneficial for the stable connection between the output shaft 300 and the rotor bracket 210 during rotation.

[0059] As an example, such as Figures 4 to 6 As shown, there are two notches 101, located at opposite ends of a diameter of the connecting bracket 100. This significantly reduces the radial width of the connecting bracket 100 in the direction of that diameter.

[0060] Of course, in other examples, the number of notches 101 can also be 4 or 6. In addition, the number of notches 101 can also be odd, as long as it can reduce the radial width of the connecting bracket 100 in the set direction.

[0061] Regarding the specific structure of the connecting bracket 100, further, in some embodiments, such as Figures 1 to 4 As shown, the connecting bracket 100 includes: a bracket body 110, which is annular in shape, and a plurality of first connecting holes 1111 are circumferentially distributed near its outer edge for the first connecting member to pass through and connect with the rotor bracket 210; a notch 101 includes a first notch formed on the bracket body 110, and the plurality of first connecting holes 1111 avoid the first notch; and an insulating component disposed at the first connecting hole 1111 for insulatingly separating the first connecting member from the bracket body 110.

[0062] In these embodiments, the notch 101 extends through the axial thickness of the connecting bracket 100. Therefore, the notch 101 includes a first notch formed on the bracket body 110, and the bracket body 110 has multiple first connecting holes 1111 in the circumferential direction to avoid the first notch, facilitating the connection of the first connector through the first connecting holes 1111 to the rotor bracket 210. Furthermore, an insulating component is provided at the first connecting hole 1111 to separate the first connector from the bracket, providing insulation and preventing the shaft voltage generated by the generator during operation from being transmitted to the gearbox via the first connector and affecting the gearbox bearings.

[0063] Furthermore, such as Figure 2 and Figure 3 As shown, the insulating assembly may include an insulating sleeve 140, a first insulating plate 130, and a second insulating plate 150. The insulating sleeve 140 is located in the first connecting hole 1111 and is used to be fitted onto the first connector. The first insulating plate 130 is disposed on the first axial side of the support body 110 corresponding to the first connecting hole 1111. The second insulating plate 150 is disposed on the second axial side of the support body 110 corresponding to the first connecting hole 1111. The insulating sleeve 140 can insulatingly isolate the first connector and the connecting bracket 100, the first insulating plate 130 can insulatingly isolate the connecting bracket 100 and the rotor bracket 210, and the second insulating plate 150 insulatingly isolates the connecting bracket 100 from the other side, providing multi-directional protection and good insulation performance.

[0064] As an example, the insulating components are made of rubber or silicone materials.

[0065] Furthermore, such as Figure 2 and Figure 3 As shown, the connecting bracket 100 may further include a first pressure plate 120 and a second pressure plate 160. The first pressure plate 120 is disposed on the outside of the first insulating plate 130 and is used to fit against the rotor bracket 210. The second pressure plate 160 is disposed on the outside of the second insulating plate 150. The first connecting member can pass through the second pressure plate 160 and the first pressure plate 120 and press against the first insulating plate 130 and the second insulating plate 150. The design of the first pressure plate 120 and the second pressure plate 160 can better press against the first insulating plate 130 and the second insulating plate 150, making them firmly fixed on the bracket body 110 and preventing them from shifting and affecting the insulation effect. Moreover, it facilitates the relatively rigid first pressure plate 120 to fit against the rotor bracket 210, improving connection stability. When the first connecting member is a connecting bolt 190, it also facilitates the relatively rigid second pressure plate 160 to press against the nut at the end of the first connecting member, improving connection stability.

[0066] As an example, the first pressure plate 120 and the second pressure plate 160 can be metal plates such as steel plates.

[0067] As an example, such as Figure 2 and Figure 3As shown, the first connecting member is a connecting bolt 190. The second pressure plate 160 has a first clearance hole 161 for the first connecting member to pass through, the second insulating plate 150 has a second clearance hole 151 for the first connecting member to pass through, the first insulating plate 130 has a third clearance hole 131 for the first connecting member to pass through, and the first pressure plate 120 has a fourth clearance hole 121 for the first connecting member to pass through. The connecting bolt 190 passes through the first clearance hole 161, the second clearance hole 151, the first connecting hole 1111, the third clearance hole 131, and the fourth clearance hole 121 in sequence and extends into the rotor support 210.

[0068] Furthermore, the first insulating plate 130, the second insulating plate 150, the first pressure plate 120, and the second pressure plate 160 can be stacked and connected with the bracket body 110 to form an integral structure. This facilitates the assembly of the various components of the connecting bracket 100, making installation and disassembly convenient.

[0069] As an example, such as Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, the first pressure plate 120 is connected to the support body 110 via the first bolt 170, and the second pressure plate 160 is connected to the support body 110 via the second bolt 180. Both the first bolt 170 and the second bolt 180 are non-conductive bolts. The connection is firm, and the bolts are made of non-conductive material, which ensures that the first pressure plate 120 and the support body 110 remain insulated from each other. This prevents the shaft voltage generated by the generator during operation from being transmitted to the gearbox via the first bolt 170 and the second bolt 180, thus preventing it from affecting the gearbox bearings.

[0070] In a specific embodiment, such as Figure 5 As shown, the first notch is slit-shaped, and its cross-section is a plane perpendicular to a diameter. The support body 110 may also be provided with a first groove 113 recessed towards the center of the support body 110 at the first notch. The second insulating plates 150 are spaced apart from the first groove 113 in the circumferential direction of the connecting support 100. The second pressure plates 160 are spaced apart from the first groove 113 in the circumferential direction of the connecting support 100.

[0071] In this embodiment, due to space constraints near the first notch, the first connector cannot be arranged there, resulting in an uneven circumferential distribution of the first connectors. This can lead to excessive stress in the first connectors near the first notch (e.g., connecting bolt 190). Therefore, a first groove 113 recessed towards the center of the support body 110 is further provided at the first notch on the support body 110, disconnecting a portion of the support body 110 between the two first connectors located on both sides of the first notch. Furthermore, the second insulating plate 150 and the second pressure plate 160 are also disconnected at the first groove 113, resulting in a discontinuous distribution. This effectively avoids excessive internal stress in the first connectors near the first notch, improves the service life of the first connectors, and facilitates a stable connection between the first connectors and the rotor support 210 and the connecting support 100.

[0072] Specifically, there are two notches 101, distributed at both ends of a diameter of the connecting bracket 100. The second insulating plate 150 is broken circumferentially at the two first grooves 113 to form two fan-shaped annular insulating portions. The second pressure plate 160 is spaced apart circumferentially at the two first grooves 113 to form two fan-shaped annular pressure plates. The length of the first groove 113 in the circumferential direction of the bracket body 110 can be the same as the distance between the two second fan-shaped annular insulating portions and the distance between the two fan-shaped annular pressure plates. In other words, the pressure plate is aligned with the edge of the first groove 113, and the second insulating plate 150 is also aligned with the edge of the first groove 113, which facilitates the integral cutting of the first groove 113 and the separated second pressure plate and second insulating plate. The shape and size of the second insulating plate 150 and the second pressure plate 160 can be consistent.

[0073] The first insulating plate 130 may be annular, and the notch portion 101 includes a second notch formed on the first insulating plate 130. A second groove 132 recessed towards the center of the first insulating plate 130 is provided at the second notch. The second groove 132 corresponds in position to the first groove 113 and has the same shape and size. This design effectively avoids excessive internal stress in the first connector near the first notch. Furthermore, it facilitates processing.

[0074] like Figure 4 , Figure 5 and Figure 6As shown, the first pressure plate 120 can be annular, and the notch portion 101 includes a third notch formed on the first pressure plate 120. The first pressure plate 120 has a third groove 122 recessed towards the center of the first pressure plate 120 at the third notch. The third groove 122 is smaller than the width of the second groove 132 in the circumferential direction of the first pressure plate 120. The portion of the first pressure plate 120 protruding from the second groove 132 is provided with a threaded hole 123 for disassembly. This design can reduce the probability of excessive internal stress in the first connecting member near the first notch. On the other hand, when the first pressure plate 120, the first insulating plate 130, the bracket body 110, the second insulating plate 150, and the second pressure plate 160 are connected as an integral structure, when the connecting bracket 100 needs to be disassembled, the bolt can be screwed into the threaded hole 123 to push the connecting bracket 100 outward, making it easier to move away from the rotor bracket 210 of the rotor 200, thereby facilitating the overall disassembly of the connecting bracket 100.

[0075] like Figure 3 As shown, the support body 110 can be made of metal, forming a metal support body 111. It has high structural strength. One end of the outer periphery of the support body 110 can have a recessed first stop 1112. An insulating layer 112 is provided at the first stop 1112, and a first pressure plate 120 is disposed at the first stop 1112 and contacts the insulating layer 112. The design of the first stop 1112 facilitates the fixed installation of the first pressure plate 120, facilitates the accommodation of the end flange of the rotor support 210, and is beneficial for the alignment and connection of the support 100 and the rotor support 210. The design of the insulating layer 112 achieves insulation isolation between the first pressure plate 120 and the support body 110.

[0076] The insulating layer 112 can be pre-formed and then fitted onto the first stop 1112 of the bracket body 110. Alternatively, insulating material can be directly wound onto the first stop 1112, dried, and then machined to obtain the final state of the insulating layer 112. The insulating layer 112 enables the first pressure plate 120 and the bracket body 110 to achieve a stop positioning effect while maintaining insulation isolation.

[0077] The cross-section of the first pressure plate 120 can be L-shaped to facilitate matching with the first stop 1112.

[0078] The outer peripheral surface of the first pressure plate 120 can be a stepped surface, with the outer diameter of the side closer to the first insulating plate 130 being larger than the outer diameter of the side farther from the first insulating plate 130. The orthographic projections of the first insulating plate 130, insulating sleeve 140, second insulating plate 150, and second pressure plate 160 onto the first pressure plate 120 do not exceed the outer edge of the first pressure plate 120. In this way, the first pressure plate 120 can not only use a lower step to avoid the end flange of the rotor support 210, but also use a higher step to fully fit the first insulating plate 130, preventing the holes on the first insulating plate 130 through which the first connector passes from being exposed or crushed.

[0079] like Figure 7 As shown, the outer peripheral surface of the first pressure plate 120 may include a first stepped surface 124 and a second stepped surface 125. The first stepped surface 124 is lower than the second stepped surface 125, meaning that the outer diameter of the first pressure plate 120 at the first stepped surface 124 is smaller than its outer diameter at the second stepped surface 125. The first stepped surface 124 can effectively avoid the flange stop 221 of the end flange of the rotor support 210. Of course, the outer peripheral surface of the first pressure plate 120 may also include a third stepped surface, etc., having multiple steps.

[0080] Furthermore, sealant can be applied to the joints of the components on the outer surface of the connecting bracket 100. For example... Figure 10 As shown, sealant is applied at point P in the diagram, specifically at the connection gaps between the first pressure plate 120 and the first insulating plate 130, the first insulating plate 130 and the support body 110, the support body 110 and the second insulating plate 150, the second insulating plate 150 and the second pressure plate 160, and the first pressure plate 120 and the insulating layer 112. This ensures that the first insulating plate 130 and the second insulating plate 150 are not contaminated during product transportation and operation, guaranteeing that their insulation performance does not fail. Furthermore, after all components are assembled, the joints are protected by sealant, eliminating the need for on-site maintenance of the insulating plates when loading and unloading the connecting bracket 100, thus reducing on-site work difficulty.

[0081] Furthermore, in some embodiments, such as Figure 4 As shown, the connecting bracket 100 may also be provided with a second connecting hole 1113 distributed circumferentially. The second connecting hole 1113 is located on the side of the first connecting hole 1111 facing the center of the connecting bracket 100, and the output shaft 300 of the gearbox is connected through the second connecting hole 1113.

[0082] The connecting bracket 100 proposed in this utility model allows the outer diameter of the connecting bracket 100 to be larger than the minimum inner diameter of the rotor bracket 210, and sets the insulating components at the connection between the connecting bracket 100 and the rotor 200 of the generator, thus expanding the range of products that can achieve insulation isolation between the generator and the gearbox. Moreover, the connecting bracket 100 proposed in this utility model can also have a partial sealing effect, improving insulation reliability and reducing maintenance complexity.

[0083] like Figure 1 As shown, a second aspect embodiment of the present invention provides a transmission system, the transmission system comprising: a gearbox having an output shaft 300; a generator including a rotor 200 having an axial cavity, the gearbox being located on a first axial side of the generator; and a connecting bracket 100 as described in any of the above embodiments, the connecting bracket 100 being able to be inserted into the axial cavity from a second axial side of the generator to connect the output shaft 300 of the gearbox to a rotor bracket 210 of the rotor 200.

[0084] The transmission system provided in this embodiment has the beneficial effects of any of the above embodiments due to the connection bracket 100 of any of the above embodiments, which will not be described again here.

[0085] Furthermore, in some embodiments, such as Figure 1 As shown, the rotor support 210 includes a hollow shaft cylinder 211, a first connecting flange 212 connected to the first axial end of the hollow shaft cylinder 211, and a second connecting flange 213 connected to the second axial end of the hollow shaft cylinder 211. The connecting bracket 100 connects the output shaft 300 of the gearbox to the first connecting flange 212. The outer diameter of the connecting bracket 100 is larger than the inner diameter of the second connecting flange 213, and the radial width D1 of the connecting bracket 100 at the notch 101 is smaller than the inner diameter D2 of the second connecting flange 213. This allows the connecting bracket 100 to easily pass through the second connecting flange 213 and extend into the hollow shaft cylinder 211 to connect with the first connecting flange 212. Moreover, even if the inner diameter of the second connecting flange 213 is smaller than the outer diameter of the connecting bracket 100, the connecting bracket 100 can still extend into the hollow shaft cylinder 211, increasing the applicability of the connecting bracket 100 and eliminating the need to enlarge the second connecting flange 213, thus reducing the space occupied by the transmission system.

[0086] A third aspect of this utility model provides a wind turbine generator set, including a transmission system as described in any of the above embodiments.

[0087] The wind turbine generator set provided in this embodiment has the transmission system of any of the above embodiments, and thus has the beneficial effects of any of the above embodiments, which will not be described again here.

[0088] Furthermore, the wind turbine generator set also includes an impeller (not shown in the figure), which is connected to the input shaft of the gearbox. The impeller drives the output shaft 300 of the gearbox to rotate, thereby driving the generator to generate electricity.

[0089] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. It should be understood that, to those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.

Claims

1. A connecting bracket for use in a drive train comprising a generator and a gearbox, characterized in that, The connecting bracket (100) is annular and is used to be disposed in the axial inner cavity of the rotor (200) of the generator, for connecting the rotor bracket (210) of the rotor (200) and the output shaft (300) of the gearbox. The connecting bracket has a notch (101) on its outer periphery, and the notch (101) extends through the axial thickness of the connecting bracket (100).

2. The connecting bracket according to claim 1, characterized in that The rotor support (210) includes a hollow shaft cylinder (211), a first connecting flange (212) connected to the first axial end of the hollow shaft cylinder (211), and a second connecting flange (213) connected to the second axial end of the hollow shaft cylinder (211). The connecting bracket (100) is used to connect the output shaft (300) of the gearbox to the first connecting flange (212). The notch (101) allows the radial width of the connecting bracket (100) at the notch (101) to be smaller than the inner diameter of the second connecting flange (213). The notch (101) is cut-shaped with a flat cross-section, or the notch (101) is recessed into the center of the connecting bracket (100).

3. The connecting bracket of claim 1, wherein The number of notches (101) is even, and they are symmetrically distributed around the center of the connecting bracket (100).

4. The connecting bracket according to claim 1, characterized in that The connecting bracket includes: The support body (110) is annular, and a plurality of first connecting holes (1111) are circumferentially distributed near its outer edge for a first connector to pass through and connect to the rotor support. The notch (101) includes a first notch formed on the support body (110), and the plurality of first connecting holes (1111) avoid the first notch. An insulating component is provided at the first connection hole (1111) to insulate the first connector from the support body (110).

5. The connecting bracket according to claim 4, characterized in that The insulating component includes: An insulating sleeve (140) is located in the first connecting hole (1111) and is used to be fitted onto the first connector; A first insulating plate (130) is disposed on the first axial side of the bracket body (110) corresponding to the first connecting hole (1111); The second insulating plate (150) is disposed on the second axial side of the bracket body (110) corresponding to the first connecting hole (1111).

6. The connecting bracket according to claim 5, characterized in that, The connecting bracket further includes: The first pressure plate (120) is disposed on the outside of the first insulating plate (130), and the first pressure plate (120) is used to fit against the rotor support (210); The second pressure plate (160) is disposed on the outside of the second insulating plate (150), and the first connector can pass through the second pressure plate (160) and the first pressure plate (120) and squeeze the first insulating plate (130) and the second insulating plate (150).

7. The connecting bracket according to claim 6, characterized in that The first insulating plate (130), the second insulating plate (150), the first pressure plate (120), the second pressure plate (160) and the bracket body (110) are stacked and connected to form an integral structure.

8. The connecting bracket of claim 6, wherein The first notch is cut-shaped and its cross-section is flat. The support body (110) is also provided with a first groove (113) recessed toward the center of the support body (110) at the first notch. The second insulating plate (150) is spaced apart from the first groove (113) in the circumferential direction of the connecting bracket (100); The second pressure plate (160) is spaced apart from the first groove (113) in the circumferential direction of the connecting bracket (100), and the second pressure plate (160) is correspondingly pressed on the outside of the second insulating plate (150).

9. The connecting bracket of claim 8, wherein The first insulating plate (130) is annular, and the notch (101) includes a second notch formed on the first insulating plate (130). The first insulating plate (130) has a second groove (132) recessed toward the center of the first insulating plate (130) at the second notch. The second groove (132) corresponds to the first groove (113) in position and has the same shape and size. The first pressure plate (120) is annular, and the notch (101) includes a third notch formed on the first pressure plate (120). The first pressure plate (120) has a third groove (122) recessed toward the center of the first pressure plate (120) at the third notch. The third groove (122) is smaller than the width of the second groove (132) in the circumferential direction of the first pressure plate (120). The portion of the first pressure plate (120) protruding from the second groove (132) is provided with a threaded hole (123) for disassembly.

10. The connecting bracket of claim 6, wherein The support body (110) is made of metal material. One end of the outer periphery of the support body (110) has a concave first stop (1112). An insulating layer (112) is provided at the first stop (1112). The first pressure plate (120) is provided at the first stop (1112) and is in contact with the insulating layer (112).

11. The connecting bracket of claim 6, wherein The first pressure plate (120) is connected to the bracket body (110) by the first bolt (170), and the second pressure plate (160) is connected to the bracket body (110) by the second bolt (180). Both the first bolt (170) and the second bolt (180) are non-conductive bolts.

12. The connecting bracket according to claim 6, characterized in that, The outer peripheral surface of the first pressure plate (120) is a stepped surface, and the outer diameter of the side of the first insulating plate (130) is larger than the outer diameter of the side of the first insulating plate (130) away from the first insulating plate (130). The orthographic projection of the first insulating plate (130), the insulating sleeve (140), the second insulating plate (150) and the second pressure plate (160) on the first pressure plate (120) does not exceed the outer edge of the first pressure plate (120).

13. The connecting bracket of claim 1, wherein The joints of the components on the outer surface of the connecting bracket (100) are coated with sealant.

14. A drive system characterized by, The transmission system includes: A gearbox having an output shaft (300). A generator, the generator including a rotor (200) having an axial cavity, the gearbox being located on the first axial side of the generator; The connecting bracket (100) as described in any one of claims 1-13 is capable of being inserted into the axial cavity from the second axial side of the generator to connect the output shaft (300) of the gearbox to the rotor bracket (210) of the rotor (200).

15. The transmission system of claim 14, wherein, The rotor support (210) includes a hollow shaft cylinder (211), a first connecting flange (212) connected to the first axial end of the hollow shaft cylinder (211), and a second connecting flange (213) connected to the second axial end of the hollow shaft cylinder (211). The connecting support (100) connects the output shaft (300) of the gearbox to the first connecting flange (212). The outer diameter of the connecting support (100) is greater than the inner diameter of the second connecting flange (213). The radial width of the connecting support (100) at the notch (101) is smaller than the inner diameter of the second connecting flange (213).

16. A wind power unit, characterized in that Includes the transmission system as described in claim 14 or 15.

Images