Adapter flange, motor assembly, power generation assembly, wind turbine generator, method for assembling motor assembly, and method for assembling power generation assembly

Abstract

An adapter flange (400) for providing an insulated connection between a first component and a second component. The adapter flange (400) is provided with first holes (410) and second holes (450) spaced apart from each other. The first holes (410) are through-holes, and are used for connecting the adapter flange (400) to the first component by means of first connecting members (420). The first holes (410) are provided with an insulating structure, such that the adapter flange (400) is insulated from the first connecting members (420) and the first component. The second holes (450) are used for connecting the second component to the adapter flange (400) by means of second connecting members (460). Further provided are a motor assembly, a power generation assembly, a wind turbine generator, a method for assembling a motor assembly, and a method for assembling a power generation assembly.

Description

Adapter flange, motor assembly, generator assembly and wind turbine generator set, motor assembly assembly method and generator assembly method

[0001] Cross-reference to related applications

[0002] This disclosure claims priority to Chinese patent application No. 202411978186.8 filed on December 30, 2024, and Chinese patent application No. 202423292509.6 filed on December 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of wind power generation technology, and more specifically, to a transition flange, a motor assembly, a power generation assembly, a wind turbine generator set, a method for assembling the motor assembly, and a method for assembling the power generation assembly. Background Technology

[0004] Wind turbine generators convert captured wind energy into kinetic energy through their rotors, and then convert that kinetic energy into electrical energy through their generators. Since the rotor speed is typically very low, insufficient to reach the speed required for the generator to produce electricity, a speed-increasing gearbox is usually placed between the rotor and the generator. To improve the unit's compactness, the generator and gearbox are usually assembled as an integrated structure, with the gearbox's output shaft connected to the generator's rotor assembly, and the gearbox housing connected to the generator casing.

[0005] However, various stray currents are generated in these integrated power generation components during the operation of wind turbine generators. Besides the low-frequency induced currents caused by rotor eccentricity and magnetic circuit imbalance during generator operation, there are also stray currents that originate from the converter, pass through cables, stator assembly, rotor assembly, gearbox, and ultimately return to the converter due to capacitive and conductive coupling. Because the impedance between the output shaft and bearings of the gearbox, and between the gears and the gear ring in the gearbox, is relatively low, even small stray currents can easily generate high effective currents. If the stray current is too large, it can easily cause electrolytic corrosion damage to components such as bearings and gear teeth, affecting the service life of the gearbox. Therefore, how to suppress and control the impact of stray currents in the integrated structure on the operation of the unit is a technical problem that those skilled in the art are looking to solve. Summary of the Invention

[0006] The purpose of this application is to provide a transition flange, a motor assembly, a power generation assembly, a wind turbine generator set, a motor assembly assembly method, and a power generation assembly method to effectively suppress stray currents in the power generation assembly and protect components such as bearings in the gearbox.

[0007] According to one aspect of this application, a transition flange is provided for insulatingly connecting a first component and a second component to each other. The transition flange has a first hole and a second hole spaced apart in the circumferential direction. The first hole is a through hole for connecting the transition flange to the first component via a first connector. The first hole is provided with an insulating structure to insulate the transition flange from the first connector and the first component. The second hole is used to connect the second component to the transition flange via a second connector.

[0008] According to another aspect of this application, a motor assembly is provided, the motor assembly including a generator and the aforementioned adapter flange, the adapter flange being connected to the stator housing of the generator via the first connector.

[0009] According to another aspect of this application, a power generation assembly is provided, the power generation assembly including a gearbox, a generator, and the aforementioned adapter flange, wherein the gearbox housing is connected to the first hole via a first connector, and the generator stator housing is connected to the second hole via a second connector; or, the power generation assembly includes a gearbox and the aforementioned motor assembly, the gearbox being connected to the adapter flange via the second connector and the second hole, and the output shaft of the gearbox being connected to the rotor of the generator.

[0010] According to another aspect of this application, a wind turbine generator set is provided, the wind turbine generator set including a power generation component and an impeller connected to the power generation component, the gearbox having an input shaft, and the impeller being connected to the input shaft.

[0011] According to another aspect of this application, a method for assembling a motor assembly is provided, the method comprising: preparing the aforementioned adapter flange and generator; and connecting the adapter flange to the stator housing of the generator via a first connector.

[0012] According to another aspect of this application, a method for assembling a power generation component is provided, the method comprising: preparing a gearbox and the aforementioned motor component, wherein the gearbox housing has a connection hole corresponding to a second hole on the adapter flange; and mounting the gearbox onto the motor component by means of a second connector passing through the connection hole and engaging with the second hole.

[0013] Further aspects and / or advantages of the general concept of the invention will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the general concept of the invention. Attached Figure Description

[0014] The above and other objects and features of this application will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0015] Figure 1 is a schematic diagram of the flow path of stray current in an integrated power generation module;

[0016] Figure 2 is a schematic diagram of the high-frequency current flow path after the power generation component according to an embodiment of this application is provided with the first electrical insulation component;

[0017] Figure 3 is a three-dimensional structural schematic diagram of the adapter flange according to an embodiment of this application;

[0018] Figure 4 is a cross-sectional view of the connection between the transition flange and the stator housing in the motor assembly according to an embodiment of this application;

[0019] Figure 5 is a cross-sectional view of the connection between the transition flange and the stator housing of the motor assembly according to an embodiment of this application after the insulating sealant has been potted in the sump.

[0020] Figure 6 is a partial structural schematic diagram of a power generation component according to an embodiment of this application;

[0021] Figure 7 is a cross-sectional view of the connection between the stator housing and the transition flange of the power generation assembly according to an embodiment of the present application;

[0022] Figure 8 is a cross-sectional view of the connection between the gearbox and the adapter flange of the power generation assembly according to an embodiment of the present application;

[0023] Figure 9 is a schematic diagram of the structure of a power generation component according to some embodiments of this application;

[0024] Figure 10 is a schematic diagram of the structure of a power generation component according to some other embodiments of this application. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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 application pertains upon understanding this application. 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 application, and shall not be interpreted in an idealized or overly formalistic manner.

[0033] Figure 1 shows a schematic diagram of a power generation assembly integrating a gearbox and a generator into a single unit. This integrated structure includes a gearbox 100 and a generator 200 connected to each other. The input shaft of the gearbox 100 is used for direct or indirect connection to the rotor of a wind turbine generator set, and kinetic energy is transmitted to the output shaft 130 of the gearbox 100 via a gear train 120 disposed within the housing 110 of the gearbox 100. The generator 200 includes a stator housing 210, a stator assembly 220 disposed within the stator housing 210, and a rotor assembly 230 disposed inside the stator assembly 220. The rotor assembly 230 is connected to the output shaft 130 of the gearbox 100 to receive rotational kinetic energy from the gearbox 100. The stator housing 210 of the generator 200 is fixedly connected to the rear end of the housing 110 of the gearbox 100. The output shaft 130 of the gearbox 100 is supported by bearings disposed within the housing 110 of the gearbox 100. In the integrated power generation unit, the rotor assembly 230 is typically rigidly connected to the output shaft 130 of the gearbox 100, such that the rotor assembly 230 is supported by bearings in the gearbox 100. The PWM (Pulse Width Modulation) converter 300 is connected to the stator assembly 220 of the generator 200, driving and controlling the generator 200.

[0034] The inventors of this application discovered through research that, taking a semi-direct-drive wind turbine generator as an example, there are two main stray current paths in such integrated power generation components, as shown in Figure 1, namely path A and path B.

[0035] The converter 300 supplies power to the stator side of the generator 200, switching the DC bus voltage (VDC) to the three-phase terminals of the generator 200 in switching mode, thereby generating a high-frequency component voltage. This high-frequency component voltage generates a high-frequency current between itself and the ground circuit or with a low potential. As shown in Figure 1, the high-frequency current first flows along path A from the motor windings to the stator housing 210. A portion of the high-frequency current flows along path A1 through the stator housing 210 of the generator 200 to ground and then back to the converter 300. Another portion flows along path A2 through the stator housing 210 of the generator 200 to the gearbox 100 housing 110. The current in the gearbox 100 housing 110 is further divided into two parts: one part flows along path A21 through the gearbox 100 housing 110 to ground and then back to the converter 300; the other part flows along path A22 into the gearbox 100. Because the portion of the current flowing along path A22 passes through the tooth surfaces and bearings of gearbox 100, the bearings and tooth surfaces in gearbox 100 are at risk of electro-corrosion.

[0036] Furthermore, due to the asymmetry in the motor structure or material properties, low-frequency shaft currents are generated in the generator. These shaft currents travel along path B, entering the rotating part of the gearbox 100 from the generator shaft, then passing through the bearings or gear teeth to reach the non-rotating part (housing) of the gearbox 100, and finally flowing out of the entire device through the grounding circuit. The current or voltage flowing through the bearings and gear teeth can cause breakdown currents, posing a risk of damage to the bearings and gear teeth; therefore, this value needs to be minimized as much as possible.

[0037] In order to block the high-frequency current in the generator 200 from flowing to the gearbox 100, according to one aspect of the embodiments of this application, a first insulating component 30 is provided between the gearbox 100 and the generator 200 to suppress or even block the current path A2 between the stator housing 210 of the generator 200 and the housing 110 of the gearbox 100, thereby changing the path of the high-frequency circulating current and preventing the current in the stator housing 210 from being conducted to the housing 110 of the gearbox 100 through the insulation capacitance between the inverter 300 and the stator assembly 220 and the stator housing 210 of the generator 200.

[0038] As shown in Figure 2, according to an embodiment of this application, a first insulating component 30 is provided between the housing 110 of the gearbox 100 and the stator housing 210 to isolate the high-frequency current path between the stator housing 210 of the generator 200 and the housing 110 of the gearbox 100. This ensures that the high-frequency current in the stator assembly 220 is returned to the converter 300 (current path A1) through the grounding line of the stator housing 210, preventing the high-frequency current from entering the gearbox 100 and effectively protecting the bearings and tooth surfaces.

[0039] According to an embodiment of this application, a transition flange 400 is provided, which serves as a first insulating component 30 to achieve an insulated connection between the first component and the second component. In the following embodiments, a detailed description is given using the example of the first component being the stator housing of a generator and the second component being the housing 110 of a gearbox 100. Of course, in other embodiments, the first component may be the gearbox housing and the second component may be the stator housing of a generator.

[0040] According to an embodiment of this application, an adapter flange 400 is used to connect the housing 110 of the gearbox 100 and the stator housing 210 of the generator 200 to achieve an insulated connection between the two. The first axial side of the adapter flange 400 faces the generator 200, and the second axial side faces the gearbox 100. The adapter flange 400 can be integrated into the connecting flange on the side of the stator housing 210 of the generator 200 facing the gearbox 100 or into the connecting flange at the rear end of the housing 110 of the gearbox 100. While connecting the stator housing 210 of the generator 200 to the rear end of the housing 110 of the gearbox 100, it also blocks the current conduction path between the two.

[0041] In the following embodiments, the integration of the transition flange 400 into the stator housing 210 of the generator 200 will be described in detail as an example.

[0042] Figure 3 is a three-dimensional structural schematic diagram of the adapter flange according to an embodiment of this application.

[0043] As shown in Figure 3, the transition flange 400 is generally annular and has multiple first holes 410 and multiple second holes 450. The first holes 410 are through holes used to connect the transition flange 400 to the stator housing 210 through the first connector 420. The second holes 450 are used to connect the transition flange 400 to the gearbox housing 110 through the second connector 460. The first holes 410 are provided with an insulating structure to insulate the transition flange 400 from the first connector 420 and the stator housing 210.

[0044] In the example shown in Figure 3, a plurality of first holes 410 and a plurality of second holes 450 are generally located on the same circle in the circumferential direction of the transition flange 400 and are spaced apart in the circumferential direction. In this case, the radial width of the transition flange 400 can be set to be relatively small. However, in some embodiments, a plurality of first holes 410 and a plurality of second holes 450 may also be arranged on at least two concentric circles with different radii and spaced apart in the circumference. In this case, the radial width of the transition flange 400 is relatively larger compared to the example shown in Figure 3. Further, in other embodiments, a plurality of first holes 410 and a plurality of second holes 450 may be arranged on at least two concentric circles with different radii, the number of first holes 410 and second holes 450 may be the same, and each first hole 410 and second hole 450 is aligned one-to-one with the same radius. However, the arrangement and number of the plurality of first holes 410 and a plurality of second holes 450 are not limited to the above examples, as long as the plurality of first holes 410 and a plurality of second holes 450 are staggered with each other. According to the embodiments of this application, the circle mentioned above is a virtual circle.

[0045] Although the transition flange 400 is a complete and continuous ring in the example shown in Figure 3, the embodiments of this application are not limited to this. In some embodiments, the transition flange 400 may also include multiple arc segments. Multiple arc segments may be spliced ​​together to form a complete ring, or they may be part of a ring.

[0046] The adapter flange 400 according to embodiments of this application can be integrated into the stator housing of a generator or into the gearbox housing. The specific structure of the adapter flange 400 will be described in detail below using the example of the adapter flange 400 integrated into the stator housing. As shown in FIG. 4, in the adapter flange 400 according to an embodiment of this application, an insulating structure 430 is provided at the first hole 410. This insulating structure enables the adapter flange 400 to be insulated from the first connector 420 and the stator housing 210. According to some embodiments of this application, the insulating structure 430 includes a first insulating layer 431, which is disposed on the radial inner circumferential surface of the first hole 410, thereby insulating the inner circumferential surface of the first hole 410 from the outer circumferential surface of the first connector 420. The first connector 420 can be inserted into the first hole 410 from the second side of the adapter flange 400 and can extend from the first side of the adapter flange 400 to connect with the stator housing 210, thereby mounting the adapter flange 400 onto the generator 200. Since the first connector 420 and the transition flange 400 are insulated from each other by the first insulating layer 431, an insulated connection can be achieved between the transition flange 400 and the generator 200. Because the first hole has a structure that insulates the transition flange 400 from the first component, whether the second hole has an insulating structure or not, insulation between the first and second components can be achieved through the transition flange 400.

[0047] Furthermore, the insulation structure 430 may also include a second insulation layer 432, which is disposed on the axial first side of the transition flange 400 to insulate the stator housing 210 from the first side of the transition flange 400. The second insulation layer 432 may extend continuously in a ring shape along the circumference of the transition flange 400, or it may be disposed at multiple intervals along the circumference of the transition flange 400, as long as it can insulate the stator housing 210 from the second side of the transition flange 400. The second insulation layer 432 may be fixedly disposed on the second side of the transition flange 400, or fixedly disposed on the stator housing 210, or it may be a separate component placed between the first side of the transition flange 400 and the stator housing 210 during the installation of the transition flange 400 on the generator 200.

[0048] According to one embodiment of this application, the insulating structure 430 may further include a third insulating layer 433, which is disposed on the axial second side of the transition flange 400 at a position corresponding to the first hole 410. By providing the third insulating layer 433, the insulation effect between the transition flange 400 and the first connector 420 can be further improved. The third insulating layer 433 may be fixedly disposed on the second side of the transition flange 400, or it may be a separate component placed on the second side of the transition flange 400 during the installation of the transition flange 400 on the generator 200. Similar to the second insulating layer 432, the third insulating layer 433 may extend continuously in a ring shape along the circumference of the transition flange 400, or it may be disposed at multiple intervals along the circumference of the transition flange 400 to further ensure that the first connector 420 is insulated from the second side of the transition flange 400.

[0049] According to one embodiment of this application, the first connector 420 can be a bolt, and the bolt head 422 of the first connector 420 is located on the second side of the adapter flange 400. Since a third insulating layer 433 is also provided on the second axial side of the adapter flange 400 corresponding to the first hole 410, the bolt head 422 can be insulated from the second side of the adapter flange 400, thereby ensuring that the first connector 420 is insulated from the adapter flange 400 as a whole.

[0050] The first insulating layer 431 can be an insulating material coated on the inner surface of the first hole 410, or it can be an insulating sleeve that is pasted or embedded in the first hole 410. The second insulating layer 432 and the third insulating layer 433 can be insulating materials coated on the first side and the second side of the transition flange 400, respectively, such as insulating resin. The second insulating layer 432 and the third insulating layer 433 can also be insulating gaskets pasted on the first side and the second side, for example, laminated products formed by laminating multiple insulating sheets.

[0051] As shown in Figures 4 and 5, according to one embodiment of this application, the two ends of the first insulating layer 431 protrude relative to the axial ends of the first hole 410, and the second insulating layer 432 and the third insulating layer 433 are sleeved on the outer periphery of the first insulating layer 431. For example, the second insulating layer 432 and the third insulating layer 433 are provided with through holes corresponding to the first insulating layer 431, and the inner peripheral surface of the through hole is in contact with or clearance fits the outer peripheral surface of the first insulating layer. In this case, the first insulating layer 431, the second insulating layer 432, and the third insulating layer 433 together form an insulating layer 430, which can cover the inner surface of the first hole 410 and cover at least the first side and the second side of the transition flange 400 located at the first hole 410, thereby ensuring that the first connector 420 is insulated from the transition flange 400 and that the transition flange 400 is insulated from the stator housing 210.

[0052] Before the first insulating layer 431, the second insulating layer 432 and the third insulating layer 433 are bonded to the transition flange 400, insulating material, such as insulating varnish, may be applied to the inner surface of the first hole 410, the first side and the second side of the transition flange 400 to enhance the insulation effect.

[0053] Because the end opening of the first hole 410 has a corner and the transition flange 400 is typically made of metal, tip discharge can occur at the opening of the first hole 410. If a gap exists between the first insulating layer 431 and the second insulating layer 432 or the third insulating layer 433, this gap may become a creepage path for tip discharge, and current may flow along this gap to the first connector 420, affecting the insulation performance between the transition flange 400 and the stator housing 210.

[0054] However, according to a preferred embodiment of this application, by protruding the axial ends of the first insulating layer 431 relative to the axial ends of the first hole 410, the creepage distance is increased, reducing the possibility of electrical conduction between the transition flange 400 and the stator housing 210. Typically, the voltage of a tip discharge is twice the applied voltage; a higher voltage is used during withstand voltage testing. If 1000V is applied to the transition flange 400 during a withstand voltage test, 2000V will be applied to the tip. Tip discharge can propagate radially inward from the axial ends of the first insulating layer 431 to the first connector 420, disrupting the insulation between the transition flange 400 and the first connector 420. According to an embodiment of this application, by extending the axial length of the first insulating layer 431, so that the axial ends of the first insulating layer 431 exceed the predetermined length of the opening of the first hole 410, a longer creepage distance can be obtained, eliminating the possibility of creepage and helping to ensure the insulation performance at the connection of the first connector 420.

[0055] In some embodiments, the length by which the axial end of the first insulating layer 431 protrudes relative to the axial ends of the first hole 410 may be less than or equal to the thickness of the second insulating layer 432 and the thickness of the third insulating layer 433. Of course, in other embodiments, to obtain the longest possible creepage distance, in the axial direction of the first hole, one axial end of the first insulating layer 431 may extend beyond the thickness of the second insulating layer 432; and / or another axial end of the first insulating layer 431 may extend beyond the thickness of the third insulating layer.

[0056] According to one embodiment of this application, to prevent damage to the insulation layer during the tightening of the first connector 420, the first hole 410 can be configured as a smooth hole. The portion of the screw 421 of the first connector 420 that mates with the first hole 410 is not provided with external threads; external threads are only provided on the portion where the screw 421 engages with the stator housing 210 of the generator 200 for threaded connection. To prevent damage to the first insulation layer 431 during the passage of the first connector 420 through the first hole 410, the outer diameter of the first connector 420 is slightly smaller than the inner diameter of the first hole 410.

[0057] When the adapter flange 400 is installed on the stator housing 210 of the generator 200, the first hole 410 can be aligned with the connection hole on the stator housing 210, and the first connector 420 can be inserted into the first hole 410 and engaged with the connection hole on the stator housing 210, thereby installing the adapter flange 400 on the stator housing 210 of the generator 200.

[0058] Furthermore, to prevent the first connector 420 from loosening, a washer 423 can be provided inside the bolt head 422 of the first connector 420. The washer 423 can be an anti-rotation washer, etc., and there are no specific limitations here. In addition, the washer 423 can also be made of insulating material to enhance the insulation effect of the third insulating layer 433. Furthermore, the washer 423 made of insulating material can also replace the third insulating layer 433.

[0059] According to one embodiment of this application, as shown in Figure 3, a groove 440 is formed on the axial second side of the transition flange 400 at a position corresponding to the first hole 410. The bolt head 422 of the first connector 420 can be accommodated in the groove 440 and maintain a certain gap with the inner wall of the groove 440 to prevent the bolt head 422 from being electrically connected to the side wall of the groove 440. In addition, in order to facilitate the installation or removal of the first connector 420, the groove 440 can penetrate the outer peripheral surface of the transition flange 400, so that the bolt head of the first connector 420 can be tightened by using tools such as wrenches.

[0060] As shown in Figure 4, the depth of the recess 440 can be set to be greater than the height of the bolt head 422 of the first connector 420 after tightening, so that the bolt head 422 of the first connector 420 can be completely located in the recess 440 after tightening, and can have a certain distance from the second side of the transition flange 400. This avoids the bolt head 422 from protruding from the axial second side of the transition flange 400 and affecting the distance between the transition flange 400 and the gearbox 100. On the one hand, this improves the structural compactness of the gearbox and generator after installation, and on the other hand, it can further ensure the insulation gap between the first connector 420 and the housing 110 of the gearbox 100.

[0061] According to an embodiment of this application, the recess 440 is configured as a circle or polygon conforming to the shape of the bolt head 422. The inner diameter of the recess 440 is larger than the outer diameter of the bolt head 422. When a gasket 423 is provided, the inner diameter of the recess 440 is larger than the outer diameter of the gasket 423, thereby maintaining a safe gap between the radial inner wall of the recess 440 and the bolt head 422, preventing the bolt head 422 from contacting the recess 440 and preventing electrical conduction between them. In addition, the inner surface of the recess 440 may be coated with a fourth insulating layer (e.g., insulating varnish), and a fifth insulating layer (e.g., insulating paper) may be further applied to the surface of the fourth insulating layer to reinforce the insulation effect.

[0062] To further ensure insulation between the first connector 420 and the transition flange 400, insulating sealant 442 can be filled into the recess 440 after the transition flange 400 is connected to the stator housing 210. Specifically, after the transition flange 400 is installed onto the stator housing 210 of the generator 200, a U-shaped gap with a U-shaped cross-section is formed around the outer surface of the bolt head 422. According to an embodiment of this application, sealant 442 is filled into this U-shaped gap.

[0063] As an example, a silicone resin that cures at room temperature can be used to pot the gap between the bolt head 422 and the groove 440. The insulating sealant 442 can cover the outer periphery of the bolt head 422 and fill gaps at the connection. By potting the insulating sealant 442, insulation between the first connector 420 and the transition flange 400 can be further ensured, and moisture, foreign objects, etc., can be prevented from entering the first hole 410 and from entering the interior of the generator 200 through gaps.

[0064] Furthermore, since there is a predetermined gap between the axial end face of the bolt head 422 and the surface of the axial second side of the transition flange 400, insulating sealant 442 is also applied to the axial end face of the bolt head 422 to ensure insulation between the bolt head 422 and the housing 110 of the gearbox 100.

[0065] When the generator 200 with the transition flange 400 is connected to the gearbox 100, the axial end face of the bolt head 422 is close to the housing 110 of the gearbox 100, posing a risk of discharge and leakage between the housing 110 and the first connector 420. Since there is no insulation between the first connector 420 and the stator housing 210 of the generator 200, if there is electrical conductivity between the housing 110 and the first connector 420, there will also be electrical conductivity between the housing 110 and the stator housing 210, creating a high-frequency current leakage path. However, according to the embodiments of this application, since an insulating sealant 442 is also provided on the axial end face of the bolt head 422, discharge between the first connector 420 and the housing 110 of the gearbox 100 can be effectively prevented.

[0066] As shown in Figures 4 and 5, an annular flange 470 is also formed on the axial first side of the transition flange 400. The annular flange 470 extends axially from the axial end face of the transition flange 400, extending a predetermined length relative to the end of the first hole 410 towards the generator side. In the radial direction of the transition flange 400, the annular flange 470 is located inside the first hole 410, and when engaged with the stator housing 210, the annular flange 470 is located inside the stator housing 210, thereby forming a stop ring on the radially inner side of the stator housing 210. By providing the annular flange 470, it is helpful for the alignment of the transition flange 400 when installed on the stator housing 210, and prevents the transition flange 400 from moving or misaligning relative to the stator housing 210 in the radial direction perpendicular to the transition flange 400.

[0067] To prevent electrical conduction caused by contact between the transition flange 400 and the stator housing 210, a predetermined gap is provided between the radially outer side of the annular flange 470 and the radially inner side of the stator housing 210. Furthermore, to ensure insulation between the two, an insulating material 472 is applied between the radially outer side of the annular flange 470 and the radially inner side of the housing. Typically, for ease of operation, the insulating material 472 is positioned on the annular flange 470, thereby forming an insulating stop on the generator-facing side of the transition flange 400.

[0068] As an example, insulating tape, such as non-woven tape, can be wound around the outer circumferential surface of the annular flange 470. Non-woven tape, also known as alkali-free fiberglass tape, possesses good flexibility, excellent insulation properties, and mechanical strength. It exhibits superior properties such as high strength, impact resistance, high modulus, low elongation, no hysteresis, and no eddy current loss. By winding non-woven tape, the thickness of the winding can be adjusted more flexibly, ensuring insulation isolation while avoiding interference with the alignment and installation of the transition flange 400 and stator housing 210.

[0069] According to an embodiment of this application, the second hole 450 is a threaded hole, and is spaced apart in the circumferential direction of the transition flange 400. The housing 110 of the gearbox 100 is provided with a connecting hole 111 that can be aligned with the second hole 450, as shown in Figures 6, 7 and 8. By inserting the second connector 460 into the second hole 450 and the corresponding connecting hole 111, the housing 110 can be connected to the transition flange 400, thereby realizing the connection between the gearbox 100, the transition flange 400 and the generator 200.

[0070] According to an embodiment of this application, the second hole 450 can be a through hole penetrating the transition flange 400. By selecting a second connector 460 of appropriate length, the second connector 460 is prevented from protruding from the axial first side of the transition flange 400. As shown in FIG8, as an optional example, the second hole 450 can also be a blind hole, with an opening only on the side facing the gearbox 100. By setting the second hole 450 as a blind hole, external moisture or dust can be prevented from entering the second hole 450 from the axial first side of the transition flange 400.

[0071] Although the embodiments of this application are described with the first hole 410 and the second hole 450 extending axially along the transition flange 400 as an example, it should be understood that the first hole 410 and the second hole 450 may also be arranged with one of them radially along the transition flange 400 and the other axially along the transition flange 400; or the first hole 410 and the second hole 450 may extend in other directions (e.g., with a certain inclination angle relative to the axial direction of the transition flange 400), as long as the transition flange 400 can be connected to the first component (e.g., generator 200) and the second component (e.g., gearbox 100).

[0072] According to embodiments of this application, the transition flange 400, the first connector 420, and the second connector 460 can all be made of metal to improve structural strength. Since an insulated connection is achieved between the transition flange 400 and the stator housing 210 of the generator 200, even if electrical conductivity is achieved between the gearbox housing 110 and the transition flange 400, the insulation between the gearbox housing 110 and the stator housing 210 of the generator 200 is not affected.

[0073] As the installed capacity of wind turbine generators increases, semi-direct-drive wind turbine generators are becoming increasingly mainstream. For semi-direct-drive wind turbine generators, the gearbox 100 and generator 200 are typically assembled as an integrated structure. In current production practice, the gearbox 100 is usually manufactured by a gearbox factory, the generator by a motor factory, and then they are assembled at a final assembly plant. Gearbox factories and final assembly plants typically lack insulation processing capabilities, while motor factories do possess insulation processing capabilities.

[0074] According to an embodiment of the present invention, the transition flange 400 is manufactured separately and then connected to the stator housing 210 of the generator 200 via a first connector 420 at the motor factory, thereby forming a motor assembly with the transition flange 400 having an insulating structure capable of achieving an insulated connection with the gearbox 100. When assembling the motor assembly and gearbox at the final assembly plant, only conventional connections are required; no additional insulation treatment is needed to obtain an integrated power generation assembly with an insulated connection between the gearbox 100 housing 110 and the stator housing 210 of the generator 200.

[0075] After the insulation connection between the gearbox 100 and the generator 200 wears down, causing a deterioration in insulation performance, it can be easily maintained by disassembling the first connector 420 and the second connector 460 and replacing the new transition flange 400. Disassembly and assembly are convenient, and maintenance is simple. Since only the transition flange 400 needs to be replaced, and more expensive components do not need to be replaced, maintenance costs are low.

[0076] Therefore, according to an embodiment of this application, a motor assembly is provided, the motor assembly including a generator 200 and the aforementioned adapter flange 400. The adapter flange 400 is integrated into the stator housing 210 of the generator 200, so that the integrated motor assembly has an insulated connection structure. When assembled with the gearbox 100, it can be connected using a second connector 460, which is simple and convenient to operate.

[0077] Furthermore, according to an embodiment of this application, a power generation assembly is also provided, the power generation assembly including a gearbox 100 and the aforementioned motor assembly, the gearbox 100 being connected to the adapter flange 400 via a second connector 460, thereby obtaining an integrated power generation assembly that integrates the gearbox 100 and the generator 200.

[0078] Although the preceding embodiments use the adapter flange 400 to connect the gearbox 100 and the stator housing 210 of the generator 200 as an example, the application of the adapter flange 400 in this application is not limited to this, and it can also be used to realize any two components that need to achieve an insulated connection.

[0079] According to some embodiments of this application, a first insulating component 30 can be provided on the current conduction path between the housing 110 of the gearbox 100 and the stator housing 210 of the generator 200, thereby providing the first current suppression path. Furthermore, a second insulating component can be provided between the stator assembly 220 and the stator housing 210, blocking the current conduction between the stator housing 210 and the stator assembly 220, thus providing the first current suppression path. The first insulating component 30 and the second insulating component can be used selectively or simultaneously to achieve better suppression of high-frequency currents.

[0080] As described above with reference to FIG1, there are two main stray current paths in this integrated power generation assembly, namely path A and path B as shown in FIG1. ​​The embodiments of this application connect the generator 200 and the gearbox 100 using a transition flange 400. Since the transition flange 400 is provided with an insulating structure, a first current suppression path is provided in the power generation assembly. This first current suppression path can suppress current conduction between the stator assembly 220 of the generator 200 and the housing 110 of the gearbox 100, thereby suppressing the high-frequency current flowing along path A. This prevents current from flowing through the insulation capacitance between the stator assembly 220 and the stator housing 210 to the housing 110 of the gearbox 100, effectively protecting the gear teeth and bearings 140 in the gearbox 100.

[0081] In the process of researching the integrated structure of the gearbox and generator, the inventors of this application employed different isolation and bypass conduction methods for the power generation components, and tested the phase and amplitude of voltage and current for each path after different isolation methods and conduction. By analyzing the amplitude, based on Kirchhoff's voltage law and current law, they analyzed the potential relationship and current propagation path, discovering that a large potential difference fluctuates within the gearbox 100. Sometimes the absolute value of the amplitude is A+B, and sometimes it is the absolute value of AB, with a fluctuation range larger than that of individual paths A and B. Under these circumstances, the risk of electro-corrosion of the bearings and gear teeth in the gearbox 100 increases exponentially. Therefore, the inventors of this application believe that it is ideal to simultaneously suppress stray currents in different paths.

[0082] In order to block both the high-frequency current path A flowing from the stator assembly 220 to the gearbox 100 and the shaft current path B flowing from the rotor assembly 230 into the gearbox 100 via the output shaft 130, according to another aspect of the embodiments of this application, in addition to providing a first current suppression path, a second current suppression path is also provided in the power generation assembly. The second current suppression path is used to suppress the current flowing from the rotor assembly 230 of the generator 200 to the output shaft 130. Figure 9 shows a schematic structural diagram of a power generation assembly according to an embodiment of this application, which simultaneously provides a first current suppression path and a second current suppression path.

[0083] As an example, the second current suppression path includes a first bypass conduction path disposed between the rotor assembly 230 of the generator 200 and the housing 110 of the gearbox 100, and / or a second bypass conduction path disposed between the rotor assembly 230 and the stator housing 210. The first bypass conduction path enables current conduction between the rotor assembly 230 and the housing 110, thereby allowing the low-frequency induced current in the generator 200 to be conducted to the housing 110 of the gearbox 100 and grounded through a grounding circuit on the housing 110. The second bypass conduction path enables current conduction between the rotor assembly 230 and the stator housing 210, thereby allowing the low-frequency induced current in the generator 200 to be conducted to the stator housing 210 and grounded through a grounding circuit on the stator housing 210.

[0084] As shown in Figure 9, the first bypass conduction path can be formed by a dynamic conductive device disposed between the rotor of the generator and the housing 110 of the gearbox 100. The dynamic conductive device can bypass the induced current path, so that the potential between the rotating body in the generator 200 and the housing 110 of the gearbox 100 is equal, thereby allowing the induced current to be directly conducted from the rotor assembly 230 to the housing 110 of the gearbox 100 (i.e., flowing along path B1 shown in Figure 9), avoiding the current flowing through the gear train 120 inside the gearbox 100.

[0085] As an example, the dynamic conductivity device includes a first brush 40, which enables a current conduction path to be formed between the rotor assembly 230 and the housing 110 of the gearbox 100. The induced current generated in the generator 200 is conducted through this path to the housing 110 of the gearbox 100, and then returns to the converter 300 through the grounding path of the housing 110, forming a closed loop. Because the low-frequency induced current generated in the generator 200 is directly transmitted to the housing 110 of the gearbox 100 through a current bypass path, without flowing through the bearings and gear teeth in the gearbox 100, damage to the bearings and gear teeth can be avoided.

[0086] As shown in Figure 9, according to one embodiment of this application, the first brush 40 can be mounted on the rotor assembly 230 of the generator 200. The rotor assembly 230 includes a rotor bracket and a rotor mounted on the rotor bracket, and the rotor bracket is mounted on the output shaft 130 of the gearbox 100. The bracket of the first brush 40 can be mounted on the rotor bracket, and the bristles of the first brush 40 contact the housing 110 of the gearbox 100. Mounting the first brush 40 on the generator facilitates the installation, maintenance, or replacement of the first brush 40. As an example, the first brush 40 can be first mounted on an adapter plate, and then the adapter plate can be mounted on the rotor bracket of the generator. During installation or replacement, the operator can directly access the adapter plate through the inner cavity of the generator 200 to install or remove the adapter plate as a whole, which is more convenient for maintenance and replacement compared to mounting the brush on the housing 110 of the gearbox 100.

[0087] As an example, the first brush 40 can be a carbon fiber brush. By selecting fibers with appropriate stiffness, the fibers can be pierced, enabling it to function normally as a conductive bypass even under oil mist conditions.

[0088] According to one embodiment of this application, the first bypass conduction path may further include an annular friction disc, which is conductive and installed on the side of the housing 110 of the gearbox 100 facing the generator 200, opposite the first brush 40, with the bristles of the first brush 40 in contact with the friction disc. During the operation of the power generation assembly, the first brush 40 is always in contact with and conducts through the friction disc. The low-frequency induced current generated in the generator 200 can flow through the rotor support, the first brush 40, the friction disc, and the housing 110, and then flow into the grounding circuit. Thus, the current bypasses the rotating body in the gearbox 100, preventing the current from flowing through components such as bearings and tooth surfaces.

[0089] According to another embodiment of this application, the power generation assembly further includes a sealing ring 150. As shown in FIG9, the sealing ring 150 is disposed between the housing 110 and the output shaft 130, more specifically, it is disposed parallel to the bearing 140 between the shaft support 1101 and the output shaft 130, and is located on the side of the bearing 140 facing the rotor assembly 230. Lubricating grease is disposed in the bearing receiving cavity formed between the shaft support 1101 and the output shaft 130 to lubricate the output shaft 130 and the bearing 140, and the sealing ring 150 can seal the lubricating grease. The sealing ring 150 can be mounted on the shaft support 1101 to maintain a dynamic seal with the output shaft 130.

[0090] As shown in Figure 9, the first bypass conduction path can be formed by a sealing ring. The sealing ring 150 contains a conductive material, thereby forming a current conduction path between the output shaft 130 and the shaft support 1101. The current flowing from the rotor assembly 230 to the output shaft 130 can be conducted through the sealing ring 150 to the housing 110, and then return to the converter 300 through the grounding path of the housing 110, forming a closed loop. Since the low-frequency induced current generated in the generator 200 is directly transmitted to the housing 110 of the gearbox 100 through the bypass path formed by the conductive sealing ring 150, without flowing through the bearings and gear teeth in the gearbox 100, damage to the bearings and gear teeth can be avoided. To form the bypass conduction path through the sealing ring 150, the dynamic impedance of the sealing ring 150 must be less than the dynamic impedance of the bearing 140. By using the sealing ring 150 to form the current conduction path, it not only seals the grease but also protects the bearing 140, and is easy to install without occupying additional space.

[0091] As shown in Figure 10, according to an embodiment of this application, the first current suppression path may further include a second bypass conduction path formed by a second brush 60 disposed between the rotor assembly 230 and the stator housing 210. The second brush 60 enables the establishment of a circuit conduction path between the rotor assembly 230 and the stator housing 210, allowing the low-frequency induced current generated in the rotor assembly 230 to flow into the converter through grounding of the stator housing 210, thus preventing the current from entering the gearbox 100.

[0092] Typically, for maintenance of the gearbox 100, a hollow shaft extending axially along the generator is provided on the rotor support, allowing personnel to pass through the shaft to access one side of the gearbox 100. As an example, a second brush mounting bracket can be mounted on the stator housing 210, and the second brush 60 can be mounted on the bracket, with its bristles making frictional contact with the inner wall of the shaft. Alternatively, the second brush 60 can be positioned at the opposite end of the generator 200 from the gearbox 100 for easier installation and maintenance.

[0093] According to some embodiments of this application, at least one of the first brush 40, the second brush 60, or the sealing ring 150 described above can be used to form a second current suppression path. Alternatively, at least two of the first brush 40, the second brush 60, or the sealing ring 150 can be used simultaneously to form a second current suppression path. By forming a bypass conduction path through the second current suppression path, the low-frequency induced current generated in the rotor assembly 230 can flow into the converter through the stator housing 210 grounding, preventing the current from entering the gearbox 100, thereby achieving the effect of suppressing low-frequency induced current.

[0094] According to some embodiments of this application, as shown in FIG10, the second current suppression path can be jointly constructed by the third electrical insulation component 50 and the second bypass conduction path.

[0095] A third electrical insulation component 50 is disposed between the output shaft 130 and the rotor assembly 230, thereby electrically insulating the output shaft 130 and the rotor assembly 230. As an example, the rotor support 231 includes a first rotor support segment and a second rotor support segment connected to each other. The first rotor support segment is connected to the output shaft 130, and the second rotor support segment is disposed on the outer periphery of the first rotor support segment and supports the rotor 232. The third electrical insulation component 50 is disposed at the connection between the first rotor support segment and the second rotor support segment, thereby electrically insulating the first rotor support segment and the second rotor support segment.

[0096] By providing a third electrical insulation component 50, a high impedance is achieved between the main body of the rotor assembly 230 and the output shaft 130 of the gearbox 100, effectively blocking conductive current and making it difficult for the low-frequency induced current generated in the rotor to be conducted to the output shaft. The second bypass conduction path can be formed by the second brush 60. This second bypass path allows current to flow between the rotor assembly 230 and the stator housing 210. The low-frequency induced current generated in the rotor assembly 230 can then flow with the current in the stator housing 210 through the second bypass conduction path, thereby connecting to the grounding circuit.

[0097] According to embodiments of this application, in addition to setting a first current suppression path, a second current suppression path can also be set simultaneously to effectively isolate stray currents and rotating parts in the gearbox. For example, when a first current suppression path (e.g., a first insulating component and / or a second electrical insulating component) is set in a power generation component, a third electrical insulating component, a first bypass conduction path, and a second bypass conduction path can also be set to simultaneously suppress low-frequency induced currents and high-frequency induced currents. The second current suppression path can be used in combination with the first current suppression path in one or more of various forms. For example, the first insulating component (and / or the second insulating component) and the first bypass conduction path can be combined with each other; the first insulating component (and / or the second insulating component), the third insulating component, and the second bypass conduction path can be combined with each other; the first insulating component (and / or the second insulating component), the first bypass conduction path, the third insulating component, and the second bypass conduction path can be combined with each other. The current suppression path setting method of this application is not limited to the above examples, and those skilled in the art can make other combinations or modifications based on the embodiments of this application.

[0098] According to the embodiments of this application, a better current suppression effect can be obtained by simultaneously setting a first current suppression path and a second current suppression path. On the one hand, the high potential of the stator housing 210 and the stator assembly 220 can be isolated from the low potential of the gearbox 100 by the transition flange 400. Furthermore, since the stator housing 210 is connected to the grounding circuit, high-frequency current can be introduced into the grounding circuit. Thus, even if the potential of the stator assembly 220 is high, high-frequency current can be prevented from being introduced into the gearbox 100, thereby preventing the current from being introduced into the gear train 120 from the gearbox housing 110. On the other hand, by setting a first bypass conduction path and / or a second bypass conduction path as a second current suppression path, the rotor assembly 230 of the generator 200, the rotating body in the gearbox 100, and the housing 110 of the gearbox 100 are all at substantially the same low potential. Furthermore, the low-frequency induced current generated in the rotor assembly 230 can be conducted to the housing 110 or the stator housing 210, and a closed loop is formed through the grounding of the housing 110 and the stator housing 210 and the grounding of the converter 300, preventing current from flowing through the bearing 140. Therefore, the protection circuit system of the generator device of this application, formed by setting the first current suppression path and the second current suppression path, can more effectively protect the bearing at the output end of the gearbox and the tooth surface on the output side of the gear train, thereby improving the overall reliability of the generator device.

[0099] According to embodiments of the present application, the gearbox housing and / or the generator stator housing of the power generation assembly can be configured to be connected to a grounding circuit. For example, a grounding connection point is provided on the gearbox housing and / or the generator stator housing to facilitate connection to a grounding wire. However, according to embodiments of the present application, a grounding point may not be pre-set on the gearbox housing and / or the generator stator housing. Instead, the grounding connection point is machined on the gearbox housing and / or the generator stator housing during the installation of the power generation assembly, before connection to the grounding wire.

[0100] According to an embodiment of this application, a wind turbine generator set is also provided, the wind turbine generator set including the aforementioned power generation component and an impeller connected to the power generation component, the gearbox 100 having an input shaft, and the impeller being connected to the input shaft.

[0101] According to an embodiment of this application, a method for assembling a motor assembly is also provided, the method comprising the following steps:

[0102] Prepare the aforementioned adapter flange 400 and generator 200;

[0103] Align the first hole 410 on the adapter flange 400 with the connection hole on the stator housing 210 of the generator 200;

[0104] The first connector 420 passes through the first hole 410 and engages with the connecting hole on the stator housing 210, thereby installing the adapter flange 400 onto the generator 200.

[0105] The aforementioned fourth and fifth insulating layers can be laid during the fabrication of the transition flange 400 or during the assembly of the motor assembly. Specifically, before installing the first connector 420, the fourth insulating layer (e.g., insulating varnish) can be applied to the inner surface of the recess 440, followed by the application of the fifth insulating layer (e.g., insulating paper), which is then adhered to the fourth insulating layer.

[0106] After installing the first connector 420, insulating sealant 442 can be poured into the recess 440 to seal various gaps in the recess 440 and ensure insulation performance. In addition, sealant can be applied to the joint between the transition flange 400 and the stator housing 210.

[0107] The motor assembly obtained by the above-described motor assembly method has a transition flange 400 that is insulated from the stator housing 210. It can be assembled with the gearbox using conventional connection methods, and can also ensure that the gearbox 100 housing is insulated from the stator housing 210, thereby suppressing the high-frequency current generated in the generator from entering the gearbox 100.

[0108] According to another embodiment of this application, a method for assembling a power generation module is also provided, the method comprising the following steps:

[0109] Prepare the gearbox 100 and the previously described motor assembly;

[0110] Align the mounting holes on the housing 110 of the gearbox 100 with the second hole 450 on the transition flange 400.

[0111] By using the second connector 460 to pass through the mounting hole on the housing 110 from one side of the gearbox 100 and engage with the second hole 450, the gearbox 100 is combined with the motor assembly to obtain the power generation assembly according to the embodiment of this application.

[0112] According to embodiments of this application, insulating material can be added to the gap between the housing 110 of the gearbox 100 and the first connecting member 420 to further improve the insulation performance between the two and prevent gap discharge. Furthermore, sealant can be applied to the joint between the adapter flange 400 and the housing 110 of the gearbox 100 to further improve the insulation, sealing performance, and service life of the integrated power generation component.

[0113] Although specific details of the embodiments of this application have been described in detail with reference to the accompanying drawings, the scope of protection of this application is not limited by the description. Without departing from the principles of this application, those skilled in the art can make corresponding modifications and variations, which will fall within the scope of protection of this application.

Claims

1. A transition flange (400) for insulatingly connecting a first component and a second component, the transition flange (400) having a first hole (410) and a second hole (450) spaced apart, the first hole (410) being a through hole for connecting the transition flange (400) to the first component via a first connector (420). in, The first hole (410) is provided with an insulating structure, so that the transition flange (400) is insulated from the first connector (420) and the first component, and the second hole (450) is used to connect the second component to the transition flange (400) through the second connector (460).

2. The adapter flange according to claim 1, wherein, The first component is one of the stator housing (210) of the generator (200) and the housing (110) of the gearbox (100), and the second component is the other of the stator housing (210) of the generator (200) and the housing (110) of the gearbox (100).

3. The adapter flange according to claim 1, wherein, The insulating structure includes a first insulating layer (431) disposed on the radial inner surface of the first hole (410).

4. The adapter flange according to claim 3, wherein, The first axial side and the second axial side of the adapter flange (400) face the first component and the second component respectively. The insulating structure further includes a second insulating layer (432) and / or a third insulating layer (433). The second insulating layer (432) is disposed on the first side of the adapter flange (400) to insulate the first side from the first component. The third insulating layer (433) is disposed on the second side of the adapter flange (400) to insulate the second side from the first connector (420).

5. The adapter flange according to claim 4, wherein, The insulating structure is formed at the first hole (410).

6. The adapter flange according to claim 4, wherein, The first insulating layer (431) has two axial ends protruding relative to the first hole (410), and the second insulating layer (432) and the third insulating layer (433) are respectively sleeved on the outer periphery of the first insulating layer (431).

7. The adapter flange according to claim 4, wherein, The second insulating layer (432) and / or the third insulating layer (433) extend continuously in a ring or are spaced apart along the circumference of the transition flange (400).

8. The adapter flange according to claim 1, wherein, The first hole (410) and the second hole (450) extend along the axial direction of the adapter flange (400). The first hole (410) is a smooth hole, and the second hole (450) is a threaded hole. The second hole (450) is either a through hole or a blind hole that opens to the side facing the second component.

9. The adapter flange according to claim 1, wherein, The first hole (410) and the second hole (450) are arranged on the same circle with respect to the center of the transition flange (400) and are spaced apart along the circumferential direction, or they are arranged on different circles with respect to the center of the transition flange (400).

10. The adapter flange according to claim 1, wherein, The transition flange is an integrally formed annular body, or it may include multiple arc segments.

11. The transition flange according to any one of claims 1 to 10, wherein, The first axial side of the transition flange (400) is formed with an annular flange (470), which is used for positioning and engagement when the transition flange (400) is connected to one of the first component and the second component. An insulating material is applied to the radial outer side of the annular flange (470).

12. The adapter flange according to any one of claims 4-7, wherein, A groove (440) is formed on the second side of the adapter flange (400) at a position corresponding to the first hole (410). The first connector (420) is a bolt. The groove (440) is used to accommodate the bolt head (421) of the first connector (420). The third insulating layer is disposed in the groove (440).

13. An electric motor assembly comprising a generator (200) and an adapter flange (400) as claimed in any one of claims 1-12, the adapter flange (400) being connected to the stator housing (210) of the generator (200) via the first connector (420).

14. The motor assembly according to claim 13, wherein, The first axial side of the adapter flange (400) faces the generator (200), and a groove (440) is formed on the second axial side of the adapter flange (400) at a position corresponding to the first hole (410). One end of the first connector (420) is located in the groove (440), and the groove (440) is filled with insulating sealant (442).

15. The motor assembly according to claim 14, wherein, The first connector (420) is a bolt, and the bolt head (421) of the first connector (420) is located in the sink (440). The insulating sealant (442) fills the gap between the bolt head (421) and the inner wall of the sink (440).

16. The motor assembly according to claim 15, wherein, There is a predetermined gap between the axial end face of the bolt head (421) and the surface of the second axial side of the transition flange (400), and the insulating sealant (442) is also provided on the axial end face of the bolt head (421).

17. A power generation assembly comprising a gearbox (100), a generator (200), and a transition flange (400) as claimed in any one of claims 1 to 12, wherein the housing (110) of the gearbox (100) is connected to a first hole (410) via a first connector (420), and the stator housing (210) of the generator (200) is connected to a second hole (450) via a second connector (460), or, The power generation assembly includes a gearbox (100) and a motor assembly as described in any one of claims 13-16, wherein the housing (110) of the gearbox (100) is connected to the adapter flange (400) by a second connector (460) and a second hole (450), and the output shaft of the gearbox (100) is connected to the rotor of the generator (200).

18. The power generation component according to claim 17, wherein, The power generation component further includes a first bypass conduction path and / or a second bypass conduction path, wherein the first bypass conduction path enables current to flow between the rotor assembly (230) of the generator (200) and the housing (110), and the second bypass conduction path enables current to flow between the rotor assembly (230) and the stator housing (210).

19. The power generation component according to claim 18, wherein, The first bypass conduction path is formed by at least one of the first brush (40) and the sealing ring (150). The first brush (40) is disposed between the rotor assembly (230) and the housing (110) to enable current conduction between the rotor assembly (230) and the housing (110); The power generation assembly also includes a bearing (140) disposed between the output shaft (130) and the housing (110), and a sealing ring (150) disposed in the axial direction between the bearing (140) and the rotor assembly (230). The sealing ring (150) comprises a conductive material to conduct current between the output shaft (130) and the housing (110).

20. The power generation component according to claim 19, wherein, The first brush includes a first brush bracket and bristles mounted on the brush bracket. The first brush bracket is mounted on the rotor assembly (230), and the bristles are in contact with the housing (110).

21. The power generation component according to claim 20, wherein, The power generation component also includes an annular friction disk, which has a conductive function, is installed on the housing (110), faces the first brush (40), and is in contact with the bristles of the first brush (40).

22. The power generation component according to claim 19, wherein, The second bypass conduction path includes a second brush (60), which is disposed between the rotor assembly (230) and the stator housing (210) to enable electrical conduction between the rotor assembly (230) and the stator housing (210).

23. A wind turbine generator set, the wind turbine generator set comprising a power generation component as claimed in any one of claims 17-22 and an impeller connected to the power generation component, the gearbox (100) having an input shaft, the impeller being connected to the input shaft.

24. A method for assembling a motor assembly, the method comprising: Prepare a generator (200) and a transition flange (400) as described in any one of claims 1-12; The adapter flange (400) is connected to the stator housing (210) of the generator (200) via the first connector (420).

25. The motor assembly method according to claim 24, wherein, The first axial side of the adapter flange (400) faces the generator (200), and a groove (440) is formed on the second axial side of the adapter flange (400) at a position corresponding to the first hole (410). The first connector (420) is a bolt, and the bolt head (421) of the first connector (420) is located in the groove (440). The motor assembly method further includes: After the adapter flange (400) is connected to the stator housing (210), insulating sealant (442) is filled into the groove (440) and the insulating sealant (442) is used to encapsulate the bolt head (421).

26. A method for assembling a power generation module, the method comprising: Prepare a gearbox (100) and a motor assembly as described in any one of claims 13-16, wherein the gearbox (100) has a housing (110) having a connection hole corresponding to the second hole (450) on the transition flange (400); The gearbox (100) is mounted on the motor assembly by means of a second connector (460) passing through the connection hole and engaging with the second hole (450).

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