Wind turbines

Abstract

The present disclosure provides a wind turbine generator set, which includes a motor and a nacelle cover axially spaced from the motor, the motor including a stator bracket, an end of the nacelle cover facing the stator bracket being provided with an axial outer flange extending axially toward the stator bracket along the stator bracket, the wind turbine generator set also includes a sealing device, the sealing device being provided between the stator bracket and the nacelle cover to cover a gap between the axial outer flange and the stator bracket, a first end of the sealing device being fixed to the stator bracket, and a second end of the sealing device extending radially outward of the axial outer flange, by fixing the first end of the sealing device to the stator bracket and axially extending the second end of the sealing device to the radial outward of the axial outer flange, the sealing device can cover the gap between the axial outer flange and the stator bracket, thereby effectively sealing the motor and the nacelle cover.

Description

Technical Field

[0001] The present invention relates to a wind generator set, and in particular to a wind generator set with a sealing device. Background Art

[0002] Wind turbines can be divided into direct drive, semi-direct drive and doubly fed units according to the transmission form. At present, direct drive permanent magnet technology is widely used, that is, the impeller directly drives the generator to operate. Wind turbines can include generators and nacelles. The sealing structure between the generator and the nacelle cover can prevent the intrusion of rain, snow, wind and sand and other external environments, and is a key part of the whole machine protection.

[0003] At present, the sealing structure used between the generator outer rotor and the nacelle cover usually draws on the yaw dynamic seal structure. The labyrinth seal can prevent rainwater from intruding, and the sealing strip can block wind and sand. However, the labyrinth seal is prone to failure. Specifically, the nacelle cover is usually made of fiberglass, which has poor overall rigidity and is prone to deformation. As a result, the roundness of the nacelle cover sealing ring and the coaxiality with the generator are difficult to control, which leads to seal failure. The tail end of the unit's main platform is a cantilever beam structure. The main platform stiffness problem may cause the nacelle cover to tilt backward as a whole, resulting in seal failure. Summary of the invention

[0004] The main purpose of the present disclosure is to provide a wind turbine generator set capable of effectively sealing the gap between a motor and a nacelle cover.

[0005] In view of the above-mentioned invention objectives, the present disclosure provides the following technical solutions:

[0006] One aspect of the present disclosure provides a wind turbine generator set, comprising a motor and a nacelle cover axially spaced from the motor, the motor comprising a stator bracket, an end of the nacelle cover facing the stator bracket being provided with an axial outer flange extending axially toward the stator bracket, the wind turbine generator set further comprising a sealing device, the sealing device being provided between the stator bracket and the nacelle cover to cover a gap between the axial outer flange and the stator bracket, a first end of the sealing device being fixed to the stator bracket, and a second end of the sealing device extending to the radially outer side of the axial outer flange.

[0007] The present invention fixes the first end of the sealing device on the stator bracket, and the second end of the sealing device axially extends to the radial outside of the axial outer flange, so that the sealing device can cover the gap between the axial outer flange and the stator bracket, thereby being able to seal the motor and the cabin cover. Since the sealing device is fixed on the stator bracket without the need to rotate, that is, the motor and the cabin cover are a static sealing structure, which can effectively prevent sealing failure.

[0008] In an exemplary embodiment of the present disclosure, the wind turbine generator set further comprises a flexible seal, the flexible seal is fixed to the sealing device, and the radial inner edge or side of the flexible seal is attached to the outer peripheral surface of the axial outer flange. In this way, the flexible seal can be tightly attached to the outer surface of the axial outer flange, which can further improve the sealing performance of the sealing device.

[0009] Specifically, the sealing device includes a main body seal, which includes a cylindrical sealing body and annular end plates arranged at both axial ends of the cylindrical sealing body, the radial inner edge of the annular end plate is connected to the end of the cylindrical sealing body, and the annular end plate includes a first end plate and a second end plate, the first end plate is fixed on the stator flange, and the second end plate is arranged close to the axial outer flange. In this way, the main body seal can be roughly formed into a U shape, increasing the number of bends of the sealing device, and when the wind travels along the surface of the sealing device, the debris mixed in the wind can be thrown out under the action of centrifugal force, so that the debris can be separated from the wind and prevented from entering the gap between the motor and the nacelle cover.

[0010] Furthermore, the sealing device further comprises a cylindrical auxiliary sealing member, and the radial outer edge of the second end plate is fixed on the inner wall of the auxiliary sealing member. Such an arrangement further increases the number of bends of the sealing device and improves the sealing performance of the sealing device.

[0011] Optionally, a conical portion is provided at one end of the axial outer flange close to the second end plate, the conical portion is axially spaced from the second end plate and its diameter gradually increases along the direction from the nacelle cover to the motor. In this way, the conical portion is formed to open toward the gap between the motor and the nacelle cover, and debris falling onto the outer surface of the axial outer flange will be blocked by the conical portion and cannot enter the gap between the motor and the nacelle cover, thereby improving the sealing performance of the sealing device.

[0012] According to another exemplary embodiment of the present disclosure, the motor further comprises a rotor, a rotor end cover of the rotor being located between the stator bracket and the nacelle cover, the rotor end cover being arranged radially outside the cylindrical sealing body, the motor further comprises an outer end cover sealing ring, a fixed end of the outer end cover sealing ring being fixed to an outer side wall of the rotor end cover and extending along the axial direction of the rotor toward the nacelle cover, and the outer end cover sealing ring being located radially outside the auxiliary seal.

[0013] In this way, by respectively arranging an outer end cover sealing ring and an inner end cover sealing ring on both sides of the rotor end cover, they respectively cover the radial outer side of the gap between the rotor end cover and the second end plate and the radial outer side of the gap between the rotor end cover and the first end plate. That is, since the rotor end cover is provided with the outer end cover sealing ring and the inner end cover sealing ring, it can cover the radial outer side of the gap between the rotor end cover and the second end plate. The outer end cover sealing ring can rotate with the rotor end cover to form a secondary sealing structure for the gap between the motor and the engine room cover. The secondary sealing structure and the sealing device are formed in a manner of matching a dynamic sealing structure and a static sealing structure, thereby further improving the sealing performance.

[0014] Furthermore, the motor further comprises an inner end cover sealing ring, which is fixed on the inner side wall of the rotor end cover and extends along the axial direction of the rotor toward the stator bracket, and the free end of the inner end cover sealing ring is radially spaced and arranged on the outer periphery of the first end plate. In this way, the inner end cover sealing ring can cover the radial outer side of the gap between the first end plate and the rotor end cover, thereby further improving the effectiveness of the coordination between the static sealing structure and the dynamic sealing structure.

[0015] Optionally, the auxiliary seal is provided with a radial outer flange at one end close to the rotor end cover, and a radial inner flange is provided at one end close to the nacelle cover, the radial inner flanges are arranged at intervals on the outer periphery of the axial outer flange, and the flexible seal is connected to the radial inner flanges. In this way, by increasing the radial outer flanges and radial inner flanges at both ends of the auxiliary seal, the number of bends of the sealing device can be increased, and the effectiveness of the sealing device is further improved.

[0016] According to another exemplary embodiment of the present disclosure, the sealing device further comprises a structural reinforcement rib, wherein the structural reinforcement rib is arranged between the first end plate and the cylindrical sealing body, thereby improving the structural strength of the sealing device.

[0017] Furthermore, the wind turbine generator set also includes a rotor brake and a brake disc, wherein the rotor brake is fixed on the stator bracket, and the brake disc is arranged on both axial sides of the inner edge of the rotor end cover and is located between a pair of calipers of the rotor brake.

[0018] Optionally, a through hole is provided on the cylindrical sealing body of the main body seal, the first end of the rotor brake is located radially inside the cylindrical sealing body and fixed to the stator flange, and the second end of the rotor brake is located radially outside the cylindrical sealing body so as to be able to contact the brake disc. In this way, the rotor brake can pass through the through hole on the cylindrical sealing body and be fixed to the stator flange, and its structure is more compact, thereby making the structure of the motor more compact.

[0019] The wind turbine generator set provided by the present disclosure has at least the following beneficial effects: the wind turbine generator set includes a sealing device axially located between the stator bracket and the nacelle cover to cover the gap between the axial outer flange and the stator bracket, the first end of the sealing device is fixed to the stator bracket, and the second end of the sealing device extends to the radial outer periphery of the axial outer flange of the nacelle cover. The sealing device is arranged in this way without the need for rotation, thereby achieving static sealing between the motor and the nacelle cover, and the structure is stable, which can effectively prevent sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or other objects and advantages of the present disclosure will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 An axial cross-sectional view of a wind turbine generator set provided by an exemplary embodiment of the present disclosure.

[0022] Figure 2 for Figure 1 A partial enlarged view of the structure within the I circle in FIG.

[0023] 100. Motor; 101. Stator bracket;

[0024] 102. rotor end cover; 103. outer end cover sealing ring;

[0025] 104. Inner end cover sealing ring; 105. Stator flange;

[0026] 200, nacelle cover; 201, axial outer flange;

[0027] 202, tapered portion; 300, sealing device;

[0028] 310. Main body seal; 311. Cylindrical seal body;

[0029] 312, annular end plate; 312-1, first end plate;

[0030] 312-2, second end plate; 313, structural reinforcement ribs;

[0031] 320, auxiliary seal; 321, radial outer flange;

[0032] 322. Radial inner flange; 400. Flexible seal. DETAILED DESCRIPTION

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the implementation of the present disclosure is limited to the embodiments set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0034] An exemplary embodiment of the present disclosure provides a wind turbine generator set, which may include a motor 100, a nacelle cover 200 axially spaced from the motor 100, and a sealing device 300 disposed between the motor 100 and the nacelle cover 200. The motor 100 may include a stator support 101, and an end of the nacelle cover 200 facing the stator support 101 may be provided with an axial outer flange 201 extending toward the stator support 101 along the axial direction of the stator support 101. The sealing device 300 may be disposed between the stator support 101 and the nacelle cover 200 to cover a gap between the axial outer flange 201 and the stator support 101. A first end of the sealing device 300 is fixed to the stator support 101, and a second end of the sealing device 300 extends to the radial outside of the axial outer flange 201.

[0035] In the present disclosure, by fixing the first end of the sealing device 300 on the stator bracket 101 and axially extending the second end of the sealing device 300 to the radial outside of the axial outer flange 201, the sealing device 300 can cover the gap between the axial outer flange 201 and the stator bracket 101, so that the motor 100 and the cabin cover 200 can be sealed. Since the sealing device 300 is fixed on the stator bracket 101 without rotation, that is, the motor 100 and the cabin cover 200 are a static sealing structure, which can effectively prevent sealing failure.

[0036] Specifically, refer to Figure 1 and Figure 2 The wind turbine generator set may include a nacelle cover 200 and a motor 100. As an example, the motor 100 may be a generator. Further, the motor 100 may include a stator and a rotor. The rotor may be sleeved on the outer periphery of the stator, that is, the motor 100 may be an outer rotor inner stator structure.

[0037] Continue to refer to Figure 2 The axial cross-section of the sealing device 300 can be roughly S-shaped. When sand and other debris are blown toward the sealing device 300 by the wind, the debris will be thrown away and separated from the wind due to the centrifugal force during the process of the wind bending along the sealing device 300, and thus cannot enter the gap between the motor 100 and the cabin cover 200.

[0038] Specifically, the sealing device 300 may include a main seal 310 and an auxiliary seal 320. The auxiliary seal 320 may be located at the axial outer end of the main seal 310, and the main seal 310 and the auxiliary seal 320 may be arranged adjacent to each other along the axial direction of the stator bracket 101 so that a bend is formed between the main seal 310 and the auxiliary seal 320, which can effectively improve the sealing performance.

[0039] As an example, the axial cross section of the main body seal 310 can be roughly formed into a U shape. Specifically, the main body seal 310 can include a cylindrical seal body 311 and an annular end plate 312 arranged at both axial ends of the cylindrical seal body 311. The cylindrical seal body 311 can extend along the axial direction of the stator bracket 101. For example, but not limited to, the cylindrical seal body 311 can be cylindrical. There can be two annular end plates 312, namely, a first end plate 312-1 and a second end plate 312-2, respectively. The first end plate 312-1 and the second end plate 312-2 can be circular ring plates, respectively. The radial inner edges of the first end plate 312-1 and the second end plate 312-2 can be connected to the axial ends of the cylindrical seal body 311, respectively. Optionally, the first end plate 312-1, the second end plate 312-2 and the cylindrical seal body 311 can be coaxially arranged so that the same distance is maintained between the sealing device 300 and the nacelle cover 200 in the circumferential direction, further improving the sealing effect of the sealing device 300.

[0040] like Figure 2 As shown, the radial inner edges of the first end plate 312-1 and the second end plate 312-2 can be connected to the two ends of the cylindrical sealing body 311 respectively, the first end plate 312-1 can be fixed on the stator bracket 101, for example but not limited to, can be fixed on the stator flange 105, and the second end plate 312-2 can be arranged close to the axial outer flange 201.

[0041] In order to improve the structural strength of the main seal 310, the sealing device 300 may also include a structural reinforcement rib 313. The structural reinforcement rib 313 may be arranged between the first end plate 312-1 and the cylindrical sealing body 311. As shown in the figure, the angle between the structural reinforcement rib 313 and the cylindrical sealing body 311 may be 30°-60°. Preferably, the angle between the structural reinforcement rib 313 and the cylindrical sealing body 311 may be 45°.

[0042] It can be understood that, in this embodiment, the length of the cylindrical sealing body 311 along its axial direction may not be greater than the length of the gap between the stator bracket 101 and the axial outer flange 201 in this direction. As an example, the second end plate 312-2 may abut against the axial outer flange 201, but is not limited to this. In this embodiment, the sealing device 300 is fixed to the stator bracket 101, so it can statically cover the gap between the motor 100 and the cabin cover 200, and will not rotate relative to the cabin cover 200. When the axial outer flange 201 abuts against the second end plate 312-2, the two will not produce relative movement and cause wear, which can improve the sealing between the motor 100 and the cabin cover 200 and improve the service life of the sealing device 300.

[0043] Continuing to refer to the drawings, the outer diameter of the second end plate 312-2 can be greater than the outer diameter of the first end plate 312-1, and the auxiliary seal 320 can be disposed on the second end plate 312-2, so that the auxiliary seal 320 can be disposed on the outer side of the axial outer flange 201. Specifically, the auxiliary seal 320 can extend axially from the side of the second end plate 312-2 toward the nacelle cover 200, so that the auxiliary seal 320 can cover the gap between the second end plate 312-2 and the axial outer flange 201, so that the sealing device 300 can fully cover the gap between the motor 100 and the nacelle cover 200, thereby preventing debris from entering the gap between the motor 100 and the nacelle cover 200, and improving the sealing between the motor 100 and the nacelle cover 200.

[0044] In this embodiment, the sealing device 300 is configured to be roughly S-shaped to preliminarily form a labyrinth sealing structure, so as to effectively seal the gap between the motor 100 and the nacelle cover 200 .

[0045] Continuing to refer to the drawings, the auxiliary seal 320 may be roughly cylindrical. In order to further improve the sealing performance of the sealing device 300 and increase the number of bends of the labyrinth seal structure, flanges may be provided at both ends of the auxiliary seal 320 in the axial direction. For example, but not limited to, the auxiliary seal 320 may be roughly Z-shaped, and a radially outer flange 321 may be provided at one end of the auxiliary seal 320 close to the stator bracket 101, and a radially inner flange 322 may be provided at one end of the auxiliary seal 320 close to the nacelle cover 200. By providing flanges at both ends of the auxiliary seal 320, the number of bends of the sealing device 300 may be increased, thereby further improving the sealing effect of the sealing device 300.

[0046] As an example, the auxiliary seal 320 can be coaxially arranged with the cylindrical seal body 311, and the second end plate 312-2 can be fixed on the auxiliary seal 320. For example, but not limited to, the radial outer edge of the second end plate 312-2 can be arranged at the axial end of the auxiliary seal 320, such as Figure 2 As shown, in this embodiment, the radial outer flange 321 of the auxiliary seal 320 can be located on the same circumferential surface as the second end plate 312 - 2 , but this is not limited to the present invention.

[0047] In addition, the second end plate 312 - 2 may also be fixed to the axial middle portion of the auxiliary seal 320 (not shown) to be connected to the inner side wall of the axial middle portion of the auxiliary seal 320 .

[0048] In order to further improve the sealing performance of the wind turbine generator set, the wind turbine generator set may further include a flexible seal 400. Specifically, the radial inner flange 322 may be axially spaced and arranged on the outer periphery of the axial outer flange 201. The flexible seal 400 is fixed to the sealing device 300, and the radial inner edge or side of the flexible seal 400 is attached to the outer peripheral surface of the axial outer flange 201. Specifically, as shown in the figure, the flexible seal 400 may be fixedly connected to the radial inner edge of the radial inner flange 322. In this embodiment, the flexible seal 400 may be made of rubber material, but is not limited thereto.

[0049] In order to further improve the sealing performance between the motor 100 and the nacelle cover 200, the rotor end cover 102 of the rotor can be arranged between the stator bracket 101 and the nacelle cover 200, and the rotor end cover 102 is arranged radially outside the cylindrical sealing body 311. The motor 100 may also include an outer end cover sealing ring 103, the fixed end of the outer end cover sealing ring 103 may be fixed to the outer side wall of the rotor end cover 102 and extend toward the nacelle cover 200 along the axial direction of the rotor, and the outer end cover sealing ring 103 may be located radially outside the auxiliary seal 320.

[0050] Furthermore, the outer end cover sealing ring 103 can be radially spaced from the auxiliary seal 320, so that during the rotation of the rotor, the auxiliary seal 320 can rotate with the rotor without touching the auxiliary seal 320, thereby preventing the outer end cover sealing ring 103 and the radial outer flange 321 from being worn, thereby improving the service life of the outer end cover sealing ring 103 and the sealing device 300. In this embodiment, since the outer end cover sealing ring 103 rotates with the rotor, a dynamic sealing structure capable of sealing the gap between the motor 100 and the nacelle cover 200 is formed.

[0051] As shown in the figure, the motor 100 may also include an inner end cover sealing ring 104, which is fixed on the inner wall of the rotor end cover 102 and extends along the axial direction of the rotor toward the stator bracket 101. The free end of the inner end cover sealing ring 104 is radially spaced at the outer periphery of the first end plate 312-1 to avoid friction between the stator bracket 101 and the inner end cover sealing ring 104, thereby improving the service life of the inner end cover sealing ring 104 and the stator bracket 101.

[0052] In this embodiment, an outer end cover sealing ring 103 and an inner end cover sealing ring 104 are respectively provided on both sides of the rotor end cover 102 to cover the radial outer side of the gap between the rotor end cover 102 and the second end plate 312-2 and the radial outer side of the gap between the rotor end cover 102 and the first end plate 312-1, respectively. That is, since the rotor end cover 102 is provided with the outer end cover sealing ring 103 and the inner end cover sealing ring 104, it can cover the radial outer side of the gap between the rotor end cover 102 and the second end plate 312-2. The outer end cover sealing ring 103 can rotate with the rotor end cover 102, and can form a secondary sealing structure for the gap between the motor 100 and the engine compartment cover 200. The secondary sealing structure and the sealing device 300 are formed in a manner that a dynamic sealing structure and a static sealing structure cooperate with each other, thereby further improving the sealing performance.

[0053] In the present disclosure, the outer end cover sealing ring 103 cooperates with the sealing device 300 , and a dynamic sealing structure and a static sealing structure cooperate with each other to effectively seal the gap between the motor 100 and the nacelle cover 200 .

[0054] In order to further improve the sealing between the motor 100 and the nacelle cover 200, a conical portion 202 may be provided at one end of the axial outer flange 201 close to the second end plate 312-2, and the conical portion 202 may gradually increase in diameter along the direction from the nacelle cover 200 to the motor 100, that is, the opening of the conical portion 202 may face the second end plate 312-2. The conical portion 202 may be provided close to the second end plate 312-2, for example but not limited to, the conical portion 202 may be spaced apart from the second end plate 312-2, and in addition, the conical portion 202 may also abut against the side wall of the second end plate 312-2 to reduce the gap between the motor 100 and the nacelle cover 200 and improve the sealing between the two. As an example, the radial inner side of the flexible seal may overlap the outer surface of the axial outer flange 201 , and the radial inner side of the flexible seal may be bent toward the tapered portion 202 to prevent external debris from entering the gap between the motor 100 and the nacelle cover 200 .

[0055] As another exemplary embodiment of the present disclosure, the wind turbine generator set may further include a rotor brake and a brake disc (not shown). The rotor brake may be fixed to the stator bracket 101, and the brake disc may be arranged on both axial sides of the inner edge of the rotor end cover 102 and located between a pair of calipers of the rotor brake. The pair of calipers can selectively approach each other so as to contact the rotor end cover 102 and generate friction with the rotor end cover 102, thereby decelerating the rotor end cover 102. The distance between the pair of calipers may be greater than the axial thickness of the inner edge of the rotor end cover 102. In the initial case, the rotor end cover 102 does not contact the caliper and can therefore rotate freely. In the case where the rotor end cover 102 needs to be braked, the pair of calipers may approach each other until at least one caliper can contact the rotor end cover 102, thereby achieving the braking of the rotor end cover 102. In this embodiment, in order to improve the service life of the rotor end cover 102, at least one of the two sides of the radial inner edge of the rotor end cover 102 may be provided with a brake pad so as to be able to rub against the caliper.

[0056] Furthermore, a through hole may be provided on the cylindrical sealing body 311 of the main seal 310, the first end of the rotor brake may be located radially inside the cylindrical sealing body 311 and fixed to the stator flange 105, and the second end of the rotor brake may be located radially outside the cylindrical sealing body 311 so as to be able to contact the brake disc. It is understandable that the caliper may be provided at the second end of the rotor brake. In this arrangement, the rotor brake may pass through the through hole on the cylindrical sealing body and be fixed to the stator flange, and the structure is more compact, thereby making the structure of the motor more compact.

[0057] In the present disclosure, by fixing the first end of the sealing device 300 on the stator bracket 101 and axially extending the second end of the sealing device 300 to the radial outside of the axial outer flange 201, the sealing device 300 can cover the gap between the axial outer flange 201 and the stator bracket 101, so that the motor 100 and the cabin cover 200 can be sealed. Since the sealing device 300 is fixed on the stator bracket 101 without rotation, that is, the motor 100 and the cabin cover 200 are a static sealing structure, which can effectively prevent sealing failure.

[0058] In this embodiment, an outer end cover sealing ring 103 and an inner end cover sealing ring 104 are respectively provided on both sides of the rotor end cover 102 to cover the radial outer side of the gap between the rotor end cover 102 and the second end plate 312-2 and the radial outer side of the gap between the rotor end cover 102 and the first end plate 312-1, respectively. That is, since the rotor end cover 102 is provided with the outer end cover sealing ring 103 and the inner end cover sealing ring 104, it can cover the radial outer side of the gap between the rotor end cover 102 and the second end plate 312-2. The outer end cover sealing ring 103 can rotate with the rotor end cover 102, and can form a secondary sealing structure for the gap between the motor 100 and the engine compartment cover 200. The secondary sealing structure and the sealing device 300 are formed in a manner that a dynamic sealing structure and a static sealing structure cooperate with each other, thereby further improving the sealing performance.

[0059] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0061] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0062] The features, structures or characteristics described in the present disclosure may be combined in one or more embodiments in any suitable manner. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

Claims

1. A wind turbine generator set, characterized in that: The wind turbine generator set comprises a motor (100) and a nacelle cover (200) arranged axially spaced from the motor (100); the motor (100) comprises a stator support (101); an end of the nacelle cover (200) facing the stator support (101) is provided with an axial outer flange (201) extending along the axial direction of the stator support (101) towards the stator support (101); The wind turbine generator set further comprises a sealing device (300), wherein the sealing device (300) is arranged between the stator support (101) and the nacelle cover (200) to cover a gap between the axial outer flange (201) and the stator support (101), wherein a first end of the sealing device (300) is fixed to the stator support (101), and a second end of the sealing device (300) extends to the radially outer side of the axial outer flange (201). The motor (100) further comprises a rotor, a rotor end cover (102) of the rotor being located between the stator support (101) and the nacelle cover (200), and the motor (100) further comprises an outer end cover sealing ring (103), a fixed end of the outer end cover sealing ring (103) being fixed to an outer side wall of the rotor end cover (102) and extending along the axial direction of the rotor toward the nacelle cover (200), and the outer end cover sealing ring (103) being located radially outside the sealing device (300).

2. The wind turbine generator set according to claim 1, characterized in that: The wind turbine generator set further comprises a flexible seal (400), the flexible seal (400) being fixed on the sealing device (300), and the radial inner edge or side surface of the flexible seal (400) being in contact with the outer peripheral surface of the axial outer flange (201).

3. The wind turbine generator set according to claim 1, characterized in that: The sealing device (300) comprises a main body seal (310), wherein the main body seal (310) comprises a cylindrical sealing body (311) and annular end plates (312) arranged at two axial ends of the cylindrical sealing body (311), wherein the radial inner edge of the annular end plate (312) is connected to the end of the cylindrical sealing body (311), and the annular end plate (312) comprises a first end plate (312-1) and a second end plate (312-2), wherein the first end plate (312-1) is fixed on the stator flange, and the second end plate (312-2) is arranged close to the axial outer flange (201).

4. The wind turbine generator set according to claim 3, characterized in that: The sealing device (300) further comprises a cylindrical auxiliary sealing member (320), and the radial outer edge of the second end plate (312-2) is fixed on the inner wall of the auxiliary sealing member (320).

5. The wind turbine generator set according to claim 3, characterized in that: A conical portion (202) is provided at one end of the axial outer flange (201) close to the second end plate (312-2), the conical portion (202) being axially spaced from the second end plate (312-2) and having a diameter that gradually increases in a direction from the nacelle cover (200) towards the motor (100).

6. The wind turbine generator set according to claim 3, characterized in that: The rotor end cover (102) is arranged radially outside the cylindrical sealing body (311), and the outer end cover sealing ring (103) is located radially outside the auxiliary sealing component (320).

7. The wind turbine generator set according to claim 3, characterized in that: The motor (100) further comprises an inner end cover sealing ring (104), the inner end cover sealing ring (104) being fixed on the inner side wall of the rotor end cover (102) and extending along the axial direction of the rotor towards the stator support (101), the free end of the inner end cover sealing ring (104) being radially spaced and arranged on the outer periphery of the first end plate (312-1).

8. The wind turbine generator set according to claim 4, characterized in that: The auxiliary seal (320) is provided with a radial outer flange (321) at one end close to the rotor end cover (102), and the auxiliary seal (320) is provided with a radial inner flange (322) at one end close to the nacelle cover (200). The radial inner flange (322) is arranged at intervals on the outer periphery of the axial outer flange (201), and the flexible seal (400) is connected to the radial inner flange (322).

9. The wind turbine generator set according to any one of claims 3 to 8, characterized in that: The sealing device (300) further comprises a structural reinforcement rib (313), wherein the structural reinforcement rib (313) is arranged between the first end plate (312-1) and the cylindrical sealing body (311).

10. The wind turbine generator set according to any one of claims 1 to 8, characterized in that: The wind turbine generator set further comprises a rotor brake and a brake disc, wherein the rotor brake is fixed on the stator bracket (101), and the brake disc is arranged on both axial sides of the inner edge of the rotor end cover (102) and is located between a pair of calipers of the rotor brake.

11. The wind turbine generator set according to claim 10, characterized in that: A through hole is provided on the cylindrical sealing body (311) of the main sealing member (310); the first end of the rotor brake is located radially inside the cylindrical sealing body (311) and is fixed to the stator flange (105); and the second end of the rotor brake is located radially outside the cylindrical sealing body (311) so as to be able to contact the brake disc.

Images