CN110242504B

CN110242504B - Wind generating set

Info

Publication number: CN110242504B
Application number: CN201910577944.8A
Authority: CN
Inventors: 武青虎; 汪玲玲
Original assignee: Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Current assignee: Beijing Goldwind Science and Creation Windpower Equipment Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2022-11-11
Anticipated expiration: 2039-06-28
Also published as: CN110242504A

Abstract

The embodiment of the application provides a wind generating set, includes: the device comprises a tower barrel, a fixed shaft, an impeller, a driving wheel disc and a generator; the fixed shaft is arranged at the top of the tower barrel; the impeller is fixedly connected with the driving wheel disc; the active wheel disc is arranged on the fixed shaft in a pivoting way by taking the fixed shaft as a rotating shaft; the inner stator of the generator is sleeved on the peripheral surface of the tower; the rotor shell of the generator comprises a driven wheel disc, and the driven wheel disc is coaxial with the generator; the driving wheel disc is in transmission connection with the driven wheel disc. In the wind generating set, an impeller is connected with a driving wheel disc into a whole, and the driving wheel disc is in transmission connection with a driven wheel disc; the driving wheel disc synchronously rotates along with the impeller and simultaneously drives the driven wheel disc to rotate, so that the integral rotation of the rotor is realized. This wind generating set can compromise direct drive formula wind generating set's a great deal of advantage, can avoid the dead weight of impeller and the inhomogeneous problem of the air gap width of generator that the wind load that the impeller bore caused simultaneously, has guaranteed generator self quality and generated energy.

Description

Wind generating set

Technical Field

The application relates to the technical field of wind power generation, in particular to a wind generating set.

Background

The wind generating sets can be divided into various types according to the transmission structure, for example, the wind generating sets can be divided into a double-fed wind generating set and a direct-drive wind generating set. The direct-drive wind generating set is also called a gearless wind generator, and the generator adopts a mode that a rotor of the generator is directly connected with an impeller to drive, so that the traditional part of a gearbox is omitted. Because the gear box belongs to a part which is easy to overload and has a high premature failure rate in the megawatt wind driven generator at present, the direct-drive wind driven generator without the gear box has the advantages of high efficiency, low noise, long service life, reduced unit volume, reduced operation and maintenance cost and the like at low wind speed.

In the existing direct-drive wind generating set, because a rotor of a generator is directly connected with an impeller, the gravity of the impeller and the thrust applied to the impeller by wind load can cause relative offset between the rotor and a stator, so that the air gap width of the generator is uneven, and the generating capacity of the generator is finally influenced.

In summary, in the direct-drive wind turbine generator system in the prior art, the generator is prone to have a bad phenomenon of uneven air gap width.

Disclosure of Invention

An object of the application is to provide a fan generator set, it can enough compromise direct drive formula wind generating set's advantage, can solve the inhomogeneous defect of generator air gap width of direct drive formula wind generating set who exists among the prior art again.

The embodiment of the application provides a wind generating set, includes: the device comprises a tower barrel, a fixed shaft, an impeller, a driving wheel disc and a generator; the fixed shaft is arranged at the top of the tower barrel; the impeller is fixedly connected with the driving wheel disc; the driving wheel disc is arranged on the fixed shaft in a pivoting manner by taking the fixed shaft as a rotating shaft; the inner stator of the generator is sleeved on the peripheral surface of the tower cylinder; the rotor shell of the generator comprises a driven wheel disc, and the driven wheel disc is coaxial with the generator; the driving wheel disc is in transmission connection with the driven wheel disc.

Compared with the prior art, the method has the following advantages:

in the wind generating set provided by the application, the impeller is connected with the driving wheel disc into a whole, and the driving wheel disc is in transmission connection with the driven wheel disc; the driving wheel disc synchronously rotates along with the impeller and simultaneously drives the driven wheel disc to rotate, so that the integral rotation of the rotor is realized.

Since the driven wheel disc is a part of the rotor, the impeller only uses a driving wheel disc as an intermediary to drive the rotor to rotate. Therefore, the wind generating set does not need to be provided with a gear box, so that the wind generating set has the advantages of high efficiency and low noise when the wind speed is low, and the driving wheel disc and the driven wheel disc have higher strength compared with parts such as a common gear, a transmission shaft and the like, can bear larger load, ensure the reliability of the quality of the wind generating set, reduce the operation and maintenance cost and further prolong the service life.

In addition, in the wind generating set provided by the application, the impeller transmits mechanical force to the rotor through the driving wheel disc and the driven wheel disc, namely, the rotor is not fixedly connected with the impeller any more, and the gravity of the impeller and the thrust applied to the impeller by wind load cannot influence the position change of the rotor, so that the rotor is effectively prevented from deviating relative to the stator, and the uniformity of the air gap width of the generator is ensured; moreover, the inner stator of the generator is sleeved on the outer peripheral surface of the tower barrel, namely, the generator does not use the fixed shaft as a support any more, but uses the tower barrel as a support, so that the bending deformation of the fixed shaft does not cause the relative offset of the rotor and the stator, and the uniformity of the air gap width of the generator is further ensured.

According to the analysis, the wind generating set can give consideration to a plurality of advantages of the direct-drive wind generating set, the problem that the air gap width of the generator is not uniform due to the dead weight of the impeller and the wind load borne by the impeller can be avoided, and the self quality and the generated energy of the generator are guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.

FIG. 1 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present disclosure;

FIG. 2 is a left side view of FIG. 1 with the blade and the nacelle removed as provided by an embodiment of the present application;

FIG. 3 is a top view of FIG. 1 with the blade and nacelle removed as provided by an embodiment of the present application;

FIG. 4 is a sectional view taken along line A of FIG. 3 according to an exemplary embodiment of the present disclosure;

FIG. 5 is a partial enlarged view at B in FIG. 4 provided by an embodiment of the present application;

FIG. 6 is a schematic view of a tooth engaged with a tooth socket according to an embodiment of the present invention;

FIG. 7 is a schematic view of another tooth-to-socket engagement provided by an embodiment of the present application;

in the figure:

1, a tower drum; 111-a base; 112-yaw bearing; 2-fixed shaft;

3-an impeller; 31-a hub; 32-blades; 33-a pitch mechanism; 34-a flow guide cover;

4-a driving wheel disc; 41-sector unit; 401-a mounting portion; 4011-otic placode;

5-a generator; 51-a rotor housing; 52-a stator support;

511-a housing body; 512-driven wheel disc; 513-gullets;

6-tooth; 7-a connecting assembly; 71-a pin shaft; 72-friction plate;

8-moving shaft; 9-a connecting plate; 101-a first bearing; 102-second bearing.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The inventor of this application discovers that among the current direct drive wind generating set, the top of a tower section of thick bamboo is provided with the dead axle, and the periphery at the dead axle is established to the stator of generator (to external rotor generator) or rotor (to internal rotor generator) cover, and the periphery of dead axle still overlaps and is equipped with the moving axis, and the wheel hub of impeller passes through the moving axis and is connected with the rotor of generator. In the wind generating set with the structure, the gravity of the impeller and the thrust applied to the impeller by the wind load can cause the rotor connected with the impeller to deviate relative to the stator, so that the air gap width of the generator is not uniform; in addition, the thrust applied to the impeller by the gravity of the impeller and the wind load can cause the fixed shaft and the moving shaft to bend, so that the relative offset between the rotor and the stator is further increased. The above situation may cause the air gap width of the generator to be uneven, and finally, the power generation amount of the generator is affected.

In other types of wind turbine generators, the impeller and the generator are drivingly connected through a gearbox (e.g., two intermeshing gear shafts), which, while avoiding the disadvantage of a non-uniform air gap width for the generator, also sacrifices the benefits of direct connection of the impeller and the generator in direct drive wind turbine generators.

In view of the above, the present application provides a wind turbine generator system, as shown in fig. 1 to 4, including: a tower 1, a fixed shaft 2, an impeller 3, a driving wheel disk 4 and a generator 5. The fixed shaft 2 is arranged at the top of the tower barrel 1, and the impeller 3 is fixedly connected with the driving wheel disk 4. The active wheel disc 4 is arranged on the fixed shaft 2 in a pivoting way by taking the fixed shaft 2 as a rotating shaft. The inner stator of the generator 5 is sleeved on the outer peripheral surface of the tower barrel 1, the rotor shell 51 of the generator 5 comprises a driven wheel disc 512, the driven wheel disc 512 is coaxial with the generator 5, and the driving wheel disc 4 is in transmission connection with the driven wheel disc 512.

It should be noted that, for convenience of illustrating the structural features of the wind turbine generator system, the blades 32 and the nacelle 34 in the impeller 3 are deleted in fig. 2 to 4.

The wind generating set provided by the embodiment of the application further comprises a base 111 and a yaw bearing 112. The yaw bearing 112 is connected to the top of the tower 1 and the base 111, respectively, and one end of the fixed shaft 2 is connected to the base 111.

As shown in fig. 1 and 4, one end of the fixed shaft 2 is close to the impeller 3, and the other end of the fixed shaft 2 is connected to the base 111, so as to connect the fixed shaft 2 to the tower 1. A yaw bearing 112 is arranged between the top of the tower barrel 1 and the base 111, the yaw bearing 112 comprises a bearing outer ring and a bearing inner ring, the tower barrel 1 is connected with one of the bearing outer ring and the bearing inner ring, the base 111 is connected with the other of the bearing outer ring and the bearing inner ring, and one end of the fixed shaft 2 is connected with the base 111.

The fixed shaft 2 and the base 111 may be coupled in various ways. For example, the fixed shaft 2 may be connected to the base 111 by a connecting member (e.g., a bolt); or, the fixed shaft 2 is connected with the base 111 in a welding way; alternatively, the fixed shaft 2 and the base 111 may be integrally cast.

The inner stator of the generator 5 should be fixed relative to the tower 1. Optionally, an inner stator of the generator 5 is sleeved on the outer peripheral surface of the tower 1, and the inner stator is in interference fit with the tower 1; or the inner stator of the generator 5 is sleeved on the peripheral surface of the tower drum 1 and then connected with the tower drum 1 through the connecting piece; still alternatively, the tower 1 is provided with a support member (not shown), and the inner stator of the generator 5 is connected to the support member along the axial direction of the tower 1, so that the inner stator is fixed relative to the tower 1. The supporting member may be a boss cast integrally with the tower tube 1, and the boss may be regarded as a part of a certain tower tube section of the tower tube 1; the support may also be a component prefabricated on the tower 1, which protrudes radially from the tower 1 to the outside of the tower 1; the support may also be a component attached to the outer wall of the tower 1.

In the wind generating set provided by the application, the impeller 3 is connected with the driving wheel disc 4 into a whole, and the driving wheel disc 4 is in transmission connection with the driven wheel disc 512; the driving wheel disc 4 synchronously rotates with the impeller 3 and simultaneously drives the driven wheel disc 512 to rotate, so that the integral rotation of the rotor is realized.

Since the driven disk 512 itself is part of the rotor, the impeller 3 actually drives the rotor to rotate only through the intermediary of one driving disk 4. Therefore, the wind generating set does not need to be provided with a gear box, so that the wind generating set has the advantages of high efficiency and low noise in low wind speed, and compared with parts such as a common gear, a transmission shaft and the like, the driving wheel disc 4 and the driven wheel disc 512 have higher strength, can bear larger load, ensure the reliability of the quality of the wind generating set, reduce the operation and maintenance cost and further prolong the service life.

In addition, in the wind turbine generator system provided by the application, the impeller 3 transmits mechanical force to the rotor through the driving wheel disc 4 and the driven wheel disc 512, that is, the rotor is not fixedly connected with the impeller 3 any more, and the gravity of the impeller 3 and the thrust applied to the impeller 3 by the wind load cannot influence the position change of the rotor, so that the rotor is effectively prevented from deviating relative to the stator, and the uniformity of the air gap width of the generator 5 is ensured; moreover, the inner stator of the generator 5 is sleeved on the outer peripheral surface of the tower tube 1, that is, the generator 5 does not use the fixed shaft 2 as a support any more, but uses the tower tube 1 as a support, so that the bending deformation of the fixed shaft 2 caused by the self weight of the impeller 3 and the wind load borne by the impeller 3 does not cause the relative deviation between the rotor and the stator, and further, the uniformity of the air gap width of the generator 5 is ensured.

According to the analysis, the wind generating set can give consideration to a plurality of advantages of the direct-drive wind generating set, the problem that the air gap width of the generator 5 is uneven due to the dead weight of the impeller 3 and the wind load borne by the impeller 3 can be avoided, and the quality and the generated energy of the wind generating set are guaranteed.

Alternatively, in the wind turbine generator set provided in the embodiment of the present application, as shown in fig. 1 to 3, a plurality of teeth 6 are provided on the outer circumferential surface of the driving disk 4 at intervals in the circumferential direction, and a plurality of tooth grooves 513 are provided on the outer circumferential edge of the driven disk 512 at intervals in the circumferential direction. The driving wheel disc 4 and the driven wheel disc 512 are in meshing transmission connection through teeth 6 and tooth grooves 513.

It should be noted that although in some wind turbine generators of the prior art the direct drive of the impeller and the generator comprises two intermeshing gears, the drive of the prior art as a whole differs significantly from the drive of the present embodiment comprising the driving disk 4 and the driven disk 512.

In some wind turbine generators of the prior art, the transmission mechanism comprises two gear shafts, which are transmission shafts with gears arranged at one end. The ends of the two transmission shafts, which are not provided with gears, are respectively connected with the impeller and the generator, and the gears on the two transmission shafts are meshed with each other. The transmission mechanism at least needs two transmission shafts, and the transmission shafts have higher fracture risk in the process of transmitting power; the transmission shaft connected to the impeller 3 is required to transmit the power output from the impeller 3 and support the impeller 3, and thus the transmission shaft is easily damaged.

In the wind generating set provided by the embodiment of the application, the driven wheel disc 512 itself belongs to a part of the rotor, and the impeller 3 and the driving wheel disc 4, and the driving wheel disc 4 and the driven wheel disc 512 are directly connected, so that the power transmission between the impeller 3 and the generator 5 does not need a transmission shaft. In addition, the fixed shaft 2 is used for supporting the impeller 3 and the driving wheel disc 4, and the fixed shaft 2 does not need to rotate.

Alternatively, as shown in fig. 6, the section of the teeth 6 perpendicular to the axis of the driver disk 4 may be rectangular; as shown in fig. 7, the teeth 6 may have a trapezoidal cross section perpendicular to the axis of the driver disk 4. Of course, the section of the teeth 6 perpendicular to the axis of the driving wheel disk 4 can be in an involute shape and the like. The gullet 513 is perpendicular to the section of the driven wheel disk 512, matching the section of the tooth 6 perpendicular to the axis of the driving wheel disk 4.

Compare in the direct drive formula wind generating set among the prior art, another advantage of the wind generating set that this application embodiment provided is: the transmission ratio of the driving wheel disc 4 and the driven wheel disc 512 can be adjusted by replacing the driving wheel disc 4 with different diameter sizes. Of course, the driving pulley 4 with different diameter sizes has different number of teeth 6, ensuring that the teeth 6 of the driving pulley 4 can be normally engaged with the tooth sockets 513 of the driven pulley 512.

Those skilled in the art will understand that the positions of the teeth and the tooth grooves can be reversed, that is, in the wind turbine generator system provided in the embodiment of the present application, a plurality of tooth grooves are circumferentially provided at intervals on the peripheral edge of the driving wheel disk 4, and a plurality of teeth are circumferentially provided at intervals on the peripheral surface of the driven wheel disk 512. The driving wheel disc 4 and the driven wheel disc 512 are in meshed transmission connection with teeth through tooth sockets.

The inventor of the present application considers that if the driving disk 4 applies pressure to the driven disk 512 in the vertical direction, the rotor may be offset relative to the rotor, resulting in non-uniform air gap width of the generator 5. For the above reasons, optionally, in the wind turbine generator set provided in the embodiment of the present application, as shown in fig. 2, the tooth grooves 513 have a first depth in the axial direction of the driven wheel disc 512. The maximum depth of the teeth 6 protruding into the tooth grooves 513 in the axial direction of the driven wheel disk 512 is smaller than the first depth.

It should be noted that the axial direction of the driven wheel disk 512 is actually the vertical direction, and the first depth is the depth of the tooth slot 513 in the vertical direction. The maximum depth of the teeth 6 extending into the tooth grooves 513 along the axial direction of the driven wheel disc 512 is smaller than the first depth, which means that the teeth 6 are always away from the bottom surface of the tooth grooves 513 in the vertical direction, so that when the driving wheel disc 4 deflects downward due to the increased bending degree of the fixed shaft 2, the teeth 6 of the driving wheel disc 4 do not easily contact with the bottom surface of the tooth grooves 513 of the driven wheel disc 512, which greatly reduces the possibility that the driven wheel disc 512 bears the vertical pressure applied by the driving wheel disc 4, and reduces the risk of relative displacement of the rotor and the stator of the generator 5.

Optionally, in the wind turbine generator set provided in the embodiment of the present application, the tooth slot 513 penetrates through the driven disk 512 in the axial direction of the driven disk 512. It should be noted that the axial direction of the driven pulley 512 is actually the vertical direction, and therefore the tooth space 513 in the embodiment of the present application is a through groove that penetrates through the driven pulley 512 in the vertical direction, and at this time, even if the tooth 6 penetrates into a position deeper in the tooth space 513 in the vertical direction, the driving pulley 4 applies a vertical pressure to the driven pulley 512, so that the risk of relative displacement of the rotor and the stator of the generator 5 is reduced.

Optionally, the wind turbine generator system provided by the embodiment of the present application further includes a plurality of connection assemblies 7. The outer peripheral surface of the driving disk 4 is provided with a plurality of mounting portions 401 at intervals in the circumferential direction, and each tooth 6 is connected to the corresponding mounting portion 401 by a connecting member 7.

In this application embodiment, drive wheel dish 4 is not integrated into one piece with tooth 6, but connects through coupling assembling 7, when tooth 6 damaged, only need to change tooth 6 can, drive wheel dish 4 can continue to use, has greatly reduced the maintenance cost.

Optionally, in the wind turbine generator system provided in the embodiment of the present application, as shown in fig. 5, the connecting assembly 7 includes a pin 71 and a friction plate 72. The mounting portion 401 includes two lug plates 4011, and the two lug plates 4011 are opposed in the axial direction of the driver disk 4. One end of the tooth 6 is disposed between the two lug plates 4011, and a friction plate 72 is disposed between the tooth 6 and each lug plate 4011. The pin shaft 71 penetrates through each lug plate 4011, each friction plate 72 and the teeth 6, the pin shaft 71 is in interference fit with each lug plate 4011, and the pin shaft 71 is in clearance fit with the teeth 6.

The pin shaft 71 is in interference fit with the lug plate 4011, so that the pin shaft 71 and the lug plate 4011 are relatively fixed; the pin 71 is in clearance fit with the teeth 6, which provides for the teeth 6 to rotate about the pin 71 as an axis of rotation. In the embodiment of the present application, the teeth 6 and the ear plate 4011 apply a pre-tightening force to the friction plate 72, and a static friction force between the three ensures that the teeth 6 are fixed relative to the ear plate 4011. Those skilled in the art will appreciate that teeth 6 rotate with the driving sheave 4 and apply pressure to the side walls of the tooth slot 513 to urge the driven sheave 512 to rotate. Therefore, the load applied to the tooth 6 is a reaction force from the side wall of the tooth space 513.

The teeth 6 rotate along with the driving wheel disc 4, and when the load borne by the teeth 6 does not exceed the static friction force between the teeth 6 and the friction plate 72, the teeth 6 apply pressure to the side wall of the tooth socket 513 to push the driven wheel disc 512 to rotate; when the load borne by the teeth 6 exceeds the static friction force between the teeth 6 and the friction plate 72, the teeth 6 rotate by using the pin shaft 71 as a rotating shaft under the driving of the reaction force of the side wall of the tooth groove 513 until each tooth 6 is not in contact with the corresponding side wall of the tooth groove 513 any more, and at the moment, the driving wheel disc 4 and the driven wheel disc 512 are in a separated state, so that the rotor of the generator 5 starts to decelerate until the rotor stops. It can be seen that, in the embodiment of the present application, the connection mode between the teeth 6 and the mounting portion 401 can separate the driving wheel disk 4 and the driven wheel disk 512 when the wind turbine generator system is overloaded mechanically, so as to ensure that the driving wheel disk 4 and the driven wheel disk 512 are not damaged, and cut off the power transmission of the impeller 3 in time, thereby ensuring the safety of the generator 5.

In the embodiment of the present application, the number of the friction plates 72 is not particularly limited. In fig. 5, two friction plates 72 are provided between the tooth 6 and each lug plate 4011.

Optionally, the wind turbine generator system provided by the embodiment of the present application includes a moving shaft 8, where the moving shaft 8 is in a hollow cylinder shape. The moving shaft 8 is sleeved on the periphery of the fixed shaft 2, and a bearing is arranged between the moving shaft 8 and the fixed shaft 2. One end of the moving shaft 8 is connected with the hub 31 of the impeller 3, and the other end of the moving shaft 8 is connected with the driving wheel disk 4. Note that the movable shaft 8 is a rotating shaft, and the movable shaft 8 is rotatable with respect to the fixed shaft 2.

As shown in fig. 4, the bearing between the movable shaft 8 and the fixed shaft 2 is a second bearing 102. The number of the second bearings 102 arranged between the movable shaft 8 and the fixed shaft 2 may be one or more, and the specific number may be determined according to actual design requirements.

As shown in fig. 4, the moving shaft 8 has a cylindrical shape coaxial with the fixed shaft 2, and the inner diameter of the moving shaft 8 is larger than the outer diameter of the fixed shaft 2. The structural strength of the movable shaft 8 is ensured by the large size, and the load bearing capacity of the movable shaft 8 is improved.

As shown in fig. 1 and 2, the impeller 3 includes a hub 31, a plurality of blades 32, a pitch mechanism 33, and a nacelle 34. The hub 31 is disposed inside the nacelle 34, the pitch mechanism 33 is disposed on the hub 31, and the plurality of blades 32 are connected to the hub 31 through the nacelle 34. When the blades 32 bear wind load, the hub 31 rotates synchronously with the blades 32, and then the driving wheel disc 4 is driven to rotate by the moving shaft 8.

Optionally, in the wind turbine generator system provided in the embodiment of the present application, as shown in fig. 2, the driving wheel disk 4 is of a split structure and includes a plurality of sector units 41. A plurality of sector units 41 are sequentially arranged in a disc shape, and adjacent two sector units 41 are detachably connected.

The driving wheel disc 4 is designed into a split structure, so that the driving wheel disc is convenient to manufacture and transport, and on the other hand, when a certain local position of the driving wheel disc 4 is damaged, only the fan-shaped unit 41 to which the local position belongs needs to be replaced, so that the maintenance cost is greatly reduced.

The number of the sector units 41 may be determined according to actual needs, and the shape of each sector unit 41 may be the same, or there may be a difference, for example, one sector unit 41 is a quarter of the driving wheel disc 4, and another sector unit 41 is a sixteenth of the driving wheel disc 4. The fan-shaped units 41 in the driving wheel disc 4 shown in fig. 2 are the same in shape, so that the same set of process is conveniently used for batch manufacturing, and the production efficiency is improved.

Optionally, as shown in fig. 2, the wind turbine generator system provided in the embodiment of the present application further includes a plurality of connecting plates 9, and two adjacent sector units 41 are detachably connected through at least one connecting plate 9.

Each connecting plate 9 is lapped on the surfaces of two adjacent sector units 41 along the driving wheel disc 4, and is respectively connected with the two sector units 41 through screws. The number of the connecting plates 9 between two adjacent sector units 41 can be determined according to actual needs, and in fig. 2, two connecting plates 9 are arranged between two adjacent sector units 41, and the two connecting plates 9 are arranged at intervals along the radial direction of the driving wheel disk 4.

Optionally, in the wind turbine generator set provided in the embodiment of the present application, as shown in fig. 2, at least one tooth 6 is provided on the outer circumferential surface of the sector unit 41 at intervals along the circumferential direction of the driver disk 4.

The number of teeth 6 provided on the outer circumferential surface of the sector unit 41 is not particularly limited, but after the plurality of sector units 41 are combined into the driving wheel disk 4, the plurality of teeth 6 should be maintained to be evenly spaced along the circumferential direction of the driving wheel disk 4. In fig. 2, only one mounting portion 401 is provided on the outer peripheral surface of each sector unit 41, and one tooth 6 is provided on the mounting portion 401.

Optionally, in the wind turbine generator set provided in the embodiment of the present application, as shown in fig. 1, fig. 2, and fig. 4, the rotor housing 51 includes a housing body 511 and a driven wheel disk 512. The driven sheave 512 surrounds the outer periphery of the case body 511, and is connected to the case body 511.

The housing body 511 and the driven wheel disk 512 may be integrally formed, or may be connected by welding or other processes, or may be connected by a connecting member (e.g., a bolt). The inner peripheral surface of the housing body 511 is provided with a plurality of magnets (not shown in the drawings) that are distributed at intervals in the circumferential direction.

Optionally, in the wind turbine generator set provided in the embodiment of the present application, the rotor housing 51 is a split structure, and includes a plurality of housing units (not shown in the drawings). Each of the housing units includes a part of the housing body 511 and a part of the driven pulley disk 512, and a plurality of the housing units are sequentially arranged in the circumferential direction of the generator 5, and adjacent two housing units are detachably connected.

The number of the housing units can be determined according to actual needs, and the shapes of the housing units can be the same or different, for example, one housing unit is a quarter of the rotor housing 51, and the other housing unit is a sixteenth of the rotor housing 51. Two adjacent rotor housings 51 may be connected by using the connecting plate 9 shown in fig. 2, and for a specific connection manner, reference may be made to a connection manner of two sector units 41, which is not described herein again. The number of the splines 513 disposed on the outer shell unit is not particularly limited, but after the plurality of outer shell units form the driven wheel disc 512, the plurality of splines 513 should be uniformly distributed along the circumferential direction of the driven wheel disc 512.

Optionally, in the wind turbine generator system provided in the embodiment of the present application, as shown in fig. 4, the stator support 52 of the inner stator is sleeved on the outer side surface of the tower 1, and at least one bearing is disposed between the rotor housing 51 of the generator 5 and the stator.

In fig. 4, the bearing between the housing body 511 and the stator bracket 52 is the first bearing 101, and in fig. 4, the first bearing 101 is arranged between the housing body 511 and the stator bracket 52, and the first bearing 101 is arranged at one end of the housing body 511 close to the top of the tower 1. When two first bearings 101 may be disposed between the housing body 511 and the stator holder 52, the two first bearings 101 are spaced apart from each other in the axial direction of the housing body 511.

Optionally, in the wind turbine generator system provided in the embodiment of the present application, at least one bearing is disposed between the driving pulley disc 4 and the fixed shaft 2.

As shown in fig. 4, the bearing between the capstan plate 4 and the dead axle 2 is a second bearing 102. The number of the second bearings 102 arranged between the active wheel disc 4 and the fixed shaft 2 can be one or more, and the specific number can be determined according to the actual design requirement.

As shown in fig. 4, the wind turbine generator set provided by the embodiment of the present application includes two second bearings 102, wherein one second bearing 102 is disposed between the driving disk 4 and the fixed shaft 2, and the other second bearing 102 is disposed between the moving shaft 8 and the fixed shaft 2 and is far away from the driving disk 4.

Optionally, in the wind turbine generator system provided in the present application, the tower 1 may be provided with a wire hole (not shown in the drawings), and the wire hole is used for allowing a cable to pass through the tower 1. The cables passing through the tower 1 may include: a power cable, a power cable for supplying power to the cabin, a safety chain signal cable, and a communication cable between the cabin and the master controller. Generally, only the problem of twisting of the power cable needs to be considered.

Optionally, the wind generating set that this application was implemented to provide still includes appointed electrical equipment (not shown in the figure), and appointed electrical equipment can set up in tower section of thick bamboo 1, has seted up on tower section of thick bamboo 1 and has walked the line hole (not shown in the figure). One end of a power cable (not shown in the figure) of the generator 5 is electrically connected with the inner stator of the generator 5, and the other end of the power cable is inserted into the tower 1 through a wiring hole and is electrically connected with the specified electrical equipment. Because the inner stator and the designated electrical equipment are fixed relative to the tower barrel 1, the inner stator and the designated electrical equipment cannot rotate relatively, and the power cable can be effectively prevented from being twisted.

The designated electrical equipment may include at least one of a converter and a box transformer, and the designated electrical equipment may further include other electrical equipment, which is not described herein.

And after the power cable penetrates through the wiring hole, sealing the wiring hole. For example, the gap between the power cable and the routing hole may be filled with a sealing material.

In the embodiment of the present application, if a hole is opened in a certain area of the tower 1, which may have a large adverse effect on the strength of the tower 1, the area is set as a dangerous area. Before the tower drum 1 is provided with the wiring hole, the strength of the tower drum 1 can be checked to determine the dangerous area of the tower drum 1, and the wiring hole is arranged in the area outside the dangerous area of the tower drum 1.

The embodiment of the application has at least the following technical effects:

1. in the wind generating set provided by the application, the impeller is connected with the driving wheel disc into a whole, and the driving wheel disc is in transmission connection with the driven wheel disc; the driving wheel disc synchronously rotates along with the impeller and simultaneously drives the driven wheel disc to rotate, so that the integral rotation of the rotor is realized.

Since the driven wheel disc is a part of the rotor, the impeller only uses one driving wheel disc as an intermediary to drive the rotor to rotate. Therefore, the wind generating set does not need to be provided with a gear box, so that the wind generating set has the advantages of high efficiency and low noise when the wind speed is low, and the driving wheel disc and the driven wheel disc have higher strength compared with parts such as a common gear, a transmission shaft and the like, can bear larger load, ensure the reliability of the quality of the wind generating set, reduce the operation and maintenance cost and further prolong the service life.

By the analysis, the wind generating set that this application was implemented and is provided can compromise a great deal of advantage of direct drive formula wind generating set, can avoid the air gap width inhomogeneous problem of generator that the dead weight of impeller and the wind load that the impeller bore caused simultaneously, has guaranteed generator self quality and generated energy.

2. Compare in the direct drive formula wind generating set among the prior art, another advantage of the wind generating set that this application embodiment provided is: the transmission ratio of the driving wheel disc and the driven wheel disc can be adjusted by replacing the driving wheel discs with different diameters.

3. The connected mode of tooth and installation department in this application embodiment can break away from driving wheel dish and follow driving wheel dish when wind generating set takes place mechanical overload, guarantees that driving wheel dish and follow driving wheel dish do not receive the damage, cuts off the power transmission of impeller in time to guarantee the safety of generator.

4. In the wind generating set who provides is implemented in this application, with the design of action wheel dish for split structure, make things convenient for the preparation and the transportation of initiative wheel dish on the one hand, on the other hand, when certain local position of initiative wheel dish damages, only need to change this local position affiliated fan-shaped unit can, greatly reduced the maintenance cost.

5. In the wind generating set who provides is implemented in this application, the power cable of generator is connected with inner stator and appointed electrical equipment electricity respectively, because inner stator and appointed electrical equipment all are fixed for the tower section of thick bamboo, inner stator and appointed electrical equipment can not take place relative rotation, and this can avoid the power cable to take place to turn round the cable effectively.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

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

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims

1. The utility model provides a wind generating set, includes tower section of thick bamboo (1), dead axle (2) and impeller (3), dead axle (2) set up the top of tower section of thick bamboo (1), its characterized in that still includes: the driving wheel disc (4) and the generator (5);

the impeller (3) is fixedly connected with the driving wheel disc (4); the active wheel disc (4) takes the fixed shaft (2) as a rotating shaft and is pivotally arranged on the fixed shaft (2); the inner stator of the generator (5) is sleeved on the peripheral surface of the tower tube (1); the inner stator is in interference fit with the tower drum (1), or is connected with the tower drum (1) through a connecting piece, or the tower drum (1) is provided with a supporting piece, and the inner stator is connected with the supporting piece along the axial direction of the tower drum (1); the rotor shell (51) of the generator (5) comprises a driven wheel disc (512), and the driven wheel disc (512) is coaxial with the generator (5); the driving wheel disc (4) is in transmission connection with the driven wheel disc (512).

2. Wind park according to claim 1, wherein the outer circumferential surface of the driving wheel disc (4) is provided with a plurality of teeth (6) at circumferential intervals, and the outer circumferential edge of the driven wheel disc (512) is provided with a plurality of tooth slots (513) at circumferential intervals; the driving wheel disc (4) and the driven wheel disc (512) are in meshed transmission connection with the tooth grooves (513) through the teeth (6);

or a plurality of tooth grooves (513) are arranged at intervals along the circumferential direction on the peripheral edge of the driving wheel disc (4), and a plurality of teeth (6) are arranged at intervals along the circumferential direction on the outer peripheral surface of the driven wheel disc (512); the driving wheel disc (4) and the driven wheel disc (512) are in meshed transmission connection with the teeth (6) through the tooth grooves (513).

3. Wind park according to claim 2, characterized in that the tooth slots (513) have a first depth in the axial direction of the driven wheel disc (512); the maximum depth of the tooth (6) which is inserted into the tooth groove (513) along the axial direction of the driven wheel disc (512) is less than the first depth;

alternatively, the tooth grooves (513) penetrate through the driven wheel disc (512) along the axial direction of the driven wheel disc (512).

4. Wind park according to claim 2, further comprising a plurality of connection assemblies (7); the outer peripheral face of initiative rim plate (4) is provided with a plurality of installation departments (401) along circumference interval, every tooth (6) pass through coupling assembling (7) with correspond installation department (401) are connected.

5. Wind park according to claim 4, wherein the connection assembly (7) comprises a pin (71) and a friction plate (72); the mounting part (401) comprises two lug plates (4011), and the two lug plates (4011) are opposite to each other along the axial direction of the active wheel disc (4);

one end of the tooth (6) is arranged between the two lug plates (4011), and the friction plate (72) is arranged between the tooth (6) and each lug plate (4011); the pin shaft (71) penetrates through the lug plates (4011), the friction plates (72) and the teeth (6), the pin shaft (71) is in interference fit with the lug plates (4011), and the pin shaft (71) is in clearance fit with the teeth (6).

6. A wind power unit according to claim 1, further comprising a moving shaft (8), wherein the moving shaft (8) is hollow and cylindrical; the moving shaft (8) is sleeved on the periphery of the fixed shaft (2), and a bearing is arranged between the moving shaft (8) and the fixed shaft (2); one end of the moving shaft (8) is connected with a hub (31) of the impeller (3), and the other end of the moving shaft (8) is connected with the driving wheel disc (4).

7. Wind park according to any one of claims 2-5, wherein the active disc (4) is of a split structure comprising a plurality of sector-shaped units (41); the fan-shaped units (41) are sequentially arranged in a disc shape, and two adjacent fan-shaped units (41) are detachably connected.

8. Wind park according to claim 7, further comprising a plurality of connection plates (9); two adjacent sector units (41) are detachably connected by at least one connecting plate (9).

9. Wind park according to claim 7, wherein the outer circumferential surface of the sector unit (41) is provided with at least one tooth (6) at intervals in the circumferential direction of the active wheel disc (4).

10. Wind park according to any of claims 1-6, wherein the rotor housing (51) comprises a housing body (511) and a driven wheel disc (512); the driven wheel disc (512) surrounds the periphery of the shell body (511) and is connected with the shell body (511).

11. Wind park according to claim 10, wherein the rotor housing (51) is of a split construction comprising a plurality of housing units; each of the shell units comprises a portion of the shell body (511) and a portion of the driven sheave (512);

the plurality of shell units are sequentially arranged along the circumferential direction of the generator (5), and two adjacent shell units are detachably connected.

12. Wind park according to claim 1, comprising at least one of: the stator support of the inner stator is sleeved on the outer side surface of the tower drum (1), and at least one bearing is arranged between a rotor shell (51) of the generator (5) and the stator;

at least one bearing is arranged between the driving wheel disc (4) and the fixed shaft (2).

13. The wind generating set according to claim 1, wherein designated electrical equipment is arranged in the tower cylinder (1), and a wiring hole is formed in the tower cylinder (1); one end of a power cable of the generator (5) is electrically connected with the inner stator of the generator (5), and the other end of the power cable extends into the tower drum (1) through the wiring hole and is electrically connected with the specified electrical equipment;

the specified electrical equipment includes at least one of a converter and a box transformer.

14. Wind park according to claim 1, further comprising a bedplate (111) and a yaw bearing (112); the yaw bearing (112) is respectively connected with the top of the tower drum (1) and the base (111), and one end of the fixed shaft (2) is connected with the base (111).