CN110829644A - Support device, stator module and wind driven generator - Google Patents
Support device, stator module and wind driven generator Download PDFInfo
- Publication number
- CN110829644A CN110829644A CN201911087592.4A CN201911087592A CN110829644A CN 110829644 A CN110829644 A CN 110829644A CN 201911087592 A CN201911087592 A CN 201911087592A CN 110829644 A CN110829644 A CN 110829644A
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- Prior art keywords
- flange
- support
- stator
- support device
- shaft
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1823—Rotary generators structurally associated with turbines or similar engines
- H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a supporting device, a stator assembly and a wind driven generator. The supporting device comprises: the radial outer ends of the first support piece and the second support piece are used for fixing the stator; the shaft connecting part is connected with the radial inner ends of the first supporting piece and the second supporting piece and is used for connecting a fixed shaft of the wind driven generator; wherein, the first supporting piece and the second supporting piece form an integrated frame structure through a shaft connection part. According to the invention, the hollow first supporting piece and the hollow second supporting piece are oppositely arranged to form the radial inner end and the radial outer end of the supporting device, and the shaft connecting part is arranged at the radial inner end, so that an integral frame structure is formed, the stress state of the supporting device is favorably optimized, the non-uniform stress degree of the first supporting piece and the second supporting piece is reduced, and the risk of local instability of the first supporting piece or the second supporting piece is reduced.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a supporting device, a stator assembly and a wind driven generator.
Background
The direct-drive wind driven generator mainly comprises a stator and a rotor, and is divided into an inner rotor direct-drive wind driven generator and an outer rotor direct-drive wind driven generator according to a rotating component. The stator of the outer rotor direct-drive wind driven generator generally comprises a stator core, a stator support and the like. One end of the stator support is connected with the stator core and fixes the stator core; the other end of the stator support is connected with the fixed shaft.
Fig. 1 shows a conventional direct-drive wind turbine 10, wherein a rotor 11 is disposed on an outer side of a stator core 16, the stator core 16 is connected to a fixed shaft 12 through a stator support 14, a support flange 15 is fastened to a fixed shaft flange 13 through bolts, and the stator support 14 in fig. 1 adopts a split type double-flange structure, that is, two independent support plates are respectively connected to the fixed shaft 12 through the support flange 15.
In the operation of the direct drive wind turbine 10, the stator support 14 needs to have sufficient rigidity and strength to ensure a uniform and stable air gap between the stator core 16 and the rotor 11. If the stator support 14 formed by the two support plates as shown in fig. 1 is adopted, because the two support plates are independent from each other, stress borne by the stator support 14 cannot be effectively transferred between the two support plates, and one of the support plates is easily stressed to a large extent, so that local instability of the stator support 14 is caused, uniformity and stability of an air gap between the stator core 16 and the rotor 11 are further influenced, a magnetic field fluctuates, and the power generation efficiency of the direct-drive wind driven generator 10 is reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a supporting device, a stator assembly and a wind driven generator.
The invention solves the technical problems through the following technical scheme:
a support device for supporting a stator of a wind turbine, the support device comprising: a first hollow support and a second hollow support, the radially outer ends of the first and second supports being for securing the stator; the shaft connecting part is connected with the radial inner ends of the first supporting piece and the second supporting piece and is used for connecting a fixed shaft of the wind driven generator; wherein the first support member and the second support member form an integrated frame structure through the shaft connection.
In this scheme, through adopting above structure, through setting up hollow first support piece and hollow second support piece relatively to form strutting arrangement's radial inner and radial outer end, set up the hub connection portion at radial inner simultaneously, and then form holistic frame construction, be favorable to optimizing strutting arrangement's stress state, reduce the inhomogeneous degree of first support piece and second support piece atress, reduce the risk that local unstability appears in first support piece or second support piece. The shaft connecting part is favorable for improving the reliability of connection between the supporting device and the fixed shaft, and the load borne by the supporting device is also favorable for being transmitted to the fixed shaft in time. Therefore, the scheme can improve the rigidity and stability of the supporting device, further improve the stability of an air gap and a magnetic field, and improve the power generation efficiency of the wind driven generator and the service life of the generator.
Preferably, a distance between the first support and the second support becomes larger from the radially inner end to the radially outer end.
In this scheme, through structure more than adopting, from radial inner to radial outer end, through the distance design with first support piece and second support piece for little grow certainly, be favorable to compacter with strutting arrangement's structural design ground to be favorable to improving strutting arrangement's rigidity and stability, and then be favorable to improving the stability in air gap and magnetic field, be favorable to improving aerogenerator's the generating efficiency and the life of generator.
Preferably, the first support further has a step disposed between the radially inner end of the first support and a radially outer end of the first support.
Preferably, the step is used for mounting accessories of the wind driven generator.
In this scheme, through adopting above structure, utilize the step, be favorable to providing the mounted position for aerogenerator's annex for aerogenerator's quick-witted overall structure is compacter, is favorable to reducing the complexity of aerogenerator structure, is favorable to improving the utilization ratio of aerogenerator inner space.
Preferably, the first supporting piece further comprises a disc, and the outer circular surface of the disc is connected with the inner side surface of the step; the disc is used for connecting a brake of the wind driven generator.
In this scheme, through adopting above structure, through installing the stopper to the disc for aerogenerator's overall structure is compacter, is favorable to improving aerogenerator's braking performance.
Preferably, the supporting device further comprises a connecting plate, and the connecting plate is arranged between the first supporting piece and the second supporting piece.
In this scheme, through structure more than adopting, through setting up a plurality of connecting plates between first support piece and second support piece, be favorable to improving strutting arrangement's holistic stability.
Preferably, the shaft connecting portion is further connected to the connecting plate.
In this scheme, through adopting above structure, be connected the axle connecting part design for being connected with the connecting plate, have the loaded peak value that the useful first support piece of reduction and second support piece, be favorable to improving strutting arrangement's whole bearing capacity.
Preferably, the supporting device has a fabrication hole, and the fabrication hole is disposed in at least one of the first supporting member, the second supporting member and the connecting member; the fabrication hole is used for reducing the weight of the supporting device and/or installing accessories of the wind driven generator.
In this scheme, through setting up the fabrication hole, under the prerequisite of guaranteeing strutting arrangement intensity, rigidity and stability, be favorable to reducing strutting arrangement's weight, reduce strutting arrangement's manufacturing cost.
Preferably, the fabrication hole comprises a pipeline hole and/or a manhole.
In this scheme, utilize line hole and/or manhole, be favorable to reducing aerogenerator's the equipment and the degree of difficulty of maintaining, be favorable to reducing aerogenerator's cost for aerogenerator's equipment and maintenance provide sufficient construction space.
Preferably, the accessories include one or more of hydraulic lines, cables and brakes.
In the scheme, the accessories are mounted on the supporting device, so that the overall structure of the wind driven generator is more compact, the complexity of the structure of the wind driven generator is reduced, and the utilization rate of the internal space of the wind driven generator is improved.
Preferably, the shaft connecting part comprises a first flange, a second flange and a flange connecting part, and one end of the first flange is connected with the first supporting part; one end of the second flange is connected with the second supporting piece, and the other end of the first flange and the other end of the second flange are respectively connected with the flange of the fixed shaft; the first flange and the second flange are connected through the flange connecting portion.
In this scheme, through adopting above structure, through with axle connecting portion design first flange, second flange and flange joint portion, simplified the structural style of axle connecting portion. In addition, the first flange is matched with the second flange, and compared with a single flange, the thickness of the single flange is reduced on the premise of ensuring the integral bearing performance of the supporting device.
Preferably, the shaft connecting portion further includes a limiting surface, and the limiting surface is attached to the circumferential surface of the fixed shaft, so that the supporting device is positioned along the radial direction of the fixed shaft.
In this scheme, through adopting above structure, utilize spacing face, improved strutting arrangement radial positioning's precision, be favorable to improving the axiality of strutting arrangement and dead axle, be favorable to improving strutting arrangement's rigidity and stability. Meanwhile, the mounting process of the supporting device is simplified, and the mounting difficulty of the supporting device is favorably reduced.
Preferably, the limiting surface comprises a first surface, and the first surface is perpendicular to the abutting surface of the first flange.
In this scheme, through adopting above structure, with first face design for with the binding face looks perpendicular of first flange, improved strutting arrangement radial positioning's precision, be favorable to improving the axiality of strutting arrangement and dead axle.
Preferably, the limiting surface further comprises a second surface, the second surface is perpendicular to the attaching surface of the second flange, and the second surface protrudes from the attaching surface of the second flange.
In this scheme, through adopting above structure, be perpendicular with the binding face of second flange with the second face design mutually, improved strutting arrangement radial positioning's precision, be favorable to improving the axiality of strutting arrangement and dead axle.
Preferably, the shaft connecting portion further has a groove for reducing the axial rigidity of the first flange and/or the second flange.
In this scheme, through adopting above structure, utilize the recess, reduced the rigidity of first flange and second flange, be favorable to reducing the degree of difficulty of strutting arrangement installation. After the supporting device is installed on the fixed shaft, the first flange and the second flange are respectively attached to the flange surface of the fixed shaft, then the bolt assembly is installed in the flange hole, when pretightening force is applied to the bolt assembly, the pretightening force is gradually increased, due to the existence of the groove, the rigidity of the first flange and/or the second flange is reduced, the first flange and/or the second flange is beneficial to deformation at the groove, the attachment degree of the flange surface is beneficial to improvement, the rigidity of connection of the bolt assembly is further improved, the service life of the bolt is prolonged, and the looseness of the bolt is reduced.
Preferably, the groove is arranged at the joint of the limiting surface and the abutting surface of the first flange and/or the second flange.
In this scheme, through adopting above structure, through handing-over department with the recess setting at the binding face of spacing face and first flange and/or second flange, reduced the rigidity of first flange and/or second flange, be favorable to first flange and/or second flange to take place deformation in the groove, thereby be favorable to improving the laminating degree of flange face, and then improved flange joint's bolted assembly connection's rigidity, be favorable to improving the life of bolt and reducing the not hard up of bolt.
Preferably, the shaft connecting part is a steel casting or a forging.
In this scheme, through adopting above structure, through being cast steel or forging with axle connecting portion design, be favorable to making axle connecting portion for special-shaped structure, be favorable to improving the overall quality of axle connecting portion, the poor problem of welding back machining manufacturability when having avoided the steel sheet preparation.
Preferably, the supporting device further comprises a stator connecting part for connecting and fixing the stator.
In this scheme, through adopting above structure, utilize stator connecting portion, improved strutting arrangement and connected the fastness of stator, be favorable to improving the stability of aerogenerator's air gap.
Preferably, the stator connecting portion includes an axial plate disposed between the first support and the second support, the axial plate having a through hole for fitting with a hole of an inner side surface of the stator.
In this scheme, through adopting above structure, utilize the axial slab fixed at the medial surface of stator, be favorable to improving the fastness of stator installation.
Preferably, the axial plate is also connected with the connecting plate.
In this scheme, through adopting above structure, be connected axial plate and connecting plate, be favorable to improving strutting arrangement's wholeness, optimize strutting arrangement's the loaded situation.
Preferably, the number of the axial plates is multiple, and the multiple axial plates are arranged between the first support and the second support at even intervals along the circumferential direction of the outer edge of the frame structure.
In this scheme, through adopting above structure, be favorable to improving strutting arrangement's symmetry to improve strutting arrangement's stability.
Preferably, the stator connecting portion includes an annular side plate, the annular side plate is connected to the radial outer end of the first supporting member and/or the second supporting member, the annular side plate has a through hole, and the through hole is used for being matched with a hole in the side surface of the stator, so that the firmness of stator installation can be further improved.
According to another aspect of the present invention, there is also provided a stator assembly comprising a stator segment, a plurality of stator segments being spliced to form a stator, characterized in that the stator assembly comprises the supporting device as described above, and the stator segment is connected with a fixed shaft of the wind power generator through the supporting device.
In this scheme, through adopting above structure, utilize strutting arrangement, improved stator structure's rigidity and stability, reduced strutting arrangement and appeared the risk of local unstability, and then improved the stability in aerogenerator air gap and magnetic field, be favorable to improving aerogenerator's generating efficiency and be favorable to improving aerogenerator's life-span.
Preferably, the side plate comprises a plurality of arc-shaped stator block connecting plates connected end to end, and each stator block connecting plate is used for connecting two adjacent stator blocks, so that the stator blocks can be connected into an integral structure by the stator block connecting plates.
In this scheme, through adopting above structure, utilize stator piecemeal connecting plate for different stator piecemeal are connected and are overall structure, are favorable to improving stator module's stability.
Preferably, the stator segment connecting plate is provided with at least two rows of through holes along the radial direction, the row of through holes on the radial inner side is matched with the holes on the first supporting piece and/or the second supporting piece, and the row of through holes on the radial outer side is matched with the holes on the side surface of the stator segment.
In this scheme, through adopting above structure, set up a plurality of through-holes in stator piecemeal connecting plate for stator piecemeal can be connected as overall structure with strutting arrangement, is favorable to improving stator module's stability.
According to another aspect of the invention, a wind power generator is also provided, which is characterized in that the wind power generator set comprises the stator assembly.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
according to the supporting device, the hollow first supporting piece and the hollow second supporting piece are arranged oppositely, the radial inner end and the radial outer end of the supporting device are formed, and the shaft connecting part is arranged at the radial inner end, so that an integral frame structure is formed, the stress state of the supporting device is favorably optimized, the degree of uneven stress of the first supporting piece and the second supporting piece is reduced, and the risk of local instability of the first supporting piece or the second supporting piece is reduced. The invention can improve the rigidity and stability of the supporting device, further improve the stability of the air gap and the magnetic field, improve the generating efficiency of the wind driven generator and prolong the service life of the generator.
Drawings
Fig. 1 is a schematic structural diagram of a stator support of a split type double-flange structure in the prior art.
Fig. 2 is a schematic structural diagram of a supporting device according to embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of a cross section of a supporting device in embodiment 1 of the present invention.
Fig. 4 is a structural view of a section in which the supporting device of embodiment 1 of the present invention is mounted to a fixed shaft.
Fig. 5 is a schematic structural view of a section of a flange connection portion in the supporting device according to embodiment 1 of the present invention.
Fig. 6 is a schematic structural view of a stator assembly according to embodiment 2 of the present invention.
Fig. 7 is a schematic structural view of a stator connecting plate in a stator assembly according to embodiment 2 of the present invention.
Description of reference numerals:
Connecting piece 23
Connection plate 231
Radially inner end 24
Radial outer end 25
Step 27
Disc 29
Brake 31
Bearing 32
Rotating shaft 33
Brake disc 34
First flange 41
Second flange 42
Limiting surface 44
Axial plate 51
First side plate 52
Stator blocking connecting plate 61
Detailed Description
The invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the invention is not limited thereto.
Example 1
As shown in fig. 2 to 5, the present embodiment is a supporting device 20 for supporting a stator of a wind turbine, the supporting device 20 including: a hollow first support 21 and a hollow second support 22, the radially outer ends 25 of the first and second supports 21 and 22 being used for fixing the stator; and a shaft connecting portion 40 connected to the radially inner ends 24 of the first and second supports 21 and 22, the shaft connecting portion 40 being for connecting the fixed shaft 12 of the wind power generator; the first support member 21 and the second support member 22 form an integrated frame structure through the shaft connecting portion 40. In this scheme, through setting up hollow first support piece 21 and hollow second support piece 22 relatively to form strutting arrangement 20's radial inner end 24 and radial outer end 25, set up hub connection portion 40 at radial inner end 24 simultaneously, and then form holistic frame construction, be favorable to optimizing strutting arrangement 20's stress state, reduce the inhomogeneous degree of first support piece 21 and second support piece 22 atress, reduce the risk that local unstability appears in first support piece 21 or second support piece 22. The embodiment can improve the rigidity and stability of the supporting device 20, further improve the stability of the air gap and the magnetic field, and improve the generating efficiency of the wind driven generator and the service life of the generator. As shown in fig. 2, the first supporting member 21 and the second supporting member 22 of the present embodiment are disposed opposite to each other and form a radial inner end 24 and a radial outer end 25 of the supporting device 20. The radial outer end 25 of the supporting device 20 is used for fixing the stator, the radial inner end 24 of the supporting device 20 is used for connecting the shaft connecting part 40, and the shaft connecting part 40 is connected with the fixed shaft 12 of the wind driven generator.
In a preferred embodiment, the support device 20 is designed as a whole in the form of a cylinder. In the embodiment, the supporting device 20 is integrally designed to be cylindrical, which is beneficial to optimizing the stress state of the supporting device 20 and simplifying the design form of the supporting device 20.
In order to improve the stability of the supporting device 20, the first supporting member 21 and the second supporting member 22 may further have rib plates 26, and the radially inner end 24 and the radially outer end 25 are connected by the rib plates 26. In this embodiment, the rib 26 is used to connect the radial outer end 25 and the radial inner end 24, which is beneficial to transmitting the load borne by the support device 20 to the fixed shaft 12 and improving the stability of the support device 20.
In the present embodiment, both the end surface of the radially inner end 24 and the end surface of the radially outer end 25 may be circular ring surfaces. In the present embodiment, the radial inner end 24 and the radial outer end 25 having the circular ring surface are utilized to facilitate the connection between the supporting device 20 and the fixed shaft 12 and the stator, and to optimize the stress state of the supporting device 20.
In the present embodiment, the connecting member 23 is a connecting plate 231, and the connecting plate 231 is disposed between the first support 21 and the second support 22. The present embodiment can further improve the overall stability of the supporting device 20 by connecting the plurality of connecting plates 231 between the first supporting member 21 and the second supporting member 22.
In a preferred embodiment, the distance between the first support 21 and the second support 22 increases from the radially inner end 24 to the radially outer end 25. In this embodiment, the distance between the first supporting member 21 and the second supporting member 22 is designed to be small and large from the radial inner end 24 to the radial outer end 25, which is beneficial to making the structural design of the supporting device 20 more compact, thereby being beneficial to improving the rigidity and stability of the supporting device 20, further being beneficial to improving the stability of the air gap and the magnetic field, and being beneficial to improving the power generation efficiency of the wind driven generator and the service life of the generator.
In order to reduce the weight of the supporting device 20, as shown in fig. 3, the connection plate 231 may also be designed as a hollow structure. In this embodiment, the connecting plate 231 having a hollow structure is used, so that the weight of the connecting plate 231 is reduced on the premise of ensuring the stability of the supporting device 20. Reinforcing ribs can be arranged on the inner side face of the hollow structure of the connecting plate 231, so that the stability of the supporting device 20 is further improved.
To facilitate the attachment mounting, as shown in fig. 3 and 4, the first support 21 may further include a step 27, the step 27 being disposed between the radially inner end 24 of the first support 21 and the radially outer end 25 of the first support 21, the step 27 being used for mounting the attachment of the wind turbine. The step 27 is utilized in the embodiment, so that the installation position of the accessories of the wind driven generator is provided, the overall structure of the wind driven generator is more compact, the complexity of the structure of the wind driven generator is reduced, and the utilization rate of the internal space of the wind driven generator is improved. In one embodiment, the inner side surface of the step 27 is a circular surface, and the axis of the circular surface is collinear with the axis of the fixed shaft 12 of the wind turbine. In the embodiment, the circular surface is designed to be collinear with the axis of the fixed shaft 12, which is beneficial to improving the coaxiality of the accessories mounted on the step 27, so that the overall structure of the wind driven generator is more compact, and the quality of mounting the accessories is improved.
As a preferred embodiment, the step 27 is provided between the radially inner end 24 of the first support 21 and the radially outer end 25 of the first support 21. The step 27 is used for mounting accessories of the wind turbine. Specifically, the first supporting member 21 further includes a disk 29, and an outer circumferential surface of the disk 29 is connected to an inner side surface of the step 27; the attachment comprises a stopper 31, the stopper 31 being connected to the disc 29. The present embodiment makes the overall structure of the wind turbine more compact by mounting the brake 31 to the disc 29, which is advantageous for improving the braking performance of the wind turbine. In other embodiments, the accessory may also be other components, such as hydraulic lines, cables, and the like. In the embodiment, the accessories are mounted on the supporting device 20, so that the overall structure of the wind driven generator is more compact, the complexity of the structure of the wind driven generator is reduced, and the utilization rate of the internal space of the wind driven generator is improved.
As shown in fig. 3 and 4, the supporting device 20 of the present embodiment integrates a mounting structure for mounting the brake 31 and the wind wheel lock, so that the overall structure of the wind turbine generator is more compact. The brake 31 is mounted on a disc 29 of the support device 20, which disc 29 is welded to the step 27. When the wind driven generator needs to be braked, the brake 31 clamps the brake disc 34 installed on the rotating shaft 33, so that the wind driven generator can be decelerated until the wind driven generator stops. During maintenance of the wind turbine, the wind wheel lock mounted on the support device 20 pushes in the brake disc 34, which is mounted on the rotating shaft 33, thereby preventing the wind turbine from rotating.
As a specific embodiment, as shown in fig. 2, the supporting device 20 may further have a process hole 28, and the process hole 28 is disposed at least in one of the first supporting member 21, the second supporting member 22 and the connecting member 23; the fabrication holes 28 are used to reduce the weight of the support device 20 and/or to mount accessories of the wind turbine. In the embodiment, the fabrication holes 28 are disposed, so that the weight of the supporting device 20 is reduced and the manufacturing cost of the supporting device 20 is reduced on the premise of ensuring the stability of the supporting device 20. The fabrication holes 28 can be designed according to actual needs. As a preferred embodiment, the process holes 28 may also be uniformly spaced along the circumference of the support device 20, which also achieves the purpose of reducing the weight of the support device 20. Specifically, the tooling holes 28 include line holes and/or manholes. The embodiment utilizes the pipeline hole and/or the manhole, is favorable for reducing the difficulty of the assembly and the maintenance of the wind driven generator, provides sufficient construction space for the assembly and the maintenance of the wind driven generator, and is favorable for reducing the cost of the wind driven generator.
To improve the overall load-bearing performance of the support device 20, the shaft connection portion 40 may also be connected with the connection plate 231. In the embodiment, the shaft connecting portion 40 is designed to be connected to the connecting plate 231, which is beneficial to reducing the load peak of the first supporting member 21 and the second supporting member 22 and improving the overall load capacity of the supporting device 20.
In the present embodiment, as shown in fig. 3, the shaft connecting portion 40 includes a first flange 41, a second flange 42 and a flange connecting portion 43, one end of the first flange 41 is connected to the first support 21; one end of the second flange 42 is connected to the second supporting member 22, and the other end of the first flange 41 and the other end of the second flange 42 are respectively connected to the flanges of the fixed shaft 12; the first flange 41 and the second flange 42 are connected by a flange connection 43. In the present embodiment, the shaft connecting portion 40 is simplified in structure by designing the shaft connecting portion 40 as the first flange 41, the second flange 42, and the flange connecting portion 43. In addition, by matching the first flange 41 with the second flange 42, compared with a single flange, the thickness of the single flange is reduced on the premise of ensuring the overall bearing performance of the supporting device 20.
In a preferred embodiment, the shaft connecting portion 40 further includes a limiting surface 44, and the limiting surface 44 is attached to the circumferential surface of the fixed shaft 12 to position the supporting device 20 along the radial direction of the fixed shaft 12. In the embodiment, the limiting surface 44 is utilized, so that the radial positioning precision of the supporting device 20 is improved, the coaxiality of the supporting device 20 and the fixed shaft 12 is favorably improved, and the rigidity and the stability of the supporting device 20 are favorably improved. Meanwhile, the mounting process of the supporting device 20 is simplified, and the mounting difficulty of the supporting device 20 is reduced.
Specifically, as shown in fig. 5, in the present embodiment, the position-limiting surface 44 includes a first surface 441, and the first surface 441 is perpendicular to the abutting surface of the first flange 41. In this embodiment, the first surface 441 is perpendicular to the attachment surface of the first flange 41, so that the radial positioning accuracy of the supporting device 20 is improved, and the stability of the supporting device 20 is improved. The position-limiting surface 44 further includes a second surface 442, the second surface 442 is perpendicular to the engaging surface of the second flange 42, and the second surface 442 protrudes from the engaging surface of the second flange 42. In this embodiment, the second surface 442 is perpendicular to the abutting surface of the second flange 42, so as to improve the radial positioning accuracy of the supporting device 20, which is beneficial to improving the stability of the supporting device 20.
As a preferred embodiment, the shaft connection 40 may further have a groove 45, and the groove 45 is used to reduce the axial rigidity of the first flange 41 and/or the second flange 42. The present embodiment utilizes the groove 45 to reduce the rigidity of the first flange 41 and/or the second flange 42, which is beneficial to reducing the difficulty of installing the supporting device 20. After the supporting device 20 is installed on the fixed shaft 12, the first flange 41 and the second flange 42 are respectively attached to the flange surface of the fixed shaft flange 13 of the fixed shaft 12, then the bolt assembly 46 is installed in the flange hole, when pretightening force is applied to the bolt assembly 46, the pretightening force is gradually increased, due to the existence of the groove 45, the rigidity of the first flange 41 and/or the second flange 42 is reduced, deformation of the first flange 41 and/or the second flange 42 at the groove 45 is facilitated, the attachment degree of the flange surface is facilitated to be improved, the connection rigidity of the bolt assembly 46 is further improved, the service life of bolts is prolonged, and loosening of the bolts is facilitated to be improved.
Specifically, as shown in fig. 5, the groove 45 is disposed at the intersection of the first flange 41 and the first surface 441 in the present embodiment, and in other embodiments, the groove 45 is disposed at the intersection of the limiting surface 442 and the abutting surface of the second flange 42. In the embodiment, the groove 45 is formed in the joint of the limiting surface 44 and the joint surface of the first flange 41 and/or the second flange 42, so that the rigidity of the first flange 41 and/or the second flange 42 is reduced, deformation of the first flange 41 and/or the second flange 42 in the groove 45 is facilitated, the joint degree of the flange surface is facilitated to be improved, the rigidity of connection of the bolt assembly 46 of the flange connection is further improved, the service life of the bolt is prolonged, and loosening of the bolt is reduced.
The shaft connection 40 may also be a steel casting or forging as a preferred embodiment. This embodiment is through designing axle connecting portion 40 for steel casting or forging, is favorable to making axle connecting portion 40 into the dysmorphism structure, is favorable to improving the overall quality of axle connecting portion 40, and the poor problem of welding back machine tooling manufacturability when having avoided the steel sheet preparation. In the present embodiment, the shaft connecting portion 40 is a forged piece.
In order to improve the firmness of the stator connection, the supporting device 20 may further include a stator connection portion 50, and the stator connection portion 50 is used for connecting and fixing the stator. In the embodiment, the stator connecting part 50 is utilized, so that the firmness of the supporting device 20 connected with the stator is improved, and the improvement of the stability of the air gap of the wind driven generator is facilitated.
Specifically, in the present embodiment, as shown in fig. 2, the stator connecting portion 50 includes an axial plate 51, the axial plate 51 is disposed between the first support 21 and the second support 22, and the axial plate 51 has a through hole for fitting with a hole of an inner side surface of the stator segment. In this embodiment, the axial plate 51 is fixed on the inner side surface of the stator, which is beneficial to improving the firmness of the stator blocks.
In the present embodiment, the number of the axial plates 51 is plural, and the plural axial plates 51 are disposed between the first support 21 and the second support 22 at even intervals along the circumferential direction of the outer edge of the overall frame structure of the support device. The present embodiment provides a plurality of axial plates 51 at even intervals along the circumferential direction, which is beneficial to improving the symmetry of the supporting device 20, thereby improving the stability of the supporting device 20.
In order to further improve the mounting stability of the stator, the stator connecting portion 50 includes a first side plate 52 and a second side plate 53, the first side plate 52 is connected to the first support 21, the second side plate 53 is connected to the second support 22, and the stator is mounted between the first side plate 52 and the second side plate 53. Specifically, the first side plate 52 and the second side plate 53 each have a through hole for matching with a hole in the side surface of the stator. In the present embodiment, the first side plate 52 and the second side plate 53 are used to further improve the firmness of the stator block installation. In other embodiments, only one annular side plate may be used to connect the first support 21 or the second support 22, and the invention is not limited thereto.
As a preferred embodiment, the axial plate 51 is also connected to the connecting piece 23. The present embodiment connects the axial plate 51 to the connecting member 23, which is beneficial to improve the integrity of the supporting device 20 and optimize the loading condition of the supporting device 20.
Example 2
As shown in fig. 6 and 7, the present embodiment is a stator assembly 60, which includes a stator segment 62 and the supporting device 20 of embodiment 1, wherein the stator segment 62 is connected to the fixed shaft 12 of the wind turbine through the supporting device 20. In the embodiment, the supporting device 20 is utilized to improve the stability of the air gap and the magnetic field, which is beneficial to improving the generating efficiency of the wind driven generator. Meanwhile, the risk of local instability of the supporting device 20 is reduced, and the service life of the wind driven generator is prolonged.
In the present embodiment, a plurality of stator segments 62 are joined together to form a ring stator.
In one embodiment, the annular side plate of the stator connecting portion is formed by connecting a plurality of arc-shaped stator block connecting plates 61 end to end. Every stator piecemeal connecting plate 61 is used for linking together two adjacent stator piecemeal 62, and the junction of two adjacent stator piecemeal 62 and the junction of two adjacent stator piecemeal connecting plates 61 stagger the setting each other promptly to a plurality of stator piecemeal connecting plates 61 can be connected a plurality of stator piecemeal 62 and be overall structure, are favorable to improving stator assembly 60's stability.
Specifically, as shown in fig. 7, the stator block connecting plate 61 has a plurality of through holes, and the plurality of through holes are uniformly distributed in the circumferential direction; at least two rows of through holes are arranged along the radial direction of the fixed shaft 12, the through holes in the radial inner side row are matched with the holes of the first supporting piece and/or the second supporting piece, and the through holes in the radial outer side row are matched with the holes in the side face of the stator sub-block.
In the present embodiment, the supporting device 20 and the stator segment 62 may be coupled by: a. the stator sub-block connecting plates 61 are connected with the first supporting piece 21, the second supporting piece 22 and the stator sub-blocks 62 on the end faces, the number of the stator sub-block connecting plates 61 is the same as that of the stator sub-blocks 62, and the joints of two adjacent stator sub-block connecting plates 61 are staggered with the joints of two adjacent stator sub-blocks 62, so that the utilization rate of plates is improved, and the possibility of failure of the joints of the stator sub-block connecting plates 61 is reduced. b. The axial plate of the circumferential surface of the radially outer end 25 of the support device 20 is provided with a threaded hole to radially couple the support device 20 and the stator segment 62, thereby improving the coupling reliability.
Example 3
This embodiment is a wind power generator and the wind power generator set includes a stator assembly 60 as in embodiment 2. The stator assembly 60 is utilized in the embodiment, so that the air gap and the magnetic field of the wind driven generator are more stable, and the power generation efficiency of the wind driven generator is improved.
As an embodiment, the wind power generator of the present embodiment can be assembled by the following method (for convenience of description, this embodiment is combined with fig. 4 in embodiment 1 and fig. 6 in embodiment 2): the wind turbine lock is mounted to the support means 20 first, and then the right portion of the brake 31 is mounted to the support means 20. The stator segment 62 is then coupled to the support assembly 20 and the assembly of the stator segment associated components is completed.
The stator assembly 60 is then nested into the fixed shaft 12; then the bearing 32 at the right side is sleeved into the fixed shaft 12; then the brake disc 34 is arranged on the rotating shaft 33, and then the rotating shaft 33 provided with the brake disc 34 is sleeved into the right bearing 32; then the left bearing 32 is sleeved on the fixed shaft 12, then the left part of the brake 31 is arranged on the supporting device 20, and finally the rotor 11 is sleeved on the rotating shaft 33. After the mounting was completed, the structure as shown in fig. 4 in example 1 was formed. The air gap and the magnetic field of the wind driven generator are more stable, and the generating efficiency of the wind driven generator is improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (19)
1. A support device for supporting a stator of a wind turbine, the support device comprising:
a first hollow support and a second hollow support, the radially outer ends of the first and second supports being for securing the stator; and
the shaft connecting part is connected with the radial inner ends of the first supporting piece and the second supporting piece and is used for connecting a fixed shaft of the wind driven generator; wherein the first support member and the second support member form an integrated frame structure through the shaft connection.
2. The support device of claim 1, wherein a distance between the first support and the second support increases from the radially inner end to the radially outer end.
3. The support device of claim 2, wherein the first support further has a step disposed between the radially inner end of the first support and a radially outer end of the first support.
4. The support device of claim 3, wherein the step is adapted to mount an accessory to the wind turbine.
5. The support device of claim 3, wherein the first support member further comprises a disc, an outer circumferential surface of the disc being connected to an inner side surface of the step; the disc is used for connecting a brake of the wind driven generator.
6. The support device of claim 1, further comprising a connecting plate disposed between the first support and the second support.
7. The support device of claim 6, wherein the support device has a fabrication hole provided at least one of the first support, the second support and the connection plate; the fabrication hole is used for reducing the weight of the supporting device and/or installing accessories of the wind driven generator.
8. The support device of claim 7, wherein the fabrication hole comprises a pipeline hole and/or a manhole; the accessories include one or more of hydraulic lines, cables, and brakes.
9. The support device of claim 6, wherein the shaft connection is further connected to the connection plate.
10. The support device of claim 1, wherein the shaft coupling portion comprises a first flange, a second flange, and a flange coupling portion, one end of the first flange being coupled to the first support member; one end of the second flange is connected with the second supporting piece, and the other end of the first flange and the other end of the second flange are respectively connected with the flange of the fixed shaft; the first flange and the second flange are connected through the flange connecting portion.
11. The support device of claim 10, wherein the shaft coupling portion further comprises a retaining surface that engages a circumferential surface of the fixed shaft to radially position the support device along the fixed shaft.
12. The support device of claim 11, wherein the stop surface comprises a first surface that is perpendicular to the abutting surface of the first flange.
13. The support device of claim 12, wherein the retention surface further comprises a second surface perpendicular to the abutting surface of the second flange, the second surface protruding beyond the abutting surface of the second flange.
14. The support device of claim 13, wherein the shaft connecting portion further has a groove for reducing rigidity of the first flange and/or the second flange in the axial direction.
15. The support device of claim 14, wherein the recess is provided at an interface of the stop surface and the abutment surface of the first flange and/or the second flange.
16. The support device of claim 9, wherein the shaft connection is a steel casting or forging.
17. A stator assembly comprising stator segments, characterized in that the stator assembly comprises a support device according to any of claims 1-16, via which the stator segments are connected to the fixed shaft of the wind turbine.
18. The stator assembly of claim 17, wherein the support means further comprises an annular side plate coupled to a radially outer end of the first and/or second support members, the annular side plate formed by a plurality of stator segment connecting plates coupled end to end, each stator segment connecting plate for coupling two adjacent stator segments to couple the stator segments together as a unitary structure.
19. A wind generator, characterized in that the wind turbine comprises a stator assembly according to any of claims 17-18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911087592.4A CN110829644A (en) | 2019-11-08 | 2019-11-08 | Support device, stator module and wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911087592.4A CN110829644A (en) | 2019-11-08 | 2019-11-08 | Support device, stator module and wind driven generator |
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| Publication Number | Publication Date |
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| CN110829644A true CN110829644A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911087592.4A Pending CN110829644A (en) | 2019-11-08 | 2019-11-08 | Support device, stator module and wind driven generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114313571A (en) * | 2020-09-29 | 2022-04-12 | 新疆金风科技股份有限公司 | Support tool and method for assembling motor module |
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| CN103078424A (en) * | 2013-01-10 | 2013-05-01 | 国电联合动力技术有限公司 | Inner stator bracket for direct-drive generator |
| CN107979225A (en) * | 2017-12-29 | 2018-05-01 | 北京金风科创风电设备有限公司 | motor and wind generating set with small bearing structure |
| CN110266122A (en) * | 2019-07-25 | 2019-09-20 | 上海电气风电集团有限公司 | Stator structure and wind-driven generator including it |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078424A (en) * | 2013-01-10 | 2013-05-01 | 国电联合动力技术有限公司 | Inner stator bracket for direct-drive generator |
| CN107979225A (en) * | 2017-12-29 | 2018-05-01 | 北京金风科创风电设备有限公司 | motor and wind generating set with small bearing structure |
| CN110266122A (en) * | 2019-07-25 | 2019-09-20 | 上海电气风电集团有限公司 | Stator structure and wind-driven generator including it |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114313571A (en) * | 2020-09-29 | 2022-04-12 | 新疆金风科技股份有限公司 | Support tool and method for assembling motor module |
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