CN216056496U

CN216056496U - Fastening end plate structure of aluminum winding direct-drive permanent magnet wind driven generator

Info

Publication number: CN216056496U
Application number: CN202121987536.9U
Authority: CN
Inventors: 丛啸桀; 俞文斌; 王刚; 黄娜; 李丹
Original assignee: Xi'an Zhongche Yongdian Jieli Wind Energy Co ltd
Current assignee: Xi'an Zhongche Yongdian Jieli Wind Energy Co ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-03-15
Anticipated expiration: 2031-08-23

Abstract

The utility model belongs to the technical field of wind driven generators and relates to a buckling end plate structure of an aluminum winding direct-drive permanent magnet wind driven generator. Through increasing lock joint end plate structure in stator core both sides, utilize the intensity of bump on the first stator punching and the through-hole on the second stator punching to guarantee lock joint formula end plate, both guaranteed unshakable in one's determination effective length unchangeable, increased unshakable intensity again to effectively restrain stator core's tooth portion tooth and rise. Moreover, the whole buckling end plate structure is formed by laminating the stator punching sheets with the salient points and the through holes, and has the advantages of high strength and low cost.

Description

Fastening end plate structure of aluminum winding direct-drive permanent magnet wind driven generator

Technical Field

The utility model belongs to the technical field of wind driven generators, relates to an aluminum winding iron core structure, and particularly relates to a buckling end plate structure of an aluminum winding direct-drive permanent magnet wind driven generator.

Background

The wind power generator converts wind energy into electric energy, is a clean renewable energy source, and receives more and more attention. Among a plurality of generator types, the direct-drive permanent magnet wind driven generator has the characteristics of simple structure, high transmission efficiency, high reliability and the like, and is one of main machine types in the wind power industry. Along with the development of the wind driven generator, the economical efficiency of the wind driven generator is more and more emphasized, in order to bring better economic benefit, the stator winding of the direct-drive permanent magnet wind driven generator adopts the aluminum winding, and compared with the copper winding, the cost of the coil adopting the aluminum winding structure can be reduced by 30%.

The current aluminum winding core structure comprises: the stator core, the stator tooth pressing plate, the end plate and the stator pull rod are matched with each other through the tooth pressing plate to control tooth expansion of the tooth part of the stator core. But due to the resistivity of aluminum 2.83x10^-8Ω · m, resistivity of copper 1.75x10^-8Omega · m, in order to maintain the efficiency of the generator and reduce the winding loss after the generator adopts the aluminum winding, the line resistance of the generator adopting the aluminum winding is required to be kept equivalent to the line resistance of the copper winding, so that the sectional area of the aluminum winding is larger than that of the copper winding, and under the condition that the excircle size of the stator punching sheet is not changed, the tooth part of the stator punching sheet of the generator adopting the aluminum winding is small, so that the tooth part of the stator core is difficult to be ensured to expand by adopting the traditional iron core structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a fastening end plate structure of an aluminum winding direct-drive permanent magnet wind driven generator, which increases the strength of two sides of an iron core of the generator and can effectively inhibit the tooth expansion of a tooth part of the iron core of a stator under the condition of ensuring the effective length of the iron core.

The purpose of the utility model is solved by the following technical scheme:

the buckling end plate structure of the aluminum winding direct-drive permanent magnet wind driven generator is formed by laminating a first stator punching sheet and a second stator punching sheet, a plurality of salient points are arranged on the first stator punching sheet, and through holes matched with the salient points are formed in the second stator punching sheet.

Further, the through hole is a rectangular through hole.

Further, the number of the through holes is not less than that of the salient points.

Further, the through hole corresponds to the position of the salient point.

Furthermore, the buckling end plate structures are respectively positioned on the upper end surface and the lower end surface of the generator stator core.

Further, the generator stator core is formed by mutually laminating a plurality of stator punching sheets A along the axial direction.

Furthermore, the outer side edge of the stator punching sheet A is provided with uniformly distributed coil caulking grooves.

Furthermore, the coil caulking groove is a long strip-shaped caulking groove perpendicular to the outer side edge, symmetrical groove wedges for fixing the coil are arranged in the notch of the long strip-shaped caulking groove, and the coil is an aluminum winding coil.

Further, the stator punching sheet A is made of non-oriented silicon steel sheets.

Furthermore, the pressure value applied to the first stator punching sheet and the second stator punching sheet which are well laminated is 32Mpa, and the irregularity is ensured to be less than 0.1 mm.

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: through increasing lock joint end plate structure in stator core both sides, utilize the intensity of bump on the first stator punching and the through-hole on the second stator punching to guarantee lock joint formula end plate, both guaranteed unshakable in one's determination effective length unchangeable, increased unshakable intensity again to effectively restrain stator core's tooth portion tooth and rise. Moreover, the whole buckling end plate structure is formed by laminating the stator punching sheets with the salient points and the through holes, and has the advantages of high strength and low cost.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a structural diagram of a fastening end plate of an aluminum winding direct-drive permanent magnet wind power generator provided by the utility model;

FIG. 2 is a side view of FIG. 1;

fig. 3 is a schematic structural diagram of a first stator punching provided by the utility model;

FIG. 4 is an enlarged view of portion A-A of FIG. 3;

fig. 5 is a schematic structural diagram of a second stator punching sheet provided by the utility model.

Wherein: 1. a first stator punching sheet; 2. a second stator lamination; 3. salient points; 4. and a through hole.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of structures consistent with certain aspects of the utility model, as detailed in the appended claims.

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.

Example 1

Referring to fig. 1-5, the embodiment provides a fastening end plate structure of an aluminum winding direct-drive permanent magnet wind turbine, the fastening end plate structure is formed by laminating a first stator punching sheet 1 and a second stator punching sheet 2, a plurality of salient points 3 are arranged on the first stator punching sheet 1, and through holes 4 matched with the salient points 3 are arranged on the second stator punching sheet 2.

Further, the through hole 4 is a rectangular through hole.

Further, the number of the through holes 4 is not less than that of the bumps 3.

Further, the through hole 4 corresponds to the position of the bump 3; the number of the salient points 3 can be determined through finite element simulation analysis, the number of the salient points 3 cannot be too large or too small, the magnetic circuit of the generator can be influenced if the number of the salient points is too large, and the strength of the end fastening end plate can be influenced if the number of the salient points is too small.

The finite element simulation analysis method comprises the following steps: firstly, calculating inter-sheet pressure P of two punching sheets according to the stacking pressure required by the buckling end plate, simplifying a model, taking one tooth of the buckling end plate for analysis, and then obtaining the positive pressure of each tooth: and F, PA (A is the area of each tooth), and calculating the shearing force required to bear by each buckling point through a shearing force equation and a bending moment equation so as to determine the number of the buckling points.

Furthermore, the buckling end plate structures are respectively positioned on two sides of the generator stator core.

Furthermore, the generator stator core is formed by mutually laminating a plurality of stator punching sheets A along the axial direction.

In conclusion, the fastening end plate structure of the aluminum winding direct-drive permanent magnet wind driven generator provided by the utility model can replace a bonding end plate and a tooth pressing plate of a traditional stator iron core. The specific preparation process is as follows:

firstly, a punching die is used for manufacturing a first stator punching 1 provided with a plurality of salient points 3, referring to fig. 1, and then a second stator punching 2 provided with through holes 4 matched with the salient points is manufactured;

then, laminating and molding the first stator punching sheet 1 and the second stator punching sheet 1;

and finally, applying pressure of 32Mpa to the laminated punching sheets, maintaining the pressure for 10min, and ensuring firm fastening, wherein the irregularity is less than 0.1 mm.

In summary, the buckling end plate structures are added on the two sides of the stator core, and the strength of the buckling end plate is ensured by using the friction force between the salient points 3 on the first stator lamination 1 and the through holes 4 on the second stator lamination 2, so that the effective length of the core is ensured to be unchanged, the strength of the core is increased, and the tooth expansion of the teeth of the stator core is effectively inhibited. Moreover, the whole buckling end plate structure is formed by laminating the stator punching sheets with the salient points and the through holes, and has the advantages of high strength and low cost.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model.

It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. The utility model provides an aluminium winding directly drives permanent magnet wind power generator lock joint end plate structure, its characterized in that, lock joint end plate structure is folded by first stator punching (1) and second stator punching (2) and is pressed and form, be equipped with a plurality of bumps (3) on first stator punching (1), be equipped with on the second stator punching with through-hole (4) of bump (3) looks adaptation.

2. The buckling end plate structure of the aluminum winding direct-drive permanent magnet wind turbine generator as claimed in claim 1, wherein the through hole (4) is a rectangular through hole.

3. The fastening end plate structure of the aluminum winding direct-drive permanent magnet wind turbine generator as claimed in claim 1, wherein the number of the through holes (4) is not less than the number of the salient points (3).

4. The fastening end plate structure of the aluminum winding direct-drive permanent magnet wind turbine generator as claimed in claim 1, wherein the through holes (4) correspond to the bumps (3).

5. The fastening end plate structure of the aluminum winding direct-drive permanent magnet wind power generator as claimed in claim 1, wherein the fastening end plate structure is respectively located on the upper end surface and the lower end surface of a stator core of the generator.

6. The fastening end plate structure of the aluminum winding direct-drive permanent magnet wind turbine generator as claimed in claim 1, wherein the generator stator core is formed by a plurality of stator laminations A which are stacked and pressed with each other along an axial direction.

7. The fastening end plate structure of the aluminum winding direct-drive permanent magnet wind turbine generator as claimed in claim 6, wherein the outer side edge of the stator lamination A is provided with uniformly distributed coil caulking grooves.

8. The fastening end plate structure of the aluminum winding direct-drive permanent magnet wind power generator as claimed in claim 7, wherein the coil caulking groove is a long strip-shaped caulking groove perpendicular to the outer side edge, symmetrical groove wedges for fixing the coil are arranged in a notch of the long strip-shaped caulking groove, and the coil is an aluminum winding coil.

9. The fastening end plate structure of the aluminum winding direct-drive permanent magnet wind turbine generator as claimed in any one of claims 6 to 8, wherein the stator lamination A is made of non-oriented silicon steel sheets.

10. The fastening end plate structure of the aluminum winding direct-drive permanent magnet wind power generator as claimed in claim 1, wherein the pressure value applied to the laminated first stator lamination (1) and second stator lamination (2) is 32Mpa, and the irregularity is ensured to be less than 0.1 mm.