CN111181273A

CN111181273A - Magnetic pole fixing device of permanent magnet wind driven generator and permanent magnet wind driven generator

Info

Publication number: CN111181273A
Application number: CN202010016199.2A
Authority: CN
Inventors: 王嗣翔; 吴立建; 闻汇; 方攸同
Original assignee: Zhejiang University ZJU; Shanghai Electric Wind Power Group Co Ltd
Current assignee: Zhejiang University ZJU; Shanghai Electric Wind Power Group Co Ltd
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-05-19
Anticipated expiration: 2039-04-11
Also published as: CN110011443A; CN110011443B; WO2020207227A1; CN111181273B

Abstract

The invention discloses a magnetic pole fixing device of a permanent magnet wind driven generator and the permanent magnet wind driven generator. The plurality of grooves are arranged at intervals along the circumferential direction of the rotor, the cross sections of the grooves are quadrilateral, and accommodating spaces for accommodating the magnetic pole modules are formed; the two axial limiting assemblies are respectively arranged at two ends of the plurality of grooves along the axial direction of the rotor so as to limit the movement of the magnetic pole module along the axial direction of the rotor; the radial limiting assembly is used for limiting the movement of the magnetic pole module along the radial direction of the rotor; the plurality of circumferential limiting pieces are respectively arranged at two ends of the plurality of grooves in the circumferential direction of the rotor so as to limit the movement of the magnetic pole module in the circumferential direction of the rotor. The invention effectively overcomes the defects of higher groove processing difficulty and higher matching precision requirement of the magnetic pole module and the groove in the prior art.

Description

Magnetic pole fixing device of permanent magnet wind driven generator and permanent magnet wind driven generator

The application is a divisional application of patent applications with application date of 2019, 4, and 11, application number of 201910288954X, and entitled "magnetic pole fixing device of permanent magnet wind driven generator and permanent magnet wind driven generator".

Technical Field

The invention relates to the field of wind power generation, in particular to a magnetic pole fixing device of a permanent magnet wind driven generator and the permanent magnet wind driven generator.

Background

A rotor of the large permanent magnet wind driven generator is provided with a plurality of permanent magnets, in particular rare earth permanent magnets such as neodymium iron boron and the like as magnetic poles. When the generator operates, the permanent magnet is easily dropped from the rotor under the influence of various factors such as temperature, humidity, vibration, alternating electromagnetic force and the like in a working environment, and the safe and reliable operation of the motor is influenced, so that the fixing and packaging modes of the rotor magnetic steel of the permanent magnet wind driven generator are very critical.

At present, a common permanent magnet fixing method is as follows: the permanent magnet is packaged in the magnetic pole module box, the rotor is provided with a T-shaped groove, the magnetic pole module is implemented into a shape matched with the groove, and the magnetic pole module is pushed into the groove arranged on the rotor along the axial direction of the generator during installation. The method has the greatest advantages that the magnetic pole module can be installed after the rotor and the stator are assembled, but the T-shaped groove is high in processing cost, and the requirement on the matching precision of the magnetic pole module and the groove is high.

In conclusion, the prior art has the defects of higher groove processing difficulty and higher requirement on the matching precision of the magnetic pole module and the groove.

Disclosure of Invention

The invention aims to overcome the defects of high groove processing difficulty and high matching precision requirement of a magnetic pole module and a groove in the prior art, and provides a magnetic pole fixing device of a permanent magnet wind driven generator and the permanent magnet wind driven generator.

The invention solves the technical problems through the following technical scheme:

a magnetic pole fixing device of a permanent magnet wind power generator is used for fixing a plurality of magnetic pole modules on a rotor of the permanent magnet wind power generator, and is characterized in that the magnetic pole fixing device of the permanent magnet wind power generator comprises:

the plurality of grooves are arranged on the side surface of the rotor adjacent to the air gap and extend towards the inside of the rotor, the plurality of grooves are arranged at intervals along the circumferential direction of the rotor, the cross section of each groove is quadrilateral, and an accommodating space for accommodating the magnetic pole module is formed; the air gap is a gap between the stator and the rotor;

the two axial limiting assemblies are respectively arranged at two ends of the grooves along the axial direction of the rotor so as to limit the movement of the magnetic pole module along the axial direction of the rotor;

a plurality of radial restraining components, for the rotor, the magnetic pole modules and the axial restraining component, at least arranged on the magnetic pole modules to restrain the magnetic pole modules from moving along the radial direction of the rotor; and

a plurality of circumferential restricting members that are provided at intervals in a circumferential direction of the rotor to restrict movement of the magnetic pole modules in the circumferential direction of the rotor;

two adjacent magnetic pole modules in the circumferential direction of the rotor are connected into a combined magnetic pole module through a connecting piece, and two magnetic pole modules in any one combined magnetic pole module are respectively accommodated in two adjacent grooves in the circumferential direction of the rotor;

the two side faces of the combined magnetic pole module are respectively provided with a left side fixing block and a right side fixing block, and the two combined magnetic pole modules are adjacent in the circumferential direction of the rotor and are detachably connected.

In this scheme, the magnetic pole module is held in the recess, is followed the motion of the circumferential direction of rotor by the recess along the circumferential direction restriction piece at rotor circumferential direction's both ends. Along the axial direction of rotor, the recess both ends all are equipped with axial restriction subassembly, restrict the motion of magnetic pole module along the axial direction of rotor through being connected of axial restriction subassembly and magnetic pole module. The radial limiting assembly not only limits the movement of the magnetic pole module along the radial direction of the rotor, but also further limits the movement of the magnetic pole module along the axial direction of the rotor. The groove with the quadrangular section is easy to process, the magnetic pole module is limited to move along each direction of the rotor by the limiting parts, and the matching precision requirement of the magnetic pole module and the groove is reduced. The movement of the magnetic pole modules in the circumferential direction of the rotor is limited by the fact that two of the combined magnetic pole modules are respectively accommodated in two grooves adjacent in the circumferential direction of the rotor, and the movement of the magnetic pole modules in the radial direction of the rotor is limited by the fact that the two combined magnetic pole modules adjacent in the circumferential direction of the rotor are connected.

Preferably, the circumferential restriction comprises a fixing rib.

In this scheme, the fixed muscle restricts the motion of magnetic pole module along the circumference direction of rotor.

Preferably, the fixing rib is integrally formed with the rotor, or the fixing rib is fixedly connected to the rotor by welding or detachably connected to the rotor by a fastener.

In this scheme, fixed muscle can adopt multiple mode to realize being connected with the rotor to the motion of restriction magnetic pole module along rotor circumference direction.

Preferably, the radial restraining assembly comprises:

the first radial connecting hole is arranged in the groove and extends along the radial direction of the rotor;

the second radial connecting holes are formed in the left fixed block and the right fixed block, extend along the thickness direction of the magnetic pole modules, and for two adjacent combined magnetic pole modules along the circumferential direction of the rotor, the second radial connecting holes in the left fixed block of one combined magnetic pole module are overlapped with the second radial connecting holes in the right fixed block of the adjacent combined magnetic pole module and the corresponding first radial connecting holes;

the radial fasteners penetrate through the second radial connecting hole on the left fixed block of one combined magnetic pole module and the second radial connecting hole and the first radial connecting hole on the right fixed block of the adjacent combined magnetic pole module for two adjacent combined magnetic pole modules along the circumferential direction of the rotor;

the thickness direction of the magnetic pole module is parallel to the radial direction of the rotor.

In this scheme, wear to establish two second radial connecting holes through radial fastener and can realize following the connection of the adjacent two joint magnetic pole modules of the circumference direction of rotor, set up first radial connecting hole in the recess in order to strengthen the fixed reliability between magnetic pole module and the rotor. The radial fasteners penetrate through the first radial connecting holes and the two second radial connecting holes to limit the movement of the magnetic pole module along the radial direction of the rotor.

Preferably, for two adjacent combined magnetic pole modules in the circumferential direction of the rotor, the sum of the thicknesses of the left fixed block of one combined magnetic pole module and the right fixed block of the other combined magnetic pole module is less than or equal to the thickness of the magnetic pole module with the smaller thickness in the combined magnetic pole modules.

In the scheme, the thickness sum of the left fixed block of one combined magnetic pole module and the right fixed block of the other combined magnetic pole module is smaller than or equal to the thickness of the magnetic pole module with smaller thickness in the combined magnetic pole modules so as to ensure the reliability of fixation between the magnetic pole modules and the rotor.

Preferably, the radial limiting assembly includes a third mortise and a third tenon, the third mortise and the third tenon extend along the length direction of the magnetic pole module, two adjacent combined magnetic pole modules are arranged along the circumferential direction of the rotor, the left fixed block of one combined magnetic pole module and the right fixed block of the other combined magnetic pole module are arranged in a staggered manner along the length direction of the magnetic pole module, one of the left fixed block and the right fixed block is provided with the third mortise, the other fixed block is provided with the third tenon, and the two adjacent combined magnetic pole modules along the circumferential direction of the rotor are in mortise-tenon connection through the third mortise and the third tenon;

the length direction of the magnetic pole module is parallel to the axial direction of the rotor.

In this scheme, through the third mortise with the mortise-tenon joint of third tenon realizes the connection of two joint magnetic pole modules adjacent along the circumference direction of rotor to restriction magnetic pole module is along the motion of the radial direction of rotor.

Preferably, for two adjacent combined magnetic pole modules in the circumferential direction of the rotor, the sum of the lengths of the left fixed block of one combined magnetic pole module and the right fixed block of the other combined magnetic pole module is less than or equal to the length of the magnetic pole module with the smaller length in the combined magnetic pole modules.

In the scheme, the sum of the lengths of the left fixed block of one combined magnetic pole module and the right fixed block of the other combined magnetic pole module is less than or equal to the length of the magnetic pole module with smaller length in the combined magnetic pole modules so as to ensure the reliability of fixation between the magnetic pole modules and the rotor.

Preferably, the magnetic pole module comprises a base, a shell cover and a permanent magnet, the base and the shell cover enclose a shell, the permanent magnet is located in the shell, and the left side fixing block and the right side fixing block are respectively arranged on the side surface of the shell and are integrally formed with the base;

the length direction of the magnetic pole module is parallel to the axial direction of the rotor, and the thickness direction of the magnetic pole module is parallel to the radial direction of the rotor.

Preferably, a concave part is arranged on one surface of the connecting piece opposite to the circumferential limiting piece, and the concave part is connected with the circumferential limiting piece in a clamping manner.

In this scheme, circumference restriction piece card is gone into in the depressed part, and the connecting piece realizes being connected with circumference restriction piece through the depressed part to the motion of restriction magnetic pole module along the circumferential direction of rotor.

Preferably, the connecting member is integrally formed with the magnetic pole module or fixed on the magnetic pole module through the connecting member.

Preferably, the axial restraining assembly is integrally formed with the rotor.

In this scheme, axial restriction subassembly and rotor integrated into one piece, the process is simple, and the location is accurate.

Preferably, the two axial limiting assemblies are respectively connected to two ends of the rotor, and the section of any one of the axial limiting assemblies along the radial direction of the rotor is annular; or the like, or, alternatively,

two the axial restriction subassembly connect respectively in the both ends of rotor, arbitrary one the axial restriction subassembly includes follows a plurality of axial restriction units that the circumferential direction interval of rotor set up, it is a plurality of the axial restriction unit connect respectively in the both ends of recess, and each the axial restriction unit connect in adjacent two between the circumference restriction piece.

In this embodiment, the axial restraining assembly may be a single unit, or each axial restraining assembly may include a plurality of axial restraining units, which saves space.

The permanent magnet wind driven generator comprises a magnetic pole module and a rotor and is characterized by further comprising a magnetic pole fixing device of the permanent magnet wind driven generator.

The positive progress effects of the invention are as follows: the invention adopts the groove which is easy to process, avoids the processing difficulty caused by other grooves with complicated shapes such as T-shaped, dovetail-shaped and the like, limits the movement of the magnetic pole module along each direction of the rotor by a plurality of limiting parts, and reduces the matching precision requirement of the magnetic pole module and the groove. The invention effectively overcomes the defects of higher groove processing difficulty and higher matching precision requirement of the magnetic pole module and the groove in the prior art. The movement of the magnetic pole modules in the circumferential direction of the rotor is limited by the fact that two of the combined magnetic pole modules are respectively accommodated in two grooves adjacent in the circumferential direction of the rotor, and the movement of the magnetic pole modules in the radial direction of the rotor is limited by the fact that the two combined magnetic pole modules adjacent in the circumferential direction of the rotor are connected.

Drawings

Fig. 1 is a schematic perspective view of a magnetic pole module of embodiment 1 of the present invention mounted on a rotor.

Fig. 2 is a schematic perspective view of a magnetic pole module according to embodiment 1 of the present invention.

Fig. 3 is a schematic perspective view of a magnetic pole module of embodiment 2 of the present invention mounted on a rotor.

Fig. 4 is a schematic perspective view of a magnetic pole module according to embodiment 2 of the present invention.

Fig. 5 is a schematic perspective view of a magnetic pole module of embodiment 3 of the present invention mounted on a rotor.

Fig. 6 is a schematic perspective view of a magnetic pole module according to embodiment 3 of the present invention.

Description of reference numerals:

10 rotor

20 magnetic pole module

201 axle end magnetic pole module

202 combined magnetic pole module

203 outer cover

2031 base

2032 case cover

204 permanent magnet

30 groove

40 axial restraint assembly

401 second hole

402 second tenon

50 radial restraint assembly

501 first mortise

502 first tenon

503 first radial connecting hole

504 second radial connecting hole

506 third hole

507 third tenon

60 circumferential limit

601 fixed rib

70 connecting piece

701 recess part

80 left side fixed block

90 right side fixed block

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Example 1

The embodiment provides a magnetic pole fixing device of a permanent magnet wind driven generator, which is used for fixing a plurality of magnetic pole modules on a rotor of the permanent magnet wind driven generator. As shown in fig. 1-2, the apparatus includes a plurality of recesses 30, a two-axis limiting assembly 40, a plurality of radial limiting assemblies 50, and a plurality of circumferential limiting members 60, and limits the movement of the magnetic pole module 20 along each direction of the rotor 10 by means of the plurality of limiting members, thereby reducing the requirement of matching accuracy between the magnetic pole module 20 and the recesses 30.

The plurality of grooves 30 are provided on a side surface of the rotor 10 adjacent to an air gap, which is a gap between the stator and the rotor 10, and extend toward the inside of the rotor 10. The plurality of grooves 30 are provided at intervals in the circumferential direction of the rotor 10, the cross section of the groove 30 is rectangular, and the groove 30 is formed with an accommodation space for accommodating the magnetic pole module 20. The cross-sectional shape of the groove 30 of the embodiment is not limited to a rectangle, and other quadrilateral shapes which are easy to process can be adopted, so that the processing difficulty caused by grooves 30 with other complex shapes such as a T shape, a dovetail shape and the like is avoided. The grooves 30 are formed by milling grooves on the side surfaces of the rotor 10 adjacent to the air gap, so that two ends of any one groove 30 in the circumferential direction of the rotor 10 are respectively provided with one fixing rib 601, the fixing ribs 601 are arranged at intervals in the circumferential direction of the rotor 10, the length of any one groove 30 in the circumferential direction of the rotor 10 is equal to the width of the magnetic pole module 20, the magnetic pole module 20 is accommodated in the groove 30, and the fixing ribs 601 on the two sides limit the movement of the magnetic pole module 20 in the circumferential direction of the rotor 10.

It should be noted that the circumferential limiting member 60 in the present embodiment is not limited to the fixing rib 601, and other members having a limiting function and sufficient strength may be used. In other alternative embodiments, the recess 30 is not limited to being formed by milling a groove on the side of the rotor 10 adjacent to the air gap, and the fixing rib 106 may be fixedly attached to the rotor 10 by welding or detachably attached to the rotor 10 by a fastener so as to enclose the recess 30.

The radial restricting member 50 serves to restrict the movement of the magnetic pole module 20 in the radial direction of the rotor 10, but the radial restricting member 50 restricts not only the movement of the magnetic pole module 20 in the radial direction of the rotor 10 but also further restricts the movement of the magnetic pole module 20 in the axial direction of the rotor 10. Radial restriction subassembly 50 includes first mortise 501 and first tenon 502, to two magnetic pole modules 20 adjacent along the axial direction of rotor 10 in arbitrary recess 30, the tip of one of them magnetic pole module 20 is equipped with first mortise 501, the tip of another magnetic pole module 20 is equipped with first tenon 502, two magnetic pole modules 20 realize the connection dismantled of two magnetic pole modules 20 adjacent along the axial direction of rotor 10 in arbitrary recess 30 through first mortise 501 and first tenon 502 mortise-tenon connection, thereby also restrict magnetic pole module 20 along the motion of the radial direction of rotor 10, it is more convenient and simple to operate. Both ends of magnetic pole module 20 can be first mortise 501 or first tenon 502 simultaneously in this embodiment, also can a tip be first mortise 501, and another tip is first tenon 502, and what need be noted is that radial restriction subassembly 50 that the relative tip of two adjacent magnetic pole modules 20 of axial direction along rotor 10 adopted needs to be different to can realize the mortise-tenon joint of two adjacent magnetic pole modules 20 of axial direction along rotor 10.

Radial restriction subassembly 50 still includes second mortise hole 401 and second tenon 402, magnetic pole module 20 adjacent with axial restriction subassembly 40 in arbitrary recess 30 is axle head magnetic pole module 201, second mortise hole 401 is established on axial restriction subassembly 40, second tenon 402 is established at the tip of axle head magnetic pole module 201, axial restriction subassembly 40 and axle head magnetic pole module 201 are through second mortise hole 401 and second tenon 402 mortise-tenon joint, rethread is as above-mentioned in the adjacent two magnetic pole modules 20 'of axial direction of rotor 10 mortise-tenon joint, restrict magnetic pole module 20 jointly along the axial direction of rotor 10 and radial direction's motion. The end of the axial limiting component 40 in this embodiment is not limited to be provided with the second mortise 401, but may also be provided with the second tenon 402, and at this time, the shaft end magnetic pole module 201 matched with the second mortise 401 needs to be provided with the second mortise 401.

In the axial direction along the rotor 10, the axial limiting assemblies 40 are integrally formed with the rotor 10, gaps are respectively formed at two ends of the rotor 10 and two ends of the groove 30, and two axial limiting assemblies 40 are formed on side walls at two ends of the rotor 10 to limit the movement of the magnetic pole module 20 along the axial direction of the rotor 10. The axial restraining assembly 40 is directly formed by the side walls of the two ends of the rotor 10, and has simple process and accurate positioning. The axial restraining assemblies 40 of the present embodiment are not limited to being directly formed by the sidewalls at the two ends of the rotor 10, and the axial restraining assemblies 40 may be connected to the rotor 10 to restrain the movement of the magnetic pole module 20 in the axial direction of the rotor 10.

In other alternative embodiments, the movement of the magnetic pole module 20 along the axial direction of the rotor 10 may also be limited by two axial limiting assemblies 40 respectively connected to two ends of the rotor 10, and a cross section of any one axial limiting assembly 40 along the radial direction of the rotor 10 is a ring shape, in which case each axial limiting assembly 40 may be a whole. Alternatively, the two axial limiting assemblies 40 are respectively connected to two ends of the rotor 10, any one of the axial limiting assemblies 40 includes a plurality of axial limiting units arranged at intervals along the circumferential direction of the rotor 10, the plurality of axial limiting units are respectively connected to two ends of the groove 30, and each axial limiting unit is connected between two adjacent circumferential limiting pieces 60, so that the axial limiting assembly 40 is more space-saving.

The embodiment also provides a permanent magnet wind power generator, which comprises a rotor 10, a magnetic pole module 20 and a magnetic pole fixing device of the permanent magnet wind power generator.

Example 2

The structure of the present embodiment is substantially the same as that of embodiment 1, except that the manner of restricting the movement of the magnetic pole module 20 in the circumferential direction of the rotor 10 is different, the length of the groove 30 in the circumferential direction of the rotor 10 is different, and the radial direction restricting member 50 is different.

As shown in fig. 3 to 4, two adjacent magnetic pole modules 20 in the circumferential direction of the rotor 10 are connected by a connecting member 70 to form a combined magnetic pole module 202, two magnetic pole modules 20 in any one combined magnetic pole module 202 are respectively accommodated in two adjacent grooves 30 in the circumferential direction of the rotor 10, and two combined magnetic pole modules 202 adjacent in the circumferential direction of the rotor 10, wherein the magnetic pole module 20 on the left side in one combined magnetic pole module 202 is in the same groove 30 as the magnetic pole module 20 on the right side in the other combined magnetic pole module 202. The opposite surface of the connector 70 and the fixing rib 601 is provided with a recessed part 701, and the recessed part 701 is connected with the fixing rib 601 in a clamping manner to realize the connection of the connector 70 and the fixing rib 601, so that the movement of the magnetic pole module 20 along the circumferential direction of the rotor 10 is limited. The connecting piece 70 and the magnetic pole module 20 are integrally formed, so that the process is simple and the operation is convenient. The connecting member 70 in this embodiment is not limited to be integrally formed with the magnetic pole module 20, and the connecting member 70 may be fixed to the magnetic pole module 20 by using a fixing structure.

The two side surfaces of the combined magnetic pole module 202 are respectively provided with the left fixing block 80 and the right fixing block 90, and the two combined magnetic pole modules 202 adjacent in the circumferential direction of the rotor 10 are detachably connected, thereby restricting the movement of the magnetic pole module 20 in the radial direction of the rotor 10.

The radial limit assembly 50 includes a first radial connection aperture 503, a second radial connection aperture 504, and a radial fastener. The first radial coupling hole 503 is provided in the groove 30 and extends toward the inside of the rotor 10 in the radial direction of the rotor 10. The second radial coupling holes 504 are provided in the left and right fixing blocks 80 and 90, and extend in the thickness direction of the magnetic pole module 20. For two adjacent combined magnetic pole modules 202 along the circumferential direction of the rotor 10, the second radial connecting hole 504 on the left fixed block 80 of one combined magnetic pole module 202 is overlapped with the second radial connecting hole 504 and the corresponding first radial connecting hole 503 on the right fixed block 90 of the adjacent combined magnetic pole module 202, so that the radial fastener can be inserted through the second radial connecting hole 504 on the left fixed block 80 of one combined magnetic pole module 202 and the second radial connecting hole 504 and the first radial connecting hole 503 on the right fixed block 90 of the adjacent combined magnetic pole module 202, thereby realizing the detachable connection of the two adjacent combined magnetic pole modules 202 along the circumferential direction of the rotor 10 and limiting the movement of the magnetic pole module 20 along the radial direction of the rotor 10. The first radial connecting hole 503 is not limited to be provided in the present embodiment, and the first radial connecting hole 503 is provided to ensure the reliability of the fixation between the magnetic pole module 20 and the rotor 10.

For two combined magnetic pole modules 202 adjacent to each other in the circumferential direction of the rotor 10, the sum of the thicknesses of the left fixing block 80 of one combined magnetic pole module 202 and the right fixing block 90 of the other combined magnetic pole module 202 is less than or equal to the thickness of the magnetic pole module 20 with the smaller thickness in the combined magnetic pole modules 202, so that the reliability of the fixation between the magnetic pole module 20 and the rotor 10 is ensured.

The magnetic pole module 20 includes a base 2031, a cover 2032 and a permanent magnet 204, the base 2031 and the cover 2032 enclose a housing 203, the permanent magnet 204 is located in the housing 203, and the left fixing block 80 and the right fixing block 90 are respectively arranged on the side of the housing 203 and are integrally formed with the base 2031. The longitudinal direction of the magnetic pole module 20 is parallel to the axial direction of the rotor 10, and the thickness direction of the magnetic pole module 20 is parallel to the radial direction of the rotor 10.

Example 3

The structure of the present embodiment is substantially the same as that of embodiment 2, except that the left and right fixing blocks are different, and the radial restricting member 50 is different.

As shown in fig. 5 to 6, the radial limiting assembly 50 includes a third mortise 506 and a third tenon 507, the third mortise 506 and the third tenon 507 extend along the length direction of the magnetic pole module 20, two combined magnetic pole modules 202 adjacent to each other along the circumferential direction of the rotor 10, the left fixing block 80 of one combined magnetic pole module 202 and the right fixing block 90 of the other combined magnetic pole module 202 are alternately disposed along the length direction of the magnetic pole module 20, one of the two combined magnetic pole modules is provided with the third mortise 506, the other combined magnetic pole module is provided with the third tenon 507, and the two combined magnetic pole modules 202 adjacent to each other along the circumferential direction of the rotor 10 are in mortise-and-tenon connection through the third mortise 506 and the third tenon 507, so that the detachable connection of the two combined magnetic pole modules 202 adjacent to each other along the circumferential direction of the rotor 10 is realized, and the movement of the magnetic pole modules 20 along the radial direction of the rotor 10 is limited. The left fixing block 80 and the right fixing block 90 of the combined magnetic pole module 202 in this embodiment may be a third mortise 506 or a third tenon 507 at the same time, or may be the third mortise 506 or the third tenon 507, respectively, it should be noted that the radial limiting assemblies 50 adopted by the left fixing block 80 and the right fixing block 90, which are adjacent to each other in the circumferential direction of the rotor 10, of the two combined magnetic pole modules 202 are different, so that the mortise and tenon connection of the two combined magnetic pole modules 202 adjacent to each other in the circumferential direction of the rotor 10 can be realized.

For two combined magnetic pole modules 202 adjacent in the circumferential direction of the rotor 10, the sum of the lengths of the left fixing block 80 of one combined magnetic pole module 202 and the right fixing block 90 of the other combined magnetic pole module 202 is less than or equal to the length of the magnetic pole module 20 with the smaller length in the combined magnetic pole modules 202, so that the reliability of fixation between the magnetic pole module 20 and the rotor 10 is ensured.

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

1. A magnetic pole fixing device of a permanent magnet wind power generator is used for fixing a plurality of magnetic pole modules on a rotor of the permanent magnet wind power generator, and is characterized by comprising the following components:

two adjacent magnetic pole modules in the circumferential direction of the rotor are connected into a combined magnetic pole module through a connecting piece, and two magnetic pole modules in any one combined magnetic pole module are respectively accommodated in two adjacent grooves in the circumferential direction of the rotor.

2. The pole attachment arrangement of a permanent magnet wind turbine as claimed in claim 1, wherein the circumferential limitation comprises attachment ribs.

3. The pole fixing device of a permanent magnet wind power generator according to claim 2, wherein the fixing rib is integrally formed with the rotor, or the fixing rib is fixedly connected to the rotor by welding or detachably connected to the rotor by a fastener.

4. The pole fixing device of a permanent magnet wind power generator according to claim 1, wherein the two side surfaces of the associated pole modules are respectively provided with a left side fixing block and a right side fixing block, and two adjacent associated pole modules in the circumferential direction of the rotor are detachably connected.

5. The pole attachment arrangement of a permanent magnet wind turbine as claimed in claim 4, wherein the radial restraining assembly comprises:

6. The pole fixing device of a permanent magnet wind power generator according to claim 5, wherein, for two of the combined pole modules adjacent in the circumferential direction of the rotor, the sum of the thicknesses of the left fixed block of one of the combined pole modules and the right fixed block of the other combined pole module is less than or equal to the thickness of the pole module having the smaller thickness among the combined pole modules.

7. The magnetic pole fixing device of the permanent magnet wind power generator according to claim 4, wherein the radial limiting component comprises a third mortise and a third tenon, the third mortise and the third tenon extend along the length direction of the magnetic pole module, two adjacent combined magnetic pole modules are arranged along the circumferential direction of the rotor, the left fixed block of one combined magnetic pole module and the right fixed block of the other combined magnetic pole module are staggered along the length direction of the magnetic pole module, one of the left fixed block and the right fixed block is provided with the third mortise, the other fixed block is provided with the third tenon, and the two adjacent combined magnetic pole modules along the circumferential direction of the rotor are mortise-connected through the third mortise and the third tenon;

8. The pole fixing apparatus of a permanent magnet wind power generator according to claim 7, wherein for two of the combined pole modules adjacent in the circumferential direction of the rotor, the sum of the lengths of the left fixed block of one of the combined pole modules and the right fixed block of the other combined pole module is less than or equal to the length of the pole module having the smaller length of the combined pole modules.

9. The magnetic pole fixing device of the permanent magnet wind power generator according to claim 4, wherein the magnetic pole module comprises a base, a cover and a permanent magnet, the base and the cover enclose a housing, the permanent magnet is located in the housing, and the left fixing block and the right fixing block are respectively arranged on the side surface of the housing and are integrally formed with the base;

10. The pole fixing device of a permanent magnet wind power generator according to any one of claims 1 to 9, wherein a surface of the connecting member opposite to the circumferential restriction member is provided with a recess, and the recess is engaged with the circumferential restriction member.

11. The pole fixing device of a permanent magnet wind power generator according to claim 10, wherein the connecting member is integrally formed with the pole module or fixed to the pole module by the connecting member.

12. A pole fixing device of a permanent magnet wind generator according to any of claims 1-9 and 11, characterized in that the axial restraining component is formed integrally with the rotor.

13. The pole fixing device of a permanent magnet wind power generator according to any one of claims 1 to 9 and 11, wherein two axial restraining components are respectively connected to two ends of the rotor, and a cross section of any one of the axial restraining components along a radial direction of the rotor is annular; or the like, or, alternatively,

14. A permanent magnet wind generator comprising a pole module and a rotor, characterized in that the permanent magnet wind generator further comprises a pole fixing device of the permanent magnet wind generator according to any one of claims 1 to 13.