WO2020207227A1 - 永磁风力发电机的磁极固定装置及永磁风力发电机 - Google Patents

永磁风力发电机的磁极固定装置及永磁风力发电机 Download PDF

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Publication number
WO2020207227A1
WO2020207227A1 PCT/CN2020/080370 CN2020080370W WO2020207227A1 WO 2020207227 A1 WO2020207227 A1 WO 2020207227A1 CN 2020080370 W CN2020080370 W CN 2020080370W WO 2020207227 A1 WO2020207227 A1 WO 2020207227A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic pole
rotor
permanent magnet
radial
pole module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/080370
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English (en)
French (fr)
Inventor
吴立建
王海洋
王嗣翔
闻汇
方攸同
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University
Shanghai Electric Wind Power Group Co Ltd
Original Assignee
Zhejiang University
Shanghai Electric Wind Power Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang University, Shanghai Electric Wind Power Group Co Ltd filed Critical Zhejiang University
Publication of WO2020207227A1 publication Critical patent/WO2020207227A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • 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
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791—Surface mounted magnets; Inset magnets
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • 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

Definitions

  • the invention relates to the field of wind power generation, in particular to a magnetic pole fixing device of a permanent magnet wind power generator and a permanent magnet wind power generator.
  • the rotor of a large permanent magnet wind power generator is equipped with multiple permanent magnets, especially rare earth permanent magnets such as neodymium iron boron as its magnetic poles.
  • rare earth permanent magnets such as neodymium iron boron
  • the permanent magnet is easy to fall off the rotor, which will affect the safe and reliable operation of the motor. Therefore, the permanent magnet wind generator rotor magnetic
  • the way the steel is fixed and encapsulated is very critical.
  • a common permanent magnet fixing method is: encapsulating the permanent magnet in a magnetic pole module box, opening a T-shaped groove on the rotor, and implementing the magnetic pole module into a shape that matches the groove. Push the magnetic pole module into the groove on the rotor along the generator axis.
  • the biggest advantage of this method is that the magnetic pole module can be installed after the rotor and stator are assembled, but the T-shaped groove processing cost is higher, and the matching accuracy of the magnetic pole module and the groove is higher.
  • the prior art has the disadvantages that the groove processing is relatively difficult and the matching accuracy of the magnetic pole module and the groove is relatively high.
  • the technical problem to be solved by the present invention is to overcome the disadvantages of high difficulty in groove processing and high requirement on matching precision of magnetic pole module and groove in the prior art, and to provide a magnetic pole fixing device and permanent magnet of a permanent magnet wind generator Wind Turbines.
  • a magnetic pole fixing device of a permanent magnet wind power generator is used to fix a plurality of magnetic pole modules on the 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 includes:
  • a plurality of grooves are provided on the side surface of the rotor adjacent to the air gap and extend toward the inside of the rotor.
  • the plurality of grooves are arranged at intervals along the circumferential direction of the rotor.
  • the cross section of the groove It is a quadrilateral and is formed with an accommodation space for accommodating the magnetic pole module; the air gap is a gap between the stator and the rotor;
  • Two axial restricting components are respectively provided at the two ends of the plurality of grooves along the axial direction of the rotor to restrict the movement of the magnetic pole module along the axial direction of the rotor;
  • a plurality of circumferential restricting members are arranged at intervals along the circumferential direction of the rotor to limit the movement of the magnetic pole module along the circumferential direction of the rotor.
  • the magnetic pole module is accommodated in the groove, and the movement of the magnetic pole module in the circumferential direction of the rotor is restricted by the circumferential restricting members at both ends of the groove in the circumferential direction of the rotor.
  • both ends of the groove are provided with axial restriction components, and the movement of the magnetic pole module in the axial direction of the rotor is restricted by the connection of the axial restriction component and the magnetic pole module.
  • the radial restriction component not only restricts the movement of the magnetic pole module in the radial direction of the rotor, but also further restricts the movement of the magnetic pole module in the axial direction of the rotor.
  • the groove with a quadrilateral cross section is easy to process, and the movement of the magnetic pole module in all directions along the rotor is restricted by multiple restricting parts, which reduces the matching accuracy requirements of the magnetic pole module and the groove.
  • the circumferential restricting member includes a fixing rib.
  • the fixed ribs restrict the movement of the magnetic pole module along the circumferential direction of the rotor.
  • 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.
  • the fixed rib can be connected to the rotor in a variety of ways to limit the movement of the magnetic pole module in the circumferential direction of the rotor.
  • two adjacent magnetic pole modules in any one of the grooves along the axial direction of the rotor are detachably connected.
  • the movement of the magnetic pole module in the radial direction of the rotor is restricted by the connection of two magnetic pole modules adjacent in the axial direction of the rotor, and the movement of the magnetic pole module in the axial direction of the rotor is further restricted.
  • the radial restricting component includes a first 90 hole and a first tenon.
  • the radial restricting component includes a first 90 hole and a first tenon.
  • the first hole For any two of the magnetic pole modules adjacent in the axial direction of the rotor in the groove, one of the The end of the magnetic pole module is provided with the first hole, and the end of the other magnetic pole module is provided with the first tenon.
  • the two magnetic pole modules pass through the first hole and the first hole.
  • a tenon and tenon joint is provided.
  • the detachable connection of the two magnetic pole modules adjacent in the axial direction of the rotor is realized by the tenon and tenon connection of the first mortise hole and the first tenon, and the operation is more convenient and simple.
  • the radial restriction component further includes a second hole and a second tenon
  • the magnetic pole module adjacent to the axial restriction component in any one of the grooves is a shaft end magnetic pole module
  • the end of one of the shaft end magnetic pole module and the axial restricting assembly is provided with the second hole, and the end of the other is provided with the second tenon, the shaft end
  • the magnetic pole module and the axial restriction assembly are connected through the second socket and the second tenon socket.
  • connection between the magnetic pole module and the axial restriction is realized through the tenon and tenon connection of the second mortise hole and the second tenon, and then through the connection of the two adjacent magnetic pole modules in the axial direction of the rotor as described above, Jointly restrict the movement of the magnetic pole module along the axial and radial directions of the rotor.
  • two adjacent magnetic pole modules in the circumferential direction of the rotor are connected to form a combined magnetic pole module by a connecting member, and two of the magnetic pole modules in any one of the combined magnetic pole modules They are respectively accommodated in two adjacent grooves along the circumferential direction of the rotor.
  • the two magnetic pole modules in the combined magnetic pole module are respectively accommodated in two adjacent grooves along the circumferential direction of the rotor to restrict the movement of the magnetic pole modules in the circumferential direction of the rotor.
  • both sides of the combined magnetic pole module are provided with a left side fixed block and a right side fixed block respectively, and two adjacent combined magnetic pole modules are detachably connected in the circumferential direction of the rotor.
  • the movement of the magnetic pole modules in the radial direction of the rotor is restricted by connecting two combined magnetic pole modules adjacent to each other in the circumferential direction of the rotor.
  • the radial restriction component includes:
  • a first radial connecting hole is provided in the groove, and the first radial connecting hole extends along the radial direction of the rotor;
  • the second radial connection hole is provided on the left side fixed block and the right side fixed block.
  • the second radial connection hole extends along the thickness direction of the magnetic pole module.
  • Radial fasteners for the two combined magnetic pole modules adjacent to each other in the circumferential direction of the rotor, the radial fastener penetrates through the left side of one of the combined magnetic pole modules to fix The second radial connection hole on the block and the second radial connection hole and the first radial connection hole on the right fixed block adjacent to the combined magnetic pole module;
  • the thickness direction of the magnetic pole module is parallel to the radial direction of the rotor.
  • the two second radial connection holes can be connected by radial fasteners to connect two adjacent magnetic pole modules in the circumferential direction of the rotor, and the first radial connection is provided in the groove The hole is to strengthen the reliability of the fixation between the magnetic pole module and the rotor.
  • the first radial connection hole and the two second radial connection holes are penetrated by the radial fastener to restrict the movement of the magnetic pole module along the radial direction of the rotor.
  • the left side fixed block of one of the combined magnetic pole modules and the 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 module.
  • the thickness 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 a smaller thickness in the combined magnetic pole module is to ensure the reliability of the fixation between the magnetic pole module and the rotor.
  • the radial restricting component includes a third hole and a third tenon, and the third hole and the third tenon extend along the length of the magnetic pole module and along the circumferential direction of the rotor.
  • the third hole and the third tenon extend along the length of the magnetic pole module and along the circumferential direction of the rotor.
  • the length direction is staggered, and one of the two is provided with the third 90 hole and the other is provided with the third tenon.
  • the two combined magnetic pole modules adjacent to each other in the circumferential direction of the rotor Connect with the third tenon through the third hole;
  • the length direction of the magnetic pole module is parallel to the axial direction of the rotor.
  • connection of the two joint magnetic pole modules adjacent in the circumferential direction of the rotor is realized by the third hole and the tenon-and-mortise connection of the third tenon, thereby restricting the magnetic pole modules from moving in the radial direction of the rotor. movement.
  • the left side fixed block of one of the combined magnetic pole modules and the 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 module.
  • 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 module is to ensure the reliability of the fixation between the magnetic pole module and the rotor.
  • the magnetic pole module includes a base, a shell cover and a permanent magnet, the base and the shell cover form a shell, the permanent magnet is located in the shell, the left side fixed block and the The right fixing blocks are respectively arranged on the sides of the housing 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.
  • a recessed portion is provided on a surface of the connecting member opposite to the circumferential restricting member, and the recessed portion is connected to the circumferential restricting member in a snap-fit manner.
  • the circumferential limiting member is clamped into the recessed portion, and the connecting member is connected to the circumferential limiting member through the recessed portion, thereby restricting the movement of the magnetic pole module along the circumferential direction of the rotor.
  • the connecting piece is integrally formed with the magnetic pole module or fixed on the magnetic pole module by the connecting piece.
  • the axial restriction component and the rotor are integrally formed.
  • the axial restriction component and the rotor are integrally formed, with simple procedures and accurate positioning.
  • the two axial restriction components are respectively connected to the two ends of the rotor, and the cross section of any one of the axial restriction components along the radial direction of the rotor is an annular shape; or,
  • the two axial restriction assemblies are respectively connected to the two ends of the rotor, and any one of the axial restriction assemblies includes a plurality of axial restriction units arranged at intervals along the circumferential direction of the rotor, and a plurality of the axial restriction units Restriction units are respectively connected to both ends of the groove, and each of the axial restriction units is connected between two adjacent circumferential restriction members.
  • the axial restriction assembly may be a whole, or each axial restriction assembly may include a plurality of axial restriction units to save space.
  • a permanent magnet wind power generator includes a magnetic pole module and a rotor, and is characterized in that the permanent magnet wind power generator further includes the magnetic pole fixing device of the permanent magnet wind power generator as described above.
  • the positive progress effect of the present invention is that the present invention adopts easy-to-process grooves, avoids the processing difficulties caused by T-shaped, dovetail-shaped and other complex-shaped grooves, and relies on multiple restricting parts to limit the movement of the magnetic pole module in all directions of the rotor. , Which reduces the matching accuracy requirements of the magnetic pole module and the groove.
  • the invention effectively solves the defects in the prior art that the groove processing difficulty is relatively high and the matching accuracy of the magnetic pole module and the groove is relatively high.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of a magnetic pole module installed on a rotor according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of the three-dimensional structure of the magnetic pole module according to the first embodiment of the present invention.
  • FIG 3 is a schematic diagram of the three-dimensional structure of the magnetic pole module installed on the rotor of Embodiment 2 of the present invention.
  • FIG. 4 is a schematic diagram of a three-dimensional structure of a magnetic pole module according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of the three-dimensional structure of the magnetic pole module installed on the rotor of Embodiment 3 of the present invention.
  • FIG. 6 is a schematic diagram of a three-dimensional structure of a magnetic pole module according to Embodiment 3 of the present invention.
  • This embodiment provides a magnetic pole fixing device of a permanent magnet wind power generator, which is used to fix a plurality of magnetic pole modules on the rotor of the permanent magnet wind power generator.
  • the device includes a plurality of grooves 30, a two-axis limiting component 40, a plurality of radial limiting components 50 and a plurality of circumferential limiting members 60, and the magnetic pole module 20 is restricted by the plurality of limiting members. Movement in all directions along the rotor 10 reduces the matching accuracy requirements of the magnetic pole module 20 and the groove 30.
  • a plurality of grooves 30 are provided on the side surface of the rotor 10 adjacent to the air gap and extend toward the inside of the rotor 10.
  • the air gap is the gap between the stator and the rotor 10.
  • a plurality of grooves 30 are arranged at intervals along the circumferential direction of the rotor 10, the cross section of the groove 30 is rectangular, and the groove 30 forms an accommodation space for accommodating the magnetic pole module 20.
  • the cross-sectional shape of the groove 30 in this embodiment is not limited to a rectangle, and other quadrilateral shapes that are easy to be processed can also be used to avoid processing difficulties caused by other complex shapes of grooves 30 such as T-shaped and dovetail shapes.
  • the groove 30 is formed by milling grooves on the side surface of the rotor 10 adjacent to the air gap, so that any groove 30 is formed with a fixed rib 601 at both ends along the circumferential direction of the rotor 10.
  • the length of any groove 30 along 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.
  • the fixed ribs 601 on both sides limit the magnetic pole module 20. Movement in the circumferential direction of the rotor 10.
  • the circumferential restricting member 60 in this embodiment is not limited to the fixed rib 601, and other elements with restrictive functions and sufficient strength can be used.
  • the groove 30 is not limited to being formed by milling grooves on the side surface of the rotor 10 adjacent to the air gap, and the fixing rib 106 may also be fixedly connected to by welding or detachably connected to by a fastener. The rotor 10 thus encloses a groove 30.
  • the radial restricting assembly 50 is used to restrict the movement of the magnetic pole module 20 in the radial direction of the rotor 10, but the radial restricting assembly 50 not only restricts the movement of the magnetic pole module 20 in the radial direction of the rotor 10, but also further restricts The magnetic pole module 20 moves along the axial direction of the rotor 10.
  • the radial restricting assembly 50 includes a first hole 501 and a first tenon 502. For two magnetic pole modules 20 adjacent to each other in the axial direction of the rotor 10 in any groove 30, the end of one of the magnetic pole modules 20 is provided There is a first socket 501. The end of the other magnetic pole module 20 is provided with a first tenon 502.
  • the two magnetic pole modules 20 are connected by the first socket 501 and the first tenon 502 to realize the inside of any groove 30
  • the detachable connection of the two magnetic pole modules 20 adjacent in the axial direction of the rotor 10 also restricts the movement of the magnetic pole modules 20 in the radial direction of the rotor 10, and the operation is more convenient and simple.
  • the two ends of the magnetic pole module 20 can be the first socket 501 or the first tenon 502 at the same time, or one end can be the first socket 501 and the other end is the first tenon 502.
  • the radial restriction component 50 further includes a second ⁇ hole 401 and a second tenon 402.
  • the magnetic pole module 20 adjacent to the axial restriction component 40 in any groove 30 is the shaft end magnetic pole module 201, and the second ⁇ hole 401
  • the second tenon 402 is set on the end of the shaft end magnetic pole module 201, and the axial restraining component 40 and the shaft end magnetic pole module 201 pass through the second hole 401 and the second tenon 402.
  • the connection is then connected by the tenon-and-mortise connection of the two magnetic pole modules 20 adjacent to each other in the axial direction of the rotor 10 as described above to jointly limit the movement of the magnetic pole modules 20 in the axial and radial directions of the rotor 10.
  • the end of the axial restricting component 40 in this embodiment is not limited to being provided with a second hole 401, and may also be provided with a second tenon 402.
  • the shaft end magnetic pole module 201 that is matched with it needs to be provided with a second ⁇ 401.
  • the axial restraint assembly 40 is integrally formed with the rotor 10, the two ends of the rotor 10 and the two ends of the groove 30 are respectively formed with gaps, and the side walls at both ends of the rotor 10 form two axial restraints.
  • the component 40 restricts the movement of the magnetic pole module 20 along the axial direction of the rotor 10.
  • the axial restraint assembly 40 is directly formed by the side walls at both ends of the rotor 10, and the process is simple and the positioning is accurate.
  • the axial restriction assembly 40 of this embodiment is not limited to being directly formed by the side walls at both ends of the rotor 10, and the axial restriction assembly 40 can also be connected to the rotor 10 to restrict the movement of the magnetic pole module 20 along the axial direction of the rotor 10.
  • the movement of the magnetic pole module 20 along the axial direction of the rotor 10 can also be restricted by connecting two axial restricting components 40 to both ends of the rotor 10, and any one of the axial restricting components 40
  • the cross section of the rotor 10 in the radial direction is an annular shape.
  • each axial restricting component 40 may be a whole.
  • two axial restriction assemblies 40 are respectively connected to both ends of the rotor 10, and any one of the axial restriction assemblies 40 includes a plurality of axial restriction units arranged at intervals along the circumferential direction of the rotor 10, and the plurality of axial restriction units are respectively connected At both ends of the groove 30, and each axial limiting unit is connected between two adjacent circumferential limiting members 60, the axial limiting component 40 saves more space.
  • the permanent magnet wind power generator includes a rotor 10, a magnetic pole module 20, and the above-mentioned magnetic pole fixing device of the permanent magnet wind power generator.
  • the structure of this embodiment is basically the same as that of the first embodiment. The difference is that the magnetic pole module 20 restricts movement in the circumferential direction of the rotor 10 in a different manner, the groove 30 has a different length in the circumferential direction of the rotor 10, and the radial The restriction component 50 is different.
  • 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.
  • the two magnetic pole modules in any one combined magnetic pole module 202 The group 20 is respectively accommodated in two grooves 30 adjacent to each other in the circumferential direction of the rotor 10.
  • the magnetic pole module 20 and the magnetic pole module 20 on the right side of the other combined magnetic pole module 202 are in the same groove 30.
  • a concave portion 701 is provided on the surface of the connecting member 70 opposite to the fixing rib 601.
  • the concave portion 701 is engaged with the fixing rib 601 to realize the connection between the connecting member 70 and the fixing rib 601, thereby restricting the magnetic pole module 20 along the rotor 10 Movement in the circumferential direction.
  • the connecting piece 70 and the magnetic pole module 20 are integrally formed, the process is simple, and the operation is convenient.
  • the connecting member 70 in this embodiment is not limited to being integrally formed with the magnetic pole module 20, and the connecting member 70 may be fixed on the magnetic pole module 20 by adopting a fixing structure.
  • the two sides of the combined magnetic pole module 202 are respectively provided with a left side fixed block 80 and a right side fixed block 90.
  • Two adjacent combined magnetic pole modules 202 in the circumferential direction of the rotor 10 can be detachably connected to limit the magnetic pole modules 20 Movement in the radial direction of the rotor 10.
  • the radial restriction assembly 50 includes a first radial connection hole 503, a second radial connection hole 504, and a radial fastener.
  • the first radial connection hole 503 is provided in the groove 30 and extends toward the inside of the rotor 10 along the radial direction of the rotor 10.
  • the second radial connection hole 504 is provided on the left fixed block 80 and the right fixed block 90 and extends along the thickness direction of the magnetic pole module 20.
  • the second radial connection hole 504 on the left side fixing block 80 of one combined magnetic pole module 202 is connected to the right of the adjacent combined magnetic pole module 202
  • the second radial connecting hole 504 on the side fixing block 90 overlaps with the corresponding first radial connecting hole 503, so that the radial fastener can pass through the fixing block 80 on the left side of one of the combined magnetic pole modules 202
  • the second radial connecting hole 504 and the second radial connecting hole 504 and the first radial connecting hole 503 on the right side fixing block 90 of the adjacent combined magnetic pole module 202 are adjacent to each other in the circumferential direction of the rotor 10
  • the detachable connection of the two combined magnetic pole modules 202 limits the movement of the magnetic pole modules 20 along the radial direction of the rotor 10. In this embodiment, it is not limited to provide the first radial connection hole 503, which is to ensure the reliability of the fixation between the magnetic pole module 20 and
  • the sum of the thickness of the left fixed block 80 of one combined magnetic pole module 202 and the right fixed 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 a smaller thickness in the combined magnetic pole module 202, so as to ensure the reliability of the fixation between the magnetic pole module 20 and the rotor 10.
  • 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.
  • the left fixed block 80 and the right fixed block 90 are respectively arranged in The side surface of the housing 203 is integrally formed with the base 2031.
  • the length 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.
  • the structure of this embodiment is basically the same as that of the second embodiment. The difference is that the left side fixed block and the right side fixed block are different, and the radial restricting assembly 50 is different.
  • the radial restricting assembly 50 includes a third 90 hole 506 and a third tenon 507.
  • the third 90 hole 506 and the third tenon 507 extend along the length of the magnetic pole module 20 and along the circumference of the rotor 10.
  • the left fixed block 80 of one combined magnetic pole module 202 and the right fixed block 90 of the other combined magnetic pole module 202 are staggered along the length of the magnetic pole module 20.
  • one of the two is provided with a third 90 hole 506, and the other is provided with a third tenon 507.
  • the two combined magnetic pole modules 202 adjacent to each other in the circumferential direction of the rotor 10 pass through the third hole 506 and the third hole.
  • the tenon and tenon joints 507 are connected to realize the detachable connection of the two combined magnetic pole modules 202 adjacent in the circumferential direction of the rotor 10 and restrict the movement of the magnetic pole modules 20 in the radial direction of the rotor 10.
  • the left side fixing block 80 and the right side fixing block 90 of the combined magnetic pole module 202 in this embodiment can be the third hole 506 or the third tenon 507 at the same time, or can be the third hole 506 and the third tenon 507 respectively It should be noted that the left fixed block 80 and the right fixed block 90 opposite to the two combined magnetic pole modules 202 adjacent to each other in the circumferential direction of the rotor 10 need to use different radial restricting components 50, so as to achieve the The tenon-and-mortise joints of two adjacent combined magnetic pole modules 202 in the circumferential direction are connected.
  • the sum of the lengths of the left fixed block 80 of one combined magnetic pole module 202 and the right fixed 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 a smaller length in the combined magnetic pole module 202, so as to ensure the reliability of the fixation between the magnetic pole module 20 and the rotor 10.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

本发明公开了一种永磁风力发电机的磁极固定装置及永磁风力发电机，永磁风力发电机的磁极固定装置包括多个凹槽、两轴向限制组件、多个径向限制组件和多个周向限制件。多个凹槽沿转子的周向方向间隔设置，凹槽的截面为四边形，且形成有用于容纳磁极模组的容纳空间；两轴向限制组件分别设于多个凹槽沿转子的轴向方向的两端，以限制磁极模组沿转子的轴向方向的运动；径向限制组件用于限制磁极模组沿转子的径向方向的运动；多个周向限制件分别设于多个凹槽沿转子的周向方向的两端，以限制磁极模组沿转子的周向方向的运动。本发明有效解决了现有技术中凹槽加工难度较高、磁极模组与凹槽匹配精度要求较高的缺陷。

Description

永磁风力发电机的磁极固定装置及永磁风力发电机
本申请要求申请日为2019年4月11日的中国专利申请CN201910288954.X的优先权。本申请引用上述中国专利申请的全文。
技术领域
本发明涉及风力发电领域，特别涉及一种永磁风力发电机的磁极固定装置及永磁风力发电机。
背景技术
大型永磁风力发电机转子安装多块永磁体、特别是钕铁硼等稀土永磁体作为其磁极。发电机运行时，受工作环境中温度、潮湿、振动、交变电磁力等各种因素的影响，永磁体容易从转子脱落，给电机安全可靠运行造成影响，因此，永磁风力发电机转子磁钢的固定和封装方式非常关键。
目前，一种常见的永磁体固定方法为：将永磁体封装在磁极模组盒中，在转子上开设T字形的凹槽，并将磁极模组实施成与凹槽相匹配的形状，安装时将磁极模组沿发电机轴向推入安装至转子上的凹槽内。这种方法最大的好处是磁极模组可以在转子和定子装配后再进行安装，但是T字形凹槽加工成本较高，并且对于磁极模组和凹槽的匹配精度要求较高。
综上，现有技术中存在凹槽加工难度较高、磁极模组与凹槽匹配精度要求较高的缺陷。
发明内容
本发明要解决的技术问题是为了克服现有技术中凹槽加工难度较高、磁极模组与凹槽匹配精度要求较高的缺陷，提供一种永磁风力发电机的磁极固定装置及永磁风力发电机。
本发明是通过下述技术方案来解决上述技术问题：
一种永磁风力发电机的磁极固定装置，用于将多个磁极模组固定在所述永磁风力发电机的转子上，其特点在于，所述永磁风力发电机的磁极固定装置包括：
多个凹槽，设于所述转子与气隙相邻的侧面上并朝所述转子的内部延伸，多个所述凹槽沿所述转子的周向方向间隔设置，所述凹槽的截面为四边形，且形成有用于容纳所述磁极模组的容纳空间；所述气隙为定子与所述转子间的空隙；
两轴向限制组件，分别设于多个所述凹槽沿所述转子的轴向方向的两端，以限制所述磁极模组沿所述转子的轴向方向的运动；
多个径向限制组件，对于所述转子、所述磁极模组和所述轴向限制组件，多个所述径向限制组件至少设于所述磁极模组上，以限制所述磁极模组沿所述转子的径向方向的运动；以及
多个周向限制件，沿所述转子的周向方向间隔设置，以限制所述磁极模组沿所述转子的周向方向的运动。
在本方案中，磁极模组容纳于凹槽内，由凹槽沿转子周向方向的两端的周向限制件限制磁极模组沿转子的周向方向的运动。沿转子的轴向方向，凹槽两端均设有轴向限制组件，通过轴向限制组件与磁极模组的连接来限制磁极模组沿转子的轴向方向的运动。径向限制组件不仅限制了磁极模组沿转子的径向方向的运动，也进一步限制了磁极模组沿转子的轴向方向的运动。截面为四边形的凹槽易于加工，依靠多个限制件限制磁极模组沿转子各个方向的运动，降低了磁极模组与凹槽的匹配精度要求。
较佳地，所述周向限制件包括固定筋。
在本方案中，固定筋限制磁极模组沿转子的周向方向的运动。
较佳地，所述固定筋与所述转子一体成型，或，所述固定筋通过焊接固定连接于或通过紧固件可拆卸连接于所述转子。
在本方案中，固定筋可采用多种方式实现与转子的连接，以限制磁极模组沿转子周向方向的运动。
较佳地，任意一所述凹槽内沿所述转子的轴向方向相邻的两所述磁极模组可拆卸连 接。
在本方案中，通过沿转子的轴向方向相邻的两磁极模组的连接来限制磁极模组沿转子的径向方向的运动，也进一步限制磁极模组沿转子的轴向方向的运动。
较佳地，所述径向限制组件包括第一卯孔和第一榫头，对于任意一所述凹槽内沿所述转子的轴向方向相邻的两所述磁极模组，其中一所述磁极模组的端部设有所述第一卯孔，另一所述磁极模组的端部设有所述第一榫头，两所述磁极模组通过所述第一卯孔和所述第一榫头榫卯连接。
在本方案中，通过第一卯孔和第一榫头的榫卯连接实现沿转子的轴向方向相邻的两磁极模组的可拆卸连接，操作更方便简单。
较佳地，所述径向限制组件还包括第二卯孔和第二榫头，任意一所述凹槽内与所述轴向限制组件相邻的所述磁极模组为轴端磁极模组，所述轴端磁极模组与所述轴向限制组件这两者中的其中一个的端部设有所述第二卯孔、另一个的端部设有所述第二榫头，所述轴端磁极模组和所述轴向限制组件通过所述第二卯孔和所述第二榫头榫卯连接。
在本方案中，通过第二卯孔和第二榫头的榫卯连接实现磁极模组与轴向限制的连接，再通过如上述中沿转子的轴向方向相邻的两磁极模组的连接，共同限制磁极模组沿转子的轴向方向和径向方向的运动。
较佳地，在沿所述转子的周向方向上相邻的两所述磁极模组通过一连接件连接成一联合磁极模组，任意一所述联合磁极模组中的两所述磁极模组分别容纳于沿所述转子的周向方向相邻的两所述凹槽内。
在本方案中，通过联合磁极模组中的两磁极模组分别容纳于沿转子的周向方向相邻的两凹槽内来限制磁极模组沿转子的周向方向的运动。
较佳地，所述联合磁极模组的两侧面分别设有左侧固定块和右侧固定块，在沿所述转子的周向方向上相邻的两所述联合磁极模组可拆卸连接。
在本方案中，通过沿转子的周向方向相邻的两联合磁极模组连接来限制磁极模组沿转子的径向方向的运动。
较佳地，所述径向限制组件包括：
第一径向连接孔，设于所述凹槽内，所述第一径向连接孔沿所述转子的径向方向延伸；
第二径向连接孔，设于所述左侧固定块和所述右侧固定块，所述第二径向连接孔沿所述磁极模组的厚度方向延伸，对于沿所述转子的周向方向相邻的两所述联合磁极模组，其中一所述联合磁极模组的所述左侧固定块上的所述第二径向连接孔与相邻所述联合磁极模组的所述右侧固定块上的所述第二径向连接孔及相应的第一径向连接孔重合；
径向紧固件，对于沿所述转子的周向方向相邻的两所述联合磁极模组，所述径向紧固件穿设于其中一所述联合磁极模组的所述左侧固定块上的所述第二径向连接孔以及相邻所述联合磁极模组的所述右侧固定块上的所述第二径向连接孔及第一径向连接孔；
其中，所述磁极模组的厚度方向平行于所述转子的径向方向。
在本方案中，通过径向紧固件穿设两第二径向连接孔即可实现沿转子的周向方向相邻的两联合磁极模组的连接，在凹槽内开设第一径向连接孔是为了加强磁极模组与转子之间固定的可靠性。通过径向紧固件穿设第一径向连接孔和两第二径向连接孔来限制磁极模组沿转子的径向方向的运动。
较佳地，对于沿所述转子的周向方向相邻的两所述联合磁极模组，其中一所述联合磁极模组的所述左侧固定块和另一所述联合磁极模组的所述右侧固定块的厚度之和小于或等于所述联合磁极模组中厚度较小的所述磁极模组的厚度。
在本方案中，沿转子的周向方向相邻的两联合磁极模组，其中一联合磁极模组的左侧固定块和另一联合磁极模组的右侧固定块的厚度之和小于或等于联合磁极模组中厚度较小的所述磁极模组的厚度是为了保证磁极模组与转子之间固定的可靠性。
较佳地，所述径向限制组件包括第三卯孔和第三榫头，所述第三卯孔与所述第三榫头沿所述磁极模组的长度方向延伸，沿所述转子的周向方向相邻的两所述联合磁极模组，其中一所述联合磁极模组的所述左侧固定块和另一所述联合磁极模组的所述右侧固定块沿所述磁极模组的长度方向交错设置，且这两者中的其中一个设有所述第三卯孔、另一个设有所述第三榫头，沿所述转子的周向方向相邻的两所述联合磁极模组通过所述第三卯孔和所述第三榫头榫卯连接；
其中，所述磁极模组的长度方向与所述转子的轴向方向平行。
在本方案中，通过第三卯孔和所述第三榫头的榫卯连接实现沿转子的周向方向相邻的两联合磁极模组的连接，从而限制磁极模组沿转子的径向方向的运动。
较佳地，对于沿所述转子的周向方向相邻的两所述联合磁极模组，其中一所述联合磁极模组的所述左侧固定块和另一所述联合磁极模组的所述右侧固定块的长度之和小于或等于所述联合磁极模组中长度较小的所述磁极模组的长度。
在本方案中，沿转子的周向方向相邻的两联合磁极模组，其中一联合磁极模组的左侧固定块和另一联合磁极模组的右侧固定块的长度之和小于或等于联合磁极模组中长度较小的所述磁极模组的长度是为了保证磁极模组与转子之间固定的可靠性。
较佳地，所述磁极模组包括底座、壳盖和永磁体，所述底座和所述壳盖围成一外壳，所述永磁体位于所述外壳内，所述左侧固定块和所述右侧固定块分别设于所述外壳的侧面，并与所述底座一体成型；
所述磁极模组的长度方向与所述转子的轴向方向平行，所述磁极模组的厚度方向平行于所述转子的径向方向。
较佳地，所述连接件与所述周向限制件相对的一面上设有凹陷部，所述凹陷部与所述周向限制件卡合连接。
在本方案中，周向限制件卡入凹陷部内，连接件通过凹陷部来实现与周向限制件的连接，从而限制磁极模组沿转子的周向方向的运动。
较佳地，所述连接件与所述磁极模组一体成型或通过所述连接件固定在所述磁极模组上。
较佳地，所述轴向限制组件与所述转子一体成型。
在本方案中，轴向限制组件与转子一体成型，工序简单，定位精确。
较佳地，两所述轴向限制组件分别连接于所述转子的两端，任意一所述轴向限制组件沿所述转子的径向方向的截面为一环形；或，
两所述轴向限制组件分别连接于所述转子的两端，任意一所述轴向限制组件包括沿所述转子的周向方向间隔设置的多个轴向限制单元，多个所述轴向限制单元分别连接于 所述凹槽的两端，且每一所述轴向限制单元连接于相邻的两所述周向限制件之间。
在本方案中，轴向限制组件可为一个整体，或每个轴向限制组件可包括多个轴向限制单元，节省空间。
一种永磁风力发电机，包括磁极模组和转子，其特点在于，所述永磁风力发电机还包括如上述的永磁风力发电机的磁极固定装置。
本发明的积极进步效果在于：本发明采用易于加工的凹槽，避免了T字形、燕尾形等其他复杂形状凹槽造成的加工难度，依靠多个限制件限制磁极模组沿转子各个方向的运动，降低了磁极模组与凹槽的匹配精度要求。本发明有效解决了现有技术中凹槽加工难度较高、磁极模组与凹槽匹配精度要求较高的缺陷。
附图说明
图1为本发明实施例1的磁极模组在转子上安装的立体结构示意图。
图2为本发明实施例1的磁极模组的立体结构示意图。
图3为本发明实施例2的磁极模组在转子上安装的立体结构示意图。
图4为本发明实施例2的磁极模组的立体结构示意图。
图5为本发明实施例3的磁极模组在转子上安装的立体结构示意图。
图6为本发明实施例3的磁极模组的立体结构示意图。
附图标记说明：
10转子
20磁极模组
201轴端磁极模组
202联合磁极模组
203外壳
2031底座
2032壳盖
204永磁体
30凹槽
40轴向限制组件
401第二卯孔
402第二榫头
50径向限制组件
501第一卯孔
502第一榫头
503第一径向连接孔
504第二径向连接孔
506第三卯孔
507第三榫头
60周向限制件
601固定筋
70连接件
701凹陷部
80左侧固定块
90右侧固定块
具体实施方式
下面通过实施例的方式进一步说明本发明，但并不因此将本发明限制在所述的实施例范围之中。
实施例1
本实施例提供一种永磁风力发电机的磁极固定装置，用于将多个磁极模组固定在永磁风力发电机的转子上。如图1-2所示，该装置包括多个凹槽30、两轴向限制组件40、多个径向限制组件50和多个周向限制件60，依靠多个限制件限制磁极模组20沿转子10 各个方向的运动，降低了磁极模组20与凹槽30的匹配精度要求。
多个凹槽30设于转子10与气隙相邻的侧面上并朝转子10的内部延伸，气隙为定子与转子10间的空隙。多个凹槽30沿转子10的周向方向间隔设置，凹槽30的截面为矩形，凹槽30形成有用于容纳磁极模组20的容纳空间。本实施例的凹槽30截面形状不局限于矩形，也可采用其他易于加工的四边形形状，避免了T字形、燕尾形等其他复杂形状凹槽30造成的加工难度。凹槽30通过在转子10与气隙相邻的侧面上铣槽形成，从而任意一凹槽30沿转子10的周向方向的两端各形成有一条固定筋601，固定筋601沿转子10的周向方向间隔设置，任意一凹槽30沿转子10的周向方向的长度等于磁极模组20的宽度，磁极模组20容纳于凹槽30内，两侧固定筋601限制了磁极模组20沿转子10的周向方向的运动。
其中，需要说明的是，本实施例中的周向限制件60不局限于固定筋601，可采用其他具有限制功能且强度足够的元件。在其他可替代的实施方式中，凹槽30不局限于通过在转子10与气隙相邻的侧面上铣槽形成，固定筋106也可通过焊接固定连接于或通过紧固件可拆卸连接于转子10，从而围成凹槽30。
径向限制组件50是用于限制磁极模组20沿转子10的径向方向的运动，但径向限制组件50不仅限制了磁极模组20沿转子10的径向方向的运动，也进一步限制了磁极模组20沿转子10的轴向方向的运动。径向限制组件50包括第一卯孔501和第一榫头502，对于任意一凹槽30内沿转子10的轴向方向相邻的两磁极模组20，其中一磁极模组20的端部设有第一卯孔501，另一磁极模组20的端部设有第一榫头502，两磁极模组20通过第一卯孔501和第一榫头502榫卯连接来实现任意一凹槽30内沿转子10的轴向方向相邻的两磁极模组20的可拆卸连接，从而也限制磁极模组20沿转子10的径向方向的运动，操作更方便简单。本实施例中磁极模组20的两端部可同时为第一卯孔501或第一榫头502，也可一端部为第一卯孔501，另一端部为第一榫头502，需要注意的是沿转子10的轴向方向相邻的两磁极模组20相对的端部采用的径向限制组件50需要不同，从而能够实现沿转子10的轴向方向相邻的两磁极模组20的榫卯连接。
径向限制组件50还包括第二卯孔401和第二榫头402，任意一凹槽30内与轴向限 制组件40相邻的磁极模组20为轴端磁极模组201，第二卯孔401设在轴向限制组件40上，第二榫头402设在轴端磁极模组201的端部，轴向限制组件40和轴端磁极模组201通过第二卯孔401和第二榫头402榫卯连接，再通过如上述中沿转子10的轴向方向相邻的两磁极模组20的榫卯连接，共同限制磁极模组20沿转子10的轴向方向和径向方向的运动。本实施例中的轴向限制组件40的端部不局限于设有第二卯孔401，也可设有第二榫头402，此时与之配合的轴端磁极模组201需设有第二卯孔401。
在沿转子10的轴向方向上，轴向限制组件40与转子10一体成型，转子10的两端与凹槽30的两端分别形成有间隙，转子10的两端的侧壁形成两轴向限制组件40，以限制磁极模组20沿转子10的轴向方向的运动。轴向限制组件40由转子10两端的侧壁直接形成，工序简单，定位精确。本实施例的轴向限制组件40不局限于由转子10两端的侧壁直接形成，也可由轴向限制组件40连接于转子10来实现限制磁极模组20沿转子10的轴向方向的运动。
在其他可替代的实施方式中，还可通过两轴向限制组件40分别连接于转子10的两端来限制磁极模组20沿转子10的轴向方向的运动，任意一轴向限制组件40沿转子10的径向方向的截面为一环形，此时每个轴向限制组件40可为一个整体。或者，两轴向限制组件40分别连接于转子10的两端，任意一轴向限制组件40包括沿转子10的周向方向间隔设置的多个轴向限制单元，多个轴向限制单元分别连接于凹槽30的两端，且每一轴向限制单元连接于相邻的两周向限制件60之间，这种轴向限制组件40更加节省空间。
本实施例还提供一种永磁风力发电机，该永磁风力发电机包括转子10、磁极模组20和上述永磁风力发电机的磁极固定装置。
实施例2
本实施例的结构与实施例1基本相同，其不同之处在于磁极模组20沿转子10周向方向的限制运动的方式不同、凹槽30沿转子10的周向方向的长度不同、径向限制组件50不同。
如图3-4所示，在沿转子10的周向方向上相邻的两磁极模组20通过一连接件70连接成一联合磁极模组202，任意一联合磁极模组202中的两磁极模组20分别容纳于沿转 子10的周向方向相邻的两凹槽30内，沿转子10的周向方向相邻的两联合磁极模组202，其中一联合磁极模组202中的左侧的磁极模组20与另一联合磁极模组202中的右侧的磁极模组20在同一凹槽30内。连接件70与固定筋601相对的一面上设有凹陷部701，通过凹陷部701与固定筋601卡合连接以实现连接件70与固定筋601的连接，从而限制磁极模组20沿转子10的周向方向的运动。连接件70与磁极模组20一体成型，工序简单，操作方便。本实施例中的连接件70不局限于与磁极模组20一体成型，也可通过采用固定结构使连接件70固定在磁极模组20上。
联合磁极模组202的两侧面分别设有左侧固定块80和右侧固定块90，在沿转子10的周向方向上相邻的两联合磁极模组202可拆卸连接，从而限制磁极模组20沿转子10的径向方向的运动。
径向限制组件50包括第一径向连接孔503、第二径向连接孔504和径向紧固件。第一径向连接孔503设于凹槽30内，且沿转子10的径向方向向转子10的内部延伸。第二径向连接孔504设于左侧固定块80和右侧固定块90，且沿磁极模组20的厚度方向延伸。对于沿转子10的周向方向相邻的两联合磁极模组202，其中一联合磁极模组202的左侧固定块80上的第二径向连接孔504与相邻联合磁极模组202的右侧固定块90上的第二径向连接孔504及相应的第一径向连接孔503重合，以使径向紧固件能够穿设其中一联合磁极模组202的左侧固定块80上的第二径向连接孔504以及相邻联合磁极模组202的右侧固定块90上的第二径向连接孔504及第一径向连接孔503，从而实现沿转子10的周向方向相邻的两联合磁极模组202的可拆卸连接，限制了磁极模组20沿转子10的径向方向的运动。本实施例中不局限于设置第一径向连接孔503，第一径向连接孔503为了保证磁极模组20与转子10之间固定的可靠性。
对于沿转子10的周向方向相邻的两联合磁极模组202，其中一联合磁极模组202的左侧固定块80和另一联合磁极模组202的右侧固定块90的厚度之和小于或等于联合磁极模组202中厚度较小的磁极模组20的厚度，以此保证磁极模组20与转子10之间固定的可靠性。
磁极模组20包括底座2031、壳盖2032和永磁体204，底座2031和壳盖2032围成 一外壳203，永磁体204位于外壳203内，左侧固定块80和右侧固定块90分别设于外壳203的侧面，并与底座2031一体成型。磁极模组20的长度方向与转子10的轴向方向平行，磁极模组20的厚度方向平行于转子10的径向方向。
实施例3
本实施例的结构与实施例2基本相同，其不同之处在于左侧固定块和右侧固定块不同、径向限制组件50不同。
如图5-6所示，径向限制组件50包括第三卯孔506和第三榫头507，第三卯孔506与第三榫头507沿磁极模组20的长度方向延伸，沿转子10的周向方向相邻的两联合磁极模组202，其中一联合磁极模组202的左侧固定块80和另一联合磁极模组202的右侧固定块90沿磁极模组20的长度方向交错设置，且这两者中的其中一个设有第三卯孔506、另一个设有第三榫头507，沿转子10的周向方向相邻的两联合磁极模组202通过第三卯孔506和第三榫头507榫卯连接，从而实现沿转子10的周向方向相邻的两联合磁极模组202的可拆卸连接，限制了磁极模组20沿转子10的径向方向的运动。本实施例中的联合磁极模组202的左侧固定块80和右侧固定块90可同时为第三卯孔506或第三榫头507，也可分别为第三卯孔506和第三榫头507，需要注意是沿转子10的周向方向相邻的两联合磁极模组202相对的左侧固定块80和右侧固定块90采用的径向限制组件50需要不同，从而能够实现沿转子10的周向方向相邻的两联合磁极模组202的榫卯连接。
对于沿转子10的周向方向相邻的两联合磁极模组202，其中一联合磁极模组202的左侧固定块80和另一联合磁极模组202的右侧固定块90的长度之和小于或等于联合磁极模组202中长度较小的磁极模组20的长度，以此保证磁极模组20与转子10之间固定的可靠性。
虽然以上描述了本发明的具体实施方式，但是本领域的技术人员应当理解，这些仅是举例说明，在不背离本发明的原理和实质的前提下，可以对这些实施方式做出多种变更或修改。因此，本发明的保护范围由所附权利要求书限定。

Claims (18)

  1. 一种永磁风力发电机的磁极固定装置，用于将多个磁极模组固定在所述永磁风力发电机的转子上，其特征在于，所述永磁风力发电机的磁极固定装置包括：
    多个凹槽，设于所述转子与气隙相邻的侧面上并朝所述转子的内部延伸，多个所述凹槽沿所述转子的周向方向间隔设置，所述凹槽的截面为四边形，且形成有用于容纳所述磁极模组的容纳空间；所述气隙为定子与所述转子间的空隙；
    两轴向限制组件，分别设于多个所述凹槽沿所述转子的轴向方向的两端，以限制所述磁极模组沿所述转子的轴向方向的运动；
    多个径向限制组件，对于所述转子、所述磁极模组和所述轴向限制组件，多个所述径向限制组件至少设于所述磁极模组上，以限制所述磁极模组沿所述转子的径向方向的运动；以及
    多个周向限制件，沿所述转子的周向方向间隔设置，以限制所述磁极模组沿所述转子的周向方向的运动。
  2. 如权利要求1所述的永磁风力发电机的磁极固定装置，其特征在于，所述周向限制件包括固定筋。
  3. 如权利要求2所述的永磁风力发电机的磁极固定装置，其特征在于，所述固定筋与所述转子一体成型，或，所述固定筋通过焊接固定连接于或通过紧固件可拆卸连接于所述转子。
  4. 如权利要求1所述的永磁风力发电机的磁极固定装置，其特征在于，任意一所述凹槽内沿所述转子的轴向方向相邻的两所述磁极模组可拆卸连接。
  5. 如权利要求4所述的永磁风力发电机的磁极固定装置，其特征在于，所述径向限制组件包括第一卯孔和第一榫头，对于任意一所述凹槽内沿所述转子的轴向方向相邻的两所述磁极模组，其中一所述磁极模组的端部设有所述第一卯孔，另一所述磁极模组的端部设有所述第一榫头，两所述磁极模组通过所述第一卯孔和所述第一榫头榫卯连接。
  6. 如权利要求5所述的永磁风力发电机的磁极固定装置，其特征在于，所述径向限 制组件还包括第二卯孔和第二榫头，任意一所述凹槽内与所述轴向限制组件相邻的所述磁极模组为轴端磁极模组，所述轴端磁极模组与所述轴向限制组件这两者中的其中一个的端部设有所述第二卯孔、另一个的端部设有所述第二榫头，所述轴端磁极模组和所述轴向限制组件通过所述第二卯孔和所述第二榫头榫卯连接。
  7. 如权利要求1所述的永磁风力发电机的磁极固定装置，其特征在于，在沿所述转子的周向方向上相邻的两所述磁极模组通过一连接件连接成一联合磁极模组，任意一所述联合磁极模组中的两所述磁极模组分别容纳于沿所述转子的周向方向相邻的两所述凹槽内。
  8. 如权利要求7所述的永磁风力发电机的磁极固定装置，其特征在于，所述联合磁极模组的两侧面分别设有左侧固定块和右侧固定块，沿所述转子的周向方向相邻的两所述联合磁极模组可拆卸连接。
  9. 如权利要求8所述的永磁风力发电机的磁极固定装置，其特征在于，所述径向限制组件包括：
    第一径向连接孔，设于所述凹槽内，所述第一径向连接孔沿所述转子的径向方向延伸；
    第二径向连接孔，设于所述左侧固定块和所述右侧固定块，所述第二径向连接孔沿所述磁极模组的厚度方向延伸，对于沿所述转子的周向方向相邻的两所述联合磁极模组，其中一所述联合磁极模组的所述左侧固定块上的所述第二径向连接孔与相邻所述联合磁极模组的所述右侧固定块上的所述第二径向连接孔及相应的第一径向连接孔重合；
    径向紧固件，对于沿所述转子的周向方向相邻的两所述联合磁极模组，所述径向紧固件穿设于其中一所述联合磁极模组的所述左侧固定块上的所述第二径向连接孔以及相邻所述联合磁极模组的所述右侧固定块上的所述第二径向连接孔及第一径向连接孔；
    其中，所述磁极模组的厚度方向平行于所述转子的径向方向。
  10. 如权利要求9所述的永磁风力发电机的磁极固定装置，其特征在于，对于沿所述转子的周向方向相邻的两所述联合磁极模组，其中一所述联合磁极模组的所述左侧固定块和另一所述联合磁极模组的所述右侧固定块的厚度之和小于或等于所述联合磁极模 组中厚度较小的所述磁极模组的厚度。
  11. 如权利要求8所述的永磁风力发电机的磁极固定装置，其特征在于，所述径向限制组件包括第三卯孔和第三榫头，所述第三卯孔与所述第三榫头沿所述磁极模组的长度方向延伸，沿所述转子的周向方向相邻的两所述联合磁极模组，其中一所述联合磁极模组的所述左侧固定块和另一所述联合磁极模组的所述右侧固定块沿所述磁极模组的长度方向交错设置，且这两者中的其中一个设有所述第三卯孔、另一个设有所述第三榫头，沿所述转子的周向方向相邻的两所述联合磁极模组通过所述第三卯孔和所述第三榫头榫卯连接；
    其中，所述磁极模组的长度方向与所述转子的轴向方向平行。
  12. 如权利要求11所述的永磁风力发电机的磁极固定装置，其特征在于，对于沿所述转子的周向方向相邻的两所述联合磁极模组，其中一所述联合磁极模组的所述左侧固定块和另一所述联合磁极模组的所述右侧固定块的长度之和小于或等于所述联合磁极模组中长度较小的所述磁极模组的长度。
  13. 如权利要求8-12中至少一项所述的永磁风力发电机的磁极固定装置，其特征在于，所述磁极模组包括底座、壳盖和永磁体，所述底座和所述壳盖围成一外壳，所述永磁体位于所述外壳内，所述左侧固定块和所述右侧固定块分别设于所述外壳的侧面，并与所述底座一体成型；
    所述磁极模组的长度方向与所述转子的轴向方向平行，所述磁极模组的厚度方向平行于所述转子的径向方向。
  14. 如权利要求7-13中至少一项所述的永磁风力发电机的磁极固定装置，其特征在于，所述连接件与所述周向限制件相对的一面上设有凹陷部，所述凹陷部与所述周向限制件卡合连接。
  15. 如权利要求14所述的永磁风力发电机的磁极固定装置，其特征在于，所述连接件与所述磁极模组一体成型或通过所述连接件固定在所述磁极模组上。
  16. 如权利要求1-13、15中至少一项所述的永磁风力发电机的磁极固定装置，其特征在于，所述轴向限制组件与所述转子一体成型。
  17. 如权利要求1-13、15中至少一项所述的永磁风力发电机的磁极固定装置，其特征在于，两所述轴向限制组件分别连接于所述转子的两端，任意一所述轴向限制组件沿所述转子的径向方向的截面为一环形；或，
    两所述轴向限制组件分别连接于所述转子的两端，任意一所述轴向限制组件包括沿所述转子的周向方向间隔设置的多个轴向限制单元，多个所述轴向限制单元分别连接于所述凹槽的两端，且每一所述轴向限制单元连接于相邻的两所述周向限制件之间。
  18. 一种永磁风力发电机，包括磁极模组和转子，其特征在于，所述永磁风力发电机还包括如权利要求1-17中任意一项所述的永磁风力发电机的磁极固定装置。
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