CN110798000B - Permanent magnet fixing structure - Google Patents
Permanent magnet fixing structure Download PDFInfo
- Publication number
- CN110798000B CN110798000B CN201911102038.9A CN201911102038A CN110798000B CN 110798000 B CN110798000 B CN 110798000B CN 201911102038 A CN201911102038 A CN 201911102038A CN 110798000 B CN110798000 B CN 110798000B
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- permanent magnet
- section
- rotor core
- magnetic isolation
- fiber felt
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—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
Abstract
The invention discloses a permanent magnet fixing structure, wherein a permanent magnet is arranged on the inner surface or the outer surface of a rotor core through two adjacent magnetism isolating pressing strips, and the magnetism isolating pressing strips are in clearance fit with the permanent magnet; the magnetic isolation pressing strip comprises a fixing section assembled in the rotor core and a pressing section used for pressing the permanent magnet; the fixing section is inserted into the rotor core, and the fixing section and the rotor core are further fixed through a fastener arranged at the top end of the fixing section after assembly; the cross section of the compressing section is in a dovetail shape, and the side surface of the permanent magnet, which is connected with the compressing section, is matched with the shape of the compressing section. In the structure, the compression section can ensure that the permanent magnet cannot fall off from the inner surface or the outer surface of the rotor core; meanwhile, the fixing section and the rotor core can be fixed through the fastener, so that the permanent magnet fixing structure is simple in process and reliable in application.
Description
Technical Field
The invention relates to the technical field of permanent magnet direct drive motors, in particular to a permanent magnet fixing structure.
Background
The permanent magnets are magnetic force sources for generating magnetic fields, the permanent magnets in the permanent magnet synchronous motor are all arranged on the rotor to generate a rotor magnetic field, and the rotor magnetic field and the stator magnetic field are interacted, so that the purpose that electric energy is converted into mechanical energy or the mechanical energy is converted into electric energy is achieved. According to the difference of the positions of the permanent magnets on the rotor, the rotor structure of the permanent magnet synchronous motor is generally divided into three types: surface, built-in and claw-pole. Surface-type permanent magnets, i.e., permanent magnets, are mounted on the rotor surface, including the inner and outer surfaces of the rotor.
In the conventional surface permanent magnet structure, the permanent magnet is usually fixed by only gluing the permanent magnet on the surface of the rotor core, which has the following disadvantages: in the case of large vibrations and heating, the glue is effectively aged, causing the permanent magnets to shift in the circumferential direction, and even fall off.
In the prior art, the fixing mode of the permanent magnet is improved, and the permanent magnet is usually fixed on the inner surface or the outer surface of a rotor core by a magnetic isolation pressing strip. The magnetic isolation pressing strip is usually arranged between the adjacent permanent magnets and used for pressing or fixing the permanent magnets, and is made of a non-magnetic material so as to prevent the adjacent permanent magnets with different polarities from generating large magnetic leakage. In this way, the magnetic isolation pressing bar is fixed on the surface of the rotor core in two ways:
one method is to fix the magnetic separation strip through bolts or screws, and the method needs to adopt bolts or screws with specifications above M6 (because only the bolts or screws above M6 can have certain fastening force) to fasten the magnetic separation strip, but the method cannot be adopted under the condition that the width of the magnetic separation strip is less than 6 mm.
One is clamping, for example, a first dovetail groove is axially arranged on the inner surface of a rotor core body, the cross section of each magnetic isolation pressing strip is in a double-dovetail shape, the first dovetail of each magnetic isolation pressing strip is clamped into the first dovetail groove in the rotor core body, the second dovetail of each adjacent magnetic isolation pressing strip forms another dovetail groove, and the permanent magnet is clamped into the dovetail grooves. However, the structural design has the contradiction between the requirements of the assembly process and the application reliability: from the view of assembly process, in order to facilitate the insertion installation of the magnetic isolation pressing strips and the insertion installation of the permanent magnets, the sizes of the parts are required to be in clearance fit; however, when the vibration motor is used under a vibration condition, gaps existing among parts are easy to loosen parts such as permanent magnets and the like to cause failure; therefore, if the requirement of reliability of not loosening during movement is met, the dimensional fit among the parts needs to adopt interference or compression, and the interference fit causes difficult insertion and installation and cannot be realized by the process.
Disclosure of Invention
The invention aims to provide a permanent magnet fixing structure, wherein the magnetic isolation pressing strip has stronger fastening force on a permanent magnet, and the permanent magnet fixing structure is simple in process and reliable in application.
In order to achieve the aim, the invention provides a permanent magnet fixing structure which comprises a rotor core, a permanent magnet and a magnetism isolating pressing strip,
the permanent magnets are arranged on the inner surface or the outer surface of the rotor core through two adjacent magnetic isolation pressing strips, and the magnetic isolation pressing strips are in clearance fit with the permanent magnets;
the magnetic isolation pressing strip comprises a fixing section assembled in the rotor core and a pressing section used for pressing the permanent magnet; the fixing section is inserted into the rotor core, and the fixing section and the rotor core are further fixed through a fastener arranged at the top end of the fixing section after assembly; the cross section of the compressing section is in a dovetail shape, and the side surface of the permanent magnet, which is connected with the compressing section, is matched with the shape of the compressing section;
the fastener is two wedging sheets which are matched for use; a first expansion fiber felt is arranged on the compression section, and in an initial state, the outer side surface of the first expansion fiber felt is flush with the outer side surface of the compression section; and after the wedging sheets are assembled, the first expansion fiber felt expands and solidifies to compress the permanent magnet.
Preferably, the permanent magnet, the magnetic isolation pressing strip and the rotor core are sealed through glue pouring.
Preferably, a plurality of through holes are formed in the pressing section at positions close to the fixing section, and the first expanded fiber felt is arranged in the through holes.
Preferably, the through holes are uniformly arranged along the axial direction of the magnetic isolation pressing strip, and the through holes are coaxially arranged.
Preferably, a second groove is formed in the outer side face, which is in contact with the permanent magnet, of the part, close to the fixing section, of the pressing section, and the first expanded fiber felt is arranged in the second groove.
Preferably, the cross-section of the fixed section is dovetail-shaped or T-shaped.
Preferably, the permanent magnet is provided with retaining rings on both axial sides.
In order to achieve the aim, the invention provides another permanent magnet fixing structure which comprises a rotor core, a permanent magnet and a magnetism isolating pressing strip,
the permanent magnets are arranged on the inner surface or the outer surface of the rotor core through two adjacent magnetic isolation pressing strips, and the magnetic isolation pressing strips are in clearance fit with the permanent magnets;
the magnetic isolation pressing strip comprises a fixing section assembled in the rotor core and a pressing section used for pressing the permanent magnet; the fixing section is inserted into the rotor core, and the fixing section and the rotor core are further fixed through a fastener arranged at the top end of the fixing section after assembly; the cross section of the compressing section is in a dovetail shape, and the side surface of the permanent magnet, which is connected with the compressing section, is matched with the shape of the compressing section;
the fastener is a second expanded fiber felt arranged in a first groove at the top end of the fixed section, and in an initial state, the outer side surface of the second expanded fiber felt is flush with the outer side surface of the fixed section; a first expansion fiber felt is arranged on the compression section, and in an initial state, the outer side surface of the first expansion fiber felt is flush with the outer side surface of the compression section; after the permanent magnet and the magnetic isolation pressing strip are assembled, the second expansion fiber felt and the first expansion fiber felt expand and solidify together to press the permanent magnet tightly.
Preferably, a plurality of through holes are formed in the pressing section at positions close to the fixing section, and the first expanded fiber felt is arranged in the through holes.
Preferably, the through holes are uniformly arranged along the axial direction of the magnetic isolation pressing strip, and the through holes are coaxially arranged.
Preferably, a second groove is formed in the outer side face, which is in contact with the permanent magnet, of the part, close to the fixing section, of the pressing section, and the first expanded fiber felt is arranged in the second groove.
Preferably, the cross-section of the fixed section is dovetail-shaped or T-shaped.
Preferably, the permanent magnet is provided with retaining rings on both axial sides.
According to the permanent magnet fixing structure provided by the invention, the permanent magnet is arranged on the inner surface or the outer surface of the rotor core through two adjacent magnetic isolation pressing strips, and the magnetic isolation pressing strips are in clearance fit with the permanent magnet; the magnetic isolation pressing strip comprises a fixing section assembled in the rotor core and a pressing section used for pressing the permanent magnet; the fixing section is inserted into the rotor core, and the fixing section and the rotor core are further fixed through a fastener arranged at the top end of the fixing section after assembly; the cross section of the compressing section is in a dovetail shape, and the side surface of the permanent magnet, which is connected with the compressing section, is matched with the shape of the compressing section.
In the structure, the compression sections are dovetail-shaped sections, and the corresponding side surfaces of the permanent magnets, which are connected with the compression sections, need to be chamfered, so that the distance between the dovetails of the adjacent compression sections after assembly is smaller than the overall width of the permanent magnets, and the permanent magnets can be prevented from falling off from the inner surface or the outer surface of the rotor core; meanwhile, the fixing section and the rotor core can be fixed through the fastener, so that the permanent magnet fixing structure is simple in process and reliable in application.
In a specific embodiment, the fastening member is two wedge sheets used in cooperation, and the permanent magnet, the magnetic isolation pressing strip and the rotor core are sealed through glue filling.
In another specific embodiment, the fastening pieces are two wedge-caulking pieces which are used in a matched mode, the compression section is provided with a first expanded fiber felt, and in an initial state, the outer side face of the first expanded fiber felt is flush with the outer side face of the compression section; and after the wedging sheets are assembled, the first expansion fiber felt expands and solidifies to compress the permanent magnet.
The wedging structure or the expansion jacking structure enables the assembling process of the permanent magnet fixing structure to be simpler, and the wedging glue filling seal or the paint dipping expansion structure is firm, so that the requirement of process convenience is met, and the requirement of application reliability is met. In addition, the permanent magnet is integrally assembled by adopting sealing glue pouring or paint dipping, and a layer of protective film is generated on the outer surface of the permanent magnet, so that the corrosion resistance of the permanent magnet is improved.
Drawings
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, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is an overall sectional view of a permanent magnet fixing structure according to a first embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the permanent magnet attachment structure of FIG. 1;
FIG. 3 is a view showing a state of use of the wedge plate of FIG. 2;
FIG. 4 is an overall sectional view of a permanent magnet fixing structure in a second embodiment of the present invention;
FIG. 5 is an enlarged view of a portion of the permanent magnet attachment structure of FIG. 4;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;
FIG. 7 is a cross-sectional view of another arrangement of a first expanded fiber mat according to a second embodiment of the present invention;
FIG. 8 is a partially enlarged view of a permanent magnet fixing structure in a third embodiment of the present invention;
FIG. 9 is a cross-sectional view of another arrangement of the first expanded fibrous mat according to the third embodiment of the present invention;
fig. 10 is a cross-sectional view of a second arrangement of the anchoring segment according to the first embodiment of the invention.
The reference numerals in fig. 1 to 10 are as follows:
1-a rotor core; 2-wedging sheets, 3-permanent magnets; 4-magnetic isolation layering; 5-a first expanded fiber mat; 6-second expanded fiber felt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a permanent magnet fixing structure, wherein the magnetic isolation pressing strip has stronger fastening force on the permanent magnet, and the permanent magnet fixing structure has simple process and reliable application.
Referring to fig. 1 to 10, fig. 1 is a general sectional view of a permanent magnet fixing structure according to a first embodiment of the present invention; FIG. 2 is an enlarged view of a portion of the permanent magnet attachment structure of FIG. 1; FIG. 3 is a view showing a state of use of the wedge plate of FIG. 2; FIG. 4 is an overall sectional view of a permanent magnet fixing structure in a second embodiment of the present invention; FIG. 5 is an enlarged view of a portion of the permanent magnet attachment structure of FIG. 4; FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5; FIG. 7 is a cross-sectional view of another arrangement of a first expanded fiber mat according to a second embodiment of the present invention; FIG. 8 is a partially enlarged view of a permanent magnet fixing structure in a third embodiment of the present invention; FIG. 9 is a cross-sectional view of another arrangement of the first expanded fibrous mat according to the third embodiment of the present invention; fig. 10 is a cross-sectional view of a second arrangement of the anchoring segment according to the first embodiment of the invention.
The permanent magnet fixing structure provided by the invention comprises a rotor iron core 1, a permanent magnet 3 and a magnetism isolating pressing strip 4; the permanent magnet 3 is arranged on the inner surface or the outer surface of the rotor core 1 through two adjacent magnetism isolating pressing strips 4, namely the permanent magnet fixing structure is suitable for an inner rotor permanent magnet direct drive motor and an outer rotor permanent magnet direct drive motor.
The magnetic isolation pressing strip 4 comprises a fixing section and a pressing section, wherein the fixing section is assembled in the rotor core 1, the pressing section is used for pressing the permanent magnet 3, the fixing section is inserted into the rotor core 1 and is connected with the rotor core 1 in a sliding mode in a small axial gap mode to facilitate installation of the magnetic isolation pressing strip 4, the fixing section and the fixing section are further fixed through a fastener arranged at the top end of the fixing section after assembly is completed, and therefore the magnetic isolation pressing strip 4 is fixedly connected with the rotor core 1. The magnetic isolation pressing strip 4 and the rotor core are axially assembled to slide in a small gap, and the specific gap can be 0.2-0.5 mm. Generally, due to the small width dimension of the magnetic shielding batten 4, the fastening position of the magnetic shielding batten 4 and the rotor core 1 is placed at the top of the fixed section.
The section of the compressing section is in a dovetail shape, the side face of the permanent magnet 3 connected with the compressing section is matched with the shape of the compressing section, namely the centripetal face of the permanent magnet 3 in the permanent magnet fixing structure in the outer rotor motor is provided with a chamfering structure, and the centripetal end of the magnetism isolating pressing strip 4 is correspondingly in the dovetail shape, so that the distance between the centripetal dovetails of the adjacent magnetism isolating pressing strips 4 after assembly is smaller than the width of the permanent magnet 3, and the permanent magnet 3 is prevented from centripetally falling off.
The permanent magnet 3 and the magnetic isolation pressing strip 4 are in clearance fit, so that the installation is convenient.
The cross section of the fixing section can also be in a dovetail shape, so that the magnetic isolation pressing strip 4 is in a double-dovetail structure, but the cross section can also be in a T shape, as shown in fig. 9. The fixing sections are assembled in dovetail grooves or T-shaped grooves of the rotor core 1, and dovetail structures or T-shaped structures can ensure that the magnetic isolation pressing strips 4 cannot radially fall off.
In the axial direction of the motor, the permanent magnet 3 and the magnetic isolation pressing strips 4 can be made into multiple sections, so that the total length of the permanent magnet 3 is matched with that of the rotor core 1.
In addition, a retaining ring can be arranged to position the permanent magnet 3 in the axial direction, and is usually arranged at the outermost axial ends of the permanent magnet 3.
The magnetic isolation pressing strip 4 in the permanent magnet fixing structure is simple and effective in fixing the permanent magnet 1, and the whole structure is simple in process and reliable in application.
In the first embodiment, the fastening member is a wedging sheet 2, and the two wedging sheets 2 are usually used in cooperation with each other at the same angle, and are respectively driven into the wedging sheet 2 from a small-sized thickness space of the magnetic-isolating pressing strip 4 in an axial direction to be wedged tightly, wherein the wedging angle is slightly small, for example, 1 to 2 degrees.
After the wedging pieces 2 are assembled, glue is filled and sealed among the permanent magnet 3, the magnetic isolation pressing strips 4 and the rotor core 1, so that the fastening effect of the magnetic isolation pressing strips 4 on the permanent magnet 3 is further enhanced, a layer of protective film is generated on the outer surface of the permanent magnet 3, and the corrosion resistance of the permanent magnet 3 is facilitated. The glue filling and sealing is a common gluing method in the prior art, and the detailed operation steps refer to the prior art and are not described herein again.
In the second embodiment, the fastener is still a wedging sheet 2, and the two wedging sheets 2 are used in cooperation, and the arrangement is the same as that in the first embodiment. Meanwhile, the first expansion fiber felt 5 is arranged on the compression section, and in an initial state, the outer side surface of the first expansion fiber felt 5 is flush with the outer side surface of the compression section, so that the installation of the magnetic isolation pressing strip 4 is not influenced; after the wedging pieces 2 are assembled, the first expansion fiber felt 5 can be expanded and cured by adopting a baking vacuum paint dipping process so as to compress the permanent magnet 3.
The materials and baking vacuum dip coating process for the expanded fiber mat are the prior art, are not the invention point of the present invention, and therefore are not described in detail herein. However, the technical parameters of the first expanded fiber mat can be referred to as follows: the first expanded fiber mat may have a thermal expansion rate of more than 50% or 100% when heated to 80 ℃ or 130 ℃.
The expansion jacking structure can replace sealing glue pouring in the pure wedging structure, and also has the advantages of convenient assembly process of the magnetic isolation pressing strip 4 and better fastening effect of the whole permanent magnet fixing structure, thereby not only meeting the requirement of convenient process, but also meeting the requirement of application reliability.
Specifically, the first expanded fiber mat 5 may be disposed in two ways:
one is that a plurality of through holes are arranged at the part of the compressing section close to the fixing section, a first expansion fiber felt 5 is arranged in each through hole, furthermore, each through hole can be uniformly arranged along the axial direction of the magnetic isolation pressing strip 4, and each through hole is coaxially arranged.
And the other is that a second groove is arranged on the outer side surface of the part, close to the fixed section, of the compression section, which is in contact with the permanent magnet 3, and a first expansion fiber felt 5 is arranged in the second groove. The second groove may be provided on only one side of the pressing section, or on both sides.
In a third embodiment, the fastener is a second expanded fiber felt 6 arranged in a first groove at the top end of the fixed section, and in an initial state, the outer side surface of the second expanded fiber felt 6 is flush with the outer side surface of the fixed section; meanwhile, the compaction section is still provided with a first expanded fiber felt 5, and in an initial state, the outer side surface of the first expanded fiber felt 5 is flush with the outer side surface of the compaction section; after the permanent magnet 3 and the magnetic isolation pressing strip 4 are assembled, the second expanded fiber felt 6 and the first expanded fiber felt 5 are expanded, dipped in paint and cured together, and then the permanent magnet 3 is pressed tightly.
The material of the second expanded fiber mat is also the prior art, and may be specifically the same as the material of the first expanded fiber mat, which is not the point of the present invention, and therefore, the detailed description thereof is omitted. While the technical parameters of the second expanded fiber mat may be referenced to the first expanded fiber mat.
In the third embodiment, the second expanded fiber felt 6 is used for replacing the wedging sheet 2 in the first two embodiments, the installation process corresponding to the permanent magnet fixing structure is further simplified, the structure is firm, and the requirements of process convenience and application reliability are met.
The first expanded fiber mat 5 and the second expanded fiber mat 6 may be thin and may have a thickness of 1 mm.
In the third embodiment, there may be two types of arrangement manners of the first expanded fiber mat 5, which are specifically the same as those in the second embodiment and are not described again.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The permanent magnet fixing structure provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (13)
1. A permanent magnet fixing structure comprises a rotor core, a permanent magnet and a magnetic isolation pressing strip, and is characterized in that,
the permanent magnets are arranged on the inner surface or the outer surface of the rotor core through two adjacent magnetic isolation pressing strips, and the magnetic isolation pressing strips are in clearance fit with the permanent magnets;
the magnetic isolation pressing strip comprises a fixing section assembled in the rotor core and a pressing section used for pressing the permanent magnet; the fixing section is inserted into the rotor core, and the fixing section and the rotor core are further fixed through a fastener arranged at the top end of the fixing section after assembly; the cross section of the compressing section is in a dovetail shape, and the side surface of the permanent magnet, which is connected with the compressing section, is matched with the shape of the compressing section;
the fastener is two wedging sheets which are matched for use; a first expansion fiber felt is arranged on the compression section, and in an initial state, the outer side surface of the first expansion fiber felt is flush with the outer side surface of the compression section; and after the wedging sheets are assembled, the first expansion fiber felt expands and solidifies to compress the permanent magnet.
2. The permanent magnet fixing structure according to claim 1,
and glue is filled among the permanent magnet, the magnetic isolation pressing strip and the rotor core for sealing.
3. The permanent magnet fixing structure according to claim 1,
the compressing section is provided with a plurality of through holes at positions close to the fixing section, and the first expansion fiber felt is arranged in the through holes.
4. The permanent magnet fixing structure according to claim 3,
the through holes are uniformly arranged along the axial direction of the magnetic isolation pressing strip and are coaxially arranged.
5. The permanent magnet fixing structure according to claim 1,
and a second groove is formed in the outer side surface, which is in contact with the permanent magnet, of the part, close to the fixing section, of the pressing section, and the first expanded fiber felt is arranged in the second groove.
6. The permanent magnet fixing structure according to claim 1,
the section of the fixed section is in a dovetail shape or a T shape.
7. The permanent magnet fixing structure according to claim 6,
and the two axial sides of the permanent magnet are provided with check rings.
8. A permanent magnet fixing structure comprises a rotor core, a permanent magnet and a magnetic isolation pressing strip, and is characterized in that,
the permanent magnets are arranged on the inner surface or the outer surface of the rotor core through two adjacent magnetic isolation pressing strips, and the magnetic isolation pressing strips are in clearance fit with the permanent magnets;
the magnetic isolation pressing strip comprises a fixing section assembled in the rotor core and a pressing section used for pressing the permanent magnet; the fixing section is inserted into the rotor core, and the fixing section and the rotor core are further fixed through a fastener arranged at the top end of the fixing section after assembly; the cross section of the compressing section is in a dovetail shape, and the side surface of the permanent magnet, which is connected with the compressing section, is matched with the shape of the compressing section;
the fastener is a second expanded fiber felt arranged in a first groove at the top end of the fixed section, and in an initial state, the outer side surface of the second expanded fiber felt is flush with the outer side surface of the fixed section; a first expansion fiber felt is arranged on the compression section, and in an initial state, the outer side surface of the first expansion fiber felt is flush with the outer side surface of the compression section; after the permanent magnet and the magnetic isolation pressing strip are assembled, the second expansion fiber felt and the first expansion fiber felt expand and solidify together to press the permanent magnet tightly.
9. The permanent magnet fixing structure according to claim 8,
the compressing section is provided with a plurality of through holes at positions close to the fixing section, and the first expansion fiber felt is arranged in the through holes.
10. The permanent magnet fixing structure according to claim 9,
the through holes are uniformly arranged along the axial direction of the magnetic isolation pressing strip and are coaxially arranged.
11. The permanent magnet fixing structure according to claim 8,
and a second groove is formed in the outer side surface, which is in contact with the permanent magnet, of the part, close to the fixing section, of the pressing section, and the first expanded fiber felt is arranged in the second groove.
12. The permanent magnet fixing structure according to claim 8,
the section of the fixed section is in a dovetail shape or a T shape.
13. The permanent magnet fixing structure according to claim 12,
and the two axial sides of the permanent magnet are provided with check rings.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911102038.9A CN110798000B (en) | 2019-11-12 | 2019-11-12 | Permanent magnet fixing structure |
| PCT/CN2019/127889 WO2021093102A1 (en) | 2019-11-12 | 2019-12-24 | Permanent magnet fixing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911102038.9A CN110798000B (en) | 2019-11-12 | 2019-11-12 | Permanent magnet fixing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110798000A CN110798000A (en) | 2020-02-14 |
| CN110798000B true CN110798000B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911102038.9A Active CN110798000B (en) | 2019-11-12 | 2019-11-12 | Permanent magnet fixing structure |
Country Status (2)
| Country | Link |
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| CN (1) | CN110798000B (en) |
| WO (1) | WO2021093102A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202713000U (en) * | 2011-09-29 | 2013-01-30 | 西门子公司 | Permanent magnet synchronous motor and rotor thereof |
| CN102611227A (en) * | 2012-03-20 | 2012-07-25 | 中科盛创（青岛）电气有限公司 | Magnetic isolation structure of megawatt-level half-direct-drive permanent magnet motor rotor |
| CN104518589B (en) * | 2013-09-27 | 2017-12-15 | 安徽明腾永磁机电设备有限公司 | Rare-earth permanent magnet motor rotor structure |
| CA2936022A1 (en) * | 2014-02-03 | 2015-08-06 | Canrig Drilling Technology Ltd. | Coupling of permanent magnets in electric motors |
| CN206894383U (en) * | 2017-05-12 | 2018-01-16 | 明阳智慧能源集团股份公司 | A kind of middling speed magneto alternator rotor magnetic pole mounting structure |
| CN109742913A (en) * | 2018-12-20 | 2019-05-10 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | A kind of permanent magnetism magnetic pole fixing means and rotor |
| CN209282962U (en) * | 2019-01-29 | 2019-08-20 | 浙江尤奈特电机有限公司 | Motor internal rotor magnetic steel fixed structure |
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2019
- 2019-11-12 CN CN201911102038.9A patent/CN110798000B/en active Active
- 2019-12-24 WO PCT/CN2019/127889 patent/WO2021093102A1/en active Application Filing
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| Publication number | Publication date |
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| WO2021093102A1 (en) | 2021-05-20 |
| CN110798000A (en) | 2020-02-14 |
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