CN117543860B - Motor rotor and manufacturing method thereof - Google Patents
Motor rotor and manufacturing method thereof Download PDFInfo
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- CN117543860B CN117543860B CN202410032097.8A CN202410032097A CN117543860B CN 117543860 B CN117543860 B CN 117543860B CN 202410032097 A CN202410032097 A CN 202410032097A CN 117543860 B CN117543860 B CN 117543860B
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- groove
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 165
- 239000004917 carbon fiber Substances 0.000 claims abstract description 164
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 163
- 230000001681 protective effect Effects 0.000 claims abstract description 34
- 238000004804 winding Methods 0.000 claims abstract description 29
- 239000000853 adhesive Substances 0.000 claims description 29
- 230000001070 adhesive effect Effects 0.000 claims description 29
- 239000000835 fiber Substances 0.000 claims description 28
- 239000004744 fabric Substances 0.000 claims description 27
- 239000007822 coupling agent Substances 0.000 claims description 14
- 238000011282 treatment Methods 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 11
- 238000007254 oxidation reaction Methods 0.000 claims description 11
- 239000004593 Epoxy Substances 0.000 claims description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 9
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 5
- 239000004033 plastic Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 1
- 229920002748 Basalt fiber Polymers 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000013532 laser treatment Methods 0.000 description 1
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- 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
- H02K1/26—Rotor cores with slots for windings
- H02K1/265—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The application discloses a motor rotor and a manufacturing method thereof, and belongs to the technical field of motors. The motor rotor comprises a rotor core and a carbon fiber protective sleeve, wherein the carbon fiber protective sleeve is tightly attached to the outer side of the rotor core, a plurality of grooves are formed in the outer side of the rotor core in the axial direction of the rotor core, the grooves are formed along the circumferential direction of the rotor core, and the carbon fiber protective sleeve comprises a multi-layer structure formed by winding carbon fiber bundles; at least a part of the carbon fiber bundles in the innermost layer are embedded in the groove. The motor rotor increases the interfacial bonding strength between the carbon fiber protective sleeve and the rotor core, so that the carbon fiber protective sleeve can better protect the rotor during the motor operation, and can adapt to higher rotating speed requirements.
Description
Technical Field
The application relates to a motor rotor and a manufacturing method thereof, and belongs to the technical field of motors.
Background
With the development of the motor to the high speed and high power density, compared with the traditional electric excitation motor, the permanent magnet motor, in particular the rare earth permanent magnet motor, has the characteristics of simple structure, reliable operation, small volume, light weight, small loss and high efficiency, and the motor has flexible and various shapes and sizes, so that the motor has extremely wide application range and almost extends to various fields of aerospace, national defense, industrial and agricultural production, new energy automobiles and daily life. However, for permanent magnet motors, especially high-speed permanent magnet motors, how to fix the magnetic steel at a rotation speed of 20000rpm or more, and to prevent the magnetic steel from flying out under the centrifugal force to cause serious deformation or even bursting of the rotor, has been the focus of engineers. One way to increase the structural strength of the rotor is to add a jacket outside the rotor core, for example: glass fiber sheath, carbon fiber sheath, etc.
At present, a carbon fiber sheath mainly adopts thermosetting epoxy resin as winding adhesive, carbon fibers impregnated with liquid epoxy resin are wound by a wet method or carbon fiber prepreg prepared into semi-solidification in advance is wound, and the carbon fiber is formed after being heated and solidified.
However, when the processed carbon fiber is wound on the surface of the rotor core, the contact position between the inner carbon fiber and the surface of the rotor core often causes gaps between the carbon fiber protective sleeve and the rotor core due to centrifugal force when the carbon fiber rotor works because of insufficient adhesive force, and the strength requirement under the actual working condition cannot be met.
Disclosure of Invention
In order to solve the problems, the motor rotor and the manufacturing method thereof are provided, and the bonding strength of the interface between the carbon fiber protective sleeve and the rotor core is increased, so that the carbon fiber protective sleeve can better protect the rotor when the motor works, and the motor rotor is suitable for higher rotating speed requirements.
The invention provides the following technical scheme:
According to one aspect of the application, a motor rotor is provided, which comprises a rotor core and a carbon fiber protective sleeve, wherein the carbon fiber protective sleeve is closely attached to the outer side of the rotor core, so that gaps between the carbon fiber protective sleeve and the rotor core due to centrifugal force are avoided when the rotor works, and higher rotating speed requirements are met;
in the axial direction of the rotor core, a plurality of grooves are formed on the outer side of the rotor core, and the grooves are arranged along the circumferential direction of the rotor core, so that the contact area between the rotor core and the carbon fiber protective sleeve is increased, and better interface combination is realized;
the carbon fiber protective sleeve comprises a multi-layer structure formed by winding carbon fiber bundles, the carbon fiber bundles at the innermost layer can be embedded in the groove, or only one part of the carbon fiber bundles are embedded in the groove, and the other part of the carbon fiber bundles are outside the groove. The carbon fiber bundles of the innermost layer are embedded into the grooves, so that the connection strength and stability between the carbon fiber protective sleeve and the rotor core are improved.
Optionally, the width of the groove mouth of the groove is smaller than the diameter of the carbon fiber bundle, and the depth of the groove is smaller than the diameter of the carbon fiber bundle; so arranged, the movement of the carbon fiber bundles along the axial direction of the iron core can be limited by the grooves.
Specifically, the diameter of the carbon fiber bundles is 0.05-1mm, the width of the notch of the groove is 0.05-1mm, and the depth of the groove is 0.015-0.6mm.
Optionally, the width of the groove notch is smaller than the maximum width of the groove; that is, the grooves are of a locking structure, and the carbon fiber bundles can be better fixed after entering the grooves.
Specifically, the width of the groove opening of the groove is 0.05-0.5mm, and the maximum width of the groove is 0.05-1mm.
Optionally, the height of the embedded part of the carbon fiber bundle embedded in the groove is at least one third of the diameter of the carbon fiber bundle, relative to the situation that the carbon fiber bundle is fully embedded in the groove, part of the carbon fiber monofilaments are exposed out of the groove, so that the contact area between the inner carbon fiber bundle and the outer carbon fiber bundle can be increased, and when the rotor rotates, the inner carbon fiber bundle generates a pulling force towards the axis direction for counteracting part of centrifugal force due to the limiting effect of the groove, so that the inner carbon fiber bundle and the outer carbon fiber bundle are combined more firmly.
Optionally, the carbon fiber protective sleeve further comprises fiber cloth, the fiber cloth is tightly attached to the rotor core, and the carbon fiber bundles are arranged on one surface, away from the rotor core, of the fiber cloth.
Specifically, an adhesive is coated on the contact surface of the fiber cloth and the carbon fiber bundle, and a coupling agent is coated on the surface of the fiber cloth, which faces away from the carbon fiber bundle; according to the mode, the fiber cloth is used as a carrier to bond the plurality of carbon fiber bundles together, so that the carbon fiber protective sleeve and the rotor core are bonded more firmly.
Optionally, the carbon fiber bundles are formed by twisting a plurality of carbon fiber monofilaments, so that the carbon fiber bundles are better fixed in the grooves, namely, the carbon fiber bundles cannot be broken due to deformation when being embedded in the grooves, and the integrity of the carbon fiber bundles is ensured; on the other hand, the adhesive can bond the carbon fiber bundles into the grooves better, because the surface flatness of the twisted carbon fiber bundles is reduced and the roughness is increased relative to untwisted carbon fiber bundles, and the adhesive can fix the carbon fiber bundles in the grooves better.
According to still another aspect of the present application, there is provided a method of manufacturing a motor rotor, comprising the steps of:
S1, carrying out laser oxidation treatment on the inner surface of a groove of a formed rotor core;
s2, winding the carbon fiber bundles on the outer side of the rotor core treated by the S1, embedding all or part of the carbon fiber bundles positioned in the innermost layer into the grooves, wherein the height of the embedded parts is at least one third of the diameter of the carbon fiber bundles, and heating and curing to obtain the motor rotor.
The chemical property of the inner surface of the groove can be changed through laser oxidation, so that after the adhesive on the carbon fiber bundles contacts the inner surface of the groove subjected to laser oxidation treatment, chemical bonds such as C-O bonds, H-O bonds, si-O bonds, ti-O bonds and the like are formed between the adhesive and the inner surface of the groove, and stable interface combination is realized.
Optionally, S2 is: and (3) coating the surface of the rotor core treated by the S1 with fiber cloth, wherein a coupling agent is coated on the contact surface of the fiber cloth and the rotor core, an adhesive is coated on the other surface of the fiber cloth, then winding the carbon fiber bundles impregnated with the adhesive on the surface of the fiber cloth coated with the adhesive, embedding all or part of the carbon fiber bundles at the innermost layer into the grooves, wherein the height of the embedded part is at least one third of the diameter of the carbon fiber bundles, and heating and curing to obtain the motor rotor.
Optionally, before the step S2, adding an adhesive to the carbon fiber bundles, wherein the adhesive comprises epoxy resin and a coupling agent, and the addition amount of the coupling agent is 0.1-1wt%;
the coupling agent is an epoxy silane coupling agent or a tetrabutyl titanate coupling agent.
Alternatively, the conditions of the laser oxidation treatment in S1 are: the laser power is 100-1000W, the laser beam diameter is 0.05-1mm, the line spacing is 0.05-0.2mm, the scanning speed is 500-3000mm/s, and the frequency is 15-25kHz.
Optionally, the winding condition of the carbon fiber bundles in S2 is: the winding tension is 100-300N, the scraper gap is 0.05-0.15mm, and the winding speed is 5000-7000mm/min.
The beneficial effects of the application include, but are not limited to:
According to the motor rotor and the manufacturing method thereof, the groove structure is arranged, so that the carbon fiber bundles can be at least partially embedded in the groove, the contact area between the rotor core and the carbon fiber protective sleeve is increased, the connection strength and stability between the rotor core and the carbon fiber protective sleeve are improved, and better interface combination is realized; the chemical property of the inner surface of the groove can be changed through laser oxidation, so that after the adhesive on the carbon fiber bundles contacts the inner surface of the groove subjected to laser oxidation treatment, chemical bonds such as C-O bonds, H-O bonds, si-O bonds, ti-O bonds and the like are formed between the adhesive and the inner surface of the groove, the bonding force between the carbon fiber protective sleeve and the rotor core is increased, and the carbon fiber protective sleeve is firmer; the grooves adapting to carbon fiber bundles of various sizes can be processed by adopting laser treatment, the method is simple and convenient, parameter adjustment can be carried out at any time so as to adapt to different working conditions, the carbon fiber protective sleeve is ensured to be covered on the surface of the rotor core more smoothly, and the performance of the carbon fiber protective sleeve is enhanced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a schematic structural view of an axial section of a motor rotor according to the present invention.
Fig. 2 is another schematic structural view of an axial section of a rotor of an electric motor according to the present invention.
Fig. 3 is a front view of the rotor core of the present invention.
Fig. 4 is a front view of the motor rotor of the present invention.
List of parts and reference numerals:
10. Rotor core, 20, carbon fiber bundle, 30, fiber cloth, 40, recess.
Detailed Description
The following description of the present invention refers to the accompanying drawings and examples, but is not limited to the same, and modifications and equivalents of the present invention can be made without departing from the spirit and scope of the present invention.
As shown in fig. 1, 3 and 4, the invention provides a motor rotor, which comprises a rotor core 10 and a carbon fiber protective sleeve, wherein the carbon fiber protective sleeve is tightly attached to the outer side of the rotor core 10, so that gaps between the carbon fiber protective sleeve and the rotor core 10 due to centrifugal force are avoided when the rotor works, and higher rotating speed requirements are met.
In the axial direction of the rotor core 10, a plurality of grooves 40 are formed on the outer side of the rotor core 10, the grooves 40 are arranged along the circumferential direction of the rotor core 10, the contact area between the rotor core 10 and the carbon fiber protective sleeve is increased, and better interface combination is facilitated.
The carbon fiber protective sleeve is formed by winding carbon fiber bundles 20, and the carbon fiber bundles 20 are wound on the surface of the rotor core 10 in multiple layers. For the innermost carbon fiber bundles 20, they are at least partially embedded within the grooves 40. Specifically, a part of the carbon fiber bundles 20 of the inner layer is embedded in the groove 40, and the part of the carbon fiber bundles 20 may be embedded in the whole section, or only a part of the carbon fiber bundles may be embedded, and another part of the carbon fiber bundles may be exposed in the groove 40. The embedding of the carbon fiber bundles 20 into the grooves 40 helps to improve the strength and stability of the connection between the carbon fiber protective sheath and the rotor core 10.
Further, the width of the notch of the groove 40 is smaller than the diameter of the carbon fiber bundle 20, and the depth of the groove 40 is smaller than the diameter of the carbon fiber bundle 20; so configured, the movement of the carbon fiber bundles 20 in the core axial direction may be restricted by the grooves 40.
Further, the diameter of the carbon fiber bundles 20 is 0.05-1mm, the width of the notch of the groove 40 is 0.05-1mm, and the depth of the groove 40 is 0.015-0.6mm.
Further, the width of the notch 40 is smaller than the maximum width of the notch 40; that is, the grooves 40 are of a locking structure, and the carbon fiber bundles 20 can be better fixed after entering the grooves 40.
Further, the width of the notch 40 is 0.05-0.5mm, and the maximum width of the notch 40 is 0.05-1mm.
Further, the height of the embedded portion of the carbon fiber bundle 20 embedded in the groove 40 is at least one third of the diameter of the carbon fiber bundle 20, and compared with the case that the carbon fiber bundle 20 is fully embedded in the groove 40, part of the carbon fiber monofilaments are exposed out of the groove 40, so that the contact area between the inner carbon fiber bundle 20 and the outer carbon fiber bundle 20 can be increased, and when the rotor rotates, the inner carbon fiber bundle 20 generates a pulling force towards the axial direction for counteracting part of centrifugal force due to the limiting effect of the groove 40, so that the inner carbon fiber bundle 20 and the outer carbon fiber bundle 20 are combined more firmly.
Further, the carbon fiber bundles 20 are formed by twisting a plurality of carbon fiber monofilaments, so that on one hand, the carbon fiber bundles 20 are better fixed in the grooves 40, namely, the carbon fiber bundles 20 cannot be broken due to deformation when being embedded into the grooves 40, and the integrity of the carbon fiber bundles 20 is ensured; on the other hand, the adhesive can better bond the carbon fiber bundles 20 into the grooves 40 because the twisted carbon fiber bundles 20 have reduced surface flatness and increased roughness relative to untwisted carbon fiber bundles 20, and the adhesive can better fix the carbon fiber bundles 20 in the grooves 40.
As shown in fig. 2, the present invention provides another motor rotor, and on the basis of fig. 1, the carbon fiber protective sleeve further includes a fiber cloth 30, the fiber cloth 30 is closely attached to the rotor core 10, and the carbon fiber bundles 20 are disposed on a side of the fiber cloth 30 away from the rotor core 10.
Specifically, the contact surface of the fiber cloth 30 and the carbon fiber bundle 20 is coated with an adhesive, and the surface of the fiber cloth 30 facing away from the carbon fiber bundle 20 is coated with a coupling agent. The fiber cloth 30 is coated on the surface of the rotor core 10, and then the carbon fiber bundles 20 are wound on one surface of the fiber cloth 30 with the adhesive. So that the fiber cloth 30 can be filled and fitted into the grooves 40 during the winding of the carbon fiber bundles 20. In this way, the fiber cloth 30 is used as a carrier to bond the plurality of carbon fiber bundles 20 together, so that the carbon fiber protective sleeve and the rotor core 10 are bonded more firmly.
In the invention, the model of the carbon fiber monofilament can be T300, T700, T800 or T1000, and is purchased from Zhongfushen eagle carbon fiber Co., ltd;
The fiber cloth can be made of nylon, glass fiber, basalt fiber, aramid fiber or polyphenylene sulfide fiber, and is purchased from Jiangsu Fushijia Gao Kete material science and technology Co., ltd;
the epoxy resin is Epikote828, and the manufacturer is RESOLUTION;
the epoxy silane coupling agent is KH-560, which is purchased from Nanjing Xuan, new material technology Co., ltd;
the tetrabutyl titanate coupling agent referred to below is of industrial grade, purchased from Shandong Yao optimization chemical Co.
Example 1
A method of manufacturing a motor rotor comprising the steps of:
S1, carrying out laser oxidation treatment on the inner surface of a groove of a formed rotor core, wherein laser parameters are as follows: the power of the laser is 300W, the diameter of the laser beam is 0.2mm, the line interval is 0.1mm, the scanning speed is 1500mm/s, the frequency is 20kHz, and the maximum width of the obtained groove is 0.25mm;
S2, winding the carbon fiber bundles impregnated with the adhesive on the outer side of the rotor core after the S1 treatment, wherein the adhesive comprises epoxy resin and epoxy silane coupling agent, the addition amount of the epoxy silane coupling agent is 1wt%, the winding tension is 200N, the clearance of a scraper is 0.1mm, the winding speed is 6000mm/min, a part of the carbon fiber bundles positioned on the innermost layer are embedded into the grooves, the rest of the carbon fiber bundles are not embedded into the grooves, the height of the embedded part is one half of the diameter of the carbon fiber bundles, and heating and curing are carried out for 3 hours at 160 ℃ to obtain the carbon fiber rotor with the resin content of 25 wt%.
After 25000rpm overspeed test, the rotor diameter plastic deformation was 0.05mm.
Example 2
A method of manufacturing a motor rotor comprising the steps of:
S1, carrying out laser oxidation treatment on the inner surface of a groove of a formed rotor core, wherein laser parameters are as follows: the power of the laser is 500W, the diameter of the laser beam is 0.4mm, the line interval is 0.15mm, the scanning speed is 2000mm/s, the frequency is 20kHz, and the maximum width of the obtained groove is 0.45mm;
S2, winding the carbon fiber bundles impregnated with the adhesive on the outer side of the rotor core after the S1 treatment, wherein the adhesive comprises epoxy resin and tetrabutyl titanate coupling agent, the addition amount of the tetrabutyl titanate coupling agent is 1wt%, the winding tension is 200N, the clearance of a scraper is 0.1mm, the winding speed is 6000mm/min, the carbon fiber bundles in the innermost layer are fully embedded into the grooves, the height of the embedded parts is one third of the diameter of the carbon fiber bundles, and the carbon fiber rotor with the resin content of 25wt% is obtained by heating and curing for 3 hours at 160 ℃.
After 25000rpm overspeed test, the rotor diameter plastic deformation was 0.06mm.
Example 3
A method of manufacturing a motor rotor comprising the steps of:
S1, carrying out laser oxidation treatment on the inner surface of a groove of a formed rotor core, wherein laser parameters are as follows: the power of the laser is 500W, the diameter of the laser beam is 0.4mm, the line interval is 0.15mm, the scanning speed is 2000mm/s, the frequency is 20kHz, and the maximum width of the obtained groove is 0.45mm;
S2, winding a carbon fiber prepreg tape which is made of carbon fiber bundles and contains B-stage resin on the outer side of the rotor core after being treated by the S1, wherein the winding speed is 6000mm/min, part of the carbon fiber bundles positioned in the innermost layer are embedded into the grooves, the rest carbon fiber bundles are not embedded, the height of the embedded part is one third of the diameter of the carbon fiber bundles, and heating and curing are carried out for 3 hours at 160 ℃ to obtain the carbon fiber rotor with the resin content of 25 wt%.
After 25000rpm overspeed test, the rotor diameter plastic deformation was 0.08mm.
Example 4
The difference from example 1 is that:
The adhesive does not contain an epoxy silane coupling agent.
After 25000rpm overspeed test, the rotor diameter plastic deformation was 0.13mm.
Example 5
The difference from example 1 is that:
S2 is as follows: coating fiber cloth on the surface of the rotor core after the S1 treatment, wherein an epoxy silane coupling agent is coated on the contact surface of the fiber cloth and the rotor core, and an adhesive is coated on the other surface, wherein the adhesive comprises epoxy resin and the epoxy silane coupling agent, and the addition amount of the epoxy silane coupling agent is 1wt%; winding the carbon fiber bundles impregnated with the adhesive on one surface of the fiber cloth coated with the adhesive, wherein the winding tension is 200N, the clearance of a scraper is 0.1mm, the winding speed is 6000mm/min, a part of the carbon fiber bundles positioned in the innermost layer are embedded into the grooves, the rest carbon fiber bundles are not embedded, the height of the embedded part is one third of the diameter of the carbon fiber bundles, and heating and curing are carried out for 3 hours at 160 ℃ to obtain the carbon fiber rotor with the resin content of 25 wt%.
After 25000rpm overspeed test, the rotor diameter plastic deformation was 0.04mm.
Comparative example
The difference from example 1 is that:
S1 is not included;
S2 is as follows: and winding the carbon fiber bundles impregnated with the epoxy resin on the outer side of the rotor core, wherein the winding tension is 200N, the clearance of a scraper is 0.1mm, the winding speed is 6000mm/min, and heating and curing are carried out at 160 ℃ for 3 hours to obtain the carbon fiber rotor with the resin content of 25 wt%.
After 25000rpm overspeed test, the rotor diameter plastic deformation was 0.22mm.
In the above examples and comparative examples, the test time for the overspeed test was 2min, and it is desirable that the rotor diameter plastic deformation be less than 0.15mm, and more preferably less than 0.10 mm.
The above description is only an example of the present application, and the scope of the present application is not limited to the specific examples, but is defined by the claims of the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the technical idea and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. The motor rotor comprises a rotor core and a carbon fiber protective sleeve, wherein the carbon fiber protective sleeve is tightly attached to the outer side of the rotor core,
A plurality of grooves are formed on the outer side of the rotor core in the axial direction of the rotor core, and the grooves are arranged along the circumferential direction of the rotor core;
The carbon fiber protective sleeve comprises a multi-layer structure formed by winding carbon fiber bundles;
At least one part of carbon fiber bundles in the innermost layer are embedded in the groove;
The height of the embedded part of the carbon fiber bundles embedded in the grooves is at least one third of the diameter of the carbon fiber bundles.
2. The motor rotor of claim 1, wherein the width of the groove slot is smaller than the diameter of the carbon fiber bundle, and the depth of the groove is smaller than the diameter of the carbon fiber bundle.
3. The motor rotor according to claim 2, wherein the diameter of the carbon fiber bundle is 0.05-1mm, the width of the groove opening is 0.05-1mm, and the depth of the groove is 0.015-0.6mm.
4. A motor rotor according to claim 3, wherein the width of the groove slot is less than the maximum width of the groove.
5. The motor rotor of claim 1, wherein the carbon fiber bundles are twisted from a plurality of carbon fiber monofilaments.
6. The motor rotor of claim 1, wherein the carbon fiber protective sleeve further comprises a fiber cloth, the fiber cloth is closely attached to the rotor core, and the carbon fiber bundles are arranged on a surface of the fiber cloth away from the rotor core.
7. A method of manufacturing a rotor for an electric machine as claimed in claim 1, comprising the steps of:
S1, carrying out laser oxidation treatment on the inner surface of a groove of a formed rotor core;
s2, winding the carbon fiber bundles on the outer side of the rotor core treated by the S1, embedding all or part of the carbon fiber bundles positioned in the innermost layer into the grooves, wherein the height of the embedded parts is at least one third of the diameter of the carbon fiber bundles, and heating and curing to obtain the motor rotor.
8. The method of manufacturing a motor rotor according to claim 7, further comprising adding an adhesive to the carbon fiber bundles before step S2, the adhesive including an epoxy resin and a coupling agent, the coupling agent being added in an amount of 0.1 to 1wt%;
the coupling agent is an epoxy silane coupling agent or a tetrabutyl titanate coupling agent.
9. The method of manufacturing a motor rotor according to claim 7, wherein the conditions of the laser oxidation treatment in S1 are: the power of the laser is 100-1000W, the diameter of the laser beam is 0.05-1mm, the line interval is 0.05-0.2mm, the scanning speed is 500-3000mm/s, and the frequency is 15-25kHz;
the winding conditions of the carbon fiber bundles in S2 are as follows: the winding tension is 100-300N, the scraper gap is 0.05-0.15mm, and the winding speed is 5000-7000mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410032097.8A CN117543860B (en) | 2024-01-10 | 2024-01-10 | Motor rotor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410032097.8A CN117543860B (en) | 2024-01-10 | 2024-01-10 | Motor rotor and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117543860A CN117543860A (en) | 2024-02-09 |
| CN117543860B true CN117543860B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410032097.8A Active CN117543860B (en) | 2024-01-10 | 2024-01-10 | Motor rotor and manufacturing method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711981A (en) * | 2018-07-26 | 2018-10-26 | 珠海格力电器股份有限公司 | A kind of assembly method of rotor structure, motor and rotor structure |
| CN211063427U (en) * | 2019-12-10 | 2020-07-21 | 无锡市源昌机械制造有限公司 | Carbon fiber winding high-speed motor rotor |
| CN116455108A (en) * | 2022-12-23 | 2023-07-18 | 中国第一汽车股份有限公司 | Rotor assembly suitable for high-rotation-speed working condition and motor with same |
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2024
- 2024-01-10 CN CN202410032097.8A patent/CN117543860B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711981A (en) * | 2018-07-26 | 2018-10-26 | 珠海格力电器股份有限公司 | A kind of assembly method of rotor structure, motor and rotor structure |
| CN211063427U (en) * | 2019-12-10 | 2020-07-21 | 无锡市源昌机械制造有限公司 | Carbon fiber winding high-speed motor rotor |
| CN116455108A (en) * | 2022-12-23 | 2023-07-18 | 中国第一汽车股份有限公司 | Rotor assembly suitable for high-rotation-speed working condition and motor with same |
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| CN117543860A (en) | 2024-02-09 |
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