CN117691815A - Motor rotor and manufacturing method thereof - Google Patents
Motor rotor and manufacturing method thereof Download PDFInfo
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- CN117691815A CN117691815A CN202311700132.0A CN202311700132A CN117691815A CN 117691815 A CN117691815 A CN 117691815A CN 202311700132 A CN202311700132 A CN 202311700132A CN 117691815 A CN117691815 A CN 117691815A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 238000004804 winding Methods 0.000 claims abstract description 60
- 239000011241 protective layer Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 31
- 239000010410 layer Substances 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 7
- 238000010030 laminating Methods 0.000 claims abstract description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 41
- 239000004917 carbon fiber Substances 0.000 claims description 41
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 41
- 239000011347 resin Substances 0.000 claims description 28
- 229920005989 resin Polymers 0.000 claims description 28
- 238000007598 dipping method Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000004382 potting Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 13
- 238000002955 isolation Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Manufacture Of Motors, Generators (AREA)
Abstract
The application provides a motor rotor and a manufacturing method thereof, wherein the manufacturing method of the motor rotor comprises the following steps: laminating the silicon steel sheets in sections to form at least two sections of rotor cores; fixing magnetic steel between adjacent rotor cores, and fixing a plurality of rotor cores together to form a rotor frame; fixing the rotor frame, rotating the rotor frame to wind a layer of protection layer on the surface of the rotor frame under the condition that the temperature does not exceed the preset temperature, and stopping winding when the protection layer reaches the preset thickness; carrying out high-temperature curing on the rotor frame wound with the protective layer to obtain a motor rotor; according to the manufacturing method of the motor rotor, the whole winding process of the rotor is completed in a low-temperature environment with the temperature not exceeding the preset temperature, the rotor deformation can be reduced under the condition of low-temperature winding, the motor is enabled to achieve higher rotating speed, the air gap between the stator and the rotor of the motor is reduced, the motor performance is further improved, and the competitiveness of a product is effectively improved.
Description
Technical Field
The application belongs to the technical field of electric automobiles, relates to a motor, and particularly relates to a motor rotor and a manufacturing method thereof.
Background
Along with the rapid development of the domestic electric automobile industry, the requirements of the industry on the driving motor are also higher and higher. At present, the driving motor adopted in China mainly comprises a permanent magnet synchronous motor, after the rotating speed is increased, the existing rotor iron core is usually required to be designed with a thicker magnetism isolating bridge to resist centrifugal force generated by rotation, and the design can not only increase magnetic leakage of the motor and reduce the motor performance, but also restrict the increase of the rotating speed of the motor due to the strength of a rotor punching sheet.
Disclosure of Invention
The present application is directed to a motor rotor and a method for manufacturing the same, which are used for solving the problems indicated in the background art.
In a first aspect, the present application provides a method for manufacturing a motor rotor, where the method for manufacturing a motor rotor includes: laminating the silicon steel sheets in sections to form at least two sections of rotor cores; fixing magnetic steel between adjacent rotor cores, and fixing a plurality of rotor cores together to form a rotor frame; fixing the rotor frame, rotating the rotor frame to wind a layer of protection layer on the surface of the rotor frame under the condition that the temperature does not exceed a preset temperature, and stopping winding when the protection layer reaches a preset thickness; and carrying out high-temperature curing on the rotor frame wound with the protective layer to obtain the motor rotor.
In one implementation manner of the first aspect, the preset temperature is minus 35 °.
In an implementation manner of the first aspect, the obtaining a motor rotor includes: magnetizing the rotor frame wound with the protective layer after high-temperature curing to obtain the motor rotor.
In an implementation manner of the first aspect, the fixing the rotor frame, by rotating the rotor frame to wind a protective layer on a surface of the rotor frame under a condition that a preset temperature is not exceeded includes: after the surface of the rotor frame is cleaned, the centers of the two ends of the rotor frame are rotationally connected through a rotor fixing tool; after the relevant parameters of the winding equipment are adjusted, fixing the starting point of the carbon fiber yarn at the edge of the outer part of the rotor frame, and starting the winding equipment to continuously wind the carbon fiber yarn on the outer part of the rotor frame under the condition that the temperature does not exceed the preset temperature so as to form the protective layer.
In one implementation manner of the first aspect, the relevant parameters include at least one of a winding speed, a tension range and a winding angle, wherein the winding speed is 5m/min to 50m/min, the tension range is 1000Mpa to 2000Mpa, and the winding angle is 80 ° to 90 °.
In one implementation of the first aspect, the winding apparatus is disposed within a low temperature environmental chamber.
In one implementation manner of the first aspect, the winding device includes a middle rotating shaft, a dipping tank, a dipping mechanism, a tension adjuster and a winding roller, the dipping mechanism includes an upper roller and a lower roller, the upper roller and the lower roller are attached to each other on the surface, the lower roller is partially dipped in the dipping tank, liquefied resin is filled in the dipping tank, and the carbon fiber yarn passes through the middle rotating shaft, then passes through between the upper roller and the lower roller to dip the liquefied resin, and passes through the tension adjuster and the winding roller in sequence, and then winds outside the rotor frame.
In one implementation manner of the first aspect, the rotor fixing tool and the winding roller are both disposed in a low-temperature environment bin.
In one implementation manner of the first aspect, the fixing magnetic steel between adjacent rotor cores and fixing the plurality of rotor cores together to form the rotor frame includes: magnetic steel is fixedly arranged at two ends of a connecting groove formed by the adjacent rotor iron cores; and injecting or potting a resin material at a central position of the connection groove to form a connection layer, and embedding the resin material inside the adjacent rotor core to form the rotor frame.
In one implementation manner of the first aspect, the connecting groove is in a V-shaped structure.
In one implementation of the first aspect, the high temperature curing is at a temperature of 80 to 180 ° and the high temperature curing is for a time of 4 to 24 hours.
In one implementation of the first aspect, the high temperature curing of the rotor frame around which the protective layer is wound includes: and placing the rotor frame in a curing furnace for rotary curing so as to cure the protective layer on the surface of the rotor frame.
In a second aspect, the present application provides a motor rotor manufactured by the manufacturing method of the motor rotor, which includes a plurality of rotor cores, magnetic steel is disposed between adjacent rotor cores, the adjacent rotor cores are fixedly connected through a resin material to form a connecting layer and form a rotor frame, and a protective layer is covered on the outer wall of the rotor frame.
In one implementation manner of the second aspect, the rotor core includes an inner rotor core and at least one outer rotor core, the outer rotor core is disposed on an outer wall of the inner rotor core, connecting slots are disposed on the outer sides of the inner rotor core and the outer rotor core, the connecting layer is disposed at an intermediate position of the connecting slots, and the magnetic steel is disposed at two ends of the connecting layer.
In one implementation manner of the second aspect, the number of the outer rotor cores is two, and the connecting slots have a V-shaped structure.
As described above, the motor rotor and the manufacturing method thereof have the following beneficial effects:
(1) Compared with the prior art, the manufacturing method of the motor rotor provided by the application, wherein the whole winding process of the rotor is completed in a low-temperature environment which does not exceed the preset temperature, the rotor deformation can be reduced under the condition of low-temperature winding, the motor can achieve higher rotating speed, the motor stator and rotor air gap is reduced, the motor performance is further improved, and the competitiveness of products is effectively improved.
(2) The application utilizesThermal shrinkage and cold expansion of carbon fiber (thermal expansion coefficient of carbon fiber is-0.3X10) -6 ～-0.6×10 -6 ) By completing the winding process in a low temperature environment of not more than minus 35 DEG, the prestress of the protective layer is improved by utilizing the difference of the thermal expansion coefficients between the iron core and the protective layer of the carbon fiber yarn, and the protective layer is used for resisting the centrifugal force at high rotation speed.
(3) This application is in motor rotor's manufacturing process, through the spread groove intussuseption resin material that forms between adjacent rotor core forms the spread layer in order to be in the same place adjacent rotor core is fixed, simultaneously at the inside both ends installation magnet steel of spread groove, when guaranteeing rotor structural stability, has effectively reduced the magnetic leakage through canceling magnetism isolation bridge, twines one deck protective layer in the outside rotor frame simultaneously, can effectively reduce motor rotor's deformation volume under high-speed rotation, and then reduces the air gap of stator and rotor.
Drawings
Fig. 1 is a flowchart illustrating a method for manufacturing a motor rotor according to an embodiment of the present application.
Fig. 2 is a schematic structural view of a winding apparatus according to an embodiment of the present application.
Fig. 3 is a schematic structural view of a motor rotor according to an embodiment of the present application.
Fig. 4 is a schematic structural view of a rotor fixing tool and winding rollers arranged in a low-temperature environment cabin in the manufacturing method of the motor rotor.
Fig. 5 shows a graph of the change between normalized rotational speed and normalized thickness of a carbon fiber jacket.
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the present disclosure, when the following description of the present application is taken in conjunction with the accompanying drawings. The present application may be embodied or carried out in other specific embodiments, and the details of the present application may be modified or changed from various points of view and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that, the illustrations provided in the following embodiments merely illustrate the basic concepts of the application by way of illustration, and only the components related to the application are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
The thickness of the carbon fiber sheath of the permanent magnet motor rotor plays a decisive role in the performance of the motor, and the thinner the thickness of the carbon fiber is, the smaller the motor air gap is, and the magnetic resistance is reduced, so that the efficiency of magnetic field transmission is improved, and the torque output of the motor is increased. Meanwhile, the smaller the air gap of the motor is, the higher the counter electromotive force of the motor is, the higher the moment constant is, and the larger the torque of unit current is, so that the motor efficiency is improved. The thinner the jacket design, the better the motor performance.
For traditional carbon fiber sheath design, because of the influence of equipment input tension and the large centrifugal force of the rotor block design scheme under high speed, the thickness of the carbon fiber sheath is uneven (the winding tension of the normal temperature winding process is limited, and the deformation of the sleeve under high rotating speed is large, so that the thickness of the sleeve is increased). Because the carbon fiber sheath with a smaller thickness has poor rigidity, larger radial deformation occurs under high-speed rotation, and the risk of rotor sweeping exists; the thicker magnetic isolation bridge resists the centrifugal force generated by rotation, so that the design can not only increase the magnetic leakage of the motor and reduce the performance of the motor, but also restrict the improvement of the rotating speed of the motor due to the strength of the rotor punching sheet.
In order to ensure that the rotor sheath still has a high stiffness at a low thickness, it is necessary to raise the pre-tension as much as possible during the winding process; in this application, solved the poor problem of thinner thickness carbon fiber sheath rigidity through low temperature winding, realized on the basis that carbon fiber sheath has thinner thickness, still satisfied the rigidity demand.
See fig. 1-5. Compared with the prior art, the motor rotor and the manufacturing method thereof provided by the application have the advantages that the whole winding process of the rotor is uniformThe motor is completed in a low-temperature environment which does not exceed a preset temperature, the rotor deformation at a high rotating speed can be reduced by low-temperature winding, so that the motor is enabled to achieve a higher rotating speed, the stator and rotor air gap of the motor is reduced, the motor performance is further improved, and the competitiveness of the product is effectively improved; the application utilizes the thermal shrinkage and cold expansion of the carbon fiber (the thermal expansion coefficient of the carbon fiber is-0.3 multiplied by 10) -6 ～-0.6×10 -6 ) By completing the winding process in a low temperature environment of not more than minus 35 DEG, the prestress of the protective layer is improved by utilizing the difference of the thermal expansion coefficients between the iron core and the protective layer of the carbon fiber yarn, and the protective layer is used for resisting the centrifugal force at high rotating speed; in the manufacturing process of the motor rotor, resin materials are injected into the V-shaped connecting grooves formed between the adjacent rotor iron cores to form connecting layers so as to fix the adjacent rotor iron cores together, magnetic steel is arranged at two ends of the inner part of the connecting grooves, the stability of the rotor structure is guaranteed, meanwhile, magnetic flux leakage is effectively reduced by canceling a magnetic isolation bridge, and meanwhile, a protective layer is wound outside a rotor frame, so that the deformation of the motor rotor under high-speed rotation can be effectively reduced, and then the air gap between a stator and the rotor is reduced.
As shown in fig. 1, in an embodiment, a method for manufacturing a motor rotor of the present application includes:
s100, stacking the silicon steel sheets in sections to form at least two sections of rotor cores.
In this embodiment, the rotor core is formed by stacking a plurality of silicon steel sheets along the axial direction of the rotor shaft of the motor rotor, and the plurality of rotor cores are stacked together to form a cylindrical shape, so that the plurality of rotor cores can be fixed together later.
S200, fixing magnetic steel between the adjacent rotor cores, and fixing a plurality of rotor cores together to form a rotor frame.
In some embodiments, the step S200 includes:
magnetic steel is fixedly arranged at two ends of a connecting groove formed by the adjacent rotor iron cores;
and injecting or potting a resin material at a central position of the connection groove to form a connection layer, and embedding the resin material inside the adjacent rotor core to form the rotor frame;
in some embodiments, the connecting groove is V-shaped.
Specifically, after a plurality of rotor cores are obtained, the rotor cores are sequentially overlapped together according to the sequence from inside to outside, a V-shaped connecting groove is formed between the adjacent rotor cores, then magnetic steel is fixedly arranged at two ends inside the connecting groove and made of magnetic materials and used for providing a magnetic field for the whole motor rotor, so that the motor has higher matrix density and power density. After the magnetic steel is mounted, a resin material is injected at the center of the connecting groove to form a connecting layer, so that adjacent rotor cores are fixed together through the connecting layer to form a preliminary rotor frame. The injection method of the resin material includes injection molding or potting, and the present embodiment is not particularly limited.
And S300, fixing the rotor frame, and rotating the rotor frame to wind a layer of protection layer on the surface of the rotor frame under the condition that the temperature does not exceed the preset temperature, and stopping winding when the protection layer reaches the preset thickness.
It should be noted that, through wrapping up one deck high strength non-magnetic conduction sheath (i.e. protective layer) that has pretightning force outside the iron core, solved the rotor intensity problem under the high rotational speed, use low temperature (not exceeding preset temperature) winding sleeve (i.e. rotor frame) and injection molding or epoxy embedment rotor, reduced the thickness of sleeve, removed rotor magnetism-isolating bridge simultaneously, promoted high rotational speed motor's moment of torsion density and power density.
In some embodiments, the preset temperature is minus 35 °.
The high-strength and high-modulus sheath is wound at a low temperature of not more than minus 35 DEG, and the initial sheath prestress is improved by utilizing the difference of the thermal expansion coefficients of the iron core and the sheath, so that the high-strength and high-modulus sheath is used for resisting the centrifugal force at a high rotating speed; the motor rotor magnetic flux leakage condition can be greatly reduced, the motor performance is improved, meanwhile, rotor deformation can be reduced under high rotation speed due to low-temperature winding, the motor is enabled to achieve higher rotation speed, the motor stator and rotor air gap is reduced, the motor performance is further improved, and the competitiveness of products is effectively improved.
In some embodiments, the fixing the rotor frame by rotating the rotor frame to wind a protective layer on the surface of the rotor frame without exceeding a preset temperature includes:
after the surface of the rotor frame is cleaned, fixing the centers of two ends of the rotor frame through a rotor fixing tool, and starting the rotor fixing tool to drive the rotor frame to rotate at a preset rotating speed;
after the relevant parameters of the winding equipment are adjusted, fixing the starting point of the carbon fiber yarn at the edge of the outer part of the rotor frame, and starting the winding equipment to continuously wind the carbon fiber yarn on the outer part of the rotor frame under the condition that the temperature does not exceed the preset temperature so as to form the protective layer.
In this embodiment, after obtaining preliminary rotor frame, adopt alcohol to handle the rotor frame surface cleanly, afterwards adopt the fixed frock of rotor to fix the axial both ends of rotor frame, guarantee that the rotor frame can rotate along the fixed frock of rotor, afterwards set up the relevant parameter of winding equipment after, fix the starting point of carbon fiber yarn at the outward flange of rotor frame, start winding equipment with the carbon fiber yarn evenly twine in the rotor frame outside with the protective layer that forms corresponding thickness.
It should be noted that, since the silicon steel material has a thermal expansion coefficient of 11.6X10 -6 K, coefficient of thermal expansion of carbon fiber is-0.3X10 -6 ～-0.6×10 -6 The carbon fiber is wound at a low temperature, so that after the carbon fiber sheath is restored to the room temperature, the pretightening force of the sheath is increased due to the expansion of silicon steel and the shrinkage of the carbon fiber sheath, the rigidity of the sheath is improved, the thickness of the carbon fiber sheath can be reduced under the same technical requirement, and more excellent motor performance is brought; according to the method, the characteristic of thermal shrinkage and cold expansion of the carbon fiber is utilized, the winding process is completed in a low-temperature environment of not more than minus 35 DEG, and the prestress of the protective layer is improved by utilizing the difference of thermal expansion coefficients between the iron core and the protective layer of the carbon fiber yarn and is used for resisting the centrifugal force at a high rotating speed; at the same time, carbon fiberThe yarn protection layer also has the non-magnetic conduction characteristic, so that the magnetic leakage of the rotor can be reduced, and the motor performance can be improved.
As shown in fig. 5, the thickness difference of the carbon fiber in a certain rotating speed range under the same technical requirement at different temperatures is calculated through simulation, so that the thickness can be reduced by increasing the pretightening force of the carbon fiber sheath during low-temperature winding; specifically, at the same rotational speed, the lower the temperature, the thinner the carbon fiber thickness correspondingly.
It should be noted that the process of the simulation calculation method is as follows: firstly, establishing a jacket middle plane model in simulation software; dividing grids, and defining materials and thicknesses; the method comprises the steps of setting contact between a rotor iron core and magnetic steel and simultaneously setting contact between a sheath and the iron core; the temperature and the prestress of the sheath are defined, the maximum equivalent stress and the maximum radial displacement of the sheath are solved and extracted, and whether the thickness is feasible or not is judged.
In still other embodiments, the related parameters include at least one of a winding speed, a tension range, and a winding angle, the winding speed being 5m/min to 50m/min, the tension range being 1000Mpa to 2000Mpa, the winding angle being 80 to 90 °, the winding angle being an acute angle formed between a straight line where the carbon fiber yarn between the wound roller and the rotor frame is located and a horizontal direction.
In one embodiment, the winding angle is 89 °.
Further, referring to fig. 2, the winding apparatus 2 includes a middle rotating shaft 21, a dipping tank 22, a dipping mechanism 23, a tension adjuster 24 and a winding roller 25, the dipping mechanism 23 includes an upper roller 231 and a lower roller 232, the upper roller 231 and the lower roller 232 are surface-bonded, the lower roller portion 232 is dipped inside the dipping tank 22, the inside of the dipping tank 22 is filled with liquefied resin, and the carbon fiber yarn passes between the upper roller 231 and the lower roller 232 after passing through the middle rotating shaft 21 to infiltrate the liquefied resin, and passes through the tension adjuster 24 and the winding roller 25 in sequence to be wound outside the rotor frame.
Wherein, the carbon fiber yarn of rolling is after passing through the middle rotating shaft 21, between upper portion roller 231 and lower portion roller 232, because upper portion roller 231 and lower portion roller 232 are the mutual rotation, the liquefied resin of the inside of gum dipping tank 22 is constantly adsorbed on lower portion roller 232 surface, the carbon fiber yarn is stained with liquefied resin when passing between upper portion roller 231 and lower portion roller 232, afterwards, evenly twine at the outer wall of rotor frame through tension regulator 24 and winding gyro wheel 25 in proper order, thereby just can evenly twine the protective layer that one deck carbon fiber yarn constitutes in the rotor frame outside, and the liquefied resin that carbon fiber yarn surface stained with can strengthen whole protective layer's intensity after follow-up solidification, strengthen the intensity of the motor rotor after the shaping.
As shown in fig. 2 and 4, in one embodiment, the liquefied resin in the dipping tank 22 is a special low-temperature resin; specifically, the low-temperature resin is uniformly infiltrated into the carbon fiber yarn by the infiltration mechanism 23, and the low-temperature state is maintained throughout the infiltration process to ensure that the resin can completely infiltrate into the fiber and to provide good strength and rigidity.
In some embodiments, referring to fig. 4, the rotor securing tooling and the winding roller 25 are both disposed within the low temperature environmental chamber 4.
In still other embodiments, referring to fig. 2, the entire winding apparatus is disposed within a low temperature ambient bin, the temperature within the low temperature ambient bin 4 being below the solidification temperature of the liquefied resin.
In one embodiment, the temperature of the low temperature ambient bin is no more than about minus 35 °.
S400, carrying out high-temperature curing on the rotor frame wound with the protective layer to obtain the motor rotor.
In some embodiments, the high temperature cure is at a temperature of 80 to 180 ° and the high temperature cure is for a time of 4 to 24 hours.
In some embodiments, the high temperature curing of the rotor frame around which the protective layer is wound comprises: and placing the rotor frame in a curing furnace for rotary curing so as to cure the protective layer on the surface of the rotor frame.
In some embodiments, the resulting motor rotor comprises: magnetizing the rotor frame wound with the protective layer after high-temperature curing to obtain the motor rotor.
It should be noted that, the protection scope of the method for manufacturing the motor rotor described in the present application is not limited to the execution sequence of the steps listed in the present embodiment, and all the schemes implemented by adding or removing steps and replacing steps according to the prior art made by the principles of the present application are included in the protection scope of the present application.
The application also provides a motor rotor based on the motor rotor manufacturing method, referring to fig. 3, the motor rotor comprises a plurality of rotor cores, magnetic steel 32 is arranged between adjacent rotor cores, the adjacent rotor cores are fixedly connected through a resin material forming connecting layer 33 and form a rotor frame, and a protective layer 34 is covered on the outer wall of the rotor frame.
In some embodiments, the rotor core includes an inner rotor core 31 and at least one outer rotor core 35, the outer rotor core 35 is disposed on an outer wall of the inner rotor core 31, and connection slots 36 are disposed on an outer portion of the inner rotor core 31 and the outer rotor core 35, the connection layer 33 is disposed at a middle position of the connection slots 36, and the magnetic steel 32 is disposed at both ends of the connection layer 34.
Wherein, the connection layer 33 is made of a resin material having high adhesive strength so as to connect the outer rotor core 35 and the inner rotor core 31 together, thereby securing stability thereof. When a plurality of outer rotor cores 35 are provided, the connection structure between adjacent outer rotor cores 35 is the same as the connection between inner rotor core 31 and outer rotor core 35, and will not be described here again.
Illustratively, the number of the outer rotor cores 35 is two, and the connecting grooves 36 have a V-shaped structure, so that the V-shaped magnetic steel is formed, and the thickness of the protective layer 34 is reduced while the stability of the whole structure is ensured.
The descriptions of the processes or structures corresponding to the drawings have emphasis, and the descriptions of other processes or structures may be referred to for the parts of a certain process or structure that are not described in detail.
The foregoing embodiments are merely illustrative of the principles of the present application and their effectiveness, and are not intended to limit the application. Modifications and variations may be made to the above-described embodiments by those of ordinary skill in the art without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications and variations which may be accomplished by persons skilled in the art without departing from the spirit and technical spirit of the disclosure be covered by the claims of this application.
Claims (15)
1. The manufacturing method of the motor rotor is characterized by comprising the following steps of:
laminating the silicon steel sheets in sections to form at least two sections of rotor cores;
fixing magnetic steel between adjacent rotor cores, and fixing a plurality of rotor cores together to form a rotor frame;
fixing the rotor frame, rotating the rotor frame to wind a layer of protection layer on the surface of the rotor frame under the condition that the temperature does not exceed a preset temperature, and stopping winding when the protection layer reaches a preset thickness;
and carrying out high-temperature curing on the rotor frame wound with the protective layer to obtain the motor rotor.
2. The method of claim 1, wherein the predetermined temperature is-35 °.
3. The method of claim 1, wherein the obtaining the motor rotor comprises: magnetizing the rotor frame wound with the protective layer after high-temperature curing to obtain the motor rotor.
4. A method of manufacturing a rotor for an electric machine according to any one of claims 1 to 3, wherein said fixing the rotor frame by rotating the rotor frame to wind a protective layer on the surface of the rotor frame without exceeding a preset temperature comprises:
after the surface of the rotor frame is cleaned, the centers of the two ends of the rotor frame are rotationally connected through a rotor fixing tool;
after the relevant parameters of the winding equipment are adjusted, fixing the starting point of the carbon fiber yarn at the edge of the outer part of the rotor frame, and starting the winding equipment to continuously wind the carbon fiber yarn on the outer part of the rotor frame under the condition that the temperature does not exceed the preset temperature so as to form the protective layer.
5. The method of claim 4, wherein the parameters include at least one of a winding speed, a tension range, and a winding angle, the winding speed is 5m/min to 50m/min, the tension range is 1000Mpa to 2000Mpa, and the winding angle is 80 ° to 90 °.
6. The method of claim 4, wherein the winding apparatus is disposed in a low temperature environment chamber.
7. The method according to claim 4, wherein the winding device comprises a middle rotating shaft, a dipping tank, a dipping mechanism, a tension adjuster and a winding roller, the dipping mechanism comprises an upper roller and a lower roller, the upper roller and the lower roller are attached to each other, the lower roller is partially dipped in the dipping tank, liquefied resin is filled in the dipping tank, and the carbon fiber yarn passes through the middle rotating shaft, then passes through the space between the upper roller and the lower roller to dip the liquefied resin, and passes through the tension adjuster and the winding roller in sequence, and then is wound outside the rotor frame.
8. The method of claim 7, wherein the rotor fixing tool and the winding roller are both disposed in a low temperature environment chamber.
9. The method of manufacturing a rotor for an electric machine according to claim 1, wherein said fixing magnetic steel between adjacent ones of said rotor cores and fixing a plurality of said rotor cores together to form a rotor frame comprises:
magnetic steel is fixedly arranged at two ends of a connecting groove formed by the adjacent rotor iron cores;
and injecting or potting a resin material at a central position of the connection groove to form a connection layer, and embedding the resin material inside the adjacent rotor core to form the rotor frame.
10. The method of claim 9, wherein the connecting grooves are V-shaped.
11. The method of claim 1, wherein the high temperature curing is performed at a temperature of 80 to 180 ° and the high temperature curing is performed for a time of 4 to 24 hours.
12. The method of claim 1, wherein the high temperature curing of the rotor frame around which the protective layer is wound comprises: and placing the rotor frame in a curing furnace for rotary curing so as to cure the protective layer on the surface of the rotor frame.
13. An electric motor rotor based on the manufacturing method of the electric motor rotor as set forth in any one of claims 1 to 12, characterized by comprising a plurality of rotor cores, magnetic steel is arranged between adjacent rotor cores, the adjacent rotor cores are fixedly connected through a resin material forming connection layer and form a rotor frame, and the outer wall of the rotor frame is covered with a protective layer.
14. The motor rotor according to claim 13, wherein the rotor core includes an inner rotor core and at least one outer rotor core, the outer rotor core is disposed on an outer wall of the inner rotor core, and the inner rotor core and the outer rotor core are each provided with a connection groove outside, the connection layer is disposed at an intermediate position of the connection groove, and the magnetic steel is disposed at both ends of the connection layer.
15. The motor rotor of claim 13, wherein the number of the outer rotor cores is two, and the connection groove has a V-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311700132.0A CN117691815A (en) | 2023-12-12 | 2023-12-12 | Motor rotor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311700132.0A CN117691815A (en) | 2023-12-12 | 2023-12-12 | Motor rotor and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117691815A true CN117691815A (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311700132.0A Pending CN117691815A (en) | 2023-12-12 | 2023-12-12 | Motor rotor and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117691815A (en) |
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2023
- 2023-12-12 CN CN202311700132.0A patent/CN117691815A/en active Pending
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