CN113612326B - Double-air-gap motor rotor structure - Google Patents
Double-air-gap motor rotor structure Download PDFInfo
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- CN113612326B CN113612326B CN202110894563.XA CN202110894563A CN113612326B CN 113612326 B CN113612326 B CN 113612326B CN 202110894563 A CN202110894563 A CN 202110894563A CN 113612326 B CN113612326 B CN 113612326B
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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
- H02K1/2793—Rotors axially facing stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/12—Transversal flux machines
Abstract
The invention provides a double-air-gap motor rotor structure which comprises a retainer, a magnetic conduction assembly, an axial limiting nail and a ring assembly, wherein the retainer is provided with a radial limiting piece, the magnetic conduction assembly is provided with a plurality of magnetic conduction blocks, the magnetic conduction blocks are fixed between the radial limiting piece and the ring assembly, the ring assembly comprises an inner ring and an outer ring, the inner ring is an auxiliary ring which does not have a fiber bundle regular arrangement structure, the outer ring is a stressed ring which has a fiber bundle regular arrangement structure, a fixing hole is formed in the inner ring, the outer ring is bound to the outer side of the inner ring along the circumferential direction of a rotor, one end of the axial limiting nail is inserted into the fixing hole, the other end of the axial limiting nail is inserted into the retainer or/and the magnetic conduction block, compared with the prior art, the fixing effect on the magnetic conduction block due to glue failure is avoided, in addition, the outer ring which has the fiber bundle regular arrangement structure does not need to be perforated, the strength of the axial limiting nail is influenced, and the fixing effect on the magnetic conduction block is further improved.
Description
Technical Field
The invention relates to the field of disk motors, in particular to a double-air-gap motor rotor structure.
Background
The motor is an electromagnetic device for realizing electric energy conversion or transmission according to an electromagnetic induction law, and the motor is mainly used for generating driving torque and serving as a power source of electric appliances or various machines. The motor comprises a stator and a rotor, wherein the stator is an electric stationary part and mainly comprises a stator iron core and a stator winding, and the stator is used for generating a rotating magnetic field so that the rotor is cut by magnetic lines of force in the magnetic field to generate current.
The motor can be divided into a radial magnetic field motor and an axial magnetic field motor, the axial magnetic field motor is also called a disk motor, and the axial magnetic field motor has the characteristics of small volume, light weight, short axial size, high power density and the like, can be used in most thin installation occasions, and is widely used. The existing rotor generally comprises a retainer, a protection ring and magnetic steel, wherein the periphery of the retainer is provided with a plurality of clamping grooves, the magnetic steel is clamped with the retainer through the clamping grooves, and the outer periphery of the magnetic steel is sleeved with the protection ring so as to fix the magnetic steel.
The disk type motor rotor disk can be divided into a single-air-gap rotor disk and a double-air-gap rotor disk, for example, CN201820928635.1 is a single-air-gap rotor disk, and the single-air-gap rotor disk only needs to be provided with a single-side air gap and has a structure of a magnetic iron back, so that the design space of the rotor disk is large, and magnetic steel and other components are convenient to fix.
CN201821895450.1 discloses a double-air-gap rotor disc of a disc motor, in which, because of the need to set a double air gap, only a middle retainer of the whole rotor disc realizes the fixation of magnetic steel and other components, and the design space is small. In the traditional process, the magnetic steel can be preliminarily fixed through the magnetic steel, a groove convex structure on the retainer and the retaining ring, and then the retainer, the magnetic steel and the retaining ring are further fixed through glue. However, when the rotor rotates at a high speed, the glue is easy to loosen and fail, and the position of the retaining ring is offset as a result, so that the motor fails.
CN201910091883.4 discloses a dual air gap rotor disc for a disc motor, in which an attempt is made to solve the problem of position offset of a retaining ring, but the retaining ring is generally formed by winding a fiber material to improve the tensile strength of the retaining ring, and when an attempt is made to form a hole in the retaining ring, the strength of the retaining ring is greatly reduced.
Disclosure of Invention
In order to solve the problems, the invention provides a double-air-gap motor rotor structure of rotor magnetic steel, which can prevent the magnetic steel from shaking and falling off and ensure the reliable operation of a rotor.
The utility model provides a two air gap motor rotor structure, includes a holder, a magnetic conduction subassembly, a plurality of axial stop pin and a ring subassembly, the holder has a radial locating part, the magnetic conduction subassembly has a plurality of magnetic conduction pieces, and is a plurality of magnetic conduction pieces are the annular and arrange, and are fixed in radial locating part with between the ring subassembly, the ring subassembly includes an inner ring and an outer loop, the inner ring is the auxiliary ring that the non-has tow regular spread structure, the outer loop is for having tow regular spread structure's atress ring, the fixed orifices has been seted up on the inner ring, the outer loop is in the inner ring outside along rotor circumference constraint, axial stop pin one end is inserted the fixed orifices, the other end insert the holder or/with in the magnetic conduction piece.
As a preferred technical scheme, the outer ring is formed by winding carbon fiber rings, and the inner ring is made of a metal material.
As a preferred technical solution, the retainer further has a plurality of circumferential position-limiting members, and the plurality of circumferential position-limiting members are arranged along the circumferential direction of the rotor and are connected to the radial position-limiting members in an outwardly extending manner, so that the circumferential position-limiting members and the magnetic conductive blocks are arranged at intervals.
As a preferred technical solution, the circumferential limiting member abuts against the magnetic conductive block and forms a limiting channel, and the axial limiting nail is held in the limiting channel to prevent the magnetic conductive block from moving axially along the rotor.
As a preferred technical solution, the circumferential limiting part is provided with a first groove, the magnetic conducting block is provided with a second groove, and when the magnetic conducting block abuts against the circumferential limiting part, the first groove is opposite to the second groove and forms the limiting channel.
Preferably, the axial stopper pin is radially abutted between the radial stopper and the outer ring along the rotor.
As a preferred technical scheme, the axial limiting nail and the limiting channel are in interference fit.
As the preferred technical scheme, the holder includes the first substrate of multilayer, and the multilayer first substrate just is coincide hot pressing along the rotor axial and forms the holder, magnetic conduction piece includes the not magnetic conduction piece of equidimension of multilayer, magnetic conduction piece is the arc, and the multilayer magnetic conduction piece is along the radial and mode that progressively enlarges with the size of rotor by the coincide hot pressing formation magnetic conduction piece.
Compared with the prior art, the technical scheme has the following advantages:
the radial limiting piece and the ring assembly are fixed at two radial ends of the magnetic conduction block so as to radially fix the magnetic conduction block; the magnetic conduction blocks are fixed between two adjacent circumferential limiting parts to perform circumferential fixing; and utilize axial spacing nail with the magnetic conduction piece cooperation to prevent axial displacement takes place for the magnetic conduction piece, so not only simple structure is novel, effectively promotes the fixed effect of magnetic conduction piece in addition, avoids appearing rocking and the phenomenon that drops and influence the rotor performance. In addition, the ring subassembly includes radially and from interior to exterior arrangement's inner ring and outer loop along the rotor, and the outer loop exerts the binding power to the inner ring to prevent that the rotor from taking place stress deformation at high-speed centrifugal rotation in-process, avoid the inner ring to take place to become invalid to the radial fixed effect of magnetic conduction piece. Compared with the prior art, the fixing effect on the magnetic conduction block is prevented from being influenced due to the fact that glue is invalid, in addition, holes do not need to be formed in the outer ring with the fiber bundle regular arrangement structure, the strength of the outer ring is influenced, the fixing effect of the ring assembly on the magnetic conduction block is further improved, the magnetic conduction block is effectively prevented from shaking and falling, and the performance and the reliable operation of the rotor are improved. And the holder is formed by the hot pressing and overlapping of a plurality of layers of first base materials, and the magnetic conduction block is formed by overlapping the magnetic conduction sheets with different sizes in a mode of gradually increasing the size, so that the forming is convenient and quick, the magnetic conduction performance is improved, the industrialized batch production is facilitated, the structure is simple and novel, and the cost is effectively reduced.
The invention is further described with reference to the following figures and examples.
Drawings
FIG. 1 is a schematic structural diagram of a rotor structure of a double-air-gap motor according to the present invention;
FIG. 2 is a schematic view of the cage of the present invention;
FIG. 3 is a schematic structural view of the magnetic conductive assembly according to the present invention;
FIG. 4 is a schematic structural view of the inner ring of the present invention;
FIG. 5 is a schematic view of the cage, the magnetically permeable assembly and the inner ring assembly of the present invention;
FIG. 6 is a schematic view of the yoke of the present invention after cutting;
FIG. 7 is a schematic view of the structure of the magnetic conductive block of the present invention;
FIG. 8 is a schematic structural diagram of a first substrate according to the present invention;
fig. 9 is a schematic structural view of the circumferential limiting member according to the present invention;
FIG. 10 is a schematic view of a second substrate according to the present invention;
fig. 11 is a flowchart of a method for forming a rotor structure of a double-air-gap motor according to the present invention.
In the figure: 100 holders, 110 radial position limiters, 120 circumferential position limiters, 121 first grooves, 130 embedding parts, 200 magnetic conduction assemblies, 210 magnetic conduction blocks, 211 second grooves, 220 yoke parts, 300 ring assemblies, 310 inner rings, 311 fixing holes, 320 outer rings, 400 axial position limiting nails, 1000 first base materials, 1100 radial position limiting parts, 1200 circumferential position limiting parts, 1201 upper position limiting areas, 1202 middle recessed areas, 1203 lower position limiting areas, 2000 second base materials, 2100 magnetic conduction sheets, 2110 recessed parts and 2200 yoke parts.
Detailed Description
The following description is provided to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
As shown in fig. 1 to 6, the rotor structure of a dual-air-gap motor includes a holder 100, a magnetic conductive assembly 200, a plurality of axial limit pins 400, and a ring assembly 300, where the holder 100 has a radial limit piece 110, the magnetic conductive assembly 200 has a plurality of magnetic conductive blocks 210, the plurality of magnetic conductive blocks 210 are arranged in a ring shape and fixed between the radial limit piece 110 and the ring assembly 300, the ring assembly 300 includes an inner ring 310 and an outer ring 320, the inner ring 310 is an auxiliary ring that does not have a structure for regularly arranging fiber bundles, the outer ring 320 is a stressed ring that has a structure for regularly arranging fiber bundles, the inner ring 310 is provided with a fixing hole 311, the outer ring 320 is bound outside the inner ring 310 along the circumferential direction of the rotor, one end of the axial limit pin 400 is inserted into the fixing hole 311, and the other end is inserted into the holder 100 or/or the magnetic conductive blocks 210.
The radial limiting part 110 and the ring assembly 300 respectively correspond to two radial ends of the magnetic conductive block 210 to radially fix the magnetic conductive block 210, so as to prevent the magnetic conductive block 210 from radially moving, and the axial limiting nail 400 is limited by the magnetic conductive block 210 to prevent the magnetic conductive block 210 from axially moving, so that the fixing effect on the magnetic steel is effectively improved. And the ring assembly 300 comprises an inner ring 310 and an outer ring 320 which are arranged along the radial direction of the rotor from inside to outside, the outer ring 320 applies a binding force to the inner ring 310 to prevent the inner ring 310 from generating stress deformation during the high-speed centrifugal rotation of the rotor, and the radial fixing effect of the inner ring 310 to the magnetic conduction block 210 is prevented from being invalid. Compared with the prior art, the fixing effect on the magnetic conduction block 210 is prevented from being influenced by glue failure, in addition, the outer ring 320 with the fiber bundle regular arrangement structure is not required to be perforated, the strength of the outer ring 320 is influenced, the fixing effect of the ring assembly 300 on the magnetic conduction block 210 is further improved, the magnetic conduction block 210 is effectively prevented from shaking and falling, and the rotor performance and the reliable operation are improved.
The outer ring 320 is formed by winding a carbon fiber ring, and the inner ring 310 is made of a metal or glass fiber material. It can be seen that the strength of the inner ring 310 is higher than that of the outer ring 320, and the fixing holes 311 can be formed thereon to fix the axial direction limiting pins 400.
Specifically, the carbon fibers are cured with a binder, which may be glue, to form the outer ring 320. The carbon fiber has the characteristics of high temperature resistance, friction resistance, corrosion resistance and the like, so that the strength of the outer ring 320 is effectively improved, the outer ring 320 is prevented from being damaged, and the service life of the outer ring 320 is prolonged
In one embodiment, one end of the axial limiting nail 400 is inserted into the fixing hole 311, and the other end is inserted into the magnetic conductive block 210. That is, the axis limiting nail 400 limits the magnetic conduction block 210, so as to prevent the magnetic conduction block 210 from moving axially.
In another embodiment, one end of the axial stopper pin 400 is inserted into the fixing hole 311, and the other end is inserted into the holder 100. The axial stopper 400 serves to fix the inner ring 310.
In another embodiment, one end of the axial limiting pin 400 is inserted into the fixing hole 311, and the other end is inserted into the holder 100 and the magnetic conductive block 210. The axial stopper 400 not only plays a role of fixing the inner ring 310, but also limits the magnetic conductive block 210 to prevent the magnetic conductive block 210 from moving axially. The structure of the axial limit pin 400 respectively engaged with the holder 100 and the magnetic conductive block 210 is developed in detail as follows: as shown in fig. 1 to fig. 6, the retainer 100 further has a plurality of circumferential stoppers 120, the circumferential stoppers 120 are arranged along the circumferential direction of the rotor and are connected to the radial stoppers 110 in an outwardly extending manner, so that the circumferential stoppers 120 and the magnetic conductive blocks 210 are arranged at intervals.
Specifically, the circumferential position-limiting members 120 are respectively retained at two ends of each magnetic conduction block 210 along the circumferential direction of the rotor, and the magnetic conduction blocks 210 are abutted between the two circumferential position-limiting members 120, so that the circumferential position-limiting members 120 circumferentially fix the magnetic conduction blocks 210, so as to prevent the magnetic conduction blocks 210 from moving along the circumferential direction of the rotor.
As shown in fig. 1 to 6, the fixing structure of the rotor magnetic steel further includes a plurality of axial limiting nails 400, the circumferential limiting piece 120 abuts against the magnetic conductive block 210 and forms a limiting channel, and the axial limiting nails 400 are retained in the limiting channel to prevent the magnetic conductive block 210 from moving along the axial direction of the rotor. Therefore, the structure is simple and novel, the fixing effect of the magnetic conduction block 210 is effectively improved, and the phenomenon that the rotor performance is influenced by shaking and falling is avoided.
Preferably, the axial limit pin 400 is in interference fit with the limit channel. So that the axial limiting nail 400 and the limiting channel are tightly matched to prevent the axial limiting nail 400 from being displaced after being matched with the limiting channel, and further the service performance of the axial limiting nail 400 is influenced.
As shown in fig. 2 and fig. 3, the circumferential limiting member 120 is provided with a first groove 121, the magnetic conductive block 210 is provided with a second groove 211, and when the magnetic conductive block 210 abuts against the circumferential limiting member 120, the first groove 121 is opposite to the second groove 211 to form the limiting channel.
Specifically, circumference locating part 120 along rotor circumference's both sides, it has seted up respectively first recess 121, magnetic conduction block 210 along second recess 211 has been seted up respectively to rotor circumference's both sides, so that magnetic conduction block 210 imbeds in two behind the circumference locating part 120, magnetic conduction block 210 along rotor circumference's both sides form respectively spacing passageway, every promptly magnetic conduction block 210 corresponds two respectively axial stop peg 400, and two axial stop peg 400 is located separately magnetic conduction block 210 circumference's both sides, further avoid magnetic conduction block 210 takes place axial displacement.
More specifically, the axial stopper pin 400 is partially embedded in the first groove 121 and partially embedded in the second groove 211, so as to prevent the magnetic conductive block 210 from moving axially. Wherein the axial stop nail 400 is adapted to the cross-sectional shape of the stop channel, and may be circular, square, triangular, or the like, again without limitation. In addition, the cross-sectional shape of the first groove 121 and the cross-sectional shape of the second groove 211 combined relatively are the same as those of the limiting channel, for example, a circular shape is taken as an example, the cross-sectional shapes of the first groove 121 and the second groove 211 are both semicircular, and the first groove 121 and the second groove 211 are combined to form the limiting channel with the circular cross-sectional shape, wherein the cross-sectional areas of the first groove 121 and the second groove 211 can be the same, and certainly, the cross-sectional area of the second groove 211 can be larger than that of the first groove 121, so that the contact area between the axial limiting nail 400 and the magnetic conductive block 210 is increased, and the fixing effect of the axial limiting nail 400 on the axial movement of the magnetic conductive block 210 is improved.
As shown in fig. 1 to 5, a plurality of fixing holes 311 are formed on the inner ring 310, each fixing hole 311 is respectively opposite to one of the limiting channels, and the axial limiting nail 400 is inserted into the limiting channel through the fixing hole 311.
The inner ring 310 is not only radially fixed to the magnetic conductive block 210 by the radial position-limiting member 110, but also is provided with the fixing hole 311 so that the axial position-limiting nail 400 passes through the fixing hole, and the axial position-limiting nail 400 is further inserted and fixed to the ring assembly 300. In addition, the inner ring 310 is abutted to the outer side of the circumferential limiting member 120, and the inner ring 310 may be made of glass fiber or other materials, and has the characteristics of insulation, strong heat resistance, good corrosion resistance and the like, so as to prolong the service life of the inner ring 310.
As shown in fig. 1, the outer ring 320 is sleeved outside the inner ring 310 and fixes the axial stopper 400. Wherein the axial stop pin 400 abuts between the radial stop 110 and the outer ring 320 along the radial direction of the rotor.
Specifically, referring to fig. 2, one end of the first groove 121 extends to an end surface where the circumferential limiting member 120 is connected to the radial limiting member 110, and the other end extends to an end surface where the circumferential limiting member 120 is sleeved with the inner ring 310, referring to fig. 3, the second groove 211 extends to two radial ends of the magnetic conductive block 210, so that the axial limiting nail 400 is held behind a limiting channel formed by the first groove 121 and the second groove 211, and under the action of the outer ring 320, the axial limiting member 400 is abutted and fixed between the radial limiting member 110 and the outer ring 320.
The outer ring 320 not only fixes the axial limit pin 400, but also further prevents the inner ring 310 from being deformed by stress, thereby preventing the radial fixing effect of the inner ring 310 on the magnetic conductive block 210 from being invalid.
The magnetic conductive blocks 210, the circumferential position limiter 120, the inner ring 310, and the outer ring 320 are kept consistent in size along the axial direction of the rotor, and are thin, so that a fixing structure of the rotor magnetic steel shown in fig. 1 is formed.
As shown in fig. 1, the dimension of the outer ring 320 in the radial direction of the rotor is larger than the dimension of the inner ring 310 in the radial direction of the rotor, so as to improve the overall strength of the outer ring 320, and further improve the fixing effect of the outer ring 320 on the inner ring 310 and the axial stopper pin 400, respectively. Preferably, a dimension of the outer ring 320 in the radial direction of the rotor is 1.5 times or more a dimension of the inner ring 310 in the radial direction.
As shown in fig. 1, 8 and 9, the retainer 100 includes a plurality of first base materials 1000, and the plurality of first base materials 1000 are stacked and hot-pressed in the axial direction of the rotor to form the retainer 100. By adopting the overlapping mode, the strength of the retainer 100 is improved, and the industrial batch production is facilitated.
Referring to fig. 8, the first substrate 1000 has a radial position-limiting portion 1100 and a circumferential position-limiting portion 1200, the radial position-limiting portions 1100 of the plurality of layers of the first substrate 1000 are stacked and hot-pressed to form the radial position-limiting member 110, and the circumferential position-limiting portions 1200 of the plurality of layers of the first substrate 1000 are stacked and hot-pressed to form the circumferential position-limiting member 120. The first base material 1000 may be made of a composite material, and multiple layers of the first base material 1000 are stacked and fixed by hot melting under hot pressing, where the first base material 1000 may have self-adhesive property, or an adhesive is coated between two adjacent layers of the first base material 1000 to achieve hot melting stacking.
The radial limiting portion 110 is circular, so that the radial limiting portion 110 is formed by stacking and is cylindrical, and at this time, the magnetic conduction block 210 abuts against the outer side wall of the radial limiting portion 110. The plurality of circumferential limiting parts 1200 are spaced and connected to the outer periphery of the radial limiting part 110, and one side (i.e., the outer side) of the circumferential limiting part 1200 away from the radial limiting part 1100 is arc-shaped, so that the outer side of the circumferential limiting part 120 formed by overlapping is arc-shaped, and the inner ring 310 is annular in shape and is adapted to be installed. An embedding portion 130 for embedding the magnetic conductive block 210 is formed between two adjacent circumferential position-limiting members 120, and referring to fig. 2, the shape of the embedding portion 130 is the same as that of the magnetic conductive block 210.
Referring to fig. 9, the circumferential limiting member 120 has an upper limiting region 1201, a middle recessed region 1202 and a lower limiting region 1203 which are arranged along the axial direction, and the width of the circumferential limiting portion 1200 located in the middle recessed region 1202 is smaller than the width of the circumferential limiting portion 1200 located in the upper limiting region 1202 and the lower limiting region 1203, respectively, so that the middle recessed region 1202 forms the first groove 121.
Specifically, the width of the circumferential limiting portion 1200 refers to the size of the circumferential limiting portion in the circumferential direction of the rotor, and due to the above structure, two sides of the middle recessed area 1202 are recessed inward respectively, so as to form the first grooves 121 respectively disposed on two circumferential sides of the circumferential limiting member 120. It can be seen that the circumferential limiting part 1200 located in the central recessed area 1202 is reduced in width to form the structure of the circumferential limiting member 120 shown in fig. 9.
More specifically, the width of the circumferential stopper portion 1200 located in the upper stopper region 1202 is equal to the width of the circumferential stopper portion 1200 located in the lower stopper region 1203. In addition, the upper limiting region 1202 and the lower limiting region 1203 have the same size in the rotor axial direction, so that the first groove 121 is maintained at the intermediate position of the circumferential limiting member 120 in the rotor axial direction.
As shown in fig. 7, the magnetic block 210 includes a plurality of layers of magnetic conductive sheets 2100 with different sizes, and the plurality of layers of magnetic conductive sheets 2100 are stacked in a manner of increasing size along a radial direction of the rotor to form the magnetic block 210. The plurality of magnetic conductive sheets 2100 are arc-shaped sheets, and the magnetic conductive sheets 2100 may also be made of a composite material, and the magnetic conductive blocks 210 are formed by laminating a plurality of layers of the magnetic conductive sheets 2100 by using viscosity. By adopting the overlapping mode, the strength and the magnetic conductivity of the magnetic conduction block 210 are improved, and the industrialized mass production is facilitated.
The plurality of the magnetic conductive plates 2100 have the same size in the axial direction and the radial direction of the rotor, and have the gradually increased size in the circumferential direction of the rotor, so that the magnetic conductive blocks 210 formed by overlapping are fan-shaped to fit the fitting portions 130 in the shape of a fan. And the two radial ends of the magnetic conductive block 210 are arc-shaped respectively to adapt to the outer side wall of the radial limiting part 1100 which is a curved surface and the annular inner ring 310.
With reference to fig. 7, the magnetic conductive plates 2100 are respectively provided with recessed portions 2110 along two sides of the rotor circumferential direction, so that the recessed portions 2110 on the plurality of magnetic conductive plates 2100 form the second grooves 211.
In summary, the radial limiting member 110 and the ring assembly 300 are fixed at two radial ends of the magnetic conducting block 210, so as to radially fix the magnetic conducting block 210; the magnetic conductive block 210 is fixed between two adjacent circumferential position-limiting pieces 120 for circumferential fixing; and utilize axial stop pin 400 with magnetic conduction piece 210 cooperation is in order to prevent magnetic conduction piece 210 from taking place axial displacement, so not only simple structure is novel, effectively promotes magnetic conduction piece 210's fixed effect still, avoids appearing rocking and the phenomenon that drops and influence the rotor performance. In addition, the ring assembly 300 comprises an inner ring 310 and an outer ring 320 which are arranged along the radial direction of the rotor from inside to outside, and the outer ring 320 applies a binding force to the inner ring 310 to prevent the inner ring 310 from being deformed by stress during the high-speed centrifugal rotation of the rotor, so as to avoid the failure of the radial fixing effect of the inner ring 310 on the magnetic conductive blocks 210. Compared with the prior art, the fixing effect on the magnetic conduction block 210 is prevented from being influenced by glue failure, in addition, the outer ring 320 with the fiber bundle regular arrangement structure is not required to be perforated, the strength of the outer ring 320 is prevented from being influenced, the fixing effect of the ring assembly 300 on the magnetic conduction block 210 is further improved, the magnetic conduction block 210 is effectively prevented from shaking and falling, and the rotor performance and the reliable operation are improved. And the holder 100 is formed by hot-pressing and laminating a plurality of layers of first substrates 1000, and the magnetic conduction block 210 is formed by laminating magnetic conduction sheets 2100 with different sizes in a mode of gradually enlarging the size, so that the forming is convenient and quick, the magnetic conduction performance is improved, the industrialized batch production is facilitated, the structure is simple and novel, and the cost is effectively reduced.
As shown in fig. 1 to 11, the method for forming the rotor structure of the double-air-gap motor includes the following steps:
(a) Providing a retainer 100, wherein the retainer 100 has a radial limiting member 110 and a plurality of circumferential limiting members 120, and the plurality of circumferential limiting members 120 are connected to the radial limiting member 110 at intervals and extend outward;
(b) Providing a magnetic conducting assembly 200, wherein the magnetic conducting assembly 200 has a plurality of magnetic conducting blocks 210 and a yoke 220, and the plurality of magnetic conducting blocks 210 are annularly arranged on the yoke 220 at intervals;
(c) The circumferential limiting piece 120 is embedded between two adjacent magnetic conductive blocks 210 and abuts against the yoke piece 220, so that a limiting channel is formed between the magnetic conductive blocks 210 and the circumferential limiting piece 120;
(d) An inner ring 310 is sleeved outside the magnetic conduction block 210, and the fixing holes 311 on the inner ring 310 correspond to the limiting channels one to one;
(e) Sequentially penetrating a plurality of axial limit nails 400 through the fixing holes 311 one by one and inserting the axial limit nails into the limit channels;
(f) An outer ring 320 is sleeved on the outer side of the inner ring 310 and fixes the axial position-limiting nail 400.
The radial position-limiting members 110 and the inner ring 310 radially fix the magnetic conductive blocks 210, and the two adjacent circumferential position-limiting members 120 circumferentially fix the magnetic conductive blocks 210, and axially fix the magnetic conductive blocks 210 by using the axial position-limiting nails 400, so as to prevent the magnetic conductive blocks 210 from axially moving. The forming method of the double-air-gap motor rotor structure is convenient and rapid, the rotor is effectively prevented from being scrapped due to the fact that the magnetic conduction block 210 shakes or falls off, the performance of the rotor is prevented from being influenced, and the service life is prolonged.
According to one embodiment of the present invention, the step (a) further comprises the steps of:
(a1) The plurality of layers of the first substrate 1000 are stacked and hot pressed to form the holder 100.
The holder 100 is by the multilayer first substrate 1000 coincide hot briquetting, first substrate 1000 can adopt composite material, not only makes the shaping of holder 100 is convenient and fast more, still effectively promotes the intensity of holder 100, and then promotes the holder 100 is right the fixed effect of support of magnetic conduction piece 210.
Specifically, the first base material 1000 has a radial limiting portion 1100 and a circumferential limiting portion 1200, and further in the step (a 1), the radial limiting portion 1100 of the plurality of layers of the first base material 1000 is overlapped and hot-pressed to form the radial limiting member 110, and the circumferential limiting portion 1200 of the plurality of layers of the first base material 1000 is overlapped and hot-pressed to form the circumferential limiting member 120.
The size and arrangement of the circumferential limiting portion 1200 are designed according to the number of poles of the motor, the size of the magnetic conductive block 210 and other factors.
More specifically, the circumferential limiting member 120 has an upper limiting region 1201, a middle recessed region 1202 and a lower limiting region 1203 which are arranged along the axial direction, and the width of the circumferential limiting portion 1200 located in the middle recessed region 1202 is smaller than the width of the circumferential limiting portion 1200 located in the upper limiting region 1202 and the width of the circumferential limiting portion 1200 located in the lower limiting region 1203, respectively, so that the middle recessed region 1202 forms the first groove 121.
The width of the circumferential stopper 1200 in the central recessed area 1202 is determined by the shape of the axial stopper pin 400, and therefore the width of the circumferential stopper 1200 in the central recessed area 1202 may be adjusted according to the shape of the axial stopper pin 400.
The size of the radial limiting part 1100 of the multiple layers of the first base materials 1000 is kept unchanged, and the size of the circumferential limiting part 1200 in the circumferential direction of the rotor is changed to form a first groove 121 for clamping the axial limiting nail 400, so that the retainer 100 and the first groove 121 thereon are convenient to form.
According to one embodiment of the present invention, the step (b) further comprises the steps of:
(b1) Stamping the second substrate 2000 by a stamping apparatus;
(b2) The punched second substrate 2000 is rolled at the same angular speed by a rolling apparatus to form the magnetic conductive assembly 200.
The second substrate 2000 continuously transmits to the punching device, the punching device performs punching, and after punching, the second substrate 2000 transmits to the winding device, so that the second substrate 2000 is wound to form the magnetic conducting assembly 200, the magnetic conducting assembly 200 is formed more conveniently and rapidly, and the stability of the structure of the magnetic conducting block 210 is ensured.
Specifically, the second substrate 2000 after stamping has a plurality of magnetic conductive sheets 2100 and a yoke portion 2200, the plurality of magnetic conductive blocks 210 are arranged at the same side of the yoke portion 2200 at intervals, further in the step (b 2), the yoke portion 2200 is rolled to form the yoke 220, and the plurality of magnetic conductive sheets 2100 are rolled one by one to form the plurality of magnetic conductive blocks 210 arranged in a ring shape. The yoke portion 2200 is used for connecting a plurality of the magnetic conductive sheets 2100, enabling the plurality of the magnetic conductive sheets 2100 to be continuously rolled, and then subsequently cutting off the yoke portion 2200.
More specifically, in the process of rolling the second substrate 2000, the plurality of magnetic conductive sheets 2100 are connected to the yoke portion 2200, so that the magnetic conductive sheets 2100 are prevented from being dispersed in the rolling process, and after the magnetic conductive blocks 210 are stacked in a rolling manner, the yoke portion 2200 is cut off, so that the magnetic conductive blocks 210 can be formed more conveniently and rapidly, and industrial batch production can be facilitated.
Referring to fig. 3 and 10, the stamping apparatus stamps the second substrate 2000 to leave a continuous yoke portion 2200 and magnetic conductive plates 2100 arranged at intervals, and a position for embedding the circumferential position limiter 120 is corresponding between two adjacent magnetic conductive plates 2100.
In addition, the size of each magnetic conduction block 210 is gradually increased along the radial direction of the rotor, so that the stamping area of the stamping device is gradually reduced, and the magnetic conduction blocks 210 are in a fan shape. Taking eight magnetic conductive blocks 210 as an example, the punching device continuously punches the second substrate 2000 for nine times with a first area so that the second substrate 2000 forms eight magnetic conductive sheets 2100 with a first size, then the rolling device rolls the eight magnetic conductive sheets 2100 with the first size, and the eight magnetic conductive blocks 210 are sequentially and continuously arranged in a ring shape, and the punching device continuously punches the second substrate eight times with a second area so that the second substrate 2000 forms eight magnetic conductive sheets 2100 with a second size, then the rolling device rolls the eight magnetic conductive sheets 2100 with the second size outside the eight magnetic conductive sheets 2100 with the first size, and the eight magnetic conductive sheets 2100 are in one-to-one correspondence and are reciprocated in this way, so as to form the magnetic conductive assembly 200 shown in fig. 3.
In detail, the second dimension is larger than the first dimension, which refers to a dimension along the circumferential direction of the rotor, so that the plurality of magnetic conductive sheets 2100 in each magnetic conductive block 210 are overlapped to form the magnetic conductive block 210 along the radial direction of the rotor and in a manner that the circumferential dimension is gradually increased. Since the second size is larger than the first size, the second area is smaller than the first area.
It should be noted that the rolling device rolls the punched second substrate 2000 at the same angular speed, so that the plurality of magnetic conductive pieces 2100 of each magnetic conductive block 210 can correspond to each other one by one, and the influence of displacement deviation on the forming effect of the magnetic conductive block 210 is prevented.
As shown in fig. 3 and 10, the magnetic conductive plate 2100 has a recess 2110 thereon, and further in the structure of each magnetic conductive block 210, the recess 2110 on the plurality of magnetic conductive plates 2100 forms a second groove 211, and the second groove 211 and the first groove 121 form a limiting channel opposite to each other.
Since the second groove 211 and the first groove 121 constitute a stopper passage, the size of the second groove 211 is determined according to the size of the axial stopper 400.
Note that, a plurality of layers of the first base material 1000 are stacked in the axial direction of the rotor, and the second base material 2000 is rolled around the axial direction of the rotor.
According to one embodiment of the present invention, the step (f) further comprises the steps of:
the fiber tows are wrapped around the outside of the inner ring 310 and cured with a binder to form the fiber tows into the outer ring 320.
According to an embodiment of the present invention, the method further comprises the following steps between the steps (e) and (f):
the yoke 220 is cut to obtain a double air gap motor rotor structure. The yoke 220 may be cut out by a wire cutting or grinding machine to form the rotor structure of the dual air gap motor shown in fig. 1, in which the dimensions of the holder 100, the magnetic conductive blocks 210, the inner ring 310 and the outer ring 320 in the axial direction of the rotor are the same, and the axial dimension of the rotor structure of the dual air gap motor is thin to be suitable for installation in a thin installation space.
According to an embodiment of the present invention, the step (f) further comprises the steps of:
and integrally polishing and magnetizing the rotor structure of the double-air-gap motor. The flatness of the rotor is improved by grinding.
In conclusion, the forming method of the double-air-gap motor rotor structure is convenient and rapid, the rotor is effectively prevented from being scrapped due to shaking or falling off of the magnetic conduction block 210, the performance of the rotor is prevented from being influenced, and the service life is further prolonged. The holder 100 is by the multilayer first substrate 1000 coincide hot briquetting, first substrate 1000 can adopt compound material, not only makes the shaping of holder 100 is convenient and fast more, still effectively promotes the intensity and the magnetic conductivity of holder 100, and then promotes the holder 100 is right the fixed effect of support of magnetic conduction piece 210. The magnetic conduction assembly 200 utilizes the second substrate 2000, and is formed by stamping and rolling under the action of the stamping equipment and the rolling equipment, so that the magnetic conduction assembly 200 is more convenient and faster to form, the magnetic conduction performance is improved, the stability of the structure of the magnetic conduction block 210 is ensured, and industrial batch production is realized.
The above-mentioned embodiments are only for illustrating the technical idea and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement the present invention accordingly, and the scope of the present invention is not limited by the embodiments, i.e. all equivalent changes or modifications made according to the spirit of the present invention will still fall within the scope of the present invention.
Claims (6)
1. A double-air-gap motor rotor structure is characterized by comprising a retainer (100), a magnetic conduction assembly (200), a plurality of axial limiting nails (400) and a ring assembly (300), wherein the retainer (100) is provided with a radial limiting piece (110), the magnetic conduction assembly (200) is provided with a plurality of magnetic conduction blocks (210), the plurality of magnetic conduction blocks (210) are arranged in a ring shape and are fixed between the radial limiting piece (110) and the ring assembly (300), the ring assembly (300) comprises an inner ring (310) and an outer ring (320), the inner ring (310) is an auxiliary ring which does not have a fiber bundle regular arrangement structure, the outer ring (320) is a stressed ring which has a fiber bundle regular arrangement structure, a fixing hole (311) is formed in the inner ring (310), the outer ring (320) is bound on the outer side of the inner ring (310) along the circumferential direction of a rotor, one end of each axial limiting nail (400) is inserted into the fixing hole (311), the other end of each axial limiting nail (400) is inserted into the retainer (100), or the other end of each axial limiting nail (400) is inserted into the retainer (400) and the inner ring (210);
the retainer (100) is further provided with a plurality of circumferential limiting pieces (120), the circumferential limiting pieces (120) are arranged along the circumferential direction of the rotor and are connected to the radial limiting pieces (110) in an outward extending manner, and the circumferential limiting pieces (120) and the magnetic conduction blocks (210) are arranged at intervals;
the circumferential limiting piece (120) is abutted to the magnetic conduction block (210) to form a limiting channel, and the axial limiting nail (400) is kept in the limiting channel to prevent the magnetic conduction block (210) from moving along the axial direction of the rotor.
2. The double air gap electric machine rotor structure of claim 1, characterized in that the outer ring (320) is wound from carbon fiber rings and the inner ring (310) is made from a metallic material.
3. The rotor structure of a dual-air-gap motor according to claim 1, wherein the circumferential position-limiting member (120) defines a first groove (121), the magnetic block (210) defines a second groove (211), and when the magnetic block (210) abuts against the circumferential position-limiting member (120), the first groove (121) and the second groove (211) are opposite to each other and form the position-limiting channel.
4. A double air gap electric machine rotor structure according to claim 3, characterized in that the axial limit pin (400) abuts between the radial limit stop (110) and the outer ring (320) in the rotor radial direction.
5. The dual air gap electric machine rotor structure of claim 1, characterized in that the axial limit pin (400) is an interference fit with the limit channel.
6. The double-air-gap motor rotor structure of claim 1, wherein the holder (100) comprises a plurality of layers of first base materials (1000), the plurality of layers of first base materials (1000) are stacked and hot-pressed along the axial direction of the rotor to form the holder (100), the magnetic conducting block (210) comprises a plurality of layers of magnetic conducting sheets (2100) with different sizes, the magnetic conducting sheets (2100) are arc-shaped, and the plurality of layers of magnetic conducting sheets (2100) are stacked and hot-pressed along the radial direction of the rotor in a size increasing manner to form the magnetic conducting block (210).
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| CN202110894563.XA CN113612326B (en) | 2021-08-05 | 2021-08-05 | Double-air-gap motor rotor structure |
| PCT/CN2021/118745 WO2023010653A1 (en) | 2021-08-05 | 2021-09-16 | Disk type electric motor rotor, forming method and double-air-gap electric motor rotor structure |
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| CN202110894563.XA CN113612326B (en) | 2021-08-05 | 2021-08-05 | Double-air-gap motor rotor structure |
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| DE102011089985A1 (en) * | 2011-12-27 | 2013-06-27 | Bayerische Motoren Werke Aktiengesellschaft | Method for manufacturing rotor of disc-shaped motor for vehicle, involves inserting permanent magnet in space between side surfaces of flux guidance stone so that flux guidance stone and magnet are arranged side by side on orbit |
| DE202012012228U1 (en) * | 2012-12-20 | 2013-02-01 | Klaus-Dieter Nies | Rotor for a machine shaft of an electric axial flux machine |
| JP6700596B2 (en) * | 2016-06-21 | 2020-05-27 | 株式会社デンソー | Rotor for axial gap motor and axial gap motor |
| CN109038894B (en) * | 2018-08-31 | 2020-07-03 | 浙江盘毂动力科技有限公司 | Disc type rotor structure and disc type motor |
| CN109546820A (en) * | 2019-01-03 | 2019-03-29 | 核心驱动科技（金华）有限公司 | A kind of motor in axial magnetic field rotor and its moulding process |
| CN109713819B (en) * | 2019-01-07 | 2020-03-20 | 南京航空航天大学 | High-strength Halbach permanent magnet array rotor structure |
| CN211981598U (en) * | 2019-11-27 | 2020-11-20 | 宜格赛特自动化技术(苏州)有限公司 | Motor rotor disc and forming die thereof |
| CN111181337B (en) * | 2020-02-26 | 2021-12-21 | 安徽美芝精密制造有限公司 | Rotor assembly, assembling method thereof, motor and electric vehicle |
| CN212784935U (en) * | 2020-08-24 | 2021-03-23 | 上海盘毂动力科技股份有限公司 | Rotor assembly based on fiber ring fixing magnetic steel |
| CN111900812A (en) * | 2020-08-24 | 2020-11-06 | 上海盘毂动力科技股份有限公司 | Fixing structure of magnetic steel in disc type motor rotor |
| CN213125673U (en) * | 2020-10-23 | 2021-05-04 | 浙江盘毂动力科技有限公司 | Rotor disc assembly |
| CN113014012B (en) * | 2021-02-09 | 2022-03-01 | 苏蓉 | Rotor assembly and disc type motor |
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| 无槽盘式永磁风力发电机有限元分析;冯勇利等;《防爆电机》;20090520;第44卷(第03期);第39-43页 * |
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Denomination of invention: A dual air gap motor rotor structure Effective date of registration: 20231214 Granted publication date: 20230131 Pledgee: China Minsheng Bank Limited Jinhua Branch Pledgor: Zhejiang Panhu Power Technology Co.,Ltd. Registration number: Y2023980071207 |