CN114268197A - Rotor disc of axial magnetic motor and forming method - Google Patents
Rotor disc of axial magnetic motor and forming method Download PDFInfo
- Publication number
- CN114268197A CN114268197A CN202111610274.9A CN202111610274A CN114268197A CN 114268197 A CN114268197 A CN 114268197A CN 202111610274 A CN202111610274 A CN 202111610274A CN 114268197 A CN114268197 A CN 114268197A
- Authority
- CN
- China
- Prior art keywords
- silicon steel
- disc
- rotor
- blocks
- axial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a rotor disc of an axial flux motor and a forming method, wherein the forming method comprises the following steps: punching and shearing a strip-shaped silicon steel sheet, wherein the punched and sheared strip-shaped silicon steel sheet is provided with a plurality of block sheet parts for rolling to form a silicon steel block and a plurality of rib sheet parts for rolling to form a connecting rib, and at least two rib sheet parts are connected between any two adjacent sheet parts; rolling the punched and sheared strip-shaped silicon steel sheet to form a silicon steel disc, wherein the silicon steel disc comprises a plurality of silicon steel blocks which are circumferentially arranged at intervals, and at least two connecting ribs are connected between any two adjacent silicon steel blocks so as to divide the space between the two adjacent silicon steel blocks into magnetism isolating grooves which are respectively arranged at two axial sides of the silicon steel disc and a plurality of accommodating holes which are positioned between the two magnetism isolating grooves; and respectively clamping rotor supports on two axial sides of the silicon steel disc, and embedding the torque transmission rod into the receiving hole to form the rotor disc. The manufacturing efficiency and the reliability of the silicon steel disc are improved, the size, the electromagnetism and the position consistency of the silicon steel blocks on the disc are ensured, and the industrial batch production is favorably developed.
Description
Technical Field
The invention relates to the field of axial flux motors, in particular to a rotor disc of an axial flux motor and a forming method.
Background
The axial flux motor has the advantages of small axial size, high torque density, high power density, high efficiency and the like, and is widely applied to the fields of electric automobiles, general industries, household appliances and the like. The existing axial flux motor generally adopts silicon steel sheets as laminated materials of a rotor and a stator, in the forming process of the rotor, a plurality of sheets with different widths are formed by stamping and cutting the silicon steel sheets, then the sheets are overlapped in sequence according to the gradually increasing mode of the width to form a plurality of fan-shaped silicon steel blocks with the same shape, and finally the plurality of silicon steel blocks are arranged on a rotor support at annular intervals, and the multilayer sheets of each silicon steel block are arranged along the radial direction of the rotor support to obtain the rotor.
According to the silicon steel block laminating machine, each silicon steel block needs a plurality of sheets with different widths to be laminated, the manufacturing efficiency is low, the consistency of each silicon steel block cannot be guaranteed, eddy current loss is even caused, and the reliability of a rotor is reduced. In addition, the silicon steel blocks are required to be spliced with the rotor support one by one, the forming efficiency of the rotor is also influenced, and further industrial batch production cannot be carried out.
Disclosure of Invention
In order to solve the problems, the invention provides a rotor disc of an axial flux motor and a forming method thereof, which have high production efficiency and keep the consistency of products, and are convenient for developing industrial mass production.
According to an object of the present invention, there is provided a method of forming a rotor disc of an axial flux machine, comprising the steps of:
(a) punching and shearing a strip-shaped silicon steel sheet, wherein the punched and sheared strip-shaped silicon steel sheet is provided with a plurality of block sheet parts for rolling to form a silicon steel block and a plurality of rib sheet parts for rolling to form a connecting rib, and at least two rib sheet parts are connected between any two adjacent block sheet parts;
(b) rolling the punched and sheared strip-shaped silicon steel sheet to form an annular silicon steel disc, wherein the silicon steel disc comprises a plurality of silicon steel blocks which are circumferentially arranged at intervals, and at least two connecting ribs are connected between any two adjacent silicon steel blocks so as to divide the space between the two adjacent silicon steel blocks into magnetism isolating grooves which are respectively arranged at two sides of the silicon steel disc in the axial direction and a plurality of accommodating holes which are positioned between the two magnetism isolating grooves;
(f) and respectively clamping rotor supports on two axial sides of the silicon steel disc to form a rotor disc, wherein the rotor supports are embedded in the magnetism isolating grooves and expose the axial end faces of the silicon steel blocks.
As a preferred technical scheme, the rotor support comprises an inner retainer ring, an outer retainer ring and a plurality of fixture blocks connected between the inner retainer ring and the outer retainer ring, the fixture blocks are arranged at intervals along the circumferential direction, and a jack is formed between every two adjacent fixture blocks, so that in the step (f), the fixture blocks are embedded in the magnetism isolating grooves, the silicon steel blocks are inserted into the jack, the inner retainer ring is sleeved on the inner periphery of the silicon steel disc, and the outer retainer ring is sleeved on the outer periphery of the silicon steel disc.
As a preferable technical scheme, the number of the connecting ribs between two adjacent silicon steel blocks is two, the two connecting ribs are arranged along the silicon steel disc at intervals in the axial direction, and the axial end surfaces of the silicon steel blocks are arranged in a protruding manner relative to the connecting ribs.
As a preferred technical solution, the method further comprises the following steps between the step (b) and the step (f):
(e) a protective ring is sleeved on the outer periphery of the silicon steel disc.
As a preferred technical solution, the method further comprises the following steps after the step (b):
(c) and providing a fixed tool, fixing the fixed tool on the inner and outer peripheries of the silicon steel disc, and shaping and taking down the silicon steel disc.
According to an object of the present invention, the present invention also provides a rotor disc of an axial flux machine, comprising:
the silicon steel disc comprises a plurality of silicon steel blocks which are arranged at intervals in the circumferential direction, at least two connecting ribs are connected between any two adjacent silicon steel blocks so as to divide the space between the two adjacent silicon steel blocks into magnetism isolating grooves which are respectively arranged on two sides of the silicon steel disc in the axial direction and a plurality of accommodating holes which are arranged between the two magnetism isolating grooves;
the protective ring is sleeved on the outer periphery of the silicon steel disc;
and the two rotor supports are respectively clamped at the two axial sides of the silicon steel disc to form a rotor disc, wherein the rotor supports are embedded in the magnetism isolating grooves and expose the axial end faces of the silicon steel blocks.
According to a preferable technical scheme, the rotor support comprises an inner retainer ring, an outer retainer ring and a plurality of fixture blocks connected between the inner retainer ring and the outer retainer ring, the fixture blocks are arranged at intervals along the circumferential direction, a jack is formed between every two adjacent fixture blocks, the fixture blocks are embedded in the magnetism isolating grooves, so that the silicon steel blocks are inserted into the jacks, the inner retainer ring is sleeved on the inner periphery of the silicon steel disc, and the outer retainer ring is sleeved on the outer periphery of the silicon steel disc.
According to a preferable technical scheme, the silicon steel block is trapezoidal, and the silicon steel block is formed by stacking a plurality of layers of block sheet parts with different sizes along the height direction of the trapezoid.
As preferred technical scheme, piece portion is the arc, the trapezoidal bottom of silicon steel piece is the arc arch, the trapezoidal top of silicon steel piece is the arc recess.
Preferably, the dimension of the magnetism isolating groove in the axial direction of the silicon steel disc is smaller than the dimension of the connecting rib in the axial direction of the silicon steel disc.
Compared with the prior art, the technical scheme has the following advantages:
roll up the banded silicon steel sheet after punching and shearing in order to form an organic whole silicon steel dish, wherein the silicon steel dish includes a plurality of circumference arrays the silicon steel piece to adjacent two form between the silicon steel piece and be used for connecting two at least splice bars, and quilt the splice bar separates and establishes respectively the silicon steel dish axial both sides the magnetism-isolating groove, and be located two a plurality of between the magnetism-isolating groove accomodates the hole. Compared with the mode that a plurality of silicon steel blocks are formed by stacking sheets with different widths one by one in the prior art, the manufacturing efficiency of the silicon steel disc is improved, and the size consistency of the silicon steel blocks is ensured. Compared with the prior art in which the silicon steel blocks are formed by adopting a welding and cutting mode, the silicon steel block interlayer insulation performance is improved, eddy current loss is avoided, and the electromagnetic consistency of the silicon steel blocks is ensured. In addition, in the step (f), rotor supports are directly clamped on two axial sides of the silicon steel disc respectively, so that compared with the prior art that a plurality of silicon steel blocks are placed on the supports one by one, the forming efficiency of the rotor disc is effectively improved, the position consistency of the silicon steel blocks on the rotor disc is ensured, and the industrial batch production is favorably developed. Further, adjacent two connect two at least muscle piece portions between the piece portion, strengthened adjacent two connection performance between the piece portion prevents to appear the phenomenon of rupture at the book system in-process, and then reaches the realizability.
The invention is further described with reference to the following figures and examples.
Drawings
Fig. 1 is a flow chart of a method of forming a rotor disk of an axial-flux electric machine according to the present invention;
fig. 2 is a schematic structural view of a strip-shaped silicon steel sheet after punching and shearing according to the present invention;
FIG. 3 is a schematic structural diagram of a silicon steel disc according to the present invention;
FIG. 4 is a schematic structural view of a combination of a silicon steel disc and a fixed tool according to the present invention;
FIG. 5 is a schematic structural view of the combination of a silicon steel disk and a rotor spider according to the present invention;
fig. 6 is a schematic structural diagram of a rotor disc and a rotating shaft combination according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given 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 3 and 5, a method for forming a rotor disk of an axial-flux electric machine includes the following steps:
(a) punching and shearing a strip-shaped silicon steel sheet 1000, wherein the punched and sheared strip-shaped silicon steel sheet 1000 is provided with a plurality of block sheet parts 1100 for rolling to form a silicon steel block 110 and a plurality of rib sheet parts 1200 for rolling to form a connecting rib 120, and at least two rib sheet parts 1200 are connected between any two adjacent block sheet parts 1100;
(b) rolling the punched and sheared strip-shaped silicon steel sheet 1000 to form an annular silicon steel disc 100, wherein the silicon steel disc 100 comprises a plurality of silicon steel blocks 110 which are circumferentially arranged at intervals, and at least two connecting ribs 120 are connected between any two adjacent silicon steel blocks 110 so as to divide the space between the two adjacent silicon steel blocks 110 into magnetism isolating grooves 130 which are respectively arranged at two axial sides of the silicon steel disc 100 and a plurality of accommodating holes 140 which are arranged between the two magnetism isolating grooves 130;
(f) rotor supports 300 are respectively clamped on two axial sides of the silicon steel disc 100 to form a rotor disc, wherein the rotor supports 300 are embedded in the magnetism isolating grooves 130, and axial end faces of the silicon steel blocks 110 are exposed.
The stamped and sheared strip-shaped silicon steel sheet 1000 is rolled to form an integral silicon steel disc 100, wherein the silicon steel disc 100 comprises a plurality of circumferential arrays of silicon steel blocks 110, at least two connecting ribs 120 for connection are formed between every two adjacent silicon steel blocks 110, the connecting ribs 120 are used for separating and respectively arranging the magnetism isolating grooves 130 at two axial sides of the silicon steel disc 100, and a plurality of accommodating holes 140 are formed between the two magnetism isolating grooves. Compared with the mode that a plurality of silicon steel blocks are formed by stacking sheets with different widths one by one in the prior art, the manufacturing efficiency of the silicon steel disc is improved, and the size consistency of the silicon steel blocks is ensured. Compared with the prior art in which the silicon steel blocks are formed by adopting a welding and cutting mode, the insulating property between 110 layers of the silicon steel blocks is improved, eddy current loss is avoided, and the electromagnetic consistency of the silicon steel blocks is ensured. In addition, in the step (f), the rotor supports 300 are directly clamped on the two axial sides of the silicon steel disc 100, so that compared with the prior art that a plurality of silicon steel blocks are placed on the supports one by one, the forming efficiency of the rotor disc is effectively improved, the position consistency of each silicon steel block 110 on the rotor disc is ensured, and further, the industrial batch production is favorably developed. Further, at least two rib sheet parts 1200 are connected between two adjacent block sheet parts 1100, so that the connection performance between the two adjacent block sheet parts 1100 is enhanced, the phenomenon of fracture in the rolling process is prevented, and the realizability is further achieved.
The step (a) includes: the strip-shaped silicon steel sheet 1000 is punched and cut, wherein the punched and cut strip-shaped silicon steel sheet 1000 has a plurality of block sheet portions 1100 for rolling to form the silicon steel block 110 and a plurality of rib sheet portions 1200 for rolling to form the connecting rib 120, and at least two rib sheet portions 1200 are connected between any two adjacent block sheet portions 1100, referring to fig. 2.
Two sides of the strip-shaped silicon steel sheet 1000 in the width direction correspond to two sides of the formed silicon steel disc 100 in the axial direction, so that the multi-layer sheet portions 1100 of the silicon steel block 110 are formed by rolling, the sizes of the multi-layer sheet portions are consistent along the axial direction of the silicon steel disc 100, and only the sizes (the widths of the sheet portions 1100) along the circumferential direction of the silicon steel disc 100 are inconsistent. Specifically, the multi-layered block piece portion 1100 rolled to form the silicon steel block 110 has a width along a radial direction of the silicon steel disc 100 and gradually increases from the inside to the outside. In addition in the fashioned silicon steel block 110, piece portion 1100 is the arc, promptly the trapezoidal bottom of silicon steel block 110 is the arc arch, and trapezoidal bottom corresponds the outer peripheral edges of silicon steel dish 100, the trapezoidal top of silicon steel block 110 is the arc recess, and trapezoidal top corresponds the silicon steel dish 100 internal peripheral edges.
Taking 5 magnetic steel blocks 110 as an example to describe the rolling method of the silicon steel disc 100, the strip-shaped silicon steel sheet 1000 is first punched and sheared 6 times with a first width to form 5 block sheet portions 1100 with a first width, then rolled by a rolling device at the same angular speed to make the 5 block sheet portions 1100 with the first width arranged circumferentially, and simultaneously the strip-shaped silicon steel sheet 1000 is punched and sheared 5 times with a second width larger than the first width to form 5 block sheet portions 1100 with a second width, and then the block sheet portions 1100 with the second width are rolled outside the block sheet portions 1100 with the first width to make the block sheet portions 1100 with the second width correspond to the block sheet portions 1100 with the first width, and so on, so on to form 5 silicon steel blocks 110 arranged circumferentially at intervals and in a trapezoid shape.
Similarly, the slot portions 1300, which are disposed on both sides of the strip-shaped silicon steel sheet 1000 in the width direction and are opposite to each other, form the magnetic isolation slots 130 respectively disposed on both sides of the silicon steel disc 100 in the axial direction after being rolled, and the magnetic isolation slots 130 penetrate through the inner and outer peripheries of the silicon steel disc 100.
And a receiving hole 1400 opened between the two opposite groove holes 1300, which forms a receiving hole 140 between the two opposite magnetism isolating grooves 130 after being rolled, and the receiving hole 140 penetrates the inner and outer peripheries of the silicon steel disc 100.
Preferably, the slot 1300 and the hole receiving 1400 between two adjacent sheet portions 1100 can be formed by one punching, which not only improves the forming efficiency, but also effectively avoids the position deviation caused by multiple punching, thereby affecting the size consistency of the formed silicon steel block 110.
Referring to fig. 2 and 3, the connection rib 120 is rectangular, the rib pieces 1200 are all rectangular when the plurality of layers of the connection rib 120 are rolled, and the width of each rib piece 1200 is uniform, so that the connection rib 120 formed by rolling is rectangular. In roll up the system formation in the splice bar 120, muscle piece portion 1200 is the arc, the inboard of splice bar 120 is the arc recess, the outside of splice bar 120 is the arc arch, wherein the inboard of splice bar 120 corresponds the internal peripheral edge of silicon steel disc 100, the outside of splice bar 120 corresponds the external peripheral edge of silicon steel disc 100.
With continued reference to fig. 2, the two opposing slot segments 1300 have a uniform and rectangular shape that corresponds to the cross-sectional shape of the flux barrier 130, such that the flux barrier 130 is also formed as a rectangular shape. The receiving hole 1400 is also rectangular and corresponds to the cross-sectional shape of the receiving hole 140, so that the receiving hole 140 formed by rolling is also rectangular. The dimensions of the slot portions 1300 and the receiving hole portions 1400 in the length direction of the strip-shaped silicon steel sheet 1000 are the same, and the two ends in the length direction are flush, and the dimensions of the slot portions 1300 and the receiving hole portions 1400 in the width direction of the strip-shaped silicon steel sheet 1000 may not be the same.
In one embodiment, when the number of the rib portions 1200 between two adjacent sheet portions 1100 is two, the number of the slot portions 1300 is two, two of the connection ribs 120 are spaced apart from each other along the axial direction of the silicon steel disc 100, and the axial end surface of the silicon steel block 110 is protruded relative to the connection ribs 120 to form the magnetism isolating slot 130 in the axial direction of the silicon steel disc 100, wherein the number of the hole receiving portions 1400 is one and is located between two of the rib portions 1200.
In another embodiment, when the number of the rib plate portions 1200 between two adjacent plate portions 1100 is three, three of the connecting ribs 120 are spaced apart along the axial direction of the silicon steel disc 100, and the axial end surface of the silicon steel block 110 is protruded relative to the connecting ribs 120 to form the magnetism isolating groove 130 in the axial direction of the silicon steel disc 100, wherein the number of the groove hole portions 1300 is two, the number of the receiving hole portions 1400 is two, that is, a receiving hole portion 1400 is formed between two adjacent rib plate portions 1200, and two receiving hole portions 1400 are spaced apart along the width direction of the strip-shaped silicon steel sheet 1000.
The step (b) comprises: the punched and sheared strip-shaped silicon steel sheet 1000 is rolled to form an annular silicon steel disc 100, wherein the silicon steel disc 100 comprises a plurality of silicon steel blocks 110 which are circumferentially arranged at intervals, at least two connecting ribs 120 are connected between any two adjacent silicon steel blocks 110, so that the space between the two adjacent silicon steel blocks 110 is divided into magnetism isolating grooves 130 which are respectively arranged at two axial sides of the silicon steel disc 100, and a plurality of accommodating holes 140 which are arranged between the two magnetism isolating grooves 130.
Referring to fig. 3, a plurality of the silicon steel blocks 110 are arranged at intervals along the circumferential direction, two adjacent silicon steel blocks 110 are connected with at least two of the connecting ribs 120, two of the connecting ribs 120 are arranged at intervals along the axial direction of the silicon steel disc 100, so that two adjacent silicon steel blocks 110 are separated into two same spaces, and are respectively arranged at two axial sides of the silicon steel disc 110 and opposite to the magnetism isolating grooves 130, and a plurality of accommodating holes 140 are arranged between the magnetism isolating grooves 130, and the plurality of accommodating holes 140 are arranged at intervals along the axial direction of the silicon steel disc 100.
Specifically, the silicon steel block 110 is trapezoidal, the top of the trapezoid corresponds to the inner periphery of the silicon steel disc 100, the bottom of the trapezoid corresponds to the outer periphery of the silicon steel disc 100, and the height direction of the trapezoid corresponds to the radial direction of the silicon steel disc 100. The connecting rib 120 is rectangular, the magnetism isolating groove 130 and the accommodating hole 140 are also rectangular, and the magnetism isolating groove 130 and the accommodating hole 140 penetrate through the inner and outer peripheries of the silicon steel disc 100. The sum of the dimension of the connecting rib 120, the dimension of the two magnetism isolating grooves 130, and the dimension of the plurality of accommodating holes 140 in the axial direction of the silicon steel disc 110 is equal to the dimension of the silicon steel block 110 in the axial direction of the silicon steel disc 110.
More specifically, the size of the connecting rib 120 affects not only the size of the magnetic isolation groove 130 and the size of the receiving hole 140, but also the connection performance between two adjacent silicon steel blocks. In addition, the magnetism isolating groove 130 is embedded in the rotor support 300, and the size of the magnetism isolating groove 130 affects the fixing performance of the silicon steel disc 100 and the rotor support 300, and once the connection and fixing performance is poor, the output torque of the motor is affected, and even the eddy current loss of the rotor is caused. In a preferred embodiment, the dimension of the receiving hole 140 in the axial direction of the silicon steel disc 110 is 4 times or more of the dimension of the connecting rib 120 in the axial direction of the silicon steel disc 110, at this time, the dimension of the magnetism isolating groove 130 in the axial direction of the silicon steel disc 110 is smaller and can be smaller than the dimension of the connecting rib 120 in the axial direction of the silicon steel disc 110, and under the condition that the fixing performance of the magnetism isolating groove 130 and the rotor bracket 300 is good, the connection performance of the connecting rib 120 and the silicon steel block 110 is also improved, so that the output torque of the motor is ensured, and the eddy current loss of the rotor is effectively reduced.
The silicon steel blocks 110, the connecting ribs 120, the magnetism isolating grooves 130 and the accommodating holes 140 are formed by rolling the strip-shaped silicon steel sheets 1000 after punching and shearing, and the number, the size and the like of the silicon steel blocks 110 can be selected according to design requirements, for example, the axial size of the silicon steel blocks 110 corresponds to the width of the silicon steel sheets 1000 and the like. Wherein punching shear and rolling can be carried out simultaneously, further improving the forming efficiency.
The steps (b) to (e) further comprise the following steps:
(c) providing a fixing tool 400 fixed on the inner and outer peripheries of the silicon steel disc 100 to shape and take down the silicon steel disc 100.
The rolled silicon steel disc 100 is shaped by the fixing tool 400, so that the silicon steel blocks 110 and the like are prevented from deforming, and the size consistency of each silicon steel block 110 is influenced.
As shown in fig. 4, the fixing tool 400 includes an inner fixing ring 410 and an outer fixing ring 420, the inner fixing ring 410 is sleeved on the inner periphery of the silicon steel disc 100, and the outer fixing ring 420 is sleeved on the outer periphery of the silicon steel disc 100 to determine the quality of the silicon steel disc 100.
Continuing to refer to fig. 4, the inner fixing ring 410 is annular, and the outer fixing ring 420 includes two hoops, two hoops are hooped on the outer periphery of the silicon steel disc 100 and locked by the screws 430, so that the installation is convenient and fast, and the shaping effect is effectively improved.
The steps (b) to (c) further comprise the following steps:
(d) within the receiving bore 140 is placed a torque transmission rod 700, see fig. 5.
The torque transmission rod may be a part made of the same material as the silicon steel disc or an insulating material to support the silicon steel disc 100 to prevent the silicon steel disc 100 from being deformed in a subsequent high-speed rotation. Of course, the receiving hole 140 may be formed without a torque transmission rod.
Further comprising the steps of (b) to (f) between:
(e) a guard ring 500 is sleeved on the outer periphery of the silicon steel disc 100.
The protective ring 500 is sleeved on the outer periphery of the silicon steel disc 100, so that deformation caused by the rotational centrifugal force of the rotor is overcome. The guard ring 500 may be formed by winding glass fiber or the like.
As shown in fig. 6, the axial dimension of the silicon steel block 110 is greater than the dimension of the guard ring 500 in the axial direction of the silicon steel disc 100, and the distances from the guard ring 500 to the two axial sides of the silicon steel disc 100 are the same, so as to reserve the installation positions of the rotor holder 300 on the two sides of the guard ring 500, and it can be seen that the guard ring 500 and the rotor holder 300 can fill and close the outer periphery of the silicon steel disc 100, thereby reducing the rotor rotation wind resistance.
Referring to fig. 3 and 6, the guard ring 500 is located at an intermediate position in the axial direction of the silicon steel disc, and the dimension of the guard ring 500 in the axial direction of the silicon steel disc 100 is larger than the dimension of the connecting ribs 120 in the axial direction of the silicon steel disc 100, and when the number of the connecting ribs 120 is two, the guard ring 500 may shield the receiving hole 140, further preventing the rotor from being deformed.
The step (f) includes: rotor supports 300 are respectively clamped on two axial sides of the silicon steel disc 100 to form a rotor disc, wherein the rotor supports 300 are embedded in the magnetism isolating grooves 130, and axial end faces of the silicon steel blocks 110 are exposed.
The rotor support 300 is clamped on two axial sides of the silicon steel disc 100 to support the silicon steel blocks 110, so that the size consistency of the silicon steel blocks 110 is ensured, the output torque of a motor is ensured, and the eddy current loss of a rotor is effectively reduced.
As shown in fig. 5, the rotor holder 300 includes an inner retainer 310, an outer retainer 320, and a plurality of latches 330 connecting between the inner retainer 310 and the outer retainer 320, the plurality of latches 330 are arranged at intervals along the circumferential direction, and an insertion hole 340 is formed between two adjacent latches 330, so that in the step (f), the latches 330 are embedded in the magnetism isolating groove 130, so that the silicon steel block 110 is inserted into the insertion hole 340, the inner retainer 310 is sleeved on the inner periphery of the silicon steel disc 100, and the outer retainer 320 is sleeved on the outer periphery of the silicon steel disc 100.
The fixture block 330 and the magnetism isolating groove 130 have the same shape, both of which are rectangular, and the insertion hole 340 and the silicon steel block 110 have the same shape, both of which are trapezoidal. In addition, the outer end surface of the rotor holder 300 formed by the inner retainer ring 310, the outer retainer ring 320 and the fixture block 300 is a plane, and when the silicon steel block 110 is inserted into the insertion hole 340, the axial end surface of the silicon steel block 100 is flush with the outer end surface of the rotor holder 300.
Specifically, the inner retainer ring 310 and the fixture block 300 have the same dimension in the axial direction of the rotor frame, while the outer retainer ring 320 has a smaller dimension in the axial direction of the rotor frame, referring to fig. 6, two outer retainer rings 320 and a guard ring 200 are sleeved on the outer periphery of the silicon steel disc 100, and the two outer retainer rings 320 are located on two sides of the guard ring 200, and the three seal the outer periphery of the silicon steel disc 100.
As shown in fig. 5, the length of the torque transmission rod 700 may be longer than the length of the receiving hole 140, but the outer end surface of the torque transmission rod 700 is flush with the outer circumference of the silicon steel disc 100 to sleeve the protection ring 500 on the outer circumference of the subsequent silicon steel disc 100. The inner end surface of the torque transmission rod 700 protrudes inward from the inner periphery of the silicon steel disc 100, and is fixed to the rotor holder 300 in a subsequent engagement manner.
The inner retainer ring 310 is provided with inner cavities 312 for accommodating the torque transmission rods 700, when the two rotor supports 300 are clamped on the silicon steel disc 100, the inner cavities 312 on the two rotor supports 300 are in one-to-one correspondence, and the corresponding two inner cavities 312 wrap the parts of the torque transmission rods 700 protruding out of the inner periphery of the silicon steel disc 100 so as to fix the torque transmission rods 700.
Said step (f) is further followed by the steps of:
the rotor disc is sleeved on the rotating shaft 600.
As shown in fig. 6, the rotating shaft 600 penetrates the centers of the two rotor supports 300 and the silicon steel disc 100, and the two rotor supports 300 and the silicon steel disc 100 are fixed by fastening members. With continued reference to fig. 6, a bracket through hole 311 for the rotation shaft 600 to pass through is formed in the center of the inner retainer 310, and an inner retainer mounting hole through which a fastener passes is formed in the inner retainer 310.
More specifically, the rotating shaft 600 includes a shaft body and a step body, the step body is integrally connected to the shaft body, a step mounting hole is formed in the step body, and after the shaft body penetrates through the two rotor supports 300 and the silicon steel disc 100, a rotor support 300 close to the step body can be abutted and fixed to the step body and sequentially passes through the inner retainer ring mounting hole and the step mounting hole through a fastener, so that the rotor disc is fixed to the rotating shaft 600, and the rotor disc and the step body rotate together.
As shown in fig. 5 and 6, both axial end surfaces of the silicon steel block 110 are exposed by the rotor support 300 on both sides, so that the rotor disc of the present invention is suitable for a double-stator single-rotor motor.
In summary, the stamped and sheared strip-shaped silicon steel sheet 1000 is rolled to form an integral silicon steel disc 100, wherein the silicon steel disc 100 includes a plurality of silicon steel blocks 110 in a circumferential array, at least two connecting ribs 120 for connection are formed between two adjacent silicon steel blocks 110, the magnetic isolation grooves 130 are separated by the connecting ribs 120 and respectively disposed on two axial sides of the silicon steel disc 100, and a plurality of accommodating holes 140 are disposed between the two magnetic isolation grooves. Compared with the mode that a plurality of silicon steel blocks are formed by stacking sheets with different widths one by one in the prior art, the manufacturing efficiency of the silicon steel disc is improved, and the size consistency of the silicon steel blocks is ensured. Compared with the prior art in which the silicon steel blocks are formed by adopting a welding and cutting mode, the insulating property between 110 layers of the silicon steel blocks is improved, eddy current loss is avoided, and the electromagnetic consistency of the silicon steel blocks is ensured. In addition, in the step (f), the rotor supports 300 are directly clamped on the two axial sides of the silicon steel disc 100, so that compared with the prior art that a plurality of silicon steel blocks are placed on the supports one by one, the forming efficiency of the rotor disc is effectively improved, the position consistency of each silicon steel block 110 on the rotor disc is ensured, and further, the industrial batch production is favorably developed. Further, at least two rib sheet parts 1200 are connected between two adjacent block sheet parts 1100, so that the connection performance between the two adjacent block sheet parts 1100 is enhanced, the phenomenon of fracture in the rolling process is prevented, and the realizability is further achieved.
As shown in fig. 3, the present invention further provides an annular silicon steel disc 100, where the silicon steel disc 100 includes a plurality of silicon steel blocks 110 arranged at intervals in a circumferential direction, and at least two connecting ribs 130 are connected between any two adjacent silicon steel blocks 110, so as to divide a space between two adjacent silicon steel blocks 110 into magnetism isolating grooves 130 respectively disposed at two axial sides of the silicon steel disc 100, and a plurality of accommodating holes 140 disposed between the two magnetism isolating grooves 130.
Compared with the prior art in which a plurality of silicon steel blocks 110 are independently formed, the silicon steel disc 100 is prevented from being lost, the forming efficiency of assembling the silicon steel disc 100 into a rotor disc is effectively improved, the position consistency of each silicon steel block 110 on the rotor disc is ensured, and the mechanical reliability of the rotor disc is greatly enhanced.
The silicon steel block 110 is trapezoidal, the top of the trapezoid corresponds to the inner peripheral edge of the silicon steel disc 100, the bottom of the trapezoid corresponds to the outer peripheral edge of the silicon steel disc 100, and the height direction of the trapezoid corresponds to the radial direction of the silicon steel disc 100. The connecting rib 120 is rectangular, the magnetism isolating groove 130 and the accommodating hole 140 are also rectangular, and the magnetism isolating groove 130 and the accommodating hole 140 penetrate through the inner and outer peripheries of the silicon steel disc 100.
The size of the connecting rib 120 may affect not only the size of the magnetic isolation groove 130 and the size of the receiving hole 140, but also the connection performance between two adjacent silicon steel blocks. In addition, the magnetism isolating groove 130 is embedded in the rotor support 300, and the size of the magnetism isolating groove 130 affects the fixing performance of the silicon steel disc 100 and the rotor support 300, and once the connection and fixing performance is poor, the output torque of the motor is affected, and even the eddy current loss of the rotor is caused.
In a preferred embodiment, the dimension of the receiving hole 140 in the axial direction of the silicon steel disc 110 is 4 times or more of the dimension of the connecting rib 120 in the axial direction of the silicon steel disc 110, at this time, the dimension of the magnetism isolating groove 130 in the axial direction of the silicon steel disc 110 is smaller and can be smaller than the dimension of the connecting rib 120 in the axial direction of the silicon steel disc 110, and under the condition that the fixing performance of the magnetism isolating groove 130 and the rotor bracket 300 is good, the connection performance of the connecting rib 120 and the silicon steel block 110 is also improved, so that the output torque of the motor is ensured, and the eddy current loss of the rotor is effectively reduced.
In another preferred embodiment, when the number of the connecting ribs 120 is two, the dimension of the magnetism isolating groove 130 in the axial direction of the silicon steel disk is smaller than the dimension of the receiving hole 140 in the axial direction of the rotor disk.
As shown in fig. 3, the silicon steel block 110 has a trapezoid shape, and the silicon steel block 110 is formed by stacking a plurality of layers of block pieces 1100 having different sizes in a height direction of the trapezoid shape. Piece portion 1100 is the arc, the trapezoidal bottom of silicon steel piece is the arc arch, in order to correspond the outer peripheral edges of silicon steel dish, the trapezoidal top of silicon steel piece is the arc recess, in order to correspond the internal periphery of silicon steel dish.
As shown in fig. 3, the connection rib 120 is formed by stacking a plurality of layers of rib portions 1200 of the same size in a radial direction of the silicon steel plate. Rib portion 1200 is the arc, splice bar 120 inboard is the arc recess, in order to correspond the internal peripheral edge of silicon steel dish, the splice bar 120 outside is the arc arch, in order to correspond the outer peripheral edge of silicon steel dish.
With continued reference to fig. 3, the rib sheet 1200 integrally connects two adjacent block sheets 1100 located at the same layer, so that two adjacent block sheets 1100 located at the same layer are connected by one rib sheet 1200. Wherein two adjacent block segments 1100 on the same layer are respectively from two different adjacent silicon steel blocks 110.
A torque transmission rod is provided in the receiving hole 140.
In summary, the silicon steel blocks 110 are connected by the connecting ribs 120 to form the integral silicon steel disc 100, and compared with the prior art in which a plurality of silicon steel blocks 110 are independently formed, the loss of the silicon steel blocks 110 is avoided, the forming efficiency of assembling the silicon steel disc 100 into a rotor disc is effectively improved, and the position consistency of each silicon steel block 110 on the rotor disc is ensured, so that the mechanical reliability of the rotor disc is greatly enhanced.
As shown in fig. 3 and 5, the present invention also provides a rotor disk of an axial flux motor, including:
an annular silicon steel disc 100, wherein the silicon steel disc 100 comprises a plurality of silicon steel blocks 110 arranged at intervals in the circumferential direction, at least two connecting ribs 130 are connected between any two adjacent silicon steel blocks 110, so that the space between two adjacent silicon steel blocks 110 is divided into magnetic isolation grooves 130 respectively arranged at two axial sides of the silicon steel disc 100, and a plurality of accommodating holes 140 positioned between the two magnetic isolation grooves 130;
the protective ring 500 is sleeved on the outer periphery of the silicon steel disc 100;
two rotor supports 300, the rotor supports 300 are respectively clamped on two axial sides of the silicon steel disc 100 to form a rotor disc, wherein the rotor supports 300 are embedded in the magnetism isolating grooves 130, and the axial end faces of the silicon steel blocks 110 are exposed.
As shown in fig. 5, the rotor holder 300 includes an inner retainer 310, an outer retainer 320, and a plurality of clips 330 connecting between the inner retainer 310 and the outer retainer 320, the plurality of clips 330 are arranged at intervals along a circumferential direction, and a receptacle 340 is formed between two adjacent clips 330, the clips 330 are embedded in the magnetism isolating groove 130, so that the silicon steel block 110 is inserted into the receptacle 340, the inner retainer 310 is sleeved on an inner periphery of the silicon steel disc 100, and the outer retainer 320 is sleeved on an outer periphery of the silicon steel disc 100.
The fixture block 330 and the magnetism isolating groove 130 have the same shape, both of which are rectangular, and the insertion hole 340 and the silicon steel block 110 have the same shape, both of which are trapezoidal. In addition, the outer end surface of the rotor holder 300 formed by the inner retainer ring 310, the outer retainer ring 320 and the fixture block 300 is a plane, and when the silicon steel block 110 is inserted into the insertion hole 340, the axial end surface of the silicon steel block 100 is flush with the outer end surface of the rotor holder 300.
Specifically, the inner retainer ring 310 and the fixture block 300 have the same dimension in the axial direction of the rotor frame, while the outer retainer ring 320 has a smaller dimension in the axial direction of the rotor frame, referring to fig. 6, two outer retainer rings 320 and a guard ring 200 are sleeved on the outer periphery of the silicon steel disc 100, and the two outer retainer rings 320 are located on two sides of the guard ring 200, and the three seal the outer periphery of the silicon steel disc 100.
As shown in fig. 2 and 3, the silicon steel block 110 has a trapezoidal shape, and the silicon steel block 110 is formed by stacking a plurality of layers of block pieces 1100 having different sizes in a height direction of the trapezoidal shape. Piece portion 1100 is the arc, the trapezoidal bottom of silicon steel piece is the arc arch, the trapezoidal top of silicon steel piece is the arc recess.
As shown in fig. 3, the dimension of the magnetism isolating groove 130 in the axial direction of the silicon steel disc 110 is smaller than the dimension of the connection rib 120 in the axial direction of the silicon steel disc 110.
As shown in fig. 5 and 6, the reluctance type axial flux motor further includes a rotating shaft 600, and the rotor disc is sleeved outside the rotating shaft 600, so that the rotating shaft 600 respectively penetrates through the centers of the rotor bracket 300 and the silicon steel disc 100, and the rotor bracket 300 and the silicon steel disc 100 are fixed by a fastener.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the scope of the present invention is not limited by the embodiments, i.e. all equivalent changes or modifications made in the spirit of the present invention are still within the scope of the present invention.
Claims (10)
1. A method for forming a rotor disc of an axial flux machine, comprising the steps of:
(a) punching and shearing a strip-shaped silicon steel sheet (1000), wherein the punched and sheared strip-shaped silicon steel sheet (1000) is provided with a plurality of block sheet parts (1100) used for rolling to form a silicon steel block (110) and a plurality of rib sheet parts (1200) used for rolling to form a connecting rib (120), and at least two rib sheet parts (1200) are connected between any two adjacent block sheet parts (1100);
(b) rolling the punched and sheared strip-shaped silicon steel sheet (1000) to form an annular silicon steel disc (100), wherein the silicon steel disc (100) comprises a plurality of silicon steel blocks (110) which are circumferentially arranged at intervals, and at least two connecting ribs (120) are connected between any two adjacent silicon steel blocks (110) so as to divide the space between the two adjacent silicon steel blocks (110) into magnetism isolating grooves (130) which are respectively arranged at two axial sides of the silicon steel disc (100) and a plurality of accommodating holes (140) which are positioned between the two magnetism isolating grooves (130);
(f) and respectively clamping rotor supports (300) at two axial sides of the silicon steel disc (100) to form a rotor disc, wherein the rotor supports (300) are embedded in the magnetism isolating grooves (130) and expose the axial end faces of the silicon steel blocks (110).
2. The method for forming the rotor disc of the axial flux motor as claimed in claim 1, wherein the rotor frame (300) includes an inner retaining ring (310), an outer retaining ring (320), and a plurality of blocks (330) connecting between the inner retaining ring (310) and the outer retaining ring (320), the plurality of blocks (330) are arranged at intervals along the circumferential direction, and a receptacle (340) is formed between two adjacent blocks (330), and further in step (f), the blocks (330) are embedded in the magnetic isolation groove (130) so that the silicon steel block (110) is inserted into the receptacle (340), the inner retaining ring (310) is sleeved on the inner periphery of the silicon steel disc (100), and the outer retaining ring (320) is sleeved on the outer periphery of the silicon steel disc (100).
3. The method of forming a rotor disc of an axial-flux electric machine according to claim 1, wherein the number of the tie bars (120) between two adjacent silicon steel blocks (110) is two, two tie bars (120) are provided at intervals in an axial direction along the silicon steel disc (100), and an axial end surface of the silicon steel block (110) is provided to protrude with respect to the tie bars (120).
4. The method of forming a rotor disk for an axial-flux electric machine according to claim 1, further comprising the steps of, between step (b) and step (f):
(e) a protective ring (500) is sleeved on the outer periphery of the silicon steel disc (100).
5. The method for forming a rotor disk of an axial-flux electric machine according to any one of claims 1 to 4, wherein the step (b) is further followed by the steps of:
(c) and providing a fixing tool (400) which is fixed on the inner and outer peripheries of the silicon steel disc (100) so as to shape and take down the silicon steel disc (100).
6. A rotor disk for an axial flux machine, comprising:
the silicon steel disc (100) comprises a plurality of silicon steel blocks (110) which are circumferentially arranged at intervals, at least two connecting ribs (130) are connected between any two adjacent silicon steel blocks (110), so that the space between the two adjacent silicon steel blocks (110) is divided into magnetism isolating grooves (130) which are respectively arranged on two axial sides of the silicon steel disc (100), and a plurality of accommodating holes (140) are formed between the two magnetism isolating grooves (130);
the protective ring (500) is sleeved on the outer periphery of the silicon steel disc (100);
the rotor disc comprises two rotor supports (300), wherein the rotor supports (300) are respectively clamped at two axial sides of the silicon steel disc (100) to form a rotor disc, the rotor supports (300) are embedded in the magnetism isolating grooves (130), and the axial end faces of the silicon steel blocks (110) are exposed.
7. The rotor disc of the axial flux machine according to claim 6, wherein the rotor frame (300) includes an inner retaining ring (310), an outer retaining ring (320), and a plurality of blocks (330) connecting between the inner retaining ring (310) and the outer retaining ring (320), the plurality of blocks (330) are arranged at intervals along a circumferential direction, and a receptacle (340) is formed between two adjacent blocks (330), the blocks (330) are embedded in the magnetic isolation groove (130) so that the silicon steel block (110) is inserted into the receptacle (340), the inner retaining ring (310) is sleeved on an inner periphery of the silicon steel disc (100), and the outer retaining ring (320) is sleeved on an outer periphery of the silicon steel disc (100).
8. Rotor disc of an axial flux machine according to claim 6, wherein the silicon steel block (110) is trapezoidal, and the silicon steel block (110) is formed by stacking a plurality of layers of block pieces (1100) of different sizes along the height direction of the trapezoid.
9. Rotor disc for an axial flux machine according to claim 8, wherein the piece part (1100) is arc-shaped, the trapezoidal bottom of the silicon steel piece is arc-shaped convex and the trapezoidal top of the silicon steel piece is arc-shaped concave.
10. Rotor disc of an axial flux machine according to claim 6, wherein the dimension of the flux barrier slot (130) in the axial direction of the silicon steel disc (110) is smaller than the dimension of the tie bar (120) in the axial direction of the silicon steel disc (110).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111610274.9A CN114268197A (en) | 2021-12-27 | 2021-12-27 | Rotor disc of axial magnetic motor and forming method |
| PCT/CN2022/093835 WO2023123827A1 (en) | 2021-12-27 | 2022-05-19 | Rotor of axial-field electric motor, rotor disk, and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111610274.9A CN114268197A (en) | 2021-12-27 | 2021-12-27 | Rotor disc of axial magnetic motor and forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114268197A true CN114268197A (en) | 2022-04-01 |
Family
ID=80830180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111610274.9A Pending CN114268197A (en) | 2021-12-27 | 2021-12-27 | Rotor disc of axial magnetic motor and forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114268197A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123827A1 (en) * | 2021-12-27 | 2023-07-06 | 浙江盘毂动力科技有限公司 | Rotor of axial-field electric motor, rotor disk, and forming method |
| WO2023213031A1 (en) * | 2022-05-06 | 2023-11-09 | 浙江盘毂动力科技有限公司 | Rotor disc, and manufacturing device and method therefor |
-
2021
- 2021-12-27 CN CN202111610274.9A patent/CN114268197A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123827A1 (en) * | 2021-12-27 | 2023-07-06 | 浙江盘毂动力科技有限公司 | Rotor of axial-field electric motor, rotor disk, and forming method |
| WO2023213031A1 (en) * | 2022-05-06 | 2023-11-09 | 浙江盘毂动力科技有限公司 | Rotor disc, and manufacturing device and method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114268197A (en) | Rotor disc of axial magnetic motor and forming method | |
| US8970085B2 (en) | Rotor for electric rotating machine and method of manufacturing the same | |
| WO2017141361A1 (en) | Rotary electric machine and method for manufacturing rotary electric machine | |
| US8581468B2 (en) | Stator for electric rotating machine | |
| US11489385B2 (en) | Rotor, rotary electric machine, and method for manufacturing rotor | |
| US9136746B2 (en) | Stator for electric rotating machine and method of manufacturing the same | |
| US8896189B2 (en) | Stator for electric rotating machine and method of manufacturing the same | |
| WO2008108520A1 (en) | Motor | |
| US20110148246A1 (en) | Stator and motor provided with the stator | |
| JP5916569B2 (en) | Rotating electric machine stator and rotating electric machine | |
| JP6353688B2 (en) | Rotating electric machine rotor and rotating electric machine equipped with the same | |
| CN216530762U (en) | Silicon steel disc of axial magnetic motor rotor | |
| CN113572286A (en) | Disc type motor rotor | |
| US11316393B2 (en) | Magnetic sheet for rotor with a non-through shaft, method of obtaining such a sheet and associated rotor | |
| CN106341015B (en) | Rotor and self-starting synchronous reluctance motor with same | |
| CN216599162U (en) | Silicon steel disc with connecting ribs | |
| CN114285199B (en) | Reluctance type axial flux motor rotor and forming method | |
| JP2014204495A (en) | Rotary electric machine and manufacturing method thereof | |
| CN114285199A (en) | Reluctance type axial flux motor rotor and forming method | |
| CN113612358B (en) | Forming method of disc type motor rotor | |
| JP5633507B2 (en) | Rotating electrical machine rotor | |
| WO2023123827A1 (en) | Rotor of axial-field electric motor, rotor disk, and forming method | |
| JPH10225031A (en) | Magnet rotor and its manufacture | |
| KR20020075993A (en) | Rotor of synchronous motor and method for manufacturing the same | |
| JP6515322B2 (en) | Stator of rotating electric machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |