WO2019150500A1 - Élément de rotor, rotor et dispositif électrique rotatif - Google Patents

Élément de rotor, rotor et dispositif électrique rotatif Download PDF

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Publication number
WO2019150500A1
WO2019150500A1 PCT/JP2018/003256 JP2018003256W WO2019150500A1 WO 2019150500 A1 WO2019150500 A1 WO 2019150500A1 JP 2018003256 W JP2018003256 W JP 2018003256W WO 2019150500 A1 WO2019150500 A1 WO 2019150500A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
rotor
shaft
permanent magnets
rotor member
Prior art date
Application number
PCT/JP2018/003256
Other languages
English (en)
Japanese (ja)
Inventor
佳樹 岡田
由晴 ▲高▼島
勇樹 工藤
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2018566985A priority Critical patent/JP6505345B1/ja
Priority to PCT/JP2018/003256 priority patent/WO2019150500A1/fr
Publication of WO2019150500A1 publication Critical patent/WO2019150500A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets

Definitions

  • the present invention relates to a rotor member using a permanent magnet as a field, a rotor, and a synchronous rotating electric machine.
  • the rotor used in a synchronous rotating electric machine has a structure in which a rotor member is attached to a shaft.
  • the rotor member has a structure in which a permanent magnet is fixed to a sleeve into which a shaft is inserted.
  • a permanent magnet is fixed to a sleeve into which a shaft is inserted.
  • Patent Document 1 the permanent magnet attached to the outer peripheral surface of the sleeve is covered with a protective cover made of a high-strength synthetic material such as carbon fiber reinforced plastic so that the permanent magnet is removed from the sleeve by centrifugal force during high-speed rotation.
  • a protective cover made of a high-strength synthetic material such as carbon fiber reinforced plastic
  • the frictional force between the permanent magnet and the outer peripheral surface of the sleeve depends on the interference when the shaft is inserted into the sleeve. That is, the larger the outer diameter of the press-fitted shaft is, the larger the interference is, the stronger the permanent magnet is pressed against the reinforcing member, and the greater the frictional force between the permanent magnet and the outer peripheral surface of the sleeve.
  • the value to be set for the interference when the shaft is inserted into the sleeve inevitably increases.
  • the amount of deformation of the sleeve increases.
  • a large shearing force acts on a fixing member such as an adhesive that fills the gap between the sleeve and the permanent magnet. If the shearing force exceeds the strength of the joining member, it will break, and hinder the improvement of the joining strength between the sleeve and the permanent magnet.
  • Patent Document 1 since a crimping margin is added by press-fitting a tapered shaft into the sleeve, inevitably deformation occurs on the outer peripheral surface side of the sleeve after press-fitting the shaft. There is a risk of hindering the improvement of the bonding strength between the magnet and the permanent magnet. In order to suppress the deformation amount of the sleeve, it is conceivable to reduce the interference. However, for the reasons described above, reducing the interference allowance becomes a factor that limits the rotational speed of use, and hinders high-speed rotation of the motor.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain a rotor member in which a permanent magnet is prevented from falling off a sleeve during high-speed rotation.
  • the present invention provides a sleeve having a cylindrical shape into which a shaft can be press-fitted, and a continuous groove formed on the outer peripheral surface over the entire circumference.
  • a plurality of permanent magnets arranged.
  • the present invention is provided between a side surface of a groove and axial end portions of a plurality of permanent magnets, a fixing member that sandwiches both end portions of the plurality of permanent magnets, and a reinforcing member that covers the plurality of permanent magnets from the radially outer side With.
  • the rotor member according to the present invention has an effect that the permanent magnet can be prevented from falling off the sleeve during high-speed rotation.
  • FIG. 1 is a longitudinal sectional view of a rotary electric machine according to Embodiment 1 of the present invention.
  • 1 is a longitudinal sectional view of a rotor member according to Embodiment 1.
  • FIG. Cross-sectional view of rotor member according to Embodiment 1 The longitudinal cross-sectional view which showed the aspect of the stress generation at the time of press-fitting a shaft to the rotor of the rotor member which concerns on Embodiment 1.
  • Cross-sectional view showing a state of stress generation when a shaft is press-fitted into the rotor of the rotor member according to the first embodiment
  • the schematic diagram which showed the aspect after pressing the shaft into the sleeve of the rotor member which concerns on Embodiment 1.
  • FIG. 1 The schematic diagram which showed the stress which acts when a shaft is press-fit in the sleeve of the rotor member which concerns on Embodiment 1.
  • FIG. 2 The schematic diagram of the rotor using the rotor member which concerns on Embodiment 2 of this invention.
  • FIG. 1 is a longitudinal sectional view of a rotating electrical machine according to Embodiment 1 of the present invention.
  • FIG. 2 is a longitudinal sectional view of the rotor member according to the first embodiment.
  • FIG. 3 is a cross-sectional view of the rotor member according to the first embodiment. 2 shows a cross section taken along the line II-II in FIG.
  • FIG. 3 shows a cross section taken along line III-III in FIG.
  • the rotating electrical machine 1a according to the first embodiment is capable of rotating inwardly in the radial direction of the stator 9, a housing 10b having an internal space 10a, an annular stator 9 that is stationary and fixed in the internal space 10a of the housing 10b. And a rotor 1b installed on the machine.
  • the stator 9 has a stator core 7 and a plurality of coils 8 that are spaced apart from each other in the circumferential direction of the stator core 7.
  • the stator core 7 can be formed by laminating thin magnetic steel sheets, but is not limited thereto. Electric power is transmitted to the plurality of coils 8 through a power line 81 connected to a power source installed outside the rotating electrical machine 1a.
  • the rotor 1b is used in a surface permanent magnet type synchronous rotating electrical machine 1a, also referred to as an SPM (Surface Permanent Magnet) type.
  • the rotor 1 b includes a rotor member 60 that is a cylindrical structure, and a shaft 2 that penetrates the rotor member 60.
  • the rotor member 60 includes a cylindrical sleeve 31, a plurality of permanent magnets 4 a, 4 b, 4 c, 4 d attached to the sleeve 31 so as to be arranged in the circumferential direction, and permanent magnets 4 a, 4 b, 4 c, 4 d.
  • the gap members 5a, 5b, 5c, and 5d disposed in the gap and the reinforcing members 6 that cover the outer sides of the permanent magnets 4a, 4b, 4c, and 4d and the gap members 5a, 5b, 5c, and 5d are provided.
  • the permanent magnets 4a, 4b, 4c, 4d are rare earth magnets or ferrite magnets.
  • the sleeve 31 is made of a magnetic metal material such as structural carbon steel. Further, a flange portion 3c is formed at one end portion of the sleeve 31 to prevent the sleeve 31 itself from buckling and deforming due to stress concentration when the shaft 2 is inserted. On the outer peripheral surface 3e of the sleeve 31, a groove 3f that is continuous over the entire circumference in the circumferential direction is formed, and the permanent magnets 4a, 4b, 4c, 4d and the gap members 5a, 5b, 5c, 5d are formed in the groove 3f. It is installed on the bottom.
  • the sleeve 31 is formed with a through hole 3a penetrating in a direction along the central axis AX.
  • the inner peripheral surface 3b of the sleeve 31 forming the through hole 3a has a tapered shape.
  • the shaft 2 matching the shape of the inner peripheral surface 3b is press-fitted into the through hole 3a of the sleeve 31.
  • the shaft 2 may be fixed to the through hole 3a of the sleeve 31 by combining shrink fitting or cold fitting and press fitting.
  • the direction along the central axis AX is referred to as “axial direction”.
  • the shaft 2 of the illustrated rotor member 60 has the hollow hole 2a, the present invention is not limited to this, and the shaft 2 may be a solid shaft.
  • the plurality of permanent magnets 4a, 4b, 4c, 4d and the gap members 5a, 5b, 5c, 5d are bonded to the sleeve 31 with an adhesive.
  • four permanent magnets 4a, 4b, 4c, 4d and four gap members 5a, 5b, 5c, 5d are arranged at equal intervals in the circumferential direction.
  • the cross-sectional shapes of the permanent magnets 4a, 4b, 4c, 4d and the gap members 5a, 5b, 5c, 5d are the difference between the sectors cut out from two circles having different radii at the same central angle. This is the shape. Therefore, the permanent magnets 4a, 4b, 4c, 4d and the gap members 5a, 5b, 5c, 5d are both arcuate on the inner side and the outer side in the cross section.
  • the illustrated rotor member 60 includes four permanent magnets 4a, 4b, 4c, and 4d. However, the number of permanent magnets can be increased or decreased according to the number of poles, and is limited to the four illustrated. It is not something.
  • the flange portion 3c and the permanent magnets 4a, 4b, 4c, and 4d may be installed with a space therebetween or in close contact with each other. However, when the flange portion 3c and the permanent magnets 4a, 4b, 4c, and 4d are brought into close contact with each other, it is necessary to consider magnetic flux leakage from the permanent magnets 4a, 4b, 4c, and 4d through the flange portion 3c.
  • the gap members 5a, 5b, 5c and 5d are preferably formed of a material having a specific gravity close to that of the permanent magnets 4a, 4b, 4c and 4d.
  • the gap members 5a, 5b, 5c, and 5d are preferably formed of a non-magnetic material in consideration of the magnetic flux short-circuit loss in the sleeve 31 and the gap members 5a, 5b, 5c, and 5d, but the magnetic flux short-circuit loss can be allowed. In this case, it is not necessary to use a nonmagnetic material.
  • the gap members 5a, 5b, 5c, and 5d can be formed of stainless steel, aluminum alloy, copper alloy, iron alloy, or resin, but are not limited thereto.
  • the longitudinal sectional shapes of the permanent magnets 4a, 4b, 4c, 4d and the gap members 5a, 5b, 5c, 5d are rectangular.
  • the axial lengths of the permanent magnets 4a, 4b, 4c, 4d and the gap members 5a, 5b, 5c, 5d are shorter than the axial length of the sleeve 31.
  • the reinforcing member 6 suppresses the permanent magnets 4 a, 4 b, 4 c, 4 d and the gap members 5 a, 5 b, 5 c, 5 d from being peeled from the sleeve 31 due to centrifugal force during high-speed rotation.
  • the gap members 5a, 5b, 5c, 5d are installed for the purpose of improving workability of the work of attaching the permanent magnets 4a, 4b, 4c, 4d and equalizing the stress applied to the reinforcing member 6. If the stress applied to the reinforcing member 6 is less than the fatigue strength of the reinforcing member 6, it can be omitted.
  • the inner peripheral surface 3b of the sleeve 31 is a first tapered surface that is further away from the central axis AX as it is farther from the flange portion 3c in the axial direction.
  • the taper angle ⁇ of the inner peripheral surface 3b of the sleeve 31 varies depending on the rotational speed of the rotor 1b when the rotary electric machine 1a is operated and the required interference, but in the range of 0 ° to 10 ° in consideration of workability. It is preferable to set.
  • the taper angle ⁇ is an angle formed by the central axis AX and the inner peripheral surface 3b of the sleeve 31.
  • the rotor member 60 includes fixing members 51a and 51b that fill the gaps between the side surface of the groove 3f of the outer peripheral surface 3e and the permanent magnets 4a, 4b, 4c, and 4d and the gap members 5a, 5b, 5c, and 5d.
  • the fixing members 51a and 51b are annular members.
  • the fixing members 51a and 51b can be formed using a resin material or a sintered metal, but are not limited to these materials.
  • the fixing members 51a and 51b are solidified adhesives filled in the gaps between the side surface of the groove 3f of the outer peripheral surface 3e and the permanent magnets 4a, 4b, 4c and 4d and the gap members 5a, 5b, 5c and 5d. There may be.
  • FIG. 4 is a longitudinal sectional view showing a state of stress generation when the shaft is press-fitted into the rotor of the rotor member according to the first embodiment.
  • FIG. 5 is a cross-sectional view showing an aspect of stress generation when the shaft is press-fitted into the rotor of the rotor member according to the first embodiment.
  • FIG. 4 shows a cross section taken along line IV-IV in FIG.
  • the sleeve 31 is deformed in a direction in which the inner diameter and the outer diameter are enlarged, and the permanent magnets 4a, 4b, 4c are provided on the sleeve 31 and the reinforcing member 6. , 4d are generated in the radial direction 11a, 11b.
  • FIG. 6 is a schematic view showing an aspect after the shaft is press-fitted into the sleeve of the rotor member according to the first embodiment. Due to the circumferential deformations 12a and 12b of the sleeve 31 due to the press-fitting of the shaft 2, a large shear stress acts on the adhesive layer 21, and cracks 13a and 13b are likely to occur. When the cracks 13a and 13b are generated in the adhesive layer 21, the holding force of the permanent magnets 4a, 4b, 4c, and 4d by the adhesive layer 21 is lowered, and the reliability is also lowered.
  • FIG. 7 is a schematic diagram showing the stress acting when the shaft is press-fitted into the sleeve of the rotor member according to the first embodiment.
  • the groove 3f on the outer peripheral surface 3e of the sleeve 31 is deformed by the radial stresses 11a and 11b caused by the press-fitting of the shaft 2, but the axial position is not changed, so that the permanent magnets 4a, 4b, 4c and 4d are fixed. It is stably held by the axial stresses 14a and 14b that support the members 51a and 51b.
  • the permanent magnets 4a, 4b, 4c, and 4d are held by the reaction of the force that the permanent magnets 4a, 4b, 4c, and 4d and the sleeve 31 sandwich the fixing member 51a. Is done.
  • the rotary electric machine provided with the rotor 1b which can be rotated at high speed can be provided by using the rotor member 60 which concerns on Embodiment 1.
  • the sleeve 31 includes the flange portion 3c on one end side, but may also include a flange portion on the other end side.
  • FIG. 8 is a longitudinal sectional view of another rotor member according to the first embodiment.
  • the sleeve 31 includes a flange portion 3d on the other end side in addition to the flange portion 3c on the one end side.
  • the sleeve 31 includes the flange portions 3c and 3d, it is possible to suppress the outer diameter of the sleeve 31 from being different depending on the position in the axial direction, and thus it is possible to suppress deterioration of the characteristics of the rotating electrical machine 1a. Further, if the sleeve 31 has a thickness that does not buckle and deform when the shaft 2 is press-fitted, it is possible to adopt a structure in which the flange portion 3c is omitted.
  • FIG. FIG. 9 is a schematic diagram of a rotor using a rotor member according to Embodiment 2 of the present invention.
  • the inner peripheral surface 3b of the sleeve 31 is a tapered surface that is farther from the central axis AX toward one end where the flange portion 3c is provided, and the inner peripheral side on the one end side of the sleeve 31 is inclined more than the inner peripheral surface 3b.
  • the taper increasing portion 3g which is a large tapered surface is provided. That is, on the inner peripheral side of the sleeve 31, a taper increasing portion 3g is provided at an end that is forward in the press-fitting direction of the shaft 2.
  • the angle difference between the taper surfaces of the inner peripheral surface 3b and the taper increasing portion 3g is ⁇ .
  • the taper increasing portion 3g By providing the taper increasing portion 3g, the end portion of the sleeve 31 which is the front in the press-fitting direction of the shaft 2 is deformed when the shaft 2 is press-fitted as compared with the portion where the taper increasing portion 3g is not provided. Becomes larger. Therefore, by providing the taper increasing portion 3g, the axial stresses 14a and 14b acting on the fixing member 51a are larger than those of the rotor according to the first embodiment. Thereby, the force which fixes permanent magnet 4a, 4b, 4c, 4d increases rather than the rotor which concerns on Embodiment 1. FIG.
  • the rotor according to the second embodiment can be rotated at high speed because the permanent magnets 4a, 4b, 4c, and 4d are prevented from falling off the sleeve 31 during high-speed rotation.
  • FIG. FIG. 10 is a schematic diagram of a rotor member according to Embodiment 3 of the present invention.
  • the shaft 2 is provided with an enlarged shaft diameter portion 2b having an enlarged shaft diameter.
  • the shaft diameter enlarged portion 2 b is disposed at the end of the sleeve 31 that is rearward in the press-fitting direction.
  • the end of the sleeve 31 that is the rear in the press-fitting direction of the shaft 2 has a larger deformation amount than when a shaft not provided with the shaft diameter enlarged portion 2b is press-fitted. . Therefore, by providing the shaft diameter enlarged portion 2b, the axial stresses 14a and 14b acting on the fixing member 51b are larger than those of the rotor according to the first embodiment. Thereby, in the rotor which concerns on Embodiment 3, the force which fixes permanent magnet 4a, 4b, 4c, 4d increases more than the rotor which concerns on Embodiment 1.
  • the rotor according to the third embodiment can be rotated at a high speed because the permanent magnets 4a, 4b, 4c, and 4d are prevented from falling off the sleeve 31 during the high-speed rotation.
  • FIG. 11 is a schematic diagram of a rotor member according to Embodiment 4 of the present invention.
  • the rotor member 60 according to Embodiment 4 includes spacers 50a and 50b that cover the ends of the permanent magnets 4a, 4b, 4c, and 4d.
  • spacers 50a and 50b that cover the ends of the permanent magnets 4a, 4b, 4c, and 4d.
  • the end surfaces of the permanent magnets 4a, 4b, 4c, 4d are protected and workability when directly winding the reinforcing member 6 is increased. Can be improved.
  • a ring-shaped spacer 50b is also installed at the end opposite to the end where the flange portion 3c is provided.
  • the spacers 50a and 50b are preferably non-magnetic materials in consideration of magnetic flux leakage from the permanent magnets 4a, 4b, 4c and 4d.
  • the rotor member 60 according to the fourth embodiment can suppress the permanent magnets 4a, 4b, 4c, and 4d from dropping from the sleeve 31 during high-speed rotation. Furthermore, in the rotor member 60 according to the fourth embodiment, the spacers 50a and 50b cover the ends of the permanent magnets 4a, 4b, 4c, and 4d, thereby preventing the permanent magnets 4a, 4b, 4c, and 4d from being corroded. Therefore, environmental resistance can be improved.
  • the configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
  • 1a rotating electrical machine 1b rotor, 2 shaft, 2a hollow hole, 2b shaft diameter enlarged portion, 3a through hole, 3b inner peripheral surface, 3c, 3d flange portion, 3e outer peripheral surface, 3f groove, 3g taper increasing portion, 4a, 4b, 4c, 4d permanent magnet, 5a, 5b, 5c, 5d gap member, 6 reinforcing member, 7 stator core, 8 coil, 9 stator, 10a internal space, 10b housing, 31 sleeve, 50a, 50b spacer, 51a , 51b fixing member, 60 rotor member, 81 power line.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un élément de rotor (60) comprenant : un manchon (31) qui est une forme cylindrique qui permet à un arbre d'être ajusté par pression à l'intérieur de celui-ci, et qui comporte une rainure (3F) formée dans la surface périphérique externe (3e), en continu sur toute la circonférence dans la direction circonférentielle ; de multiples aimants permanents (4a, 4c) qui sont agencés dans la rainure (3f) ; des éléments de fixation (51a, 51b) qui sont disposés entre les surfaces latérales de la rainure (3f) et les extrémités des aimants permanents (4a, 4c) dans la direction axiale et qui prennent en sandwich les deux extrémités des aimants permanents (4a, 4c) ; et un élément de renforcement (6) qui recouvre les multiples aimants permanents (4a, 4c) depuis l'extérieur dans la direction radiale.<u /> <u />
PCT/JP2018/003256 2018-01-31 2018-01-31 Élément de rotor, rotor et dispositif électrique rotatif WO2019150500A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2018566985A JP6505345B1 (ja) 2018-01-31 2018-01-31 回転子部材、回転子及び回転電機
PCT/JP2018/003256 WO2019150500A1 (fr) 2018-01-31 2018-01-31 Élément de rotor, rotor et dispositif électrique rotatif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/003256 WO2019150500A1 (fr) 2018-01-31 2018-01-31 Élément de rotor, rotor et dispositif électrique rotatif

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WO2019150500A1 true WO2019150500A1 (fr) 2019-08-08

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022030233A1 (fr) * 2020-08-05 2022-02-10 株式会社Ihi Rotor, moteur et procécé de production de rotor
WO2023162171A1 (fr) * 2022-02-25 2023-08-31 三菱重工エンジン＆ターボチャージャ株式会社 Rotor, machine électrique rotative, compresseur électrique et procédé de production de rotor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017130295A1 (fr) * 2016-01-26 2017-08-03 三菱電機株式会社 Rotor pour machine électrique rotative, machine électrique rotative et élément de rotor pour machine électrique rotative
JP2017195751A (ja) * 2016-04-22 2017-10-26 ファナック株式会社 保持部材、これを備える回転電機の回転子、及びそれを備える回転電機

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62203537A (ja) * 1986-02-28 1987-09-08 Hitachi Ltd 電動機用回転子
JP2002272034A (ja) * 2001-03-07 2002-09-20 Isuzu Ceramics Res Inst Co Ltd マグネットロータ及びそれを備えた高出力交流機
JP2017169373A (ja) * 2016-03-16 2017-09-21 三菱電機株式会社 回転子部材及び回転電機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017130295A1 (fr) * 2016-01-26 2017-08-03 三菱電機株式会社 Rotor pour machine électrique rotative, machine électrique rotative et élément de rotor pour machine électrique rotative
JP2017195751A (ja) * 2016-04-22 2017-10-26 ファナック株式会社 保持部材、これを備える回転電機の回転子、及びそれを備える回転電機

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022030233A1 (fr) * 2020-08-05 2022-02-10 株式会社Ihi Rotor, moteur et procécé de production de rotor
JPWO2022030233A1 (fr) * 2020-08-05 2022-02-10
JP7476968B2 (ja) 2020-08-05 2024-05-01 株式会社Ihi ロータ、モータ、及びロータの製造方法
WO2023162171A1 (fr) * 2022-02-25 2023-08-31 三菱重工エンジン＆ターボチャージャ株式会社 Rotor, machine électrique rotative, compresseur électrique et procédé de production de rotor

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