CN109962595A - Ultrahigh speed magneto - Google Patents

Ultrahigh speed magneto Download PDF

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Publication number
CN109962595A
CN109962595A CN201910213511.4A CN201910213511A CN109962595A CN 109962595 A CN109962595 A CN 109962595A CN 201910213511 A CN201910213511 A CN 201910213511A CN 109962595 A CN109962595 A CN 109962595A
Authority
CN
China
Prior art keywords
protective case
cylindrical roller
mandrel
ultrahigh speed
casing
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
Application number
CN201910213511.4A
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Chinese (zh)
Inventor
高起兴
王晓琳
邵阳阳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing University of Aeronautics and Astronautics
Original Assignee
Nanjing University of Aeronautics and Astronautics
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 Nanjing University of Aeronautics and Astronautics filed Critical Nanjing University of Aeronautics and Astronautics
Priority to CN201910213511.4A priority Critical patent/CN109962595A/en
Publication of CN109962595A publication Critical patent/CN109962595A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/2713Inner rotors the magnetisation axis of the magnets being axial, e.g. claw-pole type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1737Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The invention discloses a kind of ultrahigh speed magnetoes; including casing, the protective case being arranged in casing, mandrel, Biserial cylindrical roller bearing; solid permanent magnet is provided in the protective case; protective case and mandrel are overall structure; Biserial cylindrical roller bearing is assemblied on mandrel; it is characterized by: the casing inner wall is provided with inwardly protruding structure, the outer wall of the Biserial cylindrical roller bearing is mounted on the inner wall at the inwardly protruding position of the casing.The present invention is directed to the defect of conventional rotor configuration, provides that a kind of rotor diameter is small, concentric degree is good, running accuracy is high, power density is high, the good ultrahigh speed magneto of high-speed operation performance.

Description

Ultrahigh speed magneto
Technical field
The present invention relates to electric drive technology fields, more particularly, to a kind of ultrahigh speed magneto.
Background technique
High-speed motor has the characteristics that power density is high, rotary inertia is small, can directly drive load, as high-speed drive The core component of system, structure, efficiency, reliability, precision of motor etc. determine the comprehensive performance of high-speed drive system.Tradition High speed rotor of motor structure mainly have a surface-mount type and two kinds of three-stage, it is as depicted in figs. 1 and 2 respectively.Surface-mount type rotor Structure is made of permanent magnet, mandrel and protective case.Three-stage motor rotor construction is by permanent magnet, protective case and two end axis groups At two end axis and permanent magnet are linked together by the interference fit of protective case.However two kinds of rotors all have its design feature The drawbacks of bringing.
The main drawback of surface-mount type structure has:
1. in order to generate identical magnetic flux, relative to the rotor using solid permanent-magnet structure, surface-mounted rotor structure Rotor diameter is bigger.The increase of rotor diameter will make the problems such as high speed rotor of motor intensity, windmill loss, temperature rise more prominent Out;
2. temperature of rotor can be caused to rise by windmill loss, rotor eddy current loss.However, being commonly used for the material of mandrel, such as Titanium alloy, Inconel718,40CrNiMoA etc., thermal expansion coefficient are all larger than common permanent magnet material, such as SmCo and neodymium iron Boron.Therefore when temperature increases, surface-mount type structure permanent magnet will bear to cause additional tensile stress since mandrel expansion is too fast, this will make It is more difficult to the protection of permanent magnet.
The main drawback of three stage structure has:
1. two sides mandrel portion material thermal expansion coefficient is usually above intermediate permanent magnetism isolator CTE, by windmill loss, turn When sub- eddy-current loss causes temperature to increase, two sides mandrel material expands faster relative to intermediate permanent magnet material, this will cause to protect Set declines permanent magnet protective capability;
2. in three stage structure, the connection of two sides mandrel and intermediate permanent magnet needs to guarantee very high concentricity, to component Processing, matching requirements are high, considerably increase processing, assembly difficulty.If three-stage structure assembly precision is not high, electricity will seriously affect Performance of the machine under high-speed cruising.
Summary of the invention
Goal of the invention: the technical problem to be solved in the present invention is to provide a kind of ultrahigh speed magnetoes, for conventional rotors The defect of structure, provides that a kind of rotor diameter is small, concentric degree is good, running accuracy is high, power density is high, and high-speed operation performance is good Ultrahigh speed magneto.
Technical solution: ultrahigh speed magneto of the present invention, including casing, the protective case being arranged in casing, core Axis, Biserial cylindrical roller bearing, solid permanent magnet is provided in the protective case, and protective case and mandrel are overall structure, biserial Cylinder roller bearing is assemblied on mandrel, and the casing inner wall is provided with inwardly protruding structure, the Biserial cylindrical roller bearing Outer wall be mounted on the inner wall at the inwardly protruding position of the casing.
Further, the Biserial cylindrical roller bearing includes outer ring, inner ring, cylindrical roller and retainer, it is described in Circle is coupled with mandrel, and the outer ring is by interference fit or is sticky on casing inner wall, and the cylindrical roller is mounted on Between outer ring and inner ring, cylindrical roller side is equipped with retainer.
Further, the ultrahigh speed magneto is the axially symmetric knot centered on Biserial cylindrical roller bearing Structure, the protective case two sides are equipped with the sealing axis as mechanical output mouth.
For convenience by the discharge of blind hole gas in solid permanent magnet assembling process, and be conducive to rotor heat dissipation, it is described Several axial vent holes are provided on the inside of protective case.
Further, the protective case is hollow cylinder, is interference fitted with the solid permanent magnet.
Further, the protective case and mandrel are overall structure, and material uses inconel 718 or titanium alloy.
Further, the stator in the motor uses slotless configuration, and the armature winding in the motor is in the stator Medial and lateral carry out ring-wound.
The utility model has the advantages that the present invention has following technical effect that
1. use solid magnet structure, reduce rotor diameter, thus reduce motor high speed rotation bring rotor strength, The problems such as windmill is lost.Solid permanent magnet is directly interference fitted with sheath, expanded without mandrel when temperature of rotor increases Rotor stress caused by fast increases problem;
2. the motor is center symmetrical structure, there is dual permanent-magnet, double armature winding, double-mechanical output port, operation height Effect, balance, stability are good, and output power is high;
3. protective case-mandrel overall structure is avoided through institute's band after the structures Multi-nesting such as permanent magnet, protective case, mandrel The problem of assembly precision come is poor, swelling stress disperses, greatly reduces by processing, assembling bring tolerance, ensure that rotation Precision.Bearing outer ring directly has assembly securely and the characteristic of perfect heat-dissipating with casing with one entirety of synthesis, improves product Service life;The design of integral rotor structure is expanded so that reduce product size in the case where output efficiency on an equal basis Application range.
Detailed description of the invention
Fig. 1 is existing surface-mount type high-speed motor structural schematic diagram;
Fig. 2 is existing three-stage high-speed motor structural schematic diagram;
Fig. 3 is the structural schematic diagram of ultrahigh speed magneto of the invention;
Fig. 4 is protective case and mandrel overall structure sectional view of the present invention.
Specific embodiment
The ultrahigh speed magneto of the present embodiment is double as shown in figure 3, include the inwardly protruded casing 7 of intermediate two sides inner wall Line column roller bearing is directly installed on the inner wall at the inwardly protruding position of casing 7.The Biserial cylindrical roller bearing is using double Arrange steel material cylinder rolling element, including outer ring 10, inner ring 12, cylindrical roller 11, retainer 8.The cylindrical roller is in parallel Column, can there is several, can rotate among outer ring 10 and inner ring 12 around mandrel 13.11 are equipped between the cylindrical roller Retainer 8 is filled with high speed grease in the retainer 8.The bearing outer ring 10 and casing 7 of the Biserial cylindrical roller bearing The inner wall at inwardly protruding position is coupled, and outer ring 10 can be by being interference fitted or being sticky on the casing 7.Ultrahigh speed Magneto is axially symmetric centered on Biserial cylindrical roller bearing.The two sides that protective case 4 is located at mandrel 13 are symmetrical arranged, with core Axis 13 is structure as a whole, and the material of integral structure uses non-magnetic, the material of high-tensile, such as: inconel 718, titanium close Any one of gold.Biserial cylindrical roller bearing is assemblied in the outside of mandrel 13, and mandrel 13 is coupled with inner ring 12.With biserial Centered on cylinder roller bearing, ultrahigh speed magneto further includes two sets of symmetric solid permanent magnets 5, two sets of symmetrical stators 2, and two sets Symmetrical armature winding 3, two sets of symmetrical sealing axis 1.The inside of protective case 4 is arranged in solid permanent magnet 5, and the two carries out interference and matches It closes.Under preferable case, solid permanent magnet 5 is cylinder, and protective case 4 is the hollow cylinder structure being adapted with solid permanent magnet 5. 4 outside of two sides protective case and sealing 1 interference fit of axis, and pass through end cap 6, the mechanical output as motor two sides Mouthful.Stator 2 is arranged in the inner wall of casing 7, and stator 2 can be that have slot stator may be non-groove stator, when using there is slot stator, Armature winding 3 is wound in 2 slot of stator, when using non-groove stator, armature winding 32 medial and lateral of stator into Row ring-wound.Armature winding 3 is located at the periphery of solid permanent magnet 5.
As shown in figure 4, protective case 4 opens up several axial vent holes 9 close to the inside of mandrel 13, it is traditionally arranged to be 3 to 5 A, for blind hole gas in solid 5 assembling process of permanent magnet discharge.
In the technical solution of the present invention, using cylindrical, massive permanent magnet, protective case, mandrel are integrated into integral knot Structure, mandrel assemble Biserial cylindrical roller bearing, and bearing outer ring is directly coupled with casing, avoid through permanent magnet, protection The problem of brought assembly precision is poor after set, mandrel, bearing Multi-nesting, swelling stress disperses, to promote motor high speed The performance of operating.Using Biserial cylindrical roller bearing and symmetric rotor Standard, there is compact-sized, rigid big, carrying energy The big advantage of power.Bearing outer ring is directly contacted with casing, and contact area is big, substantially increases heat dissipation performance, improves motor Service life.The motor is center symmetrical structure, has dual permanent-magnet, double armature winding, double-mechanical output port, operation height Effect, balance, stability are good, and output power is high.

Claims (7)

1. a kind of ultrahigh speed magneto, including casing (7), the protective case (4), the mandrel (13), biserial that are arranged in casing (7) Cylinder roller bearing is provided with solid permanent magnet (5) in the protective case (4), and protective case (4) and mandrel (13) are whole knot Structure, Biserial cylindrical roller bearing are assemblied on mandrel (13), it is characterised in that: casing (7) inner wall is provided with inwardly protruding Structure, the outer wall of the Biserial cylindrical roller bearing are mounted on the inner wall at the casing (7) inwardly protruding position.
2. ultrahigh speed magneto according to claim 1, it is characterised in that: the Biserial cylindrical roller bearing includes Outer ring (10), inner ring (12), cylindrical roller (11) and retainer (8), the inner ring (12) is coupled with mandrel (13), described Outer ring (10) by interference fit or be sticky on casing (7) inner wall, the cylindrical roller (11) be mounted on outer ring (10) and Between inner ring (12), cylindrical roller (11) side is equipped with retainer (8).
3. according to claim 1 with 2 described in any item ultrahigh speed magnetoes, it is characterised in that: the ultrahigh speed permanent magnetism Motor is the axially symmetric structure centered on Biserial cylindrical roller bearing, and protective case (4) two sides are equipped with as machinery The sealing axis (1) of output port.
4. ultrahigh speed magneto according to claim 3, it is characterised in that: the inside of the protective case (4) is arranged There are several axial vent holes (9).
5. ultrahigh speed magneto according to claim 3, it is characterised in that: the protective case (4) is hollow cylinder Shape is interference fitted with the solid permanent magnet (5).
6. ultrahigh speed magneto according to claim 3, it is characterised in that: the protective case (4) is with mandrel (13) Overall structure, overall structure material use inconel 718 or titanium alloy.
7. ultrahigh speed magneto according to claim 3, it is characterised in that: the stator (2) in the motor uses nothing Slot structure, the armature winding (3) in the motor carry out ring-wound in the stator medial and lateral.
CN201910213511.4A 2019-03-20 2019-03-20 Ultrahigh speed magneto Pending CN109962595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910213511.4A CN109962595A (en) 2019-03-20 2019-03-20 Ultrahigh speed magneto

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910213511.4A CN109962595A (en) 2019-03-20 2019-03-20 Ultrahigh speed magneto

Publications (1)

Publication Number Publication Date
CN109962595A true CN109962595A (en) 2019-07-02

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113328547A (en) * 2021-05-12 2021-08-31 南京航空航天大学 Ultra-high-speed micro permanent magnet motor
CN114042946A (en) * 2021-11-26 2022-02-15 南方科技大学 Mandrel of ultrahigh-speed air static pressure spindle
CN114094736A (en) * 2021-11-15 2022-02-25 珠海格力电器股份有限公司 Motor rotor and manufacturing method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62119182U (en) * 1985-09-07 1987-07-29
CN105471137A (en) * 2016-01-11 2016-04-06 珠海格力节能环保制冷技术研究中心有限公司 Rotating shaft structure of permanent magnet motor and assembling method of the rotating shaft structure
CN107086705A (en) * 2017-05-27 2017-08-22 杭州驰创机械有限公司 A kind of brushless, permanently high-speed electric expreess locomotive of use integral bearing
CN208479438U (en) * 2018-07-20 2019-02-05 湖南易特机电科技有限公司 The latent oil of underground cartridge type operation directly drives the ultra-fine long high performance permanent magnetic synchronous motor of pump
CN209731028U (en) * 2019-03-20 2019-12-03 南京航空航天大学 Ultrahigh speed magneto

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62119182U (en) * 1985-09-07 1987-07-29
CN105471137A (en) * 2016-01-11 2016-04-06 珠海格力节能环保制冷技术研究中心有限公司 Rotating shaft structure of permanent magnet motor and assembling method of the rotating shaft structure
CN107086705A (en) * 2017-05-27 2017-08-22 杭州驰创机械有限公司 A kind of brushless, permanently high-speed electric expreess locomotive of use integral bearing
CN208479438U (en) * 2018-07-20 2019-02-05 湖南易特机电科技有限公司 The latent oil of underground cartridge type operation directly drives the ultra-fine long high performance permanent magnetic synchronous motor of pump
CN209731028U (en) * 2019-03-20 2019-12-03 南京航空航天大学 Ultrahigh speed magneto

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113328547A (en) * 2021-05-12 2021-08-31 南京航空航天大学 Ultra-high-speed micro permanent magnet motor
CN114094736A (en) * 2021-11-15 2022-02-25 珠海格力电器股份有限公司 Motor rotor and manufacturing method thereof
CN114094736B (en) * 2021-11-15 2023-02-17 珠海格力电器股份有限公司 Motor rotor and manufacturing method thereof
CN114042946A (en) * 2021-11-26 2022-02-15 南方科技大学 Mandrel of ultrahigh-speed air static pressure spindle
CN114042946B (en) * 2021-11-26 2022-09-27 南方科技大学 Dabber of hypervelocity air static electricity main shaft

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