CN106825627A - A kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle - Google Patents

A kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle Download PDF

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Publication number
CN106825627A
CN106825627A CN201710079793.4A CN201710079793A CN106825627A CN 106825627 A CN106825627 A CN 106825627A CN 201710079793 A CN201710079793 A CN 201710079793A CN 106825627 A CN106825627 A CN 106825627A
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China
Prior art keywords
radial
magnetic bearing
hybrid magnetic
sextupole
axial
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Pending
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CN201710079793.4A
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Chinese (zh)
Inventor
朱熀秋
鞠金涛
吴熙
陆荣华
丁泉
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Jiangsu University
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Jiangsu University
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Priority to CN201710079793.4A priority Critical patent/CN106825627A/en
Publication of CN106825627A publication Critical patent/CN106825627A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70Stationary or movable members for carrying working-spindles for attachment of tools or work

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

The present invention discloses a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supporting electro spindle, the middle part of rotating shaft is that sextupole radial-axial hybrid magnetic bearing, rear side are sextupole radial hybrid magnetic bearings equipped with motor, on front side of motor, rotating shaft and the rotor of sextupole radial-axial hybrid magnetic bearing and the rotor of sextupole radial hybrid magnetic bearing is concentric is fixedly connected;Five frees degree of rotating shaft are supported using a sextupole radial-axial hybrid magnetic bearing and a sextupole radial hybrid magnetic bearing, make rotating shaft friction-free rotary, sextupole radial-axial hybrid magnetic bearing and sextupole radial hybrid magnetic bearing all provide biasing magnetic flux by permanent magnet, substantially reduce power consumption, sextupole radial-axial hybrid magnetic bearing uses sextupole structure in radial direction, so that the non-linear and coupling of suspension force characteristic is greatly reduced, it is easier to realize precise control.

Description

A kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle
Technical field
The invention belongs to Electrified Transmission field, it is related to a kind of motorized spindle supported with AMB, particularly a kind of five degree of freedom mixing magnetic Bearing supports electro spindle, it is adaptable to high speed, ultrahigh speed, high-precision Digit Control Machine Tool.
Background technology
When electro spindle rotating speed is high, traditional contact bearing rubs due to existing, and brings main shaft temperature rise, produces heat A series of problems, such as deformation, vibration are strengthened, bearing life is greatly shortened.Magnetic suspension bearing(Abbreviation magnetic bearing)Will using electromagnetic force Rotor suspension makes to be not in contact between rotor and stator in aerial, with without friction, without abrasion, without lubricating oil, rotating speed can be supported High, rotor displacement can dynamic regulation, rotating accuracy high, long lifespan the advantages of, be especially suitable for high-speed electric main shaft at a high speed, it is high-precision Degree, long-life requirement, and real-time monitoring can be carried out with countershaft position, it is also possible to countershaft vibration carries out active suppression. Magnetic bearing can be divided into Simple Freedom Magnetic Bearing according to the number of degrees of freedom, that can be controlled(Axial magnetic bearing), two degrees of freedom magnetic bearing (Radial direction magnetic bearing)With Three Degree Of Freedom magnetic bearing(Radial-axial magnetic bearing).The mode produced according to suspending power can be divided into master Dynamic magnetic bearing(Suspending power is produced by coil current), passive magnetic bearing(Suspending power is produced by permanent magnet)And hybrid magnetic bearing(It is outstanding Buoyancy is produced jointly by permanent magnet and coil current).
Quadrupole or the magnetic of ends of the earth structure that the research of current motorized spindle supported with AMB mostly drives for amplidyne Bearing, and the volume of amplidyne is big, power consumption is big, circuit needs special design, high cost, therefore Chinese patent application Number for CN200810234272 document in disclose it is a kind of exchange magnetic bearing supporting high speed electric principal shaft system, exchange magnetic bearing Driven by three-phase power inverter, three-phase inverter is low in energy consumption, technology maturation, low cost, and has special control chip, because This can substantially reduce the construction cycle, but the electro spindle uses three pole magnetic bearings of active form, three pole active magnetic bearings Coil is not only needed to provide bias magnetic field, volume is big, and power consumption is big, and its non-linear and coupling is very strong, is unfavorable for accurate control System.
The content of the invention
The invention aims to the suspension force characteristic for reducing power consumption, improve bearing capacity, improve five degree of freedom magnetic bearing, So as to improve control accuracy, it is proposed that a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle.
The technical scheme that a kind of present invention inverter driving ejector half five degree of freedom hybrid magnetic bearing supporting electro spindle is used is:Bag Include a rotating shaft, the middle part of rotating shaft is equipped with being that sextupole radial-axial hybrid magnetic bearing, rear side are sextupoles on front side of motor, motor The rotor and the rotor of sextupole radial hybrid magnetic bearing of radial hybrid magnetic bearing, rotating shaft and sextupole radial-axial hybrid magnetic bearing It is concentric to be fixedly connected.
The rotor coaxial of sextupole radial-axial hybrid magnetic bearing is enclosed within the radial direction being made up of radial stator yoke and magnet radial poles The center of stator, radial stator yoke 6 magnet radial poles evenly distributed in the circumferential direction wind radially in each magnet radial poles Control coil, aspectant two radial direction control coils winding direction is consistent and connects;Radial stator fixed sleeves connect annular Permanent magnet, permanent magnet fixed sleeves connect axial stator;Axial stator is that two ends have the columnar structured of disk end cap, disk The center of end cap extends axial pole to the corresponding direction of both ends of rotor;It is each by both sides before and after radial stator to set one Individual axial control coil, two axial control coils are serially connected.
Stator is coaxially cased with outside the rotor of sextupole radial hybrid magnetic bearing, stator is by stator yoke, three active magnetic poles and three Individual permanent magnetism magnetic pole composition, active magnetic pole and the interlaced arrangement of permanent magnetism magnetic pole, are wound with a control on each active magnetic pole Coil, one piece of permanent magnet is inlayed in fixation in the middle of each permanent magnetism magnetic pole.
Compared with prior art, the advantage of the invention is that:The present invention uses a sextupole radial-axial hybrid magnetic bearing Five frees degree of rotating shaft are supported with a sextupole radial hybrid magnetic bearing, makes rotating shaft friction-free rotary, be conducive to rotating speed Lifting.And sextupole radial-axial hybrid magnetic bearing and sextupole radial hybrid magnetic bearing all provide biasing magnetic flux by permanent magnet, greatly Big to reduce power consumption, sextupole radial-axial hybrid magnetic bearing uses sextupole structure in radial direction, mixed with existing inverter-driven Close magnetic bearing to compare so that the non-linear and coupling of suspension force characteristic is greatly reduced, it is easier to is realized precise control, is radially used Three-phase power inverter drives, and reduces the volume and cost of drive system.
Brief description of the drawings
Fig. 1 is that a kind of overall structure of inverter driving ejector half five degree of freedom hybrid magnetic bearing supporting electro spindle of the invention is illustrated Figure;
Fig. 2 is the radial structure schematic diagram of sextupole radial-axial hybrid magnetic bearing in Fig. 1;
Fig. 3 is the axial arrangement schematic diagram of sextupole radial-axial hybrid magnetic bearing in Fig. 2;
Fig. 4 is the radial structure schematic diagram of sextupole radial hybrid magnetic bearing in Fig. 1;
Fig. 5 is the axial arrangement schematic diagram of sextupole radial hybrid magnetic bearing in Fig. 4;
In figure:1. rotating shaft;2. motor;3. sextupole radial-axial hybrid magnetic bearing;4. sextupole radial hybrid magnetic bearing;5. displacement Sensor;6. casing;7. auxiliary bearing;8. end cap;9. rosette;31. rotors;32. axial stators;33. radial stators; 34. radial direction control coils;35. axial control coils;36. permanent magnets;41. active magnetic poles;42. permanent magnetism magnetic poles;43. stator yokes; 44. control coils;45. permanent magnets;46. rotors;91. biasing magnetic fluxs;92. axially control magnetic field;93. radially control magnetic flux; 321. axial poles;322. disk end caps;331. radial stator yokes;332. magnet radial poles.
Specific embodiment
As shown in figure 1, the present invention includes rotating shaft 1, high-speed electric expreess locomotive 2, sextupole radial-axial hybrid magnetic bearing 3, sextupole radially Hybrid magnetic bearing 4, displacement transducer 5, casing 6 and auxiliary bearing 7 are constituted.Outside is casing 6, and the rear and front end of casing 6 respectively connects An end cap 8 is connect, coaxial heart installs rotating shaft 1 at the inside center axle of casing 6, one end of rotating shaft 1 is connected with cutter, be electricity The front end of main shaft.An auxiliary bearing 7 is respectively co-axially mounted in two centers of end cap 8 of front-end and back-end, rotating shaft 1 is coaxially passed through Two auxiliary bearings 7, auxiliary bearing 7 is used for the countershaft 1 under shutdown or magnetic bearing malfunction and is supported.In casing 6 Portion, installs 2, sextupole radial-axial hybrid magnetic bearing 3 of a high-speed electric expreess locomotive in rotating shaft 1 and a sextupole radially mixes Magnetic bearing 4, motor 2 is arranged on the middle part of rotating shaft 1, and sextupole radial-axial hybrid magnetic bearing 3 is in the front side of high-speed electric expreess locomotive 2, sextupole Rear side of the radial hybrid magnetic bearing 4 in high-speed electric expreess locomotive 2.The housing of motor 2 is fixed on casing 6.Rotating shaft 1 and sextupole radial direction-axle It is fixed together to the rotor of hybrid magnetic bearing 3 and the coaxial heart of the rotor of sextupole radial hybrid magnetic bearing 4.In rotating shaft A displacement transducer 5 is also respectively installed in 1 front-end and back-end, and displacement transducer 5 is close to two end caps 8, before detecting rotating shaft 1 End and the radial displacement of rear end.A rosette 9 is installed in the rear end of other rotating shaft 1, the axial position for coordinating detection rotating shaft 1 Move.
As shown in Figures 2 and 3, sextupole radial-axial hybrid magnetic bearing 3 is by rotor 31, axial stator 32, radial stator 33rd, radial direction control coil 34, axial control coil 35 and permanent magnet 36 are constituted.The coaxial sleeve of rotor 31 is at the center of radial stator 33 Place, and leave radial air gap between rotor 31 and radial stator 33.Together with rotor 46 is fixedly and coaxially connected with rotating shaft 1.Footpath It is made up of radial stator yoke 331 and magnet radial poles 332 to stator 33, radial stator yoke 331 is annular, radial stator yoke 331 Interior annular 6 magnet radial poles 332 evenly distributed in the circumferential direction, the inner surface of magnet radial poles 332 and the outer surface of rotor 31 Between there is radial air gap.Radial direction control coil 34 is wound in each magnet radial poles 332, two radial direction magnetic in face are faced each other Two winding directions of radial direction control coil 34 on pole 332 are consistent, and are in series, and form a phase winding.6 radial direction control lines Circle 34 forms three-phase windings, using a size and Orientation for three-phase converter suspending power.It is outer fixed in radial stator 33 The permanent magnet 36 of annular is socketed, the fixed sleeves of permanent magnet 36 connect axial stator 32, make permanent magnet 36 diametrically very close to each other Be embedded between axial stator 32 and radial stator 33.Permanent magnet 36 radially magnetizes, and is N poles in radial outer end, interior End is S poles.Axial stator 32 is columnar structured, and the two ends of axial stator 32 have disk end cap 322, the two ends of axial stator 32 Disk end cap 322 corresponding direction of both ends from center to rotor 31 respectively extend an axial pole for annular 321, axle Axial air-gap is left between magnetic pole 321 and the end face of rotor 31.Permanent magnet 36 is just embedded in the cylindrical shape side of axial stator 32 Between wall and the cylindrical anchor ring of radial stator yoke 331.The axial length of permanent magnet 36 is less than the axial length of radial stator 33, footpath To the axial length of the axial length less than rotor 31 of stator 33.Therefore, in the inside of axial stator 32, the two of radial stator 33 There is certain space between end and the disk end cap of axial stator 32.In the cylindrical inner of axial stator 32, positioned at radially The front and rear both sides side of stator 33 is each to set an axial control coil 35, and two axial control coils 35 of front and rear both sides are mutually gone here and there Connection, is driven by an amplidyne.Two axial control coils 35 are in annular, before radial stator yoke 331 Afterwards by both sides, the cylindrical shape side inwall winding of stator 32 vertically, the winding direction of two axial control coils 35 is consistent.Axially It is columnar that radial stator 33, radial direction control coil 34, axial control coil 35 and permanent magnet 36 are all wrapped in its by stator 32 It is internal.
When electric current is passed through in radial direction control coil 34, one of them in two magnet radial poles 332 in face is faced each other The phase of biasing magnetic flux 91 that the radial direction control magnetic flux 93 that radial direction control coil 34 in magnet radial poles 332 is produced is produced with permanent magnet 36 Superposition, the radial direction control magnetic flux 93 that the radial direction control coil 34 in another magnet radial poles 332 is produced offsets with biasing magnetic flux 91 Disappear, so as to produce the suspending power along the direction of one of magnet radial poles 332.When being passed through electric current in two axial control coils 35 When, the axial direction control magnetic field 92 of side is superimposed with the bias magnetic field 91 that permanent magnet 36 is produced in axial stator 32, opposite side The bias magnetic field 91 that is produced with permanent magnet 36 of axial direction control magnetic field 92 offset so that in the gas of axial stator 32 and rotor 31 Unidirectional suspending power is produced in gap.
As shown in Figure 4 and Figure 5, sextupole radial hybrid magnetic bearing 4 includes stator and rotor 46, and rotor 46 is outer to be coaxially cased with determining Son, together with rotor 46 is fixedly and coaxially connected with rotating shaft 1.Stator is made up of stator yoke 43 and magnetic pole of the stator, and stator yoke 43 is round Annular, 6 magnetic pole of the stator have been evenly arranged in the inner ring surface of stator yoke 43 along peripheral direction, 6 magnetic pole of the stator and rotor 46 it Between leave radial air gap.The axial length of rotor 46 is identical with the axial length of stator.6 magnetic pole of the stator are by three active magnetic poles 41 and three permanent magnetism magnetic poles 42 constitute, active magnetic pole 41 and the interlaced arrangement of permanent magnetism magnetic pole 42.Each active magnetic pole 41 and phase 120 ° are spaced between two adjacent permanent magnetism magnetic poles 42, are spaced between each permanent magnetism magnetic pole 42 and two adjacent active magnetic poles 41 120°.A control coil 44 is wound with each active magnetic pole 41, three controls wound on three active magnetic poles 41 Coil 44 constitutes three-phase coil, is driven by a three-phase inverter.One block of permanent magnetism is inlayed in fixation in the middle of each permanent magnetism magnetic pole 42 Body 45, permanent magnet 45 is used to produce biasing magnetic flux.The radial magnetizing of permanent magnet 45, the inner diametrically of permanent magnet 45 is N poles, outer End is S poles.The axial length of permanent magnet 45 is identical with the axial length of magnetic pole of the stator.
To the electric current that different size and direction are passed through in the control coil 44 on three active magnetic poles 41, it is possible to produce edge Three power of different sizes in the direction of active magnetic pole 41, therefore by adjusting needed for the electric current in control coil 44 can just produce The suspending power wanted.

Claims (8)

1. a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supporting electro spindle, an including rotating shaft(1), it is characterized in that: Rotating shaft(1)Middle part be equipped with motor(2), motor(2)Front side be sextupole radial-axial hybrid magnetic bearing(3), rear side be sextupole Radial hybrid magnetic bearing(4), rotating shaft(1)With sextupole radial-axial hybrid magnetic bearing(3)Rotor and sextupole radially mixing magnetic axis Hold(4)Rotor concentric be fixedly connected.
2. a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle according to claim 1, it is characterized in that: Sextupole radial-axial hybrid magnetic bearing(3)Rotor(31)Coaxial sleeve is by radial stator yoke(331)And magnet radial poles(332) The radial stator of composition(33)Center, radial stator yoke(331)6 magnet radial poles evenly distributed in the circumferential direction(332), Each magnet radial poles(332)On wind radial direction control coil(34), aspectant two radial direction control coils(34)Winding side To consistent and series connection;Radial stator(33)Fixed sleeves connect the permanent magnet of annular(36), permanent magnet(36)Fixed sleeves spindle To stator(32);Axial stator(32)It is that two ends have disk end cap(322)Columnar structured, disk end cap(322)In To rotor at the heart(31)Corresponding direction of both ends extend axial pole(321);In radial stator(33)Front and rear both sides side it is each One axial control coil is set(35), two axial control coils(35)It is serially connected.
3. a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle according to claim 1, it is characterized in that: Sextupole radial hybrid magnetic bearing(4)Rotor(46)Stator is coaxially cased with outward, stator is by stator yoke(43), three active magnetic poles (41)With three permanent magnetism magnetic poles(42)Composition, active magnetic pole(41)And permanent magnetism magnetic pole(42)Interlaced arrangement, each active magnetic Pole(41)On be wound with a control coil(44), each permanent magnetism magnetic pole(42)In the middle of fixation inlay one piece of permanent magnet (45).
4. a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle according to claim 2, it is characterized in that: The permanent magnet(36)Radially magnetize, outer end radially is that N poles, the inner are S poles.
5. a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle according to claim 2, it is characterized in that: Permanent magnet(36)Axial length be less than radial stator(33)Axial length, radial stator(33)Axial length be less than rotor (31)Axial length.
6. a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle according to claim 3, it is characterized in that: The permanent magnet(45)Radial magnetizing, the inner radially is that N poles, outer end are S poles;Rotor(46), permanent magnet(45)And stator Axial length it is identical.
7. a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle according to claim 1, it is characterized in that: Casing(6)Rear and front end respectively connection one end cap(8), two end caps(8)Center is each to be coaxially equipped with an auxiliary bearing (7), rotating shaft(1)Coaxially pass through two auxiliary bearings(7).
8. a kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle according to claim 1, it is characterized in that: Rotating shaft(1)Front-end and back-end respectively equipped with for detecting rotating shaft(1)The displacement transducer of radial displacement(5), rotating shaft(1)Rear end Equipped with for coordinating detection rotating shaft(1)The rosette of axial displacement(9).
CN201710079793.4A 2017-02-15 2017-02-15 A kind of inverter driving ejector half five degree of freedom hybrid magnetic bearing supports electro spindle Pending CN106825627A (en)

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Cited By (7)

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CN109194021A (en) * 2018-09-17 2019-01-11 江苏大学 A kind of electro spindle of five-degree-of-freedom alternating sextupole active magnetic bearings bearing
CN109340258A (en) * 2018-11-21 2019-02-15 珠海格力电器股份有限公司 A kind of electrically driven, magnetically levitated bearing arrangement of novel permanent magnetic
CN109570599A (en) * 2018-11-30 2019-04-05 沈阳工业大学 Disc type electric machine magnetic suspension facing cutter
CN111061221A (en) * 2019-12-16 2020-04-24 常州工学院 Self-adaptive hybrid control method for magnetic suspension electric spindle
CN112160985A (en) * 2020-08-17 2021-01-01 江苏大学 Electric spindle system supported by double-piece radial six-pole hybrid magnetic bearing with different magnetic pole surfaces
CN113369507A (en) * 2021-06-28 2021-09-10 重庆工商大学 High-speed high-precision electric spindle integrating three-dimensional vibration active control function
CN116123216A (en) * 2023-04-17 2023-05-16 山东华东风机有限公司 Magnetic bearing system based on radial-axial coupling magnetic bearing, control method and system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109194021A (en) * 2018-09-17 2019-01-11 江苏大学 A kind of electro spindle of five-degree-of-freedom alternating sextupole active magnetic bearings bearing
CN109340258A (en) * 2018-11-21 2019-02-15 珠海格力电器股份有限公司 A kind of electrically driven, magnetically levitated bearing arrangement of novel permanent magnetic
CN109570599A (en) * 2018-11-30 2019-04-05 沈阳工业大学 Disc type electric machine magnetic suspension facing cutter
CN111061221A (en) * 2019-12-16 2020-04-24 常州工学院 Self-adaptive hybrid control method for magnetic suspension electric spindle
CN111061221B (en) * 2019-12-16 2021-06-04 常州工学院 Self-adaptive hybrid control method for magnetic suspension electric spindle
CN112160985A (en) * 2020-08-17 2021-01-01 江苏大学 Electric spindle system supported by double-piece radial six-pole hybrid magnetic bearing with different magnetic pole surfaces
CN113369507A (en) * 2021-06-28 2021-09-10 重庆工商大学 High-speed high-precision electric spindle integrating three-dimensional vibration active control function
CN116123216A (en) * 2023-04-17 2023-05-16 山东华东风机有限公司 Magnetic bearing system based on radial-axial coupling magnetic bearing, control method and system

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Application publication date: 20170613