CN102437798A - High speed electric spindle supported by all-permanent magnet bearing - Google Patents

High speed electric spindle supported by all-permanent magnet bearing Download PDF

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Publication number
CN102437798A
CN102437798A CN2011103180981A CN201110318098A CN102437798A CN 102437798 A CN102437798 A CN 102437798A CN 2011103180981 A CN2011103180981 A CN 2011103180981A CN 201110318098 A CN201110318098 A CN 201110318098A CN 102437798 A CN102437798 A CN 102437798A
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CN
China
Prior art keywords
bearing
ring
magnet
permanent
radial
Prior art date
Application number
CN2011103180981A
Other languages
Chinese (zh)
Inventor
李松生
陈剑
陈斌
周鹏
黄晓
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上海大学
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.)
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Publication date
Application filed by 上海大学 filed Critical 上海大学
Priority to CN2011103180981A priority Critical patent/CN102437798A/en
Publication of CN102437798A publication Critical patent/CN102437798A/en

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Abstract

The invention discloses a high speed electric spindle supported by an all-permanent magnet bearing. The high speed electric spindle comprises a motor stator, a motor rotor, a rotating shaft, a housing, a front cover, a front bearing pedestal, a rear bearing pedestal, a rear cover and a bearing system. The bearing system is characterized in that: two radial permanent magnet bearings are used as radial support bearings; one axial bidirectional permanent magnet thrust bearing is used an axial support bearing; the two radial permanent magnet bearings respectively include two moving magnet rings and two static magnet rings as well as are installed at two sides of the motor rotator; and the bidirectional permanent magnet thrust bearing is formed by two static magnet rings and one moving magnet ring as well as is installed at one end of the rotating shaft. According to the high speed electric spindle supported by an all-permanent magnet bearing in the invention, an all-permanent magnet bearing that is free of friction and wearing as well as does not need auxiliary support and external control is utilized as a support part of an electric spindle, so that an axial load and a radial load are beared; and therefore, functions of complete support and stable suspension for a rotating bearing of the electric spindle are realized.

Description

The high-speed electric main shaft of full Permanent-magnet bearing supporting

Technical field

The present invention relates to the high-speed electric main shaft of full Permanent-magnet bearing supporting in a kind of electromechanical engineering field.

Background technology

At present to enjoy domestic and international concern, the benefit that it brings is obvious to all to magnetic levitation technology as the huge technology of a kind of development potentiality and prospect.The electricity main shaft is as the Core Feature parts of Modern High-Speed processing, is with adorning in the drive motors, with the function of the electromechanical integration that realizes functions such as motor and main shaft.The electric main shaft of magnetic suspension bearing supporting at present mainly contains the electric main shaft of electromagnetic bearing supporting; Though electromagnetic bearing has no fretting wear and controlled characteristics; But owing to need external control system; Therefore characteristics such as big, the cost height of system complex, volume still mainly are in the laboratory research stage so far, can't in industry, apply on a large scale.

Therefore the electric main shaft that needs a kind of novel magnetically levitated bearing supporting of exploitation; Under the condition that realizes electric spindle rotor system's supporting and stable suspersion; Make it cost low, conveniently make and satisfy the use needs of actual engineering; Give full play to the advantage of magnetic suspension bearing, with realize electric main shaft at a high speed, the target of efficient and high reliability, long-life operation.

Summary of the invention

The objective of the invention is limitation and shortcoming for the electric main shaft application that overcomes the supporting of plain bearing such as present rolling bearing, sliding bearing or electromagnetic bearing; A kind of high-speed electric main shaft of full Permanent-magnet bearing supporting is provided, embodies the advantage of no fretting wear, long-life, high efficiency, low cost and high reliability.

In order to achieve the above object, design of the present invention is following:

A kind of high-speed electric main shaft of full Permanent-magnet bearing supporting, it comprises radial and axial Permanent-magnet bearing, the directly fixedly rotating shaft of inner electric machine rotor and Permanent-magnet bearing rotating ring, the inner electric machine stator is installed and have the shell of cooling chamber, front-end bearing pedestal that the installation Permanent-magnet bearing encircles surely and rear bearing block etc.The rotating shaft that it is characterized in that described high-speed electric main shaft is supported and stable suspersion by the supporting system that Permanent-magnet bearing is formed fully; Bearing outer radial and axial load simultaneously; With 5 degrees of freedom of constraint except that rotating around axis: forward and backward two overlap the radial permanent magnet bearings as radial support bearing to bear radial load; And with two-way axial permanent magnetic thrust bearing as the axially mounting bearing to bear axial load; Whole supporting system does not have other aiding support bearing, does not need the outside spare system that supporting system is controlled yet.

Above-mentioned as the installation setting of radial support bearing be: install respectively in the front and back ends portion of rotating shaft two cover repulsion type radial permanent magnet bearings are set, realize the radial suspension of rotating shaft with the radial permanent magnet bearing.

Above-mentioned with the bidirectional permanent magnetic thrust bearing as the installation setting of rotating shaft axially mounting bearing be: the ring of deciding of bidirectional permanent magnetic thrust bearing that the repulsion type is set is installed in the both sides of the rotating ring of the Permanent-magnet bearing that is fixedly connected in rotating shaft---thrust collar, thereby realizes the axial suspension of rotating shaft.

In above-mentioned electric main shaft, be provided with the liquid cools function, its cooling passage is arranged in the electric main shaft shell, realizes the cooling to electric main shaft inner electric machine, with the power output that improves inner electric machine most possibly with in electric main shaft running, prevent superheating phenomenon.

According to the foregoing invention design, the present invention adopts following technical proposals:

A kind of high-speed electric main shaft of full Permanent-magnet bearing supporting; Comprise motor stator, rotor, rotating shaft, shell, protecgulum, front-end bearing pedestal, rear bearing block, bonnet and supporting system; Said supporting system comprises two radial permanent magnet bearings as radial support bearing, and an axial bidirectional permanent magnetic thrust bearing is as the axially mounting bearing; Described two radial permanent magnet bearings are respectively by two moving magnet rings and two magnetostatic rings) to form and be installed in the both sides of rotor, said bidirectional permanent magnetic thrust bearing is installed in an end of rotating shaft by two magnetostatic rings and moving magnet ring.

In said two radial permanent magnet bearings; The pole orientation of moving magnet ring and magnetostatic ring is identical respectively; Make and produce radially repulsion at moving magnet ring and magnetostatic interannular; Be that magnetostatic ring produces supporting force radially to moving magnet ring, make and to bear corresponding radial load, thereby realize the radial support and the stable suspersion of countershaft with the rotating shaft that moving magnet ring connects firmly mutually.

In the said axial bidirectional permanent magnetic thrust bearing; In two adjacent dynamic and static ring axial magnetic sides; The direction of magnetic pole is identical respectively, makes to produce two-way axial repulsion at moving magnet ring and magnetostatic interannular, and promptly magnetostatic ring produces relative axial thrust to moving magnet ring; Make the rotating shaft that connects firmly mutually with moving magnet ring bearing two-way axial load, thus the axially mounting and the stable suspersion of realization countershaft.

In the cavity in the said shell, place motor stator and cooling water cavity; Front-end bearing pedestal, rear bearing block are installed the magnetostatic ring of radial permanent magnet bearing respectively; Installation shaft is to the magnetostatic ring of Permanent-magnet bearing in rear bearing block and the bonnet; The moving magnet ring of the moving magnet ring of fixed electrical machinery rotor, radial permanent magnet bearing and axial permanent magnetic bearing in the rotating shaft constitutes the high-speed electric main shaft that full Permanent-magnet bearing supports jointly.

The present invention has following outstanding substantial characteristics and marked improvement compared with prior art:

(1) utilizes the characteristic that the permanent magnetic material opposite sex is repelled each other and distance is nearer, repulsion is big more; Adopt the repulsion type Permanent-magnet bearing structure of specific arrangement and configuration; Realize that countershaft supports and the process that suspends in, be that rotor-support-foundation system obtains good stable property in the greater room scope;

(2) rotor only receives the influence of air drag in operation process, and the electric speed of mainshaft is high, and heating is few, and the life-span is long.

(3) need not lubricate and seal, saved traditional lubricated and sealing device, simplified Machine Design, make its compact conformation, reliability is high.

(4) environmental suitability is strong, can in vacuum and corrosive medium, work.And air bearing can't be used in a vacuum, and sliding bearing and rolling bearing can produce unavoidable pollution owing to the volatilization of oil molecule in a vacuum.

(5) Permanent-magnet bearing is insensitive to ambient temperature, can adapt to the environment for use of low temperature and high temperature.

(6) can bear bigger axial and radial load simultaneously, satisfy actual engineering and use needs.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the high-speed electric main shaft of full Permanent-magnet bearing supporting among the present invention.

Fig. 2 is shaft support system principle, and the supporting system layout of the high-speed electric main shaft of full Permanent-magnet bearing supporting among the present invention.

Embodiment

Embodiment one:

The preferred embodiments of the present invention accompanying drawings is following:

Present embodiment is: referring to Fig. 1; The high-speed electric main shaft of this full Permanent-magnet bearing supporting comprises motor stator (9), rotor (7), rotating shaft (1), shell (6), protecgulum (2), front-end bearing pedestal (5), rear bearing block (12), bonnet (16) and supporting system etc.Said supporting system comprises: two pairs radially Permanent-magnet bearing (moving magnet ring 3 and 10, magnetostatic ring 4 and 11) as radial support bearing, bidirectional permanent magnetic thrust bearing (magnetostatic ring 13,15 and moving magnet ring 14) is as the axially mounting bearing.Described two pairs radially Permanent-magnet bearing (moving magnet ring 3 and 10, magnetostatic ring 4 and 11) be installed in the both sides of rotor 8, said bidirectional permanent magnetic thrust bearing (magnetostatic ring 13,15 and moving magnet ring 14) is installed in an end of rotating shaft (1).

Embodiment two:

Present embodiment and embodiment one are basic identical, and special feature is as follows:

Referring to Fig. 1, the cavity in the above-mentioned shell (6) is settled described electric main shaft inner electric machine stator (9) and rotor (7), and motor stator (9) is fixedly connected with shell (6) inwall.Be furnished with cooling-water duct (8) on the above-mentioned shell (6) and connect cooling system, internally cool off in the outside of the motor stator (9) of dress.

Supporting system principle of its rotating shaft (1) and supporting system layout are referring to Fig. 2; Moving magnet ring (3) is identical with magnetostatic ring (4) pole orientation in the left end radial permanent magnet bearing (19); Moving magnet ring (10) is identical with magnetostatic ring (11) pole orientation in the right-hand member radial permanent magnet bearing (18); They all are repulsion type radial permanent magnet bearings, utilize the repulsive force supporting shaft that produces between the dynamic and static magnet ring permanent magnet.When effect in the rotating shaft 1 has radial load; The working gas gap of moving magnet ring and magnetostatic interannular will change; The repulsion that air gap reduces direction is bigger than the repulsion of air gap augment direction; Thereby the rotating shaft radial position is changed, and the direction that increases to air gap moves, and finally is tending towards poised state radially; Bidirectional permanent magnetic thrust bearing (17) is as the axially mounting bearing, its thrust collar promptly the magnetic of moving magnet ring (14) the magnetostatic ring (13,15) with its both sides is identical respectively, thereby produce axial repulsion respectively.When effect in the rotating shaft 1 has axial load; Working gas gap between promptly moving magnet ring (14) of thrust collar and magnetostatic ring (13,15) will change; The repulsion that air gap reduces a side is bigger than the repulsion that air gap increases a side; Thereby rotating shaft (1) axial location is changed, and to the side shifting that air gap increases, state at last tends to balance.It is thus clear that, not having other aiding support, do not having under the condition of external auxiliary control system yet, electric main shaft rotating shaft relies on the supporting system of full Permanent-magnet bearing, can realize the supporting and the stable suspersion function of 5DOF.

Claims (4)

1. the high-speed electric main shaft of a full Permanent-magnet bearing supporting; Comprise motor stator (9), rotor (7), rotating shaft (1), shell (6), protecgulum (2), front-end bearing pedestal (5), rear bearing block (12), bonnet (16) and supporting system; It is characterized in that said supporting system comprises two radial permanent magnet bearings (19,18) as radial support bearing, an axial bidirectional permanent magnetic thrust bearing (17) is as the axially mounting bearing; Described two radial permanent magnet bearings (19,18) are made up of two moving magnet rings (3,10) and two magnetostatic rings (4,11) respectively and are installed in the both sides of rotor (7), and said bidirectional permanent magnetic thrust bearing (17) is installed in an end of rotating shaft (1) by two magnetostatic rings (13,15) and a moving magnet ring (14).
2. the high-speed electric main shaft that supports according to right 1 described full Permanent-magnet bearing; It is characterized in that in said two radial permanent magnet bearings (19,18); The pole orientation of moving magnet ring (3,10) and magnetostatic ring (4,11) is identical respectively; Make and between moving magnet ring (3,10) and magnetostatic ring (4,11), produce radially repulsion; Be that magnetostatic ring (4,11) produces supporting force radially to moving magnet ring (3,10), make and to bear corresponding radial load, thereby realize the radial support and the stable suspersion of countershaft (1) with the rotating shaft (1) that moving magnet ring (3,10) connects firmly mutually.
3. the high-speed electric main shaft that supports according to right 1 described full Permanent-magnet bearing; It is characterized in that in the said axial bidirectional permanent magnetic thrust bearing (17); In two adjacent dynamic and static ring axial magnetic sides; The direction of magnetic pole is identical respectively, makes between moving magnet ring (14) and magnetostatic ring (13,15), to produce two-way axial repulsion, and promptly magnetostatic ring (13,15) produces relative axial thrust to moving magnet ring (14); Make the rotating shaft (1) that connects firmly mutually with moving magnet ring (14) bearing two-way axial load, thus the axially mounting and the stable suspersion of realization countershaft (1).
4. according to the high-speed electric main shaft of right 1 described full Permanent-magnet bearing supporting, it is characterized in that the cavity in the said shell (6) is settled described motor stator (9) and cooling water cavity; Front-end bearing pedestal (5), rear bearing block (12) are installed the magnetostatic ring (4,11) of radial permanent magnet bearing (19,18) respectively; Rear bearing block (12) and the interior installation shaft of bonnet (16) are to the magnetostatic ring (13,15) of Permanent-magnet bearing (17); Fixed electrical machinery rotor (7), the moving magnet ring (4,11) of radial permanent magnet bearing (19,18) and the moving magnet ring (14) of axial permanent magnetic bearing (17) are gone up in rotating shaft (1), constitute the high-speed electric main shaft of full Permanent-magnet bearing supporting jointly.
CN2011103180981A 2011-10-19 2011-10-19 High speed electric spindle supported by all-permanent magnet bearing CN102437798A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103180981A CN102437798A (en) 2011-10-19 2011-10-19 High speed electric spindle supported by all-permanent magnet bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103180981A CN102437798A (en) 2011-10-19 2011-10-19 High speed electric spindle supported by all-permanent magnet bearing

Publications (1)

Publication Number Publication Date
CN102437798A true CN102437798A (en) 2012-05-02

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103441613A (en) * 2013-09-02 2013-12-11 南京磁谷科技有限公司 Magnetic suspension permanent-magnet synchronous high-speed motor
CN103821727A (en) * 2014-02-28 2014-05-28 浙江创美机电有限公司 High-speed axial flow pump
CN106112022A (en) * 2016-08-30 2016-11-16 上海大学 A kind of high-speed electric main shaft with composite bearing
CN106438696A (en) * 2016-11-21 2017-02-22 南京磁谷科技有限公司 Magnetic bearing structure
WO2019037525A1 (en) * 2017-08-24 2019-02-28 莱克电气股份有限公司 Vacuum cleaner motor and vacuum cleaner
CN110120720A (en) * 2018-02-06 2019-08-13 翁寿成 Energy-saving and power generation device
CN110315409A (en) * 2019-08-09 2019-10-11 安徽理工大学 A kind of adaptive laminating apparatus of suspension permanent magnetic milling robot main shaft

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6617732B1 (en) * 1999-12-10 2003-09-09 Delta Electronics, Inc. Magnetic bearing structure
CN1651779A (en) * 2004-02-03 2005-08-10 柯寅昌 Magnetic suspension bearing
CN1963244A (en) * 2006-11-21 2007-05-16 浙江大学 Rotor weight self-adaptive type permanent magnet thrust bearing
US20100126374A1 (en) * 2008-11-23 2010-05-27 Qigen Ji Magnetostatic levitation and propulsion systems for moving objects
CN101807869A (en) * 2009-02-12 2010-08-18 卓向东 Magnetic suspension bearing motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6617732B1 (en) * 1999-12-10 2003-09-09 Delta Electronics, Inc. Magnetic bearing structure
CN1651779A (en) * 2004-02-03 2005-08-10 柯寅昌 Magnetic suspension bearing
CN1963244A (en) * 2006-11-21 2007-05-16 浙江大学 Rotor weight self-adaptive type permanent magnet thrust bearing
US20100126374A1 (en) * 2008-11-23 2010-05-27 Qigen Ji Magnetostatic levitation and propulsion systems for moving objects
CN101807869A (en) * 2009-02-12 2010-08-18 卓向东 Magnetic suspension bearing motor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103441613A (en) * 2013-09-02 2013-12-11 南京磁谷科技有限公司 Magnetic suspension permanent-magnet synchronous high-speed motor
CN103821727A (en) * 2014-02-28 2014-05-28 浙江创美机电有限公司 High-speed axial flow pump
CN106112022A (en) * 2016-08-30 2016-11-16 上海大学 A kind of high-speed electric main shaft with composite bearing
CN106112022B (en) * 2016-08-30 2019-11-19 上海大学 A kind of high-speed electric main shaft with composite bearing
CN106438696A (en) * 2016-11-21 2017-02-22 南京磁谷科技有限公司 Magnetic bearing structure
WO2019037525A1 (en) * 2017-08-24 2019-02-28 莱克电气股份有限公司 Vacuum cleaner motor and vacuum cleaner
CN110120720A (en) * 2018-02-06 2019-08-13 翁寿成 Energy-saving and power generation device
CN110315409A (en) * 2019-08-09 2019-10-11 安徽理工大学 A kind of adaptive laminating apparatus of suspension permanent magnetic milling robot main shaft

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Application publication date: 20120502