CN101034825A - Electromotor adopting the magnetic floating bearing - Google Patents
Electromotor adopting the magnetic floating bearing Download PDFInfo
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- CN101034825A CN101034825A CN 200610024427 CN200610024427A CN101034825A CN 101034825 A CN101034825 A CN 101034825A CN 200610024427 CN200610024427 CN 200610024427 CN 200610024427 A CN200610024427 A CN 200610024427A CN 101034825 A CN101034825 A CN 101034825A
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- bearing
- magnetic bearing
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- rotor
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Abstract
The invention relates to a electric motor which used the magnetic bearing, it includes the electricity moving axis, the rotor, the stator, the bearing, among, the electricity engine shaft two terminal respectively are loaded with a magnetic bearing, the electric engine axis on the two outboard of magnetic bearing separately setup a rolling bearing, the high precise sensor installed on the magnetic bearing stator. An airway in the center bit of the electric engine axis is used for taking away the heat which the magnetic coil and rolling eddy current loss produce. The invention magnetic bearing electric motor, can causes the rotary speed of the high power motor reaches to more than 5000r/min, and the magnetic bearing has no attrition, no need to refuel turely achieve exempt maintenance of the electrical machinery.
Description
Technical field
The present invention relates to high-speed motor, particularly adopt the motor of magnetic bearing.
Background technology
What traditional motor adopted is to roll or sliding bearing, thereby because rolling or sliding bearing exist friction to limit rotating speed of motor.In addition, because rolling or sliding bearing need the easy contaminated system of lubricant.Motor speed is improved, and above-mentioned two kinds of bearings are difficult to reach.A kind of magnetic bearing of novelty only depends on electromagnetic force that rotor is floated, adjust the magnetic field force size by the closed-loop control that is distributed in the transducer at each position on the bearing stator, to keep the air gap between the rotor even, only there is very little windage in magnetic bearing, frictional heat is very little, make motor can reach very high rotating speed, motor speed depends on the structural strength of rotor itself fully, but motor adopts magnetic bearing to have two problems: (one) is because bearing itself has solenoid and rotor eddy current loss to produce heat.(2) how to protect magnetic bearing during loss of excitation.
Summary of the invention
The object of the present invention is to provide a kind of motor of magnetic bearing of high-power and high-speed, the high power motor rotating speed is reached more than the 5000r/min,, need not to refuel, can really realize the non-maintaining of motor because magnetic bearing does not have wearing and tearing.
The technical problem of the required solution of motor of employing magnetic bearing of the present invention is:
1, at first solves the heat problem that solenoid and rotor eddy current loss produce, because magnetic bearing is not subjected to diameter restrictions, thereby can adopt the bigger diameter of axle, and beat ventilation hole at the center of axle, utilize the wind circulation of the fan of motor own, make the axle center increase a wind path, take away the heat that magnetic bearing, rotor distribute, solve the heat problem that magnetic rotor-bearing eddy current loss produces, improved the critical whirling speed of rotor simultaneously.And adopt high-precision transducer can reach very high running accuracy, make motor when high speed rotating noise, vibrations very little.
How to protect magnetic bearing when 2, solving loss of excitation; the rolling bearing that on the motor shaft in two outsides of magnetic bearing, respectively increased device; bearing outer ring and bearing chamber are designed to certain interval; make the size in gap guarantee when rotor floats, not collide, the problem of protection magnetic bearing when adopting this method of protection bearing to solve loss of excitation with bearing chamber.
The motor of employing magnetic bearing of the present invention comprises motor shaft, rotor, stator, bearing, and wherein, a magnetic bearing respectively is equipped with at the motor shaft two ends; A rolling bearing respectively is housed on the motor shaft in two outsides of magnetic bearing, a high-precision transducer is housed on magnetic bearing.Be drilled with a ventilation hole at the motor shaft center, utilize the wind of the fan of motor itself to form the heat that a gas flow loop is taken away magnetic coil and the generation of rotor eddy current loss by ventilation hole.On the motor shaft in two outsides of magnetic bearing, a rolling bearing is housed respectively, and makes the bearing outer ring of rolling bearing and bearing chamber that certain interval be arranged, do not collide when the gap can make motor shaft float with bearing chamber.
Superior effect of the present invention is:
Adopt motor shaft centre-drilling hole to make the wind of fan form the heat that a gas flow loop is taken away magnetic coil and the generation of rotor eddy current loss by ventilation hole, the rotating speed of high power motor is brought up to more than the 5000r/min, because magnetic bearing does not have wearing and tearing, need not to refuel and can really realize the non-maintaining of motor.How the protection rolling bearing that increased device on the motor shaft in two outsides of magnetic bearing protects the magnetic bearing problem when having solved loss of excitation.
Description of drawings
Fig. 1 is a magnetic bearing structural representation of the present invention.
Fig. 2 is the electric motor structure schematic diagram of magnetic bearing of the present invention.
Label declaration in the accompanying drawing:
1-rolling bearing; 2-magnetic bearing;
21-magnetic rotor-bearing; 22-magnetic bearing stator;
3-rotor; 4-stator;
5-transducer; 6-ventilation hole;
7-motor shaft; 8-transducer;
9-air gap.
Embodiment
Is that 165kw variable-frequency motor volume rotating speed is 5200r/min below in conjunction with accompanying drawing to motor of the present invention, and example further specifies:
See also shown in Fig. 1,2, Fig. 1 is a magnetic bearing structural representation of the present invention, is made up of magnetic rotor-bearing 21, magnetic bearing stator 22, transducer 8, and wherein magnetic bearing stator 22 is equipped with a transducer 8, to adjust the size of magnetic field force.When energising, produce a magnetic field force, when making rotor, electromagnetic force floats, the magnetic field force size is adjusted in the closed-loop control of the transducer 8 by being distributed in each position on the magnetic bearing stator 22, to keep the air gap 9 between the stator and rotor even, therefore only there is very little windage in magnetic bearing, can improve motor speed greatly.
Fig. 2 is a magnetic bearing electric motor structural representation of the present invention.At motor shaft 7 two ends one magnetic bearing 2 is housed respectively, on the electric drive axle 7 in two outsides of magnetic bearing 2, a rolling bearing 1 is housed respectively; Magnetic bearing 2 is equipped with high- precision sensor 5,8, can reach very high running accuracy, makes noise, the vibrations of motor when high rotating speed very little.
Claims (3)
1, a kind of motor that adopts magnetic bearing comprises motor shaft (7) rotor (3) stator (4), bearing (1), it is characterized in that:
At motor shaft (7) two ends one magnetic bearing (2) is housed respectively; On the motor shaft in two outsides of magnetic bearing (2), a rolling bearing (1) is housed respectively.
2, the motor of employing magnetic bearing according to claim 1 is characterized in that:
The center of motor shaft (7) is drilled with a ventilation hole (6), and the wind of electric motor fan forms the heat that a gas flow loop is taken away magnetic coil and the generation of rotor eddy current loss by ventilation hole (6).
3, the motor of employing magnetic bearing according to claim 1 is characterized in that:
The bearing outer ring and the bearing chamber of rolling bearing (1) have certain interval, and the gap can guarantee not collide with bearing chamber when motor shaft floats.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610024427 CN101034825A (en) | 2006-03-07 | 2006-03-07 | Electromotor adopting the magnetic floating bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610024427 CN101034825A (en) | 2006-03-07 | 2006-03-07 | Electromotor adopting the magnetic floating bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101034825A true CN101034825A (en) | 2007-09-12 |
Family
ID=38731205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610024427 Pending CN101034825A (en) | 2006-03-07 | 2006-03-07 | Electromotor adopting the magnetic floating bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101034825A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148546A (en) * | 2011-01-26 | 2011-08-10 | 龙梅 | Special motor for lifting table of special digital printer for printing plastic product |
| CN107191488A (en) * | 2017-07-03 | 2017-09-22 | 燕山大学 | A kind of magnetic liquid dual suspension passive bearing journal bearing |
-
2006
- 2006-03-07 CN CN 200610024427 patent/CN101034825A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148546A (en) * | 2011-01-26 | 2011-08-10 | 龙梅 | Special motor for lifting table of special digital printer for printing plastic product |
| CN107191488A (en) * | 2017-07-03 | 2017-09-22 | 燕山大学 | A kind of magnetic liquid dual suspension passive bearing journal bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20070912 |