CN203491844U - Magnetic suspension bearing system - Google Patents
Magnetic suspension bearing system Download PDFInfo
- Publication number
- CN203491844U CN203491844U CN201320561470.6U CN201320561470U CN203491844U CN 203491844 U CN203491844 U CN 203491844U CN 201320561470 U CN201320561470 U CN 201320561470U CN 203491844 U CN203491844 U CN 203491844U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- isolation plate
- bearing system
- winding
- bearing
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The utility model relates to a magnetic suspension bearing system, which comprises a main shaft, a motor stator, a bearing stator, an enclosure and a shielding device; the motor stator and the bearing stator are respectively arranged in the enclosure and installed on the main shaft; a motor winding is arranged on the motor stator; a bearing winding is arranged on the bearing stator; and the shielding device is arranged between the motor winding and the bearing winding and used for shielding magnet. The magnetic suspension bearing system disclosed by the utility model is capable of effectively avoiding too-long length of the motor main shaft and reducing electromagnetic interference.
Description
Technical field
The utility model relates to a kind of magnetic levitation bearing system, particularly relates to a kind of magnetic levitation bearing system with heavy-duty motor.
Background technology
Refer to shown in Fig. 1, its structural representation that is existing magnetic levitation bearing system, magnetic levitation bearing system 100 comprises main shaft 110, motor stator 120, bearing stator 130, casing 140 and transducer 150.
In the motor winding 122 of powerful motor, electric current is very large, for the winding of avoiding the high-frequency electromagnetic harmonic wave of motor winding 122 ends to flow small electric, such as bearing winding 132 is produced to larger interference, even make bearing winding 132 occur serious problem, magnetic levitation bearing system more than 100 adopts the mode that increases distance L between motor winding 122 and bearing winding 132, reduce the large electric current of motor and high-frequency electromagnetic harmonic wave to bearing winding 132, reduce the impact on transducer 150 collection signals simultaneously.
Increase so to a certain extent the length of main shaft 110, the natural frequency of main shaft 110 is reduced, caused the critical whirling speed of magnetic levitation bearing system 100 to reduce.
In view of above-mentioned defect, the inventor has obtained the invention finally through long research and practice.
Utility model content
Based on this, be necessary to provide a kind of length that can effectively avoid electric machine main shaft long and can reduce the magnetic levitation bearing system of electromagnetic interference.
A kind of magnetic levitation bearing system of the present utility model, comprises main shaft, motor stator, bearing stator, casing and screening arrangement;
Described motor stator and described bearing stator are placed in respectively in described casing, and are arranged on described main shaft;
On described motor stator, be provided with motor winding, on described bearing stator, be provided with bearing winding;
Described screening arrangement is placed between described motor winding and described bearing winding, plays separated magnetic effect.
Preferably, described screening arrangement comprises magnetic isolation plate; Described magnetic isolation plate is fixedly attached on described casing;
Described magnetic isolation plate is used high magnetic conductivity soft magnetic material to make.
Preferably, the quantity of magnetic isolation plate described in described screening arrangement is at least one.
Preferably, described magnetic isolation plate separates described motor winding in space independently.
Preferably, the quantity of described screening arrangement is at least one.
Preferably, the thickness range of described magnetic isolation plate is 0.5～3mm.
Preferably, described magnetic isolation plate is flat board, arc or waveform plate.
Preferably, the cross sectional shape of described magnetic isolation plate is irregularly shaped.
Preferably, the relative permeability of described magnetic isolation plate is 1000.
Preferably, described magnetic levitation bearing system also comprises transducer, and described transducer is placed between described screening arrangement and described bearing winding.
The beneficial effects of the utility model are compared with the prior art: effectively reduce the electromagnetic interference that the high-current leading of motor winding in heavy-duty motor rises; The shielding efficiency of high magnetic conductivity soft magnetic material is high; Magnetic isolation plate mounting structure is simple, and maintenance, replacing are conveniently; Main shaft axially takes up room little, little on the impact of the natural frequency of main shaft and critical frequency; Magnetic isolation plate thickness and cross sectional shape can flexible design; The mode of multiple layer combination can flexible shield effectiveness, and adaptability is very strong.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing magnetic levitation bearing system;
Fig. 2 is the structural representation of the first embodiment of magnetic levitation bearing system of the present utility model;
Fig. 3 is the structural representation of the second embodiment of magnetic levitation bearing system of the present utility model.
Embodiment
In order to solve the long problem of length of electric machine main shaft, proposed a kind of magnetic levitation bearing system that does not increase main axis length and can reduce electromagnetic interference and realized.
Below in conjunction with accompanying drawing, to the utility model is above-mentioned, be described in more detail with other technical characterictic and advantage.
Refer to shown in Fig. 2, the structural representation of its first embodiment that is magnetic levitation bearing system of the present utility model, magnetic levitation bearing system 100 comprises main shaft 110, motor stator 120, bearing stator 130, casing 140 and transducer 150.
In magnetic suspension system at a high speed, heavy-duty motor is because the electric current of motor winding 122 is large, and the humorous wave interference of high-frequency electromagnetic in motor winding 122 end spaces can disturb to bearing winding 132, even makes the control of bearing winding 132 occur serious problems.
In the present embodiment, magnetic levitation bearing system 100 also comprises screening arrangement, and screening arrangement is placed between motor stator 120 and bearing stator 130.Screening arrangement will not wish to cover between disturbed area, will not wish to separate completely with motor winding 122 between disturbed area.Transducer 150 is positioned at the same side with bearing stator 130, is also subject to the shielding action of screening arrangement.
Screening arrangement comprises magnetic isolation plate 160, and the electromagnetic field of high frequency of 160 pairs of motor windings 122 of magnetic isolation plate shields, the interference with the electromagnetic field of high frequency that reduces motor winding 122 to bearing winding 132; The shielding of motor winding 122 magnetic interference is belonged to low frequency alternating magnetic field shielding.
More preferably, according to the size of space magnetic field intensity, the magnetic isolation plate 160 that can choose different-thickness shields.It is 0.5～3mm left and right that magnetic isolation plate 160 generally can adopt thickness.
In the present embodiment, the preferential thickness that adopts 2mm of magnetic isolation plate 160, the relative permeability of high magnetic conductivity soft magnetic material is 1000, more than the shielding efficiency of magnetic isolation plate 160 can arrive 80dB, can effectively reduce the electromagnetic interference that the high-current leading of motor winding 122 in heavy-duty motor rises.
Screening arrangement adopts the connectors such as bolt that magnetic isolation plate 160 is fixed on casing 140, and magnetic isolation plate 160 is placed between motor stator 120 and bearing stator 130, and the tabular mounting structure of magnetic isolation plate 160 is simple in structure, and maintenance, replacing are conveniently.In the present embodiment, magnetic isolation plate 160 is dull and stereotyped.
With regard to not needing for avoiding electromagnetic interference to increase motor winding 122, be L with the minimum distance of bearing winding 132 like this, then cause the increase of main shaft 110 length, the axial space that the main shaft 110 of magnetic levitation bearing system 100 takies is little, can effectively shorten the distance between the distal-most end of motor stator 120 and the distal-most end of bearing stator 130, in the present embodiment, can reduce distance 16mm left and right between the two.
The utility model has obviously reduced the axial length of main shaft 110 with respect to prior art, the natural frequency of main shaft 110 is improved, and causes the critical whirling speed of magnetic levitation bearing system 100 to improve.
More preferably, also can improve shielding efficiency by increasing the number of plies of magnetic isolation plate 160, according to the actual requirements flexible screening effectiveness.
Refer to shown in Fig. 3, the structural representation of its second embodiment that is magnetic levitation bearing system of the present utility model, in the present embodiment, magnetic isolation plate 160 is done camber.Screening arrangement will not wish to cover between disturbed area, will not wish to separate completely with motor winding 122 between disturbed area.
Now, in the situation that guaranteeing to have shielded electromagnetic interference, motor winding 122 and bearing winding 132 position can be overlapping, can shorten the length of main shaft 110, magnetic levitation bearing system 100 is arranged compacter, the natural frequency of main shaft 110 improves, and causes the critical whirling speed of magnetic levitation bearing system 100 to improve.
Layout according to motor stator in reality 120 with bearing stator 130, consider the size of mounting structure, can be designed to the magnetic isolation plate 160 of other irregular section shapes, the adaptability of the magnetic isolation plate 160 of different cross section shape is very strong, can be widely used in the magnetic levitation bearing system 100 of various sizes.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (10)
1. a magnetic levitation bearing system, comprises main shaft, motor stator, bearing stator and casing, it is characterized in that, also comprises screening arrangement;
Described motor stator and described bearing stator are placed in respectively in described casing, and are arranged on described main shaft;
On described motor stator, be provided with motor winding, on described bearing stator, be provided with bearing winding;
Described screening arrangement is placed between described motor winding and described bearing winding, plays separated magnetic effect.
2. magnetic levitation bearing system according to claim 1, is characterized in that, described screening arrangement comprises magnetic isolation plate; Described magnetic isolation plate is fixedly attached on described casing;
Described magnetic isolation plate is used high magnetic conductivity soft magnetic material to make.
3. magnetic levitation bearing system according to claim 2, is characterized in that, the quantity of magnetic isolation plate described in described screening arrangement is at least one.
4. magnetic levitation bearing system according to claim 3, is characterized in that, described magnetic isolation plate separates described motor winding in space independently.
5. magnetic levitation bearing system according to claim 1, is characterized in that, the quantity of described screening arrangement is at least one.
6. magnetic levitation bearing system according to claim 2, is characterized in that, the thickness range of described magnetic isolation plate is 0.5～3mm.
7. magnetic levitation bearing system according to claim 6, is characterized in that, described magnetic isolation plate is flat board, arc or waveform plate.
8. magnetic levitation bearing system according to claim 6, is characterized in that, the cross sectional shape of described magnetic isolation plate is irregularly shaped.
9. magnetic levitation bearing system according to claim 2, is characterized in that, the relative permeability of described magnetic isolation plate is 1000.
10. magnetic levitation bearing system according to claim 1, is characterized in that, also comprises transducer, and described transducer is placed between described screening arrangement and described bearing winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320561470.6U CN203491844U (en) | 2013-09-10 | 2013-09-10 | Magnetic suspension bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320561470.6U CN203491844U (en) | 2013-09-10 | 2013-09-10 | Magnetic suspension bearing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203491844U true CN203491844U (en) | 2014-03-19 |
Family
ID=50262644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320561470.6U Expired - Lifetime CN203491844U (en) | 2013-09-10 | 2013-09-10 | Magnetic suspension bearing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203491844U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426291A (en) * | 2013-09-10 | 2015-03-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic bearing system |
-
2013
- 2013-09-10 CN CN201320561470.6U patent/CN203491844U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426291A (en) * | 2013-09-10 | 2015-03-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Magnetic bearing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207325797U (en) | A kind of electromagnet suitable for sheet metal component | |
| WO2008153036A1 (en) | Open magnetic resonance imaging device | |
| CN102916544B (en) | Motor rotor structure, permanent-magnet synchronous motor and variable-frequency compressor | |
| CN203491844U (en) | Magnetic suspension bearing system | |
| CN101888164A (en) | Low-speed high-thrust single-air gap magnetic gear composite linear electric motor | |
| CN104426291A (en) | Magnetic bearing system | |
| CN103545963A (en) | Stator end electric shielding structure of synchronous generator | |
| CN102044867A (en) | Device for reducing lightning invasion wave gradient of transformer | |
| CN205377497U (en) | Sinusoidal back electromotive force magnetic shoe structure of high polar arc coefficient | |
| CN201975776U (en) | Device capable of reducing steepness of lightning intruding wave onto transformer | |
| CN203118703U (en) | Common mode choke for improving common-mode radiation interference | |
| CN202586869U (en) | Motor IGBT module and driving circuit board assembly structure | |
| CN202422970U (en) | Novel high-frequency transformer | |
| CN203118728U (en) | Magnetic integrated shell-type traction transformer | |
| CN203554135U (en) | Three-phase hybrid stepping motor | |
| CN203733555U (en) | Transformer for high-frequency power source | |
| CN106059143A (en) | Rotor structure of multi-coil brushless motor | |
| CN205319915U (en) | Switching -over utmost point structure | |
| CN205071537U (en) | An electric appliance box | |
| CN204783168U (en) | Magnetizing devcie for oil filter | |
| CN208548245U (en) | A kind of layer insulation high frequency transformer | |
| CN203691857U (en) | Electromagnetic field shielding can | |
| CN204741664U (en) | Electromagnetic heating product of switching power supply circuit area EMC shield cover | |
| CN205961571U (en) | Aluminium base board suitable for anti electromagnetic wave | |
| CN210578145U (en) | Energy-saving efficient motor assembly for unmanned aerial vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140319 |