CN103322044B - A kind of axial magnetic bearing with annular heat radiation structure - Google Patents
A kind of axial magnetic bearing with annular heat radiation structure Download PDFInfo
- Publication number
- CN103322044B CN103322044B CN201310228470.9A CN201310228470A CN103322044B CN 103322044 B CN103322044 B CN 103322044B CN 201310228470 A CN201310228470 A CN 201310228470A CN 103322044 B CN103322044 B CN 103322044B
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- China
- Prior art keywords
- heat radiation
- magnetic bearing
- axial magnetic
- fin
- radiation structure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/005—Cooling of bearings of magnetic bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0476—Active magnetic bearings for rotary movement with active support of one degree of freedom, e.g. axial magnetic bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0459—Details of the magnetic circuit
- F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
Abstract
The invention provides a kind of axial magnetic bearing with annular heat radiation structure, comprise axial magnetic bearing pedestal, the annular heat radiation structure at the pedestal back side and coil, the axial magnetic bearing pedestal back side processes circular radiating fin, can effective increasing heat radiation area.The present invention can improve the heat dissipation potential of axial magnetic bearing, applies under being applicable to big current condition.
Description
Technical field
The present invention relates to a kind of axial magnetic bearing with annular heat radiation structure, belong to electromagnetic bearing technical field.
Background technique
Active magnetic bearing system by rotor suspension by electromagnetic force, is had without friction, rotating speed is high, be easy to the advantages such as control.In some heavily loaded occasions, require that magnetic bearing has higher bearing capacity, often need, by larger current in magnetic bearing coil, higher heat certainly will be produced.If can not effective cooling, magnetic bearing coil insulation material be likely burnt, and causes the serious consequences such as short circuit.
Magnetic bearing can be lowered the temperature by introducing the means such as cooling air, but under some condition, the installation conditions of ventilation equipment is limited, cannot rely on extraneous cooling magnetic bearing, bring difficulty to the design of magnetic bearing.
Summary of the invention
In order to solve technical problem of the prior art, the invention provides a kind of axial magnetic bearing with annular heat radiation structure, effectively can improve the heat dissipation potential of axial magnetic bearing, be applicable to using under conditions of high current.
The technological scheme that technical solution problem of the present invention adopts is: a kind of axial magnetic bearing with annular heat radiation structure, comprise axial magnetic bearing pedestal, the annular heat radiation structure at the pedestal back side and coil, the axial magnetic bearing pedestal back side arranges circular radiating fin, can effective increasing heat radiation area.The present invention can improve the heat dissipation potential of axial magnetic bearing, applies under being applicable to big current condition.This axial magnetic bearing both may be used for vertical magnetic bearing arrangement, also may be used for horizontal magnetic bearing system.
Described annular heat radiation structure and axial magnetic bearing pedestal one-body molded, it directly can be processed to form at the axial magnetic bearing pedestal back side.
Described annular heat radiation structure is axial symmery shape, avoids the axial symmetry affecting magnetic field.
Described annular heat radiation structure can adopt circular radiating fin.
The present invention, owing to adopting technique scheme, effectively can improve the heat dissipation potential of axial magnetic bearing, is applicable to using under conditions of high current.
Accompanying drawing explanation
Fig. 1 is the sectional side view (locally) of the present invention with the axial magnetic bearing of annular heat radiation structure.
Fig. 2 is the pedestal structure figure of the present invention with the axial magnetic bearing of annular heat radiation structure.
Fig. 3 is the longitdinal cross-section diagram of the straight tabular radiating fin of the present invention.
Fig. 4 is the longitdinal cross-section diagram of the stepped radiating fin of the present invention.
Wherein: the annular heat radiation structure 2 at axial magnetic bearing pedestal 1, the pedestal back side, coil 3.
Embodiment
Below in conjunction with the drawings and specific embodiments, technological scheme of the present invention is described in detail.
Embodiment: with reference to Fig. 1, Fig. 2, annular heat radiation structure 2 is processed at the back side of axial magnetic bearing pedestal 1, radiating fin can be processed as, 4 layers, 5 layers, 6 layers, 7 layers or more layers can be set to, determine according to base material and required heat dissipating capacity, it can make bearing back heat diffusion area improve more than 2 times.Concrete processing method is depending on base material feature.When needs comparatively large bearing capacity, when namely passing into religion big current in coil 3, coil 3 produces larger heat, by annular heat radiation structure 2, these heats are delivered in environment faster, improve the heat dissipation potential of axial magnetic bearing, reduce coil 3 temperature, avoid occurring the serious accidents such as insulating material burns, short circuit.
In order to ensure good radiating effect, inventor, through repeatedly accurate experiment, is also optimized the design form of radiating fin.Fig. 3 is the longitudinal cross-section close-up schematic view of finless parts.As shown in Figure 3, the height H of radiating fin and the ratio H/D1 of thickness D1 are 4/1-8/1.Claimant finds, if D1/H numerical value too low being difficult to has great heat radiation effect, and the too high material of not only wasting of numerical value increases cost, radiating effect also can be caused to reduce on the contrary (claimant by analysis, thinks that this reason may be reduce because too high D1/H can affect air convection efficiency).Simultaneously, to be preferably more than 4/1-1/4. numerical value be also find (D2-D1) based on claimant to increase limited if/D1 is too large due to surface area to ratio (the D2-D1)/D1 that meets of the thickness D1 of the distance D2 between adjacent fins axis and radiating fin, radiating effect is not good, and (D2-D1) also can cause air convection efficiency step-down if/D1 is too little thus reduces radiating effect on the contrary.
Or as shown in Figure 4, radiating fin longitudinally cross section has ladder, adopt this design can improve air circulation while increasing heat-delivery surface further.Now, the scope of the ratio H/D1 of the height H of fin and the bottom thickness D1 of fin is 3/1 to 6/1, it is 3/1 to 1/2. preferred that distance D2 between adjacent heat radiation fin axes and radiating fin bottom thickness D1 meets ratio (D2-D1)/D1 scope, radiating fin has N level ladder (N>=3), evenly thinning to fin heads every one-level fin from fin bottom, next stage fin has 4 grades of ladders than thinning 100%*D2/N. such as the N=4 in Fig. 4 of upper level fin, fin bottom portion thickness and first order fin thickness are D2, second level 100%*D2/4=25%*D2 more thinning than the first order, then second level thickness is the D2 of 75%, by that analogy, third level thickness is the D2 of 50%, afterbody is the D2. of 25%
Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Claims (4)
1. the axial magnetic bearing with annular heat radiation structure, it comprises axial magnetic bearing pedestal (1), coil (3), it is characterized in that: axial magnetic bearing pedestal (1) back side is provided with annular heat radiation structure (2), can effective increasing heat radiation area; Described annular heat radiation structure (2) is circular radiating fin; Described circular radiating fin is axial symmery shape, to avoid the axial symmetry affecting magnetic field; Described circular radiating fin is set to multilayer; Described circular radiating fin longitudinal cross-section is straight tabular, the scope of the ratio H/D1 of its height H and thickness D1 is 4/1 to 8/1, and it is 4/1 to 1/4 that the thickness D1 of the distance D2 between adjacent heat radiation fin axes and radiating fin meets ratio (D2-D1)/D1 scope; Or described circular radiating fin longitudinal cross-section is stepped, the scope of the ratio H/D1 of its height H and bottom thickness D1 is 3/1 to 6/1, and it is 3/1 to 1/2 that the distance D2 between adjacent heat radiation fin axes and radiating fin bottom thickness D1 meets ratio (D2-D1)/D1 scope.
2. a kind of axial magnetic bearing with annular heat radiation structure according to claim 1, it is characterized in that: described annular heat radiation structure (2) is one-body molded with axial magnetic bearing pedestal (1), or annular heat radiation structure (2) is directly processed to form at axial magnetic bearing pedestal (1) back side.
3. a kind of axial magnetic bearing with annular heat radiation structure according to claim 1, is characterized in that: described circular radiating fin is set to 5 layers.
4. a kind of axial magnetic bearing with annular heat radiation structure according to claim 1, it is characterized in that: when described circular radiating fin longitudinal cross-section is stepped, radiating fin has altogether N level ladder, wherein N>=3, and every one-level fin is evenly thinning from fin bottom portion to fin top, next stage fin 100%*D2/N more thinning than upper level fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310228470.9A CN103322044B (en) | 2013-06-08 | 2013-06-08 | A kind of axial magnetic bearing with annular heat radiation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310228470.9A CN103322044B (en) | 2013-06-08 | 2013-06-08 | A kind of axial magnetic bearing with annular heat radiation structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103322044A CN103322044A (en) | 2013-09-25 |
| CN103322044B true CN103322044B (en) | 2016-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310228470.9A Active CN103322044B (en) | 2013-06-08 | 2013-06-08 | A kind of axial magnetic bearing with annular heat radiation structure |
Country Status (1)
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| CN (1) | CN103322044B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438697A (en) * | 2016-11-21 | 2017-02-22 | 南京磁谷科技有限公司 | Axial magnetic bearing structure |
| CN106402175B (en) * | 2016-11-21 | 2019-09-03 | 南京磁谷科技有限公司 | A kind of bearing cooling structure |
| CN107387562A (en) * | 2017-08-29 | 2017-11-24 | 南京磁谷科技有限公司 | A kind of coaxial electromagnet structure of thrust magnetic bearing |
| CN110094419B (en) * | 2019-05-20 | 2020-06-23 | 珠海格力电器股份有限公司 | Axial magnetic suspension bearing, motor, compressor and air conditioner |
| CN211501342U (en) * | 2019-12-27 | 2020-09-15 | 南京磁谷科技有限公司 | Auxiliary magnetic bearing rotor heat radiation structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100784126B1 (en) * | 2006-08-11 | 2007-12-12 | 전자부품연구원 | Magnetic bearing actuator |
| WO2009041232A1 (en) * | 2007-09-26 | 2009-04-02 | Ntn Corporation | Hydrodynamic bearing device |
| CN201575073U (en) * | 2009-10-30 | 2010-09-08 | 左林林 | Bearing provided with heat dissipation structure |
| CN202266599U (en) * | 2011-12-23 | 2012-06-06 | 宁波市镇海银球轴承有限公司 | Bearing seat capable of radiating |
| CN102852975A (en) * | 2012-09-14 | 2013-01-02 | 清华大学 | Multilayer series-connected axial magnetic bearing structure |
| CN202883750U (en) * | 2012-10-25 | 2013-04-17 | 常州青峰亿康机械有限公司 | Bearing seat with cooling function |
-
2013
- 2013-06-08 CN CN201310228470.9A patent/CN103322044B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100784126B1 (en) * | 2006-08-11 | 2007-12-12 | 전자부품연구원 | Magnetic bearing actuator |
| WO2009041232A1 (en) * | 2007-09-26 | 2009-04-02 | Ntn Corporation | Hydrodynamic bearing device |
| CN201575073U (en) * | 2009-10-30 | 2010-09-08 | 左林林 | Bearing provided with heat dissipation structure |
| CN202266599U (en) * | 2011-12-23 | 2012-06-06 | 宁波市镇海银球轴承有限公司 | Bearing seat capable of radiating |
| CN102852975A (en) * | 2012-09-14 | 2013-01-02 | 清华大学 | Multilayer series-connected axial magnetic bearing structure |
| CN202883750U (en) * | 2012-10-25 | 2013-04-17 | 常州青峰亿康机械有限公司 | Bearing seat with cooling function |
Also Published As
| Publication number | Publication date |
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| CN103322044A (en) | 2013-09-25 |
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