CN1771651A - A motor without bearing - Google Patents
A motor without bearing Download PDFInfo
- Publication number
- CN1771651A CN1771651A CNA038264862A CN03826486A CN1771651A CN 1771651 A CN1771651 A CN 1771651A CN A038264862 A CNA038264862 A CN A038264862A CN 03826486 A CN03826486 A CN 03826486A CN 1771651 A CN1771651 A CN 1771651A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- magnetic texure
- axle center
- texure
- bearingless motors
- 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.)
- Granted
Links
- 238000010276 construction Methods 0.000 claims description 22
- 241000883990 Flabellum Species 0.000 claims description 18
- 239000004568 cement Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000011359 shock absorbing material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000010687 lubricating oil Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011049 pearl Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
- F16C17/08—Sliding-contact bearings for exclusively rotary movement for axial load only for supporting the end face of a shaft or other member, e.g. footstep bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
-
- 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
- F16C39/00—Relieving load on bearings
- F16C39/06—Relieving load on bearings using magnetic means
- F16C39/063—Permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/09—Structural association with bearings with magnetic bearings
-
- 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
- F16C2380/00—Electrical apparatus
- F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of motor without bearing, comprising a stator, a rotor, a upper magnetic structure and a lower magnetic structure. The stator is located in a housing, the rotor is located in the housing and configured correspondingly with the stator. The rotor is provided with a shaft , which extends axially and protrudes from the rotor, and the shaft does not contact with the stator or the housing. The lower magnetic structure is located on the bottom of the housing , and the upper magnetic structure is located on the top of the housing. Meanwhile, the positions of the upper magnetic structure and the lower magnetic structure are opposite axially .Thereinto, the upper magnetic structure and the lower magnetic structure attract each other, and the shaft is fixed between the upper magnetic structure and the lower magnetic structure by the attraction .
Description
Bearingless motors
Technical field
The present invention is on a kind of motor, especially with regard to a kind of bearingless motors (non-bear ing motor) with power height, long lifespan and low noise.
Background technology
In motor now, in order that it can smoothly be operated, it is usually the axial portions that rotor is coated by bearing, so that its rotor can smoothly be operated against the support of bearing.Known bearing is for Bearing bearing, oiliness bearing (S l eeveBear ing), hydrodynamic bearing, magnetic bearing etc., however, foregoing each bearing all has respective advantage and disadvantage.Bearing bearing is also known as ball bearing（Ba l lBear ing), it is made up of outer shroud, inner ring and multiple Jin Shu Round pearls, wherein each Jin Shu Round pearls are located between inner ring and outer shroud.Because the running of kind of bearings is to belong to the rotation of Round pearls by multiple gold and carry out, and each metal ball and inner ring（Or outer shroud）Between contact be to belong to contact, therefore do operate it is relatively easy.However, because the structure of kind of bearings is quite fragile, therefore it can not bear the impact of external force.Furthermore, when the motor running using this bearing.Because metal Hui Zhu is to run in a rolling manner, therefore larger noise can be produced at high speed.Furthermore, because the precision demand of metal ball, inner ring, outer shroud is higher, therefore its price is high.
Oiliness bearing is also known as powder sintered self-lubricating bearing, and it is to mix to sinter out bearing configuration after the metal dusts such as copper powder, iron powder, nickel powder, lead powder, then lubricating oil is immersed in bearing pore and formed.When using oiliness bearing in motor, oiliness bearing is affixed to the center of motor stator, then the axle center of rotor is placed in bearing, now needs to keep an appropriate gap between bearing and axle center.
When the motor is running, lubricating oil can ooze out from bearing, so that rotor rotates in the case of with lubrication.The impact resistance of kind of bearings is higher than ball bearing, and its price is also relatively cheap.However, when using kind of bearings in motor, long-term operating can be evaporated the lubricating oil in bearing, and make axle center and bearing direct friction, or even the nitride for hindering operating is formed at the two ends of bearing, and it is easily damaged and increased its noise content.In addition, the dust in air can also be inhaled into motor cores because of the operating of fan motor, it can be mixed into greasy filth with the lubricating oil being stored in around bearing, in turn result in running noise, or even stuck not turn.Furthermore, the gap in bearing and axle center is small, and the operating startup effect of motor is poor.
Hydrodynamic bearing is for the deformation of foregoing oiliness bearing, it is in the arrowhead-shaped grooves of the circle of formation two in interior sidewall surface, when motor running, to make the lubricating oil in bearing extrude from arrow both sides towards flute tips portion with air, and form two gas-oil rings to support axle center.When motor uses kind of bearings, because its oil gas is to converge at flute tips portion, therefore its oil gas is less easy to lose and make its service life longer than oiliness bearing.However, the groove on the inside of hydrodynamic bearing, need to can just be formed via the procedure for processing of superprecision, and need accurately to grasp the gap between axle center and bearing, therefore the production cost of hydrodynamic bearing is far above foregoing each bearing.Furthermore, when motor rotary speed is low, because oil gas can not form gas-oil ring, thus dynamic pressure effect at this moment can not be produced at low turn, and make its effect identical with oiliness bearing.
Magnetic bearing, is that multiple N-S magnetic poles are formed on axle center, and is formed and axle center identical N-S magnetic poles in the relative position of bearing, when motor running, to make axle center be suspended on bearing by magnetic repulsion.Due to not contacted with each other between axle center and bearing now, thus its operating when compared with without friction noise the problem of.However, because the design of current magnetic bearing is that the spacing for making axle center and bearing under static is maintained at 0. below 2mm, thus the bearing each several part around axle center is Xiang the Round hearts
Produced thrust is equal and repeals by implication, now when axle center produces skew because of external force or the driving force of its operating, its balance can be then destroyed, and axle center is easily mutually collided with bearing when operating it, and then make its noise increase, the lost of life, operating that can not even smooth out.
Furthermore, foregoing magnetic bearing is also because of the reason of its magnetic balance, and the problem of occur smoothly to start etc..Therefore, magnetic bearing still can not smoothly enter the volume production stage in the experimental stage at present.The content of the invention therefore, to solve the above problems, the present invention is to propose a kind of bearingless motors, so that motor running noise content is greatly reduced.Furthermore, the present invention separately proposes a kind of bearingless motors, to greatly improve the motor running life-span.Furthermore, the present invention separately proposes a kind of bearingless motors, so that production cost is greatly reduced.Therefore, the present invention is to provide a kind of bearingless motors, by being constituted due to structure, rotor structure, upper and lower magnetic texure.Stator structure is located in housing, rotor structure be also located in housing and it is corresponding with stator structure configure, rotor structure has an axle center, and axle center is axially extending prominent rotor structure, and axle center is not contacted with stator structure or housing.Magnetic structure is to be located at housing bottom, and upper magnetic texure is to be located at case top, and upper magnetic texure is to be located at respectively in the relative position of axial direction with magnetic structure.It is to attract each other wherein to go up magnetic texure and magnetic structure, and axle center is fixed between upper and lower magnetic texure by magnetic attraction.The bearingless motors of the invention described above, its axle center is attracted with upper magnetic texure（Or point contact）And magnetic structure attracts（Or point contact）Or simultaneously with upper and lower magnetic texure attract（Or point contact）.Furthermore, bearingless motors of the invention, it is possible to have an at least abrasion-proof structure are located between axle center and magnetic structure, between axle center and upper magnetic texure or between axle center and upper and lower magnetic texure.When axle center is in contact with abrasion-proof structure, its way of contact is for a contact.
The bearingless motors of the invention described above.Further include the magnetic texure being located on rotor structure and be located on this due to the stator magnetic conduction construction in structure, and the position of stator magnetic conduction construction is corresponding with the magnetic texure on rotor structure.The magnetic force center plane of the magnetic texure of rotor structure can be slightly above, slightly below or parallel to the magnetic force center plane of stator magnetic conduction construction in the axial direction.
Furthermore, in the bearingless motors of the invention described above, when its stator structure is coated in rotor structure, its axle center may extend into the opening in stator structure center, and can not contacted in opening sidewalls formation protection structure, this protection structure with the axle center.
In the bearingless motors of the invention described above, its axle center end surface configuration can be plane, arc-shaped, cone-shaped, inner sunken face or convex outward, and the end surface shape towards axle center of upper magnetic texure or magnetic structure is for plane, arc-shaped, cone-shaped, inner sunken face or convex outward.Wherein mutually put with upper magnetic texure or magnetic structure when axle center when contacting, axle center end surface shape is mutually corresponding with upper magnetic texure end surface shape or magnetic structure end surface shape.Furthermore, the end surface shape towards axle center of its abrasion-proof structure can also be plane, arc-shaped, cone-shaped, inner sunken face or convex outward, wherein mutually put with abrasion-proof structure when axle center when contacting, axle center end surface shape is mutually corresponding with abrasion-proof structure end surface shape.
In the bearingless motors of the invention described above, it is possible to have around the multiple flabellums of rotor structure periphery.These flabellums can be centrifugal type inpeller, flat flabellum or axial-flow type fan plan.Housing can also be made up of upper shell with lower house.The joint method of upper shell and lower house can for it is chimeric, fix, bind, it is sealed or rush structure via a Slow and be respectively and fixedly connected with.Upper shell is, for example, specifically that mutually corresponding button hook is combined with lower house.
In the bearingless motors of the invention described above, upper and lower magnetic texure and axle center are to share same axis.
Furthermore, the present invention separately provides a kind of bearingless motors, applies to fan motor, and it is made up of stator structure, rotor structure, multiple flabellums and support magnetic texure.Stator structure is that stator structure has an at least stator magnetic conduction construction, and stator magnetic conduction construction is located on due in structure on base.Rotor structure is located on base, and rotor structure has axle center and at least a magnetic texure, and axle center is axially extending prominent rotor structure.Magnetic texure is to be located on rotor structure and the position of magnetic texure is corresponding with due to magnetic conduction construction.Flabellum is that around rotor structure periphery, and support magnetic texure is affixed on base, and support magnetic texure is to fix axle center by magnetic attraction, and support magnetic texure is contacted in the way of a contact with axle center.Wherein, the magnetic force center plane on rotor structure is in the axial direction slightly above due to the magnetic force center plane in structure.In the bearingless motors of the invention described above, its rotor axis only has a little to be in contact with stator structure, or even is not contacted completely because of buoyant gas when operating, therefore motor noise amount can be greatly reduced, the motor running life-span is improved.
Furthermore, bearing-free fan motor of the invention can be by airflow buoyancy when axle center magnetic attraction and fan running, and rotor axis is operated under discontiguous situation, and then motor noise amount can be greatly reduced, the motor running life-span is improved.
Furthermore, because the bearingless motors of the present invention are without the use of the bearing typically commonly used, therefore the manufacture of this component, assembly cost can be avoided, and then production cost is greatly reduced.
Brief description of the drawings Fig. 1 is the structural representation for the bearingless motors for illustrating the first preferred embodiment of the invention；Fig. 2 be illustrate the present invention second be lost good embodiment bearingless motors structural representation；Fig. 3 A to Fig. 3 D be illustrate the present invention the axle center of bearingless motors and the part of magnetic texure show
It is intended to;
Fig. 4 is the structural representation for the bearingless motors for illustrating the 3rd preferred embodiment of the invention；Fig. 5 is the structural representation for the bearingless motors for illustrating the 4th preferred embodiment of the invention.Symbol description：
100、 200、 300、 400:Bearingless motors
102、 208:Housing
102a:Upper shell
102b:Lower house
104：Stator structure
106:Rotor structure
108、 110、 118、 202、 202a, 202b, 202c, 202d、 302、 304、 402：Magnetic texure
112：Stator holder
114:Stator magnetic conduction construction
116、 116a, 116b, 116c, 116d:Axle center
120:Magnetic conduction iron-clad
122:Flabellum
124、 126、 206、 406、 408:Abrasion-proof structure 128:Protection structure 130:Opening
132：Rotor case
204、 404：Magnetic body
Pl、 P2:Magnetic force center plane
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and coordinate accompanying drawing, it is described in detail below：
Fig. 1 is the structural representation for the bearingless motors for illustrating the first preferred embodiment of the invention.It refer to Fig. 1, the bearingless motors 100 of the present invention are made up of housing 102, stator structure 104, rotor structure 106 and magnetic texure 108, wherein magnetic texure 108 and magnetic texure 110 are to attract each other, and the axle center 116 of magnetic texure 108,110 and the prominent rotor structure 106 of extension is to share an axis.In the bearingless motors 100 of the present invention, rotor structure 106 is only fixed between magnetic texure 108,110 by magnetic texure 108, the magnetic attraction in 110 pairs of its axle center 116.
Housing 102 is the protection shell as bearingless motors 100, to prevent each component in the inside of bearingless motors 100 from being damaged by external force.Housing 102 can be integrally formed, can also by upper shell 102a, under the body 102b that dies combine.Some recombinants can also be divided into form.Upper shell 102a and lower house 102b associated methods are, for example, chimeric, fix, bonding, it is sealed, rush structure via a Slow and be respectively and fixedly connected with.Furthermore, upper shell 102a is, for example, that mutual corresponding button hook is combined with lower house 102b（As shown in Figure 1）.
Stator structure 104 is located in housing 102, to produce induced-current or provide the aftermentioned driving force of rotor structure 106.Stator structure 104 is by circuit board（Do not illustrate）, due to fixed seat 112 and at least a stator magnetic conduction construction 114 is constituted, wherein stator structure 104 is not in contact with each other with aftermentioned axle center 116.Stator magnetic conduction construction 114 is located on stator structure 104, and with magnetic force center plane Pl.Stator magnetic conduction construction 114 is, for example, silicon steel sheet, electromagnet.
Rotor structure 106 is to be located in housing 102 and configuration corresponding with stator structure, this rotor structure
106 be can on housing 102 rotate.Rotor structure 106 is made up of axle center 116, rotor case 132, an at least magnetic texure 118, magnetic conduction iron-clad 120.Axle center 116 is axially extending prominent rotor structure 106, rotary shaft during being rotated as rotor structure 106.The end surface shape of axle center 116 is e.g. plane, arc-shaped, the male shape of point, inner sunken face, convex outward.
Magnetic texure 118 is located on rotor structure 106, and with magnetic force center plane P2.The position of magnetic texure 118 is mutually corresponding with stator magnetic conduction construction 114, and its magnetic force center plane P2 is to be parallel on axially upper slightly higher, axial direction or axially upper lower slightly with magnetic force center plane P1 position.Magnetic texure 118 is, for example, permanent magnet, plastic cement magnet.
In addition, multiple flabellums can also be surrounded with the periphery of rotor structure 106, when rotor structure 106 is rotated, the flowing of gas is nearby produced in bearingless motors 100.Flabellum 122 is, for example, centrifugal type inpeller, flat flabellum, axial-flow type flabellum.
Magnetic texure 108,110 is the bottom and top for being located at housing 102 respectively, and the distributing position of magnetic texure 108,110 is to be located at respectively on relative axial position.Wherein magnetic texure 108,110 is, for example, permanent magnet, plastic cement magnet, electromagnet.Magnetic texure 108,110 is fixed on housing 102 using the mode such as e.g. bonding, chimeric, fixing, engagement.The magnetic having towards the position of magnetic texure 110 of magnetic texure 108 is opposite with the magnetic having towards the position of magnetic texure 108 of magnetic texure 110.The surface configuration towards axle center 116 of magnetic texure 108,110 is that the surface configuration of magnetic texure 116 is e.g. plane, arc-shaped, cone-shaped, inner sunken face, convex outward mutually to put the curved surface contacted with the end surface shape of axle center 116.
Magnetic texure 108,110 and axle center 116 are located on same axis.By being together maintained on same axis by magnetic attraction between magnetic texure 108,110 and axle center 116, and axle center 116 is fixed between magnetic texure 108,110.When the end of bearingless motors 100 starts, axle center 116 is only
It is in contact, and is not in contact with other components outside rotor structure 106 with magnetic texure 108 in the way of a contact.
In addition, axle center 116 can also be changed to only be in contact with magnetic texure 110 in the way of a contact, and rotor structure 106 is set to be suspended in housing 102.Furthermore, axle center 116 can also be changed to only in the way of a contact while being in contact with magnetic texure 108,110, and rotor structure 106 is held on by magnetic texure 108,110 in housing 100.
Furthermore, in order to further improve the life-span of bearingless motors 100, an abrasion-proof structure 124,126 can also be formed between axle center 116 and magnetic texure 108,110, its axis 116 is only contacted with abrasion-proof structure 124, and is fixed on by the magnetic attraction of magnetic texure 108,110 between magnetic texure 108,110 at 126 points.Abrasion-proof structure 124,126 can be formed on magnetic texure 108,110 simultaneously, can also only be formed at the position that axle center 116 is in contact with magnetic texure（That is, only in formation abrasion-proof structure 124 on magnetic texure 108 or only in formation abrasion-proof structure 126 on magnetic texure 110).The generation type of abrasion-proof structure 124,126 is, for example, bonding, fixing, chimeric, engagement.Furthermore, abrasion-proof structure 124,126 can be in contact with magnetic texure 108,110, can not also be contacted with magnetic texure 108,110, it is only necessary on the axis that axle center 116 and magnetic texure 108,110 are constituted.
Furthermore; if in order to prevent bearingless motors 100 from making axle center 116 because of great external force during transport with being collided due to fixed seat 112; a protection structure 128 can also be formed on side opening 130 in stator holder 112, wherein protection structure 128 is not in contact with each other with axle center 116.The material of this protection structure 128 is, for example, plastic cement, elastic material, shock-absorbing material.
Fig. 2 is the structural representation for the bearingless motors 200 for illustrating the second preferred embodiment of the invention.It is to use identical label with previous embodiment identical component in this preferred embodiment.The difference of this preferred embodiment and the first preferred embodiment is that single magnetic junction is used only in this preferred embodiment
The axle center 116 of the adsorber rotor structure 106 of structure 202, and the magnetic force center plane P2 of magnetic texure 118 is above the magnetic force center plane Pl of stator magnetic conduction construction 114.In addition, the positions that contact of 202 points of axle center 116 and magnetic texure can slightly above, parallel to, slightly below magnetic force center plane P2.
In this preferred embodiment, magnetic texure 202 directly can be integrally formed by magnetisable material, can also be made up of abrasion-proof structure 206 and magnetic body 204.Furthermore, surface that magnetic texure 202 contacts with each other with axle center 116 or abrasion-proof structure 206 and the surface that axle center 116 contacts with each other are for curved surface that mutually point is contacted.The surface of abrasion-proof structure 206 or magnetic texure 202 is, for example, arc-shaped, cone-shaped, inner sunken face, convex outward.Then, the relation between axle center 116 and magnetic texure 202 is further illustrated with example.When axle center 116a end is the cone-shaped or arc curve of evagination, the surface of magnetic texure can be inner sunken face as shown in Figure 3A or the indent conical surface as shown in Figure 3 B.When the surface of magnetic texure 202 is the cone-shaped or arc curve of evagination, axle center 116a end surface can be inner sunken face as shown in Figure 3 C or the indent conical surface as shown in Figure 3 D.
Fig. 4 is the structural representation for the ο of bearingless motors 30 for illustrating the 3rd preferred embodiment of the invention.It is to use identical label with previous embodiment identical component in this preferred embodiment.The difference of this preferred embodiment and the second preferred embodiment is that this preferred embodiment is to form magnetic texure 304 in all tops of reservation 112 of stator, and in forming magnetic texure 302 on rotor case 132, wherein magnetic texure 302,304 is mutual magnetic attachment and is not in contact with each other.Magnetic texure 304 is not in contact with stator magnetic conduction construction 114, and magnetic texure 304 preferably on axial direction be higher than stator magnetic conduction construction 114.The shape Li of magnetic texure 304 such as Shi Round ring-types, fan-shaped, bulk, strip, and shape and the position of magnetic texure 302 are mutually corresponding with magnetic texure 302.
Furthermore, magnetic texure 304 and mode such as dynamic circuit connector, chimeric, fixing, engagement that stator holder 112 is combined.The mode that magnetic texure 302 is combined with rotor case 132 for example binds, it is chimeric,
Fix, engage.
Fig. 5 is the structural representation for the bearingless motors 400 for illustrating the 4th preferred embodiment of the invention.It is to use identical label with previous embodiment identical component in this preferred embodiment.The difference of this preferred embodiment and the 3rd preferred embodiment is this preferred embodiment only in the top of housing 102（That is, upper shell 102a) on form magnetic texure 402, and the magnetic force center plane P2 of magnetic texure 118 is less than the magnetic force center plane Pl of stator magnetic conduction construction 114.Furthermore, abrasion-proof structure 408 can also be formed on lower house 102b, the positions that 408 points of its axis 116 and this abrasion-proof structure are contacted can slightly above, ' parallel to, slightly below magnetic force center plane Pl.
In this preferred embodiment, magnetic texure 402 directly can be integrally formed by magnetisable material, can also be made up of abrasion-proof structure 406 and magnetic body 404.Furthermore, surface that magnetic texure 402 contacts with each other with axle center 116, abrasion-proof structure 406 and axle center or abrasion-proof structure 408 and the surface that axle center 116 contacts with each other are for curved surface that mutually point is contacted.The surface of abrasion-proof structure 406,408 or magnetic texure 402 be for axle center 116 mutually corresponding convex surface or concave, e.g. arc-shaped, cone-shaped, inner sunken face, convex outward.
In addition, though the bearingless motors of the present invention are illustrated exemplified by suitable for tube-axial fan motor, so it is not limited thereto, is readily applicable to various types of motors such as Frame-free fan motor, centrifugal fan motor, external-rotor motor, inner rotor motor.
In the bearingless motors of the invention described above, its rotor axis only has a little to be in contact with due to structure, or even is not contacted completely because of buoyant gas when operating, therefore motor noise amount can be greatly reduced, the motor running life-span is improved.
Furthermore, the airflow buoyancy that bearing-free fan motor of the invention can be by axle center magnetic attraction in fan running, and rotor axis is operated under discontiguous situation, and then horse can be greatly reduced
Up to noise content, improve the motor running life-span.
Furthermore, because the bearingless motors of the present invention are without the use of the bearing typically commonly used, therefore the manufacture of this component, assembly cost can be avoided, and then production cost is greatly reduced.
Claims (33)
- Claim1. a kind of bearingless motors, it is characterised in that the motor includes：One stator structure, in a housing；One rotor structure, in the housing and configuration corresponding with the stator structure, the rotor structure has an axle center, and the axle center do not contact with the stator structure or the housing；One first magnetic texure, positioned at the bottom of the housing；AndOne second magnetic texure, positioned at the top of the housing, and first magnetic texure is to be located at respectively in the relative position of axial direction with second magnetic texure；Wherein first magnetic and second magnetic texure are to attract each other, and the axle center is fixed between first magnetic texure and second magnetic texure by magnetic attraction, and first magnetic texure, second magnetic texure and the axle center are to share an axis.2. bearingless motors according to claim 1, it is characterised in that：The axle center is to be in contact with first magnetic texure or magnetic attachment, be in contact with second magnetic texure or magnetic attachment or be in contact or magnetic attachment with first magnetic texure and second magnetic texure simultaneously,The wherein way of contact is for a contact.3. bearingless motors according to claim 1, it is characterised in that：An at least abrasion-proof structure is further included, positioned at one of group constituted between the axle center and first magnetic texure, between the axle center and second magnetic texure and between the axle center and first magnetic texure and second magnetic texure.4. bearingless motors according to claim 3, it is characterised in that：The axle center is in contact with the abrasion-proof structure, and the way of contact is for a contact.5. bearingless motors according to claim 1, it is characterised in that：The bearingless motors Pattern be one of group for being constituted selected from tube-axial fan motor, centrifugal fan motor, inner rotor motor, external-rotor motor.6. bearingless motors according to claim 1, it is characterised in that：The magnetic at the position towards second magnetic texure of first magnetic texure is opposite with the magnetic at the position towards first magnetic texure of second magnetic texure.7. bearingless motors according to claim 1, it is characterised in that further include：At least one the 3rd magnetic texure, is located on the rotor structure, and the 3rd magnetic texure is that have one first magnetic force center plane；At least a stator magnetic conduction construction, is located on the stator structure, and the position of the stator magnetic conduction construction is corresponding with the 3rd magnetic texure, and the stator magnetic conduction construction is that have one second magnetic force center plane；Wherein the first magnetic force center plane be in the axial direction it is parallel, slightly higher or slightly below the second magnetic force center plane.8. bearingless motors according to claim 1, it is characterised in that：When the stator structure is coated in the rotor structure, further include：The axle center is extended into an opening in stator structure center；AndOne protection structure, positioned at the opening sidewalls, and is not contacted with the axle center.9. bearingless motors according to claim 8, it is characterised in that：The protection structure is to be selected from one of group that plastic cement, elastic material, shock-absorbing material are constituted.1 0. bearingless motors according to claim 1, it is characterised in that：The axle center end surface configuration is to be selected from one of group that plane, Round arcuations, cone-shaped, inner sunken face, convex outward are constituted；And The end surface shape in first magnetic texure or the direction of second magnetic texure axle center is to be selected from one of group that plane, arc-shaped, cone-shaped, inner sunken face, convex outward are constituted；Wherein mutually put when contacting when the axle center with first magnetic texure or second magnetic texure, the axle center end surface shape is mutually corresponding with the first magnetic texure end surface shape or the second magnetic texure end surface shape.11. bearingless motors according to claim 3, it is characterised in that：The axle center end surface configuration is to be selected from one of group that plane, arc-shaped, cone-shaped, inner sunken face, convex outward are constituted；AndThe end surface shape in the direction of the abrasion-proof structure axle center is to be selected from one of group that plane, arc-shaped, cone-shaped, inner sunken face, convex outward are constituted；Wherein mutually put with the abrasion-proof structure when the axle center when contacting, the axle center end surface shape is mutually corresponding with the abrasion-proof structure end surface shape.12. bearingless motors according to claim 1, it is characterised in that：A plurality of flabellums are further included, around the rotor structure periphery, the wherein flabellum is to be selected from one of group that centrifugal type inpeller, flat flabellum, axial-flow type flabellum are constituted.13. bearingless motors according to claim 1, it is characterised in that：First magnetic texure and second magnetic texure are to be selected from one of group that permanent magnet, plastic cement magnet, electromagnet are constituted.14. bearingless motors according to claim 1, it is characterised in that：The housing is to be made up of a upper shell with a lower house, the upper shell and the lower house be for mutual corresponding button hook structure, and the upper shell and the joint method of the lower house be selected from chimeric, fixing, bind, it is sealed, structure rushed via a Slow be respectively and fixedly connected with one of constituted group.15. bearingless motors according to claim 1, it is characterised in that：First magnetic texure and second magnetic texure are selected from one of constituted group of bonding, chimeric, fixing, engagement with the mode that the housing is engaged.16. a kind of bearingless motors, apply to a fan motor, it is characterised in that the motor includes：One stator structure, on the base of a housing, the stator structure has an at least stator magnetic conduction construction, and the stator magnetic conduction construction is located on the stator structure, and the stator magnetic conduction construction is that have one first magnetic force center plane；One rotor structure, on the base, the rotor structure has an axle center and at least one first magnetic texure, the axle center is the axially extending protrusion rotor structure, first magnetic texure is located on the rotor structure, and the position of first magnetic texure is corresponding with the stator magnetic conduction construction, first magnetic texure has one second magnetic force center plane；A plurality of flabellums, around the rotor structure periphery；One second magnetic texure, is fixed on the housing, and second magnetic texure is to fix the axle center by magnetic attraction, and second magnetic texure is contacted in the way of a contact with the axle center；Wherein the second magnetic force center plane is slightly higher or is slightly below the first magnetic force center plane, and second magnetic texure and the axle center are to share an axis.17. bearingless motors according to claim 16, it is characterised in that：When second magnetic texure is fixed on the base, the second magnetic force center plane is slightly above the first magnetic force center plane in the axial direction；AndWhen second magnetic texure is fixed on the top of the housing, the second magnetic force center plane is slightly below the first magnetic force center plane in the axial direction.1 8. bearingless motors according to claim 17, it is characterised in that：The axle center is in contact with second magnetic texure, and the way of contact is for a contact.19. the bearingless motors according to claim 17, it is characterised in that：At least one first abrasion-proof structure is further included, between the axle center and second magnetic texure.20. the bearingless motors according to claim 19, it is characterised in that：The axle center is in contact with first abrasion-proof structure, and the way of contact is for a contact.21. bearingless motors according to claim 17, it is characterised in that：Including at least one second abrasion-proof structure, on the housing, and it is corresponding with the other end away from second magnetic texure in the axle center, the axle center is mutually put with second abrasion-proof structure and contacted.22. bearingless motors according to claim 16, it is characterised in that：The pattern of the fan motor is to be selected from one of group that tube-axial fan motor, centrifugal fan motor, Frame-free fan motor are constituted.2 3. bearingless motors according to claim 17, it is characterised in that further include：The axle center is extended into an opening in stator structure center；AndOne protection structure, positioned at the opening sidewalls, and is not contacted with the axle center.24. the bearingless motors according to claim 23, it is characterised in that：The protection structure is to be selected from one of group that plastic cement, elastic material, shock-absorbing material are constituted.25. the bearingless motors according to claim 16, it is characterised in that：The axle center end surface configuration is to be selected from one of group that plane, arc-shaped, cone-shaped, inner sunken face, convex outward are constituted；The end surface shape in the direction of second magnetic texure axle center is to be selected from one of group that plane, arc-shaped, cone-shaped, inner sunken face, convex outward are constituted； Wherein mutually put with second magnetic texure when the axle center when contacting, the axle center end surface shape is mutually corresponding with the second magnetic texure end surface shape.26. the bearingless motors according to claim 19 or 21, it is characterised in that：The axis client surface configuration is to be selected from one of group that plane, arc-shaped, cone-shaped, inner sunken face, convex outward are constituted；AndThe end surface shape in the direction axle center of one of the group being made up of first abrasion-proof structure and second abrasion-proof structure is to be selected from one of group that plane, Round arcuations, cone-shaped, inner sunken face, convex outward are constituted；Wherein when mutually point is contacted for one of the axle center and group for being made up of first abrasion-proof structure and second abrasion-proof structure, the end surface shape of one of the axle center end surface shape and the group that is made up of first abrasion-proof structure and second abrasion-proof structure is mutual corresponding.27. bearingless motors according to claim 16, it is characterised in that：The flabellum is to be selected from one of group that centrifugal type inpeller, flat flabellum, axial-flow type flabellum are constituted.28. the bearingless motors according to claim 16, it is characterised in that：Second magnetic texure is to be selected from one of group that permanent magnet, plastic cement magnet, electromagnet are constituted.29. bearingless motors according to claim 16, it is characterised in that：The housing is to be made up of a upper shell with a lower house, the upper shell and the lower house combines for mutual corresponding button hook, and the upper shell and the joint method of the lower house be selected from chimeric, fixing, bind, it is sealed, structure rushed via a Slow be respectively and fixedly connected with one of constituted group.30. bearingless motors according to claim 16, it is characterised in that：Second magnetic texure is selected from one of constituted group of bonding, chimeric, fixing, engagement with the mode that the housing is combined.31. the bearingless motors according to claim 16, it is characterised in that：The axle center and the abutment of second magnetic texure are above, are less than or parallel to the second magnetic force center plane or the first magnetic force center plane.32. the bearingless motors according to claim 16, it is characterised in that further include：One the 3rd magnetic texure, at the top of a stator holder of the stator structure；And one the 4th magnetic texure, on the housing of the rotor structure；Wherein the 3rd magnetic texure and the 4th magnetic texure are to attract each other, and are not in contact with each other.3 3. bearingless motors according to claim 32, it is characterised in that：The pattern of 3rd magnetic texure is one of group that Xuan Zi Round ring-types, fan-shaped, bulk, strip are constituted, and the 3rd magnetic texure and the mode that the stator holder is combined be selected from bonding, it is chimeric, fix, engage one of constituted group；AndThe pattern of 4th magnetic self-structure is corresponding with the 3rd magnetic texure with position, and the 4th magnetic texure is selected from one of constituted group of bonding, chimeric, fixing, engagement with the mode that the housing is engaged.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2003/000804 WO2005029684A1 (en) | 2003-09-22 | 2003-09-22 | A motor without bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1771651A true CN1771651A (en) | 2006-05-10 |
| CN100472916C CN100472916C (en) | 2009-03-25 |
Family
ID=34318857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038264862A Expired - Lifetime CN100472916C (en) | 2003-09-22 | 2003-09-22 | A motor without bearing |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP2007507193A (en) |
| CN (1) | CN100472916C (en) |
| AU (1) | AU2003272842A1 (en) |
| DE (1) | DE10394240B4 (en) |
| GB (1) | GB2417616B (en) |
| WO (1) | WO2005029684A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135138A (en) * | 2010-01-22 | 2011-07-27 | 米克罗内尔有限公司 | Device with a stator and a rotor laid within the stator |
| CN110552915A (en) * | 2018-06-01 | 2019-12-10 | 宏碁股份有限公司 | Fan and balance ring for fan |
| US11187248B2 (en) | 2018-04-26 | 2021-11-30 | Acer Incorporated | Fan and balance ring for fan |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7478574B2 (en) * | 2005-04-26 | 2009-01-20 | Igarashi Electric Works, Ltd. | Electric actuator |
| DE102010051262A1 (en) * | 2010-11-12 | 2012-05-31 | Secop Gmbh | Refrigeration compressor i.e. hermetically-sealed refrigeration compressor, for use in e.g. freezer, has stator provided with bundle of laminations, where axial center of bundle of laminations is located higher than axial center of magnets |
| CN103618422B (en) * | 2013-12-23 | 2016-08-17 | 中国航天空气动力技术研究院 | Electromagnetic drive fan device |
| CN108204873B (en) * | 2016-12-20 | 2020-05-22 | 陈恰 | Magnetic capture non-inductive torque sensor |
| TWI761937B (en) | 2020-09-02 | 2022-04-21 | 利愛電氣股份有限公司 | Generator having outer-rotor structure |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT182443B (en) * | 1953-04-22 | 1955-06-25 | Roulements A Billes Miniatures | Magnetic bearing for a rotating part of a measuring instrument, in particular an electricity meter |
| DE2457783C2 (en) * | 1974-12-06 | 1986-10-09 | Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar | Magnetic storage |
| DE3300889A1 (en) * | 1983-01-13 | 1984-07-19 | Bosch Gmbh Robert | CIRCUIT PUMP WITH MAGNETICALLY BEARED ROTOR |
| NL8502058A (en) * | 1985-07-17 | 1987-02-16 | Philips Nv | ELECTRICAL MACHINE WITH MAGNETIC BEARING FEATURES. |
| US5528096A (en) * | 1992-10-29 | 1996-06-18 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Small brush-use DC motor |
| CN2324693Y (en) * | 1998-01-21 | 1999-06-16 | 王文阁 | Magnetic suspension type bearing electric motor |
| JP2000046043A (en) * | 1998-07-28 | 2000-02-15 | Tokyo Parts Ind Co Ltd | Bearing structure for small-size motor |
| DE29820982U1 (en) * | 1998-11-24 | 1999-09-30 | Jagmann Vladimir | Mechanical arrangement |
| CN1185777C (en) * | 1999-08-11 | 2005-01-19 | 台达电子工业股份有限公司 | Magnetic-bearing motor |
| KR100330707B1 (en) * | 2000-03-29 | 2002-04-03 | 이형도 | Non-contact driving motor |
| JP2003092852A (en) * | 2001-09-18 | 2003-03-28 | Nippon Keiki Works Ltd | Thrust bearing structure of motor |
| US6700241B1 (en) * | 2002-11-27 | 2004-03-02 | Sunonwealth Electric Machine Industry Co., Ltd. | Positioning device for prestressing magnet of spindle motor |
-
2003
- 2003-09-22 AU AU2003272842A patent/AU2003272842A1/en not_active Abandoned
- 2003-09-22 GB GB0523430A patent/GB2417616B/en not_active Expired - Fee Related
- 2003-09-22 WO PCT/CN2003/000804 patent/WO2005029684A1/en active Application Filing
- 2003-09-22 CN CNB038264862A patent/CN100472916C/en not_active Expired - Lifetime
- 2003-09-22 DE DE10394240.8T patent/DE10394240B4/en not_active Expired - Fee Related
- 2003-09-22 JP JP2005508967A patent/JP2007507193A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135138A (en) * | 2010-01-22 | 2011-07-27 | 米克罗内尔有限公司 | Device with a stator and a rotor laid within the stator |
| US11187248B2 (en) | 2018-04-26 | 2021-11-30 | Acer Incorporated | Fan and balance ring for fan |
| CN110552915A (en) * | 2018-06-01 | 2019-12-10 | 宏碁股份有限公司 | Fan and balance ring for fan |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10394240B4 (en) | 2014-07-31 |
| JP2007507193A (en) | 2007-03-22 |
| GB2417616B (en) | 2008-01-02 |
| AU2003272842A1 (en) | 2005-04-11 |
| GB0523430D0 (en) | 2005-12-28 |
| GB2417616A (en) | 2006-03-01 |
| CN100472916C (en) | 2009-03-25 |
| DE10394240T5 (en) | 2010-04-29 |
| WO2005029684A1 (en) | 2005-03-31 |
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Granted publication date: 20090325 |