CN101328910A - Cooling fan - Google Patents
Cooling fan Download PDFInfo
- Publication number
- CN101328910A CN101328910A CNA2007100751941A CN200710075194A CN101328910A CN 101328910 A CN101328910 A CN 101328910A CN A2007100751941 A CNA2007100751941 A CN A2007100751941A CN 200710075194 A CN200710075194 A CN 200710075194A CN 101328910 A CN101328910 A CN 101328910A
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- Prior art keywords
- rotating shaft
- bearing
- axle bed
- absorption member
- magnetic absorption
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Abstract
The invention relates to a radiation fan, which comprises a fan frame, a rotor member, a stator member and a bearing system; an axle bed protrudes and is arranged on the central of the fan frame; the bearing system comprises a bearing and a magnetic attraction piece; the bearing is received inside the axle bed; the rotor member is provided with a rotating shaft which is sleeved in the inside of the bearing; the stator member is sleeved on the outer edge of the axial bed; the bottom end of the rotating shaft is sunken inwards from the outer surface to form a groove; a part of the magnetic attraction piece just faces to an upper half section of the groove and is annularly arranged on the periphery of the rotating shaft; the top surface of the magnetic attraction piece is positioned above the upper part of the top of the groove; and an annular space is formed between the magnetic attraction piece and the rotating shaft. The radiation fan utilizes a magnetic attraction force of the magnetic attraction piece to continuously attract the rotating shaft and maintain the rotating balance of the rotor member.
Description
Technical field
The present invention relates to a kind of radiation fan, refer to that especially a kind of rotor can keep the radiation fan of balanced rotation.
Background technique
Existing radiation fan generally comprises a stator and is located on the rotor that this stator is peripheral and but relative stator is rotated, this rotor comprises a wheel hub, from the vertically extending rotating shaft of wheel hub and be located on some flabellums of wheel hub periphery, these stator central authorities are provided with a bearing, and the rotating shaft of rotor is contained in location in this bearing.During this radiation fan work, rotor is made high speed rotary motion with respect to stator, when rotating, flabellum produces air-flow, and air-flow produces the upwards active force of drawing to this flabellum and rotor, thereby have axial oscillation, wild effect when causing the rotating shaft high speed rotating of rotor, cause the increase of noise in operating amount simultaneously.
At present, those skilled in the art mainly are by import the reinforcement positioning design of rotor in cooling fan structure, to reach the requirement of keeping the rotor rotation balance.As No. the 02201250.8th, C China patent, establish a laminar magnet in the end of rotating shaft, the end face of this magnet and the end of rotating shaft lean, and to support this rotating shaft rotatably, produce axial magnetic suction simultaneously and attract rotating shaft to stablize rotor.Yet, the end of this rotating shaft directly is resisted against on the end face of magnet, and the material of general magnet is not wear-resistant, therefore the rotating shaft running was used after a period of time, to cause the end face of magnet to produce depression, rotor will be lost the precision when assembling thereupon downward off normal like this, and then have influence on the normal state of fan work, keep the requirement of rotor rotation balance, the working life of having reduced fan with can not reaching continuous and effective.
Summary of the invention
In view of this, be necessary to provide a kind of radiation fan that can keep to continuous and effective the rotor rotation balance.
A kind of radiation fan, comprise a fan frame, one rotor component, an one stator member and a bearing arrangement, the central projection of this fan frame is established and is formed an axle bed, this bearing arrangement comprises a bearing and a magnetic absorption member, this bearing is contained in this axle bed, this rotor component has a rotating shaft that wears this bearing inside, this stator component is sheathed on the outer rim of axle bed, the bottom of this rotating shaft caves inward from outer surface and forms a groove, the upper semisection of this magnetic absorption member part alignment cavities and be located on the rotating shaft periphery, its end face is positioned at the top on groove top, forms an annular space between magnetic absorption member and rotating shaft.
The end face of the magnetic absorption member of this radiation fan is positioned at the top on groove top, and form annular space between this magnetic absorption member and the rotating shaft, make magnetic absorption member produce a downward magnetic attraction to continue to attract rotating shaft downwards to the rotating shaft of groove upper section, again because this magnetic absorption member is sheathed on the rotating shaft periphery, can not wear and tear because of the rotation of rotating shaft, the sustainable rotor component balanced rotation of keeping effectively makes radiation fan have the more long life.
Description of drawings
Fig. 1 is the perspective exploded view of radiation fan.
Fig. 2 is the ssembly drawing of Fig. 1.
Fig. 3 is the generalized section of Fig. 2 along the III-III line.
Fig. 4 is the enlarged diagram of magnetic absorption member among Fig. 1.
Fig. 5 is installed on the plan view in the axle bed of radiation fan for magnetic absorption member.
Fig. 6 is another embodiment's of magnetic absorption member a schematic representation.
Embodiment
See also Fig. 1 and Fig. 2, this radiation fan comprises a fan frame 30, a bearing arrangement 60, a rotor component 10 and a stator member 20, and this rotor component 10 is located at the periphery of this stator component 20, and rotor component 10 and stator component 20 all are contained in the fan frame 30.
See also Fig. 3, fan frame 30 comprises a bottom 32 and an axle bed 34, and this axle bed 34 is dashed forward from bottom 32 mediads of fan frame 30 and established formation.The open-topped of axle bed 34, its central authorities form a containing space 36.The inner circumference place on these axle bed 34 tops forms a ring-shaped depression 38, and this ring-shaped depression 38 is connected with containing space 36.The bottom of this axle bed 34 is to projecting inward formation one step 31 (ginseng Fig. 3).
Stator component is 20 sheathed, be installed in axle bed 34 outer rims, this stator component 20 comprises a circuit board 26, be fixed on the circuit board 26 by folded upper and lower insulating trip 28a, the 28b that establishes an armature 22 that forms and cover at armature two ends about in the of 22 respectively of several layers silicon steel plate.Twine coiling 24 on the armature 22 in order to produce the magnetic field of alternate, this coiling 24 electrically connects with circuit board 26, and insulating trip 28a, 28b can avoid armature 22 electrically to contact with coiling 24.
Please in the lump with reference to Fig. 1, bearing arrangement 60 is installed in its containing space 36 by the open top end of axle bed 34, comprises a bearing 61, a magnetic absorption member 62, a clasp 63, a wear plate 67 and a flinger ring 68.The center of flinger ring 68 is a perforation 680, and flinger ring 68 is contained in ring-shaped depression 38 places on axle bed 34 tops, and the diameter at ring-shaped depression 38 places on the size of its external diameter and axle bed 34 tops big or small roughly the same sealed the opening on these axle bed 34 tops just.The top end surface of bearing 61 is lower than the open top end of axle bed 34, thus between its top end surface and the flinger ring 68 at intervals, described bearing 61, flinger ring 68 forms oil storage space 50 (ginseng Fig. 3) with axle bed 34 common qualifications.The inside of bearing 61 forms an axial hole 610, the flinger ring 68 on axle bed 34 tops is passed in rotating shaft 18, be contained in this axial hole 610, the depression 180 on rotating shaft 18 tops 185 and is connected with oil storage space 50 between the top end surface and flinger ring 68 of bearing 61.The diameter of the perforation 680 at flinger ring 68 centers is a bit larger tham the external diameter of rotating shaft 18, makes between rotating shaft 18 and the flinger ring 68 to form a gap, produces friction to avoid directly contacting between flinger ring 68 and the rotating shaft 18.The internal diameter of intermediate portions is greater than the internal diameter of its two end portions in the bearing 61, and promptly the diameter of axial hole 610 intermediate portions is greater than the diameter of its two end portions, thus between bearing 61 intermediate portions and rotating shaft 18 the long and narrow space 70 of formation one.Packing lubrication oil in this space 70, can increase the total capacity of lubricant oil on the one hand, on the other hand, space 70 makes bearing 61 only two terminal contact with rotating shaft 18, thereby reduced the area of contact between bearing 61 and the rotating shaft 18, reduce friction between the two, make the effect of bearing 61 be similar to two ball bearings.The outer surface of bearing 61 is formed with some grooves 613 for the lubricant oil backflow, arbitrary groove 613 radially extends to external peripheral surface from the axial hole 610 of bearing 61 top end surfaces, after running through this external peripheral surface vertically, continuation is radially extended internally by external peripheral surface, points to axial hole 610 places of bearing 61 bottom end surfaces.Clasp 63 is located on the step 31 in the axle bed 34, and its central authorities form central through bore 630, can pass and is sheathed on groove 184 places of rotating shaft 18 for the bottom 186 of rotating shaft 18, and clasp 63 axially breaks away from fan frame 30 with groove 184 actings in conjunction restriction rotating shaft 18 along it.Wear plate 67 is made by the good material of wear-resisting property, is arranged at the bottom of the containing space 36 of axle bed 34, and is inconsistent with the bottom 186 of rotating shaft 18, to support rotating shaft 18 rotatably.
In fact, magnetic absorption member 62 can be the columnar magnet of arbitrary polygon, be illustrated in figure 6 as another embodiment of the present invention, this magnetic absorption member 62a is a pentagon, five jiaos all form a circular arc chamfering 624a, central authorities form a manhole 620a, to be positioned at step 31 roughly the same with the diameter on top for containing spaces 36 in the diameter of this circular arc chamfering 624a and the axle bed 34, by these five circular arc chamfering 624a respectively with the contacted inner surfaces of axle bed 34 by and this magnetic absorption member 62a firmly is installed in the axle bed 34.Understandable, this magnetic absorption member 62 can also be common cylindric or other difform columnar magnet.
The end face of magnetic absorption member 62 contacts with the upper surface of clasp 63 with the bottom of bearing 61 respectively with the bottom surface, axial hole 610 in its manhole 620 and the bearing 61 is connected, being contained in axial hole 610 interior rotating shafts 18 continues to extend downwards and be contained in the manhole 620, the upper semisection of this magnetic absorption member 62 is sheathed on the periphery of the rotating shaft 18 of groove 184 head portions, and a peripheral slight distance at interval with this part rotating shaft 18, the upper semisection of lower semisection alignment cavities 184 and be located on the periphery of the rotating shaft 18 of groove 184 parts forms an annular space between the outer surface of the internal surface of magnetic absorption member 62 alignment cavities 184 parts and groove 184.
During concrete enforcement, the thickness of magnetic absorption member 62 can change according to the variation of groove 184 height, need to guarantee that the bottom surface of magnetic absorption member 62 is positioned at the top of highly half of groove 184, and its end face is positioned at the top on groove 184 tops, thereby make magnetic absorption member 62 part alignment cavities 184 and be located in the rotating shaft 18 formation one annular space between the outer surface of magnetic absorption member 62 internal surfaces and rotating shaft 18.The bottom surface of this magnetic absorption member 62 is positioned at the top of highly half of groove 184, and the part that can avoid being positioned at groove 184 belows on magnetic absorption member 62 countershafts 18 produces magnetic attraction upwards, thereby avoids the part or all of counteracting of magnetic absorption member 62 countershafts 18 downward magnetic attractions.
During this fan work, drive rotor 10 rotations by stator component 20 and 10 magnetic field of rotor component interaction effect.In the process of rotating shaft 18 high speed rotating, because stopping through flinger ring 68, the lubricant oil that centrifugal action splashes out along rotating shaft 18 accumulates in oil storage space 50, and reflux, thereby guaranteed greasy property good between bearing 61 and the rotating shaft 18 along the gap 628 that forms between the side of the groove 613 of the outer surface of bearing 61 and magnetic absorption member 62 and the axle bed 34.And, magnetic absorption member 62 by and rotating shaft 18 between annular space form stronger magnetic attraction, level attracts these groove 184 upper semisections to be coated on rotating shaft 18 parts in the magnetic absorption member 62, it is rotated freely in groove 184, simultaneously, be tilted to down and attract these groove 184 tops to be coated on rotating shaft 18 parts of magnetic absorption member 62 upper semisections, forming a downward magnetic attraction attracts rotating shaft 18 drop-down, when preventing that rotating shaft 18 from rotating since centrifugal action move up and off normal, on the other hand, when being sheathed on rotating shaft 18 peripheral, this magnetic absorption member 62 can not wear and tear because of the rotation of rotating shaft 18, thereby sustainablely attract rotating shaft 18 effectively, keep rotor component 20 and continue balanced rotation, reduce the axial float influence that air-flow causes when running up the reaction force of flabellum 14 and rotor component 20 gravity own, make the Hall unit (Hall sensor) of installation on the circuit board 26 and the distance between the magnet ring 16 remain relative fixed, and then the permanent-magnetic field that Hall unit all the time can inductive magnetic ring 16 is changed, the integral body of keeping fan runs well.
Claims (10)
1. radiation fan, comprise a fan frame, one rotor component, an one stator member and a bearing arrangement, the central projection of this fan frame is established and is formed an axle bed, this bearing arrangement comprises a bearing and a magnetic absorption member, this bearing is contained in this axle bed, this rotor component has a rotating shaft that wears this bearing inside, this stator component is sheathed on the outer rim of axle bed, it is characterized in that: the bottom of this rotating shaft caves inward from outer surface and forms a groove, the upper semisection of this magnetic absorption member part alignment cavities and be located on the rotating shaft periphery, its end face is positioned at the top on groove top, forms an annular space between magnetic absorption member and rotating shaft.
2. radiation fan as claimed in claim 1 is characterized in that: the upper semisection of this magnetic absorption member is sheathed on the periphery that rotating shaft is positioned at the groove top, and lower semisection and groove align.
3. radiation fan as claimed in claim 1, it is characterized in that: this magnetic absorption member is polygonal columnar magnet, the joint of adjacent two edges forms circular arc chamfering respectively, and this circular arc chamfering leans on the contacted inner surfaces of axle bed respectively, forms the gap between the internal surface of each limit and axle bed respectively.
4. radiation fan as claimed in claim 3 is characterized in that: the diameter of this circular arc chamfering is identical with the internal diameter of axle bed.
5. radiation fan as claimed in claim 3 is characterized in that: this magnetic absorption member is quadrilateral or pentagon.
6. radiation fan as claimed in claim 3 is characterized in that: the outer surface of this bearing is formed with some grooves, and described groove is connected with the gap in the magnetic absorption member outside.
7. radiation fan as claimed in claim 1 is characterized in that: to projecting inward formation one step, this magnetic absorption member is between this step and bearing in this axle bed.
8. radiation fan as claimed in claim 1, it is characterized in that: the inwall place on the top of this axle bed forms a ring-shaped depression, this bearing arrangement comprises that also one is contained in the flinger ring in this ring-shaped depression, the common reserve that forms of described flinger ring, bearing and axle bed.
9. radiation fan as claimed in claim 8 is characterized in that: the outer surface of the corresponding reserve of this rotating shaft caves inward and forms the depression of an annular, and this depression is connected between flinger ring and bearing and with reserve.
10. radiation fan as claimed in claim 1 is characterized in that: the bottom surface of this magnetic absorption member is positioned at half place of this groove axial height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100751941A CN100552238C (en) | 2007-06-22 | 2007-06-22 | Radiation fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100751941A CN100552238C (en) | 2007-06-22 | 2007-06-22 | Radiation fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101328910A true CN101328910A (en) | 2008-12-24 |
| CN100552238C CN100552238C (en) | 2009-10-21 |
Family
ID=40204871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100751941A Active CN100552238C (en) | 2007-06-22 | 2007-06-22 | Radiation fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100552238C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI394896B (en) * | 2009-09-21 | 2013-05-01 | ||
| CN103429289A (en) * | 2011-02-25 | 2013-12-04 | 雷斯梅德电动科技有限公司 | Blower and pap system |
| CN103867461A (en) * | 2012-12-12 | 2014-06-18 | 富瑞精密组件（昆山）有限公司 | Cooling fan |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2491634Y (en) * | 2001-07-12 | 2002-05-15 | 世镒科技股份有限公司 | Radiating fan |
| CN2492694Y (en) * | 2001-08-03 | 2002-05-22 | 协禧电机股份有限公司 | Oil keeper for fan motor bearing |
| CN2519860Y (en) * | 2002-01-10 | 2002-11-06 | 元山科技工业股份有限公司 | Fan for radiation |
| JP2007037365A (en) * | 2005-07-29 | 2007-02-08 | Nippon Densan Corp | Motor |
-
2007
- 2007-06-22 CN CNB2007100751941A patent/CN100552238C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI394896B (en) * | 2009-09-21 | 2013-05-01 | ||
| CN103429289A (en) * | 2011-02-25 | 2013-12-04 | 雷斯梅德电动科技有限公司 | Blower and pap system |
| EP2678064A4 (en) * | 2011-02-25 | 2016-01-27 | Resmed Motor Technologies Inc | Blower and pap system |
| CN103429289B (en) * | 2011-02-25 | 2016-08-31 | 瑞思迈发动机及马达技术股份有限公司 | Aerator and PAP system |
| US10201675B2 (en) | 2011-02-25 | 2019-02-12 | Resmed Motor Technologies Inc. | Blower and PAP system |
| CN103867461A (en) * | 2012-12-12 | 2014-06-18 | 富瑞精密组件（昆山）有限公司 | Cooling fan |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100552238C (en) | 2009-10-21 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20170421 Address after: Guangdong, Chancheng Province West Industrial Zone, 35 North Road, Warburg, No. Patentee after: Quanyida Technology (Foshan) Co., Ltd. Address before: 518109 Guangdong city of Shenzhen province Baoan District Longhua Town Industrial Zone tabulaeformis tenth East Ring Road No. 2 two Co-patentee before: Foxconn Precision Industry Co., Ltd. Patentee before: Fuhuai (Shenzheng) Precision Industry Co., Ltd. |
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| TR01 | Transfer of patent right |