CN2594503Y - Magnetofluid bearing radiating fans - Google Patents
Magnetofluid bearing radiating fans Download PDFInfo
- Publication number
- CN2594503Y CN2594503Y CN 03228086 CN03228086U CN2594503Y CN 2594503 Y CN2594503 Y CN 2594503Y CN 03228086 CN03228086 CN 03228086 CN 03228086 U CN03228086 U CN 03228086U CN 2594503 Y CN2594503 Y CN 2594503Y
- Authority
- CN
- China
- Prior art keywords
- axle center
- axle
- shaped groove
- magnet ring
- 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 - Fee Related
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Abstract
The utility model relates to a magnetic fluid bearing radiating fan, which comprises a rotor provided with fan blades and a shaft center, a fixing bracket provided with a bearing seat, a stator coil which is arranged on the outer circumference of the bearing seat and a circuit board. The utility model is characterized in that two shaft sleeves which can accommodate the shaft center are arranged in inner holes of the bearing seat, the middle part of the shaft center of the rotor is provided with a convex magnetic ring which is arranged between the two shaft sleeves, and magnetic fluid is filled among the shaft sleeves and the shaft center and in interspace around the magnetic ring. The utility model solves the technical problem of the dry friction of a bearing of a minitype radiating fan.
Description
Technical field:
The utility model is about fan, particularly about being used in the small-sized heat radiating fan on computer, the instrument.
Background technique:
Brushless small-sized DC fan because it is simple in structure, in light weight, volume is little, safe in utilization, so use as the heat radiation instrument in occasions such as computer, instruments widely.The axle center of present this small-sized heat radiating fan rotor is to be bearing on rolling bearing or the oil-impregnated bearing, though can be filled with lubricating grease in the rolling bearing, be filled with lubricant oil in the micropore of oil-impregnated bearing, the pivoting friction that they produced, still belong to dry friction, certain surface friction drag is arranged.Particularly use oil-impregnated bearing, surface friction drag is bigger, easily abrasion, life-span weak point.In addition, this dry friction also can produce different sound in the running, hinders the normal use of computer, instrument.
Summary of the invention:
The purpose of this utility model is to provide a kind of magnetic fluid bearing radiation fan, with the technical problem of the dry friction that solves the small-sized heat radiating fan bearing.
The technological scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of magnetic fluid bearing radiation fan comprises rotor, the fixed support with bearing support with flabellum and axle center, is positioned at stator coil and circuit board on the bearing support excircle, it is characterized in that: be provided with two axle sleeves that hold the axle center in the inner hole of bearing seat; The middle part, axle center of rotor is provided with the magnet ring of projection; This magnet ring is between two axle sleeves; Between axle sleeve and axle center and in the space around the magnet ring, be full of the liquid that is magnetic.
Above-mentioned magnetic fluid bearing radiation fan is characterized in that: this axle center is positioned on the outer circumferential face of magnet ring both sides and is respectively arranged with V-shaped groove.
Above-mentioned magnetic fluid bearing radiation fan is characterized in that: be respectively arranged with V-shaped groove on the inner peripheral surface of these two bearings.
Above-mentioned magnetic fluid bearing radiation fan is characterized in that: this axle center is positioned on the outer circumferential face of magnet ring both sides and on the inner peripheral surface of two axle sleeves and is respectively arranged with V-shaped groove, the V-shaped groove that the V-shaped groove on the above-mentioned axle center and corresponding shaft put towards opposite.
Advantage of the present utility model is as follows:
1. because the axle center is to be bearing on the magnetic liquid (magnetic liguids), so the friction in axle center when rotation is fluid friction, and its resistance is much smaller than dry friction, and can not produce different sound during running.
2. use magnet ring, magnetic liquid constrained between axle sleeve and the axle center and magnet ring around and can not leak, needn't use complicated leakage proof structure, kept the simple structure of original axle sleeve, outside the advantage easily manufactured, that cost is low, has the effect of liquid lubrication and supporting again.
3. there is not mechanical abrasion, long service life.
4. liquid supports vibration resistance.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is a mark A partial enlarged drawing among Fig. 1.
Fig. 3 is the V-shaped groove schematic representation on the axle center.
Fig. 4 is the V-shaped groove schematic representation on the axle sleeve.
Embodiment:
See also illustrated in figures 1 and 2.The utility model comprises the rotor 1 with flabellum 11 and axle center 14, the fixed support 2 with bearing support 21, stator coil 5 and circuit board 7.Flabellum 11 is arranged on the excircle of fan hub 13, and the rotor shell 12 that is fixed with rotor magnet 15 is arranged on the inner circumference of fan hub 13, and an end in axle center 14 is fixed on the central position of fan hub 13, thereby has constituted rotor 1.One end of bearing support 21 is fixed on the center of fixed support 2.Stator coil 5 and circuit board 7 are separately fixed on the outer circumferential face of bearing support 21, and wherein stator coil 5 is positioned at the space that rotor magnet 15 surrounds.In the endoporus 211 of bearing support 21, be provided with the axle sleeve 3 and 3 ' of two spaces.This axle sleeve 3 and 3 ' center are respectively arranged with the hole that holds axle center 14.These 14 middle parts, axle center are provided with the magnet ring 4 of projection, and this magnet ring 4 is positioned between two axle sleeves 3 and 3 ', and respectively with axle sleeve 3 and 3 ' and the endoporus 211 of bearing support 21 do not lean on mutually mutually, therefore around magnet ring 4, form certain space.Axle center 14 has certain space apart respectively and between the hole of two axle sleeves 3 and 3 ' too.Be full of the liquid 6 that is magnetic in the space of the space around the above-mentioned magnet ring 4 and axle center 14 and axle sleeve 3 and 3 ', the magnetic attraction effect of this magnetic liquid 6 and magnet ring 4 both can be flowed magnetic liquid 6, but can not leak from the two side ends of axle sleeve 3 and 3 '.Owing between axle center 14 and axle sleeve 3 and 3 ' fixed gap is arranged, when rotor 1 is static, under the effect of rotor 1 gravity, the bottom surface of axle center 14 sagging its bottom surfaces and axle sleeve 3 and 3 ' is mutually near forming an angle of wedge, be in magnetic liquid 6 in this angle of wedge in the axle center during 14 rotations, moved to space Xiao Chu (promptly to axle center 14 extreme lower positions) from the space general goal by axle center 14 surface drives, axle center 14 is held up in central siphon 3 and 3 ' central position, make to keep non-contact between them thereby produce pressure.The process that produces for this pressure of strengthening magnetic liquid 6, can be in the axle center 14 outer circumferential faces that are positioned at magnet ring 4 both sides, be respectively arranged with V-shaped groove 8 (referring to Fig. 3), also can on the inner peripheral surface of the hole of axle sleeve 3 and 3 ', be respectively arranged with V-shaped groove 8 ' (referring to Fig. 4).If axle center 14 and axle sleeve 3,3 ' are provided with V-shaped groove 8 simultaneously, 8 ' time, then V-shaped groove 8 with 8 ' towards opposite.When stator coil 5 energising generation field drives rotors 1 begin to rotate, magnetic liquid 6 is pushed to middle part D after two edge C of V-shaped groove 8 or 8 ' and E enter, thereby generation kinetic pressure, rotating speed is higher, kinetic pressure is also higher, when fan reaches rated speed, kinetic pressure greater than the vector of rotor 1 deadweight and wind pressure with, axle center 14 is not just directly contacted with 3 ' with axle sleeve 3 by unsettled picking-up, realizes friction of fluid lubrication.
Claims (4)
1, a kind of magnetic fluid bearing radiation fan, comprise rotor, fixed support, be positioned at stator coil and circuit board on the bearing support excircle, it is characterized in that: be provided with two axle sleeves that hold the axle center in the inner hole of bearing seat with bearing support with flabellum and axle center; The middle part, axle center of rotor is provided with the magnet ring of projection; This magnet ring is between two axle sleeves; Between axle sleeve and axle center and in the space around the magnet ring, be full of the liquid that is magnetic.
2, magnetic fluid bearing radiation fan according to claim 1 is characterized in that: this axle center is positioned on the outer circumferential face of magnet ring both sides and is respectively arranged with V-shaped groove.
3, magnetic fluid bearing radiation fan according to claim 1 is characterized in that: be respectively arranged with V-shaped groove on the inner peripheral surface of these two bearings.
4, magnetic fluid bearing radiation fan according to claim 1, it is characterized in that: this axle center is positioned on the outer circumferential face of magnet ring both sides and on the inner peripheral surface of two axle sleeves and is respectively arranged with V-shaped groove, the V-shaped groove that the V-shaped groove on the above-mentioned axle center and corresponding shaft put towards opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03228086 CN2594503Y (en) | 2003-01-10 | 2003-01-10 | Magnetofluid bearing radiating fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03228086 CN2594503Y (en) | 2003-01-10 | 2003-01-10 | Magnetofluid bearing radiating fans |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2594503Y true CN2594503Y (en) | 2003-12-24 |
Family
ID=33757119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03228086 Expired - Fee Related CN2594503Y (en) | 2003-01-10 | 2003-01-10 | Magnetofluid bearing radiating fans |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2594503Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035323A (en) * | 2010-10-10 | 2011-04-27 | 香港应用科技研究院有限公司 | Generator with magnetic fluid bearing |
| CN102162589A (en) * | 2011-02-07 | 2011-08-24 | 林智勇 | Magnetic fluid radiating led |
| CN103104551A (en) * | 2011-11-09 | 2013-05-15 | 奇鋐科技股份有限公司 | Fan structure with oil bearing |
| CN103104534A (en) * | 2011-11-09 | 2013-05-15 | 奇鋐科技股份有限公司 | Fan device provided with oil-retaining bearing |
| CN104912839A (en) * | 2015-06-10 | 2015-09-16 | 宁波生久散热科技有限公司 | Plastic bearing and cooling fan and process for making plastic bearing |
-
2003
- 2003-01-10 CN CN 03228086 patent/CN2594503Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035323A (en) * | 2010-10-10 | 2011-04-27 | 香港应用科技研究院有限公司 | Generator with magnetic fluid bearing |
| CN102035323B (en) * | 2010-10-10 | 2012-11-07 | 香港应用科技研究院有限公司 | Generator with magnetic fluid bearing |
| CN102162589A (en) * | 2011-02-07 | 2011-08-24 | 林智勇 | Magnetic fluid radiating led |
| CN103104551A (en) * | 2011-11-09 | 2013-05-15 | 奇鋐科技股份有限公司 | Fan structure with oil bearing |
| CN103104534A (en) * | 2011-11-09 | 2013-05-15 | 奇鋐科技股份有限公司 | Fan device provided with oil-retaining bearing |
| CN103104534B (en) * | 2011-11-09 | 2017-04-26 | 奇鋐科技股份有限公司 | Fan device provided with oil-retaining bearing |
| CN104912839A (en) * | 2015-06-10 | 2015-09-16 | 宁波生久散热科技有限公司 | Plastic bearing and cooling fan and process for making plastic bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |