CN100491754C - Magnetofluid bearing - Google Patents
Magnetofluid bearing Download PDFInfo
- Publication number
- CN100491754C CN100491754C CNB2007100292743A CN200710029274A CN100491754C CN 100491754 C CN100491754 C CN 100491754C CN B2007100292743 A CNB2007100292743 A CN B2007100292743A CN 200710029274 A CN200710029274 A CN 200710029274A CN 100491754 C CN100491754 C CN 100491754C
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- permanent magnet
- bearing
- magnetic fluid
- inner sleeve
- semi
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Abstract
The magnetic fluid bearing comprises a bearing internal sleeve with shoulder on one end, a bearing external sleeve, a permanent magnet, magnetic fluid and an internal sleeve fixing ring. The permanent magnet is in hooped-column shape and is formed by two half hooped-column shape permanent magnets which are opposite each other and with contrary magnetic pole and separated by a separation piece. The bearing external sleeve is fixedly mounted on the ex-circle of the hooped-column shape permanent magnet, and the bearing internal sleeve is fixedly mounted on the inner circle of the permanent magnet by the internal sleeve fixing ring. Between the permanent magnet and the bearing internal sleeve there is provided with clearance in which the said magnetic fluid is provided. Advantages: good lubrication effect, strong sealing performance, no dry friction and impaction in rotation, stable operation and very low sound, suitable especially to high rotation speed and environment with dust.
Description
Technical field
The present invention relates to a kind of with the magnetic fluid bearing of magnetic fluid as oiling agent.
Background technique
Magnetic fluid is that superfine magnetic-particle (or particle of magnetizable) is coated in surfactant or the dispersion, is mixed in the light mineral oil, and the diameter of these particles and disperses in light mineral matter carrier usually between 3～15 microns.Magnetic-particle is usually by surfactant or dispersant-coated, and surfactant or dispersing agent can make and keep certain distance overcoming Fan Dewalesili and magnetic interaction power (attraction force) between the magnetic-particle, thereby make magnetic fluid that good sliding be arranged.The general isoparaffin class dispersing agent that uses can be realized 0.0008～0.002 static friction coefficient, and viscosity is starkly lower than 2cp～6cp.Because this character of magnetic fluid, so available it be used for sliding bearing as oiling agent, as Chinese patent notification number CN2607467Y, January 30 2002 day for announcing, disclosed " magnetic fluid lubrication sliding bearing ", because of magnetic fluid is forming round section joint ring under the effect in magnetic field between bearing inner sleeve and axle, make and dry friction can not occur between bearing inner sleeve and the axle, and under the action of a magnetic field of strong magnet, magnetic fluid can not produce leakage yet, therefore can not make extraneous dirt enter into the bearing play, compare that its performance of plain bearing is better, longer service life.But, bearing has more structural defectives: annular spacer ring is combined forms by n-1 with the n annular permanent magnet in the bearing inner sleeve outer ring for it, its magnetic fluid is evenly not distribute between axle and bearing inner sleeve after the bearing assembling is finished, but having formed round section joint ring separately, this can influence the performance of bearing to a certain extent; In addition, this bearing the time just injects magnetic fluid in assembling, and this reprocessing of machine of giving the assembling of bearing and this bearing being housed is made troubles.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, provides a kind of performance magnetic fluid bearing better, easy to assembly.
The technical solution adopted in the present invention is: the present invention includes the bearing inner sleeve that an end has convex shoulder, permanent magnet, magnetic fluid, interior cover is ring body fixedly, described permanent magnet is the central column permanent magnet that is separated to form with shim by two opposite semi-ring column permanent magnets of opposing side magnetic pole, described shim width less than permanent magnet on radial width makes two semi-ring column permanent magnets form the space at inner circle, ring body is fixedly installed in circle in the described permanent magnet to described bearing inner sleeve by overlapping fixedly in described, be provided with the gap between described permanent magnet and the described bearing inner sleeve, described magnetic fluid is arranged in the described gap.
The present invention also comprises bearing outside, described bearing outside is fixedly installed in described central column permanent magnet cylindrical, described shim length less than permanent magnet on axial length makes two semi-ring column permanent magnets form the space at least one end, corresponds to two semi-ring column permanent magnets at described bearing outside and is provided with the magnetic fluid hand-hole in the gap of axle head.
Described magnetic fluid is made up of light mineral oil, straight iron powder and isoparaffin class dispersing agent, described bearing inner sleeve, described bearing outside, described interior cover fixedly ring body, described shim are made by non-magnet material, and described non-magnet material is stainless steel or bronze or phosphor bronze or brass.
The invention has the beneficial effects as follows: because the central column permanent magnet that permanent magnet of the present invention is separated to form with shim by two opposite semi-ring column permanent magnets of opposing side magnetic pole, bearing inner sleeve by interior cover fixedly ring body be fixedly installed in the described permanent magnet circle, be provided with the gap between described permanent magnet and the described bearing inner sleeve, described magnetic fluid is arranged in the described gap, under the effect of described permanent magnet, magnetic fluid forms the central column lubricating layer that is uniformly distributed in the described gap, the lubricating layer of central column is better than the lubrication effect and the sealing effect of aforementioned round section joint ring separately, so performance of the present invention is better, the life-span is longer; Be present in the bearing owing to the present invention's magnetic fluid when completing again, and not be used in the magnetic fluid that reinjects when assembling, so bearing is easy to assembly; Because the present invention also is installed with bearing outside at the cylindrical of permanent magnet, bearing outside plays shielding action for permanent magnet, the magnetic of permanent magnet is greatly enhanced, so greasy property, sealability and the bearing capacity of magnetic fluid are greatly improved, and the size that the present invention also is easy to bearing outside and bearing inner sleeve are applied mechanically existing bearing standard makes, and makes magnetic fluid bearing can realize standardized production.The present invention has realized the fluid sliding friction, no dry friction, frictional force is minimum, and high lubricating effect, sealability are strong, therefore in rotation, do not have impact, steady, noiseless or minimum sound is arranged, be specially adapted to high rotating speed and the environment of dust arranged.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a horizontal section schematic representation of the present invention;
Fig. 3 is the section rotation schematic representation of A-A among Fig. 2.
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, the present invention includes an end and have the bearing inner sleeve 1 of convex shoulder, bearing outside 2, permanent magnet, magnetic fluid, interior cover is ring body 7 fixedly, described permanent magnet is by two semi-ring column permanent magnets 3 that the opposing side magnetic pole is opposite, the central column permanent magnet that 4 usefulness shims 5 are separated to form, described bearing outside 2 is fixedly installed in described central column permanent magnet cylindrical, described shim 5 width less than permanent magnet on radial width makes two semi-ring column permanent magnets 3 and 4 form the space at inner circle, described shim 5 length less than permanent magnet on axial length makes two semi-ring column permanent magnets 3,4 in formation space, two ends, correspond to two semi-ring column permanent magnets 3 at described bearing outside 2,4 are provided with magnetic fluid hand-hole 8 in the gap of axle head, ring body 7 is fixedly installed in circle in the described permanent magnet to described bearing inner sleeve 1 by overlapping fixedly in described, be provided with the gap between described permanent magnet and the described bearing inner sleeve 1, the big I of this gap decides according to the design bearing capacity of bearing, described magnetic fluid is injected into this gap from described hand-hole 8, and magnetic fluid forms the central column lubricating layer 6 that is uniformly distributed in the described gap under the effect of permanent magnet.
Described permanent magnet adopts the ferromagnetic material that strong magnetic factory produces on the market to process.Described magnetic fluid is made up of light mineral oil, straight iron powder and isoparaffin class dispersing agent.Described bearing inner sleeve 1, described bearing outside 2, described interior cover fixedly ring body 7, described shim 5 are made by non-magnet material (magnetic shielding material), are selected from stainless steel, bronze, phosphor bronze, brass and some other non-magnet materials.
Use of the present invention and plain bearing are similar, its bearing inner sleeve 1 and a transmission shaft are fixedly connected, bearing outside 2 is fixedly connected with corresponding bearing support, and under the lubrication that is in the lubricating layer 6 between permanent magnet and the bearing inner sleeve 1, bearing inner sleeve 1 and bearing outside 2 relatively rotate.High lubricating effect, sealability are strong because magnetic fluid has, no dry friction, do not have impact, steady, noiseless or minimum sound is arranged in therefore rotating, and be specially adapted to high rotating speed and the environment of dust is arranged.
Claims (4)
1, a kind of magnetic fluid bearing, comprise that an end has the bearing inner sleeve of convex shoulder (1), be installed on the permanent magnet of bearing inner sleeve (1) cylindrical, magnetic fluid, interior cover is ring body (7) fixedly, it is characterized in that: described permanent magnet is by two semi-ring column permanent magnets (3 that the opposing side magnetic pole is opposite, 4) the central column permanent magnet that is separated to form with shim (5), described shim (5) width less than permanent magnet on radial width makes two semi-ring column permanent magnets (3,4) form the space at inner circle, ring body (7) is fixedly installed in circle in the described permanent magnet to described bearing inner sleeve (1) by overlapping fixedly in described, be provided with the gap between described permanent magnet and the described bearing inner sleeve (1), described magnetic fluid is arranged in the described gap.
2, magnetic fluid bearing according to claim 1, it is characterized in that: it also comprises bearing outside (2), described bearing outside (2) is fixedly installed in described central column permanent magnet cylindrical, described shim (5) length less than permanent magnet on axial length makes two semi-ring column permanent magnets (3,4) form the space at least one end, corresponds to two semi-ring column permanent magnets (3,4) at described bearing outside (2) and is provided with magnetic fluid hand-hole (8) in the gap of axle head.
3, magnetic fluid bearing according to claim 2, it is characterized in that: described magnetic fluid is made up of light mineral oil, straight iron powder and isoparaffin class dispersing agent, described bearing outside (2) is made by non-magnet material, and described non-magnet material is stainless steel or bronze or phosphor bronze or brass.
4, magnetic fluid bearing according to claim 1 and 2, it is characterized in that: described magnetic fluid is made up of light mineral oil, straight iron powder and isoparaffin class dispersing agent, described bearing inner sleeve (1), described interior cover fixedly ring body (7), described shim (5) are made by non-magnet material, and described non-magnet material is stainless steel or bronze or phosphor bronze or brass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100292743A CN100491754C (en) | 2007-07-20 | 2007-07-20 | Magnetofluid bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100292743A CN100491754C (en) | 2007-07-20 | 2007-07-20 | Magnetofluid bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101135342A CN101135342A (en) | 2008-03-05 |
| CN100491754C true CN100491754C (en) | 2009-05-27 |
Family
ID=39159597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100292743A Expired - Fee Related CN100491754C (en) | 2007-07-20 | 2007-07-20 | Magnetofluid bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100491754C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936273A (en) * | 2010-07-08 | 2011-01-05 | 伍劲刚 | Domestic power source device of solar energy |
| CN102278371A (en) * | 2011-07-18 | 2011-12-14 | 浙江大学 | magnetic rolling bearing |
| CN103094171B (en) * | 2011-10-27 | 2015-06-17 | 沈阳芯源微电子设备有限公司 | Magnetic levitation wafer rotary system |
| CN103195816A (en) * | 2013-04-10 | 2013-07-10 | 青岛理工大学 | Magnetic fluid lubricating sliding bearing with annular groove |
| CN103398100B (en) * | 2013-08-08 | 2015-12-02 | 太原科技大学 | Magnetic fluid filmatic bearing |
| CN103912582B (en) * | 2014-02-14 | 2016-02-17 | 浙江大学 | The magnetic fluid bearing of adjustable magnetic fluid lubrication fluid viscosity |
| CN105545967A (en) * | 2016-02-17 | 2016-05-04 | 张广 | Self-aligning roller bearing combining displacement compensation function and vibration reduction function |
| CN105840657B (en) * | 2016-05-24 | 2019-04-19 | 上海交通大学 | A kind of method intelligence controllable bearing and control rotor oscillation |
| CN108180222A (en) * | 2017-12-29 | 2018-06-19 | 上海应用技术大学 | Magnetic fluid sliding bearing |
| CN109236857B (en) * | 2018-09-17 | 2020-03-20 | 常州大学 | Self-adaptive high-speed anti-friction suspension bearing |
| NL2023974B1 (en) | 2019-10-07 | 2021-06-01 | Bifroest Res And Development B V | Self-healing bearing device using electric or magnetic fluids |
-
2007
- 2007-07-20 CN CNB2007100292743A patent/CN100491754C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101135342A (en) | 2008-03-05 |
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Granted publication date: 20090527 Termination date: 20140720 |
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