CN2472006Y - Magnet rheological fluid damper for rotor system oscilation control - Google Patents
Magnet rheological fluid damper for rotor system oscilation control Download PDFInfo
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- CN2472006Y CN2472006Y CN 01215379 CN01215379U CN2472006Y CN 2472006 Y CN2472006 Y CN 2472006Y CN 01215379 CN01215379 CN 01215379 CN 01215379 U CN01215379 U CN 01215379U CN 2472006 Y CN2472006 Y CN 2472006Y
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- displacement disc
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- stationary disk
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- Combined Devices Of Dampers And Springs (AREA)
Abstract
The utility model relates to a magnetic rheologic fluid damper for the control of the vibration of a rotor system, which comprises a movable disc, a stationary disc, a housing body and a rotor supporting sleeve, wherein a bearing for rotating a mechanical rotor is fixed in the rotor supporting sleeve, and an elastic supporting structure is formed between the rotor supporting sleeve and the housing body. Magnetic rheologic fluid is fixed in a gap between the movable disc and the stationary disc, and a coil is fixed in the housing body. The position of the coil enables a magnetic field generated by an energized coil to act on the magnetic rheologic fluid. The utility model can adopt a low-voltage power supply, and the requirement of the insulation property of the damper is decreased; moreover, the utility model has the advantage of insensitivity for pollution.
Description
The utility model relates to a kind of magnetic rheological liquid damper.
Current liquescent damper and magnetic rheological liquid damper are to utilize under extra electric field effect electrorheological fluid or magnetic flow liquid can be made rapidly, the characteristic of controllable variations and the novel vibrating control unit made.In recent years, existing people develops the current liquescent damper that is used to control the rotary machine rotor vibration, does not see as yet and delivers but the research magnetic rheological liquid damper is used for the document of rotor oscillation control.The existing current liquescent damper that is used to control rotor oscillation mainly is made up of displacement disc, stationary disk, housing, rotor bearing cover and electrorheological fluid.Displacement disc is fixed in rotor bearing and puts, and stationary disk is fixed in the housing, and is relative with displacement disc and leave certain clearance.Rotor bearing cover internal fixation has the bearing of rotary machine rotor.Between rotor bearing cover and the housing is elastic support structure, is used for providing the centering yielding support to rotor.Under the acting in conjunction of bearing and elastic support structure, the rotor bearing cover can only not rotate with rotor eddy.Electrorheological fluid is filled in the gap between displacement disc and the stationary disk.The basic functional principle of this current liquescent damper, be to be applied to high voltage on displacement disc and the stationary disk by control, that is act on electric field strength on the electrorheological fluid, control the viscosity of electrorheological fluid, thereby control and the whirling motion damping that the rotor bearing that displacement disc is fixed together overlaps are controlled the amplitude of rotor.This shows that this current liquescent damper must adopt high-voltage power, insulating property are required very high, and to the pollutant sensitivity, the property that has therefore that Keep Clear-High Voltage, the practical application difficulty is big.The reference of relevant current liquescent damper can be rolled up 265～268 pages of the 3rd phases referring to " aviation power journal " in 1996 the 11st, the research paper that is entitled as " experimental research that electro-rheological fluid damper is used for rotor oscillation control ", perhaps " Trans.ASME.J.of Vibrationand Acoustics " (one vibration and acoustics magazine of American Society of Mechanical Engineers's proceedings), nineteen ninety the 112nd is rolled up 440～443 pages of the 4th phases, is entitled as the research paper of " An electroviscous damper for rotorapplications " (a kind of current liquescent damper that is used for rotor).
The purpose of this utility model provides a kind of magnetic flow change liquid damper for control of rotary machinery rotor vibration that need not high-voltage power.
The utility model is achieved in that magnetic rheological liquid damper comprises displacement disc, stationary disk, housing and rotor bearing cover.Displacement disc is fixed in rotor bearing and puts, and stationary disk is fixed in the housing, and is relative with displacement disc and leave certain clearance.Rotor bearing cover internal fixation has the bearing of rotary machine rotor.Between rotor bearing cover and the housing is elastic support structure.Be filled with magnetic flow liquid in the gap between displacement disc and stationary disk.At the housing internal fixation coil is arranged, the position of coil can make the action of a magnetic field of hot-wire coil generation on magnetic flow liquid.Working principle of the present utility model is as follows: make coil electricity produce magnetic field, the action of a magnetic field is on magnetic flow liquid.According to the in good time controlling magnetic field intensity of the rotating speed of rotor, the viscosity that makes magnetic flow liquid changes with the variation of magnetic intensity.The whirling motion damping of the rotor bearing cover that is fixed together with regard to may command and displacement disc like this, thus the amplitude that is bearing in the rotor that rotor bearing puts is controlled.Because the utility model is controlled the whirling motion damping that rotor bearing overlaps by control electric current [strength, need not to produce electric field with high-tension electricity, therefore can adopt low tension power supply, reduced the requirement of damper to insulating property.
The utility model has the advantages that: 1. owing to adopted magnetic flow liquid, therefore compare with the existing current liquescent damper that is used to control rotor oscillation, the damping force of generation is bigger, and insensitive to polluting.2. owing to can adopt low tension power supply, so control gear is simple, safety.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a structure principle chart of the present utility model:
Fig. 2 is a specific embodiment of the present utility model:
Fig. 3 is the datagram that the utility model is experimentized and obtains.
Referring to Fig. 1, rotor oscillation control comprises displacement disc 1, stationary disk 2, housing 3 and rotor bearing cover 4 with magnetic rheological liquid damper.Displacement disc 1 is fixed on the rotor bearing cover 4, and stationary disk 2 is fixed in the housing 3, and is relative with displacement disc 1 and leave certain clearance.Rotor bearing overlaps 4 internal fixation bearing.The rotor of rotating machinery is bearing on the rotor bearing cover 4 by bearing.Between rotor bearing cover 4 and the housing 3 is elastic support structure 6.Under the acting in conjunction of bearing 5 and elastic support structure 6, rotor bearing cover 4 can only not rotate with rotor eddy.In the gap of displacement disc 1 and stationary disk 2, be full of magnetic flow liquid 8.At housing 3 internal fixation coil 9 is arranged, the position of coil 9 can make the action of a magnetic field of hot-wire coil generation on magnetic flow liquid 8.Displacement disc 1 and stationary disk 2 are discoid among the figure, and when displacement disc 1 overlapped 4 whirling motions along with rotor bearing, the magnetic flow liquid between displacement disc 1 and stationary disk 2 was subjected to shear action, thereby produce shear resistance.Coil 9 is a cylindrical shape, is surrounded on the periphery of displacement disc 1 and stationary disk 2.According to the in good time control coil electric current of the rotating speed of rotor 7, that is controlling magnetic field intensity, can change the viscosity of magnetic flow liquid, thereby change shear resistance, that is changed the whirling motion damping of the rotor bearing cover 4 that is fixed together with displacement disc 1, finally play the effect of control rotor amplitude.
Fig. 2 is a specific embodiment of structure shown in Figure 1.This embodiment has three displacement discs 1 and two stationary disks 2, and distance between plates is 1.5mm, is full of magnetic flow liquid 8 in the gap.Stationary disk 2 is fixed by spacer ring 10, liner plate 11, steel bushing 12 and housing end plug 3a.Displacement disc 1 is fixed on the rotor bearing cover 4 by spacer ring 13,14 and positioning ring 15, baffle ring 16.Rotor bearing overlaps 4 internal fixation two bearings 5, fixing by spacer ring 17,18 and swivel nut 19.The rotor 7 of rotating machinery is bearing on the bearing 5 by axle sleeve 20.Axle sleeve 20 connects firmly rotation together by locking nut 21 (or using Cock screw) with rotor 7.Fixing between axle sleeve 20 and the bearing 5 by spacer ring 22,23 and nut 24.The elastic support structure that is made of elastic rod 26 and tie-plate 27 between rotor bearing cover 4 and the housing 3 connects, wherein an end of six roots of sensation outer shroud elastic rod and four interior ring resilience bars is connected with housing 3 and rotor bearing cover 4 respectively, and the other end is connected on the tie-plate 27 simultaneously.Elastic support structure also can adopt existing squirrel-cage elastic support, as long as the centering yielding support is provided can for bearing 5.When rotor 7 rotated, under the acting in conjunction of bearing 5 and elastic support structure, rotor bearing cover 4 did not rotate with rotor eddy.Displacement disc 1 is followed rotor bearing and is overlapped 4 whirling motions, and the magnetic flow liquid between stationary disk 2 and the housing 38 forms six relative shear surfaces.Coil rack 28 is fixed in the housing 3, is wound with coil 9 on it, and the termination of coil is caused outside the housing 3 by electric wire.Apply electric current to coil 9, can produce the magnetic field that acts on the magnetic flow liquid 8.Coil turn can be determined according to calculating, and should be able to guarantee that coil produces the viscosity that enough magnetic intensities are controlled magnetic flow liquid.The rubber ring 29 that is connected between rotor bearing cover 4 and the housing 3 plays the sealing magnetic flow liquid.Rubber ring 29 is pushed down by four steel loops 30, is fixed by nut 31, screw 32.
In order to make magnetic flow liquid be symmetry properties to the damping function of displacement disc 1 on all directions, displacement disc 1 of the present utility model, stationary disk 2, rotor bearing cover 4 and coil 9 are preferably and the coaxial bearing line of rotor.The magnetic field that this structure can make hot-wire coil produce acts on the magnetic flow liquid 8 as far as possible equably, and the damping function that displacement disc 1 is subjected to is symmetry properties on all directions.
Fig. 3 shows the experimental result that the embodiment to Fig. 2 carries out.Two curves that indicate 0A and 0.75A among the figure are respectively that the amplitude of the substantially horizontal of rotor-support-foundation system is with the change in rotational speed situation when applying 0A and two kinds of electric currents of 0.75A to magnetic rheological liquid damper.When electric current is 0A, critical speed of rotation is 1550r/min, and when electric current is 0.75A, when rotating speed is 1550r/min, amplitude has reduced about 50%, and the critical speed of rotation that amplitude maximum occurs also brings up to 2100r/min, promptly applies electric current and can reduce the amplitude of system at the critical speed of rotation place, and critical speed of rotation is raise.Utilize these characteristics, can adopt simple switch control that the amplitude of rotor-support-foundation system is controlled in whole working speed district, be to apply the 0.75A electric current behind the rotor startup earlier, at this moment respond amplitude-frequency response along 0.75A, after arriving the 1800r/min rotating speed, cut off the electricity supply, then respond amplitude-frequency response along 0A.Its characteristic can change at moment (in several milliseconds), thereby can not cause oscillatory response.The utility model and the control of the existing current liquescent damper rule of shaking is very similar.This experimental result shows: (1) the utility model is fine in the control at close-to-critical range and the critical speed of rotation place effect of shaking.The increase with externally-applied magnetic field intensity reduces at close-to-critical range and critical speed of rotation place to be bearing in rotor amplitude on the magnetic rheological liquid damper, then increases with the increase of magnetic intensity at supercritical region.(2) rigidity of magnetic rheological liquid damper was with once the adding and increased of the magnetic intensity that applies, and the critical speed of rotation that shows as system raises with the increase of magnetic intensity.(3) can pass through to select the magnetic flow liquid of function admirable, and select appropriate controlling schemes (as switch control) for use, make damper have best effectiveness in vibration suppression, thereby reach the purpose of controlling rotor oscillation in full working speed district.
Claims (3)
1. a vibration of rotor system is controlled and is used magnetic rheological liquid damper, comprise displacement disc, stationary disk, housing and rotor bearing cover, displacement disc is fixed in rotor bearing and puts, stationary disk is fixed in the housing, relative with displacement disc and leave certain clearance, rotor bearing cover internal fixation has the bearing of rotary machine rotor, between rotor bearing cover and the housing is elastic support structure, it is characterized in that: be filled with magnetic flow liquid in the gap between displacement disc and stationary disk, at the housing internal fixation coil is arranged, the position of coil can make the action of a magnetic field of hot-wire coil generation on magnetic flow liquid.
2. magnetic rheological liquid damper as claimed in claim 1 is characterized in that: displacement disc and stationary disk are discoid, and coil is a cylindrical shape, are surrounded on the periphery of displacement disc and stationary disk.
3. magnetic rheological liquid damper as claimed in claim 2 is characterized in that: displacement disc, stationary disk, rotor bearing cover and coil all with the coaxial bearing line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01215379 CN2472006Y (en) | 2001-02-28 | 2001-02-28 | Magnet rheological fluid damper for rotor system oscilation control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01215379 CN2472006Y (en) | 2001-02-28 | 2001-02-28 | Magnet rheological fluid damper for rotor system oscilation control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2472006Y true CN2472006Y (en) | 2002-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01215379 Expired - Fee Related CN2472006Y (en) | 2001-02-28 | 2001-02-28 | Magnet rheological fluid damper for rotor system oscilation control |
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| CN (1) | CN2472006Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392283C (en) * | 2004-10-08 | 2008-06-04 | 吕崇耀 | Method of realizing vibration absorption and non-contact type power transmission using magnetic rheological fluid |
| CN102758874A (en) * | 2012-07-17 | 2012-10-31 | 北京化工大学 | Self-adaptive variable-damping variable-stiffness shock absorber for multi-frequency component vibration of rotary machine rotator |
| CN105443857A (en) * | 2015-12-13 | 2016-03-30 | 北京化工大学 | Variable-damping vibration attenuation and noise reduction device for valve |
| CN105626755A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Small rotary type magneto-rheological fluid damper used for reproducing passive force sense |
| CN105626754A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Multi-fin rotary magneto-rheological fluid damper based on S-shaped magnetic circuit |
| CN108442555A (en) * | 2018-05-14 | 2018-08-24 | 西京学院 | A kind of half compound magnetic rheological liquid damper of active Self-resetting quality runner |
| CN109606532A (en) * | 2018-12-19 | 2019-04-12 | 哈尔滨工程大学 | Fluid drag-reduction noise reduction intelligent skin structure based on magnetorheological elastic material |
-
2001
- 2001-02-28 CN CN 01215379 patent/CN2472006Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392283C (en) * | 2004-10-08 | 2008-06-04 | 吕崇耀 | Method of realizing vibration absorption and non-contact type power transmission using magnetic rheological fluid |
| CN102758874A (en) * | 2012-07-17 | 2012-10-31 | 北京化工大学 | Self-adaptive variable-damping variable-stiffness shock absorber for multi-frequency component vibration of rotary machine rotator |
| CN102758874B (en) * | 2012-07-17 | 2014-10-15 | 北京化工大学 | Self-adaptive variable-damping variable-stiffness shock absorber for multi-frequency component vibration of rotary machine rotator |
| CN105443857A (en) * | 2015-12-13 | 2016-03-30 | 北京化工大学 | Variable-damping vibration attenuation and noise reduction device for valve |
| CN105443857B (en) * | 2015-12-13 | 2018-06-29 | 北京化工大学 | A kind of variable damping vibration and noise reducing device for valve |
| CN105626755A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Small rotary type magneto-rheological fluid damper used for reproducing passive force sense |
| CN105626754A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Multi-fin rotary magneto-rheological fluid damper based on S-shaped magnetic circuit |
| CN108442555A (en) * | 2018-05-14 | 2018-08-24 | 西京学院 | A kind of half compound magnetic rheological liquid damper of active Self-resetting quality runner |
| CN108442555B (en) * | 2018-05-14 | 2020-11-03 | 西京学院 | Semi-active self-resetting mass rotating wheel composite magnetorheological fluid damper |
| CN109606532A (en) * | 2018-12-19 | 2019-04-12 | 哈尔滨工程大学 | Fluid drag-reduction noise reduction intelligent skin structure based on magnetorheological elastic material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Bingmei Document name: Correction notice |
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| 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 |