CN102128770B - Device for testing rheological properties of magnetorheological fluid - Google Patents
Device for testing rheological properties of magnetorheological fluid Download PDFInfo
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- CN102128770B CN102128770B CN 201010600407 CN201010600407A CN102128770B CN 102128770 B CN102128770 B CN 102128770B CN 201010600407 CN201010600407 CN 201010600407 CN 201010600407 A CN201010600407 A CN 201010600407A CN 102128770 B CN102128770 B CN 102128770B
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- magnetorheological fluid
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Abstract
The invention discloses a device for testing rheological properties of magnetorheological fluid, comprising a support, a motor, a rotating shaft, a static shaft and a shell. The device is characterized in that the lower end of the rotating shat extends into the shell and the lower end part of the rotating shaft is fixedly provided with a rotating disc, the upper end of the static shaft extends into the shell and the upper end part of the static shaft is fixedly provided with a static disc, a magnetic isolation disc and an annular magnetorheological fluid cavity are arranged between the rotating disc and the static disc, a sealing ring is sleeved on the static disc, the shell is internally provided with a magnetic isolation ring and an exciting coil, the magnetic isolating ring is arranged between the sealing ring and the exciting coil, the support is fixedly provided with a torque sensor, the lower end of the static shaft is connected with the torque sensor, and the upper end of the rotating shaft is connected with the output shaft of the motor. The device disclosed by the invention has the advantages that: the magnetorheological fluid cavity is arranged outside the magnetic isolation disc, thus the edge gathering effect of the magnetorheological fluid to be tested is reduced, and the consumption of the magnetorheological fluid is reduced; and the magnetorheological fluid cavity is arranged at the middle part of the exciting coil, thus a magnetic field at the magnetorheological fluid to be tested is strongest, the verticality and uniformity of the magnetic field are good, and the heat productivity is low.
Description
Technical field
The present invention relates to the characteristic research field of magnetic flow liquid, especially relate to a kind of proving installation of magnetic current and liquid flow variation characteristic.
Background technology
Magnetic flow liquid shows as low viscous flowable Newtonian fluid under zero magnetic field, and adding the polarized chain column type structure that is parallel to magnetic field that formed of the action of a magnetic field low suspension particle, this chain structure has stoped the motion of fluid, thereby the viscosity of suspending liquid is sharply increased, shear yield stress also approximately linear increases, show as the character of similar solid, after the externally-applied magnetic field effect was removed, it returned to original flowing property again rapidly.Therefore, shear yield stress and viscosity are the main performance parameters of magnetic flow liquid, and they are characterizing the state of cure of this kind material under the action of a magnetic field.
At present, mainly can be divided into two kinds of shear mode and channel flow patterns to the test of magnetic current and liquid flow variation characteristic by its mode of operation, and shear mode can be divided into rotary two kinds of the rotary and parallel video disc of concentric drums.Though the test of channel flow pattern can obtain higher shear rate, but the suspended particle that polarizes under higher the action of a magnetic field is easy in pipeline to assemble and mother liquor flows out along pipeline, the local increase of volume by volume concentration that causes magnetic flow liquid in the pipeline, make measurement result higher, also can produce the wall slippage effect simultaneously; The rotary test of concentric drums can produce fan-shaped magnetic field because of the diameter of cylinder inside and outside it is unequal, has defective on the principle; And for the rotary test of parallel video disc, excessive when the rotational speed of video disc, the suspended particle in the magnetic flow liquid can be assembled by action of centrifugal force to disk border, has the wall slippage effect; And when test magnetic flow liquid consumption more, relatively waste.
Summary of the invention
It is little that technical matters to be solved by this invention provides a kind of edge buildup effect, and measurement result accurately and the proving installation of the few magnetic current and liquid flow variation characteristic of magnetic flow liquid consumption.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of proving installation of magnetic current and liquid flow variation characteristic, comprise support, motor, rotation axis, stationary axle and housing, described housing is fixed on the described support, the lower end of described rotation axis is stretched in the described housing and the bottom is set with rolling disc, the upper end of described stationary axle is stretched in the described housing and the upper end is set with stationary disk, cooperate by bearing between described stationary axle and the described housing, be provided with magnetorheological sap cavity between described rolling disc and the described stationary disk every magnetic disk and annular, described magnetorheological sap cavity is arranged on described outside the magnetic disk, be arranged with sealing ring on the described stationary disk, the upper edge of described sealing ring is higher than described magnetorheological sap cavity, be provided with magnetism-isolating loop and field coil in the described housing, described magnetism-isolating loop is arranged between described sealing ring and the described field coil, be positioned in the described stationary disk described magnetorheological sap cavity under locate to be provided with Hall element and thermopair, be set with torque sensor on the described support, the lower end of described stationary axle connects with described torque sensor, and the upper end of described rotation axis and the output shaft of described motor link.
Sealing and fixing has the heat conduction end cap on the described housing, is provided with the thermal trough of annular in the described heat conduction end cap, and described heat conduction end cap is provided with conductive fluid input port and the conductive fluid delivery outlet that is communicated with described thermal trough.
Described housing comprises loam cake and lower cover, and described heat conduction end cap is fixedly installed on and covers under described, and the both sides of described loam cake are set with handle, make things convenient for the dismounting of loam cake.
Described loam cake is provided with viewport, convenient working condition of observing enclosure interior, and described sealing ring is the transparent sealing ring, whether the interpolation consumption of convenient observation magnetic flow liquid is suitable.
Described support is provided with the motor jacking gear, described motor jacking gear comprises screw mandrel, handwheel and electric machine support, described support is provided with lift span, fixedly connected with described handwheel in the upper end of described screw mandrel, described screw mandrel stretch in the described lift span and with described electric machine support bolt, the upper end snail of described screw mandrel is connected to double nut, and the lower end snail of described screw mandrel is connected to setscrew nut, and described motor is fixedly connected on the described electric machine support.
Described thermopair is electrically connected with temperature controller, and described Hall element and described torque sensor are electrically connected with data handling system respectively, and described data handling system comprises transmitter, data collecting card and host computer.
Described magnetorheological sap cavity is positioned at the middle part of described field coil.
Compared with prior art, advantage of the present invention is because magnetorheological sap cavity is arranged on outside the magnetic disk, has reduced the edge buildup effect of tested magnetic flow liquid, and has reduced the consumption of magnetic flow liquid; And magnetorheological sap cavity is arranged on the middle part of field coil, make the strongest and perpendicularity in the magnetic field at tested magnetic flow liquid place and good uniformity, thermal value little; Again owing to sealing and fixing on the housing has the heat conduction end cap, be provided with the thermal trough of annular in the heat conduction end cap, can in thermal trough, feed conductive fluid, can the magnetic flow liquid that work long hours be cooled off, also can study different temperatures the magnetic current and liquid flow variation Effect on Performance; And support is provided with the motor jacking gear, can regulate the height of motor by handwheel, lifting drive rolling disc by motor moves, realize the adjusting of clearance distance between rolling disc and the stationary disk, promptly realize the adjusting of magnetic flow liquid thickness, thereby can study thickness the magnetic current and liquid flow variation Effect on Performance; In addition, torque sensor is arranged on beyond the magnetic circuit, make its measurement not be subjected to the influence in magnetic field, and Hall element and temperature sensor is arranged on the below of magnetic flow liquid, can detect current magnetic field and temperature value in real time.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present invention;
Fig. 2 is the structural representation of enclosure interior of the present invention;
Fig. 3 is the enlarged diagram at the middle A place of Fig. 2.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in the figure, a kind of proving installation of magnetic current and liquid flow variation characteristic, comprise support 1, motor 2, rotation axis 3, stationary axle 4, screw mandrel 5, handwheel 6, electric machine support 21 and by loam cake 71, the housing that lower cover 72 is formed, support 1 is provided with lift span 11, fixedly connected with handwheel 6 in the upper end of screw mandrel 5, screw mandrel 5 stretch in the lift span 11 and with electric machine support 21 bolts, the upper end snail of screw mandrel 5 is connected to double nut 52, the lower end snail of screw mandrel 5 is connected to setscrew nut 51, motor 2 is fixedly connected on the electric machine support 21, lower cover 72 is fixed on the support 1, the lower end of rotation axis 3 is stretched in the housing and the bottom is set with rolling disc 31, the upper end of stationary axle 4 is stretched in the housing and the upper end is set with stationary disk 41, cooperate by bearing between stationary axle 4 and the lower cover 72, be provided with magnetorheological sap cavity 33 between rolling disc 31 and the stationary disk 41 every magnetic disk 32 and annular, magnetorheological sap cavity 33 is arranged on outside magnetic disk 32, be arranged with transparent sealing ring 42 on the stationary disk 41, the upper edge of transparent sealing ring 42 is higher than magnetorheological sap cavity 33, be provided with magnetism-isolating loop 73 and field coil 8 in the housing, magnetism-isolating loop 73 is arranged between transparent sealing ring 42 and the field coil 8, magnetorheological sap cavity 33 is positioned at the middle part of field coil 8, be positioned in the stationary disk 41 magnetorheological sap cavity 33 under locate to be provided with Hall element 43 and thermopair 44, be set with torque sensor 12 on the support 1, the lower end of stationary axle 4 connects with torque sensor 12, the upper end of rotation axis 3 is connected by the output shaft of shaft coupling with motor 2, sealing and fixing has heat conduction end cap 74 on the lower cover 72, be provided with the thermal trough 75 of annular in the heat conduction end cap 74, heat conduction end cap 74 is provided with conductive fluid input port 76 and the conductive fluid delivery outlet 77 that is communicated with thermal trough 75, the both sides of loam cake 71 are set with handle 78, loam cake 71 is provided with viewport 79, thermopair 44 is electrically connected with external temperature controller, Hall element 43 and torque sensor 12 are electrically connected with data handling system respectively, and data handling system comprises transmitter, data collecting card and host computer.
The principle of work of this device is: inject magnetic flow liquid in magnetorheological sap cavity 33, give field coil 8 energisings then and produce magnetic field, magnetic flow liquid its rheological characteristics under the effect of externally-applied magnetic field changes, motor 2 drives rolling disc 31 rotations by rotation axis 3 simultaneously, and shearing magnetic flow liquid, the shear stress that magnetic flow liquid produces is delivered on the torque sensor 12 by stationary disk 41 and stationary axle 4, strain bridge in the torque sensor 12 produces deformation and exports corresponding faint electric quantity change amount, faint electric quantity change amount is after the transmitter processing and amplifying, be input to host computer by the data collecting card acquired signal, can obtain and show corresponding shear yield stress value after the software processes after tested then, Hall element 43 detects the magnetic induction density that obtains in the magnetic flow liquid simultaneously, the voltage signal of Hall element 43 outputs amplifies through transmitter, data collecting card is input to host computer, can obtain and show corresponding magnetic induction density value after treatment; Thermopair 44 detects the working temperature of current magnetic flow liquid, and shows its temperature by temperature controller; The angular velocity of rotation of rolling disc 31 is recorded by the scrambler on the motor 2, based on the angular velocity of rolling disc, can calculate the shear strain rate of magnetic flow liquid through certain theory relation.
Claims (6)
1. the proving installation of a magnetic current and liquid flow variation characteristic, comprise support, motor, rotation axis, stationary axle and housing, described housing is fixed on the described support, the upper end of described rotation axis and the output shaft of described motor link, the lower end of described rotation axis is stretched in the described housing and the bottom is set with rolling disc, the upper end of described stationary axle is stretched in the described housing and the upper end is set with stationary disk, cooperate by bearing between described stationary axle and the described housing, be provided with magnetorheological sap cavity between described rolling disc and the described stationary disk every magnetic disk and annular, be arranged with sealing ring on the described stationary disk, the upper edge of described sealing ring is higher than described magnetorheological sap cavity, be provided with magnetism-isolating loop and field coil in the described housing, described magnetism-isolating loop is arranged between described sealing ring and the described field coil, it is described outside the magnetic disk to it is characterized in that described magnetorheological sap cavity is arranged on, described magnetorheological sap cavity is positioned at the middle part of described field coil, be positioned in the described stationary disk described magnetorheological sap cavity under locate to be provided with Hall element and thermopair, be set with torque sensor on the described support, the lower end of described stationary axle and described torque sensor link.
2. the proving installation of a kind of magnetic current and liquid flow variation characteristic as claimed in claim 1, it is characterized in that sealing and fixing has the heat conduction end cap on the described housing, be provided with the thermal trough of annular in the described heat conduction end cap, described heat conduction end cap is provided with conductive fluid input port and the conductive fluid delivery outlet that is communicated with described thermal trough.
3. the proving installation of a kind of magnetic current and liquid flow variation characteristic as claimed in claim 2 is characterized in that described housing comprises loam cake and lower cover, and described heat conduction end cap is fixedly installed on and covers under described, and the both sides of described loam cake are set with handle.
4. the proving installation of a kind of magnetic current and liquid flow variation characteristic as claimed in claim 3 is characterized in that described loam cake is provided with viewport, and described sealing ring is the transparent sealing ring.
5. the proving installation of a kind of magnetic current and liquid flow variation characteristic as claimed in claim 1, it is characterized in that described support is provided with the motor jacking gear, described motor jacking gear comprises screw mandrel, handwheel and electric machine support, described support is provided with lift span, fixedly connected with described handwheel in the upper end of described screw mandrel, described screw mandrel stretch in the described lift span and with described electric machine support bolt, the upper end snail of described screw mandrel is connected to double nut, the lower end snail of described screw mandrel is connected to setscrew nut, and described motor is fixedly connected on the described electric machine support.
6. the proving installation of a kind of magnetic current and liquid flow variation characteristic as claimed in claim 1, it is characterized in that described thermopair is electrically connected with temperature controller, described Hall element and described torque sensor are electrically connected with data handling system respectively, and described data handling system comprises transmitter, data collecting card and host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010600407 CN102128770B (en) | 2010-12-22 | 2010-12-22 | Device for testing rheological properties of magnetorheological fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010600407 CN102128770B (en) | 2010-12-22 | 2010-12-22 | Device for testing rheological properties of magnetorheological fluid |
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| Publication Number | Publication Date |
|---|---|
| CN102128770A CN102128770A (en) | 2011-07-20 |
| CN102128770B true CN102128770B (en) | 2013-07-31 |
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| CN 201010600407 Expired - Fee Related CN102128770B (en) | 2010-12-22 | 2010-12-22 | Device for testing rheological properties of magnetorheological fluid |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539288B (en) * | 2012-01-19 | 2014-07-23 | 中国矿业大学 | Double-coil type magnetorheological fluid rheological characteristic testing device |
| CN102879174B (en) * | 2012-08-30 | 2015-08-26 | 江苏大学 | Magnetic flow liquid yield stress method of testing and device thereof |
| CN103901168B (en) * | 2014-04-08 | 2015-09-23 | 中国矿业大学 | A kind of magnetic flow liquid characteristic tester |
| CN103983524B (en) * | 2014-06-11 | 2016-08-10 | 太原理工大学 | A kind of method utilizing calibrated wrench method test device to realize concrete crushing strength detection |
| CN106404889B (en) * | 2016-09-08 | 2019-08-02 | 上海应用技术大学 | Clearance adjustable type magnetorheological fluid Mechanics Performance Testing device |
| CN107560977A (en) * | 2017-09-05 | 2018-01-09 | 河海大学 | A kind of sinusoidal power oscillatory type shear rheology instrument |
| CN108287180B (en) * | 2017-12-08 | 2023-11-07 | 浙江师范大学 | Magnetorheological fluid sedimentation detection device simulating actual working conditions |
| CN108196209B (en) * | 2017-12-18 | 2019-07-30 | 中国矿业大学 | A kind of magnetorheological fluid characteristic tester |
| CN108776083B (en) * | 2018-04-17 | 2020-07-03 | 中国人民解放军陆军勤务学院 | Magnetorheological fluid redispersibility quantitative test method |
| CN110031365A (en) * | 2019-03-03 | 2019-07-19 | 浙江师范大学 | The sliding effect detection device of magnetorheological liquid wall |
| CN110736682B (en) * | 2019-10-23 | 2022-01-11 | 合肥工业大学 | Magnetorheological suspensions flow mode rheology attribute testing arrangement |
| CN111722162B (en) * | 2020-07-15 | 2022-09-02 | 中国民航大学 | Magnetic field testing device for polar coordinate type magnetorheological damper |
| CN111948586B (en) * | 2020-08-07 | 2023-06-30 | 科马智能悬架技术(青岛)有限公司 | Magnetorheological fluid fatigue test system |
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| US5365777A (en) * | 1993-12-03 | 1994-11-22 | Halliburton Company | Rheometer with flow diverter to eliminate end effects |
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| CN101701894A (en) * | 2009-10-30 | 2010-05-05 | 谭晓婧 | Test system of spindle-type magnetorheological fluid performance |
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2010
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Patent Citations (6)
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|---|---|---|---|---|
| US5365777A (en) * | 1993-12-03 | 1994-11-22 | Halliburton Company | Rheometer with flow diverter to eliminate end effects |
| AU6992398A (en) * | 1997-06-05 | 1998-12-10 | Ampolex Limited | Drilling fluid rheometer |
| CN1388366A (en) * | 2001-05-25 | 2003-01-01 | 中国科学技术大学 | Test system for rheological characteristics of magnetic rheological liquid |
| CN1746654A (en) * | 2005-09-15 | 2006-03-15 | 上海交通大学 | Magnetic current and liquid flow variation characteristic measuring system |
| CN201368172Y (en) * | 2009-03-19 | 2009-12-23 | 宁波大学 | Magneto rheological fluid damper |
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Non-Patent Citations (1)
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| W.H. Li 等.Experimental investigation of creep and recovery behaviors of magnetorheological fluids.《Materials Science and Engineering A》.2002,第333卷368–376. * |
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