CN102759498A - Dual-runner magnetorheological fluids (MRFs) characteristic test device and test method thereof - Google Patents
Dual-runner magnetorheological fluids (MRFs) characteristic test device and test method thereof Download PDFInfo
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- CN102759498A CN102759498A CN2012102708449A CN201210270844A CN102759498A CN 102759498 A CN102759498 A CN 102759498A CN 2012102708449 A CN2012102708449 A CN 2012102708449A CN 201210270844 A CN201210270844 A CN 201210270844A CN 102759498 A CN102759498 A CN 102759498A
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Abstract
The invention discloses a dual-runner magnetorheological fluids (MRFs) characteristic test device and a test method thereof. The dual-runner MRFs characteristic test device comprises a stand column, magnet carrier plates, an MRFs carrier plate, a test device, a power control device and a data processing system, wherein the magnet carrier plates are movably arranged on the stand column, a central shaft of the MRFs carrier plate is provided with a support and is connected with the power control device, and the test device is used for testing relative shear strain signals of the MRFs carrier plate and inputting the signals into the data processing system for processing and analyzing. According to the invention, the dual-runner MRFs test device provided with an upper runner and a lower runner is adopted, strong magnet blocks arranged on the magnet carrier plates are used for supplying a discrete type magnetic field with the magnetic domain being 0-6000Gs under five-section discrete control, the shear strain rate is continuous and adjustable, and shear strain and test devices are larger in measuring range and higher in precision, so that the MRFs shear strain rate and the MRFs shear stress can be tested; and compared with the traditional equipment, the dual-runner MRFs characteristic test device is greatly reduced in cost and is economic and applicable.
Description
Technical field
The present invention relates to a kind of magnetic flow liquid proving installation, particularly a kind of proving installation of magnetic current and liquid flow variation characteristic.
Background technology
Magnetic flow liquid belongs to a kind of novel intelligent material, and application prospect is very optimistic, but the device of testing its performance seldom, and measurement result receives the range and the accuracy limitations of surveying instrument, and costs an arm and a leg.
(Magnetorheological Fluids MRFs) is made up of insulation mother liquor and uniformly dispersing magnetic medium particulate therein magnetic flow liquid, not having to meet the constitutive relation of Newtonian fluid under the state of the action of a magnetic field, lower viscosity is arranged; When it is in strong magnetic field action following time; Its suspended particle is responded to by magnetic neutrality becomes ferromagnetism; Between magnetic pole, form the bridge of " chain " shape, make it become glutinous plastomer by liquid, show as a kind of constitutive relation that is similar to solid with certain yield force in moment.Since magnetic flow liquid is invented in 1948 by Rabinow; In machinery, Aero-Space, oil, civil engineering work; Existing certain experiment and theoretical research in numerous engineerings such as robotization and vibration control field, however relevant proving installation can not satisfy increasingly extensive scientific research demand, though the proving installation of magnetic flow liquid yield stress has quite a few kinds; But cut both ways; And cost an arm and a leg, the development of dependence test device is very urgent, hopes that this work can advance the research and the high speed development of magnetic flow liquid.
Therefore be badly in need of that a kind of cost is low, range is big and the high magnetic flow liquid proving installation of measuring accuracy.
Summary of the invention
In view of this, technical matters to be solved by this invention provides that a kind of cost is low, range is big and the high magnetic flow liquid proving installation of measuring accuracy.This device can be realized MRFs shear stress and experimental analysis, and moment of inertia is little, and small and exquisite exquisiteness is economic and practical.
One of the object of the invention is to propose a kind of dual channel magnetic flow liquid MRFs characteristic test device; Two of the object of the invention is the method for testings that propose a kind of dual channel magnetic flow liquid MRFs characteristic test device.
One of the object of the invention is realized through following technical scheme:
Dual channel magnetic flow liquid MRFs characteristic test device provided by the invention comprises column, magnet support plate, MRFs carrier fluid plate, proving installation, power control unit and data handling system,
Said magnet support plate is movably set on the column; The central shaft of said MRFs carrier fluid plate is provided with support; It is inner that said MRFs carrier fluid plate is arranged at the magnet support plate; Said power control unit is connected with central shaft and is used for controlling and driving MRFs carrier fluid plate, and said proving installation is arranged at and is used on the central shaft test the relative shear strain signal that MRFs carrier fluid plate takes place, and said shear strain signal is input to and carries out Treatment Analysis in the data handling system.
Further, said MRFs carrier fluid plate is provided with upper runner MRFs carrier fluid groove and lower flow channel MRFs carrier fluid groove, and said upper and lower runner MRFs carrier fluid groove is a concentric shafts.
Further; Said magnet support plate comprises that the first magnet support plate, the second magnet support plate are movably set on the column respectively; Cooperate when the said first magnet support plate and the second magnet support plate lump together to form an integrated magnets support plate, the said first magnet support plate comprises magnet support plate A and magnet support plate B, and said magnet support plate A and magnet support plate B are overlapping to be arranged on the column; The said second magnet support plate comprises magnet support plate C and magnet support plate D, said magnet support plate C and overlapping being arranged on the column of magnet support plate D.
Further, said proving installation comprises strain detection testing device and digital strainometer interface; Said strain detection testing device comprises fixed part and rotor portion; Said fixed part is coaxial to be arranged on the central shaft; Said rotor portion is provided with the shearing strain sensor that is used to measure the required torque of rotor portion, and said shearing strain sensor is connected with digital strainometer through the digital strainometer interface that is arranged on the rotor portion.
Further, said power control unit comprises propulsion system and rotational speed governor, and said propulsion system are connected with rotational speed governor, and said rotational speed governor is connected with central shaft.
Further, also comprise some strong magnet pieces, said strong magnet piece is arranged at and is used in the magnet support plate carrying out magnetic field control through stack strong magnet piece.
Further; Said MRFs carrier fluid groove and rotor adopt bronze to be prepared from; The thickness of said upper and lower runner MRFs carrier fluid groove is 1mm, and the perform region width of said upper and lower runner MRFs carrier fluid groove is
.
Two of the object of the invention is realized through following technical scheme:
The method of testing of MRFs proving installation provided by the invention may further comprise the steps:
S1: assembling MRFs proving installation, load magnetic flow liquid MRFs, the strong magnet piece is mounted to the perform region of magnet support plate;
S2: connect the power supply of MRFs proving installation, the rotating speed of adjustment strain detection testing device rotor part;
S3: test magnetic flow liquid MRFs shearing strain rate and MRFs shear stress;
S4: after changing the strong magnet piece, repeat the test of magnetic flow liquid MRFs shearing strain rate and MRFs shear stress;
S5: then finish up to satisfying test request.
Further, the strong magnet piece is provided with by downfield to highfield among the said step S1; The rotating speed of said step S2 rotor part is progressively to running at a high speed by low speed.
Further, after said step S5 experiment finishes, dismounting strong magnet piece, and clean upper and lower runner MRFs carrier fluid groove.
The invention has the advantages that: the present invention adopts the dual channel magnetic flow liquid proving installation that is provided with upper and lower runner MRFs carrier fluid groove; Strong magnet piece through the setting of magnet support plate provides discrete type magnetic field; Its magnetic field range 0-6000Gs divides 5 sections discrete controls, and the shearing strain rate continues adjustable in 1-1000
scope; Shearing strain and proving installation range are bigger; Precision is higher, can realize the test of MRFs shearing strain rate and MRFs shear stress, and this installs more existing equipment; Cost reduces significantly, and is economic and practical.
Other advantage of the present invention, target and characteristic will be set forth in instructions subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from practice of the present invention, obtain instruction to investigating of hereinafter.Target of the present invention and other advantage can be passed through following instructions, claims, and the structure that is particularly pointed out in the accompanying drawing realizes and obtains.
Description of drawings
In order to make the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is made further detailed description below, wherein:
Velocity distribution when Fig. 1 shears for MRFs;
Fig. 2 is a MRFs proving installation structural drawing;
Fig. 3 always schemes for dual channel magnetic flow liquid MRFs characteristic test device;
Fig. 4 is a dual channel magnetic flow liquid MRFs characteristic test device vertical view (housing is a base plate);
Fig. 5 is a MRFs dual channel installation drawing;
Fig. 6 is MRFs torque measuring device finite element analysis figure;
Fig. 7 is the grid chart before analyzing;
Fig. 8 is the linear relationship chart after analyzing.
Embodiment
Below will combine accompanying drawing, the preferred embodiments of the present invention will be carried out detailed description; Should be appreciated that preferred embodiment has been merely explanation the present invention, rather than in order to limit protection scope of the present invention.
Velocity distribution when Fig. 1 shears for MRFs; Fig. 2 is a MRFs proving installation structural drawing; Fig. 3 always schemes for dual channel magnetic flow liquid MRFs characteristic test device; Fig. 4 is a dual channel magnetic flow liquid MRFs characteristic test device vertical view (housing is a base plate); Fig. 5 is a MRFs dual channel installation drawing; Fig. 6 is MRFs torque measuring device finite element analysis figure, and Fig. 7 is the grid chart before analyzing; Fig. 8 is the linear relationship chart after analyzing; As shown in the figure: dual channel magnetic flow liquid MRFs characteristic test device provided by the invention; Comprise column 1, magnet support plate 2, MRFs carrier fluid plate 4, proving installation, power control unit and data handling system; Said magnet support plate 2 is movably set on the column 1; The central shaft of said MRFs carrier fluid plate 4 is provided with support 31, and said MRFs carrier fluid plate 4 is arranged at magnet support plate 2 inside, and said power control unit is connected with central shaft and is used for controlling and driving MRFs carrier fluid plate 4; Said proving installation is arranged at and is used on the central shaft test the relative shear strain signal that MRFs carrier fluid plate takes place, and said shear strain signal is input to and carries out Treatment Analysis in the data handling system.
Said MRFs carrier fluid plate 4 is provided with upper runner MRFs carrier fluid groove 32 and lower flow channel MRFs carrier fluid groove 33; Said upper and lower runner MRFs carrier fluid groove is a concentric shafts, makes the effect down cut in the magnetic field of magnetic flow liquid in being arranged at the magnet support plate in the magnetorheological liquid bath that is provided with on the MRFs carrier fluid plate change.
Said magnet support plate 2 comprises that the first magnet support plate 21, the second magnet support plate 22 are movably set in respectively on the column 1; Cooperate when the said first magnet support plate 21 and the second magnet support plate 22 lump together and form an integrated magnets support plate; The said first magnet support plate comprises magnet support plate A23 and magnet support plate B24; Said magnet support plate A23 and magnet support plate B24 are overlapping to be arranged on the column; The said second magnet support plate 22 comprises magnet support plate C25 and magnet support plate D26, and said magnet support plate C25 and magnet support plate D26 are overlapping to be arranged on the column 1.
Said proving installation comprises strain detection testing device 3 and digital strainometer interface 7; Said strain detection testing device 3 comprises fixed part and rotor portion; Said fixed part is coaxial to be arranged on the central shaft; Said rotor portion is provided with the shearing strain sensor that is used to measure the required torque of rotor portion, and said shearing strain sensor is connected with digital strainometer through the digital strainometer interface that is arranged on the rotor portion.
Said power control unit comprises propulsion system 5 and rotational speed governor 6, and said propulsion system 5 are connected with rotational speed governor 6, and said rotational speed governor is connected with central shaft.Said rotational speed governor is realized the stepless control to rotating speed through regulating frequency.
Also comprise some strong magnet pieces, said strong magnet piece is arranged at and is used in the magnet support plate carrying out magnetic field control through stack strong magnet piece.
Said MRFs carrier fluid groove and rotor adopt bronze to be prepared from; The thickness of said upper and lower runner MRFs carrier fluid groove is 1mm, and the perform region width of said upper and lower runner MRFs carrier fluid groove is
.
The purpose that upper and lower runner MRFs carrier fluid groove is set is: this upper and lower runner MRFs carrier fluid groove is symmetry shape, can prevent the liquid-solid friction of one side, the solid friction of one side; Simultaneously can also avoid carrier fluid plate rolling disc and magnet support plate to interfere, can play the fine setting effect when not parallel of carrier fluid plate rolling disc and carrier fluid plate.
The method of testing of MRFs proving installation provided by the invention may further comprise the steps:
S1: assembling MRFs proving installation, load magnetic flow liquid MRFs, the strong magnet piece is mounted to the perform region of magnet support plate; Said strong magnet piece is provided with by downfield to highfield;
S2: connect the power supply of MRFs proving installation, the rotating speed of adjustment strain detection testing device rotor part; The rotating speed of said rotor portion is progressively to running at a high speed by low speed;
S3: test magnetic flow liquid MRFs shearing strain rate and MRFs shear stress;
S4: after changing the strong magnet piece, repeat the test of magnetic flow liquid MRFs shearing strain rate and MRFs shear stress;
S5: then finish up to satisfying test request, dismounting strong magnet piece, and clean upper and lower runner MRFs carrier fluid groove.
Wherein the angular velocity of rotor portion is controlled by motor.Wherein AC servo motor is adopted in power section, rated power 150W, and rotating speed 0-150r/min guarantees the stepless control of shearing strain rate.
When motor speed is stablized, keep rotor to be in the at the uniform velocity required torque of state running of balance, can measure the required torque M of rotor through the shearing strain sensing device of rotor.Introduce the design and the finite element checking of the shearing strain sensing device of rotor below.Want to measure the torque of rotor, can above the rotor concentric shafts, set up a thin-wall tubular structure, paste foil gauge again, through digital strainometer read rotor torque the strain of corresponding thin cylinder.Application of finite element software Abaqus analyzes shear and optimizes, and the strain analysis result is like Fig. 7, shown in 8, and Fig. 7 is the grid chart before analyzing; Fig. 8 is the linear relationship chart after analyzing.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, belong within the scope of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. dual channel magnetic flow liquid MRFs characteristic test device is characterized in that: comprise column, magnet support plate, MRFs carrier fluid plate, proving installation, power control unit and data handling system,
Said magnet support plate is movably set on the column; The central shaft of said MRFs carrier fluid plate is provided with support; It is inner that said MRFs carrier fluid plate is arranged at the magnet support plate; Said power control unit is connected with central shaft and is used for controlling and driving MRFs carrier fluid plate, and said proving installation is arranged at and is used on the central shaft test the relative shear strain signal that MRFs carrier fluid plate takes place, and said shear strain signal is input to and carries out Treatment Analysis in the data handling system.
2. dual channel magnetic flow liquid MRFs characteristic test device according to claim 1 is characterized in that: said MRFs carrier fluid plate is provided with upper runner MRFs carrier fluid groove and lower flow channel MRFs carrier fluid groove, and said upper and lower runner MRFs carrier fluid groove is a concentric shafts.
3. dual channel magnetic flow liquid MRFs characteristic test device according to claim 2; It is characterized in that: said magnet support plate comprises that the first magnet support plate, the second magnet support plate are movably set on the column respectively; Cooperate when the said first magnet support plate and the second magnet support plate lump together and form an integrated magnets support plate; The said first magnet support plate comprises magnet support plate A and magnet support plate B; Said magnet support plate A and magnet support plate B are overlapping to be arranged on the column, and the said second magnet support plate comprises magnet support plate C and magnet support plate D, said magnet support plate C and overlapping being arranged on the column of magnet support plate D.
4. dual channel magnetic flow liquid MRFs characteristic test device according to claim 3, it is characterized in that: said proving installation comprises strain detection testing device and digital strainometer interface; Said strain detection testing device comprises fixed part and rotor portion; Said fixed part is coaxial to be arranged on the central shaft; Said rotor portion is provided with the shearing strain sensor that is used to measure the required torque of rotor portion, and said shearing strain sensor is connected with digital strainometer through the digital strainometer interface that is arranged on the rotor portion.
5. dual channel magnetic flow liquid MRFs characteristic test device according to claim 4; It is characterized in that: said power control unit comprises propulsion system and rotational speed governor; Said propulsion system are connected with rotational speed governor, and said rotational speed governor is connected with central shaft.
6. dual channel magnetic flow liquid MRFs characteristic test device according to claim 5 is characterized in that: also comprise some strong magnet pieces, said strong magnet piece is arranged at and is used in the magnet support plate carrying out magnetic field control through stack strong magnet piece.
7. dual channel magnetic flow liquid MRFs characteristic test device according to claim 6; It is characterized in that: said MRFs carrier fluid groove and rotor adopt bronze to be prepared from; The thickness of said upper and lower runner MRFs carrier fluid groove is 1mm, and the perform region width of said upper and lower runner MRFs carrier fluid groove is
.
8. the method for testing of dual channel magnetic flow liquid MRFs characteristic test device is characterized in that: may further comprise the steps:
S1: assembling MRFs proving installation, load magnetic flow liquid MRFs, the strong magnet piece is mounted to the perform region of magnet support plate;
S2: connect the power supply of MRFs proving installation, the rotating speed of adjustment strain detection testing device rotor part;
S3: test magnetic flow liquid MRFs shearing strain rate and MRFs shear stress;
S4: after changing the strong magnet piece, repeat the test of magnetic flow liquid MRFs shearing strain rate and MRFs shear stress;
S5: then finish up to satisfying test request.
9. the method for testing of dual channel magnetic flow liquid MRFs characteristic test device according to claim 8, it is characterized in that: the strong magnet piece is provided with by downfield to highfield among the said step S1; The rotating speed of said step S2 rotor part is progressively to running at a high speed by low speed.
10. the method for testing of dual channel magnetic flow liquid MRFs characteristic test device according to claim 8 is characterized in that: after said step S5 experiment finishes, and dismounting strong magnet piece, and clean upper and lower runner MRFs carrier fluid groove.
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| CN201210270844.9A CN102759498B (en) | 2012-08-01 | 2012-08-01 | Dual-runner magnetorheological fluids (MRFs) characteristic test device and test method thereof |
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Citations (5)
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| 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 |
| CN101246109A (en) * | 2008-03-25 | 2008-08-20 | 中国人民解放军国防科学技术大学 | Magnetorheological polishing solution rheology testing device |
| CN201517988U (en) * | 2009-06-09 | 2010-06-30 | 赵海涛 | Testing device of rheological behavior of magnetorheological fluid |
| US20110030454A1 (en) * | 2006-08-23 | 2011-02-10 | Martin Laun | Rheometer |
| CN102175576A (en) * | 2011-01-27 | 2011-09-07 | 重庆大学 | Horizontal annular slot type test device for magnetorheological material |
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2012
- 2012-08-01 CN CN201210270844.9A patent/CN102759498B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US20110030454A1 (en) * | 2006-08-23 | 2011-02-10 | Martin Laun | Rheometer |
| CN101246109A (en) * | 2008-03-25 | 2008-08-20 | 中国人民解放军国防科学技术大学 | Magnetorheological polishing solution rheology testing device |
| CN201517988U (en) * | 2009-06-09 | 2010-06-30 | 赵海涛 | Testing device of rheological behavior of magnetorheological fluid |
| CN102175576A (en) * | 2011-01-27 | 2011-09-07 | 重庆大学 | Horizontal annular slot type test device for magnetorheological material |
Non-Patent Citations (2)
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| 常建 等: "一种磁流变液流变特性测试装置的研究", 《仪器仪表学报》 * |
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