CN103674783A - Double-coil magneto-rheological fluid performance test device - Google Patents
Double-coil magneto-rheological fluid performance test device Download PDFInfo
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- CN103674783A CN103674783A CN201310706791.5A CN201310706791A CN103674783A CN 103674783 A CN103674783 A CN 103674783A CN 201310706791 A CN201310706791 A CN 201310706791A CN 103674783 A CN103674783 A CN 103674783A
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Abstract
The invention relates to a double-coil magneto-rheological fluid performance test device. An upper pressing plate is connected with a base through a shearing working region magnetic core; two sides of the shearing working region magnetic core are fixedly connected with magnetic mandrils and excitation coils respectively to form a double-coil magnetic circuit; an upper disk and a lower shaft disk are arranged between the lower end of the shearing working region magnetic core and the upper end of the base; a copper O-shaped check ring is connected between the upper disk and the lower shaft disk and is positioned in a groove of the lower shaft disk to form a shearing working region. The magnetic circuit of the double-coil magneto-rheological fluid performance test device adopts two coils, so that the overall structure is compact and is easy to assemble; furthermore, a magnetic field constructed by the double-coil magnetic circuit in the shearing working region is difficult to be saturated, so that the rheological property of magneto-rheological fluid can be more accurately measured. The double-coil magneto-rheological fluid performance test device is simple in structure and easy to assemble; the air-gap reluctance of the magnetic circuit is low, and the measurement is more precise.
Description
Technical field
The present invention relates to a kind of magnetic current and liquid flow variation performance testing device, especially a kind of twin coil magnetorheological fluid performance proving installation.
Background technology
Magnetorheological fluid performance proving installation is a kind ofly to take magnetic flow liquid as tested object, the mechanism of the cutting performance of test magnetic flow liquid.The suspending liquid that magnetic flow liquid is comprised of carrier fluid, magnetic conductivity particle and adjuvant three parts, does not have externally-applied magnetic field to do the used time, and that this suspending liquid shows as is low viscous, the Newtonian fluid characteristic of good fluidity; Once set up externally-applied magnetic field, and reach certain magnetic induction density, magnetic flow liquid will present full-bodied class solid state, show the complicated character such as viscoelasticity, visco-plasticity simultaneously.This process is reversible, and the response time is fast, reaches Millisecond.Magnetic flow liquid under this state, has resistance to compression, tension and shear resistance, and can produce corresponding damping.Due to the relevant device of magnetic flow liquid, particularly damper, have that adjustable extent is wide, a fast response time, low in energy consumption, advantages of simple structure and simple, in vibration control fields such as mechanical vibration, vehicle, building structure, be with a wide range of applications.
Most of drum type brake or the cone disk type of adopting of current magnetorheological fluid performance proving installation, the structure of these testing apparatuss, shortcoming is obvious.Be mainly reflected in that complex structure is not easy to realize and Distribution of Magnetic Field is inhomogeneous.
Summary of the invention
In order to solve the problems such as magnetic resistance that magnetic field Premature saturation and magnetic circuit gap produce is excessive, the invention provides a kind of twin coil magnetorheological fluid performance proving installation, this device utilizes twin coil and closed magnetic structure.Wherein, closed magnetic structure is to guarantee by the machining precision of each parts and assembly relation, and this structure not only simple, good economy performance, air-gap reluctance is low, and magnetic field is even, and easy for installation, testing precision is high.
For achieving the above object, the present invention adopts following technical proposals: a kind of twin coil magnetorheological fluid performance proving installation, comprise magnetic conduction plug, upper dish, top board, shearing work district magnetic core, field coil, base, be characterized in: between top board and base, by shearing work district magnetic core, link together, be positioned at magnetic core both sides, shearing work district and be fixedly connected with respectively magnetic conduction plug and field coil formation twin coil magnetic circuit.
Between magnetic core lower end, shearing work district and base upper end, dish and lower shaft disk are housed, between upper dish and lower shaft disk, are connected with copper O type back-up ring, and copper O type back-up ring is placed in the groove of lower shaft disk, be used to form shearing work district.
The bottom of shearing work district magnetic core has the aperture of a dress teslameter probe.
Magnetic conduction plug bottom and base are excessively connected, and the via clearance on top and top board is connected, and between top board and shearing work district magnetic core, clearance fit is connected, and shearing work district magnetic core is connected with the axis hole clearance fit on base.
In magnetic core top, shearing work district, by the second bearing, connect main drive shaft, base bottom has for the axial hole of static small-range torque sensor is installed.
Magnetic conduction plug, top board, shearing work district magnetic core and base are made by the 20# steel of high magnetic permeability, low magnetic hysteresis and low-coercivity, and main drive shaft, upper dish are made by 45# steel.Upper dish is stepped.
The present invention compared with prior art, has following beneficial effect:
1) magnetic loop in structure adopts twin coil, makes total not only compact, and is easy to assembling.In addition, the magnetic field that twin coil magnetic circuit is set up in shearing work district, is not easy to reach capacity, and can measure more accurately magnetic current and liquid flow variation performance.
2) simple in structure, be easy to assembling, magnetic air gap magnetic resistance is little, measures more accurate.
Accompanying drawing explanation
Fig. 1 is twin coil magnetorheological fluid performance proving installation structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, twin coil magnetorheological fluid performance proving installation mainly comprises: static small-range torque sensor 1, lower shaft disk 2, clutch shaft bearing 3, magnetic conduction plug 4, upper dish 5, top board 6, nut 7, shearing work district magnetic core 8, bolt 9, main drive shaft 10, servomotor 11, the first shaft coupling 12, motor support plate 13, the second bearing 14, field coil 15, copper O type back-up ring 16, the second shaft coupling 17, base 18 and bolt 19.
Between top board 6 and base 18, by shearing work district magnetic core 8, link together, be positioned at magnetic core 8 both sides, shearing work district and be fixedly connected with respectively magnetic conduction plug 4 and field coil 15 formation twin coil magnetic circuits.
Between magnetic core 8 lower ends, shearing work district and base 18 upper ends, dish 5 and lower shaft disk 2 are housed, between upper dish 5 and lower shaft disk 2, are connected with copper O type back-up ring 16, and copper O type back-up ring 16 is placed in the groove of lower shaft disk 2, be used to form shearing work district.
Wherein copper O type back-up ring 16 is bronze material making, and by the groove of opening on lower shaft disk 2, is arranged on wherein, is used to form shearing work district, is also convenient to holding of magnetic flow liquid.Except main drive shaft 10 and upper dish 5, adopt outside 45# steel, all the other materials are all to adopt the low magnetic hysteresis material of high magnetic permeability 20# steel to do.The bottom of shearing work district magnetic core 8 has an aperture, for packing into the probe of teslameter, so that the magnetic induction density in test magnetic field.After coil is wound on magnetic conduction plug 4, one end of magnetic conduction plug 4 is by excessively coordinating and be connected with base 18.And perforate on top and top board 6 adopts clearance fit, be convenient to installing/dismounting; One end of magnetic conduction plug 4 reinforces employing nut 7, and top board 6 is clearance fit with shearing work district magnetic core 8.
Shearing work district evenly and the foundation of controllable magnetic field be to depend on the magnetic loop that the magnetic structure of twin coil and compact mechanical mechanism form.Magnetic conduction plug 4, top board 6, shearing work district magnetic core 8 and base 18 all adopt the 20# steel of high magnetic permeability, low magnetic hysteresis and low-coercivity to do, and form basic magnetic loop, and main drive shaft 10, upper dish 5 adopt 45# steel.The aperture of shearing work district magnetic core 8 is to pop one's head in to measure the magnetic induction density in shearing work district in order to insert teslameter.Field coil 15 is main adopts the copper conductor coiling that diameter is 1mm to form, and is wrapped in magnetic conduction magnetic core stick 4.The direct current generator 11 of driving mechanism is arranged in motor support plate 13, and is connected with main drive shaft 10 by shaft coupling 12.
Adopt and shear tray type structure, the distance of upper lower burrs is between 0-2mm, and for fear of the impact on magnetic flow liquid shearing work district Distribution of Magnetic Field, it adopts non magnetic back-up ring around.Upper dish is driving disc spacing pressing, pass through driving mechanism---motor, controller and gear train, dish in drive, by acting on the magnetic flow liquid in shearing work district, moment of torsion is passed to lower wall, then by signal acquisition and processing system, the torque signal transmitting is carried out to acquisition and processing, thereby study the rheological property of different magnetic flow liquids under different externally-applied magnetic fields.
The present invention adopts shearing disc type, shearing work district is sealed simultaneously, is equivalent to place certain thickness magnetic flow liquid at airtight magnetic field space, and mechanical part assembling is compact, simple, has guaranteed the homogeneity in magnetic field.
For the high requirement of precision in the shear yield strength test of magnetic flow liquid, the present invention adopts two coil configuration, not only easily set up magnetic field, shearing work district, and magnetic field is not easy to reach capacity, the saturated test that can affect magnetic current and liquid flow variation performance that magnetic field is too early.In whole magnetic circuit, owing to being designed to closing form, air-gap reluctance loss is little.
Claims (7)
1. a twin coil magnetorheological fluid performance proving installation, comprise magnetic conduction plug (4), upper dish (5), top board (6), shearing work district magnetic core (8), field coil (15), base (18), be characterized in: between top board (6) and base (18), by shearing work district magnetic core (8), link together, be positioned at shearing work district magnetic core (8) both sides and be fixedly connected with respectively magnetic conduction plug (4) and field coil (15) formation twin coil magnetic circuit.
2. twin coil magnetorheological fluid performance proving installation according to claim 1, it is characterized in that: between magnetic core (8) lower end, described shearing work district and base (18) upper end, dish (5) and lower shaft disk (2) are housed, between upper dish (5) and lower shaft disk (2), be connected with copper O type back-up ring (16), and copper O type back-up ring (16) is placed in the groove of lower shaft disk (2), is used to form shearing work district.
3. twin coil magnetorheological fluid performance proving installation according to claim 1, is characterized in that: the bottom of described shearing work district magnetic core (8) has the aperture of a dress teslameter probe.
4. twin coil magnetorheological fluid performance proving installation according to claim 1, it is characterized in that: described magnetic conduction plug (4) bottom and base (18) are excessively connected, via clearance on top and top board (6) is connected, between top board (6) and shearing work district magnetic core (8), clearance fit is connected, and shearing work district magnetic core (8) is connected with the axis hole clearance fit on base (18).
5. twin coil magnetorheological fluid performance proving installation according to claim 1, it is characterized in that: in described shearing work district magnetic core (8) top, by the second bearing (14), connect main drive shaft (10), base (18) bottom has for the axial hole of static small-range torque sensor 1 is installed.
6. twin coil magnetorheological fluid performance proving installation according to claim 1, it is characterized in that: described magnetic conduction plug (4), top board (6), shearing work district magnetic core (8) and base (18) are made by the 20# steel of high magnetic permeability, low magnetic hysteresis and low-coercivity, main drive shaft (10), upper dish (5) are made by 45# steel.
7. twin coil magnetorheological fluid performance proving installation according to claim 1, is characterized in that: described upper dish (5) is stepped.
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| CN201310706791.5A CN103674783A (en) | 2013-12-20 | 2013-12-20 | Double-coil magneto-rheological fluid performance test device |
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| CN201310706791.5A CN103674783A (en) | 2013-12-20 | 2013-12-20 | Double-coil magneto-rheological fluid performance test device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897523A (en) * | 2015-05-15 | 2015-09-09 | 上海交通大学 | Magnetic fluid rheological property test system and method |
| CN104913871A (en) * | 2015-05-18 | 2015-09-16 | 上海应用技术学院 | Single-coil magnetorheological fluid normal stress testing device |
| CN107044497A (en) * | 2017-03-29 | 2017-08-15 | 浙江师范大学 | A kind of turntable positioning device based on magnetic rheology effect |
| CN110031365A (en) * | 2019-03-03 | 2019-07-19 | 浙江师范大学 | The sliding effect detection device of magnetorheological liquid wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4524611A (en) * | 1982-05-11 | 1985-06-25 | Association Pour La Recherche Et Le Developpement Des Methodes Et Processus Industriels (Armines) | Rheometer for measuring high pressure and high temperature with sampling |
| 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 |
| CN202471552U (en) * | 2012-01-19 | 2012-10-03 | 中国矿业大学 | Two-coil type device for testing rheological property of magnetorheogical fluid |
-
2013
- 2013-12-20 CN CN201310706791.5A patent/CN103674783A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4524611A (en) * | 1982-05-11 | 1985-06-25 | Association Pour La Recherche Et Le Developpement Des Methodes Et Processus Industriels (Armines) | Rheometer for measuring high pressure and high temperature with sampling |
| 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 |
| CN202471552U (en) * | 2012-01-19 | 2012-10-03 | 中国矿业大学 | Two-coil type device for testing rheological property of magnetorheogical fluid |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104897523A (en) * | 2015-05-15 | 2015-09-09 | 上海交通大学 | Magnetic fluid rheological property test system and method |
| CN104897523B (en) * | 2015-05-15 | 2018-02-09 | 上海交通大学 | A kind of magnetic liquid rheological equationm of state test system and method |
| CN104913871A (en) * | 2015-05-18 | 2015-09-16 | 上海应用技术学院 | Single-coil magnetorheological fluid normal stress testing device |
| CN107044497A (en) * | 2017-03-29 | 2017-08-15 | 浙江师范大学 | A kind of turntable positioning device based on magnetic rheology effect |
| CN107044497B (en) * | 2017-03-29 | 2023-08-11 | 浙江师范大学 | Carousel positioner based on magneto rheological effect |
| CN110031365A (en) * | 2019-03-03 | 2019-07-19 | 浙江师范大学 | The sliding effect detection device of magnetorheological liquid wall |
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Application publication date: 20140326 |