CN102359917A - Device for detecting frictional wear characteristics of magnetorheological fluid under magnetic field - Google Patents
Device for detecting frictional wear characteristics of magnetorheological fluid under magnetic field Download PDFInfo
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- CN102359917A CN102359917A CN2011102006899A CN201110200689A CN102359917A CN 102359917 A CN102359917 A CN 102359917A CN 2011102006899 A CN2011102006899 A CN 2011102006899A CN 201110200689 A CN201110200689 A CN 201110200689A CN 102359917 A CN102359917 A CN 102359917A
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Abstract
The invention relates to a device for detecting frictional wear characteristics of magnetorheological fluid under a magnetic field. In a magnetic induction coil of a magnetic generating module of the device, a copper enamelled wire is used as a lead, magnetic conduction low-carbon steel is used as a winding shaft, and an aluminum product is used as a baffle plate, so magnetic loss is reduced effectively, the stability of the operation of the magnetic field is improved, and a detection platform is provided for the evaluation of the frictional wear characteristics of the magnetorheological fluid under the magnetic field. In the device for the frictional wear characteristics of the magnetorheological fluid under the magnetic field, an induction magnetic field which is perpendicular to the motion direction of a friction pair can be formed at a contact point of the friction pair according to test requirements, the variable regulation of the magnetic field can also be realized by changing a value of current inputted to the coil, and the regulation can be performed continuously, so that the condition is provided for inspecting the frictional wear characteristics of the magnetorheological fluid systematically.
Description
Technical field
The invention belongs to magnetorheological materials detection technique field, be specifically related to magnetic flow liquid friction and wear characteristic pick-up unit.
Background technology
At present; Heterogeneous system magnetorheological materials with good magnetorheological performance has obtained using widely in engineering machinery; For this heterogeneous system; Mostly be the hard magnetic particle owing to produce the suspended phase of magnetic effect, these friction of granule polishing machinees will have a strong impact on the serviceable life of magnetorheological device.In addition; Magnetorheological materials has obtained comparatively successful application in the polishing technology field; When workpiece is carried out polishing operation; Thereby often need to regulate continuously the magnetic field size the accurate control of magnetorheological materials enforcement is reached perfect treatment effect, this friction and wear behavior to magnetorheological materials is had higher requirement.Therefore, the friction and wear behavior of no magnetic field of investigation and magnetic field condition magnetic fluid is very important.Search from network, documents and materials and finding see that at present relevant magnetic flow liquid Study on Friction and Wear is also less, and work also rests on the conceptual phase under the no magnetic field mostly.In second international electrorheological meeting in 1989, Lingard and Bullough reported first the tribology research of ER fluid, warn the researcher be engaged in this field when design magnetic flow liquid and ER fluid, do not ignore their greasy property.P. [The effect of particle concentration in a magnetorheological suspension on the performance of a boundary lubricated contact such as L. Wong; Proc. Instn Mech. Engrs Vol.218 Part J:J. Engineering Tribology; 2004,218:251 ~ 263] adopt the test of ring piece to investigate the influence of particle concentration to the magnetic flow liquid tribological property.[Tribological performance of a magneto-rheological suspension such as Bullough; Wear, 2001,247:33 ~ 40] employing ring-piece frictional testing machine; Under fixing conditions such as speed, load, PV value and fraction time; The variation, roughness of having investigated the The friction coefficient granule density of magnetic flow liquid over time, wear scar diameter size and friction block weightlessness have characterized the changes in surface situation of ring, piece with Electronic Speculum.Zhang Pings etc. [stability of magnetic rheological liquid material and lubricity research, functional material, 2005,36 (8): 1192 ~ 1195] have measured the greasy property of iron carbonyi/mineral oil system magnetic flow liquid with the four-ball tester method.[Tribological properties of Mn – Zn – Fe magnetic uids under magnetic eld such as Wang L.J.; Tribology International; 2009; 40:792 ~ 797] through increasing or reduce the number control magnetic induction density of permanent magnet, analyzed the friction and wear behavior influence of magnetic field to manganese-zinc-iron Nanoalloy magnetic fluid.Song's generation far waits [oil plant simulating bench test [M], Beijing: Sinopec publishing house, 2001:151-169] to report the application of friction wear testing machine.4 steel balls in the test oil box with equilateral tetrahedron arrange, on ball be fixed in the chuck and by the main shaft driven rotary, below 3 steel balls be fixed together with oil box, steel ball is applied certain load from bottom to top through the spring loading system.The contact point of 4 steel balls all is immersed in the sample in the process of the test, and the running regular hour, the friction factor in the computer recording experimentation is through the grinding defect diameter of 1 or 3 steel ball in the microscope measurement oil box, the friction and wear behavior of evaluation sample.But the friction-wear test of the heterogeneous system magnetorheological materials of above-mentioned bibliographical information is accomplished under no magnetic field mostly; Have only a fraction of research and design permanent magnet apply magnetic field; And the magnetic field intensity that these devices obtain is less, and the variation of magnetic field intensity can not be regulated continuously.The magnetorheological materials friction and wear behavior of these bibliographical informations detects test and exists following not enough:
The one, experimental result can not reflect the friction and wear behavior of magnetorheological materials comprehensively.Under the action of a magnetic field, the magnetic-particle in the magnetorheological materials is polarized, and arranges, becomes fine again, and the viscosity of magnetic fluid and lubricating condition will great changes will take place, has obviously different when the frictional behaviour of magnetic material is with no magnetic field at this moment.Therefore, the experimental result that obtains under the no magnetic field condition has one-sidedness, can not reflect the tribological property of magnetorheological materials comprehensively.
The 2nd, experiment is very poor with the correlativity of practical applications.Since magnetic fluid often need be under the effect in magnetic field when in engineering, using the competence exertion magnetic rheology effect, the tribological property of the no magnetic field of therefore simple investigation magnetic fluid, the experimental result that obtains and the correlativity of practical applications are very poor.
The 3rd, existing have pick-up unit after the match to have big defective.
(1) is that the intensity in magnetic field is less.There is the magnetic field of pick-up unit after the match to produce by bar magnet; But because excessive clearance between the closed magnetic circuit that the oil box of friction wear testing machine itself forms and oil box and steel ball; Magnetic loss is serious; Friction pair contact point magnetic field intensity only has tens milli teslas, can not reach the test needs far away.
(2) is that the adjusting in magnetic field can not be carried out continuously.The size in magnetic field is to regulate through the distance that changes bar magnet and sample, and the variation in magnetic field is discontinuous.
(3) is that cost of investment is higher.Because costing an arm and a leg of bar magnet causes the overall cost of field generator for magnetic higher.
In view of existing magnetorheological materials friction-wear test present situation, special proposition has the research and development of magnetic flow liquid friction and wear characteristic pick-up unit after the match.The invention of this device; The result had one-sidedness, poor with the practical applications correlativity, existing little, the drawbacks such as magnetic field intensity can not be regulated continuously, cost of investment height of pick-up unit magnetic field intensity during the friction and wear behavior that has solved magnetorheological materials detected; Because advantages such as its design concept advanced person, good operation stability, controllability is high, cost is lower; Testing conditions can be set up effectively, remarkable economic efficiency and good social benefit will be produced with the corresponding testing laboratory of practical engineering application.
Summary of the invention
The objective of the invention is weak point to existing magnetorheological materials rubbing wear pick-up unit; A kind of device that can be used for having magnetic flow liquid friction and wear characteristic detection after the match is provided; Make the rubbing wear of magnetorheological materials detect the more system of testing; The gained test figure has more representativeness, can simulate the advantages such as Service Environment of magnetic fluid preferably, and the rubbing wear that can be widely used in different magnetic materials detects test.
This have after the match that magnetic flow liquid friction and wear characteristic pick-up unit comprises direct current stabilizer, rotary main shaft, magnetic induction coil, oil box and steel ball friction pair.
Said magnetic induction coil is made up of around axle aluminium baffle plate, copper paint envelope curve and mild carbon steel; Said copper paint envelope curve is wrapped in mild carbon steel in a certain order on axle; The coil two ends are fixed by the aluminium baffle plate; Winding wire links to each other with the both positive and negative polarity of direct current stabilizer respectively; By direct current stabilizer is that magnetic induction coil provides DC voltage, comes the magnetic induction density value of control coil generation through the size of current of regulating direct current stabilizer.
Said magnetic induction coil is sleeved on the rotary main shaft of friction wear testing machine; Said magnetic induction coil is in the top of the rotary main shaft of friction wear testing machine; Following steel ball in the steel ball friction pair of friction wear testing machine is fixed in the oil box; Last steel ball in the steel ball friction pair is fixed on the bottom of rotary main shaft; Add the magnetic flow liquid sample in the oil box, go up steel ball in the process of the test and contact with following steel ball and all be immersed in the magnetic flow liquid sample.
Form and the vertical magnetic induction return circuit of steel ball friction pair direction of motion behind the said magnetic induction coil input current, control through the size of current that the direct current stabilizer adjusting is input in the magnetic induction coil in the induction level that steel ball friction pair contact point produces.
The present invention adopts copper paint envelope curve, aluminium baffle plate and mild carbon steel to form magnetic induction coil jointly around axle, is assembled on the rotary main shaft of friction wear testing machine.When electric current passed through coil, the friction pair contact area can produce induced field.Because the rotary main shaft of testing machine is a cast iron materials, is equivalent in magnetic induction coil, insert iron core, can strengthen friction pair contact point magnetic field intensity.
Each assembly synergistic work of magnetic flow liquid friction and wear characteristic pick-up unit is after the match arranged, makes pick-up unit possess following function:
1. can produce magnetic field, for the friction and wear behavior of investigating magnetic fluid has all sidedly been created condition.
2. D.C. regulated power supply is that magnetic field device provides DC voltage, has simplified the magnetic field that produces, and has increased the stability in magnetic field.
3. the magnetic field of friction pair contact point size can arbitrarily be set according to the test needs.
4. the direction that produces magnetic field is vertical with the direction of motion of magnetic fluid, helps accurately estimating the friction and wear behavior of magnetic fluid.
5. but timely adjustment friction pair contact point field strength values is big or small, and this variation can be carried out continuously.
6. magnetic field device has designed the aluminium baffle plate, has reduced magnetic loss.
The present invention is a kind of device that can be used for having magnetic flow liquid friction and wear characteristic detection after the match; Field generator for magnetic wherein adopts the copper paint envelope curve as lead, uses direct current stabilizer that stable voltage is provided, and the non-magnet_conductible material aluminium is as the coil baffle plate; The magnetic conduction low-carbon steel material as coil around axle; Increase the stability that produces magnetic field, reduced magnetic loss, strengthened magnetic field intensity.Through direct current stabilizer, can set and the size of in good time regulating and control magnetic field intensity simultaneously according to the test needs.
Description of drawings
Fig. 1: the one-piece construction figure of the magnetic field generating module of magnetic flow liquid friction and wear characteristic pick-up unit is after the match arranged;
Fig. 2: the work synoptic diagram of magnetic flow liquid friction and wear characteristic pick-up unit is after the match arranged.
Embodiment
Below in conjunction with accompanying drawing and with best embodiment the present invention is done detailed explanation.
Consult Fig. 1, a kind of have after the match that the magnetic field generating module of magnetic flow liquid friction and wear characteristic pick-up unit comprises direct current stabilizer 1; Aluminium baffle plate 2; Copper paint envelope curve 3; Mild carbon steel is around axle 4.
Copper paint envelope curve 3 is wrapped in mild carbon steel in a certain order on axle 4, and the coil two ends are fixing by aluminium baffle plate 2, constitute magnetic induction coil 6, and winding wire links to each other with the both positive and negative polarity of direct current stabilizer 1 respectively.Come the magnetic induction density value of control coil generation through the size of current of regulating direct current stabilizer.Coil is assembled on the friction wear testing machine, can produces magnetic field at the friction pair contact area, the magnetic field size can be regulated continuously.
Consult Fig. 2, have the synoptic diagram of magnetic flow liquid friction and wear characteristic pick-up unit work after the match to comprise: rotary main shaft 5, magnetic induction coil 6, magnetic induction return circuit 7, oil box 8, steel ball friction pair 9.
Friction wear testing machine among the present invention is existing structure; Testing machine as mentioning in the background technology specifically comprises: electric-control board, spindle drive systems, spring loading system, test power moment of friction measuring system, embedded computer measurement and control system (comprising LCD, main frame, acquisition module, control integrated circuit board etc.), friction pair and unit clamp etc.
Claims (1)
1. one kind has magnetic flow liquid friction and wear characteristic pick-up unit after the match, it is characterized in that, comprises direct current stabilizer (1), rotary main shaft (5), magnetic induction coil (6), oil box (8) and steel ball friction pair (9);
Said magnetic induction coil (6) is made up of around axle (4) aluminium baffle plate (2), copper paint envelope curve (3) and mild carbon steel; Said copper paint envelope curve (3) is wrapped in mild carbon steel in a certain order on axle (4); The coil two ends are fixing by aluminium baffle plate (2); Winding wire links to each other with the both positive and negative polarity of direct current stabilizer (1) respectively; For magnetic induction coil (6) DC voltage is provided by direct current stabilizer (1), comes the magnetic induction density value of control coil generation through the size of current of regulating direct current stabilizer;
Said magnetic induction coil (6) is sleeved on the rotary main shaft (5) of friction wear testing machine; Said magnetic induction coil (6) is in the top of the rotary main shaft (5) of friction wear testing machine; Following steel ball in the steel ball friction pair (9) of friction wear testing machine is fixed in the oil box (8); Last steel ball in the steel ball friction pair (9) is fixed on the bottom of rotary main shaft (5); Add the magnetic flow liquid sample in the oil box (8), go up steel ball in the process of the test and contact with following steel ball and all be immersed in the magnetic flow liquid sample;
Form the magnetic induction return circuit (7) vertical behind said magnetic induction coil (6) input current, control through the size of current that direct current stabilizer (1) adjusting is input in the magnetic induction coil (6) in the induction level that steel ball friction pair (9) contact point produces with steel ball friction pair (9) direction of motion.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636429A (en) * | 2012-05-02 | 2012-08-15 | 中国矿业大学 | Friction control method of magnetic micro-nano texture surface and device |
| CN103604725A (en) * | 2013-11-29 | 2014-02-26 | 湘潭大学 | Electrorheological fluid visualization testing stand |
| CN107727947A (en) * | 2017-09-30 | 2018-02-23 | 南京航空航天大学 | A kind of device that DC electric field intensity is detected using ER fluid |
| CN109632629A (en) * | 2019-01-22 | 2019-04-16 | 重庆邮电大学 | Controllable coefficient of rolling friction detection device and detection method based on magnetosensitive rubber |
| CN110520224A (en) * | 2017-02-21 | 2019-11-29 | 托达康机床防护有限公司 | For cleaning the wiper with wear indicating device on lathe surface |
| CN113237784A (en) * | 2021-03-22 | 2021-08-10 | 安徽工程大学 | Device and method for testing frictional wear performance of magnetic fluid |
| CN114062246A (en) * | 2021-11-22 | 2022-02-18 | 安徽工程大学 | Friction-wear rotation experimental device for magnetic fluid lubrication and use method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201464312U (en) * | 2009-03-25 | 2010-05-12 | 河南科技大学 | Magnetic field control device for friction and abrasion test |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201464312U (en) * | 2009-03-25 | 2010-05-12 | 河南科技大学 | Magnetic field control device for friction and abrasion test |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636429A (en) * | 2012-05-02 | 2012-08-15 | 中国矿业大学 | Friction control method of magnetic micro-nano texture surface and device |
| CN103604725A (en) * | 2013-11-29 | 2014-02-26 | 湘潭大学 | Electrorheological fluid visualization testing stand |
| CN103604725B (en) * | 2013-11-29 | 2016-04-20 | 湘潭大学 | A kind of electrorheological fluid Visualization platform |
| CN110520224A (en) * | 2017-02-21 | 2019-11-29 | 托达康机床防护有限公司 | For cleaning the wiper with wear indicating device on lathe surface |
| CN107727947A (en) * | 2017-09-30 | 2018-02-23 | 南京航空航天大学 | A kind of device that DC electric field intensity is detected using ER fluid |
| CN107727947B (en) * | 2017-09-30 | 2019-12-10 | 南京航空航天大学 | Device for detecting DC electric field intensity by using electrorheological fluid |
| CN109632629A (en) * | 2019-01-22 | 2019-04-16 | 重庆邮电大学 | Controllable coefficient of rolling friction detection device and detection method based on magnetosensitive rubber |
| CN109632629B (en) * | 2019-01-22 | 2021-08-13 | 重庆邮电大学 | Controllable rolling friction coefficient detection device and detection method based on magnetic-sensitive rubber |
| CN113237784A (en) * | 2021-03-22 | 2021-08-10 | 安徽工程大学 | Device and method for testing frictional wear performance of magnetic fluid |
| CN114062246A (en) * | 2021-11-22 | 2022-02-18 | 安徽工程大学 | Friction-wear rotation experimental device for magnetic fluid lubrication and use method thereof |
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Application publication date: 20120222 |