CN1730970A - Magnetorheological intelligent vibration damper for minisize automobile - Google Patents
Magnetorheological intelligent vibration damper for minisize automobile Download PDFInfo
- Publication number
- CN1730970A CN1730970A CN 200510060298 CN200510060298A CN1730970A CN 1730970 A CN1730970 A CN 1730970A CN 200510060298 CN200510060298 CN 200510060298 CN 200510060298 A CN200510060298 A CN 200510060298A CN 1730970 A CN1730970 A CN 1730970A
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- Prior art keywords
- work cylinder
- piston
- cylinder barrel
- vibration damper
- base
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
Abstract
The present invention discloses one kind of intelligent magnetically rheologic damper for mini car. There are air membrane and pedestal forming combined energy storing air bag inside the hole on one end of the work cylinder, non-return valve installed in the screw hole on the pedestal, magnetically rheologic material filled inside the work cylinder divided into two work cavities with the piston, annular damping passage comprising the outer wall of the piston and the inner wall of the work cylinder and connecting the two cavities in the work cylinder, top cap to seal the other end of the work cylinder, piston with exciting winding, three guide blocks of non-magnetic material on the outer surface of the piston. The present invention has less magnetic leakage, raised magnetic utilization rate, simple installation, long service life, good damping characteristic and simple and compact structure. The damper may be matched with controller for automatic regulation of damping characteristic.
Description
Technical field
The present invention relates to vehicle shock-absorbing device, especially relate to a kind of magnetorheological intelligent vibration damper for minisize automobile.
Technical background
The damping characteristic of automotive suspension is the principal element that influences automobile ride and operability, and in order to obtain good smoothness and tire grounded capacity, for different condition of road surface, automobile load and travelling speed, desired damping force also is not quite similar.Traditional automobile suspension system is to design by certain specific pavement behavior and travel condition of vehicle, and the characteristic of its vibration damper is nonadjustable.When pavement behavior and travel condition of vehicle off-design conditions, fixedly the effectiveness in vibration suppression of the suspension system of damping characteristic will greatly reduce, and will be light then the travelling comfort of seat is taken advantage of in influence. and heavy then influence traffic safety.Intelligent vibration damper can be regulated the damping characteristic of automotive suspension in real time according to the concrete condition of operating mode, for guaranteeing that the good rideability of automobile is extremely important.
Magnetorheological phenomenon is found in 1948 that by Jacob Rabinow its concise and to the point mechanism is that its viscosity can change along with changes of magnetic field magnetorheological materials (Magnetorheological Fluids is called for short MRF) under the action of a magnetic field.Magnetic flow liquid is made of the magnetizable particles and the stabilizer that are suspended in the carrier fluid.The average diameter of magnetic flow liquid particle is in 1～10 mu m range.During no the action of a magnetic field, particle freely is dispersed in the carrier fluid.When externally-applied magnetic field is done the time spent, these particles attract each other under the action of a magnetic field, form the netted chain of particle along the magnetic line of force between the N utmost point and the S utmost point between two utmost points, thus the effect that has produced shearing stress.Outward appearance shows as the characteristic of thickness, and its viscosity can the stepless variation with changes of magnetic field.To response time in magnetic field between 0.1～1ms, and magnetic field is strong more, particle chain is stable more, anti-shear ability is strong more.When the shearing force that adds was lower than its transmission capacity, the magnetic flow liquid of thickness was equivalent to the solid of toughness; When external force was crossed its shear resistance, tough gonosome is then cut off to begin to flow.After effect magnetic field disappears, recover initial free-flowing again immediately.Magnetic flow liquid has many outstanding advantages: (1) low energy consumption, low cost; (2) dynamic range is wide, the frequency response height; (3) adaptive temperature wide ranges (40 ℃～150 ℃); (4) rheological properties do not made and use in impurity effect, sealing is easily.
Magneto-rheological vibration damper is a kind of novel intelligence structure, and mainly the viscosity by magnetic field control magnetic flow liquid realizes that damping force is adjustable, has characteristics such as reliable performance, simple in structure and adaptability are strong.Vibration damping equipment patent at magneto-rheological fluid comprises that mainly application number is a kind of automobile suspension system magnetorheological damping device of 200410079249.2 now; the patent No. is 01245646.2 novel MR fluid shock absorber; application number is 03132633.1 the two outstretch pole magnetorheological fluid dampers of built-in air sac type; application number is 02817550.6 MR damper; application number is 01113535.2 the linear magnetorheologic liquid damper that is used for vehicle etc.; but they are in the structural design of magneto-rheological vibration damper; improve the magnetic field utilization ratio and how to use simple structure to guarantee that the direct key issues of the damping characteristic of vibration damper that determine such as even distribution of annular damping hole all have much room for improvement with regard to the leakage field that how to reduce structure, how making the design and installation of energy storage air bag in addition simply effectively also is a problem demanding prompt solution.
Summary of the invention
The object of the present invention is to provide a kind of magnetorheological intelligent vibration damper for minisize automobile, it reduces leakage field and improves the magnetic field utilization ratio, and it is simple in structure effective to adopt the interior guide structure of combined type energy storage air bag and piston to make.
The technical solution used in the present invention is: it comprises work cylinder barrel, permeability magnetic material piston, top cover, air diaphragm and base.Dress air diaphragm is connected with the end of base with the work cylinder barrel in the hole of work cylinder barrel one end, and air diaphragm and base cavity pocket form knockdown energy storage air bag, has on the bottom surface of base the one-way valve tapped hole is installed; Be full of magnetorheological materials in the work cylinder barrel, be separated into two active chambers with piston; Piston outer wall forms the ring-type damp channel with the work inner wall of cylinder, connects two chambeies up and down of work cylinder barrel; The work cylinder barrel the other end compresses sealing with top cover; Described piston one end has annular groove, and the annular groove opposite end surface is the plane of inclination, twines field coil in the annular groove; Three guide runners made from non-magnet_conductible material also are embedded in outer surface of piston for 120 ° with the interval respectively.
Described air diaphragm is shallow bowl dish shape, and its edge is a cylindrical toroidal, and material is a neoprene.
The useful effect that the present invention has is:
1) reduce leakage field and improve the magnetic field utilization ratio: at first adopt the plane of inclination owing to twine the both ends of the surface of the groove of field coil on the piston body, by finite element numerical analysis and evidence, such structure can obviously reduce leakage field and improve the magnetic field utilization ratio.Secondly piston all adopts the guide runner of inlaying on high permeability material and the piston to adopt non-magnet material with the work cylinder barrel, and magnetic field is all passed through from annular damping hole, improves sharp magnetic field utilization ratio.Cylinder cap and fastening piece thereof and base and fastening piece thereof all adopt non-magnet material once more, can not form magnet short-cut path like this and can reduce magnetic loss significantly;
2) adopt combined type energy storage air bag install simple and the life-span long: owing to having adopted the mode that combines by air diaphragm and base cavity pocket, make the installation of air bag very convenient.The air diaphragm adopts neoprene to make and because base cavity pocket makes the air bag indefatigability to the additional of bag volume, thereby has increased the life-span;
3) damping characteristic is good and simple and compact for structure: owing to adopted guide runner, can guarantee that like this piston can both form uniform damping hole with the clutch release slave cylinder tube at any state, make the damping characteristic of vibration damper become good.Guide runner be inlay uniformly with piston body on, therefore make structure simple relatively a lot.
This vibration damper is not adding under the situation of controlling electric current, because the viscosity property of magnetorheological materials can produce the effect the same with traditional vibration damper equally, mix controller and then can regulate damping characteristic automatically, realize the effect of minicar intelligent vibration damping according to actual road conditions.
Description of drawings
Fig. 1 is the structural principle sectional drawing of magnetorheological intelligent vibration damper for minisize automobile;
Fig. 2 is the piston structure schematic representation;
Fig. 3 is the guide runner structural representation;
Fig. 4 is an air film chip architecture schematic representation;
Fig. 5 is a clutch release slave cylinder barrel structure schematic representation;
Fig. 6 is the understructure schematic representation;
Fig. 7 is the cylinder cap structural representation;
Fig. 8 is a magnetorheological intelligent vibration damper for minisize automobile working principle schematic representation.
Among the figure: 1, one-way valve, 2, base, 2.1, tapped hole, 2.2, the groove of semi-circular section, 3, the air diaphragm, 4, bolt, 5, packing ring, 6, the work cylinder barrel, 6.1, the circular groove of rectangular cross-section, 6.2, the groove of semi-circular section, 7, stifle, 8, piston, 8.1, center hole, 8.2, the plane of inclination, 8.3, groove, 8.4, aperture, 8.5, aperture, 8.6, oblique through hole,, 9, field coil, 10, guide runner, 11, screw, 12, seal ring, 13, seal ring, 14, cylinder cap, 15, packing ring, 16, cylinder cap, 16.1, screw hole, 16.2, through hole, 16.3, liquid filling hole, 17, upper binding head, 18, bolt, 19, magnetorheological materials.
Embodiment
Shown in Fig. 1 (a), Fig. 1 (b), at first piston 8 is installed in the work cylinder barrel 6, and work cylinder barrel 6 is divided into two active chambers, and fills with magnetorheological materials in work cylinder barrel 6.Three guide runners 10 of piston 8 by being embedded in piston 8 outsides are the location in work cylinder barrel 6, and the inboard that makes work cylinder barrel 6 and the outside of piston 8 form the uniform ring shape damping hole of 1.5 millimeters thick, two active chambers of connection work cylinder barrel 6.The upper end of work cylinder barrel 6 is sealed by cylinder cap 16, and wherein piston rod is from the center hole of cylinder cap 16 outside through work cylinder barrel 6.The lower end of work cylinder barrel 6 is energy storage air bags, and it is combined by air diaphragm 3 and base 2.Air diaphragm 3 is put between work cylinder barrel 6 and the base 2, with bolt 4 and packing ring 5 they is carried out pretension then and makes work cylinder barrel 6 and air diaphragm 3 and base 2 compress sealing with air diaphragm 3.After treating that other assembly installs substantially, install connecting head 17 respectively at the afterbody of piston rod head and base 2.
Shown in Fig. 1 (a), Fig. 1 (b), Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), Fig. 3 (a), Fig. 3 (b), this piston 8 adopts the manufacturing of DT4 ingot iron to form.Open an annular recess on the piston body, be used for twining field coil 9, two rear line heads and introduce piston center hole 8.1, finally lead to the vibration damper outside by oblique through hole 8.6 by aperture 8.4 and aperture 8.5.After coil winding finished, piston center hole 8.1 usefulness stifles 7 stopped up.The both ends of the surface of pistion recess are processed into plane of inclination 8.2.The three road grooves 8.3 of milling vertically are in order to inlay guide runner 10 as shown in Figure 3 on the piston body, and guide runner 10 usefulness screws 11 are fastening, need be ground to standard measure after installing, and piston body and work inner wall of cylinder can be moved freely.
As Fig. 1 (a), Fig. 1 (b), Fig. 4, Fig. 5, Fig. 6 (a), Fig. 6 (b), shown in Figure 7, the upper end of the lower end of work cylinder barrel 6 shown in Figure 5 and base 2 shown in Figure 6 has the groove 6.1,2.2 of semi-circular section, they are clipped in the middle air diaphragm 3 shown in Figure 4, compress sealing by bolt 4 and packing ring 5 then, air diaphragm 3 has been formed the energy storage air bag with the cavity of base 2 like this.The bottom surface of base 2 has tapped hole 2.1, is used for installing one-way valve 1, is convenient to pressurize to airbag aeration.The upper end of work cylinder barrel 6 has the circular groove 6.2 of rectangular cross-section, is used for installing seal ring 12.Cylinder cap 16 shown in Figure 7 is connected with packing ring 15 by screw hole 16.1 usefulness bolts 14 and compresses with work cylinder barrel 6.Make a call to two liquid filling holes 16.3 on the cylinder cap 16, seal with bolt 18 after fluid injection finishes.A through hole 16.2 is opened at the center of cylinder cap, and processes an annular groove in order to seal ring 13 to be installed in through hole 16.2.
As shown in Figure 8, the working principle of this magnetorheological intelligent vibration damper for minisize automobile is as follows: at first the vibration of automobile chassis makes the sensor that is installed on the automobile chassis produce signal, by analog to digital conversion circuit (A/D) signal of sensor is gathered then, controller carries out analytical calculation and determines the optimal damping power of the required output of this moment vibration damper according to the model of vibration of automobile the oscillating signal that A/D gathered, and the damping force model according to vibration damper can calculate the required conduction current size of field coil easily subsequently.To D/A converting circuit D/A, D/A converts digital signal to analogue signal to controller, makes this control signal by power amplification circuit then according to the parameter output corresponding control signal of calculating gained, makes the conduction current of field coil obtain optimum value at last.After the electric current of field coil changed, the magnetic intensity that is produced by coil changed thereupon, thereby has caused the viscosity respective change of magnetic flow liquid in the damping hole, had finally caused the change of vibration damper output damping force, realized the effect of automobile intelligent vibration damping.
Controller can adopt the stronger single-chip microcomputer of DSP, ARM or other Processing capacities etc., adopts digital control method, can make the algorithm in the controller abundanter.
Claims (2)
1. magnetorheological intelligent vibration damper for minisize automobile, it is characterized in that: it comprises work cylinder barrel (6), permeability magnetic material piston (8), top cover (16), air diaphragm (3) and base (2); Dress air diaphragm (3) is connected with the end of base (2) with work cylinder barrel (6) in the hole of work cylinder barrel (6) one ends, air diaphragm (3) forms knockdown energy storage air bag with base (2) cavity, has on the bottom surface of base (2) one-way valve (1) tapped hole (2.1) is installed; Be full of magnetorheological materials (19) in the work cylinder barrel (6), be separated into two active chambers with piston (8); Piston (8) outer wall forms the ring-type damp channel with work cylinder barrel (6) inwall, connects two chambeies up and down of work cylinder barrel (6); Work cylinder barrel (6) the other end compresses sealing with top cover (16); Described piston (8) one end has annular groove, and the annular groove opposite end surface is the plane of inclination, twines field coil (9) in the annular groove; Three guide runners made from non-magnet_conductible material (10) also are embedded in piston (8) outer surface for 120 ° with the interval respectively.
2. magnetorheological intelligent vibration damper for minisize automobile according to claim 1 is characterized in that: described air diaphragm (3) is shallow bowl dish shape, and its edge is a cylindrical toroidal, and material is a neoprene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100602986A CN100340794C (en) | 2005-08-04 | 2005-08-04 | Magnetorheological intelligent vibration damper for minisize automobile |
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| CNB2005100602986A CN100340794C (en) | 2005-08-04 | 2005-08-04 | Magnetorheological intelligent vibration damper for minisize automobile |
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| CN1730970A true CN1730970A (en) | 2006-02-08 |
| CN100340794C CN100340794C (en) | 2007-10-03 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915281A (en) * | 2010-07-19 | 2010-12-15 | 谭和平 | Single-rod magnetorheological damper with one-way channel |
| CN102121509A (en) * | 2010-12-09 | 2011-07-13 | 重庆大学 | Magnetorheological damper with annular and disc-shaped liquid flow resistance channels simultaneously |
| CN103291827A (en) * | 2013-05-14 | 2013-09-11 | 吉林大学 | Valve-plate-rigidity-adjustable damper piston |
| CN103511546A (en) * | 2013-10-22 | 2014-01-15 | 袁显举 | Automobile magneto-rheological absorber based on multistage circumferential flow mode |
| CN105909722A (en) * | 2016-06-17 | 2016-08-31 | 江苏大学 | Damping-adjustable shock absorber using magnetorheological fluid |
| CN106979271A (en) * | 2017-05-04 | 2017-07-25 | 湘潭大学 | A kind of novel piston inner flow passage magneto-rheological vibration damper |
| CN107314077A (en) * | 2017-07-13 | 2017-11-03 | 盐城市步高汽配制造有限公司 | A kind of double-cylinder type magneto-rheological vibration damper of inside and outside twin coil |
| CN108361311A (en) * | 2018-01-23 | 2018-08-03 | 长安大学 | A kind of mode MR elastomer damper |
| CN108533663A (en) * | 2018-05-06 | 2018-09-14 | 北京工业大学 | A kind of lateral resisting list rod shearing valve type magneto-rheological damper |
| CN111880439A (en) * | 2020-07-10 | 2020-11-03 | 清华大学 | Method and apparatus for controlling current of magnetorheological damper |
| CN112360915A (en) * | 2020-08-20 | 2021-02-12 | 武汉理工大学 | Novel magnetorheological fluid shock absorber |
| CN115324982A (en) * | 2022-08-26 | 2022-11-11 | 中国人民解放军海军工程大学 | Self-adaptive hydraulic muffler device |
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| EP1013963B1 (en) * | 1992-06-18 | 2003-08-27 | Lord Corporation | Magnetoriheological fluid device |
| US6336535B1 (en) * | 2001-03-14 | 2002-01-08 | Delphi Technologies, Inc. | Magneto-rheological damper with dual flux ring spacer |
| US20020139624A1 (en) * | 2001-03-30 | 2002-10-03 | Jensen Eric Lee | Twin-tube magnetorheological damper |
| CN2551806Y (en) * | 2002-06-26 | 2003-05-21 | 重庆大学 | Magnetic rheological liquid vibration-damper for automobile |
| CN1260491C (en) * | 2002-12-26 | 2006-06-21 | 邱玲 | Single-stage electromagnetic rheological flow damper |
| CN100371623C (en) * | 2004-05-28 | 2008-02-27 | 重庆大学 | Magnetorheological suspensions damping device for automobile suspension system |
| CN2816483Y (en) * | 2005-08-04 | 2006-09-13 | 浙江大学 | Minisize-automatic magnetic-current variation intelligent shock-adsorption device |
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2005
- 2005-08-04 CN CNB2005100602986A patent/CN100340794C/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915281A (en) * | 2010-07-19 | 2010-12-15 | 谭和平 | Single-rod magnetorheological damper with one-way channel |
| CN102121509A (en) * | 2010-12-09 | 2011-07-13 | 重庆大学 | Magnetorheological damper with annular and disc-shaped liquid flow resistance channels simultaneously |
| CN102121509B (en) * | 2010-12-09 | 2013-01-23 | 重庆大学 | Magnetorheological damper with annular and disc-shaped liquid flow resistance channels simultaneously |
| CN103291827A (en) * | 2013-05-14 | 2013-09-11 | 吉林大学 | Valve-plate-rigidity-adjustable damper piston |
| CN103511546A (en) * | 2013-10-22 | 2014-01-15 | 袁显举 | Automobile magneto-rheological absorber based on multistage circumferential flow mode |
| CN103511546B (en) * | 2013-10-22 | 2015-06-10 | 袁显举 | Automobile magneto-rheological absorber based on multistage circumferential flow mode |
| CN105909722A (en) * | 2016-06-17 | 2016-08-31 | 江苏大学 | Damping-adjustable shock absorber using magnetorheological fluid |
| CN106979271A (en) * | 2017-05-04 | 2017-07-25 | 湘潭大学 | A kind of novel piston inner flow passage magneto-rheological vibration damper |
| CN107314077A (en) * | 2017-07-13 | 2017-11-03 | 盐城市步高汽配制造有限公司 | A kind of double-cylinder type magneto-rheological vibration damper of inside and outside twin coil |
| CN108361311A (en) * | 2018-01-23 | 2018-08-03 | 长安大学 | A kind of mode MR elastomer damper |
| CN108533663A (en) * | 2018-05-06 | 2018-09-14 | 北京工业大学 | A kind of lateral resisting list rod shearing valve type magneto-rheological damper |
| CN111880439A (en) * | 2020-07-10 | 2020-11-03 | 清华大学 | Method and apparatus for controlling current of magnetorheological damper |
| CN111880439B (en) * | 2020-07-10 | 2021-06-29 | 清华大学 | Method and apparatus for controlling current of magnetorheological damper |
| CN112360915A (en) * | 2020-08-20 | 2021-02-12 | 武汉理工大学 | Novel magnetorheological fluid shock absorber |
| CN112360915B (en) * | 2020-08-20 | 2022-02-15 | 武汉理工大学 | Novel magnetorheological fluid shock absorber |
| CN115324982A (en) * | 2022-08-26 | 2022-11-11 | 中国人民解放军海军工程大学 | Self-adaptive hydraulic muffler device |
| CN115324982B (en) * | 2022-08-26 | 2024-03-26 | 中国人民解放军海军工程大学 | Self-adaptive hydraulic silencing device |
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