CN103591209A - Seven-level adjustable reciprocating type electrorheological fluid damper - Google Patents
Seven-level adjustable reciprocating type electrorheological fluid damper Download PDFInfo
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Abstract
A seven-level adjustable reciprocating type electrorheological fluid damper mainly comprises a positive-pole conducting wire, a negative-pole conducting wire, a positive-pole piston cylinder cover, a negative-pole piston cylinder cover, positive-pole conducting rubber, negative-pole conducting rubber, a piston rod, an insulating piston cylinder, a positive pole, a negative pole, a backflow control path, a small piston, a middle piston, a large piston and electrorheological fluid. The positive-pole conducting rubber and the negative-pole conducting rubber replace sealing materials and play a role in sealing and conducting. Installation forms of the small piston, the middle piston and the large piston are determined by borne damping force, wherein when the damping force is large, stress is not clear, and movement speed is high, the dual-piston or three-piston form is adopted; when the damping force is small, the single-piston form is adopted. The backflow control path replaces a throttling control valve, no external electric field exists, the electrorheological fluid bears the force and flows between the positive pole and the negative pole through the backflow control path, and the seven-level adjustable reciprocating type electrorheological fluid damper is a hydraulic damper; when an external electric field is applied and shearing efficiency is high, apparent viscosity of the electrorheological fluid of the backflow control path changes, the section area of the backflow control path becomes smaller, the backflow control path is even blocked completely, and the electrorheological fluid effectively controls an engineering system by proving shearing force and extruding force.
Description
Technical field
The present invention relates to a kind of reciprocating damper, particularly a kind of by three pistons realize seven grades adjustable, in insulation, have the reciprocating current liquescent dampers that backflow control access substitutes throttling control valve on piston cylinder, belong to vibration engineering technical field.
Background technique
Electrorheological fluid is to be dispersed in by the polarizable solid particle of micron dimension the suspension forming in the nonpolar insulation impregnant of low viscosity, can comprise starch, silica flour, aluminium powder, titanium dioxide, zeolite, Inorganic Non-metallic Materials, organic semiconducting materials, semiconducting polymer's material, stabilizer or surface active agent etc.While not applying electric field, electrorheological fluid is similar to common Newtonian fluid character; Once and extra electric field, the fluid properties of electrorheological fluid can occur sharply to change moment, rheological properties changes along with the variation of electric field strength, apparent viscosity is the increase of the order of magnitude, shows the character of solid; Once and electric field disappears, electrorheological fluid again can reinstatement.Electrorheological fluid has the features such as controlled flow characteristic, viscosity characteristics, consolidation effect, response fast, reversibility, thereby has obtained application in fields such as automobile, machinery, buildings, becomes an important branch of current intellectual material research.
Current liquescent damper is the important directions that electric current becomes application technology, relate to all many-sides such as theory analysis, structural design, performance evaluation and experimental test, the emphasis of research is to select suitable electrorheological fluid, damper structure reasonable in design, realize electrorheological fluid rapidly, continuously, reversible variation.Compare with traditional hydraulic damper, current liquid damper is without the long-pending liquid flow control valve of variable cross section, and simple in structure, volume is little; In controlling method, traditional hydraulic damper needs the variation of complicated winding machine liquid flow control valve sectional area, and current liquescent damper only needs extra electric field can change damping, and energy consumption is little, and damping force is larger.Current liquescent damper dynamic range is wider, frequency response is higher, adaptive surface is wider, has overcome traditional problems such as passive type damper bad adaptability, active spoiler control algorithm complexity and stability, is the desirable replacement device of passive type, active control unit.
At present, the research of relevant current liquid damper both at home and abroad mainly concentrates on structural design aspect, has researched and developed various current liquescent dampers, can conclude and be divided into three major types: Shear-mode damper, flow pattern damper, mixed mode damper.As a whole, the application of electro-rheological technology engineering application patent mainly concentrates on the countries such as the U.S., Japan, Germany, France, Canada; The electric current of China becomes application technical research and starts under the participation of the eighties middle and later periods ， Chinese Academy of Sciences, Tsing-Hua University, Northwestern Polytechnical University, Shanghai Communications University, Xi'an Communications University, through development and the accumulation of nearly 30 years, has established certain basis.In prior art, in order to overcome, electrorheological fluid surrender shearing stress is on the low side, rheology efficiency problem on the low side under high shear rate, often in electro-rheological fluid damper, has designed pilot valve, throttling control valve etc., causes damper volume large, complex structure, the problem such as structure is immutable.
Summary of the invention
In order to overcome deficiency and the defect of prior art, the present invention proposes a kind of by three pistons realize seven grades adjustable, in insulation, have the reciprocating current liquescent dampers that backflow control access substitutes throttling control valve on piston cylinder.
The present invention solves the problems of the technologies described above the technological scheme adopting to be:
A grade adjustable reciprocating current liquescent damper, comprises cathode conductor, negative pole piston cylinder cover, piston rod, insulation piston cylinder, negative pole, electrorheological fluid, positive pole, anodal piston cylinder cover, positive wire, also comprise backflow control access, small piston, middle piston, large piston; Wherein, negative pole and just very cylindrical structure; Negative pole piston cylinder cover, anodal piston cylinder cover have the aperture of drawing for cathode conductor, positive wire; Negative pole piston cylinder cover, negative pole, positive pole, anodal piston cylinder cover, small piston, middle piston, large piston all have the center hole passing for piston rod; Negative pole, negative pole piston cylinder cover, successively through after piston rod, are bolted to connection by negative pole piston cylinder cover and insulation piston cylinder; Anodal, anodal piston cylinder cover, successively through after piston rod, is bolted to connection by anodal piston cylinder cover and insulation piston cylinder; Any one in small piston, middle piston, large piston or two or three are connected with piston rod that to realize seven grades of reciprocating current liquescent damper adjustable arbitrarily; Described backflow control access is opened on insulation piston cylinder, and is communicated with negative pole and positive pole.Backflow control access is opened on insulation piston cylinder, and during without extra electric field, the electrorheological fluid process backflow control access realization in insulation piston cylinder is flowed mutually negative pole, positive interpolar, thereby realizes the function of conventional hydraulic damper; While having extra electric field, electrorheological fluid in the backflow control access of flowing through forms chain thing or decorating film, and the sectional area of the control access that makes to reflux diminishes or sealing completely, thereby realizes the effect of throttling control valve.
Further, also comprise negative pole conductive rubber, anodal conductive rubber, described negative pole conductive rubber is arranged between negative pole piston cylinder cover and negative pole, described anodal conductive rubber is arranged between anodal piston cylinder cover and positive pole, and all has the center hole passing for piston rod on described negative pole conductive rubber, anodal conductive rubber.
Further, described negative pole is made by conductive material with anodal, and described negative pole piston cylinder cover, anodal piston cylinder cover are made by insulating material, and described negative pole conductive rubber, anodal conductive rubber are after being under pressure, to have the seal arrangement of electric action.Negative pole conductive rubber, anodal conductive rubber have substituted sealing material, and Packed effect has again the effect of conduction after being under pressure.
Further, also comprise flat key, piston rod by described flat key and small piston, middle piston, large piston any one or two or three are connected arbitrarily.
Further, determine the installation form of small piston, middle piston, large piston according to the size of damping force, seven grades of realizing reciprocating current liquescent damper are adjustable.The stressed situation that needed damping force is larger or possible in reality is not clear, can consider to adopt the installation form of double-piston, three pistons, small piston and middle piston or middle piston and large piston or large piston and small piston or small piston, middle piston and large piston are installed simultaneously; And required damping force hour, can consider to adopt single piston form in the reality, small piston or middle piston or large piston are only installed.
Further, determine the installation form of small piston, middle piston, large piston according to the size of the movement velocity of the structure of vibration to be controlled, seven grades of realizing reciprocating current liquescent damper are adjustable.When the movement velocity of the structure of vibration to be controlled is slower, can consider to adopt the installation form of single piston; When the movement velocity of the structure of vibration to be controlled is very fast, be the electric rheological effect improving under high shear rate, can consider to adopt the installation form of double-piston, three pistons.
Technological scheme of the present invention has following beneficial effect:
Backflow control access mainly contains four aspect effects, and one, backflow control access substituted throttling control valve etc., make that designed damper structure is simple, volume is little.During two, without extra electric field, when piston rod moves in piston cylinder, extruding electrorheological fluid realizes mutually flowing between both positive and negative polarity through backflow control access, thereby realizes the function of conventional hydraulic damper.Three, when extra electric field, electrorheological fluid generation rheology; The electrorheological fluid apparent viscosity of backflow control access changes, form chain thing or decorating film, the sectional area of backflow control access diminishes and seals even completely, realizes the effect of throttling control valve, make electrorheological fluid that larger shearing force and extruding force is provided, thus the effectively vibration of Control Engineering system.Four,, under the situation of extra electric field, high shear rate, in piston cylinder, the rheological effect of electrorheological fluid dies down, and effective shear resistance cannot be provided, and can only lean on the extruding force of electrorheological fluid that damping force is provided; And in the electrorheological fluid of backflow control access, be not subject to the impact of high shear rate, and there is rapidly electric rheological effect, make that passage sections is long-pending to diminish until sealing completely; The change of backflow control access and then cause electrorheological fluid cannot effectively realize mutually flowing between both positive and negative polarity, thus the squeezed air-damping power that electrorheological fluid provides increased; And large damping force can further reduce shearing rate, along with the reduction of shearing rate, the rheological effect of electrorheological fluid strengthens to some extent, and its apparent viscosity increases, and the shearing force that can provide and extruding force increase; So can reach the object of the vibration of effective Control Engineering system under high shear rate situation.
The present invention has improved the configuration flexibility of damper, under low surrender shearing stress, high shear rate situation, has improved electric rheological effect, has increased the damping force that damper can provide, and has higher economic benefit and social benefit.
Accompanying drawing explanation
Accompanying drawing is the structural representation of seven grades of adjustable reciprocating current liquescent dampers.
In figure, 1 is cathode conductor, and 2 is negative pole piston cylinder cover, 3 is piston rod, and 4 is negative pole conductive rubber, and 5 is insulation piston cylinder, 6 is negative pole, and 7 is backflow control access, and 8 is small piston, 9 is middle piston, and 10 is large piston, and 11 is electrorheological fluid, 12 is anodal, and 13 is anodal conductive rubber, and 14 is anodal piston cylinder cover, 15 is positive wire, and 16 is flat key.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the invention is further described.
As shown in the figure, the present invention mainly comprises: cathode conductor 1, negative pole piston cylinder cover 2, piston rod 3, negative pole conductive rubber 4, insulation piston cylinder 5, negative pole 6, backflow control access 7, small piston 8, middle piston 9, large piston 10, electrorheological fluid 11, positive pole 12, anodal conductive rubber 13, anodal piston cylinder cover 14, positive wire 15, flat key 16.Negative pole 6 is all cylindrical bodys of being made by conductive material with anodal 12.On insulation piston cylinder 5, have electrorheological fluid 11 backflow control access 7, backflow control access 7 is communicated with negative pole 6 and anodal 12 respectively.Small piston 8, middle piston 9, large piston 10 all have the center hole being arranged on piston rod 3.Negative pole piston cylinder cover 2, anodal piston cylinder cover 14 are made by insulating material, and have the aperture of drawing for cathode conductor 1, positive wire 15.Negative pole piston cylinder cover 2, negative pole conductive rubber 4, negative pole 6, positive pole 12, anodal conductive rubber 13, anodal piston cylinder cover 14 all have the circular hole for piston rod 3 motions.After piston rod 3 is connected with small piston 8, middle piston 9, large piston 10 by flat key 16, through piston cylinder 5; After cathode conductor 1 is affixed with negative pole conductive rubber 4, through negative pole piston cylinder cover 2; Negative pole 6, negative pole conductive rubber 4, negative pole piston cylinder cover 2 through after piston rod 3, are bolted to connection by negative pole piston cylinder cover 2 and piston cylinder 5 successively.Electrorheological fluid 11 is injected to piston cylinder 5.After positive wire 15 is affixed with anodal conductive rubber 13, through anodal piston cylinder cover 14; Positive pole 12, anodal conductive rubber 13, anodal piston cylinder cover 14, successively through after piston rod 3, are bolted to connection with piston cylinder 5 by anodal piston cylinder cover 14.
During application, insulation piston cylinder 5 is connected with the matrix phase of engineering system, and piston rod 3 is connected with the structure of vibration to be controlled in engineering system; The size of the damping force of bearing according to damper determines the installation form of small piston 8, middle piston 9, large piston 10, flat key 16.The stressed situation that needed damping force is larger or possible in reality is not clear, can consider to adopt the installation form of double-piston, three pistons, small piston 8 and middle piston 9 or middle piston 9 and large piston 10 or large piston 10 and small piston 8 or small piston 8, middle piston 9 and large piston 10 are installed simultaneously; And required damping force hour, can consider to adopt single piston form in the reality, small piston 8 or middle piston 9 or large piston 10 are only installed.When the movement velocity of the structure of vibration to be controlled is slower, can consider to adopt the installation form of single piston; When the structure motion speed of vibration to be controlled, be the electric rheological effect improving under high shear rate, can consider to adopt the installation form of double-piston, three pistons.
When 15 of cathode conductors 1, positive wire are during without extra electric field, negative pole 6, anodal 12 no-voltages produce, when now this damper is subject to active force, piston rod 3 promotes small piston 8, middle piston 9, piston 10 moves in piston cylinder 5 greatly, electrorheological fluid 11 realizes negative pole 6, anodal 12 mutually flow by backflow control access 7, and the effect of hydraulic damper has been brought into play in this invention.When extra electric field is at cathode conductor 1, during 15 of positive wires, negative pole 6, anodal 12 produce voltage, voltage concentrated area acts on magnetic flow liquid 11, under voltage effect, the rapid class of electrorheological fluid 11 is solidified, the mobility of electrorheological fluid 11 is weakened, form chain thing or decorating film, the sectional area of backflow control access 7 diminishes and seals even completely, the shearing resistance of electrorheological fluid 11 and anti-pressure ability improve, it is small piston 8, middle piston 9, the damping force that large piston 10 motions are subject to increases, according to engineering working control voltage, make the apparent viscosity of electrorheological fluid 11 meet corresponding damping force requirement, thereby reach the object of the Oscillation Amplitude of Control Engineering structure.When the movement rate of extra electric field and vibrational structure to be controlled is very fast, in the rheological effect of the electrorheological fluid 11 of the situation lower piston cylinder 5 of high shear rate, die down, can only lean on the extruding force of electrorheological fluid 11 that damping force is provided; And in the electrorheological fluid 11 of backflow control access 7, be not subject to the impact of high shear rate, and there is rapidly electric rheological effect, make that passage sections is long-pending to diminish until sealing completely; The change of backflow control access 7 and then cause electrorheological fluid 11 cannot effectively realize mutually flowing between both positive and negative polarity, thus the squeezed air-damping power that electrorheological fluid 11 provides increased; And large damping force can further reduce shearing rate, along with the reduction of shearing rate, the rheological effect of electrorheological fluid 11 strengthens to some extent, and its apparent viscosity increases, and the shearing force that can provide and extruding force increase; So can reach the object of the vibration of effective Control Engineering system under high shear rate situation.
Although above-mentioned, by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technological scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (6)
1. seven grades of adjustable reciprocating current liquescent dampers, comprise cathode conductor (1), negative pole piston cylinder cover (2), piston rod (3), insulation piston cylinder (5), negative pole (6), electrorheological fluid (11), anodal (12), anodal piston cylinder cover (14), positive wire (15), it is characterized in that: also comprise backflow control access (7), small piston (8), middle piston (9), large piston (10); Wherein, negative pole (6) is cylindrical structure with anodal (12); Negative pole piston cylinder cover (2), anodal piston cylinder cover (14) have the aperture of drawing for cathode conductor (1), positive wire (15); Negative pole piston cylinder cover (2), negative pole (6), anodal (12), anodal piston cylinder cover (14), small piston (8), middle piston (9), large piston (10) all have the center hole passing for piston rod (3); Negative pole (6), negative pole piston cylinder cover (2), successively through after piston rod (3), are bolted to connection by negative pole piston cylinder cover (2) and insulation piston cylinder (5); Anodal (12), anodal piston cylinder cover (14), successively through after piston rod (3), are bolted to connection by anodal piston cylinder cover (14) and insulation piston cylinder (5); Any one in small piston (8), middle piston (9), large piston (10) or two or three are connected with piston rod (3) that to realize seven grades of reciprocating current liquescent damper adjustable arbitrarily; It is upper that described backflow control access (7) is opened in insulation piston cylinder (5), and be communicated with negative pole (6) and anodal (12).
2. seven grades of adjustable reciprocating current liquescent dampers according to claim 1, it is characterized in that: also comprise negative pole conductive rubber (4), anodal conductive rubber (13), described negative pole conductive rubber (4) is arranged between negative pole piston cylinder cover (2) and negative pole (6), described anodal conductive rubber (13) is arranged on anodal piston cylinder cover (14) and anodal (12) between, and all have the center hole passing for piston rod (3) on described negative pole conductive rubber (4), anodal conductive rubber (13).
3. seven grades of adjustable reciprocating current liquescent dampers according to claim 2, it is characterized in that: described negative pole (6) is made by conductive material with anodal (12), described negative pole piston cylinder cover (2), anodal piston cylinder cover (14) are made by insulating material, and described negative pole conductive rubber (4), anodal conductive rubber (13) are for there being the seal arrangement of electric action after being under pressure.
4. seven grades of adjustable reciprocating current liquescent dampers according to claim 1, it is characterized in that: also comprise flat key (16), piston rod (3) is by described flat key (16) and small piston (8), middle piston (9), any one in piston (10) or two or three are connected arbitrarily greatly.
5. seven grades of adjustable reciprocating current liquescent dampers according to claim 1, it is characterized in that: according to the size of damping force, determine the installation form of small piston (8), middle piston (9), large piston (10), seven grades of realizing reciprocating current liquescent damper are adjustable.
6. seven grades of adjustable reciprocating current liquescent dampers according to claim 1, it is characterized in that: according to the size of the movement velocity of the structure of vibration to be controlled, determine the installation form of small piston (8), middle piston (9), large piston (10), seven grades of realizing reciprocating current liquescent damper are adjustable.
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| CN104963982A (en) * | 2015-06-19 | 2015-10-07 | 中国人民解放军装甲兵工程学院 | Rotary extrusion type magnetorheological damper |
| CN105179575A (en) * | 2015-07-19 | 2015-12-23 | 常州大学 | Double-rod multistage-piston self-adaptation magnetorheological damper |
| CN105179574A (en) * | 2015-07-19 | 2015-12-23 | 常州大学 | Single-rod multistage-piston active single-control variable-damping magneto-rheological damper |
| CN105570376A (en) * | 2015-12-31 | 2016-05-11 | 浙江科技学院 | Electrorheological fluid shock absorber |
| CN108533662A (en) * | 2018-04-23 | 2018-09-14 | 上海大学 | A kind of giant electro-rheological fluid damper |
| CN109443805A (en) * | 2019-01-14 | 2019-03-08 | 吉林大学 | Car test bench based on ER fluid becomes slip rate slide plate |
| CN109537420A (en) * | 2019-01-25 | 2019-03-29 | 吉林大学 | Reciprocating vehicle-mounted road surface flaw detection system frequency test instrument based on ER fluid |
| CN109764079A (en) * | 2018-12-27 | 2019-05-17 | 国家***第一海洋研究所 | A kind of marine generator device systems vibration and noise reducing device |
| CN110055125A (en) * | 2019-05-31 | 2019-07-26 | 青岛科技大学 | A kind of hud typed composite material by electric current of anisotropic TS-1 molecular sieve/TiOx nano becomes liquid and preparation method thereof |
| CN111640599A (en) * | 2020-05-30 | 2020-09-08 | 西安交通大学 | Damping system capable of adjusting switch opening and closing stroke curve and working method |
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| CN109537420A (en) * | 2019-01-25 | 2019-03-29 | 吉林大学 | Reciprocating vehicle-mounted road surface flaw detection system frequency test instrument based on ER fluid |
| CN110055125A (en) * | 2019-05-31 | 2019-07-26 | 青岛科技大学 | A kind of hud typed composite material by electric current of anisotropic TS-1 molecular sieve/TiOx nano becomes liquid and preparation method thereof |
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| CN111640599A (en) * | 2020-05-30 | 2020-09-08 | 西安交通大学 | Damping system capable of adjusting switch opening and closing stroke curve and working method |
| CN111640599B (en) * | 2020-05-30 | 2021-03-16 | 西安交通大学 | Damping system capable of adjusting switch opening and closing stroke curve and working method |
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Application publication date: 20140219 |