CN100478580C - Inflation damping continuous adjusting current transformation vibration damper - Google Patents
Inflation damping continuous adjusting current transformation vibration damper Download PDFInfo
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- CN100478580C CN100478580C CNB2006101279525A CN200610127952A CN100478580C CN 100478580 C CN100478580 C CN 100478580C CN B2006101279525 A CNB2006101279525 A CN B2006101279525A CN 200610127952 A CN200610127952 A CN 200610127952A CN 100478580 C CN100478580 C CN 100478580C
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Abstract
An electro-rheologic vibration absorber with damping continuously adjustable function in air charging type is prepared as embedding columnar electro-rheologic spring and compressing valve as well as drawing valve in piston of said absorber, setting oil channel on piston to let hydraulic oil flow in reciprocation way, using float piston to divide cylinder to be two parts of up oil chamber and down air chamber, setting piston rod to be hollow structure being used to pass wire to be connected with electro-rheologic spring and charging electro-rheologic fluid with apparent viscosity being controlled by externally exerted magnetic field in said spring.
Description
Technical field
Patent of the present invention is a kind of aerated formula damping continuous adjusting current transformation vibration damper.Suspension half ACTIVE CONTROL that is used for various wheeled vehicles and endless-track vehicle.
Background technique
The draft hitch of vehicle is the general name that connects whole part and assemblies between vehicle body and the wheel, mainly is made up of spring (as leaf spring, helical spring, torsion bar etc.), vibration damper and guide mechanism three parts.When vehicle driving on different road surfaces and when making wheel be subjected to arbitrary excitation, because draft hitch has been realized the yielding support between car body and the wheel, the dynamic load and the vibration of car body and wheel have been suppressed, have reduced effectively, thereby guarantee the smoothness and the control stability of vehicle driving, reach the purpose that improves average overall travel speed.The smoothness of vehicle driving and control stability are to weigh the leading indicator of suspension property quality, but these two aspects are the performance requirements that repel mutually.For example, if reduce the rigidity of spring, then car body acceleration reduces to make smoothness to improve, but can cause the increase of car body displacement simultaneously, and the change that produces body gravity thus will cause the increase that loading of tire changes, and control stability is produced harmful effect; On the other hand, increase spring rate and can improve control stability, but hard spring will cause automobile road pavement Roughness very sensitive, smoothness is reduced.Therefore, desirable suspension should have different spring rate resistance of shock absorbers under different service conditions, can satisfy the smoothness requirement and can satisfy the control stability requirement again.Passive suspension is because of having fixing suspension rate and damping constant, satisfying the compromise of contradiction between smoothness and the control stability on the structural design, can't reach the dreamboat of suspension control.In order to make passive suspension can have certain adaptability, usually the damping of the rigidity of suspension and vibration damper is designed to have to a certain degree non-linear, as the dydraulic shock absorber that adopts variable-pitch screw spring and three grades of resistance controls etc. to different road conditions.
Because the starting point of passive suspension design is to trade off satisfying between smoothness and the control stability, so, for different usage requirements, can only be on the basis of satisfying the main performance requirement, to sacrifice supplementary properties, performance requirement that can't be scalable and road conditions.Although target low-cost, high reliability that passive suspension has been realized to update passive device in design can't thoroughly solve all the time and satisfies conflicting requirement between smoothness and the control stability simultaneously.For this reason, produced the notion of Active suspension from the sixties in last century, and along with modern control theory and development of electronic technology and the extensive use on vehicle thereof, conflicting requirement has shown new approach between smoothness and the control stability in order fundamentally to solve.
Active suspension has improved the smoothness and the control stability of vehicle simultaneously, for the theory and the experimental research of suspension brought major transformation.But, although its advantage is apparent, and the sample car of Active suspension has appearred being equipped with in advanced industrial country, Active suspension is pushed to that the vehicle production line remains a discretion and process slowly.At first, because the control system of Active suspension needs complicated sensor and control electronics, actuator not only will select high-precision hydraulic servo device for use, and to drive by bigger external impetus, cause cost height, complex structure, reliability low, when having only Active suspension required hardware, particularly actuator to become more economic and reliable, just might make it to enter the conclusive market development stage; Secondly, the basic experience and the lesson of Active suspension research are that " existing Active suspension " broken away from the contradiction between well-known " smoothness control stability ", but caused the contradiction between new " performance and actuator's power ", be that the required power of Active suspension driving actuator is considerable, for this reason, begin just to have produced compromise proposal between Active suspension and passive suspension from the seventies in last century, i.e. semi-active suspension.
Semi-active suspension typically refers to the suspension that one of suspension element medi-spring rigidity and resistance of shock absorber coefficient can be regulated control as required.In order to reduce the required power of actuator, semi-active suspension research mainly concentrates on the damping constant aspect of regulating vibration damper, and the vibration damper that damping can be regulated as required is also referred to as adaptive transmission control or active damper.Finishing this work only needs the absorber damping force size is controlled the control law that just can reach the approximate Active suspension of half-wave, and the power of Xiao Haoing is also smaller simultaneously.By absorber damping force size adjustment process is classified, adaptive transmission control can be divided into grade adjustable shock absorber and stepless adjustable shock absorber.There is a grade adjustable shock absorber to be actually and in damper structure, adopts comparatively simple control valve to make circulation area between maximum, medium or minimum, have level to regulate, Electric Machine Control rotary valve by the vibration damper top makes vibration damper at rotational position damping force soft/in/change between the hard third gear, there are the structure and the control system thereof of grade adjustable shock absorber simple relatively, but aspect the variation that adapts to automobile running working condition and road conditions certain narrow limitation arranged.The normal following two kinds of methods that adopt are regulated in the damping of stepless adjustable shock absorber: (1) throttle diameter is regulated: the valve rod that drives vibration damper by step motor drive is regulated the flow area of vibration damper continuously, and the actuating valve that changes damping throttle valve or other form is realized.The subject matter of this class vibration damper is the throttle valve complex structure, the manufacture cost height; (2) vibration damper liquid viscosity is regulated: the new function material electrorheological fluid or the magnetic flow liquid that use the viscosity continuous controllable, thereby realize the stepless variation of damping, electricity (magnetic) rheological fluid powers up under (magnetic) field action outside, its rheologic behavio(u)r is (as shear strength, apparent viscosity etc.) the significant variation can be taken place, with pack into vibration damper and add power on (magnetic) of this electricity (magnetic) rheological fluid at (or on damper piston) between the inside and outside tube, by changing the viscosity-modifying that electricity (magnetic) field strength makes electricity (magnetic) rheological fluid, thereby change the damping force of vibration damper.Because the damping of electric (magnetic) rheology vibration damper can change continuously with the change of electricity (magnetic) field strength, this is a selection preferably beyond doubt.
Fatal problem of electricity (magnetic) rheological fluid vibration damper is that its apparent viscosity decline is very fast under high shear rate, even can be lower than the viscosity number under the null field, and this is determined by its self character that becomes a kind of non-Newtonian fluid under electricity (magnetic) field action.The effectiveness in vibration suppression that shows is exactly identical when damping force is with null field under large amplitude or high frequency vibration condition, even the good damping result when the null field.
Another notable feature of current liquid is that the anti-shearing relatively stress of its anti-extrusion stress under the extra electric field effect has bigger variation effect, therefore in recent years the research of the anti-extrusion stress of current liquid is subjected to day by day researcher's attention, has also obtained some gratifying results of study.In conjunction with first kind of regulating method of adaptive transmission control, can utilize current liquid when being squeezed, can not the throttle orifice on the damper piston to be regulated with the difference of the deformation extent under the field intensity.Concrete adjustment process is exactly to control the stroke of vibration damper compression valve and stretching valve by the rigidity of control electrorheological spring, thereby realizes the adjusting to the throttle orifice aperture.
Summary of the invention
A kind of inflation damping continuous adjusting current transformation vibration damper comprises piston rod, seal ring, vibration damper cylinder barrel, piston assembly, floating piston, air chamber, vibration damper upper end cap, vibration damper epicoele, lock-nut, vibration damper cavity of resorption, floating piston seal ring and vibration damper lower end cap.Be embedded with electrorheological spring, vibration damper compression valve and stretching valve in the damper piston, wherein the electrorheological spring is that column electrorheological spring or cyclic currents become spring.The piston rod of damper piston and hollow-core construction is by Bolt Connection, and lead links by box type piston bar and electrorheological spring, and floating piston is divided into accumulator and the upper and lower two-part of gas storage chamber to vibration damper.The working medium that back and forth flows by the damper piston damping hole is common vibration damper hydraulic oil, and current liquid is encapsulated in column or cyclic currents becomes in the spring.Column electrorheological spring is formed an enclosed construction by top crown, lower polar plate, metal spring and oil resistant rubber.As supporting structure, the centre is embedded with sheet metal and lower polar plate forms a parallel electric field by insulating material for top crown.Cyclic currents becomes spring and forms an enclosed construction by last annulus pole plate, following annulus pole plate, metal spring and oil resistant rubber.At different damper piston structures, two-part that one of them pole plate of electrorheological spring can be made of one or can effectively contact with piston valve core.The present invention replaces elastic valve plate on the common dydraulic shock absorber piston with the electrorheological spring, utilize the controllable stiffness of electrorheological spring to make vibration damper compression valve and stretching valve under the effect of fluid pressure, have different displacements to control the aperture of the throttle orifice on the damper piston, thereby realize continuous adjusting the absorber damping force size.Utilize electrorheological spring rate controlling method control absorber damping force size that stronger adaptability is arranged, only need common dydraulic shock absorber piston is improved and can realize, the effectiveness in vibration suppression that can keep common vibration damper under the situation of electrorheological spring failure is changed repairing or improvement that electrorheological spring or piston assembly can be finished vibration damper.
Description of drawings
Fig. 1 is an inflation damping adjustable electric rheology damper structure schematic representation, and main structure is piston rod 1, seal ring 2, cylinder barrel 3, piston assembly 4, floating piston 5, air chamber 6, vibration damper upper end cap 7, vibration damper epicoele 8, locking bolt 9, vibration damper cavity of resorption 10, seal ring 11, vibration damper lower end cap 12 among the figure;
Fig. 2 is the damper piston structural representation, and main structure is piston body 403, compression oil duct 404, stretching oil duct 405 among the figure;
Fig. 3 is the upper and lower cover plate schematic representation of damper piston, and main structure is stretching valve core and spring eye 406, compression valve spool and spring eye 407, piston rod attachment hole 408, compression valve and stretching valve oil road 409 among the figure;
Fig. 4 is a column electrorheological spring structure schematic representation;
Fig. 5 becomes the spring structure schematic representation for cyclic currents;
Embodiment
A kind of inflation damping adjustable electric rheology vibration damper mainly comprises piston rod 1, shock absorber sealing circle 2, vibration damper cylinder barrel 3, damper piston assembly 4, floating piston 5, closed air chamber 6, vibration damper top cover 7, vibration damper epicoele 8, lock-nut 9, vibration damper cavity of resorption 10, floating piston ring 11, vibration damper lower end cap 12 compositions.Damper piston assembly 4 becomes spring 402, compression valve, stretching valve and relevant oil duct by column electrorheological spring 401 or cyclic currents and forms.The lead that is connected with electrorheological spring 401 or 402 joins with vibration damper external high pressure power supply by the piston rod 1 of hollow-core construction, and piston rod 1 is fixed together by lock-nut 9 with piston assembly 4.Floating piston 5 is positioned at the vibration damper bottom, forms a sealed gas chamber 6 with vibration damper lower end cylinder barrel, is filled with the inert gas of certain pressure.When vehicle is subjected to the external vibration excitation, damper piston 4 is reciprocating in fluid, make between vibration damper epicoele 8 and the cavity of resorption 10 and produce pressure difference, pressure oil is just pushed compression valve or stretching valve open and is flowed back and forth between corresponding oil duct, because the damping function of valve and oil duct, the vibration that vehicle is subjected to is decayed.The variation of the cylinder barrel volume that causes owing to the turnover of shock absorber piston rod 1, then the upper and lower motion by floating piston 5 compensates.When there not being extra electric field to do the time spent, the compression valve in the piston assembly 4 and stretching valve have different displacements with the size of piston movement speed, make corresponding oil duct that different apertures be arranged; After applying an electric field for electrorheological spring 401 or 402, because the variation of the anti-extrusion stress of current liquid, make its deformation extent of time spent and can change being subjected to external force, compression valve that is attached thereto and stretching valve position are moved and are also had corresponding change, the aperture that is valve changes, damping force when making vibration damper liquid flow through valve and oil duct changes, and has realized the change of absorber damping force.Because extra electric field intensity can stepless continuous change, the also corresponding continuous stepless that has of the aperture of valve changes on the piston, and the corresponding damping force size that vibration damper produced also is that stepless continuous changes.The compression oil duct is different with stretching oil duct number and aperture, can make vibration damper produce different compression damping power and stretching damping force.Finish by the upper and lower cover plate of piston compression valve and stretching valve and the location of corresponding electrorheological spring in piston assembly 4, and upper and lower cover is finished location in piston assembly 4 by snap ring, should notice during the location that oil through above it and the oil duct on the piston align.
This piston assembly is equally applicable to double adjustable shock absorber and lever type shock absorber.
Column electrorheological spring 401 is formed an enclosed construction by top crown 401a, lower polar plate 401b, metal spring 401c and oil resistant rubber 401d, and current liquid is equipped with in the centre.As supporting structure, the centre is embedded with sheet metal and lower polar plate 401b forms a parallel electric field by insulating material for top crown 401a.Oil resistant rubber 401d closely is not connected to form a drum organization by snap ring and top crown 401a and lower polar plate 401b, and upper and lower pole plate inside edge has the circular groove to the metal spring location, and lower polar plate 401b well has metallic material to make by electric conductivity.Current liquid is injected by the top crown screwed hole of centre, finish the back by the plug screw sealing and as the positive pole of electrorheological spring by lead by box type piston bar external high voltage power supply.The effect of metal spring 401c is the flexibility decrease of rubber after the long-time vibrational temperature of vibration damper raises, and influences the service behaviour of electrorheological spring 401.If can guarantee that under the prerequisite that the electrorheological spring is worked at normal temperatures, metal spring 401c also can remove.
Cyclic currents becomes spring 402 and is made up of last annulus pole plate 402a, following annulus pole plate 402b, metal spring 402c, oil resistant rubber 402d, its ring cross-section is identical with column electrorheological spring 401, adopts three identical metal springs of performance to be installed between upper and lower pole plate at least.Why considering that cyclic currents becomes spring, is for the consideration to damper piston 4 sizes and installation conditions aspect.When damper piston 4 sizes are big, can adopt cyclic currents to become spring 402.
Vibration damper lower end cap 12 welds together with cylinder barrel 3, and the floating piston 5 of packing into and having seal ring 11 reinstalls with piston rod 1 and connects the piston assembly 4 of getting well by nut 9, injects an amount of common vibration damper hydraulic oil.The vibration damper upper end cap 7 that seal ring 2 is housed is welded together by scyewed joint or interference fit joint with cylinder barrel 3 by piston rod 1 back again.Should be coated with sealer at the screw thread place when using threaded connection mode or take certain seal means to handle.Should at first charge into the inert gas of suitable pressure before using to vibration damper, inert gas charges into Kong Wei and marks in Fig. 1, should offer in vibration damper lower end proper site according to use condition.
The shell of the inflation damping adjustable electric rheology vibration damper that assembles links to each other with vehicle frame as earth electrode, and its positive pole is the lead that passes the piston rod hollow parts, joins with high-voltage power cathode.
Claims (5)
1. an inflation damping continuous adjusting current transformation vibration damper is characterized in that: comprise piston rod (1), seal ring (2), vibration damper cylinder barrel (3), piston assembly (4) floating piston (5), air chamber (6), vibration damper upper end cap (7), vibration damper epicoele (8), lock-nut (9), vibration damper cavity of resorption (10), floating piston seal ring (11), vibration damper lower end cap (12); Be embedded with electrorheological spring, vibration damper compression valve and stretching valve in the piston assembly (4), wherein the electrorheological spring is that column electrorheological spring (401) or cyclic currents become spring (402); The piston rod (1) of piston assembly (4) and hollow-core construction is by Bolt Connection, and lead links by box type piston bar and electrorheological spring; Floating piston (5) is divided into accumulator and the upper and lower two-part of gas storage chamber to vibration damper; The working medium that back and forth flows by the damper piston damping hole is common vibration damper hydraulic oil, and current liquid is encapsulated in column or cyclic currents becomes in the spring; Column electrorheological spring is formed an enclosed construction by top crown (401a), lower polar plate (401b), metal spring (401c) and oil resistant rubber (401d), and current liquid is equipped with in the centre; As supporting structure, the centre is embedded with sheet metal and top crown (401a) forms a parallel electric field by insulating material for top crown (401a); Cyclic currents becomes spring and forms an enclosed construction by last annulus pole plate (402a), following annulus pole plate (402b), metal spring (402c), oil resistant rubber (402d); At different damper piston structures, two-part that one of them pole plate of electrorheological spring can be made of one or can effectively contact with piston valve core.
2. inflation damping continuous adjusting current transformation vibration damper as claimed in claim 1 is characterized in that: have at least a column electrorheological spring (401) or cyclic currents to become spring (402) in the described piston assembly (4).
3. inflation damping continuous adjusting current transformation vibration damper as claimed in claim 1 is characterized in that: in the column electrorheological spring structure, top crown (401a), lower polar plate (401b) have at least one to make for insulating material, and the centre is embedded with the metallic conduction material.
4. inflation damping continuous adjusting current transformation vibration damper as claimed in claim 1, it is characterized in that: cyclic currents becomes spring (402) and forms an enclosed construction by last annulus pole plate (402a), following at least three metal springs of annulus pole plate (402b) (402c), oil resistant rubber (402d), and current liquid is equipped with in the centre; Last annulus pole plate (402a) and following annulus pole plate (402b) have at least one to make for insulating material, and the centre is embedded with the metallic conduction material.
5. inflation damping continuous adjusting current transformation vibration damper as claimed in claim 1, it is characterized in that: the electrorheological spring rate is controlled by extra electric field, the aperture of control damper piston compression valve and stretching valve, thus reach the purpose of controlling the absorber damping force size; Shock absorber oil is that common dydraulic shock absorber is with oily.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101279525A CN100478580C (en) | 2006-09-05 | 2006-09-05 | Inflation damping continuous adjusting current transformation vibration damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101279525A CN100478580C (en) | 2006-09-05 | 2006-09-05 | Inflation damping continuous adjusting current transformation vibration damper |
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| CN1912419A CN1912419A (en) | 2007-02-14 |
| CN100478580C true CN100478580C (en) | 2009-04-15 |
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| CNB2006101279525A Expired - Fee Related CN100478580C (en) | 2006-09-05 | 2006-09-05 | Inflation damping continuous adjusting current transformation vibration damper |
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Families Citing this family (14)
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| CN102146979B (en) * | 2011-03-21 | 2012-05-30 | 东南大学 | Leakage-free current variant damper |
| CN102537191B (en) * | 2012-02-20 | 2013-08-28 | 东南大学 | Rotation and axial-vibration damper with electro-rheological fluids |
| CN104568737B (en) * | 2015-01-08 | 2017-11-10 | 重庆材料研究院有限公司 | Magnetic control hydrodynamic performance test device based on flow pattern |
| CN105508341A (en) * | 2015-12-18 | 2016-04-20 | 广西大学 | Time delay piston device |
| CN105570376B (en) * | 2015-12-31 | 2017-10-13 | 浙江科技学院 | Electrorheological fluid vibration damper |
| US9969230B2 (en) * | 2016-04-11 | 2018-05-15 | Beijingwest Industries Co., Ltd. | Top mount assembly having adjustable damping characteristics |
| CN106122341B (en) * | 2016-05-26 | 2019-01-01 | 庆安集团有限公司 | A kind of gas spring of unidirectional damping type |
| CN105840712B (en) * | 2016-06-08 | 2017-07-28 | 吉林大学 | A kind of stepless adjustable power feeding shock absorber of half active |
| CN107472013A (en) * | 2016-08-25 | 2017-12-15 | 宝沃汽车（中国）有限公司 | A kind of method of pedal device for motor vehicle, vehicle and regulation pedal of vehicles damping |
| CN109751354A (en) * | 2017-11-02 | 2019-05-14 | 郑州宇通客车股份有限公司 | Air-supported shock absorber and the suspension system using the air-supported shock absorber, vehicle |
| CN108907845A (en) * | 2018-08-12 | 2018-11-30 | 陕西理工大学 | A kind of limiting device of multifunction machine |
| CN110107642B (en) * | 2019-05-29 | 2021-01-29 | 长安大学 | Gas-liquid spring combined vibration absorber |
| CN111156274B (en) * | 2019-11-29 | 2021-11-02 | 中国北方车辆研究所 | Single-cylinder annular cavity high-pressure hydro-pneumatic spring |
| CN112538972A (en) * | 2020-11-24 | 2021-03-23 | 温州山全贸易有限公司 | Energy-saving and environment-friendly steel bar prestress rigidity improving assembly |
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2006
- 2006-09-05 CN CNB2006101279525A patent/CN100478580C/en not_active Expired - Fee Related
Non-Patent Citations (2)
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| 一种电流变减振器阻尼特性的模拟计算. 谢峰，张少华.北京理工大学学报，第23卷第1期. 2003 |
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