CN105696721A - Intelligent fluid viscous damper based on laminated piezoelectric actuator - Google Patents
Intelligent fluid viscous damper based on laminated piezoelectric actuator Download PDFInfo
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- CN105696721A CN105696721A CN201610056967.0A CN201610056967A CN105696721A CN 105696721 A CN105696721 A CN 105696721A CN 201610056967 A CN201610056967 A CN 201610056967A CN 105696721 A CN105696721 A CN 105696721A
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- guide rod
- stacked piezoelectric
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to an intelligent fluid viscous damper based on a laminated piezoelectric actuator. The intelligent fluid viscous damper comprises a cylinder barrel with a main cylinder and a secondary cylinder, a piston, a main guide rod and a secondary guide rod, wherein the piston, the main guide rod and the secondary guide rod are located in the cylinder barrel; the tail end of the main guide rod is fixedly connected with the first end surface, corresponding to the main cylinder, of the piston; the head end of the secondary guide rod is fixedly connected with the second end surface, corresponding to the secondary cylinder, of the piston; the cylinder barrel is filled with viscous fluid damping materials; and the piston is provided with a damping hole penetrating through the first end surface and the second end surface. The intelligent fluid viscous damper further comprises the laminated piezoelectric actuator installed on the secondary guide rod, a valve installed on the damping hole and a transmission shaft connected with the laminated piezoelectric actuator and the valve, and the transmission shaft drives the valve to move under the driving of the laminated piezoelectric actuator, so that the aperture of the damping hole is adjustable. The intelligent fluid viscous damper based on the laminated piezoelectric actuator can reduce the time-lag influence and improve output capacity, thereby meeting the requirement for seismic control of civil engineering under the action of earthquakes.
Description
Technical field
The present invention relates to civil engineering structure energy-dissipating and shock-absorbing semi-active control technical field, be specifically related to a kind of have exert oneself greatly, adjustable multiple is high and the fluid linking damper of the variable aperture of fast response time, it adopts the piezo electric valve based on building up piezoelectric actuator to regulate viscous damping power。
Background technology
Viscid fluid energy dissipation damper (ViscousFluidDamper, i.e. VFD, it is called for short fluid linking damper), referring to is flowed in piston hole and/or gap by viscose liquids produces damping, dissipation vibrational energy, viscid hydromechanical correlational study shows, this damping force is main relevant to the movement velocity of piston, so being a kind of velocity correlation type energy dissipation damper。The type antivibrator is general as shown in Figure 1, by cylinder barrel (including master cylinder 1 and secondary cylinder 2), piston 3, damping hole 4, leading rod 5 and secondary composition such as guide rod 6 part such as grade, viscous flow body is filled in cylinder barrel, for producing bigger damping force, sealing of cylinder barrel is also utilized to form the maximum oil pressure (occurrence of this oil pressure is determined) up to about 200MPa by the size of damping force needed for damping, now piston longitudinally moves reciprocatingly along cylinder barrel, and piston has appropriate aperture become damping hole (and/or the mechanical engagement gap between piston and cylinder barrel), viscid fluid damping material passes through from piston damping hole high speed, bigger viscous damping power can be produced。The cylinder barrel of civil engineering structure fluid linking damper is generally manufactured and designed (this and frcition damper are significantly different by enterprise in charge of construction's design and in-site installation) by large-scale brand machinery plant, cylinder barrel material often can adopt high strength alloy steel, there is good sealing and voltage endurance capability, so cylinder barrel can bear very big oil pressure, it is provided that very big damping (damping force is more order of magnitude greater than frcition damper), thus the vibration of civil engineering structure can be efficiently reduced, because the antivibrator relative to mechanical engineering field, the quality that the feature of civil engineering is works is huge especially, the damping needed also tends to big several orders of magnitude than mechanical field。It is due to the reason of machining factory made with high precision equally, it also has that properties of product are stable, damping force is exerted oneself precision height (substantially increase the controllability of seismic structural response, and be easy to the calculating of seismic structural response), durability and temperature stabilization be the advantage such as especially good also。
Above-mentioned advantage shows, in civil engineering structure antidetonation and anti-wind control, fluid linking damper has broad application prospects；Since 20 century 70s, the energy-dissipating and shock-absorbing being progressively widely used in civil engineering structure controls。In this process, the developed economies countries such as the U.S., Japanese and European Italy take the lead in being applied to Practical Project, then the city of the key city of countries in the world, particularly Areas of High Earthquake Intensity, also successively puts into practical engineering application in the shockproof control of its landmark building。In recent years, the key city (particularly the megapolis such as Beijing and Tianjin) in the highlight lines area of China also starts practical implementation gradually, wherein the product of Tyler Corporations of the U.S. (TaylorDevicesInc.), Shanghai Inst. of Materials and Liuzhou Ou Wei nurse company etc. is applied quite extensive at home, particularly relatively universal in the vibration control of large bridge is applied, such as: Beijing Olympic Games Pan Gu's grand sight skyscraper, the seismic hardening of Beijing train Beijing West Railway Station, Construction of Hangzhou Bay Cross-sea Bridge and the port Zhuhai and Macao bridge etc. built。
The viscous damping power of current fluid linking damper design is unadjustable, causes that the damping effect of its civil engineering structure is very limited, greatly limit the range of application of fluid linking damper。The scholar Kelly in such as U.S.'s shock insulation field already points out to install fluid linking damper at Seismic Isolation of Isolation Layer, acceleration and the relative storey displacement of amplifying Seismic Isolation of Isolation Layer superstructure when little shake and middle shake will be caused, that is reduce isolating affection and even isolating affection is reduced to zero, add the feature installing fluid linking damper somewhat expensive, cause that its engineer applied scope is greatly affected。
PattenW. of the U.S. in 1998 et al. is mounted with the variable orifices fluid linking damper utilizing conventional solenoid valve to control on the highway bridge of U.S. Okahoma, and carried out field measurement, measured result shows, this semi-active control can be greatly reduced the bridge structure vibration that vehicle causes, thus the service life extending highway bridge on the original basis reaches 40 years。2000, first Intelligent Hybrid shock-insulation building built up in Keio university of Japan in the world, is this University Engineering Department institute building, and this office have employed variable orifices fluid linking damper exactly with test building and builds up rubber earthquake isolation support as earthquake protection system。
But traditional electromagnetic valve is subject to the impact of magnetic hysteresis and machinery inertial, response speed is difficult to meet civil engineering demand of shockproof control under geological process。Furthermore, the power output of electromagnetic motor is also big not, cause direct drive valve core difficulty, and have to adopt grade B servo valve, by hydraulic control mode, the low power signal of telecommunication is amplified, its response time is elongated further by hydraulic system, therefore the shockproof control design and analysis of former variable orifice fluid linking damper all needs to consider time lag。Harbin Institute of Technology Li Hui's et al. it have been experienced that, the applying frequency of electromagnetic valve variable orifice antivibrator is at below 2Hz, and time-delay is obvious。
Summary of the invention
Theoretical according to Modern piezoelectric, the electrostrictive amount of piezoceramic material is directly proportional to being applied to electric field intensity thereon, this is utilized to be referred to as the principle of inverse piezoelectric effect, it is an object of the invention to design one utilizes stacked piezoelectric driver to carry out control valve, by the pore size of the valve regulated damping hole intelligent fluid linking damper with damping adjusting power, this intelligence fluid linking damper can reduce time-delay and improve power output, thus meeting civil engineering demand of shockproof control under geological process。
Specifically, a kind of intelligent fluid linking damper regulated based on stacked piezoelectric driver that the present invention proposes, including having master cylinder and the cylinder barrel of secondary cylinder, and it is positioned at the piston of cylinder barrel, leading rod and secondary guide rod, the tail end of leading rod is fixedly connected on first end face corresponding with described master cylinder of described piston, and the head end of secondary guide rod is fixedly connected on second end face corresponding with described secondary cylinder of described piston；Equipped with viscose liquids damping material inside described cylinder barrel, described piston has the damping hole running through described first end face and the second end face；This intelligence fluid linking damper also includes being arranged on the stacked piezoelectric driver on described secondary guide rod, the valve being arranged on described damping hole and connecting the power transmission shaft of described stacked piezoelectric driver and described valve；Described power transmission shaft drives described valve motion under the driving of described stacked piezoelectric driver, and the aperture making described damping hole is adjustable。
In present invention further optimization scheme, described stacked piezoelectric driver is arranged on the tail end of described secondary guide rod, and is also equipped with anticollision pad at the tail end of described secondary guide rod。
In present invention further optimization scheme, described anticollision pad is specially rubber blanket。
In present invention further optimization scheme, described secondary guide rod has hollow structure, and described power transmission shaft is arranged in described secondary hollow structure within guide rod。
In present invention further optimization scheme, described cylinder barrel, piston, leading rod and secondary guide rod are high-strength stainless steel。
In present invention further optimization scheme, also including control system, described control system electrically connects with described stacked piezoelectric driver。
Beneficial effect: the intelligent fluid linking damper regulated based on stacked piezoelectric driver that the present invention proposes, can by stacked piezoelectric driver drives valve, the aperture of the damping hole of fluid linking damper is regulated by this valve, to realize the adjustment to viscous damping power, this valve by stacked piezoelectric driver drives has positioning precision height (up to nanoscale) and the feature of fast response time (up to the microsecond order of magnitude), time-delay can be reduced and improve power output, thus meeting civil engineering demand of shockproof control under geological process。
Accompanying drawing explanation
Fig. 1 is the structural representation of the fluid linking damper of prior art。
Fig. 2 is the structural representation of the intelligent fluid linking damper regulated based on stacked piezoelectric driver that embodiment proposes。
Fig. 3 is the structural representation of valve in the intelligent fluid linking damper regulated based on stacked piezoelectric driver that embodiment proposes。
In Fig. 2 and Fig. 3: 10-master cylinder, 20-pair cylinder, 30-piston, 40-leading rod, 50-pair guide rod, 60-damping hole, 71-stacked piezoelectric driver, 72-valve, 73-power transmission shaft, 74-anticollision pad。
Detailed description of the invention
For the ease of it will be appreciated by those skilled in the art that the present invention is described further below in conjunction with accompanying drawing and embodiment。
Refer to Fig. 2 and Fig. 3, a kind of intelligent fluid linking damper regulated based on stacked piezoelectric driver that the present embodiment proposes, including having master cylinder 10 and the cylinder barrel of secondary cylinder 20, and it is positioned at the piston 30 of cylinder barrel, leading rod 40 and secondary guide rod 50, the tail end of leading rod 40 is fixedly connected on first end face corresponding with described master cylinder 10 of described piston 30, and the head end of secondary guide rod 50 is fixedly connected on second end face corresponding with described secondary cylinder 20 of described piston 30；Equipped with viscose liquids damping material inside described cylinder barrel, described piston 30 has the damping hole 60 running through described first end face and the second end face。
The intelligent fluid linking damper of the present embodiment also includes being arranged on the stacked piezoelectric driver 71 on described secondary guide rod 50, the valve 72 (Fig. 2 is not shown, refers to Fig. 3) being arranged on described damping hole 60 and the power transmission shaft 73 connecting described stacked piezoelectric driver 71 and described valve 72；Described power transmission shaft 73 drives described valve 72 to move under the driving of described stacked piezoelectric driver 71, and the aperture making described damping hole 60 is adjustable。
Described stacked piezoelectric driver 71 specifically may be installed the tail end of described secondary guide rod 50, is also equipped with anticollision pad 74 at the tail end of described secondary guide rod 50 simultaneously, and this anticollision pad 74 can be specifically rubber blanket。For the ease of installing power transmission shaft 73, described in the present embodiment, secondary guide rod 50 has hollow structure, and described power transmission shaft 73 is arranged in described secondary hollow structure within guide rod 50。
In order to ensure intensity, cylinder barrel described in the present embodiment, piston 30, leading rod 40 and secondary guide rod 50 are high-strength stainless steel。
Additionally, the present embodiment also can farther include control system (not shown go out), described control system is connected by electric wire with described stacked piezoelectric driver 71, and connects stacked piezoelectric driver special DC power supply。By arranging voltage in the controls, including arranging the size of voltage or the positive and negative of voltage, stacked piezoelectric driver 71 is made to drive power transmission shaft 73 corresponding actions, (it is front by the left side of Fig. 2 or Fig. 3 forward or backward with movable valve 72, right side is for rear) move certain stroke, with the aperture (namely regulating its closed stratum to damping hole 60) in damping adjusting hole 60。In the present embodiment, when stacked piezoelectric driver 71 displacement is 1, the radius displacement of valve 72 damping adjusting hole 60 is scalable to 3-4 times。
The intelligent fluid linking damper based on the adjustment of stacked piezoelectric driver that the present embodiment proposes is the semi-automatic control device that a kind of adjustable multiple is big, strong randomness suitable in earthquake motion, such as it is arranged on Seismic Isolation of Isolation Layer, no matter little shake, middle shake and big shake can ensure isolating affection, and response speed is very fast, can reducing time-delay, response speed is entirely capable of catching up with earthquake motion, improves power output simultaneously。
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention。It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention。Therefore, the protection domain of patent of the present invention should be as the criterion with claims。
Claims (6)
1. the intelligent fluid linking damper regulated based on stacked piezoelectric driver, including having master cylinder and the cylinder barrel of secondary cylinder, and it is positioned at the piston of cylinder barrel, leading rod and secondary guide rod, the tail end of leading rod is fixedly connected on first end face corresponding with described master cylinder of described piston, and the head end of secondary guide rod is fixedly connected on second end face corresponding with described secondary cylinder of described piston；Equipped with viscose liquids damping material inside described cylinder barrel, described piston has the damping hole running through described first end face and the second end face；It is characterized in that, this intelligence fluid linking damper also includes being arranged on the stacked piezoelectric driver on described secondary guide rod, the valve being arranged on described damping hole and connecting the power transmission shaft of described stacked piezoelectric driver and described valve；Described power transmission shaft drives described valve motion under the driving of described stacked piezoelectric driver, and the aperture making described damping hole is adjustable。
2. the intelligent fluid linking damper regulated based on stacked piezoelectric driver according to claim 1, it is characterised in that described stacked piezoelectric driver is arranged on the tail end of described secondary guide rod, and it is also equipped with anticollision pad at the tail end of described secondary guide rod。
3. the intelligent fluid linking damper regulated based on stacked piezoelectric driver according to claim 2, it is characterised in that described anticollision pad is specially rubber blanket。
4. the intelligent fluid linking damper regulated based on stacked piezoelectric driver according to claim 3, it is characterised in that described secondary guide rod has hollow structure, described power transmission shaft is arranged in described secondary hollow structure within guide rod。
5. the intelligent fluid linking damper regulated based on stacked piezoelectric driver according to claim 4, it is characterised in that described cylinder barrel, piston, leading rod and secondary guide rod are high-strength stainless steel。
6. the intelligent fluid linking damper regulated based on stacked piezoelectric driver according to claim 5, it is characterised in that also including control system, described control system electrically connects with described stacked piezoelectric driver。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610056967.0A CN105696721B (en) | 2016-01-26 | 2016-01-26 | The intelligent fluid linking damper adjusted based on stacked piezoelectric driver |
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| CN201610056967.0A CN105696721B (en) | 2016-01-26 | 2016-01-26 | The intelligent fluid linking damper adjusted based on stacked piezoelectric driver |
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| CN105696721B CN105696721B (en) | 2018-07-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109014925A (en) * | 2018-07-25 | 2018-12-18 | 芜湖易测自动化设备有限公司 | A kind of punch device for electric fittings |
| CN109268432A (en) * | 2018-11-16 | 2019-01-25 | 广州大学 | A kind of damper |
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| CN205382588U (en) * | 2016-01-26 | 2016-07-13 | 广州大学 | Viscid attenuator of intelligence based on stromatolite piezo -actuator adjusts |
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| CN2426930Y (en) * | 2000-03-17 | 2001-04-18 | 东南大学 | Engineering structure damping fluid bumper |
| CN101576139A (en) * | 2009-05-13 | 2009-11-11 | 东南大学 | Controllable viscous damper |
| CN101851963A (en) * | 2010-06-23 | 2010-10-06 | 湖南大学 | Piezoelectric-SMA composite variable friction intelligent damper |
| JP2013182904A (en) * | 2012-02-29 | 2013-09-12 | Tamron Co Ltd | Lamination type piezoelectric actuator |
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Cited By (3)
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| CN109014925A (en) * | 2018-07-25 | 2018-12-18 | 芜湖易测自动化设备有限公司 | A kind of punch device for electric fittings |
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| CN109268432B (en) * | 2018-11-16 | 2023-08-18 | 广州大学 | Damper |
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| CN105696721B (en) | 2018-07-31 |
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