CN105443634A - Basin type particle shock absorber with dual functions of tuning and collision - Google Patents

Basin type particle shock absorber with dual functions of tuning and collision Download PDF

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Publication number
CN105443634A
CN105443634A CN201610035595.3A CN201610035595A CN105443634A CN 105443634 A CN105443634 A CN 105443634A CN 201610035595 A CN201610035595 A CN 201610035595A CN 105443634 A CN105443634 A CN 105443634A
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CN
China
Prior art keywords
container
engineering
flange
collision
vibration
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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CN201610035595.3A
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Chinese (zh)
Inventor
冯又全
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Shanghai Fengchang Civil Engineering Technology Co Ltd
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Shanghai Fengchang Civil Engineering Technology Co Ltd
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Filing date
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Priority to CN201610035595.3A priority Critical patent/CN105443634A/en
Publication of CN105443634A publication Critical patent/CN105443634A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00Vibration-dampers; Shock-absorbers
    • F16F7/01Vibration-dampers; Shock-absorbers using friction between loose particles, e.g. sand
    • F16F7/015Vibration-dampers; Shock-absorbers using friction between loose particles, e.g. sand the particles being spherical, cylindrical or the like
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F7/00Vibration-dampers; Shock-absorbers
    • F16F7/10Vibration-dampers; Shock-absorbers using inertia effect

Abstract

The invention relates to a basin type particle shock absorber with dual functions of tuning and collision. The basin type particle shock absorber comprises a container, steel balls and liquid. The container is composed of a bottom face and lateral faces. The steel balls and the liquid are arranged in the container. The bottom of the container is fixed to an engineering structure, and the bottom face is a single-curvature spherical face or a multi-curvature complex curved face. The curvature of the curved face and the radii of the steel balls are designed as required by engineering, and the vibration frequency of the steel balls in the container and the vibration frequency of the liquid in the container can be made to be consistent with vibration fundamental frequency of the engineering structure, so that the tuning effect is achieved; the container vibrates along with the engineering structure, the steel balls and the liquid are opposite to the engineering structure in moving direction under the effect of inertia, thereby producing inertia force just opposite to the moving direction of the engineering structure. When multiple basin type particle shock absorbers are used, the containers are stacked successively from top to bottom. The device is free of direction limit, vibration of a fan tower shows 360-degree multi-direction by external incentive vibration, and rolling of the steel balls and vibration of the liquid also show 360-degree multi-direction due to influence from the bottom face of the curved face and can be changed in direction along with vibration of the tower at any time.

Description

A kind of have benzvalene form particle vibration damper that is tuning, collision double action
Technical field
The invention belongs to structural engineering vibration control technology field, be specifically related to a kind of have tuning, collision double action benzvalene form particle vibration damper.
Background technique
The a large amount of consumption of the mankind to traditional fossil energy make the energy and environmental problem day by day highlight, and wind-power electricity generation is one of effective measures solving this problem.For obtaining larger power capacity, wind-powered machine unit hub height constantly increases, and to wind energy resourceful sea development.The increase of wind-powered machine unit hub height makes tower oscillation problem more and more outstanding, and offshore wind farm set tower frame is under the multiple dynamic action couplings such as wind, wave, stream and ice shake, and vibration problem is severeer.Tower oscillation causes pylon, engine room structure and connected element thereof to produce fatigue effect, and affects the working life of fan operation quality, reduction structure and equipment.If increased the drag of structure by the strength grade etc. strengthening sectional dimension of members or raising material, then very uneconomical.Tuned mass damper (TMD) is verified by a lot of scholar the validity reducing High-rise Structures Under Wind response, but because the single order modal mass of large-scale wind electricity unit is generally up to hundreds of ton, the quality of TMD system just can obtain more significant damping efficiency when reaching more than 2% of single order modal mass, and have that vibration damping frequency range is narrow, mass block motion amplitude is large, increase the weight of the shortcomings such as engineering structure burden.As can be seen here, quality and the required installing space of TMD system are larger, and in blower fan tower barrel, be provided with the accessories such as cable, safety line, cat ladder, platform, the equipment such as gear-box, generator, braking device are had in cabin, the factors such as hub rotation, vane propeller-changing distance, cabin driftage, stormy waves coupling make pylon have larger resonant bandwidth, and the TMD vibration damping equipment being commonly used to civilian tall and slender structure does not have on tower frame for wind generating set installs feasibility and desirable damping efficiency.
Particle damping, as a kind of novel passive energy dissipation control technique, has the advantages such as little on the impact of original structure system, associated mass is little, vibration damping Bandwidth, multidimensional control ability are good.During engineering structure vibration, after causing damping particles starting of oscillation, by the collision between damping particles, between particle and container, rub the effect reaching passive energy dissipation.But existing granule damper particle multiple-level stack, limit the probability of the multi-direction rolling of particle or slip, friction and collision, fail at utmost to play the efficiency of granule damper.
Summary of the invention
The object of the present invention is to provide a kind of have tuning, collision double action benzvalene form particle vibration damper.
On the nacelle top that benzvalene form proposed by the invention is tuning, collision particle vibration damper can be arranged on wind tower, inside or tower top inner platform.
Having that the present invention proposes is tuning, the benzvalene form particle vibration damper of collision double action, be made up of container 1, steel ball 2, liquid 3, cover plate 4 and connecting bolt 5, wherein: described container 1 is cylindrical structure, be connected by bottom surface 6 and sidewall 7, container 1 top periphery is provided with a circle upper flange plate 9, bottom periphery is provided with a circle lower flange 8, and described lower flange 8 and upper flange plate 9 are connected with container 1, lower flange 8 and upper flange plate 9 be circumferentially evenly equipped with several bolts hole 10; Several steel balls 2 and liquid 3 is furnished with in container 1; Cover plate 4 is stamped at container 1 top, and described cover plate 4 is connected by connecting bolt 5 with upper flange plate 9; Be fixed on bottom described container 1 in engineering structure 11, lower flange 8 is fixed in engineering structure 11 by connecting bolt; Described bottom surface 6 adopt single curvature sphere or multi-curvature complex-curved, be basin shape; Its curvature of curved surface and steel ball 2 radius design according to requirement of engineering, and steel ball 2 can be made to coincide at container 1 internal vibration frequency, liquid 3 oscillation frequency and engineering structure 11 fundamental vibration frequency in container 1, to reach tuning effect; Container 1 vibrates with engineering structure 11, steel ball 2 and liquid 3 move contrary by effect of inertia with engineering structure 11, produce the inertial force just in time contrary with engineering structure 11 moving direction, phase mutual friction and collision is there is between several steel balls 2, steel ball 2 and the sidewall 7 of container occur to rub and collision, form the effect to engineering structure 11 vibration damping and power consumption under inertial force, friction and collision acting in conjunction.
In the present invention, when adopting many group benzvalene form particle vibration dampers, described container 1 stacks gradually from top to bottom, connecting bolt 5 successively through be positioned at top container lower flange 8 and with it adjacent be positioned at below the upper flange plate 9 of container, two adjacent containers 1 are interconnected, the like, make multiple container be linked as entirety; Bound by cover plate 4 in container 1 top being positioned at top layer, described cover plate 4 is connected with the upper flange plate 9 on the container 1 being positioned at top layer by connecting bolt 5; The described bottom being positioned at the container 1 of bottom is fixed in engineering structure 11, and lower flange 8 is fixed in engineering structure 11 by connecting bolt.
In the present invention, single container 1 is flattened cylindrical shape, and adopt light-weight high-strength material integrally formed, lower flange 8, upper flange plate 9 oppose side wall play reinforing function, and bottom surface 6 is that single curvature sphere or multi-curvature are complex-curved, basin shape seemingly.Its effectiveness in vibration suppression is provided with mutually colliding by the tuning inertial force of steel ball 2, and therefore named benzvalene form is tuning, collision particle vibration damper.
In the present invention, described container 1 adopts in the light-weight high-strength materials such as glass fibre reinforced plastics, metal alloy, PVC or urethane plastic that any one is made, and needs container 1 inside can be lined or arrange different friction factor according to design.
In the present invention, described sphere container 1 floor design is curved surface, can increase steel-ball collision probability, also after can guaranteeing vibration, equilibrium position, bottom surface got back to by steel ball, curvature of curved surface needs to determine according to design, and bottom surface can be single curvature sphere, also can be multi-curvature complex-curved.
In the present invention, arrange several steel balls in described container 1, according to design needs, steel ball radius, surface roughness can be different.
In the present invention, described container diameter can be determined according to blower fan inner platform cat ladder hole and cabin lifting hole(eyelet) size, guarantees that vibration damper is transported to by the inner cat ladder of blower fan pylon or Diao Wu hole, cabin the position needing to install.
Benzvalene form proposed by the invention is tuning, collision particle vibration damper, directionless restriction, blower fan pylon shows as 360 ° of multidirectionals by dynamic excitation vibration, affects steel ball rolling and liquid oscilaltion also shows as 360 ° of multidirectionals, can change direction at any time with tower oscillation by curved bottom.
Accompanying drawing explanation
Fig. 1 is that single benzvalene form is tuning, collision particle vibration damper side view.
Fig. 2 is that multiple benzvalene form is tuning, collision particle vibration damper side view.
Fig. 3 is that benzvalene form is tuning, collision particle vibration damper plan view.
Number in the figure: 1 is container, 2 is steel ball, and 3 is liquid, and 4 is cover plate, 5 be connecting bolt, 6 is bottom surface, 7 is sidewall, 8 is lower flange, 9 is upper flange plate, 10 bolts hole, 11 are for engineering structure.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment 1: as shown in Figure 1, this device is made up of columniform container 1, steel ball 2, liquid 3, cover plate 4, connecting bolt 5, wherein: described container 1 is made up of light-weight high-strength material, be made up of bottom surface 6, sidewall 7, lower flange 8 and upper flange plate 9, circumferentially several bolts hole 10 uniform on upper flange plate 9 and lower flange 8.Connecting bolt 5 successively through lower flange 8 and the engineering structure 11 of container 1, makes container 1 be horizontally fixed in engineering structure 11 from top to bottom.Multiple steel ball 2 and appropriate amount of fluid 3 is arranged in container 1.As Fig. 2, during multiple container stack, connecting bolt 5 through the lower flange 8 of upper container and the upper flange plate 9 of lower reservoir, makes multiple container be linked as entirety up and down successively.Top container 1 is bound by cover plate 4, is connected successively by connecting bolt 5 through the upper flange plate 9 of container 1 with cover plate 4.
The present invention is applicable to that the benzvalene form of blower fan pylon is tuning, collision particle vibration damper.During use, first according to the inside free space of cabin and platform, determine the placement location of vibration damper, determine arrangement.Calculate or test the dynamic property of the blower fan pylon intending mounting dampers, determine its fundamental frequency.Due to the natural frequency of vibration of vibration damper and the fundamental frequency of blower fan pylon almost equal time effectiveness in vibration suppression best, determine the rolling frequency of steel ball in vibration damper or the oscillation frequency of liquid thus.The effectiveness in vibration suppression reached is wanted, when spin or liquid quality are taken as 1.5% ~ 2.5% of blower fan pylon single order modal mass according to expection.In container, steel ball is set as several, and making has the possibility collided between steel ball particle, between particle and container, is calculated radius and container 4 radius of steel ball 2 by steel ball quality and quantity; According to required steel ball gross mass, determine the quantity of container 4.Equally, when in container 1, quality is liquid 3, similar to single pendulum for guaranteeing the motion of liquid 3 in container 1, liquid level height must not be greater than 1/3 spherical radius, determines the quantity of required container 4 thus.According to the making determining design parameter and complete container 1, and be fixed to the predeterminated position of engineering structure 11 by connecting bolt 5.
Using method of the present invention is as follows:
1., according to the permission usage space of fan engine room in Practical Project and platform, determine vibration damper form;
2. calculate or test the fundamental frequency of blower fan pylon;
3. the principle that time consistent with structure fundamental frequency according to steel ball rolling frequency, effectiveness in vibration suppression is best, determines that benzvalene form is tuning, the collision particle vibration damper natural frequency of vibration;
4., according to the effectiveness in vibration suppression preset, determine the gross mass of rolling steel balls or liquid;
5. according to vibration damper natural frequency of vibration determination vessel radius, steel ball radius or liquid level height;
6., according to steel ball radius or liquid quality, determine the quantity of container;
7. make vibration damper by design parameter and be arranged on fan engine room top, inside or tower top inner platform.

Claims (3)

1. have tuning, the benzvalene form particle vibration damper of collision double action, by container (1), steel ball (2), liquid (3), cover plate (4) and connecting bolt (5) composition, it is characterized in that: described container (1) is cylindrical structure, be connected by bottom surface (6) and sidewall (7), container (1) top periphery is provided with a circle upper flange plate (9), bottom periphery is provided with a circle lower flange (8), described lower flange (8) and upper flange plate (9) are connected with container (1), lower flange (8) and upper flange plate (9) be circumferentially evenly equipped with several bolts hole (10), several steel balls (2) and liquid (3) is furnished with in container (1), cover plate (4) is stamped at container (1) top, and described cover plate (4) is connected by connecting bolt (5) with upper flange plate (9), described container (1) bottom is fixed in engineering structure (11), and lower flange (8) is fixed in engineering structure (11) by connecting bolt, described bottom surface (6) adopt single curvature sphere or multi-curvature complex-curved, be basin shape, its curvature of curved surface and steel ball (2) radius design according to requirement of engineering, steel ball (2) can be made to coincide at container (1) internal vibration frequency, liquid (3) oscillation frequency and engineering structure (11) fundamental vibration frequency in container (1), to reach tuning effect, container (1) vibrates with engineering structure (11), steel ball (2) and liquid (3) move contrary by effect of inertia with engineering structure (11), produce the inertial force just in time contrary with engineering structure (11) moving direction, phase mutual friction and collision is there is in several steel balls between (2), steel ball (2) and the sidewall (7) of container occur to rub and collision, form the effect to engineering structure (11) vibration damping and power consumption under inertial force, friction and collision acting in conjunction.
2. according to claim 1 have benzvalene form particle vibration damper that is tuning, collision double action, it is characterized in that when adopting many group benzvalene form particle vibration dampers, described container (1) stacks gradually from top to bottom, connecting bolt (5) successively through be positioned at top container lower flange (8) and with it adjacent be positioned at below the upper flange plate (9) of container, two adjacent containers (1) are interconnected, the like, make multiple container be linked as entirety; Bound by cover plate (4) in container (1) top being positioned at top layer, described cover plate (4) is connected with the upper flange plate (9) on the container (1) being positioned at top layer by connecting bolt (5); The described bottom being positioned at the container (1) of bottom is fixed in engineering structure (11), and lower flange (8) is fixed in engineering structure (11) by connecting bolt.
3. according to claim 1 have benzvalene form particle vibration damper that is tuning, collision double action, it is characterized in that described container (1) adopts in glass fibre reinforced plastics, metal alloy, PVC or urethane plastic that any one is made, need container (1) inner lined or different friction factor is set according to design.
CN201610035595.3A 2016-01-20 2016-01-20 Basin type particle shock absorber with dual functions of tuning and collision Pending CN105443634A (en)

Priority Applications (1)

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CN201610035595.3A CN105443634A (en) 2016-01-20 2016-01-20 Basin type particle shock absorber with dual functions of tuning and collision

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111549925A (en) * 2020-04-16 2020-08-18 重庆大学 Composite liquid-particle tuned damping device for vibration reduction of wind power structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269988B (en) * 1992-08-24 1996-04-24 Frederick Yik Shiong Kwoh Acoustic damping device
CN1180800A (en) * 1996-10-22 1998-05-06 三菱重工业株式会社 Self-tuning type vibration damping apparatus
CN202040268U (en) * 2011-04-25 2011-11-16 同济大学 Damping device and high wind power generation tower using same
CN202493618U (en) * 2012-03-05 2012-10-17 北京工业大学 Partition type lamination particle damper
CN103557266A (en) * 2013-10-25 2014-02-05 同济大学 Multilayer spherical container damper
CN205533947U (en) * 2016-01-20 2016-08-31 上海风畅土木工程技术有限公司 Benzvalene form granule shock absorber with harmonious, collision dual function

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269988B (en) * 1992-08-24 1996-04-24 Frederick Yik Shiong Kwoh Acoustic damping device
CN1180800A (en) * 1996-10-22 1998-05-06 三菱重工业株式会社 Self-tuning type vibration damping apparatus
CN202040268U (en) * 2011-04-25 2011-11-16 同济大学 Damping device and high wind power generation tower using same
CN202493618U (en) * 2012-03-05 2012-10-17 北京工业大学 Partition type lamination particle damper
CN103557266A (en) * 2013-10-25 2014-02-05 同济大学 Multilayer spherical container damper
CN205533947U (en) * 2016-01-20 2016-08-31 上海风畅土木工程技术有限公司 Benzvalene form granule shock absorber with harmonious, collision dual function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111549925A (en) * 2020-04-16 2020-08-18 重庆大学 Composite liquid-particle tuned damping device for vibration reduction of wind power structure

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Application publication date: 20160330