CN203641390U - Multilayer spherical container damper - Google Patents

Multilayer spherical container damper Download PDF

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Publication number
CN203641390U
CN203641390U CN201320663658.1U CN201320663658U CN203641390U CN 203641390 U CN203641390 U CN 203641390U CN 201320663658 U CN201320663658 U CN 201320663658U CN 203641390 U CN203641390 U CN 203641390U
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CN
China
Prior art keywords
container
liquid
containers
damper
radius
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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.)
Expired - Fee Related
Application number
CN201320663658.1U
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Chinese (zh)
Inventor
陈俊岭
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Tongji University
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Tongji University
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Filing date
Publication date
Application filed by Tongji University filed Critical Tongji University
Priority to CN201320663658.1U priority Critical patent/CN203641390U/en
Application granted granted Critical
Publication of CN203641390U publication Critical patent/CN203641390U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • Y02E10/722

Abstract

The utility model relates to a multilayer spherical container damper. The multilayer spherical container damper comprises a fixed bracket, steel balls, liquid, containers and bolts, wherein the containers adopt spherical containers; the containers are sequentially arranged on the fixed bracket from the top to the bottom; any one or the combination of the steel balls and the liquid is arranged in every container; the fixed bracket is fixed above the structure through the bolts; the rolling frequency of the steel balls in the containers is determined by the radius of the containers and the radius of the steel balls; the oscillating frequency of the liquid in the containers is determined by the liquid level and the radius of the containers; the masses of the steel balls and the liquid are determined by the expected vibration reducing effect, and are 1.5-2.5% of the first-order modal mass of a wind power generation tower; when the rolling frequency of the steel balls or the oscillating frequency of the liquid is almost completely the same as the natural vibration frequency of the structure, the control effect is better, and the radius of the spherical containers, the radius of the steel balls and the liquid level are determined. The multilayer spherical container damper is simple in structure and novel in conception.

Description

Polytrope surface vessel damper
Technical field
The utility model belongs to technical field of structural engineering, is specifically related to a kind of polytrope surface vessel damper.
Background technique
Along with the continuous growth of the comsumption of natural resources, energy problem has become the huge challenge that countries in the world are faced jointly.And there are abundant wind energy resources and wide smooth region in sea, make wind power technology become the focus of Recent study and application.For obtaining larger electrical production ability, offshore wind turbine single-machine capacity constantly increases, and size and the weight of blower fan all increase considerably, and for the parts such as cabin and impeller being lifted to the operation of design height place, needs to adopt higher support tower.But for land wind-power electricity generation, Oversea wind power generation tower pylon should bear very strong wind load, also can be subject to comprising the effects such as the ground motion of wave, stream and seismic region and the ice in northern marine site shake.Pylon, as elongated tall and slender structure, vibrates under wind load and wave effect, and the maximum harm of tower cylinder vibration is exactly that tower cylinder connection part and some cabin components on it are produced is tired, and the intensity of pylon material reduces greatly, shortens pylon working life.How under this special environment, to reduce efficiently, economically the vibration of structure, become a major issue in wind generating technology.If adopt the method that increases structure self rigidity, utilize self-ability to carry out dissipates vibration energy, as strengthened the sectional dimension of member or the strength grade of raising material etc., this method is both uneconomical, has again larger problem.Be provided with the accessories such as cable, safety line, cat ladder, platform due to wind power tower drum inside, on space, do not allow to install at tower cylinder top the TMD of several tons of weights, the utility model proposes a kind of polytrope surface vessel damper being arranged on wind power generation stepped, by the appropriate design to quality in vessel radius and container, make the vibration frequency of quality and the tuning vibration damping of realizing of the vibration frequency of structure in container.
Summary of the invention
The purpose of this utility model is to provide a kind of simple structure, the polytrope surface vessel damper that easy for installation, fabricating cost is cheap.
The polytrope surface vessel damper that the utility model proposes can be arranged on wind power generation stepped nacelle top, inside or tower top inner platform, can be designed as multi-form according to the size of installing space.In the time that installing space is unrestricted, sphere container can be designed to hemisphere, supported by multilayer fixed support, in container quality can be in container Free Slosh significantly; In the time that installing space is restricted, container can be designed to bottom surface sphere, the upright form of sidewall, and in container, quality can unrestricted motion within the scope of sphere.In container, quality can adopt steel ball, also can adopt liquid alternative.When the interior steel ball number less (be less than and equal 3) of monolayered vessel, the athletic performance of steel ball in container is for rolling, and when steel ball number more (more than 6), the athletic performance of steel ball in container is for sliding; While placing liquid in container, when liquid level height be less than spherical radius 1/3 time, the single pendulum that the motion of liquid in sphere container is spherical radius with pendulum length, shows as slip.
The polytrope surface vessel damper that the utility model proposes, formed by fixed support 1, steel ball 2, liquid 3, container 4 and bolt 5, wherein: described container 4 adopts sphere container, several containers 4 are positioned on fixed support 1 from top to bottom successively, each container 4 is interior arranges in steel ball 2 or liquid 3 any or its combination, and described fixed support 1 is fixed on superstructure by bolt 5; The rolling frequency of steel ball in container determined jointly by vessel radius and steel ball radius, the oscillation frequency of liquid in container determined by liquid level height and vessel radius, the effectiveness in vibration suppression that steel ball and liquid quality reach according to expection is definite, and quality is got 1.5% ~ 2.5% of wind power generation stepped single order modal mass; In the time that the natural frequency of vibration of steel ball rolling frequency or liquid oscilaltion frequency and structure is almost in full accord, control effect better, determine thus sphere vessel radius, steel ball radius and liquid level height.
In the utility model, described fixed support and sphere container can adopt in the light-weight high-strength materials such as glass fibre reinforced plastics, PVC or urethane plastic any.
In the utility model, described sphere inner surface of container is sphere.
In the utility model, steel ball 2 quantity in described each container 4 are 3-6.
In the utility model, the liquid levels height of described each container 4 interior placements is less than vessel radius 1/3.
The polytrope surface vessel spin damper that the utility model proposes and general tuned mass damper are different, although wind turbine tower is in wind action lower stress complexity, the direction of vibration of spin and the orientation of oscillation of liquid can be adjusted at any time according to tower oscillation direction.Friction factor adjustment between steel ball or liquid and sphere container can be by processing realization to the roughness of container bottom, and coating butter can reduce the friction factor between steel ball and container, and steel ball rolling amplitude in container can increase; Stickup nylon net cloth etc. can increase the friction factor between liquid and container, reduces the oscillation amplitude of liquid in container.
Accompanying drawing explanation
Fig. 1 is the damper device schematic diagram that in container, quality is steel ball, can be arranged on nacelle top.
Fig. 2 is the damper device schematic diagram that in container, quality is liquid, can be arranged on nacelle top.
Fig. 3 is that in container, quality is the damper device schematic diagram of liquid and steel ball, can be arranged on nacelle top.
Fig. 4 is that in container, quality is spin damper device schematic diagram, can be arranged on engine room inside or tower top inner platform.
Number in the figure: 1 is fixed support, 2 is steel ball, and 3 is liquid, and 4 is container, and 5 is bolt.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated.
Embodiment 1: the utility model is to be applicable to wind power generation stepped polytrope surface vessel damper.In actual use, first according to the inside free space of cabin and platform, determine the placement location of damper, thereby determine the damper form shown in Fig. 1 ~ Fig. 4 of selecting.The wind power generation stepped dynamic property of intending installation damper is tested, determine its single order natural frequency of vibration.Due to the natural frequency of vibration of damper and the wind power generation stepped single order natural frequency of vibration effectiveness in vibration suppression when almost equal best, determine thus the rolling frequency of spin in damper or the oscillation frequency of liquid.Want the effectiveness in vibration suppression reaching according to expection, spin or liquid quality be taken as wind power generation stepped single order modal mass 1.5% ~ 2.5% time, effectiveness in vibration suppression can reach 20% ~ 30%.For guaranteeing that the motion of spin in container is for sliding, in individual layer damper, the quantity of steel ball 2 can be designed to 3-6, calculates thus radius and container 4 radiuses of steel ball 2; According to needed steel ball gross mass, determine the number of plies of container 4.When in same container, quality is liquid 3, similar to single pendulum for guaranteeing the motion of liquid 3 in container, liquid level height must not be greater than 1/3 spherical radius, determines thus the number of plies of required container 4.According to the quality of spin or liquid in every layer of container, design fixed support 1.Thus, complete the making of polytrope surface vessel spin damper according to determining design parameter, and be fixed to predeterminated position by construction bolt 5.
Using method of the present utility model is as follows:
1. according to the permission usage space of wind power generation stepped cabin and platform in Practical Project, determine damper form;
2. the wind power generation stepped single order natural frequency of vibration of actual measurement;
3. when consistent with natural frequency of structures according to spin rolling frequency, the best principle of effectiveness in vibration suppression, determines the polytrope surface vessel damper natural frequency of vibration;
4. according to default effectiveness in vibration suppression, determine the gross mass of rolling steel balls or liquid;
5. determine vessel radius, steel ball radius and liquid level height according to the damper natural frequency of vibration;
6. according to steel ball radius or liquid quality, determine the number of plies of container;
7. make damper and be arranged on wind power generation stepped nacelle top, inside or tower top inner platform by design parameter.

Claims (4)

1. a polytrope surface vessel damper, formed by fixed support (1), steel ball (2), liquid (3), container (4) and bolt (5), it is characterized in that: described container (4) adopts sphere container, several containers (4) are positioned on fixed support (1) from top to bottom successively, any or its combination is set in each container (4) in steel ball (2) or liquid (3), and described fixed support (1) is fixed on superstructure by bolt (5).
2. polytrope surface vessel damper according to claim 1, is characterized in that described sphere container is hemispherical dome structure.
3. polytrope surface vessel damper according to claim 1, is characterized in that steel ball (2) quantity in described each container (4) is 3-6.
4. polytrope surface vessel damper according to claim 1, is characterized in that the liquid levels height of placing in described each container (4) is less than vessel radius 1/3.
CN201320663658.1U 2013-10-25 2013-10-25 Multilayer spherical container damper Expired - Fee Related CN203641390U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320663658.1U CN203641390U (en) 2013-10-25 2013-10-25 Multilayer spherical container damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320663658.1U CN203641390U (en) 2013-10-25 2013-10-25 Multilayer spherical container damper

Publications (1)

Publication Number Publication Date
CN203641390U true CN203641390U (en) 2014-06-11

Family

ID=50872637

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320663658.1U Expired - Fee Related CN203641390U (en) 2013-10-25 2013-10-25 Multilayer spherical container damper

Country Status (1)

Country Link
CN (1) CN203641390U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105569206A (en) * 2016-02-26 2016-05-11 苏州云白环境设备制造有限公司 Annular liquid damper
CN106088378A (en) * 2016-06-13 2016-11-09 同济大学 Anti-fall damping screen annular Tuned Liquid of collapsing
CN110439348A (en) * 2019-08-26 2019-11-12 上海电气风电集团有限公司 A kind of compound liquid condenser and application method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105569206A (en) * 2016-02-26 2016-05-11 苏州云白环境设备制造有限公司 Annular liquid damper
CN106088378A (en) * 2016-06-13 2016-11-09 同济大学 Anti-fall damping screen annular Tuned Liquid of collapsing
CN110439348A (en) * 2019-08-26 2019-11-12 上海电气风电集团有限公司 A kind of compound liquid condenser and application method
CN110439348B (en) * 2019-08-26 2020-10-02 上海电气风电集团股份有限公司 Composite liquid damper and use method thereof

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140611

Termination date: 20161025

CF01 Termination of patent right due to non-payment of annual fee