CN111549925A - Composite liquid-particle tuned damping device for vibration reduction of wind power structure - Google Patents

Composite liquid-particle tuned damping device for vibration reduction of wind power structure Download PDF

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Publication number
CN111549925A
CN111549925A CN202010299536.3A CN202010299536A CN111549925A CN 111549925 A CN111549925 A CN 111549925A CN 202010299536 A CN202010299536 A CN 202010299536A CN 111549925 A CN111549925 A CN 111549925A
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CN
China
Prior art keywords
shell
damping
liquid
tower
tuned
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Inventor
白久林
李晨辉
龚彦安
王宇航
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Chongqing University
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Chongqing University
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Priority to CN202010299536.3A priority Critical patent/CN111549925A/en
Publication of CN111549925A publication Critical patent/CN111549925A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/98Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate
    • E04H9/02Buildings, or groups of buildings, or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake, extreme climate withstanding earthquake or sinking of ground
    • E04H9/021Bearing, supporting or connecting constructions specially adapted for such buildings

Abstract

The invention discloses a composite liquid-particle tuned damping device for vibration reduction of a wind power structure. The inner shell is arranged in the outer shell, and a plurality of particle balls are arranged in the inner shell. Viscous liquid is filled between the inner shell and the outer shell. The installation form, the position and the number of the devices can be determined according to the actual condition of the wind-power tower, when the tower barrel vibrates, the viscous liquid generates a reverse inertia effect, the energy of the tower barrel is consumed due to the head loss and the interaction between the liquid and the outer wall, the effect of the tuned liquid damping system is exerted, the inner shell submerged in the viscous liquid compresses the space for the movement of the liquid, the damping of the tuned liquid damping system is improved, and the control capability is enhanced; meanwhile, the particle balls in the inner shell perform energy dissipation and vibration reduction through rolling, friction and collision, so that the efficiency of the rolling type tuned mass damping system is achieved; the two systems are supported and matched with each other, and have the advantages of wide response frequency band and sensitive reaction, and better vibration reduction effect in all directions.

Description

Composite liquid-particle tuned damping device for vibration reduction of wind power structure
Technical Field
The invention relates to the field of vibration control of civil engineering structures, in particular to a damping device used in a wind power structure.
Background
With the economic prosperity and the scientific and technological development of China, energy has become an important foundation for the current social progress. The back of the sudden and violent advancement of our country is the massive exploitation and utilization of energy, which causes serious environmental problems. Therefore, the development of green and environment-friendly new energy becomes an important way for the nation to solve the problem of environmental resources. Wind energy resources in China are rich, the influence on the environment is low, and the capacity is high, so that wind power generation becomes a new trend of energy development and utilization.
The wind motor is a high-rise structure and faces a severe load environment all the time. Wherein lateral loads, especially wind loads, can cause severe vibration problems in the structure, leading to fatigue damage or even destruction of the structure. Therefore, vibration control of wind power structures is an urgent problem to be solved. The effectiveness of the tuned mass damper in controlling the structural vibration is proved in many documents, but the defects of narrow vibration damping frequency band, large occupied space and the like make the tuned mass damper difficult to be an ideal scheme for vibration damping of a wind power structure. The tuned liquid column damper has the advantages of simple structure, economy and sensitivity to vibration, but also has the problem of space utilization. Therefore, it is necessary to develop a new type of high-efficiency damper.
Disclosure of Invention
The invention aims to provide a composite liquid-particle tuned damper for damping of a wind power structure.
The technical scheme adopted for achieving the aim of the invention is that the composite liquid-particle tuned damping device for damping the vibration of the wind power structure comprises an outer shell, an inner shell, viscous liquid, particle balls and a sealing plate.
The shell is a vertically arranged cylinder structure, the interior of the shell is hollow, the upper end of the shell is closed, and the lower end of the shell is open. The closing plate is connected with the lower end opening of the shell in a sealing way.
The inner shell is installed in the shell, and the inner shell is the cylinder structure of vertical setting, and the inside cavity of inner shell, the upper end of inner shell is uncovered, and the lower extreme is sealed. The hollow part of the inner shell is marked as an inner cavity S, and a plurality of particle balls are arranged in the inner cavity S.
The upper end of the inner shell is connected to the top plate of the outer shell, and a gap is formed between the lower end of the inner shell and the sealing plate. An outer cavity H is formed between the outer wall of the inner shell and the inner wall of the outer shell, viscous liquid is filled in the outer cavity H, the lower end of the inner shell is soaked in the viscous liquid, and a gap is formed between the liquid level of the viscous liquid and the top plate of the outer shell.
Further, the bottom of the inner shell is a spherical curved surface which is concave downwards.
The invention has the beneficial effects that:
1. the device is suitable for controlling the vibration of onshore wind power towers and offshore wind power towers, and has wide application range;
2. the device of the invention has flexible installation mode and arrangement form: different forms such as floor type or suspension type can be selected according to the internal space of the wind power structure, the wind power structure can be sequentially arranged on the platform in the tower along the height direction of the tower, and the arrangement distance and the number are determined by actual control requirements; a plurality of the tower cylinders are uniformly arranged along the circumference of the circular section of the tower cylinder at the same horizontal height, or the tower cylinders are singly arranged at the same horizontal height;
3. when the tower barrel vibrates, the viscous liquid in the device can generate a reverse inertia effect, the energy of the tower barrel is consumed through the interaction between the head loss and the viscous liquid and the outer shell to form a tuned liquid damping system, the inner shell submerged in the viscous liquid compresses the space for the movement of the viscous liquid, the damping of the tuned liquid damping system is improved, and the control capability is enhanced; meanwhile, the particle balls in the inner shell are subjected to energy dissipation and vibration reduction through rolling, friction and collision to form a rolling type tuned mass damping system;
4. the tuned liquid damping system can adjust the frequency according to the depth of the viscous liquid, the size of the outer shell and the size of the inner shell, and the rolling tuned mass damping system can adjust the frequency by changing the curvature of the spherical curved surface at the bottom of the inner shell and the radius of the particle balls and adjust the number, the roughness and the friction coefficient of the particle balls according to engineering requirements;
5. the device has wide response frequency band and sensitive response, has excellent vibration reduction effect, and avoids the defects of narrow vibration reduction frequency band and slow response of the tuned mass damper.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
FIG. 2 is a schematic view of the apparatus of the present invention installed in a floor-type manner in a tower of an onshore wind power tower;
FIG. 3 is a uniform distribution of a plurality of devices of the present invention on the same inner platform of a tower;
FIG. 4 is a schematic view of the apparatus of the present invention installed in a floor-standing manner in the nacelle of a land-based wind tower;
FIG. 5 is a schematic view of the connection rings, the wire rope and the device of the present invention;
FIG. 6 is a schematic illustration of the inventive apparatus mounted suspended within the nacelle of an onshore wind tower;
FIG. 7 is a schematic view of the apparatus of the present invention mounted suspended atop the tower of an onshore wind tower;
FIG. 8 is a schematic view of the apparatus of the present invention mounted suspended within the tower of an onshore wind tower;
FIG. 9 is a schematic view of the apparatus of the present invention installed in a floor standing manner within the tower of an offshore wind tower.
In the figure: the device comprises an outer shell 1, an inner shell 2, a viscous liquid 3, granular balls 4, a sealing plate 5, a connecting ring 6, a steel wire rope 7, a tower 8, an inner platform 801 and a cabin 9.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses a composite liquid-particle tuned damping device for damping wind power structures, which comprises an outer shell 1, an inner shell 2, viscous liquid 3, particle balls 4 and a sealing plate 5.
Referring to fig. 1, the housing 1 is a vertically arranged cylindrical structure, the interior of the housing 1 is hollow, the upper end of the housing 1 is closed, and the lower end of the housing is open. The closing plate 5 is connected with the lower end opening of the shell 1 in a sealing way.
In shell 1 was installed to inner shell 2, inner shell 2 was the cylinder structure of vertical setting, and the inside cavity of inner shell 2, the upper end of inner shell 2 is uncovered, and the lower extreme is sealed, and the bottom of inner shell 2 is the spherical curved surface of undercut. The hollow part of the inner shell 2 is marked as an inner cavity S, and a plurality of granular balls 4 are arranged in the inner cavity S.
The granular balls 4 can be made of different materials and have different densities according to specific engineering requirements, such as steel balls, shot balls, rubber balls and the like. The radius and roughness of the particle balls 4 are determined by actual control and energy consumption requirements.
Referring to fig. 1, the inner case 2 is connected to the top plate of the outer case 1 at its upper end, and has a gap with the closing plate 5 at its lower end. An outer cavity H is formed between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, viscous liquid 3 is filled in the outer cavity H, the lower end of the inner shell 2 is soaked in the viscous liquid 3, and a gap is formed between the liquid level of the viscous liquid 3 and the top plate of the outer shell 1.
Referring to fig. 2, the damping device disclosed in this embodiment is installed in a floor type on a land-based wind power tower, where the wind power tower includes a tower 8 and a nacelle 9, the lower end of the tower 8 is fixed on the land, the upper end of the tower is provided with the nacelle 9, and one end of the nacelle 9 is provided with a wind power blade. A plurality of inner platforms 801 are arranged in the tower tube 8, and the inner platforms 801 are arranged at equal intervals along the height direction of the tower tube 8. One or a plurality of damping devices are arranged on the upper surface of each inner platform 801, and the number of the damping devices on each inner platform 801 is determined by actual engineering requirements. Referring to fig. 3, when a plurality of damping devices are disposed on each of the inner platforms 801, the plurality of damping devices are annularly arranged around a midpoint of the inner platform 801, and the plurality of damping devices are equally spaced.
Once the tower barrel 8 vibrates, the viscous liquid 3 can generate a reverse inertia effect to generate head loss, the viscous liquid 3 interacts with the outer shell 1, the viscous liquid 3 interacts with the inner shell 2, accordingly, energy of the tower barrel 8 is consumed, a tuned liquid damping system is formed to play a role, the inner shell 2 submerged in the viscous liquid 3 compresses a movement space of the viscous liquid 3, damping of the tuned liquid damping system is improved, and control capacity is enhanced. Meanwhile, the particle balls 4 in the inner shell 2 are subjected to energy dissipation and vibration reduction through rolling, friction and collision to form a rolling type tuned mass damping system to play a role. When the tower drum 8 vibrates, the tuned liquid damping system and the rolling tuned mass damping system are not limited in direction, and the direction of the tuned liquid damping system and the direction of the rolling tuned mass damping system are changed along with the vibration of the tower drum 8 at any time.
The tuned liquid damping system of the embodiment can adjust the frequency according to the depth of the viscous liquid 3, the size of the outer shell 1 and the size of the inner shell 2, and the rolling tuned mass damping system can adjust the frequency by adjusting the curvature of the spherical curved surface at the bottom of the inner shell 2 and the radius of the particle balls 4 and adjust the number, the roughness and the friction coefficient of the particle balls 4 according to engineering requirements.
The damping device disclosed in this embodiment is designed as follows:
1. and determining the installation position of the damping device and selecting the form of the damping device according to the actual space condition of the tower 8.
2. And measuring and calculating the structural natural vibration frequency of the tower drum 8.
3. The mass of the particle ball 4 in the rolling type tuned mass damping system is determined according to the self-vibration frequency of the structure, the depth of the inner shell 2, the curvature of the bottom, the depth of the outer shell 1, the mass of the viscous liquid 3 and the like.
4. The required number is determined and the arrangement is arranged according to the mass of the damping device.
Example 2:
the embodiment discloses a composite liquid-particle tuned damping device for damping wind power structures, which comprises an outer shell 1, an inner shell 2, viscous liquid 3, particle balls 4 and a sealing plate 5.
Referring to fig. 1, the housing 1 is a vertically arranged cylindrical structure, the interior of the housing 1 is hollow, the upper end of the housing 1 is closed, and the lower end of the housing is open. The closing plate 5 is connected with the lower end opening of the shell 1 in a sealing way.
In shell 1 was installed to inner shell 2, inner shell 2 was the cylinder structure of vertical setting, and the inside cavity of inner shell 2, the upper end of inner shell 2 is uncovered, and the lower extreme is sealed, and the bottom of inner shell 2 is the spherical curved surface of undercut. The hollow part of the inner shell 2 is marked as an inner cavity S, and a plurality of granular balls 4 are arranged in the inner cavity S.
Referring to fig. 1, the inner case 2 is connected to the top plate of the outer case 1 at its upper end, and has a gap with the closing plate 5 at its lower end. An outer cavity H is formed between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, viscous liquid 3 is filled in the outer cavity H, the lower end of the inner shell 2 is soaked in the viscous liquid 3, and a gap is formed between the liquid level of the viscous liquid 3 and the top plate of the outer shell 1.
Referring to fig. 4, the damping device disclosed in this embodiment is installed in a floor type on a land-based wind power tower, where the wind power tower includes a tower 8 and a nacelle 9, the lower end of the tower 8 is fixed on the land, the upper end of the tower is provided with the nacelle 9, and one end of the nacelle 9 is provided with a wind power blade. And a damping device is arranged at the bottom of the inner cavity of the cabin 9.
Once the wind power tower vibrates, the viscous liquid 3 can generate a reverse inertia effect to generate head loss, the viscous liquid 3 interacts with the outer shell 1, the viscous liquid 3 interacts with the inner shell 2, accordingly, energy of the wind power tower is consumed, a tuned liquid damping system is formed to play a role, the inner shell 2 submerged in the viscous liquid 3 compresses a movement space of the viscous liquid 3, damping of the tuned liquid damping system is improved, and control capacity is enhanced. Meanwhile, the particle balls 4 in the inner shell 2 are subjected to energy dissipation and vibration reduction through rolling, friction and collision to form a rolling type tuned mass damping system to play a role. When the wind power tower vibrates, the tuned liquid damping system and the rolling tuned mass damping system are not limited in direction, and the direction of the tuned liquid damping system and the direction of the rolling tuned mass damping system are changed along with the vibration of the wind power tower at any time.
The tuned liquid damping system of the embodiment can adjust the frequency according to the depth of the viscous liquid 3, the size of the outer shell 1 and the size of the inner shell 2, and the rolling tuned mass damping system can adjust the frequency by adjusting the curvature of the spherical curved surface at the bottom of the inner shell 2 and the radius of the particle balls 4 and adjust the number, the roughness and the friction coefficient of the particle balls 4 according to engineering requirements.
Example 3:
the embodiment discloses a composite liquid-particle tuned damping device for damping wind power structures, which comprises an outer shell 1, an inner shell 2, viscous liquid 3, particle balls 4 and a sealing plate 5.
Referring to fig. 1 or 5, the housing 1 is a vertically arranged cylindrical structure, the interior of the housing 1 is hollow, the upper end of the housing 1 is closed, and the lower end of the housing is open. The closing plate 5 is connected with the lower end opening of the shell 1 in a sealing way.
In shell 1 was installed to inner shell 2, inner shell 2 was the cylinder structure of vertical setting, and the inside cavity of inner shell 2, the upper end of inner shell 2 is uncovered, and the lower extreme is sealed, and the bottom of inner shell 2 is the spherical curved surface of undercut. The hollow part of the inner shell 2 is marked as an inner cavity S, and a plurality of granular balls 4 are arranged in the inner cavity S.
Referring to fig. 1 or 5, the inner case 2 is connected to the top plate of the outer case 1 at its upper end, and has a gap with the closing plate 5 at its lower end. An outer cavity H is formed between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, viscous liquid 3 is filled in the outer cavity H, the lower end of the inner shell 2 is soaked in the viscous liquid 3, and a gap is formed between the liquid level of the viscous liquid 3 and the top plate of the outer shell 1.
Referring to fig. 5, a plurality of connection rings 6 are connected to the upper surface of the housing 1, and each connection ring 6 is connected to a wire rope 7.
Referring to fig. 6, the damping device disclosed in this embodiment is mounted on a land-based wind tower in a suspended manner, the wind tower includes a tower 8 and a nacelle 9, the lower end of the tower 8 is fixed on the land, the upper end of the tower is provided with the nacelle 9, and one end of the nacelle 9 is provided with a wind blade. The upper ends of a plurality of said steel cables 7 are connected to the top of the inner cavity of the nacelle 9.
Once the wind power tower vibrates, the viscous liquid 3 can generate a reverse inertia effect to generate head loss, the viscous liquid 3 interacts with the outer shell 1, the viscous liquid 3 interacts with the inner shell 2, accordingly, energy of the wind power tower is consumed, a tuned liquid damping system is formed to play a role, the inner shell 2 submerged in the viscous liquid 3 compresses a movement space of the viscous liquid 3, damping of the tuned liquid damping system is improved, and control capacity is enhanced. Meanwhile, the particle balls 4 in the inner shell 2 are subjected to energy dissipation and vibration reduction through rolling, friction and collision to form a rolling type tuned mass damping system to play a role. When the wind power tower vibrates, the tuned liquid damping system and the rolling tuned mass damping system are not limited in direction, and the direction of the tuned liquid damping system and the direction of the rolling tuned mass damping system are changed along with the vibration of the wind power tower at any time.
The tuned liquid damping system of the embodiment can adjust the frequency according to the depth of the viscous liquid 3, the size of the outer shell 1 and the size of the inner shell 2, and the rolling tuned mass damping system can adjust the frequency by adjusting the curvature of the spherical curved surface at the bottom of the inner shell 2 and the radius of the particle balls 4 and adjust the number, the roughness and the friction coefficient of the particle balls 4 according to engineering requirements.
Example 4:
the embodiment discloses a composite liquid-particle tuned damping device for damping wind power structures, which comprises an outer shell 1, an inner shell 2, viscous liquid 3, particle balls 4 and a sealing plate 5.
Referring to fig. 1 or 5, the housing 1 is a vertically arranged cylindrical structure, the interior of the housing 1 is hollow, the upper end of the housing 1 is closed, and the lower end of the housing is open. The closing plate 5 is connected with the lower end opening of the shell 1 in a sealing way.
In shell 1 was installed to inner shell 2, inner shell 2 was the cylinder structure of vertical setting, and the inside cavity of inner shell 2, the upper end of inner shell 2 is uncovered, and the lower extreme is sealed, and the bottom of inner shell 2 is the spherical curved surface of undercut. The hollow part of the inner shell 2 is marked as an inner cavity S, and a plurality of granular balls 4 are arranged in the inner cavity S.
Referring to fig. 1 or 5, the inner case 2 is connected to the top plate of the outer case 1 at its upper end, and has a gap with the closing plate 5 at its lower end. An outer cavity H is formed between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, viscous liquid 3 is filled in the outer cavity H, the lower end of the inner shell 2 is soaked in the viscous liquid 3, and a gap is formed between the liquid level of the viscous liquid 3 and the top plate of the outer shell 1.
Referring to fig. 5, a plurality of connection rings 6 are connected to the upper surface of the housing 1, and each connection ring 6 is connected to a wire rope 7.
Referring to fig. 7, the damping device disclosed in this embodiment is mounted on a land-based wind tower in a suspended manner, the wind tower includes a tower 8 and a nacelle 9, the lower end of the tower 8 is fixed on the land, the upper end of the tower is provided with the nacelle 9, and one end of the nacelle 9 is provided with a wind blade. The upper ends of the steel wire ropes 7 are connected to the lower surface of the outer wall of the engine room 9, and the damping device is suspended at the upper end of the tower barrel 8.
Once the wind power tower vibrates, the viscous liquid 3 can generate a reverse inertia effect to generate head loss, the viscous liquid 3 interacts with the outer shell 1, the viscous liquid 3 interacts with the inner shell 2, accordingly, energy of the wind power tower is consumed, a tuned liquid damping system is formed to play a role, the inner shell 2 submerged in the viscous liquid 3 compresses a movement space of the viscous liquid 3, damping of the tuned liquid damping system is improved, and control capacity is enhanced. Meanwhile, the particle balls 4 in the inner shell 2 are subjected to energy dissipation and vibration reduction through rolling, friction and collision to form a rolling type tuned mass damping system to play a role. When the wind power tower vibrates, the tuned liquid damping system and the rolling tuned mass damping system are not limited in direction, and the direction of the tuned liquid damping system and the direction of the rolling tuned mass damping system are changed along with the vibration of the wind power tower at any time.
The tuned liquid damping system of the embodiment can adjust the frequency according to the depth of the viscous liquid 3, the size of the outer shell 1 and the size of the inner shell 2, and the rolling tuned mass damping system can adjust the frequency by adjusting the curvature of the spherical curved surface at the bottom of the inner shell 2 and the radius of the particle balls 4 and adjust the number, the roughness and the friction coefficient of the particle balls 4 according to engineering requirements.
Example 5:
the embodiment discloses a composite liquid-particle tuned damping device for damping wind power structures, which comprises an outer shell 1, an inner shell 2, viscous liquid 3, particle balls 4 and a sealing plate 5.
Referring to fig. 1 or 5, the housing 1 is a vertically arranged cylindrical structure, the interior of the housing 1 is hollow, the upper end of the housing 1 is closed, and the lower end of the housing is open. The closing plate 5 is connected with the lower end opening of the shell 1 in a sealing way.
In shell 1 was installed to inner shell 2, inner shell 2 was the cylinder structure of vertical setting, and the inside cavity of inner shell 2, the upper end of inner shell 2 is uncovered, and the lower extreme is sealed, and the bottom of inner shell 2 is the spherical curved surface of undercut. The hollow part of the inner shell 2 is marked as an inner cavity S, and a plurality of granular balls 4 are arranged in the inner cavity S.
Referring to fig. 1 or 5, the inner case 2 is connected to the top plate of the outer case 1 at its upper end, and has a gap with the closing plate 5 at its lower end. An outer cavity H is formed between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, viscous liquid 3 is filled in the outer cavity H, the lower end of the inner shell 2 is soaked in the viscous liquid 3, and a gap is formed between the liquid level of the viscous liquid 3 and the top plate of the outer shell 1.
Referring to fig. 5, a plurality of connection rings 6 are connected to the upper surface of the housing 1, and each connection ring 6 is connected to a wire rope 7.
Referring to fig. 8, the damping device disclosed in this embodiment is mounted on a land-based wind tower in a suspended manner, the wind tower includes a tower 8 and a nacelle 9, the lower end of the tower 8 is fixed on the land, the upper end of the tower is provided with the nacelle 9, and one end of the nacelle 9 is provided with a wind blade. A plurality of inner platforms 801 are arranged in the tower tube 8, and the inner platforms 801 are arranged at equal intervals along the height direction of the tower tube 8. The lower surface of each inner platform 801 is provided with one or a plurality of damping devices, and the number of the damping devices of each inner platform 801 is determined by actual engineering requirements. When each inner platform 801 is provided with a plurality of damping devices, the plurality of damping devices are annularly arranged around the midpoint of the inner platform 801, and the intervals between the plurality of damping devices are equal.
Referring to fig. 8, the upper ends of a plurality of the wire ropes 7 are connected to the lower surface of the inner platform 801.
Once the wind power tower vibrates, the viscous liquid 3 can generate a reverse inertia effect to generate head loss, the viscous liquid 3 interacts with the outer shell 1, the viscous liquid 3 interacts with the inner shell 2, accordingly, energy of the wind power tower is consumed, a tuned liquid damping system is formed to play a role, the inner shell 2 submerged in the viscous liquid 3 compresses a movement space of the viscous liquid 3, damping of the tuned liquid damping system is improved, and control capacity is enhanced. Meanwhile, the particle balls 4 in the inner shell 2 are subjected to energy dissipation and vibration reduction through rolling, friction and collision to form a rolling type tuned mass damping system to play a role. When the wind power tower vibrates, the tuned liquid damping system and the rolling tuned mass damping system are not limited in direction, and the direction of the tuned liquid damping system and the direction of the rolling tuned mass damping system are changed along with the vibration of the wind power tower at any time.
The tuned liquid damping system of the embodiment can adjust the frequency according to the depth of the viscous liquid 3, the size of the outer shell 1 and the size of the inner shell 2, and the rolling tuned mass damping system can adjust the frequency by adjusting the curvature of the spherical curved surface at the bottom of the inner shell 2 and the radius of the particle balls 4 and adjust the number, the roughness and the friction coefficient of the particle balls 4 according to engineering requirements.
Example 6:
the embodiment discloses a composite liquid-particle tuned damping device for damping wind power structures, which comprises an outer shell 1, an inner shell 2, viscous liquid 3, particle balls 4 and a sealing plate 5.
Referring to fig. 1, the housing 1 is a vertically arranged cylindrical structure, the interior of the housing 1 is hollow, the upper end of the housing 1 is closed, and the lower end of the housing is open. The closing plate 5 is connected with the lower end opening of the shell 1 in a sealing way.
In shell 1 was installed to inner shell 2, inner shell 2 was the cylinder structure of vertical setting, and the inside cavity of inner shell 2, the upper end of inner shell 2 is uncovered, and the lower extreme is sealed, and the bottom of inner shell 2 is the spherical curved surface of undercut. The hollow part of the inner shell 2 is marked as an inner cavity S, and a plurality of granular balls 4 are arranged in the inner cavity S.
Referring to fig. 1, the inner case 2 is connected to the top plate of the outer case 1 at its upper end, and has a gap with the closing plate 5 at its lower end. An outer cavity H is formed between the outer wall of the inner shell 2 and the inner wall of the outer shell 1, viscous liquid 3 is filled in the outer cavity H, the lower end of the inner shell 2 is soaked in the viscous liquid 3, and a gap is formed between the liquid level of the viscous liquid 3 and the top plate of the outer shell 1.
Referring to fig. 9, the damping device disclosed in this embodiment is installed on an offshore wind tower in a floor type, where the wind tower includes a tower 8 and a nacelle 9, a lower end of the tower 8 is fixed below the sea surface, an upper end of the tower is provided with the nacelle 9, and one end of the nacelle 9 is provided with a wind blade. A plurality of inner platforms 801 are arranged in the tower tube 8, and the inner platforms 801 are arranged at equal intervals along the height direction of the tower tube 8. One or a plurality of damping devices are arranged on the upper surface of each inner platform 801, and the number of the damping devices on each inner platform 801 is determined by actual engineering requirements. Referring to fig. 3, when a plurality of damping devices are disposed on each of the inner platforms 801, the plurality of damping devices are annularly arranged around a midpoint of the inner platform 801, and the plurality of damping devices are equally spaced.
Once the tower barrel 8 vibrates, the viscous liquid 3 can generate a reverse inertia effect to generate head loss, the viscous liquid 3 interacts with the outer shell 1, the viscous liquid 3 interacts with the inner shell 2, accordingly, energy of the tower barrel 8 is consumed, a tuned liquid damping system is formed to play a role, the inner shell 2 submerged in the viscous liquid 3 compresses a movement space of the viscous liquid 3, damping of the tuned liquid damping system is improved, and control capacity is enhanced. Meanwhile, the particle balls 4 in the inner shell 2 are subjected to energy dissipation and vibration reduction through rolling, friction and collision to form a rolling type tuned mass damping system to play a role. When the tower drum 8 vibrates, the tuned liquid damping system and the rolling tuned mass damping system are not limited in direction, and the direction of the tuned liquid damping system and the direction of the rolling tuned mass damping system are changed along with the vibration of the tower drum 8 at any time.
The tuned liquid damping system of the embodiment can adjust the frequency according to the depth of the viscous liquid 3, the size of the outer shell 1 and the size of the inner shell 2, and the rolling tuned mass damping system can adjust the frequency by adjusting the curvature of the spherical curved surface at the bottom of the inner shell 2 and the radius of the particle balls 4 and adjust the number, the roughness and the friction coefficient of the particle balls 4 according to engineering requirements.

Claims (2)

1. A composite liquid-particle tuned damping device for vibration reduction of a wind power structure is characterized in that: comprises an outer shell (1), an inner shell (2), viscous liquid (3), particle balls (4) and a sealing plate (5);
the shell (1) is of a vertically arranged cylindrical structure, the interior of the shell (1) is hollow, the upper end of the shell (1) is closed, and the lower end of the shell is open; the sealing plate (5) is hermetically connected with an opening at the lower end of the shell (1);
the inner shell (2) is arranged in the outer shell (1), the inner shell (2) is of a vertically arranged cylindrical structure, the inner part of the inner shell (2) is hollow, the upper end of the inner shell (2) is open, and the lower end of the inner shell is closed; the hollow part of the inner shell (2) is marked as an inner cavity S, and a plurality of granular balls (4) are arranged in the inner cavity S;
the upper end of the inner shell (2) is connected to the top plate of the outer shell (1), and a gap is formed between the lower end of the inner shell and the sealing plate (5); an outer cavity H is formed between the outer wall of the inner shell (2) and the inner wall of the outer shell (1), viscous liquid (3) is injected into the outer cavity H, the lower end of the inner shell (2) is soaked in the viscous liquid (3), and a gap is formed between the liquid level of the viscous liquid (3) and the top plate of the outer shell (1).
2. The composite liquid-particle tuned damping device for wind power structure vibration damping according to claim 1, wherein: the bottom of the inner shell (2) is a spherical curved surface which is concave downwards.
CN202010299536.3A 2020-04-16 2020-04-16 Composite liquid-particle tuned damping device for vibration reduction of wind power structure Pending CN111549925A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040221520A1 (en) * 2003-05-05 2004-11-11 Te-Chuan Chiang All-directional damping and earthquake-resisting unit
CN103114658A (en) * 2013-02-05 2013-05-22 北京工业大学 Ball-shaped cabin tuning type particle camper
CN105443634A (en) * 2016-01-20 2016-03-30 上海风畅土木工程技术有限公司 Basin type particle shock absorber with dual functions of tuning and collision
CN105863097A (en) * 2016-05-11 2016-08-17 同济大学 Nonlinear rail type collaborative tuning damper
CN108442552A (en) * 2018-04-24 2018-08-24 同济大学 The non-linear hybrid energy dissipation re-centring damper of three-dimensional

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040221520A1 (en) * 2003-05-05 2004-11-11 Te-Chuan Chiang All-directional damping and earthquake-resisting unit
CN103114658A (en) * 2013-02-05 2013-05-22 北京工业大学 Ball-shaped cabin tuning type particle camper
CN105443634A (en) * 2016-01-20 2016-03-30 上海风畅土木工程技术有限公司 Basin type particle shock absorber with dual functions of tuning and collision
CN105863097A (en) * 2016-05-11 2016-08-17 同济大学 Nonlinear rail type collaborative tuning damper
CN108442552A (en) * 2018-04-24 2018-08-24 同济大学 The non-linear hybrid energy dissipation re-centring damper of three-dimensional

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