CN109138207B - Energy recovery type eddy current damper - Google Patents
Energy recovery type eddy current damper Download PDFInfo
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- CN109138207B CN109138207B CN201811148743.8A CN201811148743A CN109138207B CN 109138207 B CN109138207 B CN 109138207B CN 201811148743 A CN201811148743 A CN 201811148743A CN 109138207 B CN109138207 B CN 109138207B
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- eddy current
- energy recovery
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
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- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
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- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an energy recovery type eddy current damper which comprises an outer barrel, wherein a ball screw pair, a groove and a mass block are arranged in the outer barrel. The ball screw pair comprises a screw rod, a nut and a plurality of balls. And a circulating channel is formed between the screw rod part and the nut, and balls are arranged in the circulating channel. The periphery of the nut is fixedly provided with a plurality of steel plates, and the lower parts of the steel plates are provided with damping cavities fixed on the bottom plate of the outer cylinder. The damping chamber inside be equipped with magnet, the magnetic pole staggered arrangement of magnet and leave the clearance that is used for passing through the steel sheet between adjacent magnet, the winding has the circular telegram coil on the magnet. One end of the screw rod is fixed with a rigid rod, and the other end of the rigid rod is fixed on the outer wall of the groove. The groove is internally provided with a mass block, a guide rod is arranged in the direction vertical to the arrangement direction of the screw rod, the guide rod penetrates through a through hole in the middle of the mass block, and two ends of the guide rod are fixed on the inner wall of the groove. The groove is internally provided with a spring, and two ends of the spring are respectively fixed on the inner wall of the groove and the mass block.
Description
Technical Field
The invention belongs to the field of vibration control of civil engineering, and particularly relates to an energy recovery type eddy current damper which is mainly applied to controlling vibration response of high-rise buildings and high-rise structures.
Technical Field
The traditional structural strength design method resists external force by enhancing the self resistance of the structure. With the continuous progress of scientific technology, the capability of human beings for resisting various natural disasters is continuously improved, and in recent years, the vibration control technology is a new research hotspot in the field of building structure earthquake resistance, and the vibration resistance of the structure is enhanced by adopting a structure vibration control theory and method.
Structural vibration control techniques can be divided into, depending on whether the control measures taken require external energy: passive control, active control, and semi-active control. Common passive control methods include a shock isolation technology, a shock absorption technology and an energy consumption technology. The passive control has the advantages of no need of external energy, simple structure and the like, has good vibration reduction effect and is widely applied to engineering. But it cannot make corresponding adjustment according to the change situation of the vibration and has poor adaptability. The active control mode mainly comprises an active tuning quality control system, an active anchor cable control system, an aerodynamic accessory system and the like. The purpose of intelligently controlling the structure vibration is achieved by calculating certain influence exerted on a control target by the driving actuator in real time. However, the active control manufacturing technology is complex, the manufacturing cost is high, and the application range is relatively small.
The semi-active control can realize the control effect similar to the active control only by inputting a small amount of energy, and has relatively simple structure and economic manufacturing cost, thereby having wide application prospect. The eddy current damper cuts magnetic induction lines when a conductor is in a changing magnetic field by utilizing the electromagnetic induction principle, so that magnetic flux can be changed, damping force for preventing the conductor from moving relative to the magnetic field by eddy current is generated, and finally energy of structural vibration is dissipated by heat. The eddy current damper does not change the dynamic characteristic of the controlled structure, and meanwhile, the sealing problem of liquid media in a viscous damper or a magnetorheological damper does not need to be considered. In the past, aiming at the eddy current damper, in order to greatly increase the damping force provided by the damper, the aim of semi-actively and intelligently controlling the structural vibration can be achieved by increasing the magnetic field intensity through a winding coil. However, this method requires an external power supply, which greatly increases the difficulty in designing and constructing the damper.
Disclosure of Invention
The invention aims to provide an energy recovery type eddy current damper, which aims to reduce the horizontal vibration response of a high-rise building or a high-rise structure under the action of wind load and earthquake and achieve the purposes of energy consumption and vibration reduction.
In order to achieve the purpose, the invention adopts the following technical scheme:
an energy recovery type eddy current damper comprises an outer cylinder, wherein a ball screw pair, an inner cylinder I and an inner cylinder II are arranged in the outer cylinder;
one end of the ball screw pair is connected with the inner cylinder I, and the other end of the ball screw pair is suspended in the air; a plurality of steel plates are arranged on the outer ring of the nut of the screw-nut pair; the two ends of the nut are fixedly connected with a power generation module, and the power generation module consists of a rotor and a stator; the rotor consists of a permanent magnet and a rotor magnetic yoke; the periphery of the rotor is provided with a stator core, a stator winding is arranged on the stator core, a stator shell is fixedly connected to the outside of the stator core, and a plane bearing is arranged at the end faces of the rotor and the stator shell, so that the axial displacement cannot occur when the nut drives the rotor to rotate; the stator shell is provided with a lead outlet, the lead extends out of the lead outlet and is externally connected with a rectifier fixed on the outer wall of the inner cylinder II, and the rectifier is connected with a storage battery additionally arranged outside; the storage battery, the acceleration sensor, the controller and the electrified coil form a series control circuit; the acceleration sensor is fixed on the controlled structure.
The inner cylinder II is hollow to form a damping cavity, is positioned below the steel plate and is fixed on the bottom plate of the outer cylinder to be connected with the stator shell; the damping chamber inside be equipped with magnet, the magnetic pole staggered arrangement of magnet and leave the clearance that is used for passing through the steel sheet between adjacent magnet, the winding has the circular telegram coil on the magnet
A mass block and a guide rod are arranged in the inner cylinder I, the guide rod is horizontally arranged and is vertical to the axis of the screw rod, the guide rod penetrates through a through hole in the middle of the mass block, and two ends of the guide rod are fixed on the inner wall of the inner cylinder I; two ends of the mass block are connected with the inner cylinder I through springs.
The further technical scheme is as follows: the outer cylinder is made of stainless steel insulating materials, and plays a role in protecting internal devices in an open-air environment.
The further technical scheme is as follows: the steel plate is a conductor, and the material can be copper or aluminum. The spring is made of intelligent shape memory alloy.
The further technical scheme is as follows: the bottom of the mass block is provided with an orientation wheel, so that the mass block can freely move along the guide rod in the horizontal direction perpendicular to the axis of the screw rod. The bottom of the inner cylinder I is also provided with a directional wheel, so that the mass block and the inner cylinder I can move along the axial direction of the screw rod.
The further technical scheme is as follows: the steel plate is provided with a plurality of circles, and each circle is uniformly provided with a plurality of circles.
The working principle of the invention is as follows:
the horizontal axis direction of the outer cylinder can be divided into an X direction and a Y direction; defining the direction of the axis of the ball screw as the X direction; the direction vertical to the axis of the ball screw is the Y direction; the damper is fixed to the top of a high-rise building or a high-rise structure. Under the action of earthquake or wind load, the main structure vibrates. When the main structure vibrates in the X direction of the axis, the mass block drives the guide rod and the inner cylinder I to move in the horizontal X direction simultaneously due to inertia, and the inner cylinder I moves to pull the screw rod to move in the horizontal X direction through the rigid rod. The nut and the rotor rotate due to the constraint of the stator housing fixed on the inner wall of the damping chamber. The steel plate fixed on the periphery of the nut rotates in the gap of the magnet, the steel plate continuously cuts magnetic induction lines to cause the change of magnetic flux in the steel plate, eddy current is generated to inhibit the rotation speed of the nut and slow down the axial movement of the screw rod, and the purpose of controlling the structural vibration is finally achieved. Meanwhile, the rotor and the stator form an inner rotor direct-drive generator structure, when the rotor rotates, the stator winding cuts the magnetic induction line to generate electricity to generate current, and the current is rectified by the rectifier fixed on the outer wall of the inner cylinder II to store electric energy in the storage battery. The acceleration sensor receives vibration signals of the main structure and transmits the vibration signals to the controller, and the controller controls the current in the electrified coil according to the vibration acceleration of the structure, so that the magnetic field intensity is increased in real time, the output damping force is improved, and the horizontal vibration of the main structure is further inhibited.
When the main structure vibrates in the direction of the axis Y, the mass block moves in the inner cylinder I along the guide rod due to inertia. The mass block moves to cause the spring to stretch or compress, and the spring provides a damping force opposite to the movement direction for the mass block, so that the aim of controlling the vibration of the main body structure is fulfilled. After the vibration is finished, the vibration damping device after working is restored to the original state due to the good deformation restorability of the shape memory alloy, and the working performance of the vibration damping device in the next application is prevented from being influenced.
The invention has the beneficial effects that:
(1) the invention utilizes the ball screw pair to convert the horizontal vibration of the main structure into the high-speed rotation of the vibration damping component, and has higher linkage efficiency compared with the traditional transmission machinery. When vibration occurs, the steel plate and the magnets on the two sides rotate relatively, eddy current is generated in the steel plate, and the working efficiency of the vibration damping device is improved.
(2) The invention utilizes the electromagnetic induction principle, the movement of the conductor in the magnetic field leads to the change of magnetic flux, and the generated electric eddy current is finally dissipated in the form of heat. The magnetizing direction of the coil sleeved outside the magnet is the same as the magnetic field direction of the magnet, so that the magnetic field intensity can be adjusted in real time according to the intensity of vibration. Meanwhile, when no power is supplied, the damper can work normally.
(3) The invention drives the rotor and the stator to rotate relatively through the rotation of the nut, and the generated electric quantity is stored in the storage battery after being rectified. The current is output to the electrified coil according to the structural vibration, the magnetic field intensity is increased, so that the damper provides larger damping force, and the energy recovery is realized on the basis of not influencing the original vibration reduction performance of the damper.
(4) The invention adopts the shape memory alloy of intelligent material, utilizes the obvious superelasticity effect thereof to provide the required damping force when the main body structure vibrates, and restores the vibration damper to the original shape after the vibration is finished, thereby avoiding influencing the working performance when the vibration damper is applied next time.
(5) The invention utilizes the self-powered intelligent control technology to lead the vibration control effect to be similar to the active control effect, and compared with the active control, the invention has the advantages of simple structure, economic manufacturing cost and the like, and has good economic benefit and social benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a top view of an energy recovery eddy current damper;
FIG. 2 is a front view of an energy recovery eddy current damper;
FIG. 3 is a cross-sectional view A-A of an energy recovery eddy current damper;
FIG. 4 is a cross-sectional view B-B of an energy recovery eddy current damper;
FIG. 5 is a cross-sectional view of an energy recovery eddy current damper taken along line C-C;
FIG. 6 is a diagram of a damper chamber configuration of an energy recovery eddy current damper;
FIG. 7 is a schematic diagram of a control circuit of an energy recovery type eddy current damper
In the figure, 1 outer cylinder, 2 inner cylinders I, 3 mass blocks, 4 guide rods, 5 springs, 6 lead screws, 7 nuts, 8 balls, 9 steel plates, 10 plane bearings, 11 rigid rods, 12 permanent magnets, 13 stator windings, 14 stator shells, 15 orientation wheels I, 16 orientation wheels II, 17 rotor yokes, 18 stator cores, 19 inner cylinders II, 20 magnets, 21 rectifiers, 22 power generation modules, 23 storage batteries, 24 acceleration sensors, 25 controllers and 26 energized coils.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
As described in the background art, the semi-active control in the prior art can realize the control effect similar to the active control only by inputting a small amount of energy, and has relatively simple structure and economic manufacturing cost, thereby having wide application prospect. The eddy current damper cuts magnetic induction lines when a conductor is in a changing magnetic field by utilizing the electromagnetic induction principle, so that magnetic flux can be changed, damping force for preventing the conductor from moving relative to the magnetic field by eddy current is generated, and finally energy of structural vibration is dissipated by heat. The eddy current damper does not change the dynamic characteristic of the controlled structure, and meanwhile, the sealing problem of liquid media in a viscous damper or a magnetorheological damper does not need to be considered. In the past, aiming at the eddy current damper, in order to greatly increase the damping force provided by the damper, the aim of semi-actively and intelligently controlling the structural vibration can be achieved by increasing the magnetic field intensity through a winding coil. However, this method requires an external power supply, which greatly increases the difficulty in designing and constructing the damper.
In a typical embodiment of the present application, as shown in fig. 1, an energy recovery type eddy current damper includes an outer cylinder 1, a ball screw pair, an inner cylinder I2, and an inner cylinder II 19. The ball screw pair comprises a screw 6, a nut 7 and a plurality of balls 8. Between the part of the screw 6 and the nut 7 a circulation channel is formed, in which balls 8 are arranged. The periphery of nut 7 is equipped with steel sheet 9, and the steel sheet 9 lower part is equipped with the inner tube II 19 of fixing on urceolus 1 bottom plate, and the inside cavity of inner tube II 19 forms the damping chamber, and the inside magnet 20 that is equipped with of damping chamber, magnet 20's magnetic pole staggered arrangement just face and leave the clearance through steel sheet 9 between two magnet 20 mutually, and the winding has the circular telegram coil on the magnet 20. One end of the screw rod 6 is provided with a rigid rod 11, and the other end face of the rigid rod 11 is fixedly connected to the side wall of the inner cylinder I2; the other end of the screw rod 6 is suspended.
As shown in fig. 1, the direction parallel to the axis of the screw 6 is defined as a horizontal X direction, and the direction perpendicular to the axis of the screw 6 is defined as a horizontal Y direction. The mass block 3 is placed in the inner cylinder I2, the through hole penetrates through the mass block 3 along the horizontal Y direction, the guide rod 4 is arranged in the through hole, and two ends of the guide rod 4 are fixed on the inner wall of the inner cylinder I2. A spring 5 is arranged in the inner cylinder I2 along the horizontal Y direction, and two ends of the spring 5 are respectively fixed on the mass block 3 and the inner wall of the inner cylinder I2. The bottom of the mass block 3 is provided with a directional wheel I15, so that the mass block 3 can horizontally move in the inner cylinder I2 along the guide rod 4. The bottom of the inner cylinder I2 is also provided with an orientation wheel II 16, so that the inner cylinder I2 and the internal structure can move in the horizontal X direction.
And the two ends of the nut 7 are fixedly connected with a power generation module 22, and the power generation module 22 consists of a rotor and a stator. The rotor consists of permanent magnets 12 and a rotor yoke 17. The periphery of the rotor is provided with a stator core 18, the stator core 18 is provided with a stator winding 13, the outside of the stator core 18 is fixedly connected with a stator shell 14, and the end faces of the rotor and the stator shell 14 are provided with a plane bearing 10, so that the nut 7 can drive the rotor to rotate without axial displacement. The stator shell 14 is fixed with the outer wall of the inner cylinder II 19. And a lead outlet is formed in the stator shell 14, the lead extends out of the lead outlet and is externally connected with a rectifier 21 fixed on the outer wall of the inner cylinder II 19, and the rectifier 21 is connected with a storage battery 23 additionally arranged outside. The battery 23, the acceleration sensor 24, the controller 25 and the electrified coil 26 form a series control circuit. The acceleration sensor 24 is fixed to the controlled structure.
The outer cylinder is made of stainless steel insulating materials, and plays a role in protecting internal devices in an open-air environment.
The steel plate is a conductor, and the material can be copper or aluminum. The spring is made of intelligent shape memory alloy.
The bottom of the mass block is provided with an orientation wheel, so that the mass block can freely move along the guide rod in the horizontal direction perpendicular to the axis of the screw rod. The bottom of the inner cylinder I is also provided with a directional wheel, so that the mass block and the inner cylinder I can move along the axial direction of the screw rod.
The damper is fixed to the top of a high-rise building or a high-rise structure. Under the action of earthquake or wind load, the main structure vibrates. When the main structure vibrates in the direction of the axis X, the mass block 3 drives the guide rod 4 and the inner cylinder I2 to move in the horizontal X direction simultaneously due to inertia, and the inner cylinder I2 moves to pull the screw rod 6 to move in the horizontal X direction through the rigid rod 11. The nut 7 and the rotor rotate due to the constraint of the stator housing 14 fixed to the inner wall of the damping chamber. The steel plate 9 fixed on the periphery of the nut 7 rotates in the gap of the magnet 20, the steel plate 9 continuously cuts magnetic induction lines to cause the change of magnetic flux in the steel plate 9, an electric eddy current is generated to inhibit the rotation speed of the nut 7 and slow down the axial movement of the screw rod 6, and the purpose of controlling the structural vibration is finally achieved. Meanwhile, the rotor and the stator form an inner rotor direct-drive generator structure, when the rotor rotates, the stator winding 13 cuts the magnetic induction line to generate current, and the current is rectified by a rectifier fixed on the outer wall of the inner cylinder II to store electric energy in the storage battery. The acceleration sensor receives vibration signals of the main structure and transmits the vibration signals to the controller, and the controller controls the current in the electrified coil according to the vibration acceleration of the structure, so that the magnetic field intensity is increased in real time, the output damping force is improved, and the horizontal vibration of the main structure is further inhibited.
When the main structure vibrates in the direction of the axis Y, the mass 3 moves along the guide rods 4 in the inner cylinder I2 due to inertia. The movement of the mass 3 causes the spring 5 to be stretched or compressed, and the spring 5 provides a damping force opposite to the movement direction to the mass 4, thereby achieving the purpose of controlling the vibration of the main structure. After the vibration is finished, the vibration damping device after working is restored to the original state due to the good deformation restorability of the shape memory alloy, and the working performance of the vibration damping device in the next application is prevented from being influenced.
The damper converts horizontal vibration of a main body structure into high-speed rotation of a vibration damping component by utilizing the ball screw pair, and has higher linkage efficiency compared with the traditional transmission machinery. And by utilizing the electromagnetic induction principle, when vibration occurs, the steel plate and the magnets on the two sides rotate relatively, the steel plate moves in a magnetic field to cause the change of magnetic flux, and eddy current is generated and finally dissipated in the form of heat. The magnetizing direction of the coil sleeved outside the magnet is the same as the magnetic field direction of the magnet, so that the magnetic field intensity can be adjusted in real time according to the intensity of vibration. Meanwhile, when no power is supplied, the damper can work normally.
The damper utilizes an inner rotor direct-drive generator structure consisting of a rotor and a stator, and generated electric quantity is stored in a storage battery after being rectified. The current is output to the electrified coil according to the structural vibration, the magnetic field intensity is increased, so that the damper provides larger damping force, and the energy recovery is realized on the basis of not influencing the original vibration reduction performance of the damper.
The invention utilizes the self-powered intelligent control technology to lead the vibration control effect to be similar to the active control effect, and compared with the active control, the invention has the advantages of simple structure, economic manufacturing cost and the like, and has good economic benefit and social benefit.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (6)
1. An energy recovery type eddy current damper is characterized by comprising an outer cylinder, wherein a ball screw pair, an inner cylinder I and an inner cylinder II are arranged in the outer cylinder;
one end of the ball screw pair is connected with the inner cylinder I, and the other end of the ball screw pair is suspended in the air; a plurality of steel plates are arranged on the outer ring of the nut of the screw-nut pair; the two ends of the nut are fixedly provided with power generation modules, and each power generation module consists of a rotor and a stator; the rotor consists of a permanent magnet and a rotor magnetic yoke; the periphery of the rotor is provided with a stator core, a stator winding is arranged on the stator core, a stator shell is fixedly connected to the outside of the stator core, and a plane bearing is arranged at the end faces of the rotor and the stator shell, so that the axial displacement cannot occur when the nut drives the rotor to rotate; the stator shell is provided with a lead outlet, the lead extends out of the lead outlet and is externally connected with a rectifier fixed on the outer wall of the inner cylinder II, and the rectifier is connected with a storage battery additionally arranged outside; the storage battery, the acceleration sensor, the controller and the electrified coil form a series control circuit; the acceleration sensor is fixed on the controlled structure;
the inner cylinder II is hollow to form a damping cavity, is positioned below the steel plate and is fixed on the bottom plate of the outer cylinder to be connected with the stator shell; magnets are arranged in the damping cavity, magnetic poles of the magnets are arranged in a staggered mode, gaps for steel plates to pass through are reserved between adjacent magnets, and electrified coils are wound on the magnets;
a mass block and a guide rod are arranged in the inner cylinder I, the guide rod is horizontally arranged and is vertical to the axis of the screw rod, the guide rod penetrates through a through hole in the middle of the mass block, and two ends of the guide rod are fixed on the inner wall of the inner cylinder I; two ends of the mass block are connected with the inner cylinder I through springs.
2. An energy recovery type eddy current damper as claimed in claim 1, wherein said outer cylinder is made of stainless steel insulating material to protect the internal devices in the open air environment.
3. An energy recovery type eddy current damper as claimed in claim 1, wherein the steel plate is a conductor and the material is copper or aluminum; the spring is made of intelligent shape memory alloy.
4. An energy recovery type eddy current damper as claimed in claim 1, wherein the bottom of the mass is provided with a directional wheel so that the mass can freely move in a horizontal direction perpendicular to the axis of the screw shaft along the guide bar; the bottom of the inner cylinder I is also provided with a directional wheel, so that the mass block and the inner cylinder I can move along the axial direction of the screw rod.
5. An energy recovery type eddy current damper as claimed in claim 1, wherein the steel plate is provided with a plurality of turns, a plurality of which are uniformly provided per turn.
6. An energy recovery eddy current damper as recited in claim 1, wherein N-pole and S-pole of said magnet are located in vertical direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811148743.8A CN109138207B (en) | 2018-09-29 | 2018-09-29 | Energy recovery type eddy current damper |
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| CN201811148743.8A CN109138207B (en) | 2018-09-29 | 2018-09-29 | Energy recovery type eddy current damper |
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| CN109138207A CN109138207A (en) | 2019-01-04 |
| CN109138207B true CN109138207B (en) | 2020-01-21 |
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| CN110984418B (en) * | 2020-01-13 | 2021-04-16 | 东南大学 | Adjustable ultra-low frequency vertical eddy current tuned mass damper |
| CN111719725A (en) * | 2020-05-18 | 2020-09-29 | 长江大学 | Building vibration suppression and energy recovery device based on electromagnetic damping |
| CN111827514A (en) * | 2020-07-27 | 2020-10-27 | 湖南大学 | Eddy current damping wall and building |
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| CN203743282U (en) * | 2014-03-21 | 2014-07-30 | 湖南大学 | Axial eddy-current retarder based on screw drive mode |
| CN104179877B (en) * | 2014-08-26 | 2016-02-24 | 合肥工业大学 | Pure shear cut MR damper |
| CN106402228A (en) * | 2016-11-30 | 2017-02-15 | 浙江建科减震科技有限公司 | Electromagnetic eddy rotating damper |
| CN106758772A (en) * | 2016-12-16 | 2017-05-31 | 同济大学 | A kind of acceleration type current vortex inertia sinker |
| CN106836543A (en) * | 2017-03-03 | 2017-06-13 | 哈尔滨工业大学 | The adjustable passive negative stiffness damper of series mechanism |
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