WO2020177045A1 - 一种轴向位移放大型电涡流阻尼器 - Google Patents

一种轴向位移放大型电涡流阻尼器 Download PDF

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Publication number
WO2020177045A1
WO2020177045A1 PCT/CN2019/076811 CN2019076811W WO2020177045A1 WO 2020177045 A1 WO2020177045 A1 WO 2020177045A1 CN 2019076811 W CN2019076811 W CN 2019076811W WO 2020177045 A1 WO2020177045 A1 WO 2020177045A1
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WIPO (PCT)
Prior art keywords
gear
ball
eddy current
axial displacement
sliding rod
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Ceased
Application number
PCT/CN2019/076811
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English (en)
French (fr)
Inventor
付兴
李宏男
杜文龙
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Dalian University of Technology
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Dalian University of Technology
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Publication date
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Priority to PCT/CN2019/076811 priority Critical patent/WO2020177045A1/zh
Priority to US17/047,592 priority patent/US11796031B2/en
Publication of WO2020177045A1 publication Critical patent/WO2020177045A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
    • H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
    • H02K49/046—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with an axial airgap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
    • F16F15/035—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means by use of eddy or induced-current damping
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2222/00—Special physical effects, e.g. nature of damping effects
    • F16F2222/06—Magnetic or electromagnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/0005—Attachment, e.g. to facilitate mounting onto confer adjustability
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/0052—Physically guiding or influencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/10—Enclosure elements, e.g. for protection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2232/00—Nature of movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2232/00—Nature of movement
    • F16F2232/08—Linear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/20—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members
    • F16H1/22—Toothed gearings for conveying rotary motion without gears having orbital motion involving more than two intermeshing members with a plurality of driving or driven shafts; with arrangements for dividing torque between two or more intermediate shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/041—Coatings or solid lubricants, e.g. anti-seize layers or pastes

Definitions

  • the invention belongs to the technical field of structural vibration control, and specifically refers to an axial displacement amplification type eddy current damper.
  • Axial displacement damper is a device that reduces damage to buildings by absorbing the energy of earthquake, wind, mechanical vibration and other forms of vibration. It is widely used in civil buildings, industrial buildings, bridges and other buildings. When the building is suddenly impacted by external vibration, the axial displacement damper will consume the impact energy of the external force on the building, reduce the vibration amplitude of the building, and greatly reduce the impact and damage of the external vibration to the building.
  • the existing axial displacement dampers have many shortcomings. For example, when the vibration is small, the energy consumption is low, and the ability to consume vibration and impact energy is poor. These shortcomings greatly affect the safety of buildings and people's lives and properties. Safety.
  • the present invention combines an axial displacement damper with an eddy current damper, and proposes an axial displacement amplified eddy current damper.
  • the purpose of the present invention is to design a damper with reasonable structure and obvious vibration reduction effect.
  • An axial displacement amplified eddy current damper which is mainly composed of an elliptical hollow body 1, a cover plate 2, a bolt 3, a sliding rod 4, a gear a5, a gear b6, a gear c7, a copper sheet 8, a permanent magnet 9, a ball a10, Ball b11, ball c12, partition 13, hinge 14 and U-shaped rod 15;
  • the elliptical hollow body 1 and the cover plate 2 are connected by bolts 3, and the two constitute the housing of the entire damping device;
  • the sliding rod 4 is a rod structure with a hollow inside.
  • the outer surface of the sliding rod 4 passes through the housing and slides axially through the ball a10 inside the housing;
  • the inner surface of the sliding rod 4 is divided into an upper inner surface and a lower inner surface, and the upper inner surface is processed Toothed and meshed with gear a5;
  • the lower inner surface is machined with a "convex" shaped area, the ball b11 is located at the protruding position of the "convex" shaped area, and the ball b11 is located near the gear a5;
  • the gear a5 has teeth on both sides of the gear a5, the middle part is not toothed, the teeth on both sides are meshed with the teeth on the slide bar 4, and the middle part of the toothless part is in close contact with the ball b11;
  • the gear b6 and the gear a5 are fixed together to rotate at the same time, and their rotation shafts pass through the partition 13;
  • the gear c7 is engaged with the gear b6, and is rotated by the ball c12 on the partition 13, the part of the gear c7 between the two partitions 13 has teeth, and the remaining part is a smooth cylinder without teeth;
  • the copper sheet 8 is fixed to the end of the gear c7 and rotates with the rotation of the gear c7;
  • the permanent magnets 9 are located on both sides of the copper sheet 8;
  • the hinge 14 is located at the end of the whole device and can rotate freely.
  • the radius of the gear b6 is larger than the radius of the gear c7.
  • the whole device is made of magnetically conductive material, and the ball a10, the ball b11 and the ball c12 are spherical steel balls.
  • the stroke of the sliding rod is controlled by the U-shaped rod and the device housing.
  • the deformation of the building will cause the dampers to elongate or shorten.
  • the sliding of the sliding rod will cause the gear to rotate, which in turn causes the copper sheet to rotate between the permanent magnets.
  • the copper sheet receives a force that inhibits its movement. This is because the relative movement of the copper sheet and the magnetic field causes the copper sheet to generate a dynamic electromotive force, and the movement of the electric charge forms an eddy current.
  • These eddy currents are subjected to the Lorentz force under the action of the magnetic field, and the direction is always opposite to the direction of movement of the copper sheet, thus forming resistance, that is, the eddy current damping force.
  • the axial displacement amplified eddy current damper of the present invention converts the axial movement of the sliding rod into the rotation of the copper sheet and generates an eddy current for energy consumption.
  • the rotation of the copper sheet is enlarged by adjusting the gear size. , A shorter sliding rod displacement can cause a larger angle of rotation of the copper sheet, and the energy consumption efficiency is greatly improved;
  • the axial displacement amplified eddy current damper of the present invention can adjust the damping parameters by adjusting the magnetic field strength of the permanent magnet, the thickness of the copper sheet, and the distance between the copper sheet and the permanent magnet;
  • the axial displacement amplified eddy current damper of the present invention uses permanent magnets to provide a continuous magnetic field source without external energy sources, and can produce long-term stable vibration reduction effects;
  • the axial displacement amplified eddy current damper of the present invention adopts magnetic materials, which can effectively avoid magnetic leakage of the magnetic circuit, which not only improves the efficiency of eddy current damping, but also avoids impact on surrounding elements.
  • the axial displacement amplified type eddy current damper of the present invention has reasonable design, simple structure and convenient installation.
  • Fig. 1 is an A-A sectional view of an axial displacement amplified eddy current damper according to an embodiment of the present invention
  • FIG. 2 is a B-B cross-sectional view of an axial displacement amplified eddy current damper according to an embodiment of the present invention
  • FIG. 3 is a C-C cross-sectional view of an axial displacement amplified eddy current damper according to an embodiment of the present invention
  • an embodiment of the axial displacement amplifying eddy current damper provided by the embodiment of the present invention includes an elliptical hollow body 1, a cover plate 2, a bolt 3, a sliding rod 4, a gear a 5, a gear b 6.
  • the elliptical hollow body 1 and the cover plate 2 are connected by bolts 3, and the two constitute the housing of the entire damping device;
  • the teeth on both sides are meshed with the teeth on the slide bar 4, and the toothless part in the middle is closely attached to the ball b 11, and the upper and lower sides of the gear a 5 are both
  • the force can prevent the unilateral force gear from disengaging and improve the transmission efficiency
  • the gear b 6 and the gear a 5 are fixed together to rotate at the same time, and their rotation shafts pass through the partition 13;
  • Gear c 7 meshes with gear b 6.
  • the part of gear c 7 between the two partitions 13 has teeth, and the remaining part is a toothless smooth cylinder.
  • the entire gear c 7 passes through the partition 13 and is connected to the copper sheet 8.
  • the ball c 12 on the partition 13 acts to reduce the rotational friction of the gear c 7.
  • the permanent magnets 9 are located on both sides of the copper sheet 8;
  • Hinge 14 is located at the end of the entire device, can rotate freely, and acts as a connection between the structure and the damper during use;
  • the present invention converts the axial movement of the sliding rod 3 into the rotation of the copper sheet 8 and generates eddy currents for energy consumption.
  • the rotation of the copper sheet 8 is enlarged by adjusting the gear size, and the shorter sliding rod 3 displacement can cause larger
  • the angled copper sheet 8 rotates, and the energy consumption efficiency is greatly improved; by adjusting the magnetic field strength of the permanent magnet 9, the thickness of the copper sheet 8, and the distance between the copper sheet 8 and the permanent magnet 9, the damping parameters can be adjusted; permanent magnet 9 is used
  • the influence of various components the invention has reasonable design, simple structure, convenient installation, and good application prospects.
  • the radius of gear b 6 is greater than the radius of gear c 7;
  • the whole device is made of magnetically permeable material, the balls are spherical steel balls, and all balls are coated with lubricating oil to reduce friction ;
  • the middle part of the slide bar 4 is processed into a "convex" shape, the gear a 5 has teeth on both sides, and the middle part has no teeth. The upper and lower sides are in contact with the slide bar 4, which can prevent the unilateral force gear from disengaging and improve the transmission efficiency ;
  • the stroke of the slide rod 4 is controlled by the U-shaped rod 15 and the device housing.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

一种轴向位移放大型电涡流阻尼器，由椭圆空心体(1)、盖板(2)、螺栓(3)、滑杆(4)、齿轮a(5)、齿轮b(6)、齿轮c(7)、铜片(8)、永磁体(9)、滚珠a(10)、滚珠b(11)、滚珠c(12)、隔板(13)、铰(14)和U型杆(15)组成。该阻尼器设计合理，构造简单，且安装方便。

Description

一种轴向位移放大型电涡流阻尼器 技术领域
本发明属于结构振动控制技术领域，具体是指一种轴向位移放大型电涡流阻尼器。
 背景技术
轴向位移阻尼器是一种通过吸收地震、风振、机械振动及其他形式振动的能量以减小建筑物破坏的装置，在民用建筑、工业建筑、桥梁等建筑物中被广泛使用。当建筑物受到外部振动的突然冲击时，轴向位移阻尼器会消耗外力对建筑物的冲击能量，减小建筑物的振动幅度，大大降低外部振动对建筑物的冲击和破坏。然而，现有的轴向位移阻尼器存在着诸多不足，例如，振动较小时耗能效率低、消耗振动冲击能量的能力较差，而这些不足极大地影响了建筑物的安全以及人们的生命财产安全。针对现有产品的不足，本发明将轴向位移阻尼器与电涡流阻尼器相结合，提出了一种轴向位移放大型电涡流阻尼器。
 技术问题
本发明的目的是设计一种构造合理、减振效果明显的阻尼器。
 技术解决方案
本发明的技术方案：
一种轴向位移放大型电涡流阻尼器，主要由椭圆空心体1、盖板2、螺栓3、滑杆4、齿轮a5、齿轮b6、齿轮c7、铜片8、永磁体9、滚珠a10、滚珠b11、滚珠c12、隔板13、铰14和U型杆15组成；
所述的椭圆空心体1和盖板2通过螺栓3连接，二者构成整个阻尼装置的外壳；
所述的滑杆4为内部中空的杆体结构，其外表面借助外壳内部的滚珠a10穿过外壳并进行轴向滑动；滑杆4内表面分为上内表面和下内表面，上内表面加工成齿，与齿轮a5咬合；下内表面加工有“凸”字形区域，滚珠b11位于“凸”字形区域的突出位置，滚珠b11位于齿轮a5附近；
所述的齿轮a5的两侧有齿中部无齿，两侧的齿与滑杆4上的齿咬合，中部无齿的部分与滚珠b11紧密贴合；
所述的齿轮b6与齿轮a5固结在一起同时转动，二者的转动轴穿过隔板13；
所述的齿轮c7与齿轮b6咬合，通过隔板13上的滚珠c12进行转动，齿轮c7在两块隔板13之间的部分有齿，剩余部分为无齿的光滑圆柱体；
所述的铜片8固定于齿轮c7端部，随着齿轮c7的转动而转动；
所述的永磁体9位于铜片8两侧；
所述的铰14位于整个装置的端部，可以自由转动。
所述的齿轮b6的半径大于齿轮c7的半径。
所述的整个装置由导磁材料制成，滚珠a10、滚珠b11和滚珠c12为球形钢珠。
所述滑杆的行程通过U型杆和装置外壳进行控制。
本发明的工作原理：
当振动发生时，建筑物的变形会引起阻尼器的伸长或缩短，此时滑杆的滑动会导致齿轮的转动，进而导致铜片在永磁体之间转动。由楞次定律可知，铜片会受到一个抑制其运动的力。这是由于铜片与磁场的相对运动使得铜片中产生了动生电动势，电荷移动形成了电涡流。这些电涡流在磁场的作用下受到洛伦兹力，且方向总是与铜片的运动方向相反，从而形成了阻力，即电涡流阻尼力。与此同时，由于电流的热效应，一部分振能量将被转化为热能，从而起到减小振动的作用。特别地，假定滑杆滑过的距离为d，齿轮a的半径为Ra，齿轮b的半径为Rb，齿轮c的半径为Rc，Rb＞Rc，则可以将铜片的转动角度进行放大，转动的角度为 (d/Ra)×(Rb/Rc)，放大倍数为Rb/Rc，即齿轮b与齿轮c的半径比越大，耗能效率越高。
 有益效果
本发明的有益效果：
（1）本发明的一种轴向位移放大型电涡流阻尼器，将滑杆的轴向运动转化为铜片的转动并产生电涡流进行耗能，采取调整齿轮尺寸的方式将铜片转动放大，较短的滑杆位移即可引起较大角度的铜片转动，耗能效率大大提高；
（2）本发明的一种轴向位移放大型电涡流阻尼器，通过调整永磁体的磁场强度、铜片的厚度、铜片到永磁体的距离，均可以实现阻尼参数的调节；
（3）本发明的一种轴向位移放大型电涡流阻尼器，采用永磁体提供连续不断的磁场源，无需外界能源，能产生长期稳定的减振效果；
（4）本发明的一种轴向位移放大型电涡流阻尼器，采用了导磁材料，可以有效避免磁路的漏磁，不仅提高了电涡流阻尼的效率，而且避免了对周围各种元器件的影响；
（5）本发明的一种轴向位移放大型电涡流阻尼器，设计合理、构造简单、安装方便。
 附图说明
图1为本发明实施例提供的一种轴向位移放大型电涡流阻尼器的A-A剖面图；
图2为本发明实施例提供的一种轴向位移放大型电涡流阻尼器的B-B剖面图；
图3为本发明实施例提供的一种轴向位移放大型电涡流阻尼器的C-C剖面图；
图中：1椭圆空心体；2盖板；3螺栓；4滑杆；5齿轮a；6齿轮b；7齿轮c；8铜片；9永磁体；10滚珠a；11滚珠b；12滚珠c；13隔板；14铰；15U型杆。
 本发明的实施方式
为使得本发明的发明目的、特征、优点能够更加的明显和易懂，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，下面所描述的实施例仅仅是本发明一部分实施例，而非全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图1至图2，本发明实施例提供的种轴向位移放大电涡流阻尼器的一个实施例，包括椭圆空心体1、盖板2、螺栓3、滑杆4、齿轮a 5、齿轮b 6、齿轮c 7、铜片8、永磁体9、滚珠a 10、滚珠b 11、滚珠c 12、隔板13、铰14、U型杆15。
在本实施例中，椭圆空心体1和盖板2通过螺栓3连接，二者构成整个阻尼装置的外壳；
振动发生时，滑杆4借助外壳上的滚珠a 10进行轴向滑动，滑杆4的滑动带动齿轮a 5的转动。在滑杆4的内侧，上部加工成齿，下部在齿轮a 5附近安装滚珠b 11，滚珠b 11周围的滑杆4加工成“凸”字形，滚珠b 11安装在“凸”字形滑杆4突出的部位。齿轮a 5加工成两侧有齿中部无齿的形状，两侧的齿与滑杆4上的齿咬合，中部无齿的部分与滚珠b 11紧密贴合，则齿轮a 5的上下两侧均受力，可防止单侧受力齿轮脱开，提高了传动效率；
齿轮b 6与齿轮a 5固结在一起同时转动，二者的转动轴穿过隔板13；
齿轮c 7与齿轮b 6咬合，齿轮c 7在两块隔板13之间的部分有齿，剩余部分为无齿的光滑圆柱体，整个齿轮c 7穿过隔板13与铜片8连接并同时转动，隔板13上的滚珠c 12起到降低齿轮c 7转动摩擦的作用。永磁体9位于铜片8两侧；
铰14位于整个装置的端部，可以自由转动，使用时起连接结构物和阻尼器的作用；
本发明将滑杆3的轴向运动转化为铜片8的转动并产生电涡流进行耗能，采取调整齿轮尺寸的方式将铜片8转动放大，较短的滑杆3位移即可引起较大角度的铜片8转动，耗能效率大大提高；通过调整永磁体9的磁场强度、铜片8的厚度、铜片8到永磁体9的距离，均可以实现阻尼参数的调节；采用永磁体9提供连续不断的磁场源，无需外界能源，能产生长期稳定的减振效果；采用了导磁材料，可以有效避免磁路的漏磁，不仅提高了电涡流阻尼的效率，而且避免了对周围各种元器件的影响；本发明设计合理、构造简单、安装方便，具有良好的应用前景。
设计本发明时需要注意：第一，齿轮b 6的半径大于齿轮c 7的半径；第二，所述整个装置由导磁材料制成，滚珠为球形钢珠，所有的滚珠涂抹润滑油以减少摩擦；第三，滑杆4中部加工成“凸”字形，齿轮a 5两侧有齿中部无齿，上下两侧均与滑杆4接触，可以防止单侧受力齿轮脱开，以提高传递效率；第四，滑杆4的行程通过U型杆15和装置外壳进行控制。
本发明的上述实施例并不是对本发明保护范围的限定，本发明的实施方式不限于此，凡此种种根据本发明的上述内容，按照本领域的普通技术知识和惯用手段，在不脱离本发明上述基本技术思想前提下，对本发明上述结构做出的其它多种形式的修改、替换或变更，均应落在本发明的保护范围之内。

Claims (5)

  1. 一种轴向位移放大型电涡流阻尼器，其特征在于，所述的轴向位移放大型电涡流阻尼器主要由椭圆空心体（1）、盖板（2）、螺栓（3）、滑杆（4）、齿轮a（5）、齿轮b（6）、齿轮c（7）、铜片（8）、永磁体（9）、滚珠a（10）、滚珠b（11）、滚珠c（12）、隔板（13）、铰（14）和U型杆（15）组成；
    所述的椭圆空心体（1）和盖板（2）通过螺栓（3）连接，二者构成整个阻尼装置的外壳；
    所述的滑杆（4）为内部中空的杆体结构，其外表面借助外壳内部的滚珠a（10）穿过外壳并进行轴向滑动；滑杆（4）内表面分为上内表面和下内表面，上内表面加工成齿，与齿轮a（5）咬合；下内表面加工有“凸”字形区域，滚珠b（11）位于“凸”字形区域的突出位置，滚珠b（11）位于齿轮a（5）附近；
    所述的齿轮a（5）的两侧有齿中部无齿，两侧的齿与滑杆（4）上的齿咬合，中部无齿的部分与滚珠b（11）紧密贴合；
    所述的齿轮b（6）与齿轮a（5）固结在一起同时转动，二者的转动轴穿过隔板（13）；
    所述的齿轮c（7）与齿轮b（6）咬合，通过隔板（13）上的滚珠c（12）进行转动，齿轮c（7）在两块隔板（13）之间的部分有齿，剩余部分为无齿的光滑圆柱体；
    所述的铜片（8）固定于齿轮c（7）端部，随着齿轮c（7）的转动而转动；
    所述的永磁体（9）位于铜片（8）两侧；
    所述的铰（14）位于整个装置的端部，自由转动。
  2. 根据权利要求1所述的轴向位移放大型电涡流阻尼器，其特征在于，所述的齿轮b（6）的半径大于齿轮c（7）的半径。
  3. 根据权利要求1或2所述的轴向位移放大型电涡流阻尼器，其特征在于，所述的整个装置由导磁材料制成，滚珠a（10）、滚珠b（11）和滚珠c（12）为球形钢珠。
  4. 根据权利要求1或2所述的轴向位移放大型电涡流阻尼器，其特征在于，所述的滑杆的行程通过U型杆和装置外壳进行控制。
  5. 根据权利要求3所述的轴向位移放大型电涡流阻尼器，其特征在于，所述的滑杆的行程通过U型杆（15）和装置外壳进行控制。
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