CN113803395B - Eddy current damper of rotating mechanism - Google Patents
Eddy current damper of rotating mechanism Download PDFInfo
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- CN113803395B CN113803395B CN202111166140.2A CN202111166140A CN113803395B CN 113803395 B CN113803395 B CN 113803395B CN 202111166140 A CN202111166140 A CN 202111166140A CN 113803395 B CN113803395 B CN 113803395B
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- eddy current
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- 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
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
- F16F6/005—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid using permanent magnets only
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention provides an eddy current damper of a rotating mechanism, which comprises a shell, a shell cover plate, a circular rack penetrating through the shell, a permanent magnet unit in transmission connection with the circular rack, and an annular conductor fixed in the shell; when the circular rack moves along the axial direction of the circular rack, the permanent magnet unit is driven to rotate, and the permanent magnet unit and the annular conductor generate relative movement. The eddy current damper provided by the invention has the advantages that the consumption of the permanent magnets is small, and a small amount of permanent magnets can amplify the speed through the rotating mechanism to obtain the required damping force; the bearing capacity is high, the friction force is low, and the durability is high; the temperature stability is high, and the frequency application range is wide; the magnetic shielding measures are adopted, and the influence of the magnetic field on the surrounding environment is small; the damping force can be adjusted by adjusting the magnetic field gap, and the damping device has wide application prospect.
Description
Technical Field
The invention belongs to the field of vibration reduction of structures and machines such as buildings, bridges and structures, and particularly relates to an eddy current damper of a rotating mechanism.
Background
Viscous dampers are velocity-dependent energy consuming devices that reduce the velocity or vibration of an object by converting kinetic energy into thermal energy. As a damping unit, a viscous damper, together with a mass unit and a stiffness unit, constitutes a tuned mass damper (Tuned Mass Damper, abbreviated TMD) that absorbs vibration energy of a structure and generates out-of-phase resonance using an inertial system connected to the controlled structure to reduce vibration of the structure due to resonance effects, and optimal vibration damping efficiency is obtained by adjusting the parameters of the three units in relation to the mass and self-vibration frequency of the controlled structure. The conventional TMD includes a mass unit composed of steel, a stiffness unit composed of a spring or a sling, and a damping unit composed of a liquid viscous damper. In addition, due to the deviation of the design quality and the natural vibration frequency of the controlled structure from the actual situation, the vibration frequency and the damping of the TMD often need to be further adjusted according to the actual situation.
The conventional liquid viscous damper has the following problems: 1) The damping force cannot be adjusted after installation; 2) When the sealing ring works frequently, the sealing ring is easy to wear, so that oil leakage is caused, and the sealing ring belongs to a vulnerable part which needs to be replaced; 3) Because the piston rod is hooped by the sealing ring, the friction force is large, and the damper is not easy to start; 4) The influence of the external environment temperature change on the damping performance is large; 5) The long-time operation causes the temperature rise in the damper to have a great influence on the damping performance.
Currently, technicians apply eddy current dampers to TMDs instead of liquid viscous dampers, but more are single-sided plate-type eddy current dampers. The eddy current damper provides damping force through Lorentz force generated by relative motion between the permanent magnet and a conductor at one side of the eddy current damper, and particularly, a gap (magnetic field gap) exists between the permanent magnet and the conductor, the relative motion of the two causes a magnetic field of the permanent magnet to cut the conductor, induced eddy currents are generated in the conductor, an electromagnetic field of the induced eddy currents is opposite to the magnetic field of the permanent magnet, and damping force for preventing the relative motion of the permanent magnet and the conductor is generated. The damping force is proportional to the relative movement speed and increases sharply with decreasing magnetic field gap. Most of the existing eddy current dampers are single-side plate type eddy current dampers, for example, patent CN201310080464.3 and CN201610870649.8, a plane or curved surface formed by a permanent magnet array is parallel to a plane or curved surface formed by a conductor, and a gap exists between the plane or curved surface and the plane or curved surface, so that relative motion on the plane or curved surface is generated.
However, the plate type eddy current damper has the following problems: 1) The size of the magnetic field gap is difficult to ensure when vibration occurs in the direction perpendicular to the plane or curved surface of the permanent magnet and the conductor, the damping force is unstable, and the permanent magnet and the conductor are easy to collide under the condition of smaller magnetic field gap; 2) When the areas of the required permanent magnet and the conductor are large, the magnetic field gap is difficult to ensure due to machining and installation errors and dead weight deformation, and damping force deviation is difficult to control; 3) Because of problems 1) and 2), the magnetic field gap cannot be made small, and the magnetic field energy utilization rate is not high; 4) The area is large and the arrangement is not easy; 5) The number of the required permanent magnets is large, the permanent magnet attractive force is large (the large permanent magnet attractive force is usually tens of kilograms), the manual installation is difficult, and the permanent magnet is often damaged or injured during the installation.
To overcome the problems of plate-type eddy current dampers, other types of eddy current dampers have been developed by researchers. For example, patent CN201610895139.6 provides an intelligent eddy current sensing damping device, a piston rod is inserted in the center of an electromagnetic shielding cover of the device, the bottom end of the piston rod is connected with a permanent magnet unit, a copper conductor is fixed inside the electromagnetic shielding cover, a permanent magnet is fixed at the bottom of the copper conductor, and the permanent magnet unit at the bottom end of the piston rod and the permanent magnet at the bottom of the copper conductor are relatively displaced in the movement of the piston rod to generate damping force.
Patent CN201410475528.4 discloses a large axial eddy current damper made by spiral transmission, comprising a transmission assembly and an eddy current damping generator, wherein the transmission assembly comprises a spiral transmission pair (ball screw) and a stator and a rotor made of magnetic conductive materials; the screw rod of the screw transmission pair penetrates through the damper main body, the stator is arranged on the upper flange plate and the lower flange plate, the rotor comprises an outer rotor and an inner rotor, the bottom end of the inner rotor is provided with the lower connecting flange plate, and one or more eddy current damping generators (permanent magnets and conductors) are arranged between the stator and the outer rotor. The device adopts ball screw transmission, and axial force applies pressure to the ball, makes axial motion change into pivoting motion through the guide of screw raceway, because ball screw has adopted the steel ball as the operation bearing, bearing capacity is lower to the requirement to lubrication condition is higher, needs the periodic oiling lubrication. Meanwhile, the requirements on the use environment are also improved, and the dust prevention is needed to be paid attention to, so that impurities are prevented from entering the rollaway nest.
Patent CN207437653U discloses a seat-type internal rotation type axial eddy current damper, in which an inner cylinder can rotate in an outer cylinder, multiple groups of eddy current damping components are arranged along the axial direction of the inner cylinder or the outer cylinder, a coil component of the eddy current damping component is wound on the outer wall of the inner cylinder along the axial direction of the inner cylinder, and a magnetic sheet of a magnetic component is arranged on the inner wall of the outer cylinder along the axial direction of the outer cylinder. The device also adopts an internal rotation mode to realize the movement of the magnetic sheet, thereby improving the magnetic field utilization rate.
At present, although the damping effect is amplified by some eddy current dampers, the eddy current dampers have complex structures and low bearing capacity, most of the eddy current dampers adopt a plane rotation mode of a transmission shaft method, the requirements on the transmission structure are very high, the friction force is large under the condition of no lubrication, the abrasion is serious, the maintenance is difficult, and the damping force is difficult to adjust according to the debugging requirement of TMD.
Disclosure of Invention
In order to solve at least one of the technical problems, the invention adopts the technical scheme that the eddy current damper of the rotating mechanism is provided with a small number of permanent magnets, adjustable damping force and stable and reliable operation.
In order to at least achieve one of the above purposes, the present invention adopts the following technical scheme:
the invention provides an eddy current damper of a rotating mechanism, which comprises a shell, a shell cover plate, a circular rack penetrating through the shell, a permanent magnet unit in transmission connection with the circular rack, and an annular conductor fixed in the shell; when the circular rack moves along the axial direction of the circular rack, the permanent magnet unit is driven to rotate, and the permanent magnet unit and the annular conductor generate relative movement.
Further, the permanent magnet unit comprises a gear, a self-lubricating washer, a gear shaft pore plate I, a gear shaft pore plate II, a gear cover plate I, a gear cover plate II, a rotating arm, a universal ball and a permanent magnet, wherein the gear shaft penetrates through the self-lubricating washer, the gear cover plate I, the gear cover plate II and the rotating arm, and two ends of the gear shaft are fixedly connected to the gear shaft pore plate I and the gear shaft pore plate II; permanent magnets are fixedly connected to the two ends of the radial arm, and universal balls are further fixed on the radial arm and located on the inner sides of the permanent magnets.
Further, the gear shaft hole plate I is fixedly connected with the self-lubricating gasket, the self-lubricating gasket is attached to the gear, and the gear, the gear cover plate I, the gear cover plate II and the radial arm are relatively and fixedly connected.
Further, the annular conductor is fixed to an inner surface of the housing, the annular conductor corresponding to a rotational path of the permanent magnet.
Further, the universal ball is connected to the radial arm through a universal ball screw, a universal ball gasket is arranged on the universal ball screw between the universal ball and the radial arm, and the gap between the permanent magnet and the annular conductor can be adjusted by adjusting the number of the universal ball gaskets.
Further, the first gear shaft pore plate is welded on the cover plate of the shell, and the second gear shaft pore plate is welded inside the shell.
Further, the lower part of the shell is provided with an inner supporting frame, the upper part of the shell and the upper part of the inner supporting frame are respectively provided with through holes, graphite copper sleeves are respectively wedged in the two through holes, the circular rack penetrates through the two graphite copper sleeves and is meshed with a gear in the middle of the shell, a limit screw and a limit gasket are arranged at the bottom of the circular rack, and the diameter of the limit gasket is larger than the aperture of the graphite copper sleeves.
Further, an upper joint bearing is fixedly connected to the top of the circular rack, and a lower joint bearing is fixedly connected to the bottom of the inner support frame.
Further, a cover plate screw is arranged between the second gear cover plate and the radial arm, a cover plate gasket is arranged on the cover plate screw, and the contact between the universal ball and the shell is ensured by adjusting the number of the cover plate gaskets.
Compared with the prior art, the eddy current damper of the rotating mechanism has the beneficial effects that:
(1) The relative movement speed of the permanent magnet and the conductor is amplified by the rotating mechanism, and a small amount of permanent magnet is used for obtaining the required damping force through the amplifying mechanism, so that the dosage of the permanent magnet is greatly reduced; the damping force of the damping device is F= nCV (D 2 /D 1 ) 2 Wherein n is the number of permanent magnets; c is the damping coefficient of the permanent magnet; v is the axial movement speed of the circular rack; d (D) 2 Is the distance between the centers of the permanent magnets at the two ends of the radial arm; d (D) 1 Is the diameter of the gear reference circle. For example, the movement speed is amplified 7 times (D 2 /D 1 =7) the damping force can be amplified by 49 times;
(2) The permanent magnet consumption is reduced, so that the difficulty and risk of permanent magnet installation can be reduced;
(3) The bearing capacity of the rack and pinion transmission mechanism is high;
(4) The transmission mechanism has low friction and high durability;
(5) The magnetic conduction effect of the carbon steel shell and the shell cover plate has a magnetic shielding effect while the damping effect is increased, so that the influence of a magnetic field on the surrounding environment can be reduced;
(6) Damping force can be adjusted by adjusting the magnetic field gap;
(7) The temperature rise is slow at high cycle times and the performance is stable at various operating frequencies.
In a word, the invention provides the eddy current damper of the rotating mechanism, which has the advantages that the number of the permanent magnets is small, the required damping force can be obtained by the amplification speed of a small number of the permanent magnets through the rotating mechanism, the operation is stable and reliable, and the eddy current damper has wide application prospect.
Drawings
FIG. 1 is a schematic view of the structure of an eddy current damper according to the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 isbase:Sub>A sectional view taken along the direction A-A of FIG. 2;
FIG. 4 is a B-B cross-sectional view of FIG. 3;
FIG. 5 is a hysteresis curve of the present invention eddy current damper;
the device comprises an upper joint bearing 101, a lower joint bearing 102, a round rack 2, a graphite copper sleeve 3, a graphite copper sleeve 301, a graphite copper sleeve 302, a limit screw 4, a gear 5, a self-lubricating gasket 6, a gear shaft 7, a gear shaft hole plate I801, a gear shaft hole plate II 802, a gear cover plate I901, a gear cover plate II 902, a rotating arm 10, a universal ball 11, a permanent magnet 12, a ring conductor 13, a shell 14, an inner support frame 15, a lug plate 16 and a shell cover plate 17.
Detailed Description
In order to enable those skilled in the art to better understand the technical scheme of the present invention, the present invention will be further described in detail with reference to specific embodiments. It is noted that the embodiments described below are exemplary only for explaining the present invention, and are not to be construed as limiting the present invention. The examples are not to be construed as limiting the specific techniques or conditions described in the literature in this field or as per the specifications of the product.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the mechanical connection and the electrical connection can be adopted; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Hereinafter, the eddy current damper of the rotating mechanism provided by the invention will be described in detail by way of specific embodiments:
as shown in fig. 1 to 4, the eddy current damper of the rotating mechanism comprises a shell 14, a shell cover plate 17, a circular rack 2 penetrating through the shell 14, a permanent magnet unit in transmission connection with the circular rack 2, and an annular conductor 13 fixed inside the shell 14; when the circular rack 2 moves along the axial direction, the permanent magnet unit is driven to rotate, the permanent magnet unit and the annular conductor 13 move relatively, and the shell cover plate 17 is fixedly connected to the shell 14 through the lug plate 16 by screws.
The permanent magnet unit comprises a gear 5, a self-lubricating gasket 6, a gear shaft 7, a gear shaft hole plate I801, a gear shaft hole plate II 802, a gear cover plate I901, a gear cover plate II 902, a radial arm 10, a universal ball 11 and a permanent magnet 12, wherein the gear shaft 7 sequentially passes through the self-lubricating gasket 6, the gear 5, the gear cover plate I901, the gear cover plate II 902 and the radial arm 10, the gear shaft hole plate I801 is welded on a shell cover plate 17, the gear shaft hole plate II 802 is welded on a shell 14, and two ends of the gear shaft 7 are respectively wedged into the gear shaft hole plate I801 and the gear shaft hole plate II 802; the gear shaft hole plate I801 is fixedly connected with the self-lubricating washer 6 through screws, the self-lubricating washer 6 is attached to the gear 5, and the gear 5, the gear cover plate I901, the gear cover plate II 902 and the radial arm 10 are fixedly connected through screws; the second gear cover 902 is longer than the diameter of the gear in the radial arm direction, an extension part is formed, a cover screw is arranged between the extension part and the radial arm, a cover gasket is arranged on the cover screw, and the contact between the universal ball 11 and the housing 14 is ensured by adjusting the number of the cover gaskets.
According to the radial arm 10, permanent magnets 12 are connected to the two ends of the radial arm 10 close to annular conductors 13 through screws, universal balls 11 are further fixed on the radial arm 10, and the universal balls 11 are located on the inner sides of the permanent magnets 12; the universal ball 11 is connected to the radial arm 10 through a universal ball screw, a universal ball gasket is arranged on the universal ball screw between the universal ball 11 and the radial arm 10, and the magnetic field gap between the permanent magnet 12 and the annular conductor 13 can be adjusted by adjusting the number of the universal ball gaskets.
An annular conductor 13 according to the present invention is bonded to the inner surface of the housing 14, said annular conductor 13 corresponding to the rotational path of said permanent magnet 12.
According to the invention, the shell 14 is round-like, an inner supporting frame 15 is arranged at the lower part of the shell 14, through holes are respectively arranged at the upper part of the shell and the upper part of the inner supporting frame, graphite copper sleeves 3 are respectively wedged at the two through holes, two ends of the round rack 2 respectively penetrate through an upper graphite copper sleeve 301 of the shell and a lower graphite copper sleeve 302 on the inner supporting frame and are meshed with a gear 5 at the middle part of the shell 14, a limit screw 4 and a limit gasket are arranged at the bottom of the round rack 2, and the diameter of the limit gasket is larger than the aperture of the lower graphite copper sleeve; the top of the circular rack 2 is fixedly connected with an upper knuckle bearing 101, and the bottom of the inner support frame is fixedly connected with a lower knuckle bearing 102.
The invention provides a working principle of an eddy current damper of a rotating mechanism, which specifically comprises the following steps:
the upper knuckle bearing 101 and the lower knuckle bearing 102 are connected to two points on the controlled object with a speed difference, respectively, to cause axial movement of the circular rack 2. The axial amplitude and the movement speed of the circular rack 2 are converted into rotary movement by the gear 5 and are transmitted to the radial arm 10, and the movement speed of the permanent magnet 12 at the end part of the radial arm 10 is amplified by the lever principle. The relative movement of the permanent magnet 12 and the annular conductor 13 causes induced eddy currents to be generated in the annular conductor 13, the electromagnetic field of which is opposite to the magnetic field of the permanent magnet 12 and generates a damping force that resists the relative movement of the permanent magnet 12 and the annular conductor 13, and the carbon steel housing 14 of the magnetic effect will amplify the eddy current effect in the conductor. Due to the amplification effect, only a small amount of permanent magnets are needed to achieve the target damping. The rack and pinion transmission mechanism is simple and reliable, and can easily realize larger bearing capacity. The self-lubricating washer 6 and the universal ball 11 are adopted, and proper lubricant is smeared on the gear 5, so that the wear resistance of the mechanism can be improved, and the service life can be prolonged. If the damping force needs to be adjusted twice, the gap between the permanent magnet 12 and the annular conductor 13 can be adjusted.
The damping performance of the eddy current damper adopting the rotating mechanism provided by the invention in practical application is as follows:
the lower joint bearing of the electric vortex damper is connected with a fixed base, the upper joint bearing is connected with a hydraulic oil cylinder, sinusoidal displacement with a fixed period is applied through the hydraulic oil cylinder, the axial displacement time course of the circular rack and the load time course of the hydraulic oil cylinder are recorded, and a hysteresis curve is drawn. The eddy current damper is adjusted to different magnetic field gaps and the process is repeated.
As shown in FIG. 5, the hysteresis curves from the curve "magnetic field gap 5" to the curve "magnetic field gap 1" are sequentially reduced, and then the damping force of the eddy current damper is sequentially increased, so that the hysteresis curve area is also increased. While other types of eddy current dampers, such as plate-type eddy current dampers, require nearly 50 times the number of permanent magnets to achieve the same damping force. It has been proved that the eddy current damper can achieve a desired damping force with a small amount of permanent magnets through the amplifying mechanism, and the damping force can be changed by adjusting the magnetic field gap.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Claims (8)
1. The eddy current damper of the rotating mechanism is characterized by comprising a shell, a shell cover plate, a circular rack penetrating through the shell, a permanent magnet unit in transmission connection with the circular rack and an annular conductor fixed inside the shell; when the circular rack moves along the axial direction of the circular rack, the circular rack drives a permanent magnet unit to rotate, the permanent magnet unit and the annular conductor generate relative motion, the permanent magnet unit comprises a gear, a self-lubricating gasket, a gear shaft pore plate I, a gear shaft pore plate II, a gear cover plate I, a gear cover plate II, a rotating arm, a universal ball and a permanent magnet, the gear shaft penetrates through the self-lubricating gasket, the gear cover plate I, the gear cover plate II and the rotating arm, and two ends of the gear shaft are fixedly connected to the gear shaft pore plate I and the gear shaft pore plate II; permanent magnets are fixedly connected to the two ends of the radial arm, and universal balls are further fixed on the radial arm and located on the inner sides of the permanent magnets.
2. The rotary mechanism eddy current damper according to claim 1, wherein the gear shaft orifice plate one is fixedly connected with a self-lubricating washer, the self-lubricating washer is attached to the gear, and the gear, the gear cover plate one, the gear cover plate two and the radial arm are relatively fixedly connected.
3. An eddy current damper for a rotary mechanism according to claim 2, wherein the annular conductor is fixed to an inner surface of the housing, the annular conductor corresponding to a rotational path of the permanent magnet.
4. A rotary mechanism eddy current damper according to claim 3, wherein the universal ball is connected to the radial arm via a universal ball screw, a universal ball washer is provided on the universal ball screw between the universal ball and the radial arm, and the gap between the permanent magnet and the annular conductor is adjustable by adjusting the number of the universal ball washers.
5. The rotary mechanism eddy current damper according to claim 4, wherein the first gear shaft orifice plate is welded to the housing cover plate and the second gear shaft orifice plate is welded to the housing interior.
6. The electric vortex damper of the rotating mechanism according to claim 5, wherein the lower part of the outer shell is provided with an inner supporting frame, the upper part of the outer shell and the upper part of the inner supporting frame are respectively provided with through holes, graphite copper sleeves are respectively wedged in the two through holes, the circular rack penetrates through the two graphite copper sleeves and is meshed with a gear in the middle part of the outer shell, a limit screw and a limit gasket are arranged at the bottom of the circular rack, and the diameter of the limit gasket is larger than the aperture of the graphite copper sleeves.
7. The rotary mechanism eddy current damper according to claim 6, wherein the top of the circular rack is fixedly connected with an upper knuckle bearing, and the bottom of the inner support frame is fixedly connected with a lower knuckle bearing.
8. The eddy current damper of a rotary mechanism as recited in claim 7, wherein a cover screw is disposed between the second gear cover plate and the radial arm, and a cover washer is disposed on the cover screw, and the universal ball is in contact with the housing by adjusting the number of the cover washers.
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| CN202111166140.2A CN113803395B (en) | 2021-09-30 | 2021-09-30 | Eddy current damper of rotating mechanism |
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| CN202111166140.2A CN113803395B (en) | 2021-09-30 | 2021-09-30 | Eddy current damper of rotating mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR1214953A (en) * | 1958-10-14 | 1960-04-13 | Advanced magnetic damper | |
| JP2008185184A (en) * | 2007-01-31 | 2008-08-14 | Bridgestone Corp | Vibration absorbing machine for in-wheel motor |
| CN107339001A (en) * | 2017-07-03 | 2017-11-10 | 同济大学 | Gear type current vortex inertia damping device |
| WO2020146594A1 (en) * | 2019-01-09 | 2020-07-16 | Green Wave Power Systems Llc | Magnetically-coupled torque-assist apparatus |
| CN109751352B (en) * | 2019-03-04 | 2023-11-24 | 大连理工大学 | Axial displacement amplification type eddy current damper |
| WO2021051373A1 (en) * | 2019-09-20 | 2021-03-25 | 大连理工大学 | Inertial mass amplification tuned mass damper |
| US11293175B2 (en) * | 2019-09-20 | 2022-04-05 | Dalian University Of Technology | Self-resetting tuned mass damper based on eddy current and shape memory alloy technology |
| CN110965662A (en) * | 2019-12-09 | 2020-04-07 | 同济大学 | Energy-consuming connecting beam |
| CN112178104A (en) * | 2020-11-06 | 2021-01-05 | 大连理工大学 | Rapid Assembly length self-adaptation type eddy current damper |
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