CN203743282U - Axial eddy-current retarder based on screw drive mode - Google Patents
Axial eddy-current retarder based on screw drive mode Download PDFInfo
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- CN203743282U CN203743282U CN201420129007.9U CN201420129007U CN203743282U CN 203743282 U CN203743282 U CN 203743282U CN 201420129007 U CN201420129007 U CN 201420129007U CN 203743282 U CN203743282 U CN 203743282U
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- magnet
- disk
- eddy current
- lower disc
- screw
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Abstract
The utility model relates to an axial eddy-current retarder based on a screw drive mode. The axial eddy-current retarder comprises a screw pair drive assembly and a rotary eddy-current damping generator, wherein the rotary eddy-current damping generator comprises an upper disk and a lower disk, the upper disk and the lower disk are the same in size, arranged in parallel in an upper and lower mode and made of permeability magnetic materials, a rotary disk made of conducting materials or permeability magnetic materials is arranged between the upper disk and the lower disk and parallel to the upper disk, the rotary disk is installed on the screw pair drive assembly and rotates along with the screw pair drive assembly, a plurality of pairs of magnets are further arranged between the upper disk and the lower disk, and an upper magnet and a lower magnet in each pair of magnets are opposite in magnetic pole polarity. According to the axial eddy-current retarder, axial movement of a controlled structure is converted into rotating movement of an internal structure of the retarder for control through a screw pair, control efficiency is substantially improved, the ratio of damping force of the eddy-current retarder to the weight of the redarder is increased to the level same as or higher than the level of a viscous fluid damper.
Description
Technical field
The utility model relates to a kind of large-scale axial eddy current damper that utilizes screw drive mode to make, be specially adapted to frequency of okperation low and require that damping constant is large, the passive and half active vibration control of large scale civil engineering structure that working stroke is long.
Background technique
The basic principle that eddy-current damping produces is: in the time of conductor plate cutting magnetic line in magnetic field, can in conductor plate, produce electric convolution, electric convolution can produce again the new magnetic field contrary with magnetic field, thereby between former magnetic field and conductor, form the damping force that hinders the two relative movement, the electricresistance effect of while conductor plate is converted to thermal dissipation by the kinetic energy of conductor plate by electric convolution and goes out.If conductor plate is connected with vibrational structure, just can produce the effect of structural vibration reduction and power consumption, become eddy current damper.Compared with some damping devices conventional with field of vibration control, eddy current damper does not rely on mechanical friction power consumption, there is no the yet problem of not leakage and sealing just of working fluid, have that reliability is high, the good endurance advantage such as simple relative to structure, be therefore particularly suitable for being used in and require the long and working environment of easy care not fatigue life.At present, eddy current damper has been widely used as the callipers brake truck system of truck.Because magnet and conductor plate are all the materials that density of mass is very high, compare with the Effects of Viscous Fluid Damper that possesses identical damping constant and maximum damping force, adopt the eddy current damper of same movement mode often heavily a lot, much larger.Calculating shows, make an axial eddy current damper that produces 10kN damping force under the speed of one centimetre per second by directly adopting axial relative movement mode between magnet and conductor, its weight is than high one to two order of magnitude of Effects of Viscous Fluid Damper, without use value.Therefore improve the damping force and own wt ratio of eddy current damper, the eddy current damper of producing large damping constant is in field of civil engineering promotion and application eddy-current damping technology key issue urgently to be resolved hurrily.At present the published axial eddy current damper utility model patent of China mainly from prevent leakage field and optimize magnetic Circuit Design approach go to improve the performance of damper, limited with the effect of own wt ratio to improving damping force.
Summary of the invention
The purpose of this utility model is, for the deficiencies in the prior art, a kind of axial eddy current damper based on screw drive mode is provided, the damping constant of rotary electric eddy current damping part can be amplified to hundreds and thousands of times, change very large axial damping constant into, solve the axial damper problem that general electric convolution mode is difficult to make large damping constant, be specially adapted to frequency of okperation low and require the vibration control of the large scale civil engineering structure of very large damping constant, simple in structure durable.
The technical solution of the utility model is, a kind of axial eddy current damper based on screw drive mode, comprises transmitting assemblies, rotary electric eddy current damping producer, and described transmitting assemblies is screw pair transmitting assemblies; It is in the same size and by upper disk and the lower disc be made up of permeability magnetic material that be arranged in parallel up and down that described rotary electric eddy current damping producer comprises, described screw pair transmitting assemblies runs through upper disk and lower disc along the axial direction of upper disk and lower disc, and between upper disk and lower disc, being provided with the rotating disk by conductive material or permeability magnetic material made parallel with upper disk, described rotating disk is arranged on screw pair transmitting assemblies and with screw pair transmitting assemblies and rotates; Between described upper disk and lower disc, be also provided with multipair magnet, the every pair of magnet comprises upper magnet and is arranged on the lower magnet of upper magnet below along upper disk axial direction, and the pole polarity that in described every pair of magnet, upper magnet is relative with lower magnet is contrary; Described rotary electric eddy current damping producer is also provided with two ends are connected and provide respectively magnetic conductive loop column with upper disk, lower disc, and described upper magnet and lower magnet are all placed between column and screw pair transmitting assemblies.
Described upper magnet, lower magnet all and between column leave space.
According to the implementation of eddy-current damping, the technological scheme that the utility model adopts comprises two kinds of the fixed scheme of magnet and the rotary schemes of magnet.
The fixed scheme of magnet is: upper magnet is arranged on disk bottom surface, and lower magnet is arranged on lower disc end face, and rotating disk is conductive material; Column can arrange the column consistent with upper magnet quantity, and column with corresponding upper magnet in the radial alignment of upper disk; Column can also be arranged to the ring of sealing; Upper magnet, lower magnet all and between rotating disk leave space.Above two kinds of column set-up modes all can be realized the shortest object with preventing leakage field of magnetic circuit.While wherein the column consistent with upper magnet quantity being set, can alleviate damper structure weight; And when ring column is set, ring column and upper lower disc can form the cavity of a firm sealing, protection internal structure, and can thoroughly eliminate leakage field phenomenon.
In the time that rotating disk rotates, cut the magnetic line of force of magnet, in rotating disk, produce immediately electric convolution, produce the damping force that hinders rotating disk rotation simultaneously.Every pair of magnet produces one vertically by the high magnetic fields of rotating disk, and rotating disk should keep with upper lower magnet 2 to 3mm distance; Magnet layout is along the circumferential direction according to the shortest principle arrangement of magnetic circuit.
Magnet is generally used permanent magnet, as requires king-sized magnetic intensity or carry out half ACTIVE CONTROL, should adopt electromagnet.Rotating disk is made up of excellent conductive material, as electrician's red copper.Described upper disk, lower disc and column are all made up of the good material of magnetic property, for example electrician's soft iron or low carbon steel.
Rotary magnet type scheme is: described upper magnet is arranged on the end face of rotating disk, and lower magnet correspondence is arranged on the bottom surface of rotating disk, and in the bottom surface of upper disk, the upper interior disk of being made up of conductive material is installed, the end face of lower disc is installed the lower interior disk of being made up of conductive material, and described rotating disk is permeability magnetic material.In the time that rotating disk drives upper and lower magnet to rotate together, the magnetic field forming between upper and lower magnet also can rotate thereupon together, so upper interior disk and lower interior disk meeting cutting magnetic line produce eddy current effect.Rotary magnet type scheme must be the ring of sealing by column design, and the closed cavity cylindrical body being formed by column, upper disk and lower disc like this can ensure to provide all the time the shortest magnetic circuit can't leakage field in magnet rotary course.
Described screw pair transmitting assemblies comprise along upper disk and lower disc axial direction run through upper disk and lower disc and do axial motion screw rod, be arranged on screw rod and be placed in the nut between upper disk and lower disc, described rotating disk is arranged on nut; The top of described screw rod is provided with upper connecting rod, and described lower disc bottom surface is provided with the lower support post that covers on screw rod bottom, and is provided with lower connecting rod in lower support column bottom.
Described nut is connected with upper disk by upper bearing (metal), and described nut is connected with lower disc by lower bearing.
Described screw drive mode can be the screw drive mode of slip screw transmission, rolling spiral drive, static pressure power screw and other all broad sense, and described screw pair transmitting assemblies can be the transmitting assemblies that slip screw transmitting assemblies, rolling spiral drive assembly, static pressure power screw assembly and other all screw pair structures form.
Conductive material can be electrician's red copper or other excellent conductive material, and permeability magnetic material can be other permeability magnetic materials such as electrician's soft iron or low carbon steel.
Working principle of the present utility model is described as follows:
After 2 of the Relative Vibration of the upper and lower connecting rod of described damper and controlled structures are connected, structural vibration forces screw rod to make axially reciprocating, and the screw pair that this motion is made up of screw rod and nut changes rotatablely moving of rotating disk into.Between the every a pair of upper and lower magnet of fixed magnets formula scheme, form a stable magnetic field, the rotating disk circumgyration incision magnetic line of force of conductive material, produces eddy current effect; In the time adopting rotary magnet type embodiment, the magnetic field forming between every pair of magnet rotates with rotating disk, so the upper interior disk of electric conductor and lower interior disk cutting magnetic line produce eddy current effect.The damping force that eddy current effect produces forms a large moment of torsion to running shaft, and this moment of torsion is converted to again the damping force of a very large obstruction screw axial motion through screw pair, so damper has obtained very large damping constant.If the eddy-current damping coefficient at every pair of magnet place is C
e, can prove, in the time disregarding frictional force, the equivalent axis of described damper to damping constant C is
In formula
nfor magnet logarithm,
rfor magnet center is to the distance of rotating shaft center,
hit is the helical pitch of screw rod.Due to
rmuch larger than
h, described damper Equivalent damping coefficient
ccan reach singly hundreds and thousands of times to magnet place damping constant.Trial-production model machine verified this feature.
It is low and require the vibration control of the large scale civil engineering structure of very large damping constant that the utility model is specially adapted to frequency of okperation, simple in structure durable except possessing eddy current damper, with outside the intrinsic advantages such as maintenance, it is compared and has the following advantages with existing Effects of Viscous Fluid Damper technology hardly:
1) described damper is converted into rotatablely moving of damper internal structure by screw pair the axial motion of controlled structures and controls, realized the significantly raising of control efficiency, the damping force of axial eddy current damper with own wt than peer-level or the higher level of having brought up to Effects of Viscous Fluid Damper.
2) described damper only need to increase spiro rod length and just can increase the working stroke of damper, little because increasing the cost that stroke increases.And Effects of Viscous Fluid Damper must increase piston rod length and oil cylinder length could increase damper working stroke simultaneously, this makes large stroke Effects of Viscous Fluid Damper expensive especially.
3) described damper can by increase rotating disk diameter, increase magnets magnetic fields intensity, increase magnet three kinds of modes such as quantity and the quantity that increases electric convolution producer are increased the damping constant of damper, be applicable to manufacturing large, medium and small all types of dampers.
4) the screw pair transmission that described damper adopts is a kind of mechanical drive mode of standard, and therefore this damper is easy to realize standardization batch production.
5) adopt electromagnet just can realize half ACTIVE CONTROL, compared with MR damper, cost simple in structure is low.
Brief description of the drawings
Fig. 1 is the utility model embodiment 1 structural representation;
Fig. 2 is the layout schematic diagram of upper magnet on upper disk in the utility model embodiment 1;
Fig. 3 is the layout schematic diagram of lower magnet on lower disc in the utility model embodiment 1;
Fig. 4 is the utility model embodiment 2 structural representation;
Fig. 5 be in the utility model embodiment 2 upper magnet at the layout schematic diagram of rotating disk end face;
Fig. 6 be in the utility model embodiment 2 lower magnet at the layout schematic diagram of rotating disk bottom surface.
Embodiment
embodiment 1
As shown in Figure 1, a kind of axial eddy current damper based on screw drive mode, comprise screw pair transmitting assemblies, rotary electric eddy current damping producer, it is in the same size and by the upper disk 3 of being made up of permeability magnetic material and the lower disc 9 that be arranged in parallel up and down that described rotary electric eddy current damping producer comprises, described screw pair transmitting assemblies runs through upper disk 3 and lower disc 9 along the axial direction of upper disk 3 and lower disc 9, and between upper disk 3 and lower disc 9, be provided with the rotating disk by conductive material made 4 parallel with upper disk 3, described rotating disk 4 is arranged on screw pair transmitting assemblies and with screw pair transmitting assemblies and rotates, between described upper disk 3 and lower disc 9, be also provided with 8 pairs of magnets, the every pair of magnet comprises upper magnet 1 and is arranged on the lower magnet 15 of upper magnet 1 below along upper disk 3 axial directions, and the pole polarity that in described every pair of magnet, upper magnet 1 is relative with lower magnet 15 is contrary, described rotary electric eddy current damping producer is also provided with two ends are connected and provide respectively magnetic conductive loop column 2 with upper disk 3, lower disc 9, and described upper magnet 1 and lower magnet 15 are all placed between column 2 and screw pair transmitting assemblies.Upper magnet 1, lower magnet 15 all and between column 2 leave space, and upper magnet 1, lower magnet 15 all and between rotating disk leaves space.
Screw pair transmitting assemblies comprise along upper disk 3 and lower disc 9 axial directions run through upper disk 3 and lower disc 9 and do axial motion screw rod 7, be arranged on screw rod 7 and be placed in the nut 8 between upper disk 3 and lower disc 9, described rotating disk 4 is arranged on nut 8; The top of described screw rod 7 is provided with upper connecting rod 6, and described lower disc 9 bottom surfaces are provided with the lower support post 11 that covers on screw rod 7 bottoms, and are provided with lower connecting rod 12 in lower support post 11 bottoms.Nut 8 is connected with upper disk 3 by upper bearing (metal) 5, and described nut 8 is connected with lower disc 9 by lower bearing 10.
As shown in Figure 2 and Figure 3, upper magnet 1 is arranged on disk 3 bottom surfaces, and lower magnet 15 is arranged on lower disc 9 end faces.8 columns 2 are set, and column 2 with corresponding upper magnet 1 in the radial alignment of upper disk 3.
Conductive material is electrician's red copper, and permeability magnetic material is electrician's soft iron.
embodiment 2
As shown in Figure 4, a kind of axial eddy current damper based on screw drive mode, comprise screw pair transmitting assemblies, rotary electric eddy current damping producer, it is in the same size and by the upper disk 3 of being made up of permeability magnetic material and the lower disc 9 that be arranged in parallel up and down that described rotary electric eddy current damping producer comprises, described screw pair transmitting assemblies runs through upper disk 3 and lower disc 9 along the axial direction of upper disk 3 and lower disc 9, and between upper disk 3 and lower disc 9, be provided with the rotating disk by permeability magnetic material made 4 parallel with upper disk 3, described rotating disk 4 is arranged on screw pair transmitting assemblies and with screw pair transmitting assemblies and rotates, between described upper disk 3 and lower disc 9, be also provided with 8 pairs of magnets, the every pair of magnet comprises upper magnet 1 and is arranged on the lower magnet 15 of upper magnet 1 below along upper disk 3 axial directions, and the pole polarity that in described every pair of magnet, upper magnet 1 is relative with lower magnet 15 is contrary, described rotary electric eddy current damping producer is also provided with two ends are connected and provide respectively magnetic conductive loop column 2 with upper disk 3, lower disc 9, and described upper magnet 1 and lower magnet 15 are all placed between column 2 and screw pair transmitting assemblies.Upper magnet 1, lower magnet 15 all and between column 2 leave space.
Screw pair transmitting assemblies comprise along upper disk 3 and lower disc 9 axial directions run through upper disk 3 and lower disc 9 and do axial motion screw rod 7, be arranged on screw rod 7 and be placed in the nut 8 between upper disk 3 and lower disc 9, described rotating disk 4 is arranged on nut 8; The top of described screw rod 7 is provided with upper connecting rod 6, and described lower disc 9 bottom surfaces are provided with the lower support post 11 that covers on screw rod 7 bottoms, and are provided with lower connecting rod 12 in lower support post 11 bottoms.Nut 8 is connected with upper disk 3 by upper bearing (metal) 5, and described nut 8 is connected with lower disc 9 by lower bearing 10.
As shown in Figure 5, Figure 6, upper magnet 1 is arranged on the end face of rotating disk 4, and lower magnet 15 correspondences are arranged on the bottom surface of rotating disk 4, and in the bottom surface of upper disk 3, the upper interior disk 13 of being made up of conductive material is installed, the end face of lower disc 9 is installed the lower interior disk 14 of being made up of conductive material.Column 2 is the ring of sealing.
Conductive material is electrician's red copper, and permeability magnetic material is electrician's soft iron.
Claims (8)
1. the axial eddy current damper based on screw drive mode, comprises transmitting assemblies, rotary electric eddy current damping producer, it is characterized in that, described transmitting assemblies is screw pair transmitting assemblies; It is in the same size and by the upper disk (3) of being made up of permeability magnetic material and the lower disc (9) that be arranged in parallel up and down that described rotary electric eddy current damping producer comprises, described screw pair transmitting assemblies runs through upper disk (3) and lower disc (9) along the axial direction of upper disk (3) and lower disc (9), and between upper disk (3) and lower disc (9), being provided with the rotating disk by conductive material or permeability magnetic material made (4) parallel with upper disk (3), described rotating disk (4) is arranged on screw pair transmitting assemblies and with screw pair transmitting assemblies and rotates; Between described upper disk (3) and lower disc (9), be also provided with multipair magnet, the every pair of magnet comprises upper magnet (1) and is arranged on the lower magnet (15) of upper magnet (1) below along upper disk (3) axial direction, and the pole polarity that in described every pair of magnet, upper magnet (1) is relative with lower magnet (15) is contrary; Described rotary electric eddy current damping producer is also provided with two ends are connected and provide respectively magnetic conductive loop column (2) with upper disk (3), lower disc (9), and described upper magnet (1) and lower magnet (15) are all placed between column (2) and screw pair transmitting assemblies.
2. the axial eddy current damper based on screw drive mode according to claim 1, is characterized in that, described upper magnet (1), lower magnet (15) all and between column (2) leave space.
3. the axial eddy current damper based on screw drive mode according to claim 2, it is characterized in that, described upper magnet (1) is arranged on disk (3) bottom surface, and lower magnet (15) is arranged on lower disc (9) end face, and described rotating disk (4) is made up of conductive material.
4. the axial eddy current damper based on screw drive mode according to claim 3, it is characterized in that, the column (2) consistent with upper magnet (1) quantity is set, and column (2) is with corresponding upper magnet (1) in the radial alignment of upper disk (3), and upper magnet (1), lower magnet (15) all and between rotating disk (4) leave space.
5. the axial eddy current damper based on screw drive mode according to claim 2, it is characterized in that, described upper magnet (1) is arranged on the end face of rotating disk (4), and lower magnet (15) correspondence is arranged on the bottom surface of rotating disk (4), and in the bottom surface of upper disk (3), the upper interior disk (13) of being made up of conductive material is installed, the end face of lower disc (9) is installed the lower interior disk (14) of being made up of conductive material, and described rotating disk (4) is made up of permeability magnetic material.
6. according to the axial eddy current damper based on screw drive mode described in claim 3 or 5, it is characterized in that, described column (2) is the ring of sealing.
7. according to the axial eddy current damper based on screw drive mode described in claim 1 or 2, it is characterized in that, described screw pair transmitting assemblies comprise along upper disk (3) and lower disc (9) axial direction run through upper disk (3) and lower disc (9) and do axial motion screw rod (7), be arranged on screw rod (7) and go up and be placed in the nut (8) between upper disk (3) and lower disc (9), described rotating disk (4) is arranged on nut (8); The top of described screw rod (7) is provided with upper connecting rod (6), and described lower disc (9) bottom surface is provided with the lower support post (11) that covers on screw rod (7) bottom, and is provided with lower connecting rod (12) in lower support post (11) bottom.
8. the axial eddy current damper based on screw drive mode according to claim 7, is characterized in that, described nut (8) is connected with upper disk (3) by upper bearing (metal) (5), and described nut (8) passes through lower bearing (10) and is connected with lower disc (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420129007.9U CN203743282U (en) | 2014-03-21 | 2014-03-21 | Axial eddy-current retarder based on screw drive mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420129007.9U CN203743282U (en) | 2014-03-21 | 2014-03-21 | Axial eddy-current retarder based on screw drive mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743282U true CN203743282U (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420129007.9U Withdrawn - After Issue CN203743282U (en) | 2014-03-21 | 2014-03-21 | Axial eddy-current retarder based on screw drive mode |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821861A (en) * | 2014-03-21 | 2014-05-28 | 湖南大学 | Axial eddy current damper based on spiral transmission method |
| CN105402297A (en) * | 2014-08-14 | 2016-03-16 | 香港理工大学 | Magnetic negative stiffness damper |
| CN105953025A (en) * | 2016-05-04 | 2016-09-21 | 西南石油大学 | Receiving and anti-collision device for pig |
| CN107061599A (en) * | 2017-06-06 | 2017-08-18 | 广东电网有限责任公司电力科学研究院 | A kind of ball-type current vortex omnidirectional damping unit |
| CN109138207A (en) * | 2018-09-29 | 2019-01-04 | 山东大学 | A kind of electric regenerative eddy current damper |
-
2014
- 2014-03-21 CN CN201420129007.9U patent/CN203743282U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821861A (en) * | 2014-03-21 | 2014-05-28 | 湖南大学 | Axial eddy current damper based on spiral transmission method |
| CN103821861B (en) * | 2014-03-21 | 2015-05-20 | 湖南大学 | Axial eddy current damper based on spiral transmission method |
| WO2015139404A1 (en) * | 2014-03-21 | 2015-09-24 | 陈政清 | Axial eddy-current damping device based on helical transmission mode |
| CN105402297A (en) * | 2014-08-14 | 2016-03-16 | 香港理工大学 | Magnetic negative stiffness damper |
| CN105953025A (en) * | 2016-05-04 | 2016-09-21 | 西南石油大学 | Receiving and anti-collision device for pig |
| CN105953025B (en) * | 2016-05-04 | 2017-12-29 | 西南石油大学 | A kind of wiper receives anticollision device, collision-prevention device |
| CN107061599A (en) * | 2017-06-06 | 2017-08-18 | 广东电网有限责任公司电力科学研究院 | A kind of ball-type current vortex omnidirectional damping unit |
| CN109138207A (en) * | 2018-09-29 | 2019-01-04 | 山东大学 | A kind of electric regenerative eddy current damper |
| CN109138207B (en) * | 2018-09-29 | 2020-01-21 | 山东大学 | Energy recovery type eddy current damper |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140730 Effective date of abandoning: 20150520 |
|
| RGAV | Abandon patent right to avoid regrant |