CN103821861B - Axial eddy current damper based on spiral transmission method - Google Patents
Axial eddy current damper based on spiral transmission method Download PDFInfo
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- CN103821861B CN103821861B CN201410106148.3A CN201410106148A CN103821861B CN 103821861 B CN103821861 B CN 103821861B CN 201410106148 A CN201410106148 A CN 201410106148A CN 103821861 B CN103821861 B CN 103821861B
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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
- 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
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- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention relates to a large axial eddy current damper manufactured through a spiral transmission method. The axial eddy current damper based on the spiral transmission method comprises a spiral pair transmission assembly and a rotary eddy current damping generator. The rotary eddy current damping generator comprises an upper disc and a lower disc which are consistent in size, are vertically parallel and are made of magneto-conductive materials, wherein a rotary disc which is parallel with the upper disc and is made of electricity-conductive materials or magneto-conductive materials is arranged between the upper disc and the lower disc, the rotary disc is installed on the spiral pair transmission assembly and rotates along with the spiral pair transmission assembly, a plurality of pairs of magnets are further arranged between the upper disc and the lower disc, and the opposite magnetic poles of an upper magnet and a lower magnet of each pair of magnets are opposite in polarity. According to the axial eddy current damper based on the spiral transmission method, axial movement of a controlled structure is converted into the rotary movement of an inner structure of the damper to be controlled through a spiral pair, the control efficiency is largely improved, and the ratio between the damping force of the axial eddy current damper and the self weight is improved to the level equal to that of a viscous fluid damper or higher level.
Description
Technical field
The present invention relates to a kind of large-scale axial eddy current damper utilizing screw drive mode to make, be specially adapted to frequency of okperation low and require that damping constant is large, the passive and semi-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: can produce electric convolution in conductor plate when being in the conductor plate cutting magnetic line in magnetic field, electric convolution can produce again the new magnetic field contrary with magnetic field, thus formed between former magnetic field and conductor hinder both the damping force of relative movement, the kinetic energy of conductor plate is converted to thermal dissipation by electric convolution and goes out by the electricresistance effect of conductor plate simultaneously.If conductor plate is connected with vibrational structure, just can produces the effect of structural vibration reduction and power consumption, become eddy current damper.Compared with some damping devices that field of vibration control is conventional, eddy current damper does not rely on mechanical friction to consume energy, there is no the problem of working fluid yet just not leakage and sealing, 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 fatigue life long and working environment that is not easy care.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, and possess identical damping constant and compare with the Effects of Viscous Fluid Damper of maximum damping force, adopt the eddy current damper of same movement mode often heavily a lot, much larger.Calculating shows, the axial eddy current damper that one produces 10kN damping force under the speed of one centimetre per second is made by directly adopting axial relative movement mode between magnet and conductor, its weight one to two orders of magnitude higher than Effects of Viscous Fluid Damper, without use value.Therefore improve the damping force of eddy current damper and own wt ratio, the eddy current damper producing large damping constant is in field of civil engineering promotion and application eddy-current damping technology key issue urgently to be resolved hurrily.The published axial eddy current damper patent of invention of current China mainly from prevent leakage field and optimize magnetic Circuit Design approach go to improve the performance of damper, to improving the limited use of damping force with own wt ratio.
Summary of the invention
The object of the invention is to, 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 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, structure simple and durable.
Technological scheme of the present invention is, a kind of axial eddy current damper based on screw drive mode, and comprise transmitting assemblies, rotary electric eddy current damping producer, described transmitting assemblies is screw pair transmitting assemblies; Described rotary electric eddy current damping producer comprises in the same size and by the upper disk be made up of permeability magnetic material be arranged in parallel up and down and lower disc, described screw pair transmitting assemblies runs through upper disk and lower disc along the axial direction of upper disk and lower disc, and upper disk be provided with the rotating disk of conductive material or permeability magnetic material be made up parallel with upper disk between lower disc, described rotating disk to be arranged on screw pair transmitting assemblies and to rotate with screw pair transmitting assemblies; Also be provided with multipair magnet between described upper disk and lower disc, often pair of magnet comprises upper magnet and is arranged on the lower magnet below upper magnet along upper disk axial direction, and the pole polarity that in described often 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 and is connected with upper disk, lower disc respectively and provides the column of magnetic conductive loop, 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 technical solution adopted in the present invention comprises the fixed scheme of magnet and the rotary scheme of magnet two kinds.
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 and corresponding upper magnet are in the radial alignment of upper disk; Column can also be arranged to the ring closed; Upper magnet, lower magnet all and between rotating disk leave space.Above two kinds of column set-up modes all can realize the shortest object with preventing leakage field of magnetic circuit.When the column consistent with upper magnet quantity is wherein set, damper structure weight can be alleviated; And when arranging ring column, ring column and upper lower disc can form a firm cavity closed, protection internal structure, and can thoroughly eliminate leakage field phenomenon.
Cut the magnetic line of force of magnet when rotating disk rotates, in rotating disk, produce electric convolution immediately, produce the damping force hindering rotating disk to rotate simultaneously.Often pair of magnet produces a high magnetic fields perpendicular through rotating disk, and rotating disk should keep the distance of 2 to 3mm with upper lower magnet; Magnet layout is along the circumferential direction according to the shortest principle arrangement of magnetic circuit.
Magnet generally uses permanent magnet, as required king-sized magnetic intensity or carrying out semi-active control, then 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 material that magnetic property is good, such as 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 the upper interior disk be made up of conductive material is installed in the bottom surface of upper disk, the end face of lower disc installs the lower interior disk be made up of conductive material, and described rotating disk is permeability magnetic material.When rotating disk drives upper and lower magnet to rotate together, the magnetic field formed between upper and lower magnet also can rotate thereupon together, so upper interior disk and lower interior disk meeting cutting magnetic line, produces eddy current effect.Column design must be closed ring by rotary magnet type scheme, and the closed cavity cylindrical body 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 comprises and runs through upper disk and lower disc along upper disk and lower disc axial direction and make the screw rod of axial motion, be arranged on screw rod and be placed in the nut between upper disk and lower disc, and 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 covering 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, the transmitting assemblies that described screw pair transmitting assemblies can be slip screw transmitting assemblies, rolling spiral drive assembly, static pressure power screw assembly and other all screw pair structure are formed.
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 invention is described as follows:
After being connected 2 of the upper and lower connecting rod of described damper and the Relative Vibration of controlled structures, 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 the rotary motion of rotating disk into.The magnetic field that between every about a pair magnet of fixed magnets formula scheme, formation one is stable, the rotating disk circumgyration incision magnetic line of force of conductive material, produces eddy current effect; When adopting rotary magnet type embodiment, the magnetic field formed between often pair of magnet rotates with rotating disk, so the upper interior disk of electric conductor and lower interior disk cutting magnetic line, produces 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, so damper obtains very large damping constant through screw pair.If the eddy-current damping coefficient at often pair of magnet place is C
e, can prove, when disregarding frictional force, the equivalent axis of described damper to damping constant C is
In formula
nfor magnet pairs,
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
chundreds and thousands of times singly to magnet place damping constant can be reached.The model machine of trial-production has confirmed this feature.
It is low and require the vibration control of the large scale civil engineering structure of very large damping constant that the present invention is specially adapted to frequency of okperation, except possessing eddy current damper structure simple and durable, hardly with outside the intrinsic advantages such as maintenance, it is compared with existing Effects of Viscous Fluid Damper technology and has the following advantages:
1) described damper is controlled by screw pair the rotary motion that the axial motion of controlled structures is converted into damper internal structure, achieve the significantly raising of control efficiency, the damping force of axial eddy current damper with own wt than the peer-level bringing up to Effects of Viscous Fluid Damper or higher level.
2) described damper only needs to increase the working stroke that spiro rod length just can increase damper, and the cost increased because increasing stroke is little.And Effects of Viscous Fluid Damper must increase piston rod length and length of oil cylinder could increase damper working stroke simultaneously, this makes Long Distances Effects of Viscous Fluid Damper expensive especially.
3) described damper can increase the damping constant of damper by the quantity of the three kinds of modes such as diameter, increase magnets magnetic fields intensity, increase magnet pairs amount and increase electric convolution producer that increase rotating disk, is applicable to manufacturing large, medium and small all types of damper.
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 semi-active control, compared with MR damper, the simple cost of structure is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the layout schematic diagram of upper magnet on upper disk in the embodiment of the present invention 1;
Fig. 3 is the layout schematic diagram of lower magnet on lower disc in the embodiment of the present invention 1;
Fig. 4 is the structural representation of the embodiment of the present invention 2;
Fig. 5 be in the embodiment of the present invention 2 upper magnet at the layout schematic diagram of rotating disk end face;
Fig. 6 be in the embodiment of the present invention 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, described rotary electric eddy current damping producer comprises in the same size and by the upper disk 3 be made up of permeability magnetic material be arranged in parallel up and down and lower disc 9, 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 upper disk 3 be provided with the rotating disk 4 of conductive material be made up parallel with upper disk 3 between lower disc 9, described rotating disk 4 to be arranged on screw pair transmitting assemblies and to rotate with screw pair transmitting assemblies, also be provided with 8 pairs of magnets between described upper disk 3 and lower disc 9, often pair of magnet comprises upper magnet 1 and is arranged on the lower magnet 15 below upper magnet 1 along upper disk 3 axial direction, and the pole polarity that in described often 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 and is connected with upper disk 3, lower disc 9 respectively and provides the column 2 of magnetic conductive loop, 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 leave space.
Screw pair transmitting assemblies comprises and runs through upper disk 3 and lower disc 9 along upper disk 3 and lower disc 9 axial direction and make the screw rod 7 of axial motion, be arranged on screw rod 7 and be placed in the nut 8 between upper disk 3 and lower disc 9, and 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 covering on screw rod 7 bottom, and is provided with lower connecting rod 12 bottom lower support post 11.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 surface, and lower magnet 15 is arranged on lower disc 9 end face.8 columns 2 are set, and column 2 and corresponding upper magnet 1 are 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, described rotary electric eddy current damping producer comprises in the same size and by the upper disk 3 be made up of permeability magnetic material be arranged in parallel up and down and lower disc 9, 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 upper disk 3 be provided with the rotating disk 4 of permeability magnetic material be made up parallel with upper disk 3 between lower disc 9, described rotating disk 4 to be arranged on screw pair transmitting assemblies and to rotate with screw pair transmitting assemblies, also be provided with 8 pairs of magnets between described upper disk 3 and lower disc 9, often pair of magnet comprises upper magnet 1 and is arranged on the lower magnet 15 below upper magnet 1 along upper disk 3 axial direction, and the pole polarity that in described often 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 and is connected with upper disk 3, lower disc 9 respectively and provides the column 2 of magnetic conductive loop, 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 comprises and runs through upper disk 3 and lower disc 9 along upper disk 3 and lower disc 9 axial direction and make the screw rod 7 of axial motion, be arranged on screw rod 7 and be placed in the nut 8 between upper disk 3 and lower disc 9, and 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 covering on screw rod 7 bottom, and is provided with lower connecting rod 12 bottom lower support post 11.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 correspondence is arranged on the bottom surface of rotating disk 4, and install the upper interior disk 13 be made up of conductive material in the bottom surface of upper disk 3, the end face of lower disc 9 installs the lower interior disk 14 be made up of conductive material.Column 2 is the ring closed.
Conductive material is electrician's red copper, and permeability magnetic material is electrician's soft iron.
Claims (8)
1., based on an axial eddy current damper for screw drive mode, comprise transmitting assemblies and rotary electric eddy current damping producer, it is characterized in that, described transmitting assemblies is screw pair transmitting assemblies; Described rotary electric eddy current damping producer comprises in the same size and by the upper disk (3) be made up of permeability magnetic material be arranged in parallel up and down and lower disc (9), 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) with lower disc (9), being provided with the rotating disk (4) of conductive material or permeability magnetic material be made up parallel with upper disk (3), described rotating disk (4) to be arranged on screw pair transmitting assemblies and to rotate with screw pair transmitting assemblies; Multipair magnet is also provided with between described upper disk (3) and lower disc (9), often 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 often 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 and is connected with upper disk (3), lower disc (9) respectively and the column (2) providing magnetic conductive loop, and described upper magnet (1) and lower magnet (15) are all placed between column (2) and screw pair transmitting assemblies.
2. according to claim 1 based on the axial eddy current damper of screw drive mode, it is characterized in that, described upper magnet (1), lower magnet (15) all and between column (2) leave space.
3. according to claim 2 based on the axial eddy current damper of screw drive mode, 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. according to claim 3 based on the axial eddy current damper of screw drive mode, it is characterized in that, the column (2) consistent with upper magnet (1) quantity is set, and column (2) and corresponding upper magnet (1) are in the radial alignment of upper disk (3), and upper magnet (1), lower magnet (15) all and between rotating disk (4) leave space.
5. according to claim 2 based on the axial eddy current damper of screw drive mode, 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 the upper interior disk (13) be made up of conductive material is installed in the bottom surface of upper disk (3), the end face of lower disc (9) installs the lower interior disk (14) be made up of conductive material, and described rotating disk (4) is made up of permeability magnetic material.
6. according to claim 3 or 5 based on the axial eddy current damper of screw drive mode, it is characterized in that, described column (2) be close ring.
7. according to claim 1 or 2 based on the axial eddy current damper of screw drive mode, it is characterized in that, described screw pair transmitting assemblies comprises and runs through upper disk (3) and lower disc (9) along upper disk (3) and lower disc (9) axial direction and make the screw rod (7) of axial motion, be arranged on screw rod (7) and go up and be placed in the nut (8) between upper disk (3) and lower disc (9), and 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) covering on screw rod (7) bottom, and is provided with lower connecting rod (12) in lower support post (11) bottom.
8. according to claim 7 based on the axial eddy current damper of screw drive mode, it is characterized in that, described 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).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410106148.3A CN103821861B (en) | 2014-03-21 | 2014-03-21 | Axial eddy current damper based on spiral transmission method |
| PCT/CN2014/083317 WO2015139404A1 (en) | 2014-03-21 | 2014-07-30 | Axial eddy-current damping device based on helical transmission mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410106148.3A CN103821861B (en) | 2014-03-21 | 2014-03-21 | Axial eddy current damper based on spiral transmission method |
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| CN103821861A CN103821861A (en) | 2014-05-28 |
| CN103821861B true CN103821861B (en) | 2015-05-20 |
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| WO (1) | WO2015139404A1 (en) |
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| CN103233997A (en) * | 2013-05-23 | 2013-08-07 | 湖南大学 | Double-layer circular-tube type axial-force eddy current damper |
| CN203743282U (en) * | 2014-03-21 | 2014-07-30 | 湖南大学 | Axial eddy-current retarder based on screw drive mode |
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| CN203308994U (en) * | 2013-05-23 | 2013-11-27 | 湖南大学 | Double-layer circular tube type axial force eddy current damper |
| CN103821961A (en) * | 2013-12-26 | 2014-05-28 | 方正阀门集团有限公司 | Ball valve |
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| CN102797786A (en) * | 2012-08-16 | 2012-11-28 | 北京航空航天大学 | Array-type novel high-performance eddy current damper |
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| CN103233997A (en) * | 2013-05-23 | 2013-08-07 | 湖南大学 | Double-layer circular-tube type axial-force eddy current damper |
| CN203743282U (en) * | 2014-03-21 | 2014-07-30 | 湖南大学 | Axial eddy-current retarder based on screw drive mode |
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| US9878193B2 (en) | 2015-12-09 | 2018-01-30 | Singularity Ltd. | Linear displacement damper structure |
Also Published As
| Publication number | Publication date |
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| WO2015139404A1 (en) | 2015-09-24 |
| CN103821861A (en) | 2014-05-28 |
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