CN110578297A - eddy current damper suitable for any vibration direction of inhaul cable - Google Patents
eddy current damper suitable for any vibration direction of inhaul cable Download PDFInfo
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- CN110578297A CN110578297A CN201910795137.3A CN201910795137A CN110578297A CN 110578297 A CN110578297 A CN 110578297A CN 201910795137 A CN201910795137 A CN 201910795137A CN 110578297 A CN110578297 A CN 110578297A
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- shell
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- bearing
- gear
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
the invention discloses an eddy current damper suitable for an inhaul cable in any vibration direction. The eddy current damper is composed of a stay cable 0, a rotor 1, a copper sheet 2, a torsion spring 3, a ring gear 4, a bearing structure 5 and connecting parts. The rotor comprises a housing 10, a housing collar 11, a screw 12, a magnet 13, and a magnet holder 14. The shell 10 comprises a baffle 15, an anti-rotation limiting strip 16, a shell limiting nail 17, a rear baffle 18 and a positioning groove 19; the copper sheet 2 is fixed on the positioning tube 20; the positioning ring is provided with a torque limiting nail 31; the torsion springs 3 arranged at the upper end and the lower end work cooperatively to ensure that the rotor returns to a balance position when the external vibration is finished; one end of the gear structure 4 is fixedly connected with the magnet 13, and the other end of the gear structure is fixedly connected with the copper sheet 2 to form a gear system. Each rotor is symmetrically provided with a ring gear system up and down; the bearing structure 5 comprises a bearing 50, and the bearing 50 comprises a positioning hole 51 and a positioning screw.
Description
the technical field is as follows:
The invention belongs to the field of structural vibration control, and particularly relates to an eddy current damper suitable for inhaul cable vibration in any vibration direction.
Technical background:
vibration control in the civil engineering field can be generally classified into active control and passive control according to the presence or absence of external energy input, and semi-active control and hybrid control formed by combining the two control modes. The common passive control methods are: basic vibration isolation, an energy consumption component vibration reduction system, an energy consumption device vibration reduction and a vibration absorber vibration reduction. The main control modes of the structure active control are as follows: active frequency modulation mass dampers, active anchor cable control, pulse control, aerodynamic wind shields, and the like.
the passive control is the structural control mode which is researched and used at the earliest, has the advantages of no need of external energy, simple technology and low manufacturing cost, and therefore, the passive control can be widely applied to engineering, such as viscous dampers, particularly oil liquid type dampers, and the main structures of the dampers comprise a cylinder body, viscous liquid, a piston rod, a damping material cavity, a sealing end sleeve, a sealing ring and other parts. The damper has high requirement on the tightness of instruments, has the problem of liquid leakage, and has influence on the reliability of the damper.
The invention discloses a vibration damper of an energy dissipater, belongs to the field of structural vibration control, and is used for inhibiting response under the action of structural vibration. The electromagnetic damper has the advantages that the leakage situation can not occur, the service life is longer, only the spring needs to be replaced during maintenance, the operation is simple, the maintenance cost is low, external power supply is not needed during use, and the concept of green development is met.
the invention content is as follows:
The purpose of the invention is as follows: in order to solve the problems, the invention provides an eddy current resistor suitable for any vibration direction of a stay cable. The energy-saving type energy-saving device has the characteristics of simple structure, environmental protection, obvious energy consumption, economic manufacturing cost and high practicability.
The technical scheme is as follows: in order to realize the purpose of the invention, the technical scheme adopted by the invention is as follows: a control system suitable for inhibiting the vibration of a structure in any direction is composed of a rotor 1, copper sheets 2, a torsion spring 3, a ring gear 4 and a bearing structure 5,
the rotor 1 comprises a first rotor 1-1 and a second rotor 1-2, the single rotor comprises a shell 10, an upper shell lantern ring 11, a lower shell lantern ring 11, a screw 12, a magnet 13 and a magnet fixer 14, and the shell 10 comprises a baffle 15, an anti-rotation limiting strip 16, a shell limiting nail 17, a rear baffle 18 and a positioning groove 19; each rotor is of a symmetrical structure and has a symmetrical plane;
Bearing structures 5 are respectively arranged in the upper end shell lantern rings 11 of the rotors 1-1 and 1-2 and are screwed and fixed through screws 12; moreover, the shells 10 of the two rotors comprise multilayer positioning grooves 19, the magnet holders 14 are clamped in the positioning grooves 19, and the magnets 13 are placed in the magnet holders 14 to form multilayer magnets;
The baffle 15 is screwed and fixed on the side surface of the shell through screws, the upper and lower positions of the baffle 15 are respectively provided with an anti-rotation limiting strip 16, and shell limiting nails 17 are welded on the upper surface of the top and the lower surface of the bottom of the shell 10;
The bearing structure 5 comprises a bearing 50, the bearing 50 comprises a positioning hole 51 and a positioning screw 52, the stay cable 0 sequentially penetrates through the bearing structures 5 in the rotors 1-1 and 1-2, the stay cable 0 and the bearing structure 5 are fixed by inserting the screw 52 into the positioning hole 51, and the positioning pipe 20 is sleeved at the middle part of the stay cable 0;
The zippers 0 above the bearing structures 5 in the rotors 1-1 and 1-2 are respectively sleeved with a torsion spring 3, and the position of the spring 3 is fixed through a spring positioning ring 30; the positioning ring 30 comprises a torque limiting nail 31 for limiting the torsion spring 3 and cooperates with the limiting nail 17 of the shell 10; the symmetrical surfaces of the two rotors are mutually vertical, when the stay cable (0) vibrates, the symmetrical surface of at least one rotor is not in the same plane with the vibration direction, and the rotors rotate by taking the stay cable (0) as an axis; when the shell limit nails 17 on the shell 10 of the first rotor (1-1) or the second rotor 1-2 rotate to be contacted with the extending parts at the two ends of the limit spring 3, the rotation of the shell can be blocked;
the torsion spring 3 limits the rotation of the rotor and ensures that the rotor returns to a balanced position when the external vibration is finished. The number of the springs 3 is two, the springs are symmetrically arranged one above the other, and the spring positioning rings 30 are arranged to limit the positions of the springs. As shown in fig. 8 and 9. The retaining ring 30 comprises a torque limiting pin 31 for limiting the spring, which cooperates with the housing stop pin 17, fig. 7.
When the inhaul cable 0 does not vibrate, the symmetry axes of the two rotors are mutually vertical, when the inhaul cable 0 vibrates, at least one rotor with the symmetry axis not collinear with the vibration direction can rotate with a centrifugal motion trend, at the moment, on one hand, the copper sheets 2 do cutting magnetic induction line motion relative to the magnets 13 to generate eddy currents and dissipate the energy of the vibration, on the other hand, the rotors always have a motion trend opposite to that of the inhaul cable 0 and can effectively restrict the amplitude of the inhaul cable 0, the installation schematic diagrams of the two rotors are shown in fig. 11, fig. 3 is the back of the shell, and fig. 4 is the front of the shell.
each layer of copper sheets 2 is positioned between two adjacent layers of magnets in the rotors 1-1 and 1-2, each layer of copper sheets 2 is fixed on the positioning tube 20 through a hole arranged in the middle of each layer of copper sheets 2, and each layer of copper sheets 2 can rotate around the positioning tube 20;
the gear structure 4 comprises a circular gear 40 and a ring gear 41, a round rod at one end of the circular gear 40 is welded and fixed with the magnet fixer 13, the ring gear 41 is fixed on the copper sheet 2, the circular gear 40 and the ring gear 41 are mutually contacted to form a gear system, the lower end of the stay cable 0 sequentially penetrates through the shell lantern rings 11 at the lower ends of the rotors 1-2 and 1-1, and the connection mode of the lower end part is consistent with that of the upper end part.
The circular gear 40 can rotate around a circular rod at one end thereof. The concrete effects are as follows:
as shown in fig. 14, when the magnet holder 13 rotates clockwise around the cable 0, the circular gear 40 is driven to rotate clockwise, and since the circular gear 40 and the ring gear 41 are in contact with each other, the ring gear 41 rotates counterclockwise and drives the copper sheet to rotate counterclockwise, so that the relative movement between the two is increased, the energy consumption and vibration reduction effects are increased, but when the magnet holder 13 rotates counterclockwise around the cable 0, the copper sheet is not driven to rotate.
The specific limiting principle is as follows: as shown in figure 11, when the shell 1-1 rotates clockwise, the stop pin 17 on the outer surface of the top of the shell contacts with the extension part at the lower end of the spring 3, which will drive the spring to rotate clockwise, and the torque-limiting pin 31 on the spring positioning ring 30 contacts with the extension part at the upper end of the spring 3, which plays a role in stopping the rotation of the spring.
The magnet arrangement mode is as follows: n poles are opposite to S poles between two vertical layers of adjacent magnets, N poles are opposite to S poles between annular adjacent magnets, N poles are the same as S poles between radial adjacent magnets, and the rotors 1-1 and 1-2 are identical in structure.
the magnet 13 is multilayer, and each layer adopts the array to arrange, and the concrete arrangement mode is: the N pole is opposite to the S pole between two vertical layers of adjacent magnets, the N pole is opposite to the S pole between the annular adjacent magnets, and the N pole is the same as the S pole between the radial adjacent magnets. Each layer of magnets 13 is mainly fixed by the positioning grooves 19 and the magnet holders 14 and then further fixed by the baffle plates 15, and the structure of the magnets is stable because the rotor only does centrifugal motion. Each layer of magnets is constructed as shown in fig. 12, and the magnet holder 14 is constructed as shown in fig. 13.
Has the advantages that: compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
(1) two rotors are vertically arranged, so that the vibration of the structure in any direction can be inhibited: when the structure vibrates in any direction, the rotor with at least one non-collinear symmetry axis and vibration direction can rotate relative to the copper sheet 2 under the action of external force to generate an eddy current in the copper sheet, so that the energy of the structure vibration is dissipated in a heat manner, and the effects of reducing vibration and energy consumption and inhibiting the structure vibration are achieved.
(2) The magnet is not only one layer, and each layer adopts the array to arrange, can strengthen the eddy current intensity in the copper sheet, increases damping power consumption effect: when vibration occurs, the copper sheet does cutting magnetic induction line movement, the magnetic field changes, and the two effects are superposed to obviously increase the strength of the eddy current in the copper sheet, so that the vibration reduction and energy consumption effects are improved.
(3) The magnet array arrangement is adopted, the influence of the current skin effect can be weakened, and the vibration reduction and energy consumption effects are increased: compared with the mode of adopting a whole block of magnet, the latter is only distributed on a certain part of the magnet due to the current skin effect, the material can not be fully utilized, and meanwhile, the effective resistance of the copper sheet is increased, and the vibration reduction and energy consumption effects of the damper are reduced. The magnet array arrangement can well relieve the adverse effect and improve the energy consumption effect of the damper.
(4) the ring gear structure is added between the copper sheet 2 and the magnet 13, so that the relative movement trend of the rotor and the copper sheet can be increased, larger induced current is generated in the copper sheet, and the energy consumption and vibration reduction effects of the damper are improved: one end of the annular gear 4 is fixedly connected with the magnet fixer 14, and the other end of the annular gear is fixedly connected with the copper sheet 2 to form a gear system, so that the relative motion trend of the rotor 1 and the copper sheet 2 can be increased when the structural inhaul cable 0 vibrates, and the effect of inhibiting the structural vibration is more remarkable. The gear structure can increase the relative movement trend of the rotor and the copper sheets, so that larger induced current is generated in the copper sheets, and the energy consumption and vibration reduction effects of the damper are improved.
(5) The electromagnetic damper is simple in structure, all parts are assembled, and large-scale production is facilitated; external power supply is not needed, and energy conservation and environmental protection are achieved; the structure amplitude can be reduced, the period is increased, the structure is safer, the damping effect can be adjusted as required, the number of the magnets of the damper is not changed, the dampers can be arranged as required, and the energy consumption and vibration reduction effects are obvious. The cost is very low, can be used to the control practicality of the arbitrary orientation vibration of structure high, and the use prospect is very good.
Description of the drawings:
FIG. 1 is a schematic view of a bearing mounted on a cable;
FIG. 2 is a schematic view of a bearing mounting and positioning tube;
FIG. 3 is a schematic view of the back of the housing;
FIG. 4 is a schematic front view of the housing;
FIG. 5 is a schematic view of a rotor;
FIG. 6 is a schematic view of the housing and bearing connection;
FIG. 7 is a schematic view of a torsion spring;
FIG. 8 is a schematic view of the relative positions of the housing, torsion spring and retaining ring;
FIG. 9 is a schematic view of the connection and fixation of a single rotor and copper sheet;
FIG. 10 is a schematic view of a copper sheet fixed on a positioning tube;
FIG. 11 is a schematic view of a complete damper installed on a cable;
FIG. 12 is a schematic view of magnet installation;
FIG. 13 is a schematic view of a magnet holder;
FIG. 14 is a schematic view of a gear configuration;
Wherein: 0-pull, 1-rotor, 1-1 first rotor, 1-2 second rotor, 2-copper sheet, 3-torsion spring, 4-gear structure, 5-bearing structure, 10-shell, 11-shell lantern ring, 12-screw, 13-magnet, 14-magnet fixer, 15-baffle, 16-anti-rotation spacing strip, 17-shell spacing nail, 18-rear baffle, 19-positioning groove, 20-positioning tube, 30-spring positioning ring, 31-torsion limiting nail, 40-circular gear, 41-ring gear, 50-bearing, 51-bearing positioning hole, 52-positioning screw.
The implementation mode is as follows:
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
the invention provides a control system suitable for inhibiting vibration of a structure in any direction, which consists of a rotor 1, a copper sheet 2, a torsion spring 3, a ring gear 4 and a bearing structure 5,
the rotor 1 comprises a first rotor 1-1 and a second rotor 1-2, the single rotor comprises a shell 10, an upper shell lantern ring 11, a lower shell lantern ring 11, a magnet 13 and a magnet fixer 14, and the shell 10 comprises a baffle 15, an anti-rotation limiting strip 16, a shell limiting nail 17, a rear baffle 18 and a positioning groove 19;
bearing structures 5 are respectively arranged in the upper end shell lantern rings 11 of the rotors 1-1 and 1-2 and are screwed and fixed through screws 12; moreover, the shells 10 of the two rotors comprise multilayer positioning grooves 19, the magnet holders 14 are clamped in the positioning grooves 19, and the magnets 13 are placed in the magnet holders 14 to form multilayer magnets;
The baffle 15 is screwed and fixed on the side surface of the shell through screws, the upper and lower positions of the baffle 15 are respectively provided with an anti-rotation limiting strip 16, and shell limiting nails 17 are welded on the upper surface of the top and the lower surface of the bottom of the shell 10;
the bearing structure 5 comprises a bearing 50, the bearing 50 comprises a positioning hole 51 and a positioning screw 52, the stay cable 0 sequentially penetrates through the bearing structures 5 in the rotors 1-1 and 1-2, the stay cable 0 and the bearing structure 5 are fixed by inserting the screw 52 into the positioning hole 51, and the positioning pipe 20 is sleeved at the middle part of the stay cable 0;
The zippers 0 above the bearing structures 5 in the rotors 1-1 and 1-2 are respectively sleeved with a torsion spring 3, and the position of the spring 3 is fixed through a spring positioning ring 30; the positioning ring 30 comprises a torque limiting nail 31 for limiting the torsion spring 3 and cooperates with the limiting nail 17 of the shell 10; when the inhaul cable 0 vibrates, at least one rotor with a symmetrical axis not collinear with the vibration direction rotates with the trend of centrifugal motion; when the shell limit nails 17 on the shell 10 of the first rotor (1-1) or the second rotor 1-2 rotate to be contacted with the extending parts at the two ends of the limit spring 3, the rotation of the shell can be blocked;
the torsion spring 3 limits the rotation of the rotor and ensures that the rotor returns to a balanced position when the external vibration is finished. The number of the springs 3 is two, the springs are symmetrically arranged one above the other, and the spring positioning rings 30 are arranged to limit the positions of the springs. As shown in fig. 8 and 9. The retaining ring 30 comprises a torque limiting pin 31 for limiting the spring, which cooperates with the housing stop pin 17, fig. 7.
When the inhaul cable 0 does not vibrate, the symmetry axes of the two rotors are mutually vertical, when the inhaul cable 0 vibrates, at least one rotor with the symmetry axis not collinear with the vibration direction can rotate with a centrifugal motion trend, at the moment, on one hand, the copper sheets 2 do cutting magnetic induction line motion relative to the magnets 13 to generate eddy currents and dissipate the energy of the vibration, on the other hand, the rotors always have a motion trend opposite to that of the inhaul cable 0 and can effectively restrict the amplitude of the inhaul cable 0, the installation schematic diagrams of the two rotors are shown in fig. 11, fig. 3 is the back of the shell, and fig. 4 is the front of the shell.
each layer of copper sheets 2 is positioned between two adjacent layers of magnets in the rotors 1-1 and 1-2, each layer of copper sheets 2 is fixed on the positioning tube 20 through a hole arranged in the middle of each layer of copper sheets 2, and each layer of copper sheets 2 can rotate around the positioning tube 20;
the gear structure 4 comprises a circular gear 40 and a ring gear 41, a round rod at one end of the circular gear 40 is welded and fixed with the magnet fixer 13, the ring gear 41 is fixed on the copper sheet 2, the circular gear 40 and the ring gear 41 are mutually contacted to form a gear system, the lower end of the stay cable 0 sequentially penetrates through the shell lantern rings 11 at the lower ends of the rotors 1-2 and 1-1, and the connection mode of the lower end part is consistent with that of the upper end part.
The circular gear 40 can rotate around a circular rod at one end thereof. The concrete effects are as follows:
As shown in fig. 14, when the magnet holder 13 rotates clockwise around the cable 0, the circular gear 40 is driven to rotate clockwise, and since the circular gear 40 and the ring gear 41 are in contact with each other, the ring gear 41 rotates counterclockwise and drives the copper sheet to rotate counterclockwise, so that the relative movement between the two is increased, the energy consumption and vibration reduction effects are increased, but when the magnet holder 13 rotates counterclockwise around the cable 0, the copper sheet is not driven to rotate.
The specific limiting principle is as follows: as shown in figure 11, when the shell 1-1 rotates clockwise, the stop pin 17 on the outer surface of the top of the shell contacts with the extension part at the lower end of the spring 3, which will drive the spring to rotate clockwise, and the torque-limiting pin 31 on the spring positioning ring 30 contacts with the extension part at the upper end of the spring 3, which plays a role in stopping the rotation of the spring. The magnet arrangement mode is as follows: n poles are opposite to S poles between two vertical layers of adjacent magnets, N poles are opposite to S poles between annular adjacent magnets, N poles are the same as S poles between radial adjacent magnets, and the rotors 1-1 and 1-2 are identical in structure.
the magnet 13 is multilayer, and each layer adopts the array to arrange, and the concrete arrangement mode is: the N pole is opposite to the S pole between two vertical layers of adjacent magnets, the N pole is opposite to the S pole between the annular adjacent magnets, and the N pole is the same as the S pole between the radial adjacent magnets. Each layer of magnets 13 is mainly fixed by the positioning grooves 19 and the magnet holders 14 and then further fixed by the baffle plates 15, and the structure of the magnets is stable because the rotor only does centrifugal motion. Each layer of magnets is constructed as shown in fig. 12, and the magnet holder 14 is constructed as shown in fig. 13.
the working principle is as follows:
when the stay cable 0 vibrates due to external force, the rotor is connected with the stay cable 0 through the bearing 5, and meanwhile, the rotor 1 is connected with the copper sheet 2 through the gear structure 4, so that the stay cable 0 does not translate together with the stay cable 0 but rotates by taking the stay cable 0 as a shaft, namely, the stay cable and the copper sheet have relative motion trends, and on one hand, due to the action of centrifugal force and the gear structure 4, the rotor per se can block the motion of the stay cable 0, so that the amplitude of the stay cable can be reduced; on the other hand, because the eddy current effect of copper sheet 2 and magnet 13 for magnet 13 further retrains the vibration of cable 0 through copper sheet 2, and simultaneously, because the viscidity effect of electric eddy current structure, make cable vibration cycle prolong, the energy of vibration also can be dissipated with the mode of heat energy through electric eddy current in addition.
in the process of single rotor rotational vibration, all the time, the single rotor is restrained by at least one torsion spring 3, when the shell rotates clockwise, the limiting nail 17 on the shell can apply external force to the torsion spring 3, and due to the existence of the limiting nail 17 on the spring limiting ring, the torsion spring 3 can not rotate and only can be subjected to torsional deformation, and finally, the shell 10 is pushed back to the reverse direction to return to the balance position, and the shell limiting nail 17 and the limiting nail 31 which are positioned below start to work in the same principle, so that the operation is repeated.
Particularly, because the single rotor of the damper has the most obvious effect of inhibiting the structural vibration in the direction vertical to the symmetrical axis of the single rotor, at least one rotor can play the roles of vibration reduction and energy consumption for the vibration in any direction of the structure by adopting the arrangement mode of the rotors with the two symmetrical axes vertical to each other. Therefore, the damper can be suitable for controlling vibration in any direction of the structure.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the spirit and scope of the invention.
Claims (4)
1. a control system suitable for inhibiting the vibration of a structure in any direction is characterized by comprising a rotor (1), a copper sheet (2), a torsion spring (3), a gear structure (4) and a bearing structure (5),
The rotor (1) comprises a first rotor (1-1) and a second rotor (1-2), each rotor comprises a shell (10), an upper shell lantern ring and a lower shell lantern ring (11), a magnet (13) and a magnet fixer (14), and the shell (10) comprises a baffle (15), an anti-rotation limiting strip (16), a shell limiting nail (17), a rear baffle (18) and a positioning groove (19);
bearing structures (5) are respectively arranged in the upper end shell lantern rings (11) of the first rotor (1-1) and the second rotor (1-2), and the bearing structures (5) are screwed and fixed through screws (12); the shells (10) of the two rotors comprise multilayer positioning grooves (19), the magnet holders (14) are clamped in the positioning grooves (19), and the magnets (13) are placed in the magnet holders (14) to form multilayer magnets;
the baffle (15) is screwed and fixed on the side face of the shell through screws, the upper position and the lower position of the baffle (15) are respectively provided with an anti-rotation limiting strip (16), and shell limiting nails (17) are welded on the upper surface of the top and the lower surface of the bottom of the shell (10);
the bearing structure (5) comprises a bearing (50), the stay cable (0) sequentially penetrates through the bearing structures (5) in the rotors (1-1) and (1-2) to fix the stay cable 0 and the bearing structures (5), and the positioning pipe (20) is sleeved in the middle of the stay cable (0);
the zippers (0) above the bearing structures (5) in the rotors (1-1) and (1-2) are respectively sleeved with a torsion spring (3), and the springs (3) are fixed on the zippers (0) through spring positioning rings (30); the positioning ring (30) comprises a torque limiting nail (31) for limiting the torsion spring (3) and cooperates with a limiting nail (17) of the shell (10); when the shell limit nails (17) on the shell (10) of the first rotor (1-1) and/or the second rotor (1-2) rotate to be contacted with the extending parts at the two ends of the limit spring (3), the rotation of the shell (10) can be hindered;
each layer of copper sheets (2) is positioned between two adjacent layers of magnets in the rotors (1-1) and (1-2), each layer of copper sheets (2) is fixed on the positioning pipe (20) through a hole arranged in the middle of each layer of copper sheets, and each layer of copper sheets (2) can rotate around the positioning pipe (20);
the gear structure (4) comprises a circular gear (40) and a ring gear (41), a round rod at one end of the circular gear (40) is welded and fixed with the magnet fixer (13), the ring gear (41) is fixed on the copper sheet (2), the circular gear (40) and the ring gear (41) are contacted with each other to form a gear system, the lower end of the inhaul cable (0) sequentially penetrates through the shell lantern rings (11) at the lower ends of the rotors (1-2) and (1-1), and the connection mode of the lower end part is completely consistent with that of the upper end part.
2. a control system adapted to suppress vibration of a structure in any direction as defined in claim 1, wherein the magnets are arranged in a manner such that: the N pole is opposite to the S pole between two vertical layers of adjacent magnets, the N pole is opposite to the S pole between the annular adjacent magnets, and the N pole is the same as the S pole between the radial adjacent magnets.
3. A control system adapted to damp vibrations of a structure in any direction according to claim 1 or 2, characterised in that the first rotor (1-1) and the second rotor (1-2) are of the same construction.
4. a control system adapted to damp vibrations in any direction of a structure according to claim 1 or 2, characterised in that the bearing (50) comprises a positioning hole (51) and a positioning screw (52), and the cable (0) and the bearing structure (5) are fixed by inserting the screw (52) into the positioning hole (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910795137.3A CN110578297A (en) | 2019-08-27 | 2019-08-27 | eddy current damper suitable for any vibration direction of inhaul cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910795137.3A CN110578297A (en) | 2019-08-27 | 2019-08-27 | eddy current damper suitable for any vibration direction of inhaul cable |
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| CN110578297A true CN110578297A (en) | 2019-12-17 |
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| CN112878177A (en) * | 2021-02-03 | 2021-06-01 | 大连交通大学 | Sleeve type vibration control device for suspension cable of suspension bridge |
| WO2021253169A1 (en) * | 2020-06-15 | 2021-12-23 | 大连理工大学 | Non-linear dynamic vibration absorber having double-ringed strong magnet arrays for suspender vibration damping, and design method |
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