External rotation type intelligent eddy current damper

Abstract

The utility model discloses an external rotation type intelligent eddy current damper, and belongs to the technical field of energy dissipation and vibration reduction control. The eddy current damper solves the problems that the damping coefficient of an existing eddy current damper cannot be conveniently adjusted, the utilization rate of a magnetic field is not high, and the damping force cannot be adjusted in real time according to structural vibration signals. The excitation winding is wound around the periphery of the iron core, the permanent magnet is fixedly connected to one end of the iron core, the other end of the iron core is fixedly connected to the connecting pipe, the conductor cylinder is rotationally connected to the periphery of the connecting pipe, the ball screw is connected to the top end of the connecting pipe, a screw of the ball screw is inserted into the connecting pipe, the flange plate is connected to the lead screw nut, and the upper end of the sleeve is fixedly connected with the flange plate. The lower end of the sleeve is fixedly connected with the conductor cylinder, and the intelligent control module is electrically connected with the excitation winding. Structural vibration signals are captured through the intelligent control module to change the magnitude and direction of current input into the excitation winding in real time, then damping force is adjusted in real time, the magnetic field utilization rate is increased, and structural vibration is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to an outer rotation type intelligent eddy current damper belongs to energy dissipation and vibration control technical field. BACKGROUND

[0002] Eddy current damping technology is a technology using the interaction of magnetic field and induced magnetic field, aiming at producing damping effect. When the magnetic flux through the conductor changes, induced electromotive force will appear in the conductor, and then induced eddy current will be generated. Eddy current will make the conductor subject to Ampere force, which macroscopically appears as the force hindering the original movement of the conductor, i.e. eddy current damping force. According to the law of conservation of energy, the kinetic energy consumed by the conductor will be converted into heat energy and finally dissipated.

[0003] Compared with some common dampers in the field of energy dissipation and vibration control of structural vibration, the eddy current damper does not have the problems of liquid leakage and sealing, and has the advantages of high energy dissipation density, high reliability and good durability.

[0004] Currently, the research and application of the outer rotation type eddy current damper in the field of civil engineering mainly focus on passive control. The outer rotation type eddy current damper capable of achieving intelligent control effect still needs to be further explored and mined in terms of structural design, damping force model, dynamic characteristics, fatigue performance, control algorithm and vibration control effect. Furthermore, the eddy current damper currently used in the field of civil engineering cannot conveniently adjust the size of the damping coefficient, the utilization rate of the magnetic field is not high, and the damping force cannot be adjusted in real time according to the structural vibration signal. UTILITY MODEL CONTENTS

[0005] The utility model is to solve the above-mentioned technical problem, and further provides an outer rotation type intelligent eddy current damper.

[0006] The utility model adopts the technical scheme that:

[0007] An outer rotation type intelligent eddy current damper, comprising a connecting pipe, a transmission assembly, a conductor cylinder, a plurality of damping assemblies and an intelligent control module, the plurality of damping assemblies are circumferentially distributed on the outer wall of the connecting pipe, each damping assembly comprises an iron core, an excitation winding and a permanent magnet, the excitation winding is wound on the circumferential side of the iron core, the permanent magnet is fixedly connected to one end of the iron core, the other end of the iron core is fixedly connected to the connecting pipe, the conductor cylinder is rotationally connected to the circumferential side of the connecting pipe, the transmission assembly comprises a ball screw, a flange plate and a sleeve, the ball screw is connected to the top end of the connecting pipe, the screw rod of the ball screw is inserted into the connecting pipe, the flange plate is connected to the screw nut, the upper end of the sleeve is fixedly connected to the flange plate, and the lower end of the sleeve is fixedly connected to the conductor cylinder, the intelligent control module comprises an acceleration sensor, a microprocessor and a current regulator, the acceleration sensor, the microprocessor and the current regulator are electrically connected, and the current regulator is electrically connected to the excitation winding.

[0008] Further, the cross section of the iron core is wedge-shaped, and the end close to the permanent magnet is tooth-shaped.

[0009] Further, the outer surface of the connecting pipe is provided with a first annular protrusion and a second annular protrusion, and the upper part and the lower part of the conductor cylinder are rotatably connected with the second annular protrusion and the first annular protrusion through a plurality of rotating bearings respectively.

[0010] Further, a wire reservation opening is arranged on the first annular protrusion.

[0011] Further, the ball screw is connected with the top end of the connecting pipe through a plurality of thrust bearings.

[0012] Further, the electric connection is all direct current power supply electric connection.

[0013] Further, a gap is left between the permanent magnet and the conductor cylinder, and the gap ranges from 1mm to 5mm.

[0014] Further, the permanent magnets of the plurality of damping components are arranged alternately in N-pole and S-pole along the circumference of the connecting pipe.

[0015] Further, the screw rod top end of the ball screw is fixedly connected with an upper connecting end, and the bottom end of the connecting pipe is fixedly connected with a lower connecting end.

[0016] Further, the connecting pipe, the iron core and the sleeve are all made of high magnetic permeability material, and the conductor cylinder is made of high electrical conductivity material.

[0017] Compared with the prior art, the utility model has the following effects:

[0018] The utility model discloses an outer rotation type intelligent eddy current damper, and the size and direction of exciting current input are changed in real time according to structure vibration signals through intelligent control module, and then damping force is adjusted in real time, vibration of the structure is effectively reduced, when the damping force does not need to be adjusted, the intelligent control module does not pass current to the excitation winding, the normal use of the damper is guaranteed, and energy can also be effectively saved, when the damping force needs to be adjusted, the size and direction of the current in the excitation winding are changed in real time through the intelligent control module to capture structure vibration signals, and then the damping force is adjusted in real time, the magnetic field utilization rate is improved, only a little external energy input can realize the effect close to active control, and vibration of the structure is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings forming part of the present utility model serve to provide further understanding of the present utility model, and the illustrative embodiments of the present utility model and the description thereof serve to explain the present utility model and do not constitute undue limitation on the present utility model. In the drawings:

[0020] Figure 1 A schematic diagram of an externally rotating intelligent eddy current damper;

[0021] Figure 2 for Figure 1 Sectional view along the AA direction;

[0022] Figure 3 This is a schematic diagram of the magnetic flux flow direction of adjacent magnetic poles in an externally rotating intelligent eddy current damper under positive excitation current conditions.

[0023] Figure 4 The front view of the core in an externally rotating intelligent eddy current damper;

[0024] Figure 5 This is a side view of the core in an externally rotating intelligent eddy current damper.

[0025] Figure 6 This is a top view of the iron core in an externally rotating intelligent eddy current damper.

[0026] Figure 7 This is a schematic diagram of the intelligent control module in an externally rotating intelligent eddy current damper.

[0027] In the diagram: 1. Upper connecting end; 2. Ball screw; 3. Screw nut; 4. Thrust bearing; 5. Permanent magnet; 6. Excitation winding; 7. Iron core; 8. Flange; 9. Sleeve; 10. Conductor cylinder; 11. Rotary bearing; 12. Connecting pipe; 12-1. First annular protrusion; 12-2. Second annular protrusion; 13. Lower connecting end. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] See appendix Figures 1-7The utility model discloses an outer rotation type intelligent eddy current damper, including connecting pipe 12, transmission assembly, conductor cylinder 10, a plurality of damping components and intelligent control module, a plurality of damping components are evenly distributed on the outer wall of connecting pipe 12, and each damping component includes iron core 7, excitation winding 6 and permanent magnet 5, excitation winding 6 is wound on the lateral side of iron core 7, permanent magnet 5 is fixedly connected on one end of iron core 7, the other end of iron core 7 is fixedly connected on connecting pipe 12, and conductor cylinder 10 is rotationally connected on the lateral side of connecting pipe 12, the transmission assembly includes ball screw 2, flange plate 8 and sleeve 9, ball screw 2 is connected on the top end of connecting pipe 12, and the screw rod of ball screw 2 is inserted in connecting pipe 12, the flange plate 8 is connected on screw nut 3, the upper end of sleeve 9 is fixedly connected with flange plate 8, and the lower end of sleeve 9 is fixedly connected with conductor cylinder 10, and the intelligent control module includes acceleration sensor, microprocessor and current regulator, the acceleration sensor, microprocessor and current regulator are electrically connected, and the current regulator is electrically connected with excitation winding 6.

[0031] The utility model provides an outer rotation type intelligent eddy current damper, and the size and direction of excitation current input are changed in real time according to structural vibration signals through intelligent control module, and then the damping force is adjusted in real time, the vibration of structure is effectively reduced, when the damping force does not need to be adjusted, the current is not inputted to excitation winding 6 through intelligent control module, makes the outer rotation type intelligent eddy current damper keep fixed damping force to resist structural vibration, guarantees the normal use of damper, and energy can be effectively saved simultaneously, when the damping force needs to be adjusted, the size and direction of the current in excitation winding 6 are changed in real time through intelligent control module to capture structural vibration signals, and then the damping force is adjusted in real time, the utilization of magnetic field is improved, and the effect close to active control can be realized only by less external energy input, and the vibration of structure is effectively reduced.

[0032] The cross section of iron core 7 is wedge-shaped, and the end close to permanent magnet 5 is toothed structure, specifically, permanent magnet 5 is fixedly connected on the toothed structure of iron core 7, the stability of the connection between permanent magnet 5 and iron core 7 can be ensured through the toothed structure of iron core 7, and excitation winding and permanent magnet form series magnetic circuit on the iron core, the magnetic induction lines generated by permanent magnet pass through conductor cylinder 10 vertically, and then cut the magnetic induction lines when conductor cylinder 10 rotates with sleeve 9, and then generate damping force.

[0033] The outer surface of the connecting pipe 12 is provided with a first annular protrusion 12-1 and a second annular protrusion 12-2, and the upper and lower parts of the conductor cylinder 10 are respectively rotatably connected with the second annular protrusion 12-2 and the first annular protrusion 12-1 through a plurality of rotating bearings. The first annular protrusion 12-1 and the second annular protrusion 12-2 provide mounting positions for the rotating bearing 11, and the conductor cylinder 10 is connected with the connecting pipe 12 through the rotating bearing 11, so that when the ball screw 2 drives the sleeve 9 to rotate, the conductor cylinder 10 rotates synchronously with the sleeve 9, and then relative motion is generated between the conductor cylinder 10 and the permanent magnet 5, and then a damping force is generated.

[0034] The first annular protrusion 12-1 is provided with a wire reservation opening. The wire reservation opening facilitates the electrical connection between the current regulator and the excitation winding 6, and then the intelligent control module controls the size and direction of the current flowing into the excitation winding 6, and then the intelligent adjustment of the damping force is realized.

[0035] The ball screw 2 is connected with the top end of the connecting pipe 12 through a plurality of thrust bearings 4.

[0036] The electrical connection is a direct current power supply connection. The direct current power supply is convenient to adjust the size and direction. Specifically, when the excitation winding 6 is connected with positive direct current, the direction of the magnetic field generated by the excitation winding 6 is consistent with the magnetization direction of the permanent magnet 5, at this time, the permanent magnet 5 and the excitation winding 6 work together, which can obviously improve the gap magnetic field strength, thereby improving the output of the damping force; when the excitation winding 6 is connected with reverse direct current, the magnetic field generated by the excitation winding 6 is opposite to the direction of the magnetic field of the permanent magnet 5, thereby playing a role in inhibiting the gap magnetic field strength, which can effectively reduce the output of the damping force; when the current changes between positive and negative, the damping force generated by the conductor cylinder 10 will also change, thereby realizing the effect of controlling the damping force output by adjusting the direction and size of the direct current; the damping force output by the direct current power supply has a larger adjustment range, which can effectively reduce structural vibration.

[0037] The permanent magnet 5 and the conductor cylinder 10 are left with a gap, and the gap range is 1mm-5mm. The gap of 1mm-5mm between the permanent magnet 5 and the conductor cylinder 10 can effectively ensure the magnetic field strength and reduce the magnetic leakage phenomenon. The gap between the permanent magnet 5 and the conductor cylinder 10 forms a gap magnetic field, and when the conductor cylinder 10 rotates, the electric eddy current is generated by cutting the magnetic induction lines in the gap magnetic field, and the ampere force acting on the conductor cylinder 10 is expressed as a damping force that hinders the rotation of the conductor cylinder 10.

[0038] The permanent magnets 5 of the plurality of damping assemblies are alternately arranged with N-poles and S-poles along the circumferential side of the connecting pipe 12. The alternately arranged N-poles and S-poles of the permanent magnets 5 can improve the magnetic field strength, increase the damping force adjustment range, and improve the magnetic field utilization rate.

[0039] The screw rod top end of the ball screw 2 is fixed with the upper connecting end 1, and the bottom end of the connecting pipe 12 is fixed with the lower connecting end 13. The upper connecting end 1 and the lower connecting end 13 are connected with the structure generating vibration, the vibration of the structure drives the ball screw 2 to move linearly, and then drives the conductor cylinder 10 to rotate around the central axis of the screw rod to cut the magnetic induction lines of the gap magnetic field, and then generates the electric eddy current in the conductor cylinder 10, and the ampere force suffered by the conductor cylinder 10 is shown as the damping force hindering the rotation of the conductor cylinder 10. The lower connecting end 13 is the fixed end of the outer-rotating type intelligent electric eddy current damper.

[0040] The connecting pipe 12, the iron core 7 and the sleeve 9 are made of high magnetic permeability material, and the conductor cylinder 10 is made of high electrical conductivity material. Preferably, the high magnetic permeability material is electrical soft iron. The magnetic conductivity of the electrical soft iron is better, and the leakage magnetic phenomenon is effectively reduced.

[0041] The outer-rotating type intelligent electric eddy current damper has the following working principle: when the structure does not generate vibration, the connecting ends at both ends of the intelligent electric eddy current damper are in the initial static position, the conductor cylinder 10 and the permanent magnet 5 remain in the static state, and no damping force is generated; when the structure generates vibration to drive the screw rod of the ball screw 2 to move linearly, and then drives the conductor cylinder 10 to rotate around the central axis of the screw rod to cut the magnetic induction lines of the gap magnetic field, and then generates the electric eddy current in the conductor cylinder 10, the electric eddy current makes the ampere force suffered by the conductor cylinder 10 shown as the damping force hindering the rotation of the conductor cylinder 10, at the same time, the acceleration sensor collects the structure vibration signal and transmits it to the microprocessor, the microprocessor executes the control algorithm and issues instructions, controls the current size and direction of the input excitation winding 6, changes the gap magnetic field strength, and then adjusts the damping force size, realizes the effect of intelligent control. Specifically, when the forward direct current is input into the excitation winding 6, the magnetic field direction generated by the excitation winding 6 is consistent with the magnetization direction of the permanent magnet 5, at this time, the permanent magnet 5 and the excitation winding 6 work together, and the gap magnetic field strength can be obviously improved, thereby improving the output of the damping force; when the reverse direct current is input into the excitation winding 6, the magnetic field generated by the excitation winding 6 is opposite to the magnetic field direction of the permanent magnet 5, thereby achieving the effect of suppressing the gap magnetic field strength, and effectively reducing the output of the damping force; when the input current changes between the forward and reverse directions, the damping force generated by the conductor cylinder 10 will also change, thereby realizing the effect of controlling the damping force output by adjusting the direction and size of the direct current; when no current is input into the excitation winding 6, only the permanent magnet 5 works in the magnetic field source, at this time, the damper is equivalent to a passive electric eddy current damper, when the damping force does not need to be adjusted, no current is input, which not only ensures the normal use of the damper, but also effectively saves energy.

[0042] Obviously, the above disclosed embodiments of the utility model are only used for helping the utility model to be described. The embodiments do not describe all the details, and also do not limit the utility model to be the specific implementation mode. According to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. Here, it is not necessary and impossible to exhaust all the implementation modes.

Claims

1. An outer-rotating type smart eddy current damper, characterized by: The utility model provides a kind of shock absorber, including connecting pipe (12), transmission assembly, conductor cylinder (10), multiple shock absorber assemblies and intelligent control module, the multiple shock absorber assemblies are evenly distributed on the outer wall of connecting pipe (12) circumferentially, each shock absorber assembly includes iron core (7), excitation winding (6) and permanent magnet (5), excitation winding (6) is wound on the circumferential side of iron core (7), permanent magnet (5) is fixedly connected on one end of iron core (7), the other end of iron core (7) is fixedly connected on connecting pipe (12), conductor cylinder (10) is rotationally connected on the circumferential side of connecting pipe (12), the transmission assembly includes ball screw (2), flange plate (8) and sleeve (9), ball screw (2) is connected on the top end of connecting pipe (12), the screw rod of ball screw (2) is inserted in connecting pipe (12), the flange plate (8) is connected on screw nut (3), the upper end of sleeve (9) is fixedly connected with flange plate (8), the lower end of sleeve (9) is fixedly connected with conductor cylinder (10), the intelligent control module includes acceleration sensor, microprocessor and current regulator, the acceleration sensor, microprocessor and current regulator are electrically connected, and the current regulator is electrically connected with excitation winding (6).

2. The outer-rotating type intelligent eddy current damper according to claim 1, characterized in that: The cross section of the iron core (7) is wedge-shaped, and the end close to the permanent magnet (5) is toothed.

3. The outer-rotating type intelligent eddy current damper according to claim 1, characterized in that: The outer surface of the connecting pipe (12) is provided with a first annular protrusion (12-1) and a second annular protrusion (12-2), and the upper and lower parts of the conductor cylinder (10) are rotationally connected with the second annular protrusion (12-2) and the first annular protrusion (12-1) respectively through multiple rotating bearings.

4. The outer-rotating type intelligent eddy current damper according to claim 3, characterized in that: The first annular protrusion (12-1) is provided with a wire reservation opening.

5. The outer-rotating type intelligent eddy current damper according to claim 1, characterized in that: The ball screw (2) is connected with the top end of the connecting pipe (12) through multiple thrust bearings (4).

6. The outer-rotating type intelligent eddy current damper according to claim 1, characterized in that: The electrical connections are all direct current power connections.

7. The outer-rotating type intelligent eddy current damper according to claim 1, characterized in that: The permanent magnet (5) and the conductor cylinder (10) have a gap therebetween, and the gap ranges from 1mm to 5mm.

8. The outer-rotating type intelligent eddy current damper according to claim 1, characterized in that: The permanent magnets (5) of the multiple shock absorber assemblies are alternately arranged as N-poles and S-poles along the circumferential side of the connecting pipe (12).

9. The outer-rotating type intelligent eddy current damper according to claim 1, characterized in that: The top end of the screw rod of the ball screw (2) is fixedly connected with an upper connecting end (1), and the bottom end of the connecting pipe (12) is fixedly connected with a lower connecting end (13).

10. The outer-rotating type intelligent eddy current damper according to claim 1, characterized in that: The connecting pipe (12), the iron core (7) and the sleeve (9) are all made of high magnetic permeability material, and the conductor cylinder (10) is made of high electrical conductivity material.

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