CN221142439U - Novel damping stepless-adjusting eddy current tuning mass damper - Google Patents
Novel damping stepless-adjusting eddy current tuning mass damper Download PDFInfo
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- CN221142439U CN221142439U CN202322364067.0U CN202322364067U CN221142439U CN 221142439 U CN221142439 U CN 221142439U CN 202322364067 U CN202322364067 U CN 202322364067U CN 221142439 U CN221142439 U CN 221142439U
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- 238000013016 damping Methods 0.000 title claims abstract description 80
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 239000004020 conductor Substances 0.000 claims abstract description 58
- 210000000078 claw Anatomy 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a novel damping stepless-adjustment eddy current tuning mass damper which comprises an outer frame unit, a mass block unit, a spring unit and a damping stepless-adjustment unit, wherein the damping stepless-adjustment unit comprises a magnetic steel component, an adjustment component and a conductor component arranged on the adjustment component, the mass block unit is connected with the outer frame unit through the spring unit, the magnetic steel component is arranged on the outer frame unit, the adjustment component is arranged on the mass block unit, and the damping between the conductor component and the magnetic steel component is adjusted through the adjustment component. The utility model can meet the requirements of different damping ratios, can realize one stepless adjustment of the damping ratio, ensures the accuracy of the adjustment of the damping ratio of the tuned mass damper, improves the energy consumption efficiency and improves the bridge comfort evaluation.
Description
Technical Field
The utility model relates to the technical field of bridge vibration reduction, in particular to a novel damping stepless-adjustment eddy current tuning mass damper.
Background
In recent years, a plurality of bridges with large spans at home and abroad have obvious vortex-induced vibration problems, and the wide attention of the whole society is brought; with the development of society, the demands of people for pedestrian landscape bridges are increasing, and the comfort requirements for the pedestrian landscape bridges are becoming strict; measures are beginning to be discussed regarding the vibration mechanism and vibration control of bridges and building structures.
With the continuous development of technology, the number of large-span bridges and special-shaped structure pedestrian landscape bridges in the civil industry is continuously increased, and the aesthetic degree of the landscape bridges is increasingly improved. Along with the increase of bridge span, the material is light and flexible, so that the structural quality is light, and the structural rigidity is reduced; when a dynamic load is applied (when excitation is continuously carried out at a specific frequency), the natural frequency of the bridge and the excitation frequency resonate, the dynamic response of the structure is increased, the structure vibrates frequently, and the vibration amplitude is increased. Aiming at the vibration type, a tuned mass damper is adopted for control, and the vibration reduction effect is good.
The tuning mass damper is a mechanical device consisting of a mass block unit, a spring unit, a supporting frame unit and a damping unit; it absorbs the vibrational energy of the main structure onto the mass, converts it into other forms of energy and dissipates it. The traditional damper is generally mechanical and hydraulic, the mechanical friction damper has large starting friction, the hydraulic damper has oil leakage phenomenon, and the eddy current damper can meet the requirements of high sensitivity and long maintenance life.
Most of the existing tuned mass dampers are installed on bridges, simple, convenient and effective damping and frequency adjustment cannot be performed on site, and the damping size is not accurately adjusted, so that the optimal damping efficiency may not be achieved.
The existing tuned mass dampers are divided into traditional mechanical dampers and hydraulic dampers, and electric vortex dampers with high starting sensitivity; in view of a complexity of bridge engineering construction, factors in various aspects cause a deviation of bridge reality and theory (bridge modal frequency, bridge structure damping ratio). The design of the tuned mass damper by adopting theoretical parameters can cause that the vibration reduction effect of the tuned mass damper cannot reach the best; after the bridge construction is completed and the on-site test is performed, the design of the tuned mass damper can prolong the bridge construction period and influence the delivery period. The utility model provides a novel damping stepless adjusting eddy current tuning mass damper.
Disclosure of utility model
Aiming at the problems existing in the prior art, the application provides the novel damping stepless-adjustment eddy current tuning mass damper which is applied to a pedestrian landscape bridge, reasonably cooperates with a determined construction period, simplifies the installation process of the tuning mass damper, and can realize the damping adjustment of the tuning mass damper in a box girder according to actual measurement data after the bridge is formed, thereby achieving the optimal damping effect.
The technical scheme for realizing the aim of the utility model is as follows: the utility model provides a novel stepless regulation electric vortex tuning mass damper of damping, includes outer frame unit, quality piece unit, spring unit, the stepless regulation unit of damping includes magnet steel subassembly, adjusting part and locates the conductor assembly on the adjusting part, the quality piece unit passes through the spring unit and is connected with outer frame unit, magnet steel subassembly is located on the outer frame unit, adjusting part locates on the quality piece unit, the damping size between conductor assembly and the magnet steel subassembly passes through adjusting part adjusts.
Preferably, the adjusting component comprises a chuck body arranged on the mass block unit, a big bevel gear arranged in the chuck body, at least one bevel gear meshed with the big bevel gear, and a plurality of movable claws capable of radially moving along the chuck body, wherein one side of each movable claw, which is close to the magnetic steel component, is provided with a conductor component, and the movable claws are driven by the bevel gear to radially move along the chuck body through sliding grooves on the big bevel gear, so that the conductor component is driven to be far away from/close to the magnetic steel component.
Preferably, an axial hollow channel is arranged in the mass block assembly, the magnetic steel assembly is arranged in the axial hollow channel, and the conductor assembly can radially move in the axial hollow channel to be far away from/close to the magnetic steel assembly.
Preferably, the outer frame unit comprises an upper top plate assembly and a lower bottom plate assembly connected with the upper top plate assembly through a supporting assembly, the spring unit is connected with the lower bottom plate assembly, and the magnetic steel assembly is arranged on the lower bottom plate assembly.
Preferably, a guide assembly is arranged between the upper top plate assembly and the lower bottom plate assembly, the mass block unit is connected with the lower bottom plate assembly through a spring unit, and the mass block unit moves vertically along the guide assembly under the action of the spring unit.
Preferably, the magnetic steel assembly comprises a magnetic steel fixing frame arranged on the lower bottom plate assembly, a magnetic steel frame arranged on the magnetic steel fixing frame, and a plurality of magnetic steels arranged on the magnetic steel frame, wherein the plurality of magnetic steels are arranged along the circumference of the magnetic steel frame.
Preferably, the conductor assembly comprises a conductor plate back plate arranged on the movable claw and a conductor plate arranged on the conductor plate back plate, the conductor plate back plate is arranged according to the shaping of the conductor plate, and the conductor plate is arranged in an arc shape.
Preferably, the number of the conductor plates is three, and the number of the movable claws is 3.
By adopting the technical scheme, the utility model has the following beneficial effects: (1) The damper adjusting device is adjusted to meet different damping ratio requirements, and as gear parts are arranged in the damper adjusting device, stepless adjustment of the damping ratio can be achieved, accuracy of adjustment of the damping ratio of the tuned mass damper is guaranteed, energy consumption efficiency is improved, and bridge comfort evaluation is improved. .
(2) The damping unit adopts an eddy current damping technology, a damping stepless adjusting device (a conductor plate and magnetic steel generate relative motion and control the vertical damping ratio) is arranged in the tuned mass damper, when the conductor plate in a local magnetic field cuts magnetic lines of force, eddy current is generated in the conductor plate, the eddy current interacts with the original magnetic field to generate a force for preventing the relative motion of the conductor plate and the magnetic field, kinetic energy is converted into heat energy to be dissipated, the damping ratio of a bridge structure is increased, the vibration amplitude damping rate of the bridge is accelerated, and the vibration damping effect is achieved. The electric vortex tuning mass damper does not depend on mechanical friction energy consumption, has no problems of liquid leakage and sealing without working fluid, has the advantages of high reliability, good durability, compact and reasonable structure and the like, and is particularly suitable for working environments requiring long fatigue life and difficult maintenance. .
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which
FIG. 1 is a three-dimensional view of a novel damping stepless adjustment eddy current tuned mass damper of the present utility model;
FIG. 2 is a front view of a novel damping stepless adjustment eddy current tuning mass damper of the present utility model;
FIG. 3 is a cross-sectional view of A-A of FIG. 2;
FIG. 4 is a top view of the novel damping stepless adjustment eddy current tuning mass damper of the present utility model;
FIG. 5 is a cross-sectional view of B-B of FIG. 4;
FIG. 6 is a three-dimensional view of a damping stepless adjustment unit in the present utility model;
FIG. 7 is a front view of FIG. 6;
FIG. 8 is a cross-sectional view of D-D of FIG. 7;
FIG. 9 is a cross-sectional view of C-C of FIG. 7;
FIG. 10 is a cross-sectional view of E-E of FIG. 7;
FIG. 11 is a schematic view of a novel damping stepless adjustment device for adjusting the damping size scale;
FIG. 12 is a schematic diagram of a novel damping stepless adjusting device for adjusting the damping;
FIG. 13 is a schematic diagram of a novel damping stepless adjustment eddy current tuned mass damper box girder installation.
Detailed Description
Example 1
Referring to fig. 1 to 13, the novel damping stepless adjustment eddy current tuning mass damper of the present embodiment is a novel damping stepless adjustment eddy current tuning mass damper, and is characterized in that: the damping stepless adjusting device comprises an outer frame unit 4, a mass block unit 1, a spring unit 2 and a damping stepless adjusting unit 3, wherein the damping stepless adjusting unit comprises a magnetic steel component 31, an adjusting component 32 and a conductor component 33 arranged on the adjusting component, the mass block unit is connected with the outer frame unit through the spring unit, the magnetic steel component is arranged on the outer frame unit, the adjusting component is arranged on the mass block unit, and the damping between the conductor component and the magnetic steel component is adjusted through the adjusting component.
The adjusting component 32 comprises a chuck body 321 arranged on the mass block unit, a big bevel gear 322 arranged in the chuck body, at least one bevel gear 323 meshed with the big bevel gear, and a plurality of movable claws 324 capable of radially moving along the chuck body, wherein one side of each movable claw, which is close to the magnetic steel component, is provided with a conductor component, and the movable claws are driven by the bevel gear to radially move along the chuck body through sliding grooves on the big bevel gear so as to drive the conductor component to be far away from/close to the magnetic steel component. According to the working principle of the three-jaw chuck, any one of 3 bevel gears on the circumference is rotated by using the chuck wrench 6, the plane threads on the back surface of the large bevel gear are driven to rotate, the 3 movable jaws are driven to move together, and the conductor assembly is arranged on the movable jaws, so that the gap between the magnetic steel and the conductor plate can be adjusted, and the stepless adjustment of the damping size is achieved. Because the 3 movable claws move simultaneously, the conductor assemblies on the 3 movable claws can be ensured to be consistent with the magnetic steel gaps. The chuck wrench may be replaced with other drive mechanisms. Meanwhile, the side surface of the movable claw is carved with a gap adjusting scale 7, and the chuck body is also provided with a gap adjusting mark 8, so that the gap between the conductor plate and the magnetic steel can be intuitively observed; the damping size of the tuned mass damper can be conveniently and rapidly adjusted on the bridge site according to factory measurement data, so that the optimal damping size is achieved, and the optimal bridge vibration reduction effect is achieved.
The mass block assembly is internally provided with an axial hollow channel 5, the magnetic steel assembly is arranged in the axial hollow channel, and the conductor assembly can radially move in the axial hollow channel to be far away from/close to the magnetic steel assembly.
The outer frame unit 4 comprises an upper top plate assembly 41 and a lower bottom plate assembly 43 connected with the upper top plate assembly through a supporting assembly 42, the spring unit is connected with the lower bottom plate assembly, and the magnetic steel assembly is arranged on the lower bottom plate assembly.
The guide assembly 44 is arranged between the upper top plate assembly and the lower bottom plate assembly, the mass block unit is connected with the lower bottom plate assembly through a spring unit, and the mass block unit moves vertically along the guide assembly under the action of the spring unit. The spring is limited on the lower bottom plate component through the spring centering seat, and the spring supports the mass block component to form the most main spring-mass structure of the tuned mass damper.
The outer frame unit plays a role of integral support and is connected with the bridge main body during installation; the mass block unit and the spring unit meet the mass ratio parameter and the vibration frequency parameter of the tuned mass damper; the guide component controls the vertical vibration of the mass block, so that the possible phenomenon of swinging or overturning in the non-main vibration direction is effectively eliminated; the damping stepless adjusting device is a Tuned Mass Damper (TMD) damping system which is mainly used for dissipating energy, and achieves damping stepless adjustment through parts such as gears, and the like, and the damping ratio of the tuned mass damper is accurately controlled, so that a better bridge damping effect is achieved. Meanwhile, the spring unit and the guide assembly are independently and separately arranged, and after the tuned mass damper is mounted on the bridge main body, the spring and the mass block can still be freely replaced to adjust the frequency parameter and the mass ratio parameter of the eddy current tuned mass damper.
The mass block assembly consists of a main mass block for mounting the sliding part and an additional mass block for adjustment; the guide group price consists of a guide rod and a sliding part; the spring unit consists of a spring and a spring limiting centering seat; the damping part is an eddy current magnetic damping part, has no working fluid, does not have the condition of liquid leakage, and mainly comprises a damping stepless adjusting device; the upper top plate component mainly comprises a guide rod positioning frame and a mass block limiting anti-collision rubber.
The spring is limited on the lower bottom plate component through a spring centering seat, and the spring supports the mass block component to form a main spring-mass structure (determining the frequency of the damper) of the tuned mass damper; the guide rod passes through the sliding part fixed on the main mass block, the lower end of the guide rod is fixed on the bottom plate assembly, and the movement direction of the mass block is controlled to be in a vertical direction; the upper end of the guide rod is fixed on the upper top plate assembly, so that the guide rod is fixed and positioned; the supporting component is connected with the upper top plate component and the lower bottom plate component, so that the upper top plate component and the lower bottom plate component form a complete outer frame structure; the damping stepless regulating device is divided into two main components (a conductor component and a magnetic steel component) which are respectively fixed on a mass block component and a lower bottom plate component, wherein the conductor component consisting of a chuck body, a bevel gear, a conductor plate back plate and a conductor plate is fixed on the mass block component through bolts and moves vertically along with the mass block component, and the magnetic steel, a magnetic steel frame and a magnetic steel frame fixing seat are fixed on the lower bottom plate component of a fixed plate and are fixed on a box girder connecting piece along with the lower bottom plate component. When the bridge body vibrates, the mass block assembly vibrates, the conductor assembly and the magnetic steel assembly relatively move, an electric vortex is generated in the conductor plate when the conductor plate in the local magnetic field cuts magnetic lines, the electric vortex can interact with the original magnetic field to generate a force for obstructing the relative movement of the conductor plate and the magnetic field, kinetic energy is converted into heat energy to be dissipated, the damping ratio of the bridge structure is increased, the vibration amplitude damping rate of the bridge is accelerated, and the vibration damping effect is achieved.
The magnetic steel assembly 31 comprises a magnetic steel fixing frame 311 arranged on the lower base plate assembly, a magnetic steel frame 312 arranged on the magnetic steel fixing frame, and a plurality of magnetic steels 313 arranged on the magnetic steel frame, wherein the plurality of magnetic steels are arranged along the circumference of the magnetic steel frame.
The conductor assembly 33 includes a conductor plate back plate 331 disposed on the movable claw and a conductor plate 332 disposed on the conductor plate back plate, wherein the conductor plate back plate is formed according to the conductor plate, and the conductor plate is disposed in a circular arc shape.
The number of the conductor plates is three, and the number of the movable claws is 3. The quantity of the three is favorable for saving more force and uniform stress during damping adjustment.
The utility model also provides a novel installation and adjustment method for the damping stepless adjustment eddy current tuning mass damper, which comprises the following steps:
(1) Assembling the tuned mass damper as a whole;
(2) The tuning mass damper is welded in the box girder through a connecting piece 9 and is fixedly connected with the connecting piece through a lower bottom plate component through bolts; when the connecting piece is welded, the contact surface of the connecting piece and the tuned mass damper is horizontal.
(3) The chuck wrench 6 is adopted to rotate any one of bevel gears on the circumference, so that the plane threads on the back surface of the large bevel gear are driven to rotate, and a plurality of movable claws are driven to move together, so that the gap between the magnetic steel and the conductor plate can be adjusted, and the stepless adjustment of the damping size is achieved.
When the bridge is installed on site, the novel damping stepless-adjustment eddy current tuning mass damper is simple, convenient and quick to install, and only a connecting piece is reserved in the bridge box girder, the tuning mass damper is hoisted on the connecting piece, and the novel damping stepless-adjustment eddy current tuning mass damper is connected with a mounting hole on the connecting piece through a mounting hole reserved on a body lower bottom plate assembly by bolts
The connecting piece is welded in the box girder, and the tuning mass damper is fixedly connected with the connecting piece through a bottom plate component through a bolt; the form of the connecting piece can be correspondingly adjusted along with the form of the box girder. When the connecting piece is welded, the contact surface of the connecting piece and the tuned mass damper is required to be ensured to be horizontal, so that the main body structure of the tuned mass damper is ensured to be kept horizontal, and the optimal damping and vibration reducing effect of the tuned mass damper is exerted.
While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.
Claims (8)
1. A novel damping stepless regulation eddy current tuning mass damper is characterized in that: the damping stepless adjusting device comprises an outer frame unit (4), a mass block unit (1), a spring unit (2) and a damping stepless adjusting unit (3), wherein the damping stepless adjusting unit comprises a magnetic steel component (31), an adjusting component (32) and a conductor component (33) arranged on the adjusting component, the mass block unit is connected with the outer frame unit through the spring unit, the magnetic steel component is arranged on the outer frame unit, the adjusting component is arranged on the mass block unit, and the damping between the conductor component and the magnetic steel component is adjusted through the adjusting component.
2. The novel damping stepless adjustment eddy current tuning mass damper of claim 1, wherein: the adjusting component (32) comprises a chuck body (321) arranged on the mass block unit, a big bevel gear (322) arranged in the chuck body, at least one bevel gear (323) meshed with the big bevel gear, and a plurality of movable claws (324) capable of moving radially along the chuck body, wherein one side of each movable claw, which is close to the magnetic steel component, is provided with a conductor component, and the movable claws are driven by the bevel gear to move radially along the chuck body through sliding grooves on the big bevel gear, so that the conductor component is driven to be far away from/close to the magnetic steel component.
3. The novel damping stepless adjustment eddy current tuning mass damper of claim 1, wherein: an axial hollow channel (5) is arranged in the adjusting component, the magnetic steel component is arranged in the axial hollow channel, and the conductor component can radially move in the axial hollow channel to be far away from/close to the magnetic steel component.
4. The novel damping stepless adjustment eddy current tuning mass damper of claim 1, wherein: the outer frame unit (4) comprises an upper top plate assembly (41) and a lower bottom plate assembly (43) connected with the upper top plate assembly through a supporting assembly (42), the spring unit is connected with the lower bottom plate assembly, and the magnetic steel assembly is arranged on the lower bottom plate assembly.
5. The novel damping stepless adjustment eddy current tuning mass damper of claim 4, wherein: and a guide assembly (44) is arranged between the upper top plate assembly and the lower bottom plate assembly, the mass block unit is connected with the lower bottom plate assembly through a spring unit, and the mass block unit vertically moves along the guide assembly under the action of the spring unit.
6. The novel damping stepless adjustment eddy current tuning mass damper of claim 4, wherein: the magnetic steel assembly (31) comprises a magnetic steel fixing frame (311) arranged on the lower bottom plate assembly, a magnetic steel frame (312) arranged on the magnetic steel fixing frame and a plurality of magnetic steels (313) arranged on the magnetic steel frame, wherein the plurality of magnetic steels are arranged along the circumference of the magnetic steel frame.
7. The novel damping stepless adjustment eddy current tuning mass damper of claim 2, wherein: the conductor assembly (33) comprises a conductor plate back plate (331) arranged on the movable claw and a conductor plate (332) arranged on the conductor plate back plate, wherein the conductor plate back plate is arranged according to the shaping of the conductor plate, and the conductor plate is arranged in an arc shape.
8. The novel damping stepless adjustment eddy current tuning mass damper of claim 7, wherein: the number of the conductor plates is three, and the number of the movable claws is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322364067.0U CN221142439U (en) | 2023-08-31 | 2023-08-31 | Novel damping stepless-adjusting eddy current tuning mass damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322364067.0U CN221142439U (en) | 2023-08-31 | 2023-08-31 | Novel damping stepless-adjusting eddy current tuning mass damper |
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| Publication Number | Publication Date |
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| CN221142439U true CN221142439U (en) | 2024-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322364067.0U Active CN221142439U (en) | 2023-08-31 | 2023-08-31 | Novel damping stepless-adjusting eddy current tuning mass damper |
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| Country | Link |
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| CN (1) | CN221142439U (en) |
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2023
- 2023-08-31 CN CN202322364067.0U patent/CN221142439U/en active Active
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