CN213204555U - TMD device with eddy current damper - Google Patents
TMD device with eddy current damper Download PDFInfo
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- CN213204555U CN213204555U CN202021858982.5U CN202021858982U CN213204555U CN 213204555 U CN213204555 U CN 213204555U CN 202021858982 U CN202021858982 U CN 202021858982U CN 213204555 U CN213204555 U CN 213204555U
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- support frame
- eddy current
- tmd device
- spring
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Abstract
A TMD device with an eddy current damper comprises a support frame fixed below a floor, a mass block is arranged on the support frame, an adjusting mechanism is arranged between the support frame and the mass block to change the height of a mass center under the action of the mass block adjusting mechanism, a plurality of dampers are arranged between the mass block and the support frame to enable the mass block to vertically oscillate under the influence of the dampers, sensors are arranged on the mass block and the support frame, the sensors detect the oscillation amplitude and frequency of the mass block and the support frame, the structures of a permanent magnet and a coil arranged on the dampers are used for dissipating energy by utilizing the electromagnetic lenz principle to improve the effect of suppressing vibration, the rigidity of the TMD device can be adjusted by an adjusting seat and a second spring to adjust the vibration frequency of the TMD device, generally, the rigidity of the TMD device is increased, the vibration frequency of the TMD device is reduced, and the sensors detect the oscillation amplitude and, thereby acting on the adjustment mechanism to adjust, being suitable for popularization and use.
Description
Technical Field
The utility model relates to a civil engineering technical field, concretely relates to TMD device with eddy current damper.
Background
In the field of civil engineering, it is a common measure to adopt vertical TMD to carry out vibration absorption and vibration reduction control on a pedestrian bridge or a building structure floor slab with smaller vertical natural vibration frequency. While vertically supported TMD applications using compression springs as stiffness elements are very common. An eddy current damper is also used in TMD as a damper having characteristics of no contact, high efficiency, and the like. At present, a general eddy current damping TMD adopts a plate type eddy current damping device structure form, and a conductor adopts a copper plate with high electrical conductivity, so that the mass is large, the manufacturing cost is high, and the engineering popularization is inconvenient. The TMD needs to adjust the frequency of the TMD when the building is installed, and the TMD can have a better vibration reduction effect.
Chinese patent document CN 105386403 a, "an assembled eddy current tuned mass damper for overpass and manufacturing method", continuously adjusts the height of the permanent magnet to approach the tuned mass steel plate of TMD by the knob, the whole structure is complex, the frequency adjustment precision is low, and the vibration damping effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides the TMD device with eddy current damper, solves the complicated, low, the troublesome problem of installation of frequency control precision of current TMD overall structure.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: TMD device with electric eddy current damper, including fixing the support frame under the floor, be equipped with the quality piece on the support frame, be equipped with adjustment mechanism between support frame and the quality piece to make quality piece adjustment mechanism's effect change the barycenter height down, be equipped with a plurality of dampers between quality piece and the support frame, so that the quality piece is along vertical oscillation under the influence of damper, all be equipped with the sensor on quality piece and the support frame, the sensor detects the amplitude of oscillation and the frequency of quality piece and support frame.
In the preferred scheme, the number of the dampers is four, the dampers are uniformly arranged on the periphery of the mass block, and a shell in each damper is fixed on the mass block.
In the preferred scheme, be equipped with the coil in the shell, the centre of coil is equipped with vertical through-hole, and permanent magnet slidable mounting is in the through-hole to can slide along the through-hole, permanent magnet passes through bracing piece and quality piece fixed connection.
In the preferred scheme, vertical guide posts are arranged on two sides of the support frame, the mass block is movably sleeved with the guide posts, and a plurality of first springs are arranged between the support frame and the mass block.
In the preferred scheme, a guide sleeve is arranged between the mass block and the guide post, the first springs are arranged on two sides of the guide post, one end of each first spring is abutted against the inside of the mass block, and the other end of each first spring is abutted against the support frame.
In the preferred scheme, a connecting shaft is arranged between the first spring and the mass block, the end part of the first spring is abutted against one end of the connecting shaft, and the other end of the connecting shaft is connected with the mass block through a first bolt.
In the preferred scheme, the end part of the connecting shaft is a blind hole, a bearing is arranged in the blind hole, an optical axis at the end part of a first bolt penetrates through the bearing, the first bolt abuts against the end surface of the bearing to rotate, and the first bolt is in threaded connection with a screw hole in the mass block;
the height and the levelness of the mass block can be adjusted by adjusting the first bolt.
In the preferred scheme, an adjusting seat in the adjusting mechanism is adjusted in a supporting frame in a sliding mode, a second spring is arranged between the adjusting seat and the mass block, one end of the second spring abuts against the inside of the mass block, and the other end of the second spring abuts against the adjusting seat.
In the preferred scheme, the adjusting seat is arranged in a circular table on the supporting frame to slide, a plurality of second bolts are arranged between the adjusting seat and the circular table, the second bolts are in threaded connection with screw holes in the circular table, and the end parts of the second bolts abut against the end surface of the adjusting seat;
and adjusting the second bolt to drive the adjusting seat to move in the circular truncated cone on the supporting frame so as to change the height of the mass center of the mass block.
In the preferred scheme, the sensor is an acceleration sensor or a vibration sensor, and the sensor is electrically connected with the control host;
through comparing the vibration amplitude and frequency of the mass block displayed by the control host and the support frame, the action adjusting mechanism changes the height of the mass center of the mass block, and a better vibration reduction effect is achieved.
The utility model provides a TMD device with eddy current damper, the attenuator can improve the additional damping of TMD device for neotype eddy current damper greatly, alleviate the attenuator quality simultaneously, the processing equipment is convenient, low in cost, easy engineering is used, the structure of the permanent magnet and the coil of setting, utilize the stupefied inferior principle of electromagnetism to carry out the energy dissipation, further improve the effect of restraining the vibration, adopt and adjust the seat and guarantee the uniformity of design frequency and structure actual frequency with the second spring, adjust the rigidity that TMD device can be adjusted to seat and second spring, with the vibration frequency of adjusting the TMD device, the rigidity increase of ordinary TMD device, then the vibration frequency of TMD device increases, rigidity reduces, then the vibration frequency of TMD device reduces. The sensor contrasts the oscillation amplitude and the frequency of proof mass piece and support frame to effect adjustment mechanism, so that the TMD device can have the good damping effect of ability, hangs the TMD device to the floor bottom, and the support frame both ends pass through welding or bolt fixed connection with the roof beam of floor, improve the installation effectiveness and reduced material cost, are fit for using widely.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a front view of the whole structure of the present invention;
FIG. 2 is a view of the overall bottom structure of the present invention;
FIG. 3 is a front view of the overall structure of the present invention;
FIG. 4 is a top view of the overall structure of the present invention;
FIG. 5 is a cross-sectional view taken along line A-A of the present invention;
fig. 6 is a partial enlarged view a of the present invention;
fig. 7 is a schematic view of the installation of the whole body of the present invention with a floor slab 14;
fig. 8 is a vibration curve diagram of the floor slab 14 of the present invention without mounting TMD devices;
fig. 9 is a graph showing the vibration contrast between the floor slab 14 and the TMD device according to the present invention;
fig. 10 is a graph showing the vibration curve of the floor slab 14 according to the present invention after being installed with the TMD device;
fig. 11 is a graph showing the comparison of the front and rear vibration of the TMD device installed on the floor slab 14 of the present invention;
in the figure: a support frame 1; a circular table 101; a damper 2; a housing 201; a coil 202; a permanent magnet 203; a support bar 204; a mass block 3; a first spring 4; a guide post 5; a sensor 6; a second spring 7; a first bolt 8; a second bolt 9; a guide sleeve 10; a connecting shaft 11; a bearing 12; an adjusting seat 13; a floor slab 14; a beam 15.
Detailed Description
Example 1
As shown in fig. 1 to 7, the TMD device with eddy current damper comprises a support frame 1 fixed under a floor 14, a mass block 3 is arranged on the support frame 1, an adjusting mechanism is arranged between the support frame 1 and the mass block 3 to change the height of the mass center under the action of the adjusting mechanism of the mass block 3, a plurality of dampers 2 are arranged between the mass block 3 and the support frame 1 to enable the mass block 3 to oscillate vertically under the influence of the dampers 2, a sensor 6 is arranged on each of the mass block 3 and the support frame 1, the sensor 6 detects the oscillation amplitude and frequency of the mass block 3 and the support frame 1, thereby fixing the TMD device under the floor 14 of a building through the support frame 1, two ends of the support frame 1 are connected with a beam 15 of the floor 14 through welding or bolt fixing, the adjusting mechanism can adjust the distance between the mass block 3 and the floor 14 of the building, so as to be more fit with a, the effect of suppressing vibration is improved, the damper 2 is an eddy current damper, energy dissipation is carried out by utilizing the electromagnetic lenz principle, the effect of suppressing vibration is further improved, the oscillation amplitude and the frequency of the detection mass block 3 and the support frame 1 are compared, and therefore the adjusting mechanism is more directly visual to adjust, and the better suppression effect is achieved on the vibration of the floor slab 14.
In the preferred scheme, the number of the dampers 2 is four, the dampers are uniformly arranged around the mass block 3, and the shell 201 in each damper 2 is fixed on the mass block 3, so that in the structure, the four eddy current dampers 2 dissipate energy by using the electromagnetic lenz principle, and a better vibration reduction effect can be achieved.
In a preferable scheme, a coil 202 is arranged in the shell 201, a vertical through hole is arranged in the middle of the coil 202, a permanent magnet 203 is slidably arranged in the through hole, and can slide along the through hole, the permanent magnet 203 is fixedly connected with the mass block 3 through the support rod 204, with this structure, the relative movement of the permanent magnet 203 and the coil 202 causes the coil 202 to cut the magnetic induction lines, thereby generating a lorentz force opposite to the movement direction, i.e., eddy current damping force, the gap between coil 202 and permanent magnet 203 is the most critical parameter affecting the damping force, in addition, the effective area and the number of turns of the conductive coil 202, the strength of the permanent magnet 203 and the like have obvious influence on damping, in the embodiment, the permanent magnet 203 is designed in a cylindrical shape, the support rod 204 fixedly connects the permanent magnet 203 with the mass block 3, and the shell 201 and the coil 202 wrap the permanent magnet 203 to form the eddy current resistor 2, so that the installation is simple and convenient, and the manufacturing cost is low.
In the preferred scheme, 1 both sides of support frame are equipped with vertical guide post 5, and quality piece 3 cup joints with the guide post 5 activity, is equipped with a plurality of first springs 4 between support frame 1 and the quality piece 3, from this structure, the guide post 5 of connecting quality piece 3 and support frame 1 can guarantee that quality piece 3 is at vertical relative motion for support frame 1, and first spring and second spring can not take place to block and pause, and the attenuator also can normally work, and the assembly precision is high, and guide post 5 is two, the better direction location effect that plays.
In the preferred scheme, be equipped with uide bushing 10 between quality piece 3 and the guide post 5, first spring 4 is established in the both sides of guide post 5, and first spring 4 one end is supported and is leaned on in quality piece 3, and the other end supports and leans on support frame 1, and from this structure, uide bushing 10 is linear bearing, guarantees the smooth and easy of the vertical removal of quality piece 3 on guide post 5, and vertical installation accuracy is high, and first spring 4 blocks respectively on quality piece 3 and support frame 1, guarantees the straightness that hangs down of first spring 4, and first spring 4 compression is more smooth and easy can not block and pause.
In the preferred scheme, a connecting shaft 11 is arranged between the first spring 4 and the mass block 3, the end part of the first spring 4 abuts against one end of the connecting shaft 11, the other end of the connecting shaft 11 is connected with the mass block 3 through a first bolt 8, therefore, the structure is adopted, the height of the mass block 3 is adjusted by adjusting the first bolt 8, the first bolt 8 is arranged around the mass block 3, the level of the mass block 3 can be adjusted, and the TMD device is higher in precision.
In the preferred scheme, the end part of the connecting shaft 11 is a blind hole, a bearing 12 is arranged in the blind hole, a smooth shaft at the end part of the first bolt 8 penetrates through the bearing 12, the first bolt 8 abuts against the end surface of the bearing 12 to rotate, and the first bolt 8 is in threaded connection with a screw hole on the mass block 3;
adjust the height and the levelness of the adjustable quality piece 3 of first bolt 8, from this structure, bearing 12 between first bolt 8 and the connecting axle 11 can guarantee to rotate first bolt 8 the time, can not drive connecting axle 11 and rotate, avoids influencing first spring 4, convenient and fast's more height and levelness of adjusting quality piece 3.
In the preferred scheme, an adjusting seat 13 in the adjusting mechanism is slidably adjusted in a support frame 1, a second spring 7 is arranged between the adjusting seat 13 and a mass block 3, one end of the second spring 7 abuts against the mass block 3, and the other end of the second spring abuts against the adjusting seat 13, so that the structure is realized, the second spring 7 pushes the mass block 3 through adjusting the adjusting seat 13, the height of the mass center of the mass block 3 is changed, and the frequency of the TMD device is changed.
In a preferable scheme, the adjusting seat 13 is arranged in a circular table 101 on the support frame 1 to slide, a plurality of second bolts 9 are arranged between the adjusting seat 13 and the circular table 101, the second bolts 9 are in threaded connection with screw holes on the circular table 101, and the end parts of the second bolts 9 abut against the end surface of the adjusting seat 13;
adjusting the second bolt 9, drive and adjust seat 13 and remove in the round platform 101 on support frame 1 to make quality piece 3 change the barycenter height, structure from this, adjustment mechanism is four, arranges in the border of quality piece 3, and the accessible is adjusted second bolt 9 top and is pushed away and adjust seat 13 and remove in round platform 101, thereby drives quality piece 3 and removes, changes quality piece 3 barycenter height, reaches the frequency that changes the TMD device.
In the preferred scheme, the sensor 6 is an acceleration sensor or a vibration sensor, and the sensor 6 is electrically connected with a control host;
Example 2
As shown in fig. 8 to 11, a TMD device with an eddy current damper, fig. 8 is a graph of vibration before mounting the TMD device, fig. 9 is a graph of comparison between vibration frequency of a floor 14 and vibration frequency of the TMD device, in which vibration of the TMD device has a certain time difference with vibration of the floor 14 due to a certain time lag caused by inertia, and vibration amplitude direction of the TMD device and vibration amplitude direction of the floor 14 are opposite to each other at the same time to cancel out each other, thereby achieving a vibration suppression effect, by observing the graph of comparison between vibration frequency in fig. 9, a frequency of the TMD device is adjusted by an adjusting mechanism, so that the TMD device achieves a better vibration suppression effect, fig. 10 is a graph of vibration of the floor 14 after mounting the TMD device, fig. 11 is a graph of comparison between vibration curve of the floor 14 before and after mounting the TMD device, it can be clearly seen that the vibration curve after mounting the TMD device becomes gentler, and the vibration amplitude is small, so that the TMD device has excellent vibration reduction effect.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (9)
1. TMD device with electric eddy current damper, characterized by: including fixing support frame (1) under floor (14), be equipped with quality piece (3) on support frame (1), be equipped with adjustment mechanism between support frame (1) and quality piece (3), so that quality piece (3) adjust the barycenter height under adjustment mechanism's effect, be equipped with a plurality of dampers (2) between quality piece (3) and support frame (1), so that quality piece (3) are along vertical oscillation under the influence of damper (2), all be equipped with sensor (6) on quality piece (3) and support frame (1), so that sensor (6) detect the amplitude of oscillation and the frequency of quality piece (3) and support frame (1).
2. A TMD device with eddy current damper according to claim 1, wherein: the number of the dampers (2) is four, the dampers are uniformly arranged on the periphery of the mass block (3), and a shell (201) in each damper (2) is fixed on the mass block (3).
3. A TMD device with eddy current damper according to claim 2, wherein: be equipped with coil (202) in shell (201), the centre of coil (202) is equipped with vertical through-hole, and permanent magnet (203) slidable mounting is in the through-hole to can slide along the through-hole, permanent magnet (203) pass through bracing piece (204) and quality piece (3) fixed connection.
4. A TMD device with eddy current damper according to claim 1, wherein: vertical guide posts (5) are arranged on two sides of the support frame (1), the mass block (3) is movably sleeved with the guide posts (5), and a plurality of first springs (4) are arranged between the support frame (1) and the mass block (3).
5. A TMD device with eddy current damper according to claim 4, wherein: be equipped with uide bushing (10) between quality piece (3) and guide post (5), first spring (4) are established in the both sides of guide post (5), and first spring (4) one end is supported and is leaned on in quality piece (3), and the other end supports and leans on support frame (1).
6. A TMD device with eddy current damper according to claim 5, wherein: a connecting shaft (11) is arranged between the first spring (4) and the mass block (3), the end of the first spring (4) abuts against one end of the connecting shaft (11), and the other end of the connecting shaft (11) is connected with the mass block (3) through a first bolt (8).
7. A TMD device with eddy current damper according to claim 6, wherein: the end part of the connecting shaft (11) is a blind hole, a bearing (12) is arranged in the blind hole, a smooth shaft at the end part of the first bolt (8) penetrates through the bearing (12), the first bolt (8) abuts against the end surface of the bearing (12) to rotate, and the first bolt (8) is in threaded connection with a screw hole in the mass block (3);
the height and the levelness of the mass block (3) can be adjusted by adjusting the first bolt (8).
8. A TMD device with eddy current damper according to claim 1, wherein: an adjusting seat (13) in the adjusting mechanism is slidably adjusted in the supporting frame (1), a second spring (7) is arranged between the adjusting seat (13) and the mass block (3), one end of the second spring (7) abuts against the mass block (3), and the other end of the second spring abuts against the adjusting seat (13).
9. A TMD device with eddy current damper according to claim 8, wherein: the adjusting seat (13) is arranged in a circular table (101) on the supporting frame (1) to slide, a plurality of second bolts (9) are arranged between the adjusting seat (13) and the circular table (101), the second bolts (9) are in threaded connection with screw holes in the circular table (101), and the end parts of the second bolts (9) abut against the end surface of the adjusting seat (13);
and adjusting the second bolt (9) to drive the adjusting seat (13) to move in the circular truncated cone (101) on the support frame (1) so as to change the height of the mass center of the mass block (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021858982.5U CN213204555U (en) | 2020-08-31 | 2020-08-31 | TMD device with eddy current damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021858982.5U CN213204555U (en) | 2020-08-31 | 2020-08-31 | TMD device with eddy current damper |
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| Publication Number | Publication Date |
|---|---|
| CN213204555U true CN213204555U (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021858982.5U Active CN213204555U (en) | 2020-08-31 | 2020-08-31 | TMD device with eddy current damper |
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|---|---|
| CN (1) | CN213204555U (en) |
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2020
- 2020-08-31 CN CN202021858982.5U patent/CN213204555U/en active Active
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