JP2749268B2 - Vibration damping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device for structures such as bio-related facilities, chemicals handling facilities, precision environment facilities, computer-related facilities, and general houses and offices. More specifically, the present invention relates to a vibration damping device using a functional fluid whose viscosity changes by application of an electric field or a magnetic field to change the strength of shear stress.

[0002]

2. Description of the Related Art Conventionally, as a damping device for damping the vibration of a structure caused by an external force, for example, a damping device described in Japanese Patent Application Laid-Open No. 6-158911 is known as an example used as a part of a seismic isolation device. I have.

This damping device uses an electrorheological (ER) fluid or an electromagnetorheological (EMR) fluid, and an electrode member applies a damping amount to the electrorheological fluid according to a deformation level of an external force applied to a structure. , The response can be reduced, and the combination of the damping device and the laminated rubber can expect a seismic isolation effect from a small deformation region to a large deformation region.

[0004]

However, the above-mentioned damping device is provided with two front, rear, left, and right sides in a three-dimensional space.
It exerts a damping effect in the direction, there is no vertical damping effect, and because it is used interposed between the installation location and the structure, it easily responds to minute vibration of the floor and beams, and There was a problem that the entire damping device was not compact and could not be easily set.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a vibration damping device having an effect of damping vibration energy in three directions of up, down, front, rear, right and left in a three-dimensional space with one compact damping device. And

[0006]

The gist of the present invention to solve the above-mentioned problems and achieve the above-mentioned object is to provide a damping device for damping the vibration of a structure caused by a disturbance, wherein a flat electrode plate is horizontally arranged. Laminated to an arbitrary thickness with a gap, a horizontal damping means formed by sealing the functional fluid in the gap via packing, and the cylindrical electrode walls of each other are A pair of bottomed multiple cylindrical electrode members having electrode walls arranged concentrically so as to be sandwiched between the cylindrical electrode walls are fitted in a vertically opposed manner, and a gap between adjacent cylindrical electrode walls is fitted. And a vertical damping means formed by sealing a functional fluid with packing.

[0007] Further, the packing is formed of a rubber packing and a Teflon packing, and the rubber packing is disposed inside the Teflon packing;
And the Teflon-based packing is fixed by an adhesive on one side of the surfaces that are sandwiched and abutted by the electrode plate and the cylindrical electrode wall, respectively; Or vertical damping means are provided surrounding the vertical damping means; horizontal damping means are provided above and below the vertical damping means. .

[0008]

According to the vibration damping device of the present invention, the damping action in three directions in a three-dimensional space is exhibited by one damping device. Furthermore, the arrangement of the stacked horizontal damping means and the vertical damping means in the bottomed multiple cylindrical electrode member is
One is disposed so as to surround the other, or is sandwiched vertically, so that the overall configuration of the vibration damping device is small and compact, and the horizontal damping means is laminated to an arbitrary thickness. Therefore, it exhibits a damping effect in response to small vibrations, and is also suitable for construction in ordinary houses and offices where it was difficult to exhibit the seismic isolation effect even if it was conventionally configured as a part of the seismic isolation device It will be.

[0009]

Next, an embodiment according to the present invention will be described in detail with reference to the drawings. As shown in the drawing, a first embodiment of the present invention is a horizontal damping device 1 which is a horizontal damping means.
And a vertical damping device 2 which is a vertical damping device disposed so as to surround the damping device 1.

As shown in FIGS. 1 to 4, the horizontal damping device 1 has a flat plate-like electrode plate 3 which is horizontally stacked at an arbitrary height with a gap. The height of the stacked electrode plates 3 is adjusted by stacking a plurality of thin adjustment plates 1b.

A functional fluid (ER fluid or EMR fluid) 5 is sealed in the gap between the electrode plates 3 and 3 via a packing 4.

As shown in FIG. 3, the packing 4 is composed of a Teflon packing 4a made of Teflon and a rubber packing 4b made of rubber disposed inside the Teflon packing 4a. It is in shape. The Teflon packing 4a may be made of a hard plastic packing instead of this, so as to take friction on the contact surface.

In FIG. 3, the Teflon packing 4a is adhered to the lower electrode plate 3 with an adhesive, and is slidable with the upper electrode plate 3.

The rubber packing 4b has a circular cross section and is set so as to be laminated and slightly crushed. The inside of the rubber packing 4b is filled with a functional fluid 5 as shown in FIG.

Although not shown, the electrode plates 3 are each connected to a power source, and are connected so that a positive pole and a negative pole alternate.

Next, as shown in FIGS. 5 to 7, the vertical damping device 2 has one cylindrical electrode wall 6a, 6b,.
a, 7b,...) are cylindrical electrode walls 7a, 7b,.
(6a, 6b,...), A plurality of electrode walls 6a,... Or 7a,. The multiple cylindrical electrode members 6 and 7 are fitted so as to be opposed to each other in the vertical direction, and adjacent cylindrical electrode walls (for example, 6a and 7).
In the gap a), the functional fluid 5 is formed by sealing with a packing 8.

Although not shown, the base plates 6p and 7p of the bottomed multi-cylinder electrode members 6 and 7 have a positive electrode of a power source,
One of the poles is to be connected.

As shown in FIG. 6, the packing 8 is the same as the horizontal damping device 1 described above, and includes a ring-shaped Teflon packing 8a and a rubber packing 8b.

In assembling the vertical damping device 2, for example, the ring-shaped Teflon packing 8a is slid into contact with the bottomed multi-cylinder electrode member 6 at a predetermined depth by using a jig or the like. Apply adhesive to the surface and set it before it dries.

In this case, the necessary number of Teflon packings 8a need to be concentrically pushed in at the same time by a jig or the like.

Next, a required number of ring-shaped rubber packings 8b are put together and pressed in with a jig or the like. Furthermore, the rubber packing 8b and the Teflon packing 8a coated with an adhesive are set while securing a space for the functional fluid 5.

In FIG. 5, after a plurality of Teflon packings 8a arranged concentrically at two upper and lower locations are sufficiently fixed with an adhesive, the cylindrical electrode walls 6a, 6b,. , 7b,... Are opposed to each other, and the bottomed multiple tube electrode member 7 is fitted to the bottomed multiple tube electrode member 6 in the vertical direction.

Then, the cylindrical electrode walls (for example, 6a, 7
The functional fluid 5 is poured into the through holes 9a, 9b, 9c,... communicating with the gaps a) by an injection pump (not shown), and the gaps are filled with the functional fluid 5.

A thread groove is formed in the through hole 9a, and a screw cap is screwed after the filling operation of the functional fluid 5 is completed.

In this way, the vibration damping device 12 is formed by the horizontal damping device 1 and the vertical damping device 2, and as shown in FIGS. 1 and 8, for example, installed between the building 10 and the foundation 11 Is done.

In the vibration damping device 12, a columnar support 13 having a hole 13a at the center of the lower portion for fitting with the projection 1a provided on the upper portion of the horizontal damping device 1 is vertically connected to the horizontal damping device 1. It is slidable in the horizontal direction, and is placed with its movement restricted in the horizontal direction. A Teflon sheet is interposed on the sliding contact surface between the protrusion 1a and the hole 13a to reduce frictional resistance.

A thread groove is formed on the outer peripheral surface of the connecting projection 13b provided at the center of the upper end of the supporting body 13, and the supporting body 13 is connected to the building 10 via the connecting projection 13b.
It is screwed into a screw hole at the center of the plate 14 fixed to the side with bolts or the like.

Further, the connecting projection 13b is loosely inserted into the central hole of the base plate 6p of the bottomed multi-tubular electrode member 6 with a sufficient margin, and the support 13 is screwed to the plate 14 to make the figure. As shown in FIG. 9, the base plate 6p is vertically and vertically (up and down)
And the base plate 6p in the horizontal direction.
The ring-shaped Teflon sheets 15 and 16 are interposed on the abutting surface of the sheet and are slidable. The Teflon sheets 15 and 16 are attached to one of them with an adhesive.

The base plate 7p of the vertical damping device 2 is fixed to the base 11 with bolts or the like. In this way, the vibration damping device 12 formed as a unit is used for the building 10 and the foundation 1.
It is installed in a required number at an arbitrary place between the two and is used as a seismic isolation device together with the laminated rubber 17 as shown in FIG.

When vibrations such as a heavy vehicle passing or a vibration such as an earthquake are transmitted to the building 10 to the vibration damping device 12, the horizontal damping device 1 responds to horizontal disturbance in accordance with the magnitude of the disturbance. A predetermined current is applied to the laminated electrode plates 3, 3,... And a voltage is applied, so that the shear stress of the functional fluid 5 increases, resists disturbance, and absorbs energy. Further, in this horizontal damping device 1, the projection 1a is not affected by a vertical disturbance.
Slides on the sliding contact surface between the hole 13a.

In the vertical damping device 2 against a vertical disturbance, a predetermined current is applied to the bottomed multiple cylindrical electrode members 6 and 7 in accordance with the magnitude of the disturbance, and a voltage is applied to the cylindrical electrode members 6 and 7. The shearing force of the functional fluid 5 filled in the gaps between the walls 6a,..., 7a is increased to resist the disturbance and absorb energy. Further, in the vertical damping device 2, the base plate 6p is connected to the plate 14 and the support 1 against horizontal disturbance.
3 while sliding in the horizontal direction while being sandwiched by the shoulders.

In this case, how to set the level of the voltage to the horizontal damping device 1 and the vertical damping device 2 against disturbance is determined by the electric field output in the control determination routine as shown in FIGS. According to the level judgment, the horizontal / vertical sensors (accelerometers, speedometers, displacement meters, etc., for example, accelerometers) 18 set on the building 10 are used for A / D.
The control unit 19 determines whether the disturbance transmitted via the converter is larger or smaller than the determination values of 25 Gal and 250 Gal in three stages, and a current set in advance according to each level is determined by each vibration damping device 12. The horizontal damping device 1 and the vertical damping device 2 are independently applied to apply a predetermined voltage. Needless to say, the judgment value and the level are determined arbitrarily by the setter.

In this way, the response of the building 10 to a wide range of vibrations is reduced by varying the viscous resistance of the functional fluid 5 by voltage control regardless of whether the disturbance is small or large.

Further, since the horizontal damping device 1 is formed in a stacked state, and the vertical damping device 2 is formed in a cylindrical shape so as to surround the horizontal damping device 1, the entire device is made extremely small and compact. It has become something.

Next, according to a second embodiment of the present invention, as shown in FIGS. 12 to 14, the vibration damping device 20 is arranged such that the vertical damping device 2 is positioned at the center in the vertical direction, and the horizontal damping device is located above and below the vertical damping device. 1 and 1 are provided to make the damping device stacked and compact.

The basic structure of the horizontal damping device 1 and the vertical damping device in this device is the same as that of the first embodiment. The vertical movement of the device 1 is restrained. The vertical damping device 2 in this device is
A concave portion 22 and a convex portion 23 are provided at the center thereof and fitted, and a Teflon sheet is interposed on the sliding contact surface to form a pivotally slidable structure in a vertically slidable manner. Is restrained.

According to the vibration damping device 20 according to the second embodiment as described above, the vibration damping device 20 can be accommodated in a narrow place and can be made compact with a three-dimensional damping effect.

FIG. 15 shows a third embodiment of the present invention.
As shown in FIG. 16 to FIG. 16, the beam 24 of the building 10 may be provided with a vertical damping device.

A weight (mass) 25 for damping vibration is supported on the side wall of the beam 24 by a column 26 and a spring 27 so as to be slidable in the vertical direction, and the functional fluid 5 is arbitrarily multiplexed at the center of the weight 25. A voltage corresponding to the vibration level is applied to the functional fluid 5 by the sensor 18a and the control unit 19a which are stacked and attached to the beam 24 to change the shear stress and absorb the vibration energy.

As a fourth embodiment of the present invention, although not shown, permanent magnets are arranged around the horizontal damping device 1 and the vertical damping device 2 and the like, and a magnetic field is applied to the functional fluid 5.

When a magnetic field is applied to the functional fluid 5, FIG.
As shown in FIG. 7, when a voltage is applied to the shear stress a caused by a magnetic field having a certain density, a voltage effect is applied, and the shear stress b
However, in reality, the shear stress c is caused by a synergistic effect due to the simultaneous application of the magnetic field and the electric field.

As a result, the shear stress can be greatly changed with a small voltage, which is not only a countermeasure for small energy but also a minimum magnetic field generated by the permanent magnet in the functional fluid 5 at the time of power failure. Since it is in the applied state,
In the vibration damping device, a shear resistance against a small vibration is exhibited and energy can be absorbed.

[0043]

As described above, the vibration damping device according to the present invention is a damping device for damping the vibration of a structure due to a disturbance. A horizontal attenuating means formed by stacking a functional fluid in the gap via a packing while being laminated to a thickness, and the cylindrical electrode walls of each other sandwiched between the cylindrical electrode walls of the other party. A pair of bottomed multi-cylinder electrode members having concentrically arranged electrode walls so as to be mounted are fitted in a vertically opposed manner, and a functional fluid is packed in a gap between adjacent cylindrical electrode walls by packing. Vertical damping means, which is formed by sealing, exhibits damping action in three directions of three-dimensional space, and is excellent in that the entire device is reduced in size to a stacked state, compact, and easy to handle. It has the effect.

Since the packing is formed of a rubber packing and a Teflon packing, and the rubber packing is disposed inside the Teflon packing, the functional fluid leaks to the outside due to the deformation of the damping means. Without sliding out, the sliding of the sliding contact surface can be favorably maintained by the Teflon-based packing.

Further, a vertical damping means may be provided so as to surround the horizontal damping means, or a horizontal damping means may be provided above and below the vertical damping means. The arrangement has a superior effect of contributing to downsizing of the vibration damping device.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of a vibration damping device according to the present invention.

FIG. 2 is a front view of a part of the horizontal damping device of the first embodiment.

FIG. 3 is an enlarged view of a portion B of the horizontal damping device according to the first embodiment.

FIG. 4 is a plan view of the horizontal damping device according to the first embodiment.

FIG. 5 is a partial longitudinal sectional view of the vertical damping device according to the first embodiment.

FIG. 6 is an enlarged view of a portion D of the vertical damping device.

FIG. 7 is a cross-sectional view of a part of the vertical damping device, taken along line CC of FIG. 5;

FIG. 8 is a sectional view taken along line AA in FIG. 1;

FIG. 9 is a partially enlarged sectional view of the vibration damping device according to the first embodiment.

FIG. 10 is a control block diagram of the vibration damping device according to the first embodiment.

FIG. 11 is a control flowchart (a), (b), and (c) of the vibration damping device according to the first embodiment.

FIG. 12 is a front view of a vibration damping device according to a second embodiment.

FIG. 13 is a sectional view taken along line EE in FIG.

FIG. 14 is a sectional view taken along line FF in FIG. 12;

FIG. 15 is a perspective view illustrating a configuration of a vibration damping device according to a third embodiment.

FIG. 16 is a plan view of the vibration damping device according to the third embodiment.

FIG. 17 is a characteristic curve diagram showing shear stress when an electric field and a magnetic field are simultaneously applied to a functional fluid.

[Explanation of symbols]

 Reference Signs List 1 horizontal damping device, 1b adjustment plate, 2 vertical damping device, 3 electrode plate, 4,8 packing, 4a, 8a Teflon packing, 4b, 8b rubber packing, 5 functional fluid, 6,7 bottomed multi-cylinder electrode member with bottom, 6p, 7p base plate, 9a, 9b, ... through-hole, 10 building, 11 base, 12, 20 vibration damping device, 13 support, 14 plate, 15, 16 Teflon sheet, 17 laminated rubber, 18, 18a sensor , 19, 19a control part, 21 holding arm, 22 concave part, 23 convex part, 24 beam, 25 weight, 26 support, 27 spring.

Claims (5)

(57) [Claims] 1. An attenuating device for attenuating vibration of a structure due to a disturbance, wherein a flat electrode plate is horizontally laminated with an arbitrary thickness with a gap, and a functional fluid is packed in the gap. And a pair of attenuating means for the horizontal direction formed by being sealed via a pair of electrodes arranged concentrically so that the respective cylindrical electrode walls are sandwiched between the other cylindrical electrode walls. The bottomed multi-cylinder electrode member is vertically opposed to and fitted in the vertical direction, and a vertical damping means formed by sealing a functional fluid with a packing in a gap between adjacent cylindrical electrode walls, A vibration damping device comprising: 2. The vibration damping device according to claim 1, wherein the packing is formed of a rubber-based packing and a Teflon-based packing, and the rubber-based packing is disposed inside the Teflon-based packing. . 3. The device according to claim 2, wherein the Teflon-based packing is fixed with an adhesive on one side of the surfaces which are sandwiched and abutted by the electrode plate and the cylindrical electrode wall, respectively. Vibration damping device. 4. The vibration damping device according to claim 1, wherein a vertical damping device is provided so as to surround the horizontal damping device. 5. The vibration damping device according to claim 1, wherein horizontal damping means are provided above and below the vertical damping means.