KR102009790B1 - MR Actuator and Seismic Equipment Using the Same - Google Patents

Abstract

The present invention relates to an MR oscillator and a seismic isolator using the same, which includes a housing, an MR module accommodated in the housing, a rod passing through the housing and the MR module in a lateral direction.
The present invention also has orifices with different diameters of inlet and outlet ports between the paths of MR fluid movement.
According to the present invention, there is an advantage in attenuating the seismic motion of a seismic isolator that is sensitive to horizontal seismic motion, for example, a seismic isolator having a height higher than that of a floor area.
In addition, there is an advantage to attenuate the seismic movement caused by the movement of the base seismic target equipment free than by the external force of the piston of the prior art.
In addition, there is an advantage to increase the damping force by adjusting the flow amount of the MR fluid using the orifice.

Description

MR oscillator and seismic isolator using it {MR Actuator and Seismic Equipment Using the Same}

The present invention relates to an isolating device, and more particularly, to an isolating device that can actively absorb and reduce the generated vibration by using the viscosity change of the MR fluid (Magneto Rheological Fluid).

In the event of an earthquake, earthquake-resistant design is being carried out when new buildings are constructed to protect the buildings from earthquakes. However, the seismic design is to suppress the vibration of the building and is not applied to the equipment in the building that can be damaged by the small vibration.

That is, even in a building with a seismic design, the information and communication equipment inside the building may be damaged by a slight impact.

In order to solve the above problems, a base isolation device having various functions has been developed, and there are two conventional techniques.

First is the LM Guide method. LM (Linear Movement) Guide is a device that moves a block linearly with a single point of contact point on a precisely processed straight rail. The larger the diameter of the ball, the greater the force and the higher the impact resistance. And it is mainly used for horizontal movement, and it is used for seismic isolation device by attaching spring to LM Guide because it is a device that makes sliding smooth.

The second method is to use a ball bearing, which includes a bolt transferer between the upper plate and the lower plate supporting the base isolation target equipment, and alleviates the shock as the upper plate moves in accordance with the rotation of the bolt transferr during an earthquake.

Recently, a method of forming a magnetic field around an MR fluid (Magneto Rheological Fluid) to reduce vibration by using a viscosity change of the MR fluid has been introduced.

MR fluid is a dispersion of ferromagnetic particles of several μm size in an electrically insulating liquid such as silicone oil. In response to an applied magnetic field, the particles dense with each other to form a chain-like cluster, and the viscosity caused by the flow resistance. Changes can be reversibly controlled in units of a few milliseconds, and due to the excellent nature of pressure control in this process, the application ranges from simple dampers to space structures.

Patent document 1 uses a change in viscosity of the conventional MR fluid, referring to this, the prior art is provided in the housing, a piston installed inside the housing, one end of the piston is projected to the outside of the housing to fix the seismic isolation target equipment It is provided with a rod, and the clearance between the inner wall of the housing and the side of the piston is increased so that the housing and the piston do not come into contact even when a lateral load is applied to the MR damper.

However, the prior art as described above has the following problems.

First, the prior art is prepared for vertical seismic movement in the up and down direction to the base equipment, and is an effective technique for preventing horizontal seismic movement in the left and right directions. That is, it is not suitable for a base isolation target device sensitive to horizontal seismic motion, for example, a base isolation target device having a high height compared to the floor area.

Second, the prior art has a structure in which the rod receives the force of the seismic isolator when the earthquake motion occurs and connects it to the piston. The piston inside the cylinder is subjected to the resistance of the MR fluid, but the seismic motion of the seismic isolator is reduced, but at the same time, the seismic isolation is caused by the MR fluid. The reduction effect is weak because movement of target equipment is not free.

Third, since the diameter of the MR fluid flow path is constant, the flow of MR fluid is not changed due to the lowering of the piston.

(Patent Document 1) KR10-1239989 B1

The present invention is to solve the conventional problems as described above, an object of the present invention is an MR oscillator having a housing, an MR module accommodated inside the housing, a rod sliding through the housing and the MR module in the transverse direction And to provide a base isolation device using the same.

In another aspect, the present invention provides an MR oscillator having an orifice installed in the flow path of the MR fluid, having an orifice having a different diameter of the outer and inner holes, and a seismic isolator using the same.

In order to achieve the object of the present invention as described above, the MR oscillator according to the present invention, in the seismic isolator using an MR oscillator, the MR oscillator, the housing; An MR module spaced apart from the left side of the housing by a predetermined distance, and a right side of the MR module accommodated in the housing by being spaced apart from the right side of the housing by a predetermined distance; And a rod sliding through the housing and the MR module in a lateral direction. The MR module includes: a case; A coil is installed and a magnetic field generating unit accommodated in the case; A central chamber located between the inner circumferential surface of the case and the coil and filled with an LM fluid; A left chamber coupled to the left and right sides of the case, the left lid having an orifice, and a right lid; positioned between the left side of the housing and the left lid and having a LM fluid filled therein; Located between the right side of the housing and the right lid and the right chamber is filled with LM fluid; and the left chamber is in communication with the central chamber of the MR module through the orifice of the left lid, the central chamber of the right lid It is characterized by communicating with the right chamber through the orifice.

In the MR oscillator according to the present invention, the diameter of the outer hole of the left lid orifice is larger than the diameter of the inner hole, and the diameter of the outer hole of the right lid orifice is larger than the diameter of the inner hole.

In the MR oscillator according to the present invention, the rod and the lower plate are in contact with each other, and a damper is provided around the rod.

In order to achieve the object of the present invention as described above, the seismic isolator according to the present invention comprises a top plate for supporting the seismic isolation target equipment; Bottom plate installed on the floor; MR side of the upper side is located on the lower side of the upper plate, the lower side is located at a predetermined distance from the lower plate; Sensor unit for detecting the vibration; And a controller configured to control the magnetic field generated by the coil by receiving the earthquake information sensed by the sensor unit, wherein the MR vibrator includes: a housing; An MR module spaced apart from the left side of the housing by a predetermined distance, and a right side of the MR module accommodated in the housing by being spaced apart from the right side of the housing by a predetermined distance; And a rod sliding through the housing and the MR module in a lateral direction and fixed to a side of the lower plate, wherein the MR module includes: a case; A coil is installed and a magnetic field generating unit accommodated in the case; A central chamber located between the inner circumferential surface of the case and the coil and filled with an LM fluid; A left chamber coupled to the left and right sides of the case, the left lid having an orifice, and a right lid; positioned between the left side of the housing and the left lid and having a LM fluid filled therein; Located between the right side of the housing and the right lid and the right chamber is filled with LM fluid; and the left chamber is in communication with the central chamber of the MR module through the orifice of the left lid, the central chamber of the right lid It is characterized by communicating with the right chamber through the orifice.

In the seismic isolator according to the present invention, the MR oscillator operates as a lower MR oscillator having a lower housing and a lower rod; Located in the lower side of the upper plate, the upper MR and positioned in the vertical direction with the upper MR housing further comprising an upper housing, the upper rod; The upper rod of the upper MR oscillator is fixed to the side of the upper plate, and the lower side of the upper housing has a groove in the same direction as the upper rod, and wraps around the lower side of the upper housing and is fitted into the groove, in the same direction as the groove. Sliding along the groove when the earthquake movement occurs, and located above the lower housing, characterized in that it comprises a bracket for connecting the upper MR oscillator and the lower MR oscillator.

According to the present invention, an MR oscillator having a housing, an MR module accommodated in the housing, a rod sliding through the housing and the MR module in a transverse direction, and an isolating apparatus using the same are the seismic isolating target devices sensitive to horizontal seismic movement, eg For example, it is effective to reduce the earthquake movement of the base isolation target device having a height higher than the floor area.

In addition, according to the present invention, since the housing of the MR oscillator moves from side to side with the rod as the axis, it is effective to reduce seismic movement caused by the movement of the base isolation target equipment more freely than by the external force of the piston.

In addition, an orifice having a different diameter between the inlet and the outlet is provided between the flow paths of the MR fluid, and is effective in reducing seismic motion by controlling the flow amount of the MR fluid.

1 is a block diagram of a base isolation device according to the present invention.
2 is a perspective view of an MR oscillator according to the present invention.
3 is an exploded view of an MR module.
Figure 4 is an explanatory diagram showing the operation of the MR oscillator during the earthquake.
5 is a cross-sectional view of an orifice according to the present invention.
6 is a second embodiment according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, the seismic isolator 1000 according to the present invention includes an MR oscillator 100, an upper plate 200 which is in contact with an upper side of the MR oscillator 100, and an MR oscillator 100. The rod 130 is provided with a lower plate 300 fixed to the side, and the sensor unit 400 for detecting earthquake movement, the earthquake information (for example, the magnitude of the earthquake, earthquake direction) detected by the sensor unit 400 The control unit 500 for controlling the magnetic field of the MR oscillator 100 is provided.

The MR oscillator 100 is spaced apart from the lower plate 300 by a predetermined distance and the housing 110 moves along the rod 130 when an earthquake occurs. The rod is preferably made of special steel to withstand the load of the seismic isolating equipment, it is preferable that the special processing. Thus, in the present invention, it is designed to withstand a load of 100 kg per rod.

On the other hand, in order to keep the base isolation equipment in parallel and to distribute the weight load, the apparatus as shown in Figure 1 is connected in parallel.

Referring to FIG. 2, the MR oscillator 100 according to the present invention includes a housing 110, an MR module 120 accommodated in the housing, a transverse direction of the housing 110, and the MR module 120. It consists of a rod 130 that slides through.

Between the left side of the MR module 120 and the left side of the housing 110, a left chamber 111, a right chamber 112 is disposed between the right side of the MR module 120 and the right side of the housing 110. It is provided.

The left chamber 111 and the right chamber 112 are filled with MR fluid.

Referring to FIG. 3, the MR module 120 according to the present invention includes a cylindrical case 121 and is accommodated in the case 121 and includes a magnetic field generator 122 having a coil 128 installed around the case. The left side of the case 121 is provided with a left lid 123 and a right side with a right lid 124.

A hole 125 is provided at the centers of the left lid 123 and the right lid 124, and the rod 130 penetrates through the hole 125, and the coil 128 is disposed inside the rod 130. A cable (not shown) for introducing a current to magnetize is introduced.

The left and right outer periphery of the case 121 is in contact with the housing 110.

The left lid 123, the right lid 124 is provided with an orifice 126 in the circumferential direction on the outside.

The position of the orifice 126 is indicated by the dotted arrow (a) of FIG. 3, the MR fluid of the left chamber 111 is the center of the MR module 120 through the orifice 126 of the left lid 123. The central chamber 129 communicates with the chamber 129, and the central chamber 129 communicates with the right chamber 112 through the orifice 126 of the right lid 124, as indicated by the dashed arrow b.

MR oscillator 100 and the seismic isolator using the same according to the present invention configured as described above operates as follows.

The upper side of the MR oscillator 100 is in contact with the lower portion of the upper surface of the seismic isolator 200, both ends of the rod 130 penetrating the MR oscillator 100 in the transverse direction, the side of the lower plate 300 of the seismic isolation device It is fixed at. An operation process will be described with reference to FIGS. 3 to 5 when the horizontal vibration in the left and right directions occurs in this state.

4 (a) is a view before an earthquake occurs.

MR fluid is filled in the left chamber 111, the central chamber 129, and the right chamber 112, and the MR fluid flows between the chambers.

Figure 4 (b) is a horizontal earthquake occurred, the initial vibration is the case acting to the left.

When the earthquake occurs, the upper plate 200 supporting the base equipment to be moved to the left. In addition, the housing 110 coupled to the top plate 200 is also moved to the left side.

When an earthquake occurs, the upper plate 200 has a large movement, and the lower plate 300 has a relatively small movement compared to the upper plate 200. And the rod 130 of the MR oscillator 100 is fixed to the lower plate 300 side and the housing 110 and the rod 300 is slidingly coupled.

Therefore, when the earthquake occurs, the rod 130 is hardly moved, and the housing 110 of the MR oscillator 100 moves to the left using the rod 130 as an axis. In addition, in case the earthquake movement is large and the housing 110 moves to the lower plate 300 side and collides with the lower side 200, the rod 130 is damped around the rod 130 at a portion in contact with the lower plate 300 side. It is provided.

As described above, the housing 110 of the present invention is effective in reducing seismic movement since the rod 130 moves more freely with the base equipment to be subjected to the earthquake.

On the other hand, the MR fluid in the left chamber 111 flows to the central chamber 129 through the orifice 126 of the left cover 123 of the MR module 120. And it flows to the right chamber 112 through the orifice 126 of the right lid 124.

As described above, the housing 110 of the MR oscillator 100 is subjected to resistance by the MR fluid moving in the direction opposite to the moving direction of the upper plate 200. Let the resistance be called Ff-Force fluid.

On the other hand, by varying the diameter of the inner hole and the outer hole of the orifice 126, it is possible to effectively obtain the resistance due to the flow of the MR fluid will be described with reference to FIG.

MR fluid (F) stayed in the left chamber 111 flows to the central chamber 129 through the orifice 126 of the left lid 123 when the earthquake occurs, the diameter of the inner hole (126-2) of the orifice (126) Since it is smaller than the diameter of the outer hole 126-1, it flows with greater resistance than the same diameter. In other words, the damping force of the earthquake motion is strengthened.

In addition, the MR fluid F of the central chamber 129 flows through the orifice 126 of the right lid 124. The diameter of the outer hole 126-3 is larger than that of the inner hole 126-4. When the diameter flows more quickly to empty the space of the central chamber 129, the fluid in the left chamber 111 continues to flow in the direction of the right chamber 111.

In addition, the orifices 126 are partially uniformly disposed, and a predetermined distance from the orifice groups arranged uniformly is preferable to prevent excessive flow of the MR fluid to the central chamber 129.

Meanwhile, the sensor unit 400 attached to the seismic isolator detects the magnitude and direction of the generated earthquake and transmits the related information to the control unit 500 at the moment the earthquake occurs. The control unit 500 receiving the related information controls a current having a proper size to flow through the cable (not shown) and the coil 128 to generate a magnetic field in the MR module 120.

The MR fluid F of the left chamber 111, the central chamber 129, and the right chamber 112 is changed to a semisolid by the magnetic field generated as described above. As such, the resistance due to the change in viscosity of the MR fluid F is referred to as magnetization resistance (Fm-Force megnetic).

As such, when the housing 110 moves to the left, the damping force is received by the fluid resistance force Ff and the magnetization resistance force Fm.

On the other hand, when the control unit 500 changes the magnitude of the current at regular time intervals, the magnitude of the magnetic field by the coil 128 is changed, and thus the viscosity of the MR fluid F is changed. In other words, the MR fluid (F) alternates between the liquid and semi-solid state.

Therefore, the housing 110 may minimize the impact caused by the earthquake by receiving the resistance in the opposite direction to the movement at several times.

On the other hand, the present invention can configure a custom MR oscillator suitable for the equipment to be isolated by varying the interval between the orifice 126, the length of the rod 130, the number of coils 128, the MR fluid (F).

FIG. 6 is a second embodiment of the present invention, and the MR oscillator 100 can reduce the earthquake motion in the front-rear direction as well as the left and right by this configuration.

If one MR oscillator 100 is installed as shown in FIG. 1, the seismic isolator 1000 may reduce seismic motion only in horizontal earthquakes in the left and right directions. However, as shown in FIG. 6, when two MR oscillators 100 are provided and the two are provided in a cross shape (+), seismic movement can be reduced not only in the horizontal direction but also in the front and rear directions.

In order to achieve the above function, the present isolation device includes two MR oscillators 100, which is composed of an upper MR oscillator 100u and a lower MR oscillator 100d.

The upper MR oscillator 100u includes an upper housing 110u and an upper rod 130u, and the lower MR oscillator 100d includes a lower housing 110d and a lower rod 130d. .

The upper MR oscillator 100u is in contact with the lower side of the upper plate 200, and the upper rod 130u is fixed to the side of the upper plate 200.

The lower side of the upper housing 110u is provided with a groove 114 in the same direction as the upper rod 130u.

The lower MR oscillator 100d is positioned perpendicular to the lower MR oscillator 100u and is spaced apart from the lower plate 300 by a predetermined distance.

The lower rod 130d is fixed to the side of the lower plate 300.

Since the directions of the upper MR oscillator 100u and the lower MR oscillator 100d are vertical, the directions of the upper rod 130u and the lower rod 130d are also perpendicular.

And a bracket 115 positioned between the upper MR oscillator 100u and the lower MR oscillator 100d to connect two MR oscillators, the bracket 115 being below the upper housing 110u. It is coupled to the upper MR oscillator (100u) in the form of being wrapped in the groove 114, coupled to the lower MR oscillator (100d) in the form located on the upper side of the lower housing (110D).

Meanwhile, the clamp 115 fitted into the groove 114 is designed to slide in the groove 114 when an earthquake occurs in the same direction as the groove 114.

First, how to operate the earthquake movement (arrow a) in the left and right directions.

When the earthquake movement in the left and right directions, the upper housing 110u moves to the left and right by using the upper rod (130u) as an axis, and when the earthquake movement occurs, the clamp 115 slides in the groove 114 and is fixed to the lower plate 300 by the rod. The lower housing 110d is not moved.

Now, we explain how to operate the earthquake movement (arrow b) in the forward and backward directions.

When the earthquake movement in the left and right directions occurs, the lower housing 110d moves forward and backward with the lower rod 130d as an axis, and the angle 115 does not slide because the movement direction is perpendicular to the direction of the groove 114. . As a result, both the upper MR oscillator 100u and the upper plate 200 move in the same direction as the lower housing 100d.

MR oscillator according to the present invention described above and the seismic isolator using the same is not limited to the above embodiment, and those skilled in the art without departing from the gist of the technology claimed in the following claims To the extent that anyone can change and carry out the technical spirit.

1000: isolation device
100: MR oscillator 100u: upper MR oscillator
100d: bottom MR oscillator
110: housing
110u: Upper housing 110d: Upper housing
111: left chamber
112: right chamber
120: MR module 121: case
122: magnetic field generating unit 123: left cover
124: right lid 125: hole
126: orifice
126-1, 126-3: outer hole 126-2, 126-4: inner hole
128: coil 129: central chamber
130: rod 130u: upper rod
130d: lower rod
200: top plate 300: bottom plate
400: sensor unit 500: control unit

Claims (5)

In a base isolation device using an MR oscillator,
The MR oscillator 100,
A housing 110;
The left side is spaced a certain distance from the left side of the housing 110,
The right side is spaced a predetermined distance from the right side of the housing 110
MR module 120 accommodated in the housing 110;
And; a rod 130 sliding through the housing 110 and the MR module 120 in a lateral direction.
The MR module 120,
Case 121;
A coil 128 is installed and a magnetic field generator 122 accommodated in the case 121;
A central chamber 129 located between the inner circumferential surface of the case 121 and the coil 128 and filled with LM fluid;
It is coupled to the left and right sides of the case 121, the left lid 123 having an orifice 126, the right lid 124; includes,
Located between the left side of the housing 110 and the left lid 123, the left chamber 111 is filled with LM fluid;
It is located between the right side of the housing 110 and the right lid 124, the right chamber 112 is filled with LM fluid; and includes
The left chamber 111 communicates with the central chamber 129 of the MR module 120 through the orifice 126 of the left lid 123, and the central chamber 129 is an orifice of the right lid 124. In communication with the right chamber 112 through 126,
The diameter of the outer hole 126-1 of the left lid 123 orifice 126 is larger than the diameter of the inner hole 126-2, and the outer hole 126-3 of the orifice 126 of the right lid 124. MR diameter is larger than the diameter of the inner hole (126-4). delete The method of claim 1,
MR rod, characterized in that the damper is provided around the rod 130 in the contact portion of the rod 130 and the lower plate (300). In the seismic isolation device,
Top plate 200 for supporting the base equipment;
A lower plate 300 installed on the bottom;
MR side of the upper side is located on the lower side of the upper plate 200, the lower side is spaced apart a predetermined distance from the lower plate 300;
Sensor unit 400 for detecting the vibration;
And a control unit 500 which receives the earthquake information sensed by the sensor unit 400 and controls the magnetic field generated by the coil 128.
The MR oscillator 100
A housing 110;
The left side is spaced a certain distance from the left side of the housing 110,
The right side is spaced a predetermined distance from the right side of the housing 110
MR module 120 accommodated in the housing 110;
And a rod 130 sliding through the housing 110 and the MR module 120 in a lateral direction and fixed to the side of the lower plate 300.
The MR module 120,
Case 121;
A coil 128 is installed and a magnetic field generator 122 accommodated in the case 121;
A central chamber 129 located between the inner circumferential surface of the case 121 and the coil 128 and filled with LM fluid;
It is coupled to the left and right sides of the case 121, the left lid 123 having an orifice 126, the right lid 124; includes,
Located between the left side of the housing 110 and the left lid 123, the left chamber 111 is filled with LM fluid;
It is located between the right side of the housing 110 and the right lid 124, the right chamber 112 is filled with LM fluid; and includes
The left chamber 111 communicates with the central chamber 129 of the MR module 120 through the orifice 126 of the left lid 123, and the central chamber 129 is an orifice of the right lid 124. In communication with the right chamber 112 through 126,
The diameter of the outer hole 126-1 of the left lid 123 orifice 126 is larger than the diameter of the inner hole 126-2, and the outer hole 126-3 of the orifice 126 of the right lid 124. Isolation device is characterized in that the larger than the diameter of the inner hole (126-4). The method of claim 4, wherein
The MR oscillator (100) operates as a lower MR oscillator (100d) having a lower housing (110d) and a lower rod (130d);
Located on the lower side of the upper plate 200, and is provided in the vertical direction with the lower MR oscillator (100d) further comprises an upper MR oscillator (100u) including an upper housing (110u), the upper rod (130u);
The upper rod 130u of the upper MR oscillator 100u is fixed to the side of the upper plate 200,
The lower side of the upper housing (110u) has a groove 114 in the same direction as the upper rod (130u),
The lower housing 110u is wrapped around the lower side of the upper housing 114 so as to slide along the groove 114 when an earthquake movement occurs in the same direction as the groove 114, and is located above the lower housing 110d. A seismic isolator characterized in that it comprises a bracket (115) connecting the MR oscillator (100u) and the lower MR oscillator (100d).

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