WO2008072324A1

WO2008072324A1 - Vibration energy absorbing device

Info

Publication number: WO2008072324A1
Application number: PCT/JP2006/324878
Authority: WO
Inventors: Ikuo Shimoda; Osamu Kochiyama
Original assignee: Oiles Corporation
Priority date: 2006-12-13
Filing date: 2006-12-13
Publication date: 2008-06-19

Abstract

A vibration energy absorbing device and a structure with the vibration energy absorbing device. The vibration energy absorbing device does not require any particular increase in the rigidity of that portion of a structure that receives resistance force, can achieve aimed operation even in electric power failure, does not occupy much space, and is reduced in size. The vibration energy absorbing device (1) has a receiving body (2) for receiving liquid, a partitioning member (5) for partitioning the inside of the receiving body into two rooms (3, 4) and movable in the X direction relative to the receiving body, a vibration transmission member (6) secured to the partitioning member and penetrating through the receiving body, communication means (8) having an orifice (7) that has variable flow path resistance and interconnecting the two rooms in the receiving body via the orifice, and a control valve (19) having ports (10, 12, 15, 18).

Description

Specification

Vibration energy absorber

Technical field

[0001] The present invention is a method for quickly attenuating vibrations that occur in structures such as apartment buildings such as condominiums, office buildings, detached houses, bridges, or seismically isolated structures that are seismically isolated. More particularly, the present invention relates to a vibration energy absorbing device that absorbs vibration energy and a structure including such a device.

Background art

[0002] As this type of vibration energy absorber (damper), there are known viscous dampers, friction dampers, lead dampers, steel bar dampers, etc., and such vibration energy absorbers are used for seismic isolation structures. It is applied to the structure together with a spring device, for example, to return to the initial position.

[0003] Patent Document 1: Japanese Patent Laid-Open No. 2003-287079

Non-Patent Document 1: Nakada, Iemura, Igarashi, `` Pseudo negative stiffness-added semi-active vibration control experiment of full-scale connected structure '', Proceedings of the 56th Annual Scientific Lecture, Japan Society of Civil Engineers October 2013, pl62—163

Non-Patent Document 2: Ionaga, Igarashi, Suzuki, “Real-time hybrid experiment on application of MR damper to pseudo-negative stiffness semi-active control”, Japan Earthquake Engineering Society · Conference 2003 Abstracts p268-269

Disclosure of the invention

Problems to be solved by the invention

By the way, when a vibration energy absorbing device such as a viscous damper or a friction damper is applied to a structure such as a seismic isolation structure together with a spring device, the resistance force of the vibration energy absorbing device is added to the restoring force of the spring device during vibration. As a result, the seismic isolation structure receives a large force, which increases the rigidity of the part that receives the resistance force of the vibration energy absorbing device and the restoring force of the spring device. I have to do it.

[0005] On the other hand, a viscous damper having negative rigidity has been proposed, but the proposed viscous damper adjusts the opening of a valve in a bypass pipe connecting two cylinders by an external command. However, in many cases, viscous dampers are used when a power failure occurs due to electrical adjustment of the opening of the nozzle and external commands. There is a possibility that the intended operation may not be performed with negative rigidity.

[0006] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to provide a structure that receives a resistance force or a part of a base-isolated structure that receives a resistance force and a restoring force of a return means. There is no need to increase the rigidity of the vibration energy absorption device, and it can perform the desired operation even if a power failure occurs, and the vibration energy absorption device has a negative rigidity that can be configured in a small size without requiring much space. And providing a structure including the same.

Means for solving the problem

[0007] The vibration energy absorbing device of the present invention includes a container that contains a liquid, a partition member that divides the container into two chambers and is movable with respect to the container, and is fixed to the partition member so that V, And a vibration transmitting member penetrating the container, a communication means having an orifice and communicating one chamber and the other chamber through the orifice, and one chamber of the container. A first port, a second port communicating with the other chamber in the container, a one-way valve in one chamber in the container and one orifice arranged in parallel with the one-way valve. A third port communicated via the other chamber and a fourth port communicated with the other chamber in the container via the other one-way valve and the other orifice arranged in parallel with the other one-way valve. Control valve, and the control valve The communication of the first and second ports is controlled by the fluid pressure supplied to the third and fourth ports based on the moving direction and moving position of the partition member relative to the container. It has a valve body that is movable in the axial direction.

[0008] According to the vibration energy absorbing device of the present invention, the communication of the first and second ports is controlled by the valve body in accordance with the displacement of the partition member in addition to the communication means! Therefore, as a result of exhibiting negative rigidity, when the vibration energy absorbing device is used for, for example, a seismic isolation structure via a vibration transmission member, the structure receiving resistance force or the restoring force and restoring means It is not necessary to increase the rigidity of the part of the seismic isolation structure that receives the force, and the desired operation can be performed even if a power failure occurs, and it can be configured in a small size without requiring much space. [0009] In the present invention, the control valve communicates with the first port and the second port, communicates with the third port, and in the axial direction. One pressure receiving chamber divided into two chambers by one movable valve seat member and the other valve seat member which is communicated with the fourth port and which is movable in the other direction in the axial direction The other pressure receiving chamber partitioned into two chambers by one, and one valve seat member is axially biased in the other direction, and one elastic means and the other valve seat member are axially biased in the other direction. In this case, the valve element is arranged in the communication path and opens and closes the communication path, and the main control valve element opens and closes the communication path. A through hole in one valve seat member is connected to the main control valve body and receives fluid pressure in one chamber of one pressure receiving chamber. In this case, the one control valve body seated on the one valve seat member and the other control valve body are connected to the main control valve body and receive the fluid pressure in one chamber of the other pressure receiving chamber. The other control valve body seated on the other valve seat member may be provided in the through hole of the seat member.

The control valve according to the present invention includes a first to fourth port, a communication path, and both pressure receiving chambers, and a valve housing that houses a valve body, both valve seat members, and elastic means, One fixing plate fixed to the valve housing on the port side of the second port, and the other fixing plate fixed to the valve housing on the second port side may be provided. In this case, one valve seat member divides one pressure receiving chamber into two chambers and has one valve seat body having a through hole opened in two chambers of one pressure receiving chamber and two chambers of one pressure receiving chamber. One blocking plate disposed between the one fixed plate and the one valve seat body and integrally provided in the valve seat body so as to prevent the other chamber from being reduced more than a certain amount. The other valve seat member divides the other pressure receiving chamber into two chambers and the other receiving member. The other valve seat body having a through-hole opened in the two chambers of the chamber and the other fixing plate and the other of the other pressure-receiving chamber so as to prevent the other chamber from being reduced more than a certain degree. The control valve body is disposed between the valve seat body and the other blocking portion provided integrally with the other valve seat body. One control valve body is fixed to the main control valve body at one end. The other end is seated on the one valve seat body at the open end of the through hole of one valve seat body, and passes through one fixed plate so as to be slidable in the axial direction. The other control valve body at one end Is fixed to the main control valve body, and at the other end is seated on the other valve seat body at the open end of the through hole of the other valve seat body, and the other fixing plate is slidable in the axial direction. It is good to penetrate through.

In the present invention, one elastic means may be arranged between one valve seat main body and the valve housing, and the other elastic means may be arranged between the other valve seat main body and the valve housing. The two pressure-receiving chambers, which may be disposed, are connected to the other two pressure-receiving chambers, which may be connected to each other via holes provided in one valve seat member or one fixing plate. The communication passage which may be communicated with each other through a hole provided in the other valve seat member or the other fixing plate has a central passage and one large diameter communicated with the first port. A passage, the other large-diameter passage communicated with the second port, a central passage at one end, and a large-diameter passage at the other end, respectively, and from the central passage toward one large-diameter passage. One diameter-expanded passage, which is gradually expanded as the force is applied, and the central passage at one end and the other large-diameter passage at the other end In this case, the main control valve body may be provided with a central passage force and the other enlarged passage which is gradually enlarged in diameter toward the other large-diameter passage. The outer diameter is substantially the same as the diameter of the central passage so as to control the communication between the one enlarged passage and the other enlarged passage through the passage.

[0012] In a preferred example of the present invention, one one-way valve is adapted to allow fluid flow from one chamber in the container to the third port, and the other one-way valve is The other chamber force in the container allows the fluid to flow to the fourth port. In the present invention, the container includes a cylindrical cylinder that stores the liquid, the cylindrical cylinder includes a cylindrical portion and a closed portion that closes both end faces of the cylindrical portion, and the partition member is a circular cylinder cylinder. Even if it has a piston arranged movably in the axial direction in the cylinder part, the vibration transmitting member may be provided with a piston rod fixedly attached to the piston while movably penetrating each closed part of the cylindrical cylinder. Good.

[0013] The structure of the present invention includes a base isolation structure, a return means for returning the base isolation structure to the initial position, and the vibration energy absorbing device according to any one of the above aspects. The vibration transmitting member is connected to the base isolation structure so as to transmit the vibration of the base isolation structure to the partition member. [0014] In the structure of the present invention, the return means may include an elastic device interposed between the base isolation structure and the ground where the base isolation structure is installed. May comprise at least one of a laminated rubber bearing and a coil spring.

The invention's effect

[0015] According to the present invention, it is not necessary to particularly increase the rigidity of the structure that receives the resistance force or the seismic isolation structure that receives the resistance force and the restoring force of the return means, and a power failure occurs. However, it is possible to provide a vibration energy absorbing device having negative rigidity and a structure including the same, which can perform a desired operation, and can be configured in a small size without requiring an occupied space.

Brief Description of Drawings

FIG. 1 is a cross-sectional explanatory diagram of a preferred example of an embodiment of the present invention.

2 is an operation explanatory diagram of the example shown in FIG.

3 is an operation explanatory diagram of the example shown in FIG.

4 is an operation explanatory diagram of the example shown in FIG.

FIG. 5 is an operation explanatory diagram of the example shown in FIG. 1.

6 is an operation explanatory diagram of the example shown in FIG.

FIG. 7 is an operation explanatory diagram of the example shown in FIG. 1.

FIG. 8 is an operation explanatory diagram of the example shown in FIG. 1.

FIG. 9 is an operation explanatory diagram of the example shown in FIG. 1.

10 is an operation explanatory diagram of the example shown in FIG.

FIG. 11 is an explanatory diagram of an example in which the example shown in FIG. 1 is used for a seismic isolation structure.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, the present invention and its embodiments will be described in more detail based on preferred examples shown in the drawings. The present invention is not limited to these examples.

Example

In FIG. 1, a vibration energy absorbing device 1 of this example includes a storage body 2 that stores a liquid such as oil, and the storage body 2 is partitioned into two chambers 3 and 4 and X against the storage body 2. Direction (accommodation A partition member 5 movable in the axial direction of the body 2, a vibration transmission member 6 fixed to the partition member 5 and penetrating the housing body 2, and an orifice 7 having a variable flow path resistance and through the orifice 7 Communication means 8 for communicating between chamber 3 and chamber 4 in container 2, port 10 communicating with chamber 3 in container 2 through pipe 9, and port 4 in chamber 2 through pipe 11 Port 12 connected to each other, chamber 15 in container 2, one-way valve 13, and port 15 communicated through variable flow resistance orifice 14 arranged in parallel to one-way valve 13 and container 2 The inner chamber 4 includes a one-way valve 16 and a control valve 19 having a port 18 communicated via an orifice 17 having a variable flow resistance arranged in parallel with the one-way valve 16.

The storage body 2 includes a cylindrical cylinder 25 that stores the liquid A therein. The cylindrical cylinder 25 includes a cylindrical portion 26 and a closed portion 27 that closes both end surfaces of the cylindrical portion 26. The partition member 5 includes a piston 28 that is movably disposed in the X direction in the cylindrical portion 26 of the cylindrical cylinder 25, and the vibration transmitting member 6 includes the closed portions 27 of the cylindrical cylinder 25. A piston rod 29 that penetrates in the direction of movement in the X direction and is fixed to the piston 28, and one end of the piston rod 29 are connected to a base isolation structure 150 such as a base isolation building (see Fig. 11). And fixture 30.

The cylindrical portion 26 includes a port 35 that communicates with the chamber 3 and is connected to one end of the pipe 9, and a port 36 that communicates with the chamber 4 and is connected to one end of the pipe 11.

The communication means 8 includes a pipe 43 in which the orifice 7 is disposed in the middle and one end of which communicates with the port 41 and the other end of which communicates with the port 42. As the communication means 8, instead of communicating the port 41 and the port 42 via the orifice 7, the orifice 7 is arranged in the middle so that the port 35 and the port 36 are directly communicated via the orifice 7. In this case, it is possible to attach one end of the pipe 43 directly to the port 35 and the other end to the port 36. In this case, it is not necessary to provide the port 41 and the port 42. The orifice 7 gives the fluid A flowing through the pipe 43 a resistance according to the adjusted passage diameter.

[0022] The one-way valve 13 has one end connected to the port 35 and the other end to allow the flow of the fluid A from the chamber 3 in the container 2 to the port 15 while prohibiting the reverse flow of the fluid A. The one-way valve 16 is provided in the middle of the pipe 45 communicating with the port 15, and the one-way valve 16 allows the flow of the fluid A from the chamber 4 in the container 2 to the port 18, while the flow of the fluid A is reversed. To ban The other end of the pipe 46 is connected to the port 36 and the other end is connected to the port 18.

[0023] The orifice 14 provided in the middle of the pipe 47 is arranged in parallel to the one-way valve 13 via the pipe 47 so that the fluid A flowing through the pipe 47 gives resistance according to the adjusted passage diameter. The orifice 17 provided in the middle of the pipe 48 is arranged in parallel to the one-way valve 16 through the pipe 48, and has a resistance according to the passage diameter adjusted to the fluid A flowing through the pipe 48. Give it! /

The control valve 19 is a port based on the movement direction and the movement position in the relative movement in the X direction of the partition member 5 with respect to the container 2 in addition to the ports 10, 12, 15, 18, 41 and 42. 1 Control of communication between ports 10 and 12 by fluid pressure supplied to 5 and 18 Valve body 51 movable in B direction (axial direction of control valve 19), communication connected to ports 10 and 12 A pressure receiving chamber 56 divided into two chambers 54 and 55 by a passage 52, a valve seat 53 that is communicated with the port 15 and movable in the B direction, and a valve that is communicated with the port 18 and movable in the B direction A pressure receiving chamber 60 divided into two chambers 58 and 59 by a seat member 57; an elastic means 61 that also has a coil spring force that biases the valve seat member 53 in the B1 direction in the B direction; and the valve seat member 57. Coil spring force that positively biases the B2 direction in the B direction, which is the opposite direction to the B1 direction. Elastic means 62, ports 10, 12, 15, 18, 41 and 42, communication passage 52 and pressure receiving chambers 56 and 60, and valve body 51, valve seat members 53 and 57, and elastic means 61 , 62, 62, a fixed plate 64 fixed to the valve housing 63 on the port 10 side and provided with a hole 67 communicating with the two chambers 54 and 55, and a valve on the port 12 side. A fixing plate 65 is provided which is fixed to the housing 63 and is provided with a hole 68 which allows the two chambers 58 and 59 to communicate with each other.

[0025] The valve body 51 is disposed in the communication path 52 and opens and closes the communication path 52. The valve body 51 is connected to the main control valve body 75 and is connected to the pressure control chamber 56. A cylindrical or rod-shaped control valve body 77 seated on the valve seat member 53 at a frustoconical end in the through-hole 76 of the valve seat member 53 so as to receive the fluid pressure of 54, and a main control It is connected to the valve body 75 and seated on the valve seat member 57 at the tip of the truncated cone shape in the through hole 78 of the valve seat member 57 so as to receive the fluid pressure of the chamber 58 of the pressure receiving chamber 60. Cylindrical or rod-shaped And a control valve body 79.

The main control valve element 75 has an outer diameter larger than the outer diameters of the control valve elements 77 and 79 and is usually located at the center of the communication path 52.

[0027] The valve seat member 53 includes a valve seat body 81 that divides the pressure receiving chamber 56 into chambers 54 and 55 and has a through hole 76 opened in the chambers 54 and 55 of the pressure receiving chamber 56, and a predetermined amount or more of the chamber 55. In order to prevent the reduction, the cylindrical plate is disposed between the fixing plate 64 and the valve seat body 81, and is in contact with the fixing plate 64 at one end and integrally provided with the valve seat body 81 at the other end. The blocking portion 82 includes a plurality of through holes 83 that communicate with the inside and outside of the blocking portion 82.

[0028] The valve seat member 57 includes a valve seat body 85 that divides the pressure receiving chamber 60 into chambers 58 and 59 and has a through-hole 78 opened in the chambers 58 and 59 of the pressure receiving chamber 60, and a predetermined amount or more of the chamber 59. In order to prevent the reduction, the cylindrical plate is arranged between the fixed plate 65 and the valve seat body 85, and is in contact with the fixed plate 65 at one end and integrally provided with the valve seat body 85 at the other end. The blocking portion 86 includes a plurality of through holes 87 that communicate with the inside and outside of the blocking portion 86.

The control valve body 77 is fixed to the main control valve body 75 at one end, and is seated on the valve seat body 81 at the open end of the through hole 76 of the valve seat body 81 at the other end of the truncated cone shape. The control valve body 79 is fixed to the main control valve body 75 at one end and the valve seat body at the other end of the frustoconical shape. It is seated on the valve seat body 85 at the open end of the through hole 78 of the 85 and penetrates the fixing plate 65 slidably in the B direction.

[0030] The communication passage 52 includes a central passage 91, a large diameter passage 92 communicated with the ports 10 and 41, a large diameter passage 93 communicated with the ports 12 and 42, and the central passage 91 at one end and the other end at the other end. The large-diameter passage 92 communicates with the large-diameter passage 92 and gradually increases in diameter from the central passage 91 to the large-diameter passage 92, and the central passage 91 at one end and the large-diameter passage 93 at the other end. The main control valve body 75 includes a central passage 91 and a diameter-increasing passage 95 that is gradually expanded from the central passage 91 to the large-diameter passage 93 in accordance with the direction of force. The diameter of the central passage 91 is substantially the same as the diameter of the central passage 91 so as to control the communication between the enlarged diameter passage 94 and the enlarged passage 95.

[0031] The elastic means 61 has a projection 96 of the valve seat body 81 at one end and a valve housing at the other end. 63, each of which is positioned in a recess 98 of the end face wall portion 97 of the groove 63 and is arranged between the valve seat body 81 and the end face wall portion 97 of the valve housing 63, and the elastic means 62 has a valve seat at one end thereof. The other end of the valve body 63 is positioned in the recess 101 of the end wall 100 of the valve housing 63 by the protrusion 99 of the main body 85, and is arranged between the valve seat main body 85 and the end wall 100 of the valve housing 63. .

[0032] The valve housing 63 includes a central portion 111 having a communication passage 52 and ports 10, 12, 41, and 42, and is fixed to one end surface of the central portion 111 with a screw 112, and includes a pressure receiving chamber 56, A lid portion 113 having a seat 15 and an end surface wall portion 97, and a lid portion 11 having a pressure receiving chamber 60, a port 18 and an end surface wall portion 100 fixed to the other end surface of the central portion 111 by a screw 114. 5 and a three-part physical strength.

In the vibration energy absorbing device 1, each pipe, each port, the communication path 52, and the pressure receiving chambers 56 and 60 are filled with the same liquid A as the liquid A stored in the container 2.

The above-described vibration energy absorbing device 1 has a structure 151 as shown in FIG. 11 through a roller 153 that can roll in a horizontal direction H with respect to the ground 152 including the foundation. The vibration transmitting member 6 is connected to the seismic isolation structure 150 installed on the 152 via the fixture 30, while the container 2 is used while being fixed to the ground 151 side. The return means for returning the base isolation structure 150 to the initial position includes an elastic device including a coil spring 154 interposed between the base isolation structure 150 and the ground 152 where the base isolation structure 150 is installed. The coil spring 154 with the elastic modulus K expands and contracts due to the vibration of the seismic isolation structure 150 in the horizontal direction H! / When the earthquake stops, the seismic isolation structure 150 is moved to the initial position before the vibration. It is designed to be restored by its restoring force (elastic force). When the vibration transmitting member 6 is connected to the seismic isolation structure 150 via the fixture 30, the seismic isolation structure 150 is not vibrated, and the seismic isolation structure 150 is returned to the initial position by the coil spring 154. In a stationary state, as shown in FIG. 1, the piston 28 is positioned in the approximate center of the cylindrical portion 26 in the X direction.

In this state, the seismic isolation structure 150 is vibrated in the horizontal direction H by the earthquake, and the piston 28 first moves in the X direction and then moves in the XI direction via the piston rod 29 as shown in FIG. As a result, the pressure in the liquid A in the chamber 4 is increased, while the liquid A in the chamber 3 is depressurized. As a result, the liquid A in the chamber 4 flows to the chamber 3 side through the orifice 7, and the liquid in the chamber 4 A pressure increase is mainly unidirectional Liquid A in chamber 58 is also increased in pressure through chamber 16 to valve 58, while the reduced pressure in liquid A in chamber 3 is transmitted to chamber 54 through orifice 14 and liquid A in chamber 54 is also the same. The pressure is reduced. Even if the piston 28 is moved to the vicinity of its maximum displacement position (D = + Max) in the first movement of the piston 28 in the XI direction, the main control valve body 75 moves in the B2 direction until the central passage 91 is opened. Therefore, the vibration energy absorbing device 1 is configured so that the force at the substantially central position (D = 0) of the cylindrical portion 26 is XI of the piston rod 29 up to the maximum displacement position (D = + Max) of the piston 28 in the XI direction. In the movement in the direction, the reaction force (resistance) R indicated by the curve 12 1 in FIG.

Furthermore, when the piston 28 is moved to the maximum displacement position (D = + Max) in the vicinity of the maximum displacement position (D = + Max) in the XI direction, the pressure increase of the liquid A in the chamber 58 and the chamber 54 are increased. When the pressure of the liquid A is reduced, the valve body 51 and the valve seat member 53 are moved in the B2 direction together with the expansion of the elastic means 62 and the contraction of the elastic means 61, and as shown in FIGS. 79 is separated from the valve seat body 85 and the main control valve body 75 is separated from the central passage 91 and is positioned on the large diameter passage 92 side via the enlarged diameter passage 94, so that the central passage 91 is opened and the central passage 91 is opened. The large diameter passage 92 and the large diameter passage 93 are communicated with each other through the passage 91 and the enlarged diameter passages 94 and 95, and the flow of the liquid A in the chamber 4 toward the chamber 3 side is performed through the central passage 91 instead of the orifice 7. As a result, the vibration energy absorbing device 1 applies a substantially zero reaction force R to the piston rod 29 at the maximum displacement position (D = + Max) of the piston 28 in the XI direction. It will be giving. In the movement of the valve seat member 53 in the B2 direction, the liquid A is introduced into the chamber 55 from the large diameter passage 92 through the hole 67, so that the chamber 55 does not become negative pressure.

[0037] After the piston 28 is moved to the maximum displacement position (D = + Max) in the XI direction, when the piston 28 is moved in the X direction and then in the X2 direction, which is the opposite direction to the XI direction, This time, liquid A in chamber 3 is increased while liquid A in chamber 4 is depressurized, resulting in an increase in the pressure of liquid A in chamber 54 via one-way valve 13 and the liquid in chamber 58 via orifice 17. Due to the pressure reduction of A, the valve body 51 and the valve seat member 57 are moved in the direction B1, which is the direction opposite to the direction B2, and the main control valve body 75 is positioned again in the central passage 91 as shown in FIG. The central passage 91 is closed, and the communication between the large diameter passage 92 and the large diameter passage 93 via the central passage 91 and the enlarged diameter passages 94 and 95 is blocked, and the flow of the liquid A in the chamber 3 to the chamber 4 side becomes the center. Orif again on behalf of passage 91 As a result, the vibration energy absorbing device 1 is shown as a curve 122 in FIG. 10 based on the orifice 7 when the piston 28 moves in the X2 direction from the maximum displacement position (D = + Max) of the piston XI in the X2 direction. The reaction force R is applied to the piston rod 29. In the movement of the valve seat member 53 in the B1 direction, the liquid A is led out from the chamber 55 to the large diameter passage 92 through the hole 67.

[0038] Even if the piston 28 is moved from the maximum displacement position (D = + Max) of the piston 28 in the XI direction to the vicinity of the substantially central position (D = 0) of the cylindrical portion 26 in the movement of the piston 28 in the X2 direction. As shown in FIG. 5, the main control valve body 75 is not moved in the B1 direction until the central passage 91 is opened.Therefore, the vibration energy absorbing device 1 has a maximum displacement position in the XI direction (D = + Max ) To the vicinity of the approximate center position (D = 0) of the cylindrical part 26 in the X2 direction, the reaction force (resistance) R shown by the curve 122 in FIG. Will be given to.

[0039] When the piston 28 is continuously moved in the X2 direction also at the substantially central position (D = 0) of the cylindrical portion 26, the pressure is increased by increasing the pressure of the liquid A in the chamber 54 and decreasing the pressure of the liquid A in the chamber 58. The body 51 and the valve seat member 57 are moved greatly in the direction B1 with the expansion of the elastic means 61 and the contraction of the elastic means 62, and the control valve body 77 moves away from the valve seat body 81 as shown in FIGS. At the same time, the main control valve body 75 deviates from the central passage 91 and is positioned on the large-diameter passage 93 side via the enlarged-diameter passage 95. As a result of the communication between the diameter passage 92 and the large diameter passage 93 and the flow of the liquid A in the chamber 3 to the chamber 4 side through the central passage 91 instead of the orifice 7, the vibration energy absorbing device 1 Piston 28 approximately center position (D = 0) force in the X2 direction When moving in the X2 direction, approximately zero reaction force indicated by the straight line 123 in FIG. R is given to the piston rod 29. In the movement of the valve seat member 57 in the B1 direction, the liquid A is introduced into the chamber 59 from the large diameter passage 93 through the hole 68, so that the chamber 59 does not become negative pressure.

[0040] As shown in Fig. 8, the force at the substantially central position (D = 0) of the cylindrical portion 26 also reaches the maximum displacement position (D = -Max) in the piston 28 force ¾2 direction by moving in the X2 direction, and then the maximum displacement position ( (D = -Max), the liquid A in the chamber 4 is increased in pressure while the liquid A in the chamber 4 is depressurized.As a result, the liquid in the chamber 58 mainly through the one-way valve 16 is increased. The valve body 51 and the valve seat member 57 are moved in the B2 direction by the pressure increase of A and the pressure reduction of the liquid A in the chamber 54 via the orifice 14. As shown in FIGS. 1 and 8, the main control valve body 75 is positioned again in the central passage 91, and the central passage 91 is closed and the large passage 92 and the large passage 92 through the enlarged passages 94 and 95 are large. As a result of the communication with the radial passage 93 being blocked and the flow of the liquid A in the chamber 4 to the chamber 3 side again through the orifice 7 instead of the central passage 91, the vibration energy absorbing device 1 When moving in the XI direction from the maximum displacement position (D = —Max) in the X2 direction, the reaction force R indicated by the curve 124 in FIG. In the movement of the valve seat member 57 in the B2 direction, the liquid A is led from the chamber 59 to the large diameter passage 93 through the hole 68.

[0041] When the force of the piston 28 at the substantially central position (D = 0) of the cylindrical portion 26 is further continuously moved in the XI direction, the valve is increased by increasing the pressure of the liquid A in the chamber 58 and decreasing the pressure of the liquid A in the chamber 54. Contrary to the above, the body 51 and the valve seat member 53 are largely moved again in the direction B2 along with the contraction of the elastic means 61 and the expansion of the elastic means 62, so that the control valve body 79 is moved as shown in FIGS. The main control valve body 75 moves away from the central passage 91 and is located on the large-diameter passage 92 side through the enlarged-diameter passage 94 while being separated from the valve seat body 85, and the central passage 91 is opened to the central passage 91 and the enlarged-diameter. As a result of communication between the large-diameter passage 92 and the large-diameter passage 93 through the passages 94 and 95, the flow of the liquid A in the chamber 4 to the chamber 3 side is performed through the central passage 91 instead of the orifice 7. The vibration energy absorbing device 1 has a substantially central position (D = 0) force of the piston 28 in the XI direction, and is substantially represented by a straight line 125 in FIG. Zero reaction force R is given to piston rod 29.

[0042] After the piston 28 is moved again to the maximum displacement position in the XI direction (D = + Max), the above operation is repeated until the piston 28 vibrates in the X2 and XI directions. The energy absorbing device 1 applies to the piston rod 29 a reaction force R that also has a damping loop force indicated by a curve 122, a straight line 123, a curve 124, and a straight line 125 shown in FIG. In the vibration energy absorbing device 1, the attenuation loop indicated by the curves 122, 123, 124, and 125 becomes smaller as the amplitude and speed of the vibration in the horizontal direction H due to the earthquake of the seismic isolation structure 150 decrease. Therefore, the damping indicated by the damping loop is applied to the vibration in the horizontal direction H caused by the earthquake of the seismic isolation structure 150, and when the vibration of the seismic isolation structure 150 is settled, the damping force of the coil spring 154 Seismic structure 150 is placed in the initial position.

[0043] By the way, during the vibration of the seismic isolation structure 150, the X For each position D in the direction, the restoring force R of the coil spring 1 54 and the reaction force R of the vibration energy absorber 1 as represented by the restoring force straight line 130 shown in FIG. 10 are loaded. However, since the vibration energy absorbing device 1 has a so-called negative rigidity with respect to the displacement of the position D of the base isolation structure 150, the vibration energy absorption device 1 loaded on the base isolation structure 150 The resultant force between the reaction force R and the restoring force R of the coil spring becomes relatively small, and the rigidity of the seismic isolation structure 150 that receives these resultant forces does not need to be particularly increased.

[0044] Power! In the vibration energy absorbing device 1, the ports 10 and 12 are driven by the fluid pressure supplied to the ports 15 and 18 based on the movement direction and the movement position of the partition member 5 relative to the container 2 in the X direction. Because the control valve 19 with the valve body 51 movable in the B direction is used, the desired operation can be performed even if a power failure occurs, and the force does not require much space. It can be made compact with negative rigidity.

[0045] The above is a force that is an example of the seismic isolation structure 150 that has been seismically isolated by the rollers 153. Instead, the seismic isolation structure 150 is placed in the horizontal direction H with respect to the ground 152 via a sliding member or the like. It can be installed on the ground 152 so that it can be moved, or it can be a seismic isolation structure that is seismically isolated with, for example, a laminated rubber bearing. In this case, the coil spring 154 is omitted. In addition, the laminated rubber support as an elastic device may have a return function, or the structure may be a structure that is not seismically isolated. The structure itself may be provided with a return function without being provided separately. In addition, the flow resistance of the orifices 7, 14 and 17 is adjusted so that the seismic isolation structure or the structure that is not seismic isolation is added to the curve 131, straight line 123, curved line 132 and straight line 125 or curved line 133, It is also possible to obtain an optimum damping loop as represented by 123, curve 134 and straight line 125. Note that the curve shown in FIG. 10 is a principle curve for explanation, and in fact, the curve 122 and the straight line 123 are connected without passing through the origin (= 0). The same applies to 124 and straight line 125.

[0046] Instead of providing the hole 67 in the fixed plate 64 for communicating the two chambers 54 and 55 with each other in the fixing plate 64 and the hole 68 for connecting the two chambers 58 and 59 in the fixing plate 65 with each other, the hole 67 is provided as a valve. A hole 68 may be provided in the valve seat body 85 in the seat body 81!

Claims

The scope of the claims

[1] A container for storing a liquid, a partition member that divides the container into two chambers and that is movable with respect to the container, and vibration transmission that is fixed to the partition member and penetrates the container A member, a communication means having an orifice and communicating the one chamber in the container and the other chamber through the orifice, a first port communicating with the one chamber in the container, and the other in the container A second port communicated with the first chamber, a third port communicated with one chamber in the housing through one one-way valve and one orifice arranged in parallel with the one-way valve; A control valve having a fourth port communicated with the other one-way valve and the other orifice arranged in parallel with the other one-way valve in the other chamber in the container; The control valve is relative to the compartment relative to the container. It has an axially movable valve body that controls the communication of the first and second ports by the fluid pressure supplied to the third and fourth ports based on the moving direction and moving position in movement. ! /, Ru Vibration energy absorber.

[2] The control valve communicates with the first port and the second port, and communicates with the third port! /, And in the axial direction! One pressure receiving chamber divided into two chambers by one valve seat member, and divided into two chambers by the other valve seat member communicating with the fourth port and movable in the other direction in the axial direction. The other pressure receiving chamber, the one valve seat member in the axial direction, one elastic means for inertially urging in the other direction, and the other valve seat member in the axial direction. The valve body is arranged in the communication passage and is connected to the main control valve body. The main control valve body opens and closes the communication passage. And the one valve seat member in the through hole of the one valve seat member so as to receive the fluid pressure of one chamber of the one pressure receiving chamber. One of the seated control valve bodies and the other of the other valve seat member are connected to the main control valve body and receive the fluid pressure of one chamber of the other pressure receiving chamber. The vibration energy absorbing device according to claim 1, further comprising: the other control valve body seated on the valve seat member.

[3] The control valve is provided with first to fourth ports, communication passages and both pressure receiving chambers, and a valve housing containing the valve body, both valve seat members and elastic means, and a first port side. One fixing plate fixed to the valve housing and the other fixing plate fixed to the valve housing on the second port side, and one valve seat member is connected to one pressure receiving chamber. One valve seat body having a through hole opened in two chambers of one pressure receiving chamber and the other of the two chambers of one pressure receiving chamber is prevented from being reduced more than a certain amount. As shown in the figure, it is provided between one fixed plate and one valve seat main body and one blocking portion provided integrally with the valve seat main body, and the other valve seat member is The other pressure-receiving chamber is divided into two chambers, and the other valve seat body having a through-hole opened in two chambers of the other pressure-receiving chamber and the other one of the two chambers of the other pressure-receiving chamber are constant. In order to prevent the above reduction, the other valve is disposed between the other fixing plate and the other valve seat body. And a control valve body fixed to the main control valve body at one end and a through hole of one valve seat body at the other end. It is seated on the one valve seat body at the open end and penetrates one fixed plate so as to be slidable in the axial direction, and the other control valve body is fixed to the main control valve body at one end. And at the other end, the other valve seat body is seated at the open end of the through hole of the other valve seat body, and the other fixing plate is slidably penetrated in the axial direction. 2. The vibration energy absorbing device according to 2.

[4] The one elastic means is disposed between one valve seat body and the valve housing, and the other elastic means is disposed between the other valve seat body and the valve housing. 4. The vibration energy absorbing device according to 3.

[5] Two chambers of one pressure receiving chamber are connected to each other through a hole provided in one valve seat member or one fixing plate, and the two chambers of the other pressure receiving chamber are connected to the other valve 5. The vibration energy absorbing device according to claim 3, wherein the vibration energy absorbing device is in communication with each other through a hole provided in the seat member or the other fixing plate.

[6] The communication path includes a central passage, one large diameter passage communicated with the first port, the other large diameter passage communicated with the second port, a central passage at one end and a central passage at the other end. One large-diameter passage is communicated with each other and the central passage force is gradually increased in diameter toward one large-diameter passage, one enlarged-diameter passage at one end, the central passage at one end, and the other large at the other end. The center passage force and the other large diameter passage gradually increase as they are communicated with each other. The main control valve body has a diameter substantially equal to the diameter of the central passage so as to control the communication between the one enlarged passage and the other enlarged passage through the central passage. 6. The vibration energy absorbing device according to claim 2, wherein the vibration energy absorbing devices have the same outer diameter.

[7] One one-way valve allows fluid flow from one chamber in the containment to the third port, and the other one-way valve provides the other chamber force in the containment. The vibration energy absorbing device according to any one of claims 1 to 6, wherein a fluid flow to the fourth port is allowed! /.

[8] The container includes a cylindrical cylinder that stores a liquid. The cylindrical cylinder includes a cylindrical portion and a closed portion that closes both end faces of the cylindrical portion. The partition member is a cylindrical cylinder. The cylinder is provided with a piston movably disposed in the axial direction, and the vibration transmitting member includes a piston rod that penetrates each closed portion of the cylindrical cylinder and is fixed to the piston. The vibration energy absorbing device according to any one of claims 1 to 7,

[9] A seismic isolation structure, a return means for returning the seismic isolation structure to the initial position, and the vibration energy absorbing device according to claim 1, wherein the vibration energy absorbing device according to claim 1 is provided. The transmission member is a structure that is connected to the base isolation structure so as to transmit the vibration of the base isolation structure to the partition member.

10. The structure according to claim 9, wherein the return means includes an elastic device interposed between the base isolation structure and the ground where the base isolation structure is installed.

11. The structure according to claim 10, wherein the elastic device includes at least one of a laminated rubber support and a coil spring.