JP4591242B2 - Vibration energy absorber - Google Patents

Description

  The present invention absorbs vibration energy in order to quickly attenuate vibrations generated in structures such as apartment buildings such as apartments, office buildings, detached houses, bridges, or seismic isolation structures obtained by isolating this structure. The present invention relates to a vibration energy absorbing device and a structure including such a device.

  As this type of vibration energy absorbing device (damper), there are known a viscous damper, a friction damper, a lead damper, a steel rod damper, etc., and such a vibration energy absorbing device returns the seismic isolation structure to the initial position. For example, it is applied to a structure together with a spring device.

Japanese Patent Laid-Open No. 2003-287079 Nakata, Iemura, Igarashi, “Pseudo negative stiffness-added semi-active vibration control experiment of full-scale connected structure”, Proc. -163 Ionaga, Igarashi, Suzuki, “Real-time hybrid experiment on application of MR damper to quasi-negative stiffness semi-active control”, Japan Earthquake Engineering Society / Conference 2003 Summary, p268-269

  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 in addition to the restoring force of the spring device is isolated during vibration. Since the seismic isolation structure is subjected to a large force because it is loaded on the structure, the rigidity of the part that receives the resistance force of the vibration energy absorbing device and the restoring force of the spring device must be increased. .

  On the other hand, a viscous damper having negative rigidity has been proposed. However, the proposed viscous damper adjusts the opening degree of a valve in a bypass pipe connecting two cylinders by an external command. In many cases, when the power failure occurs due to the electrical adjustment of the valve opening and the external command, the viscous damper may not perform the intended operation with negative rigidity. There is.

  The present invention has been made in view of the above points, and the object of the present invention is to determine the rigidity of a structure that receives a resistance force or a part of a seismic isolation structure that receives a resistance force and a restoring force of a return means. A vibration energy absorbing device having negative rigidity that can perform a desired operation even if a power failure occurs and that can be configured in a small size without requiring an occupied space, and the vibration energy absorbing device are provided. To provide a structure.

  The vibration energy absorbing device according to the present invention includes a container that contains a liquid, a compartment member that divides the container body into two chambers and that is movable with respect to the container, and is fixed to the compartment member and includes the container body. A vibration transmitting member that penetrates, a communication means that has an orifice and communicates the one chamber and the other chamber through the orifice, and a first port that communicates with the one chamber in the container. A second port that communicates with the other chamber in the body, a third port that communicates with one chamber within the containing body via one one-way valve and one orifice arranged in parallel with the one-way valve. And a control valve having a fourth port communicating with the other one-way valve in the other chamber of the container and the other orifice arranged in parallel with the other one-way valve. And the control valve An axially movable valve 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 the moving position of the relative movement of the partition members Have a body.

  According to the vibration energy absorbing device of the present invention, since the communication of the first and second ports is controlled by the valve body according to the displacement of the partition member in addition to the communication means, the negative rigidity is reduced. As a result of being able to appear, when the vibration energy absorbing device is used for, for example, a seismic isolation structure via a vibration transmission member, a structure that receives a resistance force or a base isolation structure that receives a resistance force and a restoring force of a return means It is not necessary to increase the rigidity of the part of the object, and it is possible to perform a desired operation even when a power failure occurs. In addition, it can be configured in a small size without requiring an occupied space.

  In the present invention, the control valve includes a communication passage communicated with the first port and the second port, and one valve seat member communicated with the third port and movable in one direction in the axial direction. One pressure receiving chamber divided into two chambers by the other, and the other pressure receiving chamber divided into two chambers by the other valve seat member communicated with the fourth port and movable in the other direction in the axial direction, One elastic means for elastically urging one valve seat member in the other direction in the axial direction, and another elastic means for elastically urging the other valve seat member in one direction in the axial direction In this case, the valve body is arranged in the communication path and opens and closes the communication path, and is connected to the main control valve body and one of the pressure receiving chambers. In the through hole of one of the valve seat members so as to receive the fluid pressure of the other chamber. One control valve body seated on one valve seat member, and a through hole of the other valve seat member connected to the main control valve body and receiving the fluid pressure of one chamber of the other pressure receiving chamber And the other control valve body seated on the other valve seat member.

  The control valve according to the present invention includes a first to a fourth port, a communication path, both pressure receiving chambers and a valve housing that accommodates a 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 may be provided. In this case, one valve seat member The pressure receiving chamber is divided into two chambers, and one valve seat body having a through hole opened in two chambers of one pressure receiving chamber, and reduction of the other of the two chambers of one pressure receiving chamber to a certain degree or more The other valve seat is provided between the one fixed plate and the one valve seat body and one blocking portion provided integrally with the valve seat body. The member divides the other pressure receiving chamber into two chambers and is divided into two chambers of the other pressure receiving chamber. The other fixed seat and the other valve seat main body so as to prevent the other chamber seat body having the opened through-hole and the other of the two pressure receiving chambers from being reduced more than a certain amount. The other valve seat body is provided integrally with the other blocking portion, and one control valve body is fixed to the main control valve body at one end and the other At the end, it is seated on the one valve seat body at the opening end of the through hole of one valve seat body, and penetrates one fixing plate so as to be slidable in the axial direction, and the other control valve body is The one end is fixed to the main control valve body, and the other end is seated on the other valve seat body at the opening end of the through hole of the other valve seat body, and the other fixing plate is slid in the axial direction. It should be penetrating freely.

  In the present invention, one elastic means may be 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. The two chambers of one pressure receiving chamber may be communicated with 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 may May be communicated with each other through a hole provided in the valve seat member or the other fixing plate, and the communication passage includes a central passage, one large-diameter passage communicated with the first port, and a first passage. The other large-diameter passage communicated with the second port and the central passage at one end and the one large-diameter passage at the other end and gradually expand from the central passage toward the one large-diameter passage. One diameter-expanded passage is communicated with the central passage at one end and the other large-diameter passage at the other end. And the other enlarged passage gradually increased in diameter from the central passage toward the other large-diameter passage. In this case, the main control valve body passes through the central passage. It is preferable that 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.

  In one preferred example of the invention, one one-way valve is adapted to allow fluid flow from one chamber in the containment to a third port, while the other one-way valve is provided in the containment. Fluid flow from the other chamber to the fourth port. In the present invention, 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 surfaces of the cylindrical portion, and the partition member is a cylinder of the cylindrical cylinder. The vibration transmitting member may include a piston rod fixed to the piston while movably penetrating each closed portion of the cylindrical cylinder.

  The structure of the present invention includes a seismic isolation structure, return means for returning the seismic isolation structure to an initial position, and the vibration energy absorbing device according to any one of the above aspects. Is connected to the base isolation structure so as to transmit the vibration of the base isolation structure to the partition member.

  In the structure of the present invention, the return means may include an elastic device interposed between the seismic isolation structure and the ground where the seismic isolation structure is installed. At least one of a rubber bearing and a coil spring may be provided.

  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. It is possible to provide a vibration energy absorbing device having a negative rigidity that can be operated and that can be configured in a small size without requiring an occupied space, and a structure including the same.

  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.

  In FIG. 1, the vibration energy absorbing device 1 of the present example includes a container 2 that contains a liquid such as oil, and the container 2 is divided into two chambers 3 and 4 and is also accommodated in the X direction (accommodated with respect to the container 2. 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. Communication means 8 for communicating the chamber 3 in the container 2 with the chamber 4, a port 10 communicating with the chamber 3 in the container 2 via the pipe 9, and a pipe 11 for connecting to the chamber 4 in the container 2 via the pipe 11. A port 12 communicated with each other, a port 15 communicated with a chamber 3 in the container 2 via a one-way valve 13 and an orifice 14 having a variable flow resistance arranged in parallel with the one-way valve 13, and the container 2 The one-way valve 16 and the channel resistance arranged in parallel with the one-way valve 16 in the chamber 4 And a control valve 19 having a port 18 which is communicated through the variable orifice 17.

  The container 2 includes a cylindrical cylinder 25 that stores the liquid A therein, and 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 within the cylindrical portion 26 of the cylindrical cylinder 25, and the vibration transmitting member 6 is capable of moving each closing portion 27 of the cylindrical cylinder 25 in the X direction. A piston rod 29 fixed to the piston 28 and an attachment 30 for connecting one end of the piston rod 29 to a seismic isolation structure 150 (see FIG. 11) such as a seismic isolation building. is doing.

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

  The one-way valve 13 has one end connected to the port 35 and the other end connected to the port 15 so as 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 that communicates, and allows the flow of the fluid A from the chamber 4 in the container 2 to the port 18 while prohibiting the flow of the fluid A in the opposite direction. Thus, one end is provided in the middle of the pipe 46 communicating with the port 36 and the other end with the port 18.

  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, and gives resistance according to the adjusted passage diameter to the fluid A flowing through the pipe 47. The orifice 17 provided in the middle of the pipe 48 is arranged in parallel to the one-way valve 16 via the pipe 48 so that the fluid A flowing through the pipe 48 is given resistance according to the adjusted passage diameter. It has become.

  In addition to the ports 10, 12, 15, 18, 41 and 42, the control valve 19 has ports 15 and 18 based on the movement direction and the movement position in the relative movement of the partition member 5 with respect to the container 2 in the X direction. A valve body 51 movable in the direction B (the axial direction of the control valve 19) for controlling the communication between the ports 10 and 12 by the fluid pressure supplied to the port 10, the communication passage 52 connected to the port 10 and the port 12, and the port 15 and a pressure receiving chamber 56 partitioned into two chambers 54 and 55 by a valve seat member 53 movable in the B direction, and a valve seat member 57 communicated with the port 18 and movable in the B direction. A pressure receiving chamber 60 partitioned into chambers 58 and 59; elastic means 61 comprising a coil spring that elastically biases the valve seat member 53 in the B1 direction in the B direction; and the valve seat member 57 in the B1 direction. There are provided elastic means 62 formed of a coil spring that is elastically biased in the opposite direction B2, the ports 10, 12, 15, 18, 41 and 42, the communication passage 52, and the pressure receiving chambers 56 and 60. A valve housing 63 that houses the valve body 51, valve seat members 53 and 57, and elastic means 61 and 62, and a hole 67 that is fixed to the valve housing 63 on the port 10 side and communicates the two chambers 54 and 55 with each other. And a fixing plate 65 fixed to the valve housing 63 on the port 12 side and provided with a hole 68 that allows the two chambers 58 and 59 to communicate with each other.

  The valve body 51 is arranged in the communication passage 52 and opens and closes the communication passage 52. The valve body 51 is connected to the main control valve body 75 and fluid in the chamber 54 of the pressure receiving 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 pressure, and a main control valve body 75 A cylindrical or rod-like shape that is connected 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 in the chamber 58 of the pressure receiving chamber 60. The control valve body 79 is provided.

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

  The valve seat member 53 divides the pressure receiving chamber 56 into chambers 54 and 55, and has a valve seat body 81 having a through hole 76 opened in the chambers 54 and 55 of the pressure receiving chamber 56, and prevents the chamber 55 from being reduced more than a certain amount. A cylindrical blocking portion 82 disposed between the fixed plate 64 and the valve seat main body 81 and abutting the fixed plate 64 at one end and integrally provided with the valve seat main body 81 at the other end. The blocking portion 82 has a plurality of through holes 83 that communicate with the inside and outside of the blocking portion 82.

  The valve seat member 57 divides the pressure receiving chamber 60 into chambers 58 and 59, and has a valve seat body 85 having a through hole 78 opened in the chambers 58 and 59 of the pressure receiving chamber 60, and prevents the chamber 59 from being reduced beyond a certain level. A cylindrical blocking portion 86 disposed between the fixed plate 65 and the valve seat main body 85 and abutting the fixed plate 65 at one end and integrally provided with the valve seat main body 85 at the other end. The blocking portion 86 has a plurality of through holes 87 communicating between the inside and the outside.

  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 penetrates the valve seat body 85 at the other end of the truncated cone shape. The valve 78 is seated on the valve seat body 85 at the opening end of the hole 78 and penetrates the fixing plate 65 slidably in the B direction.

  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, a central passage 91 at one end, and a large diameter passage at the other end. 92, and a diameter-enlarging passage 94 that gradually increases in diameter from the central passage 91 toward the large-diameter passage 92, and a central passage 91 at one end and a large-diameter passage 93 at the other end. And a diameter-enlarging passage 95 that gradually increases in diameter from the central passage 91 toward the large-diameter passage 93, and the main control valve body 75 includes an enlarged-diameter passage 94 via the central passage 91. The outer diameter of the central passage 91 is substantially the same as that of the central passage 91 so as to control the communication with the enlarged diameter passage 95.

  The elastic means 61 is positioned at one end thereof by a projection 96 of the valve seat body 81 and at the other end thereof at a recess 98 of the end face wall portion 97 of the valve housing 63, so that the end face wall portions of the valve seat body 81 and the valve housing 63 are positioned. The elastic means 62 is positioned at one end thereof by the protrusion 99 of the valve seat body 85 and at the other end thereof by the recess 101 of the end face wall portion 100 of the valve housing 63, respectively. It is arranged between the main body 85 and the end face wall portion 100 of the valve housing 63.

  The valve housing 63 includes a central portion 111 having the communication passage 52 and the ports 10, 12, 41, and 42. The valve housing 63 is fixed to one end surface of the central portion 111 with a screw 112. A lid portion 113 having a portion 97, a lid portion 115 having a pressure receiving chamber 60, a port 18, and an end surface wall portion 100 and being fixed to the other end surface of the central portion 111 by a screw 114. Consists of the body.

  In the vibration energy absorbing device 1, each pipe, each port, the communication path 52, 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 on the ground 152 via a roller 153 that can roll in a horizontal direction H with respect to the ground 152 including the foundation. While the vibration transmission member 6 is connected to the installed seismic isolation structure 150 side via the fixture 30, the container 2 is used while being fixed to the ground 151 side. The return means for returning the seismic 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 seismic isolation structure 150 is installed. The coil spring 154 having the elastic modulus K expands and contracts in the vibration of the seismic isolation structure 150 in the horizontal direction H due to the earthquake, and when the earthquake stops, the base isolation structure 150 is restored to its initial position before the vibration ( It is made to return by elastic force. When the vibration transmitting member 6 is connected to the seismic isolation structure 150 side via the fixture 30, no vibration is generated in the seismic isolation structure 150 and the seismic isolation structure 150 is returned to the initial position by the coil spring 154 and is stopped. In this state, the piston 28 is positioned substantially at the center of the cylindrical portion 26 in the X direction as shown in FIG.

  In this state, when the seismic isolation structure 150 is vibrated in the horizontal direction H by the earthquake and the piston 28 is first moved in the X direction in the X direction as shown in FIG. While the liquid A is increased in pressure, the liquid A in the chamber 3 is depressurized. As a result, the liquid A in the chamber 4 flows toward the chamber 3 through the orifice 7 and the pressure increase in the liquid A in the chamber 4 is mainly one. The liquid A in the chamber 58 is also increased in pressure by being transmitted to the chamber 58 through the directional valve 16, while the reduced pressure of the liquid A in the chamber 3 is transmitted to the chamber 54 through the orifice 14 and the liquid A in the chamber 54 is Similarly, the pressure is reduced. Even if the piston 28 is moved to the vicinity of the maximum displacement position (D = + Max) in the first movement of the piston 28 in the X1 direction, the main control valve body 75 is moved in the B2 direction until the central passage 91 is opened. Accordingly, the vibration energy absorbing device 1 moves the piston rod 29 in the X1 direction from the substantially central position (D = 0) of the cylindrical portion 26 to the vicinity of the maximum displacement position (D = + Max) of the piston 28 in the X1 direction. Then, the reaction force (resistance) R indicated by the curve 121 in FIG. 10 based on the orifice 7 is applied to the piston rod 29.

  Further, when the piston 28 is moved from the vicinity of the maximum displacement position (D = + Max) in the X1 direction to the maximum displacement position (D = + Max), the pressure of the liquid A in the chamber 58 is increased and the pressure of the liquid A in the chamber 54 is decreased. Then, 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 the control valve body 79 is moved from the valve seat body 85 as shown in FIGS. The main control valve body 75 moves away from the central passage 91 and is positioned on the large-diameter passage 92 side through the enlarged-diameter passage 94, and the central passage 91 is opened to open the central passage 91, the enlarged-diameter passage 94, and the like. As a result, the large-diameter passage 92 and the large-diameter passage 93 communicate with each other through 95, and the flow of the liquid A in the chamber 4 toward the chamber 3 is performed via the central passage 91 instead of the orifice 7. The energy absorbing device 1 is the X1 of the piston 28. In the maximum displacement position of the direction (D = + Max), it will give the reaction force R of approximately zero to the piston rod 29. 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.

  After the piston 28 is moved to the maximum displacement position (D = + Max) in the X1 direction, when the piston 28 starts to move in the X2 direction, which is the opposite direction to the X1 direction in the X direction, this time, the liquid A in the chamber 3 As a result, the pressure of the liquid A in the chamber 54 via the one-way valve 13 and the pressure reduction of the liquid A in the chamber 58 via the orifice 17 are mainly reduced. 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. 91, the communication between the large-diameter passage 92 and the large-diameter passage 93 through the enlarged-diameter passages 94 and 95 is blocked, and the flow of the liquid A in the chamber 3 toward the chamber 4 is again performed through the orifice 7 instead of the central passage 91. As a result, vibration energy When the piston 28 moves in the X2 direction from the maximum displacement position (D = + Max) in the X1 direction of the piston 28, the reaction force R indicated by the curve 122 in FIG. . In the movement of the valve seat member 53 in the B1 direction, the liquid A is led from the chamber 55 to the large diameter passage 92 through the hole 67.

  Even if the piston 28 is moved from the maximum displacement position (D = + Max) of the piston 28 in the X1 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. Thus, 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 is substantially the same as the cylindrical portion 26 from the maximum displacement position (D = + Max) in the X1 direction. When the piston rod 29 moves in the X2 direction to the vicinity of the central position (D = 0), the reaction force (resistance) R indicated by the curve 122 of FIG.

  When the piston 28 continues to move further in the X2 direction from the substantially central position (D = 0) of the cylindrical portion 26, the valve body 51 and the pressure are 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 valve seat member 57 is largely moved in the B1 direction along with the expansion of the elastic means 61 and the contraction of the elastic means 62, so that the control valve body 77 moves away from the valve seat body 81 and the main control valve as shown in FIGS. The body 75 deviates from the central passage 91 and is positioned on the large-diameter passage 93 side through the enlarged-diameter passage 95. As a result of the communication with the diameter passage 93 and the flow of the liquid A in the chamber 3 toward the chamber 4 through the central passage 91 instead of the orifice 7, the vibration energy absorbing device 1 can move the piston 28 in the X2 direction. X2 direction from the approximate center position (D = 0) The movement will give a reaction force R of substantially zero as indicated by the straight line 123 of FIG. 10 according to the central passage 91 in 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.

  As shown in FIG. 8, after the piston 28 reaches the maximum displacement position (D = −Max) in the X2 direction by moving in the X2 direction from the substantially central position (D = 0) of the cylindrical portion 26, the maximum displacement position (D = −). When the movement in the X1 direction starts again from Max), the pressure of the liquid A in the chamber 4 is increased, while the liquid A in the chamber 3 is depressurized. As a result, the pressure increase of the liquid A in the chamber 58 mainly via the one-way valve 16 And the pressure reduction of the liquid A in the chamber 54 via the orifice 14 causes the valve body 51 and the valve seat member 57 to move in the B2 direction, and the main control valve body 75 is returned to the central passage 91 again as shown in FIGS. 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 4 toward the chamber 3 is performed. Is made via the orifice 7 again instead of the central passage 91. As a result, when the vibration energy absorbing device 1 moves in the X1 direction from the maximum displacement position (D = −Max) of the piston 28 in the X2 direction, the reaction force R indicated by the curve 124 in FIG. Will give. In the movement of the valve seat member 57 in the B2 direction, the liquid A is led from the chamber 59 through the hole 68 to the large diameter passage 93.

  When the piston 28 is continuously moved in the X1 direction from the substantially central position (D = 0) of the cylindrical portion 26, the valve body 51 and the pressure increase of the liquid A in the chamber 58 and the pressure reduction of the liquid A in the chamber 54 are performed. Contrary to the above, the valve seat member 53 is largely moved again in the B2 direction with the contraction of the elastic means 61 and the expansion of the elastic means 62, and the control valve body 79 is moved to the valve seat body 85 as shown in FIGS. 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, and the central passage 91 is opened to pass through the central passage 91 and the enlarged diameter passages 94 and 95. As a result of communication between the large diameter passage 92 and the large diameter passage 93 and the flow of the liquid A in the chamber 4 toward the chamber 3 through the central passage 91 instead of the orifice 7, the vibration energy absorbing device 1 From the approximate center position (D = 0) of the piston 28 to X The direction of movement of, will provide a reaction force R of substantially zero as indicated by the straight line 125 of FIG. 10 according to the central passage 91 in the piston rod 29.

  After the piston 28 is moved again to the maximum displacement position (D = + Max) in the X1 direction, the above operation is repeated as long as the piston 28 vibrates in the X2 and X1 directions. The reaction force R including the damping loop indicated by the curve 122, the straight line 123, the curved line 124, and the straight line 125 shown in FIG. In the vibration energy absorbing device 1, the attenuation loop indicated by the curve 122, the straight line 123, the curved line 124, and the straight line 125 is reduced as the amplitude and speed of the vibration in the horizontal direction H due to the earthquake of the seismic isolation structure 150 are reduced. 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. When the vibration of the seismic isolation structure 150 is settled, the seismic isolation structure is restored by the restoring force of the coil spring 154. 150 is arranged at the initial position.

  By the way, during the vibration of the base isolation structure 150, the base isolation structure 150 has a restoration of the coil spring 154 as represented by the restoring force straight line 130 shown in FIG. 10 for each position D in the X direction of the piston 28. The force R and the reaction force R of the vibration energy absorbing device 1 are loaded, but 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. Therefore, the resultant force of the reaction force R of the vibration energy absorbing device 1 loaded on the seismic isolation structure 150 and the restoring force R of the coil spring becomes relatively small, and the seismic isolation structure 150 that receives these resultant forces becomes relatively small. It is not necessary to increase the rigidity.

  In addition, in the vibration energy absorbing device 1, the ports 10 and 12 are supplied 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 movement in the X direction. Since the control valve 19 having the valve body 51 movable in the B direction for controlling the communication of the valve is used, the target operation can be performed even if a power failure occurs, and the negative space is not required so much. It can be made compact with rigidity.

  The above 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 movable in the horizontal direction H with respect to the ground 152 via a sliding member or the like. It may be installed on the ground 152 so as to be, and further, for example, a seismic isolation structure which is seismically isolated with a laminated rubber bearing may be used. In this case, the coil spring 154 is omitted and an elastic device is provided. The laminated rubber support may have a return function, and the structure may be a structure that is not seismically isolated. In this case, the return means is separate from the structure. The structure itself may be provided with a return function without being provided. Further, the flow path resistance of the orifices 7, 14 and 17 is adjusted so that the seismic isolation structure or the structure which is not seismically isolated is added to the curve 131, the straight line 123, the curved line 132 and the straight line 125 or the curved line 133 and the straight line 123 of FIG. The optimum attenuation loop represented by the curve 134 and the straight line 125 may be obtained. The curve shown in FIG. 10 is a theoretical curve for explanation, and in reality, the curve 122 and the straight line 123 are connected without passing through the origin (= 0), and the curve 124 is shown. The same applies to the straight line 125 and the straight line 125.

  Instead of providing a hole 67 for communicating the two chambers 54 and 55 with the fixing plate 64 and a hole 68 for communicating the two chambers 58 and 59 with each other on the fixing plate 65, the hole 67 is formed in the valve seat body 81. The holes 68 may be provided in the valve seat body 85, respectively.

It is sectional explanatory drawing of a preferable example of embodiment of this invention. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is explanatory drawing of the example which used the example shown in FIG. 1 for a seismic isolation structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration energy absorption apparatus 2 Container 3, 4 Chamber 5 Compartment member 6 Vibration transmission member 7, 14, 17 Orifice 8 Communication means 10, 12, 15, 18 Port 13, 16 One-way valve 19 Control valve

Claims (10)

  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; a vibration transmission member that is fixed to the partition member and penetrates the container; and an orifice. And a communication means for communicating one chamber in the container with the other chamber through the orifice, a first port communicated with the one chamber in the container, and the other chamber in the container. A second port, a third port communicating with one chamber in the container through one orifice and one orifice arranged in parallel with the one-way valve, and the other chamber in the container; And a control valve having a fourth port communicating with the other one-way valve through the other orifice arranged in parallel with the other one-way valve. The relative movement of the partition member with respect to An axially movable valve body for controlling communication of the first and second ports by fluid pressure supplied to the third and fourth ports based on the moving direction and the moving position, and the first port, A communication passage communicated with the second port, one pressure receiving chamber defined by two valve chambers by one valve seat member communicated with the third port and movable in one direction in the axial direction; The other pressure receiving chamber is divided into two chambers by the other valve seat member communicated with the fourth port and movable in the other direction in the axial direction, and the one valve seat member in the other direction in the axial direction. One elastic means for elastically urging and the other elastic means for elastically urging the other valve seat member in one direction in the axial direction, and the valve body is disposed in the communication path. And a main control valve body that opens and closes the communication path and the main control valve And a control valve body seated on 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, and a main control The other control valve body seated on the other valve seat member in the through hole of the other valve seat member so as to be connected to the valve body and receive the fluid pressure of one chamber of the other pressure receiving chamber. A vibration energy absorbing device.   The control valve is provided with a first to fourth port, a communication passage, both pressure receiving chambers and a valve housing containing a valve body, both valve seat members and elastic means, and a valve housing on the first port side. One fixed plate fixed and the other fixed plate fixed to the valve housing on the second port side, and one valve seat member divides one pressure receiving chamber into two chambers In addition, one valve seat body having a through hole opened in two chambers of one pressure receiving chamber and one of the two chambers of one pressure receiving chamber, The blocking plate is disposed between the fixed plate and the one valve seat body and is provided integrally with the valve seat body, and the other valve seat member includes the other pressure receiving chamber. The other valve having a through hole that is divided into two chambers and opens in two chambers of the other pressure receiving chamber The other valve seat is arranged between the other fixing plate and the other valve seat body so as to prevent the main body and the other of the two pressure receiving chambers from shrinking beyond a certain level. 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. The other end seats on the other valve seat body at the open end of the through hole of the other valve seat body, and penetrates the other fixing plate so as to be slidable in the axial direction. The vibration energy absorbing device as described.   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. Vibration energy absorbing device.   Two chambers of one pressure receiving chamber are communicated with each other through a hole provided in one valve seat member or one fixing plate, and two chambers of the other pressure receiving chamber are connected to the other valve seat member or the other The vibration energy absorbing device according to claim 2 or 3, wherein the vibration energy absorbing device is in communication with each other through a hole provided in the fixed plate.   The communication passage 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 one large-diameter at the other end. One enlarged passage that is communicated with the passage and gradually increases in diameter from the central passage toward one large-diameter passage, and communicates with the central passage at one end and the other large-diameter passage at the other end. And the other enlarged passage gradually increased in diameter from the central passage toward the other large-diameter passage, and the main control valve body has one enlarged-diameter passage through the central passage. 5. The vibration energy absorbing device according to claim 1, wherein the vibration energy absorbing device has an outer diameter substantially the same as a diameter of the central passage so as to control communication between the first passage and the other enlarged passage.   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 provided from the other chamber in the container to the fourth port. The vibration energy absorbing device according to any one of claims 1 to 5, wherein a fluid flow to the fluid is allowed.   The container includes a cylindrical cylinder that stores liquid. The cylindrical cylinder includes a cylindrical portion and a closed portion that closes both end surfaces of the cylindrical portion, and the partition member is disposed in the cylindrical portion of the cylindrical cylinder. The vibration transmitting member includes a piston rod fixed to the piston and movably penetrating each closed portion of the cylindrical cylinder. The vibration energy absorbing device according to any one of 1 to 6.   A vibration isolating structure, return means for returning the seismic isolation structure to the initial position, and the vibration energy absorbing device according to any one of claims 1 to 7, wherein the vibration transmitting member A structure that is connected to the seismic isolation structure so that the vibration of the seismic structure is transmitted to the partition member.   The structure according to claim 8, wherein the return means includes an elastic device interposed between the base isolation structure and the ground where the base isolation structure is installed.   The structure according to claim 9, wherein the elastic device includes at least one of a laminated rubber support and a coil spring.

Images