Hydraulic inerter with adjustable inerter coefficient and working method thereof

Abstract

The hydraulic inerter with the adjustable inerter coefficient comprises a cylinder body, the interior of the cylinder body is divided into a main cylinder body and an auxiliary cylinder body through a wall face with a round hole, a piston block is arranged in the main cylinder body, and piston rods are coaxially and fixedly arranged on the two end sides of the piston block; the end of one piston rod penetrates into the auxiliary cylinder body through a round hole and is connected with the auxiliary cylinder body through a spring which is coaxially connected with the piston rod, the end of the other piston rod penetrates out of the main cylinder body to the outside, reserved holes are formed in the cylinder walls, on the two end sides of the piston block, of the main cylinder body, and the two reserved holes are communicated through a tubular channel. The tubular channel is composed of a straight pipe section, a spiral pipe section and a connecting pipe. According to the hydraulic inerter with the adjustable inerter coefficient, when the excitation is continuously small, the dynamic mass of the structure is reduced by reducing the inerter coefficient; when excitation is large, large inertia force is output to assist the structure in damping by increasing the inerter coefficient.

Description

Technical Field

[0001] The invention relates to a hydraulic inertia container with adjustable inertia coefficient and a working method thereof, and relates to the technical field of structural shock absorption. Background Art

[0002] An inertia chamber is a device related to acceleration. The inertia force it outputs is proportional to the acceleration. The coefficient before acceleration is called the inertia coefficient. Existing inertia chambers are implemented in a variety of forms, including rack and pinion type, ball screw type, etc. The common point is that the horizontal displacement between the two ends of the inertia chamber is converted to achieve the output of an inertia force greater than the actual gravity of the inertia chamber. Among them, the fluid inertia chamber outputs the inertia force by converting the horizontal movement between the two ends into the flow of liquid along the tubular channel. However, the existing fluid inertia chamber can only output a fixed inertia force and cannot achieve the adjustable inertia coefficient. The disadvantage of an inertia chamber with a fixed inertia coefficient is that, especially under the action of an earthquake, the external excitation to the structure changes randomly. When the excitation is continuously small, the existing inertia chamber with a fixed inertia coefficient continues to output an inertia force of constant size, which increases the dynamic mass of the structure. At this time, the acceleration response and displacement response of the structure are small, and no excessive inertia force is required to assist in shock absorption.

[0003] In order to solve the above technical problems, the present application provides a hydraulic inertia container with an adjustable inertia coefficient. When the excitation is continuously small, the inertia coefficient is reduced, thereby reducing the dynamic mass of the structure; when the excitation is large, the inertia coefficient is increased to output a larger inertia force to assist the structure in shock absorption.

[0004] It can be seen that the hydraulic inertia container with adjustable inertia coefficient can enhance the shock absorption performance of the structure, and can also be applied to the shock absorption device, while reducing the mass of the shock absorption device, taking advantage of the adjustable inertia coefficient to improve the performance of the shock absorption device. In addition, the hydraulic inertia container with adjustable inertia coefficient is not only simple in structure and low in manufacturing cost, but also easy to arrange, and can be used in high-rise buildings, bridges, machinery and other fields. Summary of the invention

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a hydraulic inertia container with adjustable inertia coefficient and a working method thereof.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: a hydraulic inertia container with an adjustable inertia coefficient, including a cylinder body, the interior of the cylinder body is divided into a main cylinder body and a sub-cylinder body by a wall with a circular hole, a piston block is arranged inside the main cylinder body, piston rods are coaxially fixed on both ends of the piston block, and one end of the piston rod penetrates into the interior of the sub-cylinder body through the circular hole and is connected to the sub-cylinder body through a coaxially connected spring, and the other end of the piston rod penetrates out of the main cylinder body to the outside, and reserved holes are arranged on the cylinder wall of the main cylinder body on both ends of the piston block, and the two reserved holes are connected through a tubular channel, and the tubular channel is composed of a straight pipe section, a spiral pipe section, and a connecting pipe.

[0007] Preferably, the outer diameter of the piston block is the same as the inner diameter of the master cylinder.

[0008] Preferably, the axial direction of the straight pipe section is parallel to the axial direction of the spiral pipe section, and the straight pipe section is located at a position where the central axis of the spiral pipe section deviates from a spiral radius.

[0009] Preferably, the inner diameters of the cross sections of the straight pipe section and the spiral pipe section are equal, and the interiors of the tubes at the intersection nodes of the two tubes are connected, so that when the liquid flows in the tubular channel, it can flow through both the straight pipe section and the spiral pipe section.

[0010] Preferably, the two ends of the straight pipe segment are respectively connected to the two ends of the spiral pipe segment, that is, the starting point of the straight pipe segment is the same as and connected to the starting point of the spiral pipe segment, and the end point of the straight pipe segment is the same as and connected to the end point of the spiral pipe segment.

[0011] Preferably, there are two connecting pipes, one end of which connects the straight pipe section and the starting point of the spiral pipe section, and the other end is connected to a reserved hole, and the other end of which connects the straight pipe section and the end point of the spiral pipe section, and the other end is connected to another reserved hole, so as to facilitate the internally encapsulated liquid to flow smoothly in the enclosed space surrounded by the main cylinder body and the tubular channel.

[0012] Preferably, the wall surface is welded to the inside of the cylinder.

[0013] Preferably, one end of the spring is fixed to the corresponding piston rod, and the other end is fixed to the secondary cylinder body.

[0014] Preferably, a sealing member is provided between the circular hole and the corresponding piston rod.

[0015] A working method of a hydraulic inertia container with adjustable inertia coefficient is carried out according to the following steps: S1: When the two end points of the hydraulic inertia container with adjustable inertia coefficient are acted upon by external forces, the piston block moves horizontally axially, and the piston block squeezes the liquid in the main cylinder into the tubular channel, thereby driving the liquid to flow in the closed space formed by the main cylinder and the tubular channel. This process converts the horizontal axial movement of the piston block into irregular flow of the liquid in the tubular channel. S2: When the external force decreases, the moving speed of the piston block decreases, the flow rate of the liquid in the main cylinder and the tubular channel decreases, and the number of spiral tube sections that the liquid flows through in the tubular channel decreases. At this time, the flow length of the liquid in the tubular channel is reduced, the inertia coefficient of the inertia container is reduced, and the output inertial force is also reduced; when the flow rate cannot meet the highest point of a spiral tube section, the liquid flows back to the straight tube section along the original route, and flows back to the main cylinder from the end of the tubular channel; S3: When the external force increases, the moving speed of the piston block increases, the flow rate of the liquid in the main cylinder and the tubular channel increases, and the number of spiral tube sections that the liquid flows through in the tubular channel increases. At this time, the flow length of the liquid in the tubular channel increases, the inertia coefficient of the inertia container increases, and the output inertial force also increases. When the liquid flows through all the turns of the spiral tube section, the inertial force output by the inertia container reaches the maximum; at the same time, when the inertia container is working, a certain amount of energy loss will occur between the liquid and the inner wall of the tubular channel, the inner wall of the main cylinder, and the starting point and end point of the tubular channel, and the friction between the piston block and the inner wall of the main cylinder will participate in resisting the external force together.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the hydraulic inertia container with adjustable inertia coefficient reduces the dynamic mass of the structure by reducing the inertia coefficient when the excitation is continuously small; when the excitation is large, it increases the inertia coefficient and outputs a larger inertia force to assist the structure in shock absorption.

[0017] The hydraulic inertia container with adjustable inertia coefficient can enhance the shock absorption performance of the structure, and can also be applied to the shock absorption device, while reducing the mass of the shock absorption device, taking advantage of the adjustable inertia coefficient to improve the performance of the shock absorption device. In addition, the hydraulic inertia container with adjustable inertia coefficient is not only simple in structure and low in manufacturing cost, but also easy to arrange, and can be used in high-rise buildings, bridges, machinery and other fields.

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of an embodiment of the present invention.

[0020] Figure 2 It is a time history diagram of the top floor displacement response of the four-story frame structure installed with the present invention under the Qian An earthquake wave.

[0021] Figure 3 It is a time history diagram of the acceleration response of the top floor of the four-story frame structure installed with the present invention under the Qian An earthquake wave.

[0022] In the figure: wall 1, main cylinder body 2, auxiliary cylinder body 3, piston block 4, piston rod 5, spring 6, reserved hole 7, straight pipe section 8, spiral pipe section 9, connecting pipe 10. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] like Figures 1 to 3 As shown, this embodiment provides a hydraulic inertia container with adjustable inertia coefficient. After reasonable design, the inertia container can output an inertia force greater than its actual gravity, and at the same time, the inertia coefficient can be adjusted, thereby reducing the dynamic mass during the structural vibration process and enhancing the shock absorption performance of the structure. The hydraulic inertia container includes a cylinder body, the interior of the cylinder body is divided into a main cylinder body 2 and a sub-cylinder body 3 by a wall surface 1 with a circular hole, a piston block 4 is arranged inside the main cylinder body, and piston rods 5 are coaxially fixed on both ends of the piston block, and one end of the piston rod penetrates into the interior of the sub-cylinder body through the circular hole and is connected to the sub-cylinder body through a coaxially connected spring 6, and the other end of the piston rod penetrates out of the main cylinder body to the outside to be connected to the external shock-absorbing structure, and the cylinder wall of the main cylinder body on both ends of the piston block is provided with reserved holes 7, and the two reserved holes are connected through a tubular channel, and the tubular channel is composed of a straight pipe section 8, a spiral pipe section 9, and a connecting pipe 10.

[0027] Under the action of external force, the two ends of the inertial container are subjected to force, and the piston block is displaced. The movement of the piston block squeezes the liquid in the main cylinder into the tubular channel, that is, the horizontal movement of the piston block is converted into a complex flow of the liquid in the tubular channel, so as to achieve the output of an inertial force greater than the actual gravity of the inertial container. When the external force gradually increases from zero, the initial velocity of the liquid squeezed into the tubular channel is also gradually increasing, and the flow length in the tubular channel is also increasing, from the initial "connecting pipe-straight pipe section-connecting pipe" to "connecting pipe-straight pipe section and a circle of spiral pipe section-connecting pipe", and then to "connecting pipe-straight pipe section and all spiral pipe sections-connecting pipe". Since the size of the inertial force output by the inertial container is related to the flow length of the liquid in the tubular channel, the inertial force output by the inertial container can be adjusted according to the change of the flow length with the size of the external force.

[0028] In the embodiment of the present invention, the outer diameter of the piston block is the same as the inner diameter of the main cylinder.

[0029] In the embodiment of the present invention, the axial direction of the straight pipe section is parallel to the axial direction of the spiral pipe section, and the straight pipe section is located downwardly from the central axis of the spiral pipe section by a spiral radius.

[0030] In an embodiment of the present invention, the inner diameters of the cross sections of the straight pipe section and the spiral pipe section are equal, and the interiors of the pipes at the intersection nodes of the two pipes are connected, so that when the liquid flows in the tubular channel, it can flow through both the straight pipe section and the spiral pipe section.

[0031] In the embodiment of the present invention, the two ends of the straight pipe segment are respectively connected to the two ends of the spiral pipe segment, that is, the starting point of the straight pipe segment is the same as and connected to the starting point of the spiral pipe segment, and the end point of the straight pipe segment is the same as and connected to the end point of the spiral pipe segment.

[0032] In an embodiment of the present invention, there are two connecting pipes, one end of which connects the straight pipe section and the starting point of the spiral pipe section, and the other end is connected to a reserved hole; one end of the other connecting pipe connects the straight pipe section and the end point of the spiral pipe section, and the other end is connected to another reserved hole, so as to facilitate the internally encapsulated liquid to flow smoothly in the enclosed space surrounded by the main cylinder body and the tubular channel.

[0033] In an embodiment of the present invention, the wall surface is welded inside the cylinder body.

[0034] In the embodiment of the present invention, one end of the spring is fixed on the corresponding piston rod, and the other end is fixed on the auxiliary cylinder body. The spring is provided to ensure that the piston block can return to the initial position in time after displacement.

[0035] In an embodiment of the present invention, a sealing member is provided between the circular hole and the corresponding piston rod.

[0036] A working method of a hydraulic inertia container with adjustable inertia coefficient is carried out according to the following steps: S1: When the two end points of the hydraulic inertia container with adjustable inertia coefficient are acted upon by external forces, the piston block moves horizontally axially, and the piston block squeezes the liquid in the main cylinder into the tubular channel, thereby driving the liquid to flow in the closed space formed by the main cylinder and the tubular channel. This process converts the horizontal axial movement of the piston block into irregular flow of the liquid in the tubular channel. S2: When the external force decreases, the moving speed of the piston block decreases, the flow rate of the liquid in the main cylinder and the tubular channel decreases, and the number of spiral tube sections that the liquid flows through in the tubular channel decreases. At this time, the flow length of the liquid in the tubular channel is reduced, the inertia coefficient of the inertia container is reduced, and the output inertial force is also reduced; when the flow rate cannot meet the highest point of a spiral tube section, the liquid flows back to the straight tube section along the original route, and flows back to the main cylinder from the end of the tubular channel; S3: When the external force increases, the moving speed of the piston block increases, the flow rate of the liquid in the main cylinder and the tubular channel increases, and the number of spiral tube sections that the liquid flows through in the tubular channel increases. At this time, the flow length of the liquid in the tubular channel increases, the inertia coefficient of the inertia container increases, and the output inertial force also increases. When the liquid flows through all the turns of the spiral tube section, the inertial force output by the inertia container reaches the maximum; at the same time, when the inertia container is working, a certain amount of energy loss will occur between the liquid and the inner wall of the tubular channel, the inner wall of the main cylinder, and the starting point and end point of the tubular channel, and the friction between the piston block and the inner wall of the main cylinder will participate in resisting the external force together.

[0037] In order to simulate the actual shock absorption effect of the inertial container, a four-story frame structure model was established, and the inertial container was installed between the third and fourth floors. Figure 2 , Figure 3 It can be clearly seen that the inertia container has a good shock absorption effect.

[0038] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A hydraulic inertia container with adjustable inertia coefficient, characterized in that: It includes a cylinder body, the interior of the cylinder body is divided into a main cylinder body and a sub-cylinder body by a wall with a circular hole, a piston block is arranged inside the main cylinder body, piston rods are coaxially fixed on both ends of the piston block, and one end of the piston rod passes through the circular hole into the sub-cylinder body and is connected to the sub-cylinder body through a coaxially connected spring, and the other end of the piston rod passes through the main cylinder body to the outside, reserved holes are arranged on the cylinder wall of the main cylinder body on both ends of the piston block, the two reserved holes are connected through a tubular channel, and the tubular channel is composed of a straight pipe section, a spiral pipe section, and a connecting pipe.

2. The hydraulic inertia container with adjustable inertia coefficient according to claim 1, characterized in that: The outer diameter of the piston block is the same as the inner diameter of the main cylinder.

3. The hydraulic inertia container with adjustable inertia coefficient according to claim 1, characterized in that: The axial direction of the straight pipe section is parallel to the axial direction of the spiral pipe section, and the straight pipe section is located at a position where the central axis of the spiral pipe section deviates from a spiral radius.

4. The hydraulic inertia container with adjustable inertia coefficient according to claim 1, characterized in that: The inner diameters of the cross sections of the straight pipe section and the spiral pipe section are equal, and the interiors of the pipes at the intersection nodes of the two pipes are connected, so that when the liquid flows in the tubular channel, it can flow through both the straight pipe section and the spiral pipe section.

5. The hydraulic inertia container with adjustable inertia coefficient according to claim 1, characterized in that: The two ends of the straight pipe section are respectively connected to the two ends of the spiral pipe section, that is, the starting point of the straight pipe section is the same as and communicates with the starting point of the spiral pipe section, and the end point of the straight pipe section is the same as and communicates with the end point of the spiral pipe section.

6. The hydraulic inertia container with adjustable inertia coefficient according to claim 5, characterized in that: There are two connecting pipes, one end of which connects the straight pipe section and the starting point of the spiral pipe section, and the other end is connected to a reserved hole, and the other end of the connecting pipe connects the straight pipe section and the end point of the spiral pipe section, and the other end is connected to another reserved hole, so that the liquid encapsulated inside can flow smoothly in the closed space surrounded by the main cylinder body and the tubular channel.

7. The hydraulic inertia container with adjustable inertia coefficient according to claim 1, characterized in that: The wall surface is welded and connected inside the cylinder body.

8. The hydraulic inertia container with adjustable inertia coefficient according to claim 1, characterized in that: One end of the spring is fixed on the corresponding piston rod, and the other end is fixed on the auxiliary cylinder body.

9. The hydraulic inertia container with adjustable inertia coefficient according to claim 1, characterized in that: A sealing member is arranged between the circular hole and the corresponding piston rod.

10. A method for operating a hydraulic inertia container with adjustable inertia coefficient as claimed in any one of claims 1 to 9, characterized in that: Follow these steps: S1: When the two end points of the hydraulic inertia container with adjustable inertia coefficient are acted upon by external forces, the piston block moves horizontally axially, and the piston block squeezes the liquid in the main cylinder into the tubular channel, thereby driving the liquid to flow in the closed space formed by the main cylinder and the tubular channel. This process converts the horizontal axial movement of the piston block into irregular flow of the liquid in the tubular channel. S2: When the external force decreases, the moving speed of the piston block decreases, the flow rate of the liquid in the main cylinder and the tubular channel decreases, and the number of spiral tube sections that the liquid flows through in the tubular channel decreases. At this time, the flow length of the liquid in the tubular channel is reduced, the inertia coefficient of the inertia container is reduced, and the output inertial force is also reduced; when the flow rate cannot meet the highest point of a spiral tube section, the liquid flows back to the straight tube section along the original route, and flows back to the main cylinder from the end of the tubular channel; S3: When the external force increases, the moving speed of the piston block increases, the flow rate of the liquid in the main cylinder and the tubular channel increases, and the number of spiral tube sections that the liquid flows through in the tubular channel increases. At this time, the flow length of the liquid in the tubular channel increases, the inertia coefficient of the inertia container increases, and the output inertial force also increases. When the liquid flows through all the turns of the spiral tube section, the inertial force output by the inertia container reaches the maximum; at the same time, when the inertia container is working, a certain amount of energy loss will occur between the liquid and the inner wall of the tubular channel, the inner wall of the main cylinder, and the starting point and end point of the tubular channel, and the friction between the piston block and the inner wall of the main cylinder will participate in resisting the external force together.

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