Hydraulic inerter with adjustable inerter coefficient

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] This utility model relates to a hydraulic inertial container with an adjustable inertial coefficient, and relates to the field of structural vibration reduction technology. Background Technology

[0002] An inertial container is an acceleration-dependent device whose output inertial force is proportional to the acceleration. The coefficient before acceleration is called the inertial coefficient. Existing inertial containers come in various forms, including rack and pinion and ball screw types. Their common feature is that they convert the horizontal displacement between the two ends of the inertial container to output an inertial force greater than the actual weight of the container. Fluid-type inertial containers output inertial force by converting the horizontal movement between the two ends into the flow of liquid along a tubular channel. However, existing fluid-type inertial containers can mostly only output a fixed inertial force and cannot achieve adjustable inertial coefficients. A disadvantage of inertial containers with fixed inertial coefficients, especially under seismic loading, is that the external excitation experienced by the structure varies randomly. When the excitation is consistently small, existing inertial containers with fixed inertial coefficients continuously output a constant inertial force, increasing the dynamic mass of the structure. Furthermore, the acceleration and displacement responses of the structure are relatively small at this time, and excessive inertial force is not needed to assist in vibration reduction.

[0003] To address the above technical problems, this application provides a hydraulic inertial container with an adjustable inertial coefficient. When the excitation is relatively small, the dynamic mass of the structure is reduced by decreasing the inertial coefficient; when the excitation is relatively large, the output of a larger inertial force is assisted in the vibration reduction of the structure by increasing the inertial coefficient.

[0004] Therefore, it can be seen that this hydraulic inertia container with adjustable inertia coefficient can enhance the vibration reduction performance of a structure and can also be applied to vibration damping devices. While reducing the mass of the vibration damping device, it leverages the adjustable inertia coefficient to improve the performance of the device. Furthermore, this hydraulic inertia container with adjustable inertia coefficient is not only simple in structure and low in manufacturing cost, but also convenient to place, making it suitable for applications in high-rise buildings, bridges, machinery, and other fields. Utility Model Content

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a hydraulic inertial container with an adjustable inertial coefficient.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a hydraulic inertia container with adjustable inertia coefficient, including a cylinder body. The cylinder body is divided into a main cylinder body and a secondary cylinder body by a wall with a circular hole. A piston block is provided inside the main cylinder body. A piston rod is coaxially fixed on both ends of the piston block. One end of the piston rod passes through the circular hole into the secondary cylinder body and is connected to the secondary cylinder body by a spring connected coaxially. The other end of the piston rod passes out of the main cylinder body to the outside. Pre-reserved holes are provided on the cylinder wall of the main cylinder body on both ends of the piston block. The two pre-reserved holes are connected by a tubular channel. 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 main 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 point on the central axis of the spiral pipe section that is offset from the 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 pipes at the intersection 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.

[0010] Preferably, 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 connected to the starting point of the spiral pipe section, and the ending point of the straight pipe section is the same as and connected to the ending point of the spiral pipe section.

[0011] Preferably, the connecting pipe has two pipes. One pipe connects one end to the starting point of the straight pipe section and the spiral pipe section and the other end to a reserved hole. The other pipe connects one end to the ending point of the straight pipe section and the spiral pipe section and the other end to another reserved hole, so as to facilitate the smooth flow of the internally encapsulated liquid in the closed space formed by the main cylinder 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 auxiliary cylinder.

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

[0015] Compared with the prior art, the present invention has the following beneficial effects: the hydraulic inertial container with adjustable inertial coefficient reduces the dynamic mass of the structure by decreasing the inertial coefficient when the excitation is small; and increases the inertial coefficient when the excitation is large, thereby outputting a larger inertial force to assist in the structure's vibration reduction.

[0016] This hydraulic inertia container with adjustable inertia coefficient can enhance the vibration damping performance of structures and can also be applied to vibration damping devices. It reduces the mass of the damping device while leveraging the adjustable inertia coefficient to improve its performance. Furthermore, this hydraulic inertia container with adjustable inertia coefficient is not only simple in structure and low in manufacturing cost, but also easy to place, making it suitable for applications in high-rise buildings, bridges, machinery, and other fields.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0019] Figure 2 Time history diagram of the top-floor displacement response of a four-story frame structure equipped with this utility model under the Qian An earthquake wave.

[0020] Figure 3 The time history diagram of the top-level acceleration response of the four-story frame structure equipped with this utility model under the Qian An earthquake wave.

[0021] In the diagram: 1. Wall surface; 2. Main cylinder body; 3. Sub-cylinder body; 4. Piston block; 5. Piston rod; 6. Spring; 7. Reserved hole; 8. Straight pipe section; 9. Spiral pipe section; 10. Connecting pipe. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] like Figures 1-3As shown, this embodiment provides a hydraulic inertia container with an adjustable inertial volume coefficient. With proper design, this inertia container can output an inertial force greater than its actual weight, while simultaneously achieving an adjustable inertial volume coefficient, reducing the dynamic mass during structural vibration, and enhancing the structure's vibration damping performance. The hydraulic inertia container includes a cylinder body, the interior of which is divided into a main cylinder body 2 and a secondary cylinder body 3 by a wall 1 with a circular hole. A piston block 4 is installed inside the main cylinder body, and piston rods 5 are coaxially fixed to both ends of the piston block. One end of one piston rod passes through the circular hole into the secondary cylinder body and is connected to the secondary cylinder body via a coaxially connected spring 6. The other end of the piston rod extends out of the main cylinder body to the outside, for connection to the external structure to be damped. Pre-drilled holes 7 are provided on the cylinder walls of the main cylinder body at both ends of the piston block. The two pre-drilled holes are connected by a tubular channel, which consists of a straight pipe section 8, a spiral pipe section 9, and a connecting pipe 10.

[0026] Under the action of external force, the inertial container is subjected to forces at both ends, causing the piston block to shift. The movement of the piston block forces the liquid in the main cylinder into the tubular channel, thus transforming the horizontal movement of the piston block into a complex flow of liquid within the tubular channel. This achieves an output inertial force greater than the actual weight of the inertial container. As the external force gradually increases from zero, the initial velocity of the liquid forced into the tubular channel also gradually increases, and the flow length within the tubular channel continuously increases, evolving from the initial "connecting pipe - straight pipe section - connecting pipe" to "connecting pipe - straight pipe section and one spiral pipe section - connecting pipe," and then to "connecting pipe - straight pipe section and all spiral pipe sections - connecting pipe." Since the magnitude of the inertial force output by the inertial container is related to the flow length of the liquid within the tubular channel, the inertial force output by the inertial container can be adjusted based on the change in flow length with the magnitude of the external force.

[0027] In this embodiment of the invention, the outer diameter of the piston block is the same as the inner diameter of the main cylinder.

[0028] In this embodiment of the 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 at a point offset downward from the central axis of the spiral pipe section by a spiral radius.

[0029] In this embodiment of the 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 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.

[0030] In this embodiment of the utility model, 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 connected to the starting point of the spiral pipe section, and the ending point of the straight pipe section is the same as and connected to the ending point of the spiral pipe section.

[0031] In this embodiment of the utility model, the connecting pipe has two parts. One part of the connecting pipe is connected to the starting point of the straight pipe section and the spiral pipe section at one end and to a reserved hole at the other end. The other part of the connecting pipe is connected to the ending point of the straight pipe section and the spiral pipe section at one end and to another reserved hole at the other end, so as to facilitate the smooth flow of the internally encapsulated liquid in the closed space formed by the main cylinder and the tubular channel.

[0032] In this embodiment of the invention, the wall surface is welded to the inside of the cylinder body.

[0033] In this embodiment of the invention, one end of the spring is fixed to the corresponding piston rod, and the other end is fixed to the auxiliary cylinder. The spring is provided to ensure that the piston block can promptly return to its initial position after displacement.

[0034] In this embodiment of the invention, a sealing element is provided between the circular hole and the corresponding piston rod.

[0035] A method for operating a hydraulic inertial container with an adjustable inertial coefficient, comprising the following steps:

[0036] S1: When the two ends of the hydraulic inertial container with adjustable inertial coefficient are subjected to external force, the piston block moves horizontally in the axial direction. 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 transforms the horizontal axial movement of the piston block into the irregular flow of the liquid in the tubular channel.

[0037] S2: When the external force decreases, the piston block moves slower, the liquid flows faster in the main cylinder and tubular channel, the number of spiral tube sections the liquid passes through in the tubular channel decreases, the length the liquid flows through in the tubular channel decreases, the inertial capacity coefficient of the inertial container decreases, and the output inertial force also decreases; when the flow velocity cannot meet the requirement that the liquid passes through the highest point of a certain spiral tube section, the liquid flows back along the original path to the straight tube section and flows back to the main cylinder from the end of the tubular channel;

[0038] S3: When the external force increases, the piston block moves faster, the liquid flows faster in the main cylinder and tubular channel, and the number of spiral tube segments through which the liquid flows in the tubular channel increases. At this time, the liquid flows through the tubular channel for a longer distance, the inertial capacity coefficient of the inertial container increases, and the output inertial force also increases. When the liquid flows through all the spiral tube segments, the output inertial force of the inertial container reaches its maximum. At the same time, when the inertial container is working, the liquid will generate a certain amount of energy loss with the inner wall of the tubular channel, the inner wall of the main cylinder, the starting point and the ending point of the tubular channel, and the friction between the piston block and the inner wall of the main cylinder will also participate in resisting the external force.

[0039] To simulate the actual vibration reduction effect of the inertial container, a four-story frame structure model was established, with the inertial container installed between the third and fourth floors. Taking the model under the excitation of Qian An seismic waves as an example, through... Figure 2 , Figure 3 It is clear that the inertial container has a good shock absorption effect.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A hydraulic inerter with adjustable inerter coefficient, characterized in that: The application relates to a cylinder device, which comprises a cylinder body, a main cylinder body and a sub-cylinder body separated by a wall with a hole, a piston block arranged in the main cylinder body, a piston rod coaxially arranged at both ends of the piston block, and a spring coaxially connected between one end of the piston rod and the sub-cylinder body, and the other end of the piston rod is arranged outside the main cylinder body, and a reserved hole is arranged on the cylinder wall of the main cylinder body at both ends of the piston block, and the two reserved holes are connected by a tubular channel, and the tubular channel is composed of a straight pipe section, a spiral pipe section and a connecting pipe.

2. The tunable fluidic inerter of claim 1, wherein: The outer diameter of the piston block is the same as the inner diameter of the main cylinder body.

3. The tunable fluidic inerter of claim 1, wherein: 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 arranged at a spiral radius away from the central axis of the spiral pipe section.

4. The tunable fluidic inerter of claim 1, wherein: The inner diameters of the cross sections of the straight pipe section and the spiral pipe section are equal, and the interiors of the two pipe intersection nodes are connected, so that the liquid can flow through the straight pipe section and the spiral pipe section when flowing in the tubular channel.

5. The tunable fluidic inerter of claim 1, wherein: 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 ending point of the straight pipe section is the same as and communicates with the ending point of the spiral pipe section.

6. The tunable fluidic inerter of claim 5, wherein: The connecting pipe has two connecting pipes, one end of one connecting pipe is connected to the starting point of the straight pipe section and the spiral pipe section, and the other end is connected to one reserved hole, and one end of the other connecting pipe is connected to the ending point of the straight pipe section and the spiral pipe section, and the other end is connected to the other reserved hole, so that the liquid in the enclosed space formed by the main cylinder body and the tubular channel can smoothly flow.

7. The tunable fluidic inerter of claim 1, wherein: The wall is welded and connected in the cylinder body.

8. The tunable fluidic inerter of claim 1, wherein: One end of the spring is fixed on the corresponding piston rod, and the other end is fixed on the sub-cylinder body.

9. The tunable fluidic inerter of claim 1, wherein: Sealing elements are arranged between the hole and the corresponding piston rod.

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