An adjustable damping viscous damper with failure damping self-maintenance function

Abstract

The present application relates to a kind of adjustable damping viscous damper with failure damping self-sustaining function, including cylinder, piston rod and piston, the piston is slidably arranged in the cavity inside the cylinder, one end of the piston rod is connected to main structure, the other end is coaxially connected with the piston;The piston divides the cavity into left cavity and right cavity, and the piston is provided with damping hole, and the cylinder is externally provided with pipeline, and the damping hole and pipeline are respectively communicated with left cavity and right cavity, and adjustable valve is arranged on the pipeline, for adjusting the flow of pipeline.Compared with prior art, the present application has the advantages of simple and reliable structure and high safety.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction and seismic resistance technology, and in particular to an adjustable damping viscous damper with a self-sustaining failure damping function. Background Technology

[0002] Viscous dampers are installed as a whole in the main structure that requires vibration control. Their two ends are connected to the positions where the structure will move relative to the structure under external load excitation. By converting the kinetic energy of the structure into its own heat energy for dissipation, they reduce the vibration of the main structure on which they are installed. They are widely used in civil engineering, mechanical devices and other structures. They can be used by directly connecting them to the main structure to dissipate energy or by using them in conjunction with other devices such as dynamic vibration absorbers (or tuned mass dampers).

[0003] For example, Chinese Patent Application No. CN202311483466.7 discloses an active and semi-active viscous fluid damper and its control method; it includes a cylinder, a piston rod, and a piston; the piston rod passes through the fluid space of the cylinder and makes sealed contact with the cylinder in a linear displacement manner; the piston is mounted on the piston rod and divides the fluid space of the cylinder into a first cavity and a second cavity along the displacement direction of the piston rod. The first cavity and the second cavity are connected through a damping channel and a bypass damping hole in the cylinder. The bypass damping hole includes a first damping hole and a second damping hole respectively disposed at two opposite ends of the cylinder. The first damping hole and the second damping hole are respectively connected to a compensation oil circuit to form a pressure regulating circuit; the control method is that when the actual vibration of the structure to be damped exceeds its vibration limit, the compensation oil circuit starts to work and applies an active control force; when the actual vibration of the structure to be damped is lower than its vibration limit, the compensation oil circuit stops working and applies a semi-active control force.

[0004] When a viscous damper is in service, the energy dissipation capacity required by the main structure to which it is installed varies under different external load conditions. Therefore, there is a need for adjustable damping performance. Currently used purely passive viscous dampers cannot adjust their damping force after leaving the factory. Some (semi)active dampers cannot meet their basic performance requirements when there is no external energy supply (power outage) or when their damping force adjustment device fails.

[0005] In summary, when existing viscous dampers are in service, their basic performance may fail to meet requirements or even become stuck when faced with external power outages or valve failures, resulting in relatively low structural reliability and safety. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, such as the damper being prone to jamming failure due to external power failure or valve failure, and to provide an adjustable damping viscous damper with a self-maintaining failure damping function.

[0007] The objective of this invention can be achieved through the following technical solutions: An adjustable damping viscous damper with failure damping self-maintaining function includes a cylinder, a piston rod and a piston. The piston is slidably disposed in a cavity inside the cylinder. One end of the piston rod is connected to the main structure and the other end is coaxially connected to the piston. The piston divides the cavity into a left cavity and a right cavity. The piston is provided with a damping orifice. The cylinder is externally connected to a pipeline. The damping orifice and the pipeline are respectively connected to the left cavity and the right cavity. An adjustable valve is provided on the pipeline to adjust the flow rate of the pipeline.

[0008] Furthermore, a damping gap is provided between the piston and the inner wall of the cavity, and the left cavity and the right cavity are connected through the damping gap.

[0009] Furthermore, the adjustable valve includes an open adjustable valve and a normally closed valve connected in series. When there is a power outage or the open adjustable valve malfunctions, the normally closed valve remains closed.

[0010] Furthermore, the adjustable valve adopts an active adjustment structure, which is electrically driven or pneumatically driven; when the active adjustment structure is energized, the normally closed valve opens.

[0011] Furthermore, in the initial state of the damper, the adjustable valve is in the closed state, the damper is in the maximum damping force state, and the adjustable valve is used to reduce the maximum damping force of the damper.

[0012] Furthermore, the damper also includes a left ball joint seat and a right ball joint seat, which are located on both sides of the cylinder body. The left ball joint seat is installed at the end of the piston rod away from the piston, and the right ball joint seat is installed on the cylinder body.

[0013] Furthermore, piston rods are provided on both sides of the piston, and guide holes are provided on both sides of the cylinder cavity. The guide holes cooperate with the piston rods, and the piston rods are slidably disposed in the guide holes.

[0014] Furthermore, the damper also includes a damper displacement sensor and a structural vibration acquisition and control module that are electrically connected to each other; The damper displacement sensor is mounted on the cylinder block and is used to detect the displacement signals of the main structure and the damper during operation and transmit them to the structural vibration acquisition and control module. The structural vibration acquisition and control module is used to acquire structural vibration information and damper displacement signals, and to process and calculate the structural vibration information and damper displacement signals according to a preset algorithm to obtain the optimal damping value under the current working condition.

[0015] Furthermore, the adjustable valve adopts an electrically controlled adjustment structure, and the adjustable valve is electrically connected to a structural vibration acquisition and control module, which adjusts the flow rate of the adjustable valve according to the optimal damping value.

[0016] Furthermore, there are multiple damping holes, each symmetrically distributed around the piston.

[0017] Compared with the prior art, the present invention has the following advantages: (1) This solution directly connects the left and right cavities on both sides of the piston by setting a damping hole on the piston, which directly limits the maximum damping force of the damper. It can be set according to actual needs. The adjustable valve on the pipeline can flexibly reduce the damping force of the damper during use, making it more flexible to use. When there is a power outage or valve malfunction on site, the damping hole can still ensure the connection between the two cavities on both sides of the piston, avoiding the damper from getting stuck. The damper can work normally to ensure the safety of the main structure, and the structure is simple and easy to process.

[0018] (2) This solution can also connect the left and right cavities on both sides of the piston by reserving a damping gap between the piston and the cylinder cavity, thus ensuring the damping effect of the damper. This structure can be used in conjunction with the damping hole or set up independently, further ensuring the flow of the damping medium and the reliability of the damper. It is also simple in structure, highly adaptable, and has low processing cost.

[0019] (3) This solution uses a series of open adjustable valves and normally closed valves on the pipeline to adjust the flow rate of the damping medium based on the open adjustable valve, thereby adjusting the maximum damping force of the damper. The adjustment is convenient, flexible and more adaptable. The series normally closed valve can maintain the factory maximum damping force of the damper in the event of valve failure or power failure on site, ensuring the safety and reliability of the damper without the damper getting stuck. Attached Figure Description

[0020] Figure 1 A schematic diagram of the damper provided by the present invention; Figure 2 This is a schematic diagram of the structure of the damper cavity portion provided by the present invention; Figure 3 A schematic diagram of the adjustable valve of the damper provided by the present invention; In the diagram: 1. Left ball joint seat, 2. Cylinder body, 3. Piston rod, 4. Piston, 5. Right ball joint seat, 6. Pipeline, 7. Adjustable valve, 8. Cavity, 9. Damper displacement sensor, 10. Structural vibration acquisition and control module, 71. Open adjustable valve, 72. Normally closed valve, 81. Left cavity, 82. Right cavity, 83. Damping clearance, 84. Damping orifice. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] Example 1 like Figure 1As shown, this embodiment provides an adjustable damping viscous damper with failure damping self-maintaining function, including a cylinder 2, a piston rod 3 and a piston 4. The piston 4 is slidably disposed in the cavity 8 inside the cylinder 2. One end of the piston rod 3 is connected to the main structure, and the other end is coaxially connected to the piston 4. The piston 4 divides the cavity 8 into a left cavity 81 and a right cavity 82. The piston 4 is provided with a damping hole 84. The cylinder 2 is externally provided with a pipe 6. The damping hole 84 and the pipe 6 are respectively connected to the left cavity 81 and the right cavity 82. An adjustable valve 7 is provided on the pipe 6 to adjust the flow rate of the pipe 6.

[0028] Working principle: The damper is installed between the main structures requiring vibration control. When the main structure vibrates, the piston rod 3 drives the piston 4 to move within the cavity 8 of the cylinder 2. At this time, the damping medium between the left cavity 81 and the right cavity 82 will flow between them through the damping hole 84 and the pipe 6. During this flow, a damping force is generated, which plays a role in vibration reduction and shock absorption. During service, the damping force can be reduced using the adjustable valve 7 to meet the current required damping value. If there is a power outage or valve malfunction, the piston can still flow normally through the damping hole 84, ensuring the normal operation of the damper.

[0029] By setting a damping orifice on piston 4, the left cavity 81 and right cavity 82 on both sides of the piston are directly connected, which directly limits the maximum damping force of the damper. This can be set according to actual needs. The adjustable valve 7 on pipeline 6 can flexibly adjust the damping force of the damper during use, making it more flexible. When there is a power outage or valve malfunction, the damping orifice can still ensure the connection between the two cavities on both sides of the piston, preventing the damper from jamming. The damper can work normally to ensure the safety of the main structure, and the structure is simple and easy to manufacture.

[0030] Preferred implementation methods, such as Figure 2 As shown, a damping gap 83 is provided between the piston 4 and the inner wall of the cavity 8, and the left cavity 81 and the right cavity 82 are connected through the damping gap 83.

[0031] It should be clarified that the damping gap 83 and the damping hole 84 can be set simultaneously, or only one of them can be set. As long as it can ensure that the damping medium in the left and right cavities can still be connected when the pipeline is blocked, the piston can move normally left and right, avoid the damper from jamming, and ensure the reliability of the damper.

[0032] By pre-reserving a damping gap 83 between the piston 4 and the cavity 8 of the cylinder 2, the left cavity 81 and the right cavity 82 on both sides of the piston 4 can be connected, ensuring the damping effect of the damper. This structure can be used in conjunction with the damping hole 84 or set independently, further ensuring the flow of the damping medium and the reliability of the damper. It is also simple in structure, highly adaptable, and has low processing cost.

[0033] Preferred implementation methods, such as Figure 3 As shown, the adjustable valve 7 includes an open adjustable valve 71 and a normally closed valve 72 connected in series. When the power is off or the open adjustable valve 71 malfunctions, the normally closed valve 72 remains closed. The open adjustable valve 71 adopts an active adjustment structure, which is electrically driven or pneumatically controlled. When the active adjustment structure is energized, the normally closed valve 72 opens.

[0034] By setting an open adjustable valve 71 and a normally closed valve 72 in series on the pipeline 6, the flow rate of the damping medium can be adjusted based on the open adjustable valve 71, thereby adjusting the maximum damping force of the damper. The adjustment is convenient and flexible, and the normally closed valve in series can maintain the factory maximum damping force of the damper in the event of valve failure or power failure on site, ensuring the safety and reliability of the damper without the damper getting stuck.

[0035] In this embodiment, the damper also includes a left ball joint seat 1 and a right ball joint seat 5. The left ball joint seat 1 and the right ball joint seat 5 are located on both sides of the cylinder body 2. The left ball joint seat 1 is installed on the end of the piston rod 3 away from the piston 4, and the right ball joint seat 5 is installed on the cylinder body 2.

[0036] Furthermore, piston rods are provided on both sides of piston 4, and guide holes are coaxially distributed on both sides of cavity 8 of cylinder 2. The guide holes cooperate with piston rods, and piston rods can be slidably disposed within the guide holes. The guide rods can ensure the stability of piston movement, and when there is a damping gap 83, the guide rods can also prevent piston tilting and blocking the damping gap, making the structure more reliable.

[0037] In this embodiment, the damper also includes a damper displacement sensor 9 and a structural vibration acquisition and control module 10 that are electrically connected to each other; the damper displacement sensor 9 is mounted on the cylinder 2 and is used to detect the displacement signals of the main structure and the damper when the damper is in service and transmit them to the structural vibration acquisition and control module 10. The structural vibration acquisition and control module 10 is used to acquire structural vibration information and damper displacement signals, and to process and calculate the structural vibration information and damper displacement signals according to a preset algorithm to obtain the optimal damping value under the current working condition.

[0038] Furthermore, the adjustable valve 7 adopts an electrically controlled adjustment structure and is electrically connected to the structural vibration acquisition and control module 10. The structural vibration acquisition and control module 10 adjusts the flow rate of the adjustable valve 7 according to the optimal damping value. By monitoring the dynamic information of the piston rod, the maximum damping force adapted between the main structures is detected, thereby adjusting the flow rate of the pipe opening and adjusting the maximum damping force of the damper, which can achieve better vibration reduction and seismic resistance.

[0039] Optionally, there can be multiple damping holes 84, which are symmetrically distributed around the piston 4. When the theoretical flow area of ​​the damping holes 84 is too large, multiple damping holes 84 can be set up and evenly distributed along the circumference of the piston to improve the uniformity of the flow of the damping medium during piston movement.

[0040] In conjunction with the above preferred embodiments, this embodiment also provides a more specific embodiment: a fail-safe self-maintaining maximum damping adjustable viscous damper, including a left ball joint seat 1, a right ball joint seat 5, a cylinder 2, a piston rod 3, a piston 4, a pipeline 6, an adjustable valve 7, a damper displacement sensor 9, and a structural vibration acquisition and control module 10.

[0041] Specifically, piston 4 divides cylinder 2 into left and right parts, namely left cavity 81 and right cavity 82. Inside cylinder 2, left cavity 81 and right cavity 82 are connected by damping gap 83 and damping hole 84 between piston 4 and cylinder 2. Damping gap 83 and damping hole 84 can exist simultaneously, or only one of them can exist. Outside cylinder 2, left cavity 81 and right cavity 82 are connected by pipe 6 and adjustable valve 7 when adjustable valve 7 is opened.

[0042] In this embodiment, the left ball joint seat 1 and the right ball joint seat 5 are connected to positions where relative movement occurs with the main structure to which they are installed. The piston rod 3 is connected to the left ball joint seat 1. When the left ball joint seat 1 and the right ball joint seat 5 are driven by the structure to generate relative movement, the piston rod 3 will drive the piston 4 to move. At this time, the damping medium between the left cavity 81 and the right cavity 82 will flow between them, generating damping force during the flow. The magnitude of the generated damping force is related to the damping gap 83, the damping orifice 84, and the adjustable valve 7. The damping gap 83 and the damping orifice 84 are adjusted at the factory to adjust the damper to the maximum damping force that the structure may require. Under the maximum damping force parameter, the adjustable valve 7 is in the closed state.

[0043] In this embodiment, the structural vibration acquisition and control module 10 and the damper displacement sensor 9 can provide dynamic information about the structure and the damper under in-service conditions, and calculate the current optimal damping value through an algorithm. This specific damping adjustment method is not the focus of this solution, and there are already many existing technologies for semi-active adjustment; therefore, this application will not elaborate on this aspect.

[0044] Furthermore, the adjustable valve 7 can be adjusted manually or semi-actively. The semi-active adjustment method can be electrically or pneumatically driven. When the adjustable valve 7 is electrically adjusted, if there is no external power supply due to a power outage and it cannot be reset, it can be temporarily powered by the on-site UPS power supply and the system will issue a closing signal after the power outage during self-testing. Alternatively, it can be manually reset to ensure the safety of the installed main structure.

[0045] If the adjustable valve 7 is damaged and jammed or malfunctions, the left cavity 81 and right cavity 82 will still remain connected through the damping gap 83 and damping orifice 84 without jamming, ensuring the safety of the installed main structure. The adjustable valve 7 consists of an open adjustable valve 71 and a normally closed valve 72. In the default power failure state and when the system detects an abnormal state of the open adjustable valve 71, the normally closed valve 72 is closed. Therefore, the damping medium in the damper will flow entirely from the left cavity 81 to the right cavity 82 without passing through the adjustable valve 7, thus maintaining the damper at its maximum damping parameter and protecting the safety of the installed main structure.

[0046] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An adjustable damping viscous damper with failure damping self-maintaining function, comprising a cylinder (2), a piston rod (3) and a piston (4), wherein the piston (4) is slidably disposed in a cavity (8) inside the cylinder (2), and one end of the piston rod (3) is connected to the main structure and the other end is coaxially connected to the piston (4). Its features are, The piston (4) divides the cavity (8) into a left cavity (81) and a right cavity (82). The piston (4) is provided with a damping hole (84). The cylinder (2) is externally provided with a pipeline (6). The damping hole (84) and the pipeline (6) are respectively connected to the left cavity (81) and the right cavity (82). The pipeline (6) is provided with an adjustable valve (7) for adjusting the flow rate of the pipeline (6). A damping gap (83) is provided between the piston (4) and the inner wall of the cavity (8), and the left cavity (81) and the right cavity (82) are connected through the damping gap (83); The adjustable valve (7) includes an open adjustable valve (71) and a normally closed valve (72) connected in series. When there is a power outage or the open adjustable valve (71) is abnormal, the normally closed valve (72) remains closed. In the initial state of the damper, the open adjustable valve (71) is in the closed state, the damper is in the maximum damping force state, and the open adjustable valve (71) is used to reduce the maximum damping force of the damper.

2. The adjustable damping viscous damper with self-sustaining failure damping function according to claim 1, characterized in that, The adjustable valve (71) adopts an active adjustment structure, which is electrically driven or pneumatically driven by an electric control; when the active adjustment structure is energized, the normally closed valve (72) opens.

3. The adjustable damping viscous damper with self-sustaining failure damping function according to claim 1, characterized in that, The damper also includes a left ball joint seat (1) and a right ball joint seat (5), which are located on both sides of the cylinder body (2). The left ball joint seat (1) is installed on the piston rod (3) away from the piston (4), and the right ball joint seat (5) is installed on the cylinder body (2).

4. An adjustable damping viscous damper with self-sustaining failure damping function according to claim 3, characterized in that, The piston (4) has piston rods on both sides, and the cylinder (2) has guide holes distributed coaxially on both sides of the cavity (8). The guide holes cooperate with the piston rods, and the piston rods are slidably disposed in the guide holes.

5. An adjustable damping viscous damper with self-sustaining failure damping function according to claim 3, characterized in that, The damper also includes a damper displacement sensor (9) and a structural vibration acquisition and control module (10) that are electrically connected to each other. The damper displacement sensor (9) is installed on the cylinder (2) to detect the displacement signal between the main structure and the damper when the damper is in service and transmit it to the structural vibration acquisition and control module (10). The structural vibration acquisition and control module (10) is used to acquire structural vibration information and damper displacement signal, and to process and calculate the structural vibration information and damper displacement signal according to a preset algorithm to obtain the optimal damping value under the current working condition.

6. An adjustable damping viscous damper with self-sustaining failure damping function according to claim 5, characterized in that, The adjustable valve (7) adopts an electrically controlled adjustment structure, and the adjustable valve (7) is electrically connected to the structural vibration acquisition and control module (10). The structural vibration acquisition and control module (10) adjusts the flow rate of the adjustable valve (7) according to the optimal damping value.

7. An adjustable damping viscous damper with self-sustaining failure damping function according to claim 1, characterized in that, The number of damping holes (84) is multiple, and each damping hole (84) is symmetrically distributed around the piston (4).

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