Self-energized semi-active viscous damper and operation method thereof

Abstract

The invention relates to a self-powered semi-active viscous damper and an operation method thereof. The damper comprises an energy conversion cavity, a hydraulic cylinder cavity, a piston rod, a ball screw, an electromagnetic motor, an energy storage device and a control sensing unit. The piston rod penetrates through the hydraulic cylinder cavity and extends into the energy conversion cavity, a piston head on the piston rod divides the hydraulic cylinder cavity into a first hydraulic cylinder cavity and a second hydraulic cylinder cavity, the first hydraulic cylinder cavity and the second hydraulic cylinder cavity are communicated through a bypass pipeline, and a flow control valve is arranged on the pipeline. Translation of the piston rod in the energy conversion cavity is converted into rotation through the ball screw, then the electromagnetic motor is driven to convert rotation kinetic energy into electric energy, and the energy storage device collects and stores the electric energy. The control sensing unit adjusts the opening degree of the flow control valve according to the structural vibration amplitude, and semi-active control over the damper is achieved. Compared with the prior art, self-adaptive control over structural vibration is achieved, self-supply of electric energy can be achieved, and the self-adaptive vibration control device adapts to the complex vibration environment.

Description

Technical Field

[0001] The invention relates to the technical field of structural vibration reduction, and in particular to a self-powered semi-active viscous damper and an operating method thereof. Background Art

[0002] In the field of civil engineering, with the continuous development of large structures such as high-rise buildings, bridges, and nuclear power plants, structures are facing more diverse and extreme dynamic loads, including natural disasters such as earthquakes and wind loads, as well as other environmental excitations. These external loads may cause structural vibrations, which in turn affect the safety and service life of the structure, and may even cause serious property losses and casualties. Therefore, how to effectively control structural vibrations has become a major challenge in the current field of civil engineering.

[0003] Traditional viscous dampers and semi-active control technologies are widely used in structural vibration control, and can reduce the impact of vibration on the structure by adjusting the damping force. Viscous dampers usually use liquid as the damping medium and consume vibration energy through the viscous properties of the fluid. Semi-active dampers combine the advantages of active and passive control systems and can respond to the vibration of the structure in real time by adjusting the characteristics of the damper (such as flow control, valve adjustment, etc.) without increasing external energy consumption. For example, Chinese patent CN117212382A discloses an active and semi-active viscous fluid damper, which is provided with a bypass damping hole equipped with an adjustable check valve at both ends of the device. The output can be adjusted by controlling the adjustable check valve, which not only greatly improves the damping efficiency of the device, but also effectively shortens the length of the device.

[0004] However, existing semi-active dampers generally rely on external power supplies or mechanical drives to achieve damping adjustment, which often results in certain energy consumption issues, and in extreme cases (such as power outages after an earthquake) may lead to a significant decrease in control effect. Therefore, how to eliminate dependence on external power supplies and achieve self-powering of the damper while ensuring good control performance and achieving wide-band vibration control has become an important technical requirement. Summary of the invention

[0005] The purpose of the present invention is to provide a self-powered semi-active viscous damper and an operating method thereof, which can achieve broadband vibration control and self-powering of the damper.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a self-powered semi-active viscous damper, comprising an energy conversion chamber, a hydraulic cylinder chamber, and a piston rod, wherein the energy conversion chamber and the hydraulic cylinder chamber are sealed and connected, and the piston rod penetrates the hydraulic cylinder chamber and extends into the energy conversion chamber;

[0008] The piston rod is provided with a piston head, which divides the hydraulic cylinder chamber into a first hydraulic cylinder chamber and a second hydraulic cylinder chamber along the axial direction of the piston rod. Bypass pipelines are provided on both sides of the hydraulic cylinder chamber. The first hydraulic cylinder chamber and the second hydraulic cylinder chamber are connected through the bypass pipeline, and flow control valves are provided on the bypass pipelines.

[0009] The portion of the piston rod extending into the energy conversion chamber is provided with a ball screw capable of converting the translational motion of the piston rod into rotational motion, and the energy conversion chamber is also provided with an electromagnetic motor capable of converting rotational kinetic energy into electrical energy;

[0010] The damper also includes an energy storage device and a control sensing unit.

[0011] In the present invention, the stroke L1 of the piston rod in the ball screw is equal to the stroke L2 in the second hydraulic cylinder chamber, ensuring that the translation of the piston rod is not affected and that the ball screw can effectively convert the translation of the piston rod into rotational motion.

[0012] Preferably, a first piston shaft connector is provided at one end of the piston rod close to the hydraulic cylinder chamber, and a second piston shaft connector is provided at one end of the energy conversion chamber away from the hydraulic cylinder chamber. The damper is connected to the first structure and the second structure through the first piston shaft connector and the second piston shaft connector. When the first structure and the second structure vibrate, the piston rod moves linearly along its axial direction.

[0013] Preferably, the control sensor unit is electrically connected to the flow control valve and can control the on / off state of the flow control valve.

[0014] Preferably, the control sensing unit comprises a sensor capable of monitoring the vibration amplitude of the first structure and the second structure.

[0015] Further preferably, the sensor includes an acceleration sensor, a displacement sensor or a velocity sensor.

[0016] Preferably, the hydraulic cylinder cavity is filled with damping fluid, the energy conversion cavity and the hydraulic cylinder cavity are sealedly connected via a cavity connecting portion, and the cavity connecting portion is provided with a through hole for the piston rod to pass through the cavity connecting portion and extend to the energy conversion cavity.

[0017] In the present invention, the cavity connection portion is arranged to ensure that the damping fluid only flows in the hydraulic cylinder cavity and does not leak into the energy conversion cavity.

[0018] Preferably, the electromagnetic motor is arranged in the energy conversion chamber at one end away from the hydraulic cylinder chamber through a fixing part, and the output end of the ball screw is coaxially connected to the rotor of the electromagnetic motor. The magnetic flux lines of the electromagnetic motor are cut by the rotational motion of the ball screw to convert the rotational kinetic energy into electrical energy.

[0019] Preferably, the energy storage device is arranged on the energy conversion cavity, which is electrically connected to the electromagnetic motor, and can collect the electrical energy converted from the rotational kinetic energy by the electromagnetic motor, and supply energy to the damper.

[0020] Further preferably, the energy storage device includes a supercapacitor or a lithium battery.

[0021] The present invention also provides an operating method of the self-powered semi-active viscous damper, which controls the sensing unit to identify the vibration amplitude of the first structure and the second structure, controls the flow control valve to adjust the valve opening, thereby adjusting the amount of damping fluid passing through the bypass pipeline and changing the damping level.

[0022] Preferably, when the flow control valve is closed, the flow of the damping fluid is restricted and the damping is increased; when the flow control valve is fully opened, the damping fluid can flow freely between the first hydraulic cylinder chamber and the second hydraulic cylinder chamber through the bypass line, achieving a low damping response.

[0023] Preferably, under a vibration environment, the piston rod moves horizontally, the ball screw converts the translation of the piston rod into rotational motion, the electromagnetic motor converts the rotational kinetic energy into electrical energy and stores it in an energy storage device, and the energy storage device provides energy for the flow control valve to achieve energy self-supply.

[0024] The self-powered semi-active viscous damper of the present invention converts the mechanical energy of the structure itself into electrical energy by driving the control sensing unit, thereby eliminating the dependence on an external power source. Through the motion conversion mechanism, the kinetic energy generated by the structure during vibration is converted into electrical energy and stored in the energy storage device for use by the subsequent control system. In addition, the adjustment of the flow control valve enables the damper to adjust the damping capacity in real time according to the vibration response of the structure, thereby achieving wide-band vibration control.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention provides a self-powered semi-active viscous damper, which can adjust the damping capacity of the damper in real time according to the vibration response of the structure through the regulation of the flow control valve. At the same time, it can convert the kinetic energy generated by the structure during the vibration process into electrical energy and store it in an energy storage device to power the damper, thereby achieving wide-band vibration control and self-powering of the damper.

[0027] (2) The self-powered semi-active viscous damper of the present invention monitors the vibration of the structure by controlling the sensing unit and can adjust the damping level by adjusting the position of the flow control valve between fully open and fully closed. It can adapt to the vibration control requirements within different frequency ranges and provide effective control from low-frequency to high-frequency vibrations, thereby achieving wide-band vibration control. It is particularly suitable for coping with various complex excitations such as earthquakes and wind loads.

[0028] (3) The self-powered semi-active viscous damper of the present invention can convert the translational motion of the piston rod generated by the structural vibration into rotational motion through the cooperation of the electromagnetic motor and the ball screw, and then generate electricity through the cutting of magnetic flux lines, thereby converting kinetic energy into electrical energy, thereby realizing energy recovery and efficient utilization.

[0029] (4) The self-powered semi-active viscous damper of the present invention avoids dependence on external power sources through the energy conversion mechanism of the structure itself, ensuring that the damper can still work normally in extreme disaster situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the self-powered semi-active viscous damper of the present invention;

[0031] Figure 2 for Figure 1 AA cross-sectional diagram of FIG.

[0032] Figure 3 for Figure 1 BB cross-section diagram;

[0033] In the figure, 1-energy conversion chamber, 2-hydraulic cylinder chamber, 21-first hydraulic cylinder chamber, 22-second hydraulic cylinder chamber, 3-piston rod, 31-piston head, 4-bypass pipeline, 5-flow control valve, 6-ball screw, 7-electromagnetic motor, 8-energy storage device, 9-first piston shaft connector, 10-second piston shaft connector, 11-sensor, 12-cavity connecting part, 13-fixing part. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the following implementation manners or examples, unless otherwise specified, functional components or structures are conventional components or conventional structures used in the art to achieve corresponding functions.

[0038] Example 1

[0039] A self-powered semi-active viscous damper is mainly composed of three parts: an energy conversion chamber 1, a hydraulic cylinder chamber 2, and a piston rod 3. The hydraulic cylinder chamber 2 is filled with damping fluid. The energy conversion chamber 1 and the hydraulic cylinder chamber 2 are sealed and connected, and the piston rod 3 passes through the hydraulic cylinder chamber 2 and extends into the energy conversion chamber 1. A piston head 31 is mounted on the piston rod 3, and the piston head 31 divides the hydraulic cylinder chamber 2 into a first hydraulic cylinder chamber 21 and a second hydraulic cylinder chamber 22 along the axial direction of the piston rod 3, and bypass lines 4 are provided on both sides of the hydraulic cylinder chamber 2, and the bypass lines 4 connect the first hydraulic cylinder chamber 21 and the second hydraulic cylinder chamber 22, and are equipped with a flow control valve 5 to achieve precise regulation of the flow of damping fluid in the hydraulic cylinder chamber 2.

[0040] The portion of the piston rod 3 extending into the energy conversion chamber 1 is equipped with a ball screw 6, whose function is to convert the translation of the piston rod 3 into rotational motion. An electromagnetic motor 7 is also provided inside the energy conversion chamber 1, which can convert the rotational kinetic energy generated by the ball screw 6 into electrical energy. In addition, the damper of this embodiment is also equipped with an energy storage device 8 and a control sensing unit, wherein the energy storage device 8 is used to store the electrical energy converted by the electromagnetic motor, and the control sensing unit is responsible for regulating the working state of the damper according to the vibration signal, realizing a semi-active control function to adapt to different working conditions and requirements.

[0041] Example 2

[0042] A self-powered semi-active viscous damper, the structure of which is as follows Figure 1-3 As shown, it includes an energy conversion chamber 1, a hydraulic cylinder chamber 2, a piston rod 3, and a control sensor unit.

[0043] The energy conversion chamber 1 and the hydraulic cylinder chamber 2 are sealed and connected by a cavity connection part 12. The cavity connection part 12 is provided with a through hole, which enables the piston rod 3 to pass through the hydraulic cylinder chamber 2 and extend into the energy conversion chamber 1. A piston head 31 is installed on the piston rod 3. The piston head 31 divides the hydraulic cylinder chamber 2 into a first hydraulic cylinder chamber 21 and a second hydraulic cylinder chamber 22 along the axial direction of the piston rod 3, and a bypass line 4 is provided on both sides of the hydraulic cylinder chamber 2, so that the first hydraulic cylinder chamber 21 and the second hydraulic cylinder chamber 22 can be connected through the bypass line 4. The hydraulic cylinder chamber 2 is filled with damping fluid, and the setting of the cavity connection part 12 ensures that the damping fluid does not leak into the energy conversion chamber 1. A flow control valve 5 is provided on the bypass line 4 to achieve regulation of the flow of the damping fluid.

[0044] The end of the piston rod 3 close to the hydraulic cylinder chamber 2 is provided with a first piston shaft connector 9, and the end of the energy conversion chamber 1 away from the hydraulic cylinder chamber 2 is provided with a second piston shaft connector 10. The damper is installed on the first structure and the second structure through these two connectors. When the first structure and the second structure vibrate, the piston rod 3 can generate translational motion along its axial direction.

[0045] The control sensing unit is electrically connected to the flow control valve 5, and the control sensing unit includes a sensor 11, which can be an acceleration sensor, a displacement sensor or a velocity sensor, and is used to monitor the vibration amplitude of the first structure and the second structure, and adjust the opening of the flow control valve 5 according to the monitoring data to achieve semi-active control of the damper. When the flow control valve 5 is closed, the flow of the damping fluid is restricted and the damping increases; when the flow control valve 5 is fully opened, the damping fluid can flow freely in the hydraulic cylinder chamber 2 to achieve a low damping response. The damping level can be adjusted by adjusting the position of the flow control valve 5 between fully open and fully closed.

[0046] The portion of the piston rod 3 extending into the energy conversion chamber 1 is connected to a ball screw 6, which can convert the translation of the piston rod 3 into rotational motion. At the same time, an electromagnetic motor 7 is also installed in the energy conversion chamber 1. The electromagnetic motor 7 is installed in the energy conversion chamber 1 at one end away from the hydraulic cylinder chamber 2 through a fixing member 13. The output end of the ball screw 6 is coaxially connected to the rotor of the electromagnetic motor 7. The magnetic flux lines of the electromagnetic motor 7 are cut by the rotational motion of the ball screw 6, so that the conversion of rotational kinetic energy into electrical energy can be completed.

[0047] In this embodiment, the damper is also equipped with an energy storage device 8. The energy storage device 8 is electrically connected to the electromagnetic motor 7 and is arranged on the energy conversion chamber 1, and is used to collect and store the electric energy converted by the electromagnetic motor 7 to provide energy for various components of the damper. The energy storage device 8 can be a supercapacitor or a lithium battery to meet the energy requirements under different working conditions.

[0048] The operating method of the self-powered semi-active viscous damper provided in this embodiment is as follows: the sensing unit is controlled to identify the vibration amplitude of the first structure and the second structure, and the flow control valve 5 is controlled to adjust the valve opening, thereby adjusting the amount of damping fluid passing through the bypass line 4 and changing the damping level; when the flow control valve 5 is closed, the flow of the damping fluid is restricted and the damping increases; when the flow control valve 5 is fully opened, the damping fluid can flow freely between the first hydraulic cylinder chamber 21 and the second hydraulic cylinder chamber 22 through the bypass line 4, thereby achieving a low damping response.

[0049] Under a vibration environment, the piston rod 3 moves horizontally, the ball screw 6 converts the translation of the piston rod 3 into rotational motion, the electromagnetic motor 7 converts the rotational kinetic energy into electrical energy and stores it in the energy storage device 8. The output end of the energy storage device is electrically connected to the control sensor unit, the control sensor unit is electrically connected to the flow control valve 5, and the energy storage device 8 provides energy for the regulation of the flow control valve 5 to achieve energy self-supply.

[0050] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A self-powered semi-active viscous damper, characterized in that: It comprises an energy conversion chamber (1), a hydraulic cylinder chamber (2), and a piston rod (3); the energy conversion chamber (1) and the hydraulic cylinder chamber (2) are sealed and connected; the piston rod (3) passes through the hydraulic cylinder chamber (2) and extends into the energy conversion chamber (1); The piston rod (3) is provided with a piston head (31), and the piston head (31) divides the hydraulic cylinder chamber (2) into a first hydraulic cylinder chamber (21) and a second hydraulic cylinder chamber (22) along the axial direction of the piston rod (3). Bypass pipelines (4) are provided on both sides of the hydraulic cylinder chamber (2). The first hydraulic cylinder chamber (21) and the second hydraulic cylinder chamber (22) are connected through the bypass pipeline (4), and a flow control valve (5) is provided on the bypass pipeline (4); The portion of the piston rod (3) extending into the energy conversion chamber (1) is provided with a ball screw (6) capable of converting the translational motion of the piston rod (3) into rotational motion, and the energy conversion chamber (1) is also provided with an electromagnetic motor (7) capable of converting rotational kinetic energy into electrical energy; The damper also includes an energy storage device (8) and a control sensor unit.

2. A self-powered semi-active viscous damper according to claim 1, characterized in that: A first piston shaft connector (9) is provided at one end of the piston rod (3) close to the hydraulic cylinder chamber (2), and a second piston shaft connector (10) is provided at one end of the energy conversion chamber (1) away from the hydraulic cylinder chamber (2). The damper is connected to the first structure and the second structure via the first piston shaft connector (9) and the second piston shaft connector (10). When the first structure and the second structure vibrate, the piston rod (3) moves in a translational manner along its axial direction.

3. A self-powered semi-active viscous damper according to claim 1, characterized in that: The control sensor unit is electrically connected to the flow control valve (5) and is capable of controlling the on / off state of the flow control valve (5).

4. A self-powered semi-active viscous damper according to claim 1, characterized in that: The control sensing unit comprises a sensor (11) capable of monitoring the vibration amplitude of the first structure and the second structure.

5. A self-powered semi-active viscous damper according to claim 4, characterized in that: The sensor (11) comprises an acceleration sensor, a displacement sensor or a velocity sensor.

6. A self-powered semi-active viscous damper according to claim 1, characterized in that: The hydraulic cylinder chamber (2) is filled with damping fluid, the energy conversion chamber (1) and the hydraulic cylinder chamber (2) are sealedly connected via a chamber connecting portion (12), and the chamber connecting portion (12) is provided with a through hole for the piston rod (3) to pass through the chamber connecting portion (12) and extend to the energy conversion chamber (1).

7. A self-powered semi-active viscous damper according to claim 1, characterized in that: The electromagnetic motor (7) is arranged at one end of the energy conversion chamber (1) away from the hydraulic cylinder chamber (2) via a fixing member (13); the output end of the ball screw (6) is coaxially connected to the rotor of the electromagnetic motor (7); the magnetic flux lines of the electromagnetic motor (7) are cut by the rotational movement of the ball screw (6), and the rotational kinetic energy is converted into electrical energy.

8. The self-powered semi-active viscous damper according to claim 1, characterized in that: The energy storage device (8) is arranged on the energy conversion chamber (1), is electrically connected to the electromagnetic motor (7), and can collect the electrical energy converted from the rotational kinetic energy of the electromagnetic motor (7), and supply energy to the damper.

9. The self-powered semi-active viscous damper according to claim 1, characterized in that: The energy storage device includes a super capacitor or a lithium battery.

10. A method for operating a self-powered semi-active viscous damper according to any one of claims 1 to 9, characterized in that: The control sensing unit identifies the vibration amplitude of the first structure and the second structure, controls the flow control valve (5) to adjust the valve opening, thereby adjusting the amount of damping fluid passing through the bypass pipeline (4) and changing the damping level; when the flow control valve (5) is closed, the flow of the damping fluid is restricted and the damping is increased; when the flow control valve (5) is fully opened, the damping fluid can flow freely between the first hydraulic cylinder chamber (21) and the second hydraulic cylinder chamber (22) through the bypass pipeline (4), thereby achieving a low damping response; In a vibrating environment, the piston rod (3) moves in a linear motion, the ball screw (6) converts the translation of the piston rod (3) into a rotational motion, the electromagnetic motor (7) converts the rotational kinetic energy into electrical energy and stores it in an energy storage device (8), and the energy storage device (8) provides energy for the flow control valve (5), thereby realizing energy self-supply.

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