A displacement-amplified inerter vibration absorber intelligent damping device

Abstract

The present invention relates to a displacement-amplified inertial absorber intelligent damping device, belonging to the field of engineering vibration control. It includes an inertial energy absorption component, an intelligent discrimination component, a damping energy dissipation component and a connection component; the inertial energy absorption component is mainly composed of an extension arm, a slideway, a protective shell, a lead screw, a lead screw nut and a mass block; the damping energy dissipation component includes a metal tube and a fan; the intelligent discrimination component includes a control terminal, a signal line and a motor; the connection component includes end plates arranged at the upper and lower ends of the controlled structure, an anchoring plate for anchoring the extension arm and bolts for realizing prefabricated assembly of each component. The present invention has the advantages of simple structure, convenient disassembly and installation, and low cost, and can significantly reduce the vibration between structures caused by wind loads, human-induced loads, vehicle-induced loads and seismic loads.

Description

Technical Field

[0001] The present invention relates to a damping device, in particular to a displacement-amplified inertia-capacitance vibration-absorbing intelligent damping device, belonging to the field of engineering vibration control. Background Art

[0002] With the rapid development of China's economy, civil engineering construction has also flourished, and building structures and bridge structures have been continuously developing towards larger, higher, and more complex directions. During the development of building structures and bridge structures, the problem of structural vibration has become increasingly prominent, and vibration has become an important factor affecting the safety and serviceability of building structures and bridge structures. For example, the collapse of buildings and bridges caused by seismic loads, the discomfort of buildings and bridges caused by wind loads, and the structural vibration caused by crowd loads and vehicle loads. And structural vibration control is one of the important ways to solve the problem of structural vibration. Therefore, structural vibration control has become an important direction of concern in the academic and engineering fields.

[0003] Structural vibration control can be divided into active, passive, and semi-active control. Active control requires a large amount of external energy input, with a complex implementation process and high cost; semi-active control overcomes the disadvantage of large energy required for active control to a certain extent, but there are also prominent problems such as complex structure and control process, and great difficulties in optimal design and vibration reduction analysis; passive control has the advantages of low cost, simple structure, and good robustness, but it also has problems such as a narrow effective control bandwidth and a large time delay in control effect. Therefore, proposing a structural vibration control device with a simple structure, good control effect, and low cost has always been a research hotspot for scholars at home and abroad.

[0004] The inertia-capacitance device can use acceleration amplification to make a small mass provide a large inertia, and has good application prospects in the field of structural vibration control. However, the traditional inertia-capacitance device itself has weak dissipation ability, and when other passive energy dissipation devices are set on the inertia-capacitance device, the energy absorption effect of the inertia-capacitance device will be weakened.

[0005] For example, CN117905844A discloses a pulley assembly displacement-amplified tuned mass inertia-capacitance damper. The damper includes a tuned mass inertia-capacitance damper body arranged on the controlled object. The tuned mass inertia-capacitance damper body includes a first driving device, a damping control system, a second driving device, and an intelligent control system. The damping control system is connected to the first driving device and the second driving device respectively through a pulley group. The present invention amplifies the relative displacement between the TMD and the bridge by setting a pulley group, but the working efficiency of the actual damper has not been effectively improved, and the energy absorption and energy dissipation capabilities cannot be effectively balanced.

[0006] Therefore, the balance problem between energy absorption and energy dissipation has always been the key restricting the popularization and application of inertia-capacitance devices, and an inertia-capacitance damping device with excellent energy absorption and energy dissipation capabilities is urgently needed to be proposed. Summary of the Invention

[0007] In view of the above-mentioned defects existing in the prior art, the present invention proposes a displacement-amplified inertia-capacitor vibration-absorbing intelligent damping device, aiming to overcome problems such as the difficulty in balancing energy absorption and energy consumption of the inertia-capacitor damping device. It can not only absorb a large amount of energy in the initial stage of functioning, but also play an effective energy-consuming role after the device absorbs a large amount of energy, and has excellent energy absorption and energy consumption capabilities.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A displacement-amplified inertia-capacitor vibration-absorbing intelligent damping device includes an inertia-capacitor energy-absorbing component, an intelligent discrimination component, a damping energy-consuming component, and a connection component;

[0010] The inertia-capacitor energy-absorbing component mainly consists of an extension arm, a slideway, a protective shell, a lead screw, a lead screw nut, and a mass block;

[0011] The connection component includes end plates arranged at the upper and lower ends of the controlled structure, an anchor plate for anchoring the extension arm, and bolts for realizing prefabricated assembly of each component;

[0012] The lead screw nut is sleeved on the lead screw and used in cooperation with the lead screw. The upper end of the protective shell is anchored to the lead screw nut by bolts, and the lower end of the protective shell is anchored to the lower end plate by bolts; lead screw baffles are arranged at both the top and bottom of the lead screw. The lead screw baffle at the top of the lead screw is arranged on the end plate at the upper end of the controlled structure; one extension arm is anchored on each of the left and right sides of the lead screw by an anchor plate and bolts; the extension arm is provided with a slideway, and a mass block is arranged on the slideway; the lead screw nut has internal threads and is used in cooperation with the threaded lead screw. There are also ball bearings between them, which convert the vertical movement of the damping device into horizontal rotation; a layer of polytetrafluoroethylene is laid around the lead screw baffle at the top of the lead screw, which constitutes a sliding friction surface with the lead screw baffle to reduce the friction force when the lead screw rotates;

[0013] The intelligent discrimination component includes a control terminal, a signal line, and a motor. The control terminal is arranged on the mass block of one side extension arm to monitor the acceleration amplitude and control the start and stop of the motor; one end of the motor is connected to the control terminal, and the other end is connected to the damping energy-consuming component through a signal line;

[0014] The damping energy-consuming component includes a metal tube and a fan. One end of the metal tube is fixed on the extension arm, and the other end is provided with a fan.

[0015] Further, stoppers are arranged at both ends of the mass block to limit the horizontal displacement of the mass block.

[0016] Furthermore, the control terminal is composed of a control chip, an acceleration sensor, and a trigger switch. The control terminal and the motor and the fan are respectively arranged on the outrigger arms on both sides, connected by a signal line in the middle, and the acceleration is monitored through the acceleration monitoring program in the control chip of the control terminal. When the acceleration reaches the set critical value, the motor is started, causing the fan to start moving and consuming energy, achieving the effect of absorbing energy with a small vibration inertia and dissipating energy with a large damping.

[0017] Furthermore, the slideway is used to reduce the friction force received by the mass block during the sliding process, that is, the initial energy absorption process.

[0018] Furthermore, the mass block has a rectangular cross-section.

[0019] Furthermore, the material of the slideway is polytetrafluoroethylene or steel; the material of the mass block is steel, aluminum alloy, or copper alloy. The contact between the two forms a sliding friction surface to prevent energy dissipation when the mass block slides, ensuring that the device mainly functions as energy absorption in the initial stage; the bolt is a high-strength anchoring bolt.

[0020] Furthermore, the end plate on the upper part of the connection component is two-layered. The position of the lead screw is fixed by setting the hole sizes in the centers of the two steel plates, while satisfying the rotation of the lead screw. The upper steel plate functions to reserve enough space for the lead screw baffle at the upper end of the lead screw.

[0021] When the controlled structure vibrates under the action of human-induced loads, vehicle-induced loads, seismic loads, or wind loads, relative displacements occur between the upper end plate and the lower end plate anchored to the controlled structure. The upper end plate will cause the lead screw to have a tendency of longitudinal movement. However, due to the existence of the lead screw nut and the ball bearings arranged in the lead screw nut, the vertical movement of the lead screw is converted into horizontal rotation. At the same time, the lead screw drives the outrigger arm and the mass block on the outrigger arm anchored to it to rotate together. The position of the mass block does not change due to the fixing effect of the two end blocks at both ends. The polytetrafluoroethylene around the lead screw baffle at the upper end of the lead screw and the lead screw baffle form a sliding friction surface, which can reduce the friction force received when the lead screw rotates, ensuring the smooth rotation of the lead screw to achieve inertia energy absorption. If you want to adjust the inertia size, you can adjust the number and position of the mass blocks; when the vibration of the controlled structure reaches a certain level, the value of the control terminal on the mass block will reach the acceleration critical value. At this time, the motor is judged to be started through the control chip, causing the fan connected to the motor to start rotating, realizing the dissipation of energy and reducing the vibration amplitude of the controlled structure; during the whole movement process, the protective shell plays a supporting role and provides enough space for the rotation of the lead screw.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides a novel displacement-amplified inertia-capacitance vibration-absorbing intelligent damping device, which can absorb a large amount of energy in the initial stage of its operation and can also play an effective energy-dissipating role after a large amount of energy absorption by the device, having excellent energy absorption and energy dissipation capabilities.

[0024] The present invention can be prefabricated and assembled, accurately calculated, processed and assembled in the factory, having advantages such as high-precision dimensions and shapes. Compared with on-site construction, construction errors are reduced, and the building quality and safety are improved. At the same time, the inertia capacitance can be adjusted according to the vibration (shock) reduction requirements of the structure to be installed by adjusting the number and position of the mass blocks, with better adaptability. The present invention introduces intelligent discrimination technology and fan damping technology into the inertia capacitance device. When the controlled structure generates small vibrations under the action of a load, the upper end plate and the lower end plate connected to the controlled structure generate relative displacements. At this time, the lead screw connected to the baffle converts the longitudinal displacement of the structure into rotation through the lead screw nut and the balls arranged in the lead screw nut. Furthermore, the lead screw drives the outrigger anchored to it to rotate together. A layer of polytetrafluoroethylene is laid around the upper end baffle of the lead screw to form a sliding friction surface with the upper end baffle of the lead screw, which can reduce the frictional force received when the lead screw rotates and ensure the smooth rotation of the lead screw to achieve inertia capacitance energy absorption. When the vibration of the controlled structure reaches a certain level, the value of the acceleration sensor at the control terminal will reach the set value, and the trigger switch is judged to be turned on through the control chip, so that the damping energy dissipation component starts to work, realizing the dissipation of energy and reducing the vibration amplitude of the controlled structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a displacement-amplified inertia-capacitance vibration-absorbing intelligent damping device of the present invention;

[0026] Figure 2 is of the present invention Figure 1 a sectional view of the A-A section at the position of the end plate at the upper part of the structure in;

[0027] Figure 3 is of the present invention Figure 1 a sectional view of the B-B section at the position of the outrigger of the structure in;

[0028] Figure 4 is of the present invention Figure 1 a schematic structural diagram of the intelligent discrimination component of the structure in;

[0029] Figure 5 is of the present invention Figure 1 a sectional view of the C-C section at the position of the lead screw nut of the structure in;

[0030] Figure 6 is of the present invention Figure 1 a sectional view of the D-D section at the position of the lower end plate of the structure in. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will further elaborate on the present invention in conjunction with the appended Figures 1-6 drawings and specific embodiments for a clearer understanding of the present invention, but they do not limit the present invention.

[0032] Embodiment 1

[0033] As shown in the appended Figures 1-6 drawings, a displacement-amplified inertia-capacitance vibration-absorbing intelligent damping device in this embodiment includes an inertia-capacitance energy-absorbing component, an intelligent discrimination component 100, a damping energy-consuming component, and a connection component;

[0034] Specifically, in this embodiment, the inertia-capacitance energy-absorbing component mainly consists of an extension arm 9, a slideway 4, a protective shell 16, a lead screw 14, a lead screw nut 13, and a mass block 2. The connection component includes end plates 17 provided at the upper and lower ends of the controlled structure, an anchoring plate 8 for anchoring the extension arm 9, and bolts 18 for realizing prefabricated assembly of each component. The lead screw nut 13 is sleeved on the lead screw 14 and used in cooperation with the lead screw 14. The upper end of the protective shell 16 is anchored to the lead screw nut 13 by bolts 18, and the lower end of the protective shell 16 is anchored to the lower end plate 17 by bolts 18. The lead screw nut 13 has internal threads and is used in cooperation with the threaded lead screw 14. A ball 12 is also provided between them to reduce friction, increase transmission efficiency and accuracy, and convert the vertical movement of the damping device into horizontal rotation. Screw baffles 15 are provided at both the top and bottom of the lead screw 14, and the screw baffle 15 at the top of the lead screw 14 is arranged on the end plate 17 at the upper end of the controlled structure. One extension arm 9 is anchored on each of the left and right sides of the lead screw 14 by an anchoring plate 8 and bolts 18. The extension arm 9 is provided with a slideway 4, and a mass block 2 is arranged on the slideway 4. The slideway 4 is used to reduce the friction force received by the mass block 2 during the sliding process, that is, the initial energy-absorbing process. As Figure 1 and Figure 3 shown, stoppers 5 are provided at both ends of the mass block 2 to limit the horizontal displacement of the mass block 2.

[0035] In addition, a layer of polytetrafluoroethylene 1 is laid around the screw baffle 15 at the top of the lead screw 14, which forms a sliding friction surface with the screw baffle 15 to reduce the friction force received by the lead screw 14 during rotation. As Figure 1 shown, the upper end plate 17 of the connection component is two-layered, and the position of the lead screw 14 is fixed by setting the sizes of the central holes of the two-layer steel plates, while ensuring that the lead screw 14 can rotate. The upper steel plate is used to reserve enough space for the screw baffle 15 at the upper end of the lead screw 14.

[0036] In this embodiment, the intelligent discrimination component includes a control terminal 3, a signal line 11, and a motor 6. The control terminal 3 is arranged on the mass block 2 of one extension arm to monitor the acceleration amplitude and control the start and stop of the motor 6. One end of the motor 6 is connected to the control terminal 3, and the other end is connected to the damping energy-consuming component through the signal line 11.

[0037] As Figure 4 shown, the control terminal 3 consists of a control chip 31, an acceleration sensor 32 and a trigger switch 33. The control terminal 3 and the motor 6 and the fan 10 are respectively arranged on the outer extension arms 9 on both sides, and are connected by a signal line 11 in the middle. The acceleration monitoring program in the control chip 31 of the control terminal 3 is used to monitor the acceleration. When the acceleration reaches the set critical value, the motor 6 is started, so that the fan 10 starts to move and consume energy, achieving the effect of absorbing energy with a small vibration inertia and consuming energy with a large vibration damping.

[0038] The damping energy consumption component includes a metal tube 7 and a fan 10. One end of the metal tube 7 is fixed on the outer extension arm 9, and the fan 10 is arranged at the other end.

[0039] In this embodiment, the mass block 2 has a rectangular cross-section. The material of the slideway 4 is polytetrafluoroethylene. The material of the mass block 2 is steel. The two are in contact to form a sliding friction surface to prevent the mass block 2 from dissipating energy when sliding, ensuring that the device mainly functions as an energy absorber in the initial stage. The bolt 18 is a high-strength anchor bolt.

[0040] Specifically, the working principle of the present invention is as follows:

[0041] When the controlled structure vibrates under the action of human-induced load, vehicle-induced load, seismic load or wind load, the upper end plate 17 and the lower end plate 17 anchored to the controlled structure generate relative displacement. The upper end plate 17 will cause the lead screw 14 to have a tendency of longitudinal movement. However, due to the presence of the lead screw nut 13 and the balls 12 arranged in the lead screw nut, the vertical movement of the lead screw 14 is converted into horizontal rotation. At the same time, the lead screw 14 drives the outer extension arm 9 anchored to it and the mass block 2 on the outer extension arm 9 to rotate together. The position of the mass block 2 does not change due to the fixing effect of the two end blocks 5 at both ends. The polytetrafluoroethylene 1 around the lead screw baffle 15 at the upper end of the lead screw 14 forms a sliding friction surface with the lead screw baffle 15, which can reduce the friction force when the lead screw 14 rotates, ensuring the smooth rotation of the lead screw 14 to achieve inertia energy absorption. If you want to adjust the inertia size, you can adjust the number and position of the mass blocks 2. When the vibration of the controlled structure reaches a certain level, the value of the control terminal 3 on the mass block 2 will reach the acceleration critical value. At this time, the motor 6 is judged to be started through the control chip 31, so that the fan 10 connected to the motor 6 starts to rotate, realizing the dissipation of energy and reducing the vibration amplitude of the controlled structure. During the whole movement process, the protective shell 16 plays a supporting role and provides enough space for the rotation of the lead screw 14.

[0042] Embodiment 2

[0043] In this embodiment, the material of the slideway 4 is steel. The material of the mass block 2 is aluminum alloy. Other structures and connection methods are the same as those in Embodiment 1 and will not be described in detail here.

[0044] The above are only the preferred embodiments of the present invention, and do not impose any formal restrictions on the structure of the present invention. The arrangement type and the number of uses of the present invention are not limited to this example either, and can be optimized according to the actual engineering situation. Any modification, equivalent change and decoration made to the above embodiments based on the technical principle of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A displacement amplification inertia vibration absorption intelligent damping device, characterized in that: Including inertia capacity energy absorption components, intelligent identification components, damping energy dissipation components and connection components; The inertia capacity energy absorption assembly mainly consists of an outrigger arm (9), a slideway (4), a protective shell (16), a lead screw (14), a lead screw nut (13) and a mass block (2); The connection assembly comprises end plates (17) arranged at the upper and lower ends of the controlled structure, anchor plates (8) for anchoring the outriggers (9), and bolts (18) for prefabricating and assembling the components; The lead screw nut (13) is sleeved on the lead screw (14) and used in conjunction with the lead screw (14); the upper end of the protective shell (16) is anchored to the lead screw nut (13) by means of bolts (18); the lower end of the protective shell (16) is anchored to the lower end plate (17) by means of bolts (18); the lead screw baffle (15) is provided at the top and bottom ends of the lead screw (14); the lead screw baffle (15) at the top end of the lead screw (14) is provided on the end plate (17) at the upper end of the controlled structure; the left and right sides of the lead screw (14) are respectively connected by means of anchor plates (8) and bolts (18); 8) is anchored with an outrigger (9); the outrigger (9) is provided with a slideway (4), and a mass block (2) is provided on the slideway (4); the lead screw nut (13) has a thread inside, and is used in conjunction with a threaded lead screw (14), and a ball (12) is provided between the two, and the vertical movement of the damping device is converted into horizontal rotation; a layer of polytetrafluoroethylene (1) is laid around the lead screw baffle (15) at the top of the lead screw (14), and the polytetrafluoroethylene (1) and the lead screw baffle (15) form a sliding friction surface, so as to reduce the friction force on the lead screw (14) when it rotates; The intelligent discrimination component comprises a control terminal (3), a signal line (11) and a motor (6); the control terminal (3) is arranged on a side outrigger mass block (2) to monitor the acceleration amplitude and control the start and stop of the motor (6); one end of the motor (6) is connected to the control terminal (3), and the other end is connected to the damping energy dissipation component via the signal line (11); The energy-dissipating damping component comprises a metal tube (7) and a fan (10); one end of the metal tube (7) is fixed to an outrigger arm (9), and the other end is provided with the fan (10).

2. The displacement amplification inertia vibration absorption intelligent damping device according to claim 1 is characterized by: Stoppers (5) are provided at both ends of the mass block (2) for limiting the horizontal displacement of the mass block (2).

3. The displacement amplification inertia vibration absorption intelligent damping device according to claim 2 is characterized by: The control terminal (3) is composed of a control chip (31), an acceleration sensor (32) and a trigger switch (33). The control terminal (3), the motor (6) and the fan (10) are respectively arranged on the outrigger arms (9) on both sides and are connected via a signal line (11). The acceleration is monitored by an acceleration monitoring program in the control chip (31) of the control terminal (3). When the acceleration reaches a set critical value, the motor (6) is turned on to start the fan (10) to start moving and consuming energy, thereby achieving the effect of absorbing energy by inertia of small vibrations and consuming energy by damping of large vibrations.

4. The displacement amplification inertia vibration absorption intelligent damping device according to claim 1 is characterized by: The slideway (4) is used to reduce the friction force applied to the mass block (2) during the sliding process, that is, during the initial energy absorption process.

5. The displacement amplification inertia vibration absorption intelligent damping device according to claim 1 is characterized by: The mass block (2) has a rectangular cross section.

6. The displacement amplification inertia vibration absorption intelligent damping device according to claim 1 is characterized by: The slideway (4) is made of polytetrafluoroethylene and steel; the mass block (2) is made of steel, aluminum alloy, and copper alloy; the two are in contact with each other to form a sliding friction surface, thereby preventing the mass block (2) from dissipating energy when sliding, and ensuring that the device mainly absorbs energy in the initial stage; the bolt (18) is a high-strength anchor bolt.

7. The displacement amplification inertia vibration absorption intelligent damping device according to claim 1 is characterized by: The end plate (17) at the upper part of the connecting assembly is composed of two layers, and the position of the lead screw (14) is fixed by setting the size of the central opening of the two layers of steel plates, while ensuring that the lead screw (14) can rotate. The steel plate above it serves to reserve sufficient space for the lead screw baffle (15) at the upper end of the lead screw (14).

8. The displacement amplification inertia vibration absorption intelligent damping device according to claim 1 is characterized by: When the controlled structure vibrates under the action of human load, vehicle load, earthquake load or wind load, the upper end plate (17) and the lower end plate (17) anchored to the controlled structure produce relative displacement, and the upper end plate (17) causes the lead screw (14) to have a tendency to move longitudinally. However, due to the presence of the lead screw nut (13) and the balls (12) arranged in the lead screw nut, the vertical movement of the lead screw (14) is converted into horizontal rotation. At the same time, the lead screw (14) drives the outrigger arm (9) anchored thereto and the mass block (2) on the outrigger arm (9) to rotate together. The mass block (2) does not change its position due to the fixing action of the blocks (5) at both ends, and the polytetrafluoroethylene (PTFE) around the lead screw baffle (15) at the upper end of the lead screw (14) is The fluoroethylene (1) and the lead screw baffle (15) form a sliding friction surface, which can reduce the friction force on the lead screw (14) when it rotates, ensure the smooth rotation of the lead screw (14) and realize inertia energy absorption. If the inertia size is to be adjusted, the number and position of the mass blocks (2) can be adjusted. When the vibration of the controlled structure reaches a certain level, the value of the control terminal (3) on the mass block (2) will reach the acceleration critical value. At this time, the control chip (31) determines to start the motor (6), so that the fan (10) connected to the motor (6) starts to rotate, realizes energy dissipation, and reduces the vibration amplitude of the controlled structure. The protective shell (16) plays a supporting role in the whole movement process and provides sufficient space for the rotation of the lead screw (14).

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