Damping device

Abstract

The utility model discloses a damping device which comprises a frame body, and a mass ball is arranged in the frame body. The bottom end of the swing arm mechanism is connected with the mass ball; one end of the damping assembly is connected with the mass ball, the other end of the damping assembly is connected with the frame body, the damping assembly comprises a spring tube, and magnetorheological fluid is arranged in the spring tube; according to the damping device, on the basis that it is ensured that the simple pendulum tuned mass damper gives full play to the energy dissipation and damping effect, the characteristic that the electrified fluid property of the magnetorheological fluid changes is utilized, residual swing energy generated after an earthquake is actively absorbed, the energy dissipation and damping effect is improved, and the damping effect is improved. The movement is stopped in time, residual swing energy can be quickly absorbed after an earthquake is finished, and secondary damage to a building structure is effectively prevented.

Description

Technical Field

[0001] This application is used in the technical field of engineering structure vibration reduction, and particularly relates to a shock absorption device. Background Art

[0002] Earthquakes are the biggest natural disasters in human history. There are about more than 5 million earthquakes occurring on Earth every year, that is, tens of thousands of earthquakes occur every day. With the current technological level, the occurrence of earthquakes cannot be predicted, and the losses caused by earthquakes are huge. This includes the number of collapsed, severely damaged, and generally damaged houses. The economic losses caused by earthquakes are all-round, including both the direct damage to physical assets and the indirect losses of social and economic resources required for post-disaster recovery and reconstruction. Therefore, the measure to minimize earthquake disaster losses is isolation and shock absorption. Thus, the single pendulum damper with low cost is widely used. However, the shock absorption effect of the existing single pendulum damper is limited. Moreover, after an external excitation such as an earthquake ends, due to inertia, the mass ball will continue to swing. The traditional single pendulum damper lacks an effective mechanism to stop this residual swing in time, and this residual swing may cause secondary damage to the building structure. Summary of the Utility Model

[0003] The purpose of this application is to solve at least one of the technical problems existing in the prior art, and to provide a shock absorption device that can quickly absorb the residual swing energy after an earthquake and effectively prevent secondary damage to the building structure.

[0004] The technical solution adopted by this application to solve its technical problems is:

[0005] A shock absorption device, comprising

[0006] A frame body, inside which a mass ball is provided;

[0007] A swing arm mechanism, the bottom end of which is connected to the mass ball;

[0008] A shock absorption component, one end of which is connected to the mass ball and the other end is connected to the frame body. The shock absorption component includes a spring tube, and a magnetorheological fluid is provided inside the spring tube;

[0009] An elastic limiting member, one end of which is connected to the frame body and the other end is connected to the mass ball.

[0010] In some embodiments of this application, the elastic limiting member includes an elastic pull rope, and the elastic pull rope is arranged to overlap with the shock absorption component.

[0011] In some embodiments of this application, the distance between the mass ball and the frame body is greater than the elastic limit length of the elastic pull rope.

[0012] In some embodiments of the present application, a plurality of shock absorption components are provided, and the plurality of shock absorption components are arranged divergently along the outer periphery of the mass ball.

[0013] In some embodiments of the present application, the frame body is a cuboid, and the end of the shock absorption component is connected to the vertex of the frame body.

[0014] In some embodiments of the present application, a connecting component is included, and the connecting component is connected to the top end of the swing arm mechanism.

[0015] In some embodiments of the present application, the swing arm mechanism includes a first connecting rod, a second connecting rod, and a lifting and adjusting component. The top end of the first connecting rod is connected to the connecting component, the bottom end of the first connecting rod is connected to the lifting and adjusting component, the top end of the second connecting rod is connected to the lifting and adjusting component, and the bottom end of the second connecting rod is connected to the mass ball.

[0016] In some embodiments of the present application, the lifting and adjusting component includes a first connecting piece connected to the bottom end of the first connecting rod and a second connecting piece connected to the top end of the second connecting rod. A screw is provided on the first connecting piece, and the second connecting piece includes a nut that cooperates with the screw.

[0017] In some embodiments of the present application, a first connecting ring is provided at the bottom of the connecting component, and a second connecting ring is provided at the top of the first connecting rod. The first connecting ring and the second connecting ring are connected by buckling.

[0018] In some embodiments of the present application, the spring tube is made of a metal material, and a live wire is connected to the spring tube.

[0019] At least one of the following advantages or beneficial effects exists in one of the above technical solutions: When an earthquake occurs, the shock absorption components of this shock absorption device are not energized. At this time, the magnetorheological fluid presents a Newtonian fluid state and does not hinder the swinging of the mass ball. At this time, the elastic limiting member provides restraint and damping, and the shock absorption device plays a normal shock absorption role; after the earthquake ends and the building structure stops vibrating, the magnetorheological fluid transforms into a Bingham fluid with high viscosity and low fluidity, increasing the elastic force of the spring tube, thereby effectively absorbing the kinetic energy of the mass ball, achieving active energy dissipation, and preventing the inertial force of the pendulum from causing secondary loads on the building structure. This shock absorption device utilizes the magnetorheological fluid to actively absorb the residual energy of the pendulum damper after an earthquake. On the basis of ensuring that the single pendulum mass-tuned damper fully exerts its energy dissipation and shock absorption effect, this shock absorption device utilizes the characteristic of the change in the current-carrying fluid properties of the magnetorheological fluid to actively absorb the residual swinging energy after the earthquake, stop the movement in a timely manner, and can quickly absorb the residual swinging energy after the earthquake ends, effectively preventing secondary damage to the building structure.

[0020] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where:

[0022] Figure 1 is a longitudinal sectional view of an embodiment of the present application;

[0023] Figure 2 is a transverse sectional view of an embodiment of the present application;

[0024] Figure 3 is one of the schematic structural views of a shock absorption assembly in an embodiment of the present application;

[0025] Figure 4 is another schematic structural view of a shock absorption assembly in an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] This part will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it should not be construed as a limitation on the protection scope of the present application.

[0027] In the present application, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of the present application, rather than indicating or implying that the technical features referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0028] In the present application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, and understandings such as "greater than", "less than", and "exceeding" do not include the recited number; understandings such as "above", "below", and "within" include the recited number. In the description of the present application, if "first" and "second" are described, they are only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0029] In this application, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection" shall be understood in a broad sense. For example, it can be directly connected or indirectly connected through an intermediate medium; it can be a fixed connection, a detachable connection, or integrally formed; it can be a mechanical connection, an electrical connection, or capable of communicating with each other; it can be the communication inside two components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this application in combination with the specific content of the technical solution.

[0030] An embodiment of the present application provides a shock absorption device. Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , which includes a frame body 200, a swing arm mechanism 300, a shock absorption component 400, and an elastic limiting member 500. A mass ball 210 is provided inside the frame body 200. The bottom end of the swing arm mechanism 300 is connected to the mass ball 210. One end of the shock absorption component 400 is connected to the mass ball 210, and the other end is connected to the frame body 200. The shock absorption component 400 includes a spring tube 410, and a magnetorheological fluid 420 is provided inside the spring tube 410. One end of the elastic limiting member 500 is connected to the frame body 200, and the other end is connected to the mass ball 210.

[0031] When an earthquake occurs, the shock absorption component 400 is not energized. At this time, the magnetorheological fluid 420 presents a Newtonian fluid state and does not hinder the swing of the mass ball 210. At this time, the elastic limiting member 500 provides restraint and damping, and the shock absorption device plays a normal shock absorption role. After the earthquake ends, the building structure (the structure to be shock-absorbed) stops vibrating. At this time, the magnetorheological fluid 420 turns into a Bingham fluid with high viscosity and low fluidity, increasing the elastic force of the spring tube 410, thereby effectively absorbing the kinetic energy of the mass ball 210, realizing active energy consumption, and preventing the inertial force of the pendulum from causing secondary loads to the building structure (the structure to be shock-absorbed). This shock absorption device uses the magnetorheological fluid 420 to actively absorb the residual energy of the pendulum-type damper after the earthquake. On the basis of ensuring that the pendulum mass-tuned damper fully exerts its energy-dissipating and shock-absorbing effect, it uses the characteristic of the change in the current-carrying fluid properties of the magnetorheological fluid to actively absorb the residual swing energy after the earthquake, stop the movement in time, and effectively solve the problem that the pendulum-type damper continues to swing after the earthquake and causes secondary damage to the structure, and can quickly absorb the residual swing energy after the earthquake and effectively prevent secondary damage to the building structure.

[0032] Specifically, the magnetorheological fluid is a magnetorheological fluid (MRF) prepared using carbonyl iron powder. The magnetorheological fluid (Magnetorheological Fluid, abbreviated as MRF) is a controllable new type of intelligent fluid mainly used in the present invention to absorb energy. It is formed by dispersing near-nanoscale magnetic particles in a non-magnetic carrier fluid. The MRF of this device uses carbonyl iron powder with a relatively large magnetic saturation as the magnetic particles, uses synthetic oil as the base fluid, and adds an appropriate amount of dispersant to improve the redispersibility of the fluid, so that the MRF has stable performance and a longer action time. It can be understood that the synthetic oil constituting the magnetorheological fluid should densely fill the entire bellows 410. Specifically, the synthetic oil (such as polyalphaolefin) has excellent lubrication characteristics and additive compatibility, and its chemical properties are stable. It is a commonly used base fluid for magnetorheological fluids in engineering. The magnetorheological fluid has stable performance and can instantaneously change from a Newtonian fluid to a plastic fluid with a relatively high shear yield ability under the action of an electromagnetic field, and this transformation is continuous and reversible. In addition, the magnetorheological fluid is simple to manufacture, has a uniform phase change and is extremely fast, and the anti-shear damping force is evenly distributed. Therefore, it is widely used in the field of shock absorption and can also play an emergency braking role. The magnetorheological fluid in this application also contains carbonyl iron powder (carbonyl powder), which is a powder prepared by thermally dissociating metal carbonyl compounds. It can generate a relatively large magnetic dipole moment under the action of a magnetic field, making the magnetorheological fluid have a relatively high shear yield strength under a medium magnetic field intensity. Moreover, the high magnetic permeability of the carbonyl iron powder results in a relatively low magnetic resistance in the entire closed loop of the magnetorheological fluid, driving more magnetic induction lines to pass through the magnetorheological fluid, increasing the magnetic induction intensity and response time of the magnetorheological fluid. Under the action of an external magnetic field, the carbonyl iron powder particles quickly form a chain-like structure in the synthetic oil, preventing the liquid from flowing, thereby significantly increasing the yield stress of the magnetorheological fluid. This transformation time is extremely short and reversible, making the magnetorheological fluid have extremely high application value in dynamic control systems. In the prior art, damping materials (such as rubber) used in dampers may experience problems such as performance degradation and aging during long-term use, resulting in a decrease in damping effect. In this application, the use of magnetorheological fluid solves this problem.

[0033] In some embodiments, the elastic limiting member 500 includes an elastic drawstring. The elastic drawstring is arranged to coincide with the shock absorption assembly 400, that is, the axis of the elastic drawstring coincides with the axis of the bellows 410. The inner material of the elastic drawstring uses high-strength latex silk, and the outer material uses polyester high-elastic waterproof yarn. The amount of latex silk in the inner core of the elastic drawstring is determined according to the mass of the mass ball 210. The two ends of the elastic drawstring are respectively connected to the mass ball and the solid boundary. 8 elastic drawstrings can provide a certain amount of damping to prevent the mass ball 210 from swinging too large from all angles.

[0034] In some embodiments, the distance between the mass ball 210 and the frame 200 is greater than the elastic limit length of the elastic drawstring, preventing the mass ball 210 from colliding with the frame 200 and solving the impact accidents caused by excessive swing amplitude in existing shock absorption devices. The elastic drawstring can limit the swing amplitude to a certain extent when not powered, and its strong resilience can better cooperate with the bellows 410 to complete the energy absorption process when powered.

[0035] In some embodiments, there are multiple shock absorption components 400, and the multiple shock absorption components 400 are arranged divergently along the outer periphery of the mass ball 210.

[0036] In some embodiments, the frame 200 is a cuboid, and the ends of the shock absorption components 400 are connected to the vertices of the frame 200, and the frame 200 forms a metal boundary. It can be understood that at this time, there are 8 shock absorption components 400 and elastic limiters 500, that is, the spatial distribution of the connection between the mass ball 210 and the bellows 410 and the natural drawstring is octahedral orthogonal connection. The shock absorption components 400 can actively absorb the residual swing energy after the earthquake, enabling the mass ball 210 to stop moving in time and effectively solving the problem of secondary damage to the structure caused by the continued swing of the single pendulum damper after the earthquake.

[0037] The shock absorption device includes a connecting component 100. The connecting component 100 is connected to the top end of the swing arm mechanism 300. The connecting component 100 of the shock absorption device can be embedded inside the component to be shock-absorbed, facilitating the installation and use of the shock absorption device. The connecting component 100 is a metal plate.

[0038] In some embodiments, the swing arm mechanism 300 is a rigid swing arm, and the length of the rigid swing arm satisfies the pendulum length at the same frequency as the building structure (the structure to be shock-absorbed). The swing arm mechanism 300 includes a first connecting rod 310, a second connecting rod 320, and a lifting and adjusting component 330. The top end of the first connecting rod 310 is connected to the connecting component 100, the bottom end of the first connecting rod 310 is connected to the lifting and adjusting component 330, the top end of the second connecting rod 320 is connected to the lifting and adjusting component 330, and the bottom end of the second connecting rod 320 is connected to the mass ball 210. During use, the lifting and adjusting component 330 needs to be adjusted to an appropriate height, and the pendulum length can be adjusted according to the change in the natural vibration frequency of the building structure (the structure to be shock-absorbed) at different times to maintain the best shock absorption effect of the shock absorption device. It can be understood that the first connecting rod 310 and the second connecting rod 320 are made of hard high-strength alloy steel.

[0039] In some embodiments, the lifting and adjusting assembly 330 is a screw lifting device. The change in the pendulum length of the lifting and adjusting assembly 330 should not be too large. Using a screw lifting device can meet the conditions and can adjust the length of the swing arm mechanism 300, enabling the frequency of the shock absorption device to adapt to the frequencies of different building structures, thereby achieving the best shock absorption effect. The lifting and adjusting assembly 330 includes a first connector connected to the bottom end of the first connecting rod 310 and a second connector connected to the top end of the second connecting rod 320. A screw is provided on the first connector, and the second connector includes a nut that mates with the screw to adjust the single pendulum frequency, thereby achieving the optimal shock absorption effect with building resonance.

[0040] Since the shock absorption effect of the single pendulum damper highly depends on the consistency between its natural vibration frequency and the control frequency of the building structure. In practical applications, the frequency of the building structure may change due to various factors (such as cumulative damage, change in usage function, etc.), resulting in the frequency detuning between the damper and the building structure, thereby affecting its shock absorption performance. By adjusting the length of the swing arm mechanism 300 through the lifting and adjusting assembly 330, it can be adjusted in real time according to the change in the natural vibration frequency of the building structure, improving the shock absorption performance of the shock absorption device.

[0041] In some embodiments, a first connection ring 110 is provided at the bottom of the connection component 100, and a second connection ring 311 is provided at the top of the first connecting rod 310. The first connection ring 110 and the second connection ring 311 are connected in a buckled manner. Both the first connection ring 110 and the second connection ring 311 are made of smooth hard wear-resistant alloy steel. In other words, the first connection ring 110 and the second connection ring 311 are prefabricated in a cross-buckled form by welding. The first connection ring 110 is fixed in the connection component 100 at the top by screws or welding supports.

[0042] In some embodiments, the spring tube 410 is made of a metal material, and a conductive coil 411 is wound around the spring tube 410. In other words, current conducting coils are evenly wound around the outer walls of the 8 spring tubes. All the current conducting coils are connected in parallel to an external current control device. The tubes of the 8 spring tubes 410 are filled with magnetorheological fluid. At the end of an earthquake, the current is adjusted through a current regulator to cause the magnetorheological fluid to produce a magnetorheological fluid effect and transform into a fluid with high shear resistance and high viscosity.

[0043] Current energy consumption devices are added to the shock absorption device in all directions of the frame 200. By changing the physical properties of the magnetorheological fluid through current, the stiffness of the mass ball 200 is increased to stop its swinging.

[0044] When an earthquake occurs, no current flows through all the current conducting coils of the shock absorber. At this time, the magnetorheological fluid 420 presents a Newtonian fluid state and does not hinder the swinging of the mass ball 210. At this time, the elastic pull rope provides restraint and damping, and the shock absorber plays a normal shock absorption role. After the earthquake ends, the building structure (the structure to be shock-absorbed) stops vibrating. At this time, the controller controls the coil to generate current to make the MRF produce a magnetorheological fluid effect, and the magnetorheological fluid 420 changes into a Bingham fluid with high viscosity and low fluidity, increasing the elastic force of the bellows 410, thereby effectively absorbing the kinetic energy of the mass ball 210, realizing active energy consumption, and preventing the inertial force of the pendulum from causing secondary loads to the building structure (the structure to be shock-absorbed).

[0045] In the description of this specification, the description with reference to terms such as "example", "embodiment" or "some embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0046] Of course, the present invention is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A shock absorption device, characterized in that, Comprising a frame body, inside which a mass ball is provided; a swing arm mechanism, the bottom end of which is connected to the mass ball; a shock absorption component, one end of which is connected to the mass ball and the other end is connected to the frame body, the shock absorption component includes a spring tube, and magnetorheological fluid is provided inside the spring tube; an elastic limiting member, one end of which is connected to the frame body and the other end is connected to the mass ball.

2. The shock absorber according to claim 1, characterized in that, The elastic limiting member includes an elastic pull rope, and the elastic pull rope is arranged to coincide with the shock absorption component.

3. The shock absorption device according to claim 2, characterized in that, The distance between the mass ball and the frame body is greater than the elastic limit length of the elastic pull rope.

4. The shock-absorbing device according to claim 1, wherein A plurality of the shock absorption components are provided, and the plurality of shock absorption components are arranged to diverge along the outer periphery of the mass ball.

5. The shock absorber according to claim 4, characterized in that, The frame body is a cuboid, and the end of the shock absorption component is connected to the vertex of the frame body.

6. The shock absorption device according to claim 1, characterized in that, Comprising a connecting component, which is connected to the top end of the swing arm mechanism.

7. The shock absorber according to claim 6, characterized in that, The swing arm mechanism includes a first connecting rod, a second connecting rod and a lifting adjustment component. The top end of the first connecting rod is connected to the connecting component, the bottom end of the first connecting rod is connected to the lifting adjustment component, the top end of the second connecting rod is connected to the lifting adjustment component, and the bottom end of the second connecting rod is connected to the mass ball.

8. The shock-absorbing device according to claim 7, wherein The lifting adjustment component includes a first connecting member connected to the bottom end of the first connecting rod and a second connecting member connected to the top end of the second connecting rod. A screw rod is provided on the first connecting member, and the second connecting member includes a nut that cooperates with the screw rod.

9. The shock absorption device according to claim 7, characterized in that, A first connecting ring is provided at the bottom of the connecting component, and a second connecting ring is provided at the top of the first connecting rod. The first connecting ring and the second connecting ring are buckled and connected.

10. The shock absorption device according to claim 1, characterized in that, The spring tube is made of a metal material, and a live wire is connected to the spring tube.

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