Multi-effect energy dissipation shock absorber

Abstract

The invention provides a multi-effect energy dissipation shock absorber which comprises a cylindrical steel cylinder, an upper stress rod and a lower stress rod, and the upper stress rod and the lower stress rod are oppositely arranged and each comprise a rod part penetrating through the cylindrical steel cylinder and a connecting plate arranged in the steel cylinder and fixedly connected with the rod part; first viscoelastic damping blocks are arranged at the upper end and the lower end in the cylindrical steel cylinder, and a second viscoelastic damping block and a third viscoelastic damping block are arranged on the upper side and the lower side of a connecting plate of any upper stress rod or lower stress rod correspondingly. The first viscoelastic damping blocks and the second viscoelastic damping blocks are arranged at intervals, and the third viscoelastic damping blocks of the upper stress rod and the lower stress rod are arranged at intervals. And the cylindrical steel cylinder is filled with viscous fluid. The traditional single energy consumption limitation can be improved, and the multi-effect vibration reduction effect is achieved. The energy consumption advantages of viscoelastic damping and viscous damping are combined and played, viscous fluid energy consumption, viscoelastic extrusion energy consumption, friction energy consumption and the like are achieved through mechanism design, energy consumption mechanisms are diversified, and the vibration reduction effect can be improved easily.

Description

Technical Field

[0001] The present invention relates to a structural vibration control device, and more particularly to a multi-effect energy-dissipating shock absorber. Background Art

[0002] The energy-dissipating vibration reduction technology converts the structural vibration energy into heat energy or mechanical energy through an additional damping device, thereby reducing the dynamic response. Its core principle is to utilize the energy-dissipating mechanism of damping materials to effectively absorb the vibration energy caused by external excitations such as earthquakes and wind loads. This technology is widely used in engineering fields such as buildings, bridges, and nuclear power plants, which can significantly improve the seismic and wind resistance performance of structures, ensuring the safety and service life of facilities; at the same time, in the fields of vibration isolation of precision instruments and vibration reduction of industrial equipment, mechanical fatigue damage can be avoided by suppressing harmful vibrations. Its advantages lie in the fact that no external energy input is required, and it has the characteristics of high reliability, strong economy, and convenient maintenance. Commonly used damping materials include viscous damping, viscoelastic damping, etc.; the former is mostly a fluid, and matching design is required to prevent leakage, otherwise the damping mechanism will be greatly reduced; the latter is mostly set as a solid damping layer, but mostly has a single shear energy-dissipating mechanism, and the shear surface is easily torn under large displacement or long-term displacement deformation, resulting in the failure of the mechanism. Therefore, based on the above technical problems, the present invention combines and gives full play to the energy-dissipating advantages of viscoelastic damping and viscous damping through mechanism design, improves the traditional single energy-dissipating limitation, realizes multi-effect vibration reduction, and has high performance stability. Summary of the Invention

[0003] Object of the Invention: The object of the present invention is to provide a multi-effect energy-dissipating shock absorber in view of the deficiencies of the prior art. By means of mechanism design, the viscoelastic damping and viscous damping are organically combined to construct a multi-effect energy-dissipating mechanism, giving full play to their respective advantages to achieve efficient and stable energy dissipation and vibration reduction.

[0004] Technical Solution: The present invention provides a multi-effect energy-dissipating shock absorber, which includes a cylindrical steel cylinder, an upper force-bearing rod and a lower force-bearing rod respectively penetrating through the upper and lower ends of the cylindrical steel cylinder. The upper force-bearing rod and the lower force-bearing rod are oppositely arranged, and each includes a rod portion penetrating through the cylindrical steel cylinder and a connecting plate arranged in the steel cylinder and fixedly connected to the rod portion; First viscoelastic damping blocks are arranged at the upper and lower ends inside the cylindrical steel cylinder, and second viscoelastic damping blocks and third viscoelastic damping blocks are respectively arranged on the upper and lower sides of the connecting plate of any upper force-bearing rod or lower force-bearing rod; The first viscoelastic damping blocks are arranged at intervals, and the third viscoelastic damping blocks of the upper force-bearing rod and the lower force-bearing rod are arranged at intervals; The cylindrical steel cylinder is filled with viscous fluid.

[0005] Wherein, a sealing ring is arranged at the connection between any rod portion and the cylindrical steel cylinder, and a protective / anti-leakage coating is sprayed on the outer side of the cylindrical steel cylinder.

[0006] Among them, the longitudinal sections of the upper stress rod and the lower stress rod are T-shaped, and the upper stress rod and the lower stress rod are symmetrically arranged.

[0007] Among them, the connection surfaces of the first viscoelastic damping block with the cylindrical steel cylinder, the second viscoelastic damping block and the third viscoelastic damping block with the connecting plate are fixedly bonded into one body by vulcanization, and through holes are provided inside the first viscoelastic damping block, the second viscoelastic damping block and the third viscoelastic damping block.

[0008] Among them, the sides of the first viscoelastic damping block away from the cylindrical steel cylinder and the sides of the second viscoelastic damping block and the third viscoelastic damping block away from the connecting plate are both set as curved surfaces. The thicknesses of the first viscoelastic damping block and the third viscoelastic damping block are greater than the thickness of the second viscoelastic damping block. The curved surfaces of the first viscoelastic damping block and the second viscoelastic damping block are mutually fitted and matched, and the curved surfaces of the third viscoelastic damping blocks on both sides are mutually fitted and matched.

[0009] Among them, the distance between the first viscoelastic damping block and the second viscoelastic damping block and the distance between the third viscoelastic damping blocks on both sides are determined according to the required movement stroke, and the distance between the third viscoelastic damping blocks on both sides is greater than the distance between the first viscoelastic damping block and the second viscoelastic damping block.

[0010] Among them, the viscous fluid is filled in the cavities inside the cylindrical steel cylinder and the through holes provided on the first viscoelastic damping block, the second viscoelastic damping block and the third viscoelastic damping block, and a compression cavity is provided between the upper side inside the cylindrical steel cylinder and the liquid level of the viscous fluid, so that the viscous fluid flows in the cavities and the holes during the working process.

[0011] Beneficial effects: Compared with the prior art, the beneficial effects of the technical solution of the present invention are specifically reflected in the following aspects: (1) The present invention can improve the limitation of traditional single energy dissipation and achieve multi-effect vibration damping. The present invention combines and gives play to the energy dissipation advantages of viscoelastic damping and viscous damping, and through mechanism design, realizes viscous fluid energy dissipation, viscoelastic extrusion energy dissipation, friction energy dissipation, etc. (see the working principle for details). The energy dissipation mechanism is diverse, which helps to improve the vibration damping effect.

[0012] (2) While achieving multi-effect vibration damping, the present invention has good energy dissipation robustness. The mechanism design of the present invention effectively avoids the problem that the viscoelastic shear energy dissipation mechanism is prone to failure under large displacement or long-term displacement deformation, and has excellent robustness; at the same time, the multi-effect energy dissipation mechanism can also improve the performance stability, so that when one energy dissipation mechanism fails under extreme working conditions, the performance will not be greatly reduced.

[0013] (3) The present invention can increase the working stroke without increasing the size of the device, which is mainly achieved through the design of the curved surface form of the viscoelastic damping block.

[0014] (4) The mechanism design of the present invention is clear and easy to implement, and has a wide range of application scenarios. It can not only be used alone as an energy dissipation and vibration damping device, but also can be used as an energy-consuming unit of a vibration isolator, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0016] Figure 1 It is a sectional view of the device of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 thus should not be construed as a limitation to the present invention.

[0019] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0020] Such as Figure 1As shown, a multi-effect energy-absorbing shock absorber comprises a cylindrical steel cylinder 1 and an upper force-bearing rod 2 and a lower force-bearing rod 3 respectively penetrating the upper and lower ends of the cylindrical steel cylinder 1. The upper force-bearing rod 2 and the lower force-bearing rod 3 are arranged opposite to each other, and each comprises a rod portion 4 penetrating the cylindrical steel cylinder 1 and a connecting plate 5 arranged in the steel cylinder and fixedly connected to the rod portion 4; The first viscoelastic vibration damping blocks 6 are arranged at the upper and lower ends of the cylindrical steel tube 1, and the second viscoelastic vibration damping blocks 7 and the third viscoelastic vibration damping blocks 8 are arranged at the upper and lower sides of the connecting plate 5 of any upper force-bearing rod 2 or lower force-bearing rod 3; The first viscoelastic vibration damping block 6 and the second viscoelastic vibration damping block 7 are arranged at intervals, and the third viscoelastic vibration damping blocks 8 of the upper force-bearing rod 2 and the lower force-bearing rod 3 are arranged at intervals; The cylindrical steel cylinder 1 is filled with a viscous fluid 9 .

[0021] As an embodiment of the present application, a groove is provided at the interface between the inner upper side surface of the cylindrical steel tube and the first viscoelastic damping block to ensure an effective vulcanization connection of the first viscoelastic damping block.

[0022] As another embodiment of the present application, in order to ensure the effective connection between the first viscoelastic damping block and the inner upper side surface of the cylindrical steel tube, embedded parts may be added to the inner upper side surface of the cylindrical steel tube to enhance the connection strength.

[0023] A sealing ring 10 is provided at the connection between any of the rod portions 4 and the cylindrical steel tube 1 , and a protective / leak-proof coating 11 is sprayed on the outer side of the cylindrical steel tube 1 .

[0024] In order to reduce the leakage rate of viscous fluid, a double leak-proof design is adopted by setting a sealing ring and spraying a protective / leak-proof coating on the outer side of the cylindrical steel cylinder as a whole. This can reduce leakage as much as possible during the operation of the device and ensure the continuity and effectiveness of the multi-effect vibration reduction. The main leak-proof effect is provided by the sealing ring, and the auxiliary leak-proof effect is provided by the protective / leak-proof coating sprayed on the outside of the cylindrical steel cylinder. A gap is left between the spraying of the protective / leak-proof coating and the rod to allow the rod to move up and down, so that the rod can move up and down when subjected to force.

[0025] The longitudinal sections of the upper stress-bearing rod 2 and the lower stress-bearing rod 3 are T-shaped, and the upper stress-bearing rod 2 and the lower stress-bearing rod 3 are symmetrically arranged.

[0026] The symmetrically arranged upper force-bearing rod and the lower force-bearing rod make the distance between the first viscoelastic vibration damping block and the second viscoelastic vibration damping block on both sides the same. During operation, the damping materials on both sides provide a more balanced vibration damping effect, avoiding the possibility of reduced vibration damping effect or even failure due to smaller spacing on either side and higher working intensity.

[0027] The connection surface between the first viscoelastic damping block 6 and the cylindrical steel cylinder 1, and the connection surfaces between the second viscoelastic damping block 7 and the third viscoelastic damping block 8 and the connecting plate 5 are integrally fixed and bonded by vulcanization. Through holes 12 are provided inside the first viscoelastic damping block 6, the second viscoelastic damping block 7, and the third viscoelastic damping block 8.

[0028] It should be noted that the hole design is not unique. The number and aperture size can obtain a better layout and aperture through an optimization algorithm. The main purpose is that the viscous fluid can flow into the holes, and under the action of vibration, a damping force is generated through the extrusion effect.

[0029] The sides of the first viscoelastic damping block 6 away from the cylindrical steel cylinder 1, and the sides of the second viscoelastic damping block 7 and the third viscoelastic damping block 8 away from the connecting plate 5 are all set as curved surfaces. The thicknesses of the first viscoelastic damping block 6 and the third viscoelastic damping block 8 are greater than the thickness of the second viscoelastic damping block 7. The curved surfaces of the first viscoelastic damping block 6 and the second viscoelastic damping block 7 are mutually fitted and matched, and the curved surfaces of the two third viscoelastic damping blocks 8 on both sides are mutually fitted and matched.

[0030] In order to further improve the damping effect, according to the movement trajectories and amplitudes of the upper and lower force-bearing rods in the vibration state, viscoelastic damping blocks with different thicknesses are set, and at the same time, to avoid damage to the device caused by hard contact between the rigid connecting plate and the cylindrical steel cylinder and between the two connecting plates on both sides. Under the action of vibration (when the amplitude is large), the upper and lower curved surfaces are fitted together and the energy dissipation mechanism is transformed.

[0031] The distance between the first viscoelastic damping block 6 and the second viscoelastic damping block 7 and the distance between the two third viscoelastic damping blocks 8 on both sides are determined according to the required movement stroke. Among them, the distance between the two third viscoelastic damping blocks 8 on both sides is greater than the distance between the first viscoelastic damping block 6 and the second viscoelastic damping block 7.

[0032] As an embodiment of the present application, the upper side of the upper and lower sides of the connecting plate is the side of the connecting plate close to the rod part, and the lower side is the side of the connecting plate away from the rod part. In the initial state, there are gaps between the first viscoelastic damping block and the second viscoelastic damping block and the two third viscoelastic damping blocks on both sides. The gap distance is determined according to the movement stroke. The movement stroke is restricted according to different application scenarios, and the vibration amplitudes are different in different scenarios. The viscous fluid 9 is filled in the cavity inside the cylindrical steel cylinder 1 and the through holes 12 provided on the first viscoelastic damping block 6, the second viscoelastic damping block 7, and the third viscoelastic damping block 8. And a compression cavity 13 is provided between the upper side inside the cylindrical steel cylinder 1 and the liquid level of the viscous fluid 9. During the working process, the viscous fluid 9 flows in the cavity and the holes 12.

[0033] As an embodiment of the present application, the viscous fluid is set as high-grade silicone oil or viscous polyurethane fluid, or other fluid materials with damping effects. The inner cavity is not filled completely, and a compression cavity is reserved to enable the viscous fluid to flow through the inner cavity of the cylindrical steel barrel and the through holes inside each viscoelastic damping block.

[0034] The working principle of the device in this embodiment includes the following aspects: The first stage: When the external vibration excitation is small and the motion amplitude is also relatively small, the upper force-bearing rod and the lower force-bearing rod move up and down, but the viscoelastic damping blocks do not contact each other. At this time, the viscous fluid is driven by the upper force-bearing rod and the lower force-bearing rod for energy consumption; meanwhile, the viscous fluid flowing through the through holes in each viscoelastic damping block also provides additional damping force.

[0035] The second stage: As the external vibration excitation gradually increases and the motion amplitude also increases accordingly, the upper force-bearing rod and the lower force-bearing rod move up and down. The first viscoelastic damping block will come into contact with the second viscoelastic damping block and the third viscoelastic damping blocks on both sides, and their respective curved surfaces will be mutually engaged with a small compression distance; this means that the viscoelastic damping blocks collide and squeeze with each other, and at this time, additional stiffness and compression energy consumption will be provided, which can effectively control the excessive increase of displacement and increase the compression energy consumption on the basis of the energy consumption of the viscous fluid in the first stage, effectively improving the control effect.

[0036] The third stage: When the external vibration excitation is large and the motion amplitude is close to the maximum working stroke, the upper force-bearing rod and the lower force-bearing rod move up and down. The first viscoelastic damping block will come into contact with the second viscoelastic damping block and the third viscoelastic damping blocks on both sides, and there is a large compression distance. At this time, the viscoelastic damping blocks collide and squeeze with each other, and the previous working state is the same as that in the second stage. During the reciprocating vibration process, due to the angle between the contact curved surfaces of the first viscoelastic damping block, the second viscoelastic damping block, and the third viscoelastic damping blocks on both sides, friction will occur for friction damping energy consumption, further enhancing the energy consumption ability. At the same time, the additional stiffness generated by the mutual compression of the viscoelastic damping blocks gradually increases, preventing excessive displacement and avoiding stroke damage caused by sudden stiffness changes; during this process, the viscous fluid flowing through the through holes in each viscoelastic damping block also provides additional damping force.

[0037] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the relevant parts, reference can be made to the description in the method part.

[0038] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-effect energy-dissipating vibration absorber, characterized in that: It comprises a cylindrical steel cylinder (1) and an upper force-bearing rod (2) and a lower force-bearing rod (3) respectively penetrating the upper and lower ends of the cylindrical steel cylinder (1); the upper force-bearing rod (2) and the lower force-bearing rod (3) are arranged opposite to each other and each comprises a rod portion (4) penetrating the cylindrical steel cylinder (1) and a connecting plate (5) arranged in the steel cylinder and fixedly connected to the rod portion (4); The cylindrical steel tube (1) is provided with first viscoelastic vibration-damping blocks (6) at the upper and lower ends thereof, and a second viscoelastic vibration-damping block (7) and a third viscoelastic vibration-damping block (8) are provided at the upper and lower sides of the connecting plate (5) of any upper force-bearing rod (2) or lower force-bearing rod (3), respectively; The first viscoelastic vibration damping block (6) and the second viscoelastic vibration damping block (7) are arranged at intervals, and the third viscoelastic vibration damping blocks (8) of the upper force-bearing rod (2) and the lower force-bearing rod (3) are arranged at intervals; The cylindrical steel cylinder (1) is filled with a viscous fluid (9).

2. The multi-effect energy dissipation vibration absorber according to claim 1 is characterized in that: A sealing ring (10) is provided at the connection between any of the rod parts (4) and the cylindrical steel cylinder (1), and a protective / leak-proof coating (11) is sprayed on the outside of the cylindrical steel cylinder (1).

3. The multi-effect energy dissipation vibration absorber according to claim 1 is characterized in that: The longitudinal sections of the upper force-bearing rod (2) and the lower force-bearing rod (3) are T-shaped, and the upper force-bearing rod (2) and the lower force-bearing rod (3) are symmetrically arranged.

4. The multi-effect energy dissipation vibration absorber according to claim 1 or 3, characterized in that: The connection surface between the first viscoelastic vibration damping block (6) and the cylindrical steel cylinder (1), and the connection surfaces between the second viscoelastic vibration damping block (7) and the third viscoelastic vibration damping block (8) and the connection plate (5) are all bonded together by vulcanization fixation, and the first viscoelastic vibration damping block (6), the second viscoelastic vibration damping block (7) and the third viscoelastic vibration damping block (8) are provided with through holes (12) inside.

5. The multi-effect energy dissipation vibration absorber according to claim 1 is characterized in that: The side of the first viscoelastic vibration damping block (6) away from the cylindrical steel cylinder (1) and the sides of the second viscoelastic vibration damping block (7) and the third viscoelastic vibration damping block (8) away from the connecting plate (5) are all arranged as curved surfaces; the thickness of the first viscoelastic vibration damping block (6) and the third viscoelastic vibration damping block (8) is greater than the thickness of the second viscoelastic vibration damping block (7); the curved surfaces of the first viscoelastic vibration damping block (6) and the second viscoelastic vibration damping block (7) fit in with each other, and the curved surfaces of the third viscoelastic vibration damping block (8) on both sides fit in with each other.

6. The multi-effect energy dissipation vibration absorber according to claim 1 is characterized in that: The distance between the first viscoelastic vibration damping block (6) and the second viscoelastic vibration damping block (7) and the distance between the third viscoelastic vibration damping blocks (8) on both sides are determined according to a required movement stroke, wherein the distance between the third viscoelastic vibration damping blocks (8) on both sides is greater than the distance between the first viscoelastic vibration damping block (6) and the second viscoelastic vibration damping block (7).

7. The multi-effect energy dissipation vibration absorber according to claim 1 is characterized in that: The viscous fluid (9) is filled in the cavity inside the cylindrical steel cylinder (1) and in the through holes (12) provided on the first viscoelastic vibration damping block (6), the second viscoelastic vibration damping block (7) and the third viscoelastic vibration damping block (8), and a compression cavity (13) is provided between the upper side of the interior of the cylindrical steel cylinder (1) and the liquid surface of the viscous fluid (9), so that the viscous fluid (9) flows in the cavity and the holes (12) during operation.

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