Multi-energy-consumption vibration isolation support

Abstract

The multi-energy-consumption vibration isolation support comprises a support shell of a double-layer hollow structure, a first energy consumption mechanism is arranged in the double-layer hollow structure, and a second energy consumption mechanism which can be in sliding friction with the inner wall of the support shell up and down is arranged in the support shell; the second energy dissipation mechanism comprises a first container matched with the internal structure of the support shell, the outer wall of the first container is in sliding friction with the inner wall of the support shell, and the inner wall of the first container is connected with an energy conversion assembly through an elastic assembly. And the screw rod sequentially penetrates through the centers of the energy conversion assembly, the first container, the first energy dissipation mechanism and the support shell from top to bottom and can move up and down, the top end of the screw rod is connected with an upper bearing table, and the bottom end of the screw rod is elastically hinged to a lower bearing table. Based on the principle that a nonlinear energy trap and an inerter system are combined, the vibration isolation support can effectively consume energy generated by vibration, and the excellent vibration reduction performance is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of damping energy dissipation and vibration reduction, and particularly relates to a vibration isolation bearing with multiple energy dissipation functions. Background Art

[0002] With the development of society, as an important vibration reduction device, dampers are widely used in building engineering projects such as high-rise buildings, bridges, and large-span structures, or in parts engineering such as automobile manufacturing and machinery production. Dampers mainly reduce the vibration response of structures by consuming the energy during the vibration process of the structures, protecting the safety of building structures under the action of natural forces such as earthquakes and wind loads, and ensuring the comfort and durability of automobiles or mechanical equipment during use.

[0003] In today's era, with the increase in the height of building structures and the complexity of various mechanical equipment, the problems of structural dynamics have gradually become prominent. The current energy dissipation methods of viscous dampers and metal dampers are single, and their effects are not good in the face of high-frequency vibrations and transient impacts. Traditional passive damping measures such as increasing the structural mass and stiffness also cannot meet the requirements of safety and comfort. Therefore, in important building projects and precision mechanical equipment, the demand for new dampers with strong adaptability and good effects is increasing continuously.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and propose a vibration isolation bearing with multiple energy dissipation functions, which combines a non-linear energy sink system and an inertance system, and has the characteristics of light weight, strong robustness, wide vibration reduction frequency band, and adjustable structural vibration characteristics.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The present invention provides a vibration isolation bearing with multiple energy dissipation functions, including a bearing housing with a double-layer hollow structure. A first energy dissipation mechanism is arranged inside the double-layer hollow structure, and a second energy dissipation mechanism that can slide and rub up and down with the inner wall of the bearing housing is arranged in the bearing housing;

[0008] The second energy dissipation mechanism includes a first container that matches the internal structure of the bearing housing. The outer wall of the first container slides and rubs against the inner wall of the bearing housing. An energy conversion component is connected to the inner wall of the first container through an elastic component. The second energy dissipation mechanism also includes a screw rod, which sequentially penetrates through the energy conversion component, the first container, the first energy dissipation mechanism, and the center of the bearing housing from top to bottom and can move up and down. The top end of the screw rod is connected to an upper bearing platform, and the bottom end is elastically hinged to a lower bearing platform.

[0009] Further, the first energy-consuming mechanism includes a first rotating member sleeved on the screw rod. When the screw rod moves up and down, the first rotating member performs a rotational motion.

[0010] It further includes a viscous liquid. Both the first rotating member and the viscous liquid are located inside the double-layer hollow structure, and the first rotating member is immersed in the viscous liquid.

[0011] Further, the outer ring of the first rotating member is a gear structure.

[0012] Further, a closed hollow cavity is provided in the circumferential direction of the first container, and an electrorheological fluid is pre-filled in the hollow cavity.

[0013] Further, friction materials are provided on the outer wall of the first container and the inner wall of the support housing, and the two are in contact through the friction materials and move relative to each other to consume energy.

[0014] Further, the energy conversion assembly includes a second container and a plurality of second rotating members. The plurality of second rotating members are sleeved on the screw rod at intervals. When the screw rod moves up and down, the plurality of second rotating members all perform rotational motions.

[0015] A conductive thin film is provided between the bottom of each second rotating member and the inner wall of the second container, and a plurality of mass balls are provided on each layer of the conductive thin film.

[0016] The outer wall of the second container is connected to the inner wall of the first container through an elastic component.

[0017] Further, the second rotating member includes a rotating base. A plurality of blades are uniformly provided on the outer circumference of the rotating base. The rotating base is sleeved on the screw rod. When the screw rod moves up and down, the rotating base performs a rotational motion, and thus the blades rotate to strike the mass balls of the corresponding layer.

[0018] Further, the angle a between each blade and the screw rod is 75 to 85 degrees.

[0019] Further, the elastic component includes a plurality of first springs provided at intervals both axially and circumferentially along the second container. The outer wall of the second container is connected to the inner wall of the first container through a plurality of first springs.

[0020] Further, one end of a second spring is connected to the top end of the lower bearing platform, the other end of the second spring is connected to the hinge support, and the bottom end of the screw rod is hinged to the hinge support.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) A vibration isolation bearing with multiple energy dissipation proposed by the present invention is based on the principle of the combination of a non-linear energy sink and an inertial mass system. By forming an inertial mass system with an upper bearing platform, a lower bearing platform, a screw, a first rotating member, a viscous liquid, a hinge support, and a second spring according to a specific combination relationship, the vibration damping ability of the system is enhanced; by forming a non-linear energy sink with a conductive film, a conductive film, an elastic component, and a second container filled with an electrorheological liquid according to a specific combination relationship, the capture and conversion of energy are realized by means of the excitation of vibration energy. The non-linear energy sink system and the inertial mass system are closely connected through an intermediate friction material, and have excellent vibration damping ability in the fields of precision instruments and buildings. The vibration isolation bearing of the present invention can effectively dissipate the energy generated by vibration and has excellent vibration damping performance.

[0023] 2) A vibration isolation bearing with multiple energy dissipation proposed by the present invention. The piezoelectric ceramic mass ball acts as both a lighter additional mass and provides a stronger non-linear stiffness in the non-linear energy sink, making the non-linear energy sink more characteristic.

[0024] 3) A vibration isolation bearing with multiple energy dissipation proposed by the present invention has multiple energy dissipation methods and strong vibration absorption ability, solving the problems of single energy dissipation method and poor energy dissipation effect of general dampers, and having broad application and development prospects in multiple fields such as the construction field, the automotive industry, mechanical equipment, and precision instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principle of the present invention.

[0026] 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 accompanying drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the vibration isolation bearing with multiple energy dissipation of the present invention.

[0028] Wherein: 1 is a bearing housing; 2 is a second energy dissipation mechanism; 3 is an upper bearing platform; 4 is a lower bearing platform; 5 is a hinge support; 6 is a second spring; 11 is a first energy dissipation mechanism; 21 is a first container; 22 is an elastic component; 23 is an energy conversion component; 24 is a screw; 111 is a first rotating member; 112 is a viscous liquid; 211 is an electrorheological liquid; 221 is a first spring; 231 is a second container; 232 is a second rotating member; 233 is a conductive film; 234 is a mass ball. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Exemplary embodiments will be described in detail herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples consistent with some aspects of the present invention as detailed in the appended claims.

[0030] Please refer to Figure 1 , an embodiment of the present invention provides a vibration isolation support with multiple energy dissipation, including a support housing 1 with a double-layer hollow structure. A first energy dissipation mechanism 11 is arranged inside the double-layer hollow structure, and a second energy dissipation mechanism 2 that can slide and rub against the inner wall of the support housing 1 is arranged in the support housing 1.

[0031] The second energy dissipation mechanism 2 includes a first container 21 that matches the internal structure of the support housing 1. The outer wall of the first container 21 slides and rubs against the inner wall of the support housing 1. An energy conversion component 23 is connected to the inner wall of the first container 21 through an elastic component 22. It also includes a screw rod 24 that sequentially penetrates through the center of the energy conversion component 23, the first container 21, the first energy dissipation mechanism 11, and the support housing 1 from top to bottom and can move up and down. The top end of the screw rod 24 is connected to an upper bearing platform 3, and the bottom end is elastically hinged to a lower bearing platform 4.

[0032] Further, the first energy dissipation mechanism 11 includes a first rotating member 111 sleeved on the screw rod 24. When the screw rod 24 moves up and down, the first rotating member 111 performs a rotational motion.

[0033] It also includes a viscous liquid 112. Both the first rotating member 111 and the viscous liquid 112 are located inside the double-layer hollow structure, and the first rotating member 111 is immersed in the viscous liquid 112.

[0034] In this embodiment, the outer ring of the first rotating member 111 is a gear structure, and the inner ring is a transmission structure that matches the structure of the screw rod 24, finally realizing the same transmission mode as a ball screw.

[0035] Further, a closed hollow cavity is arranged in the circumferential direction of the first container 21, and an electrorheological fluid 211 is pre-filled in the hollow cavity. Specifically, the first container 21 is made of a metal conductive material, and copper material is selected in this embodiment.

[0036] Further, friction materials are arranged on both the outer wall of the first container 21 and the inner wall of the support housing 1, and the two contact and move relative to each other through the friction materials to dissipate energy. Specifically, the friction material is a rubber-based friction material.

[0037] Further, the energy conversion component 23 includes a second container 231 and a plurality of second rotating members 232. The plurality of second rotating members 232 are spaced and sleeved on the screw rod 24. When the screw rod 24 moves up and down, the plurality of second rotating members 232 all perform rotational motions.

[0038] A conductive film 233 is provided between the bottom of each second rotating member 232 and the inner wall of the second container 231, and a plurality of mass balls 234 are provided on each layer of the conductive film 233; specifically, in this embodiment, the conductive film is a conductive PET film; the mass balls 234 are piezoelectric ceramic mass balls; the mass balls 234 serve as the mass part and generate strong non-linear rigidity.

[0039] The outer wall of the second container 231 is connected to the inner wall of the first container 21 through an elastic component 22.

[0040] Among them, the second rotating member 232 includes a rotating base, on the outer periphery of which there are two pairs of symmetric blades, and the angle a between each blade and the screw 24 is 80 degrees. A conductive film 233 is provided between the bottom of the rotating base and the inner wall of the second container 231. The rotating base is sleeved on the screw 24. When the screw 24 moves up and down, the rotating base performs a rotational motion, thereby causing the blades to rotate and strike the corresponding layer of mass balls 234. Specifically, the transmission between the screw 24 and the rotating base is the same as that of a ball screw.

[0041] It should be noted that the structures of the plurality of second rotating members 232 are the same.

[0042] Furthermore, the elastic component 22 includes a plurality of first springs 221 spaced at intervals both axially and circumferentially along the second container 231. Specifically, there are 3 groups spaced axially, and each group includes 2 symmetric first springs 221 (asymmetry is also possible as long as it can conduct electricity, support the second container 231, and provide slight shock absorption in the horizontal direction). The outer wall of the second container 231 is connected to the inner wall of the first container 21 through a plurality of first springs 221.

[0043] Preferably, the angle between the first spring 221 and the inner wall of the first container 21 is greater than 0 degrees, and the best is 80 - 100 degrees.

[0044] Furthermore, one end of a second spring 6 is connected to the top end of the bearing platform 4, and the other end of the second spring 6 is connected to the hinge support 5. The bottom end of the screw 24 is hinged to the hinge support 5.

[0045] It should be noted that in this embodiment, both the first spring 221 and the second spring 6 are made of metal conductive materials.

[0046] The working principle of the vibration isolation bearing of the present invention is based on the interaction between the non-linear energy sink and the inertial capacitance system. During vertical vibration, the screw 24 starts to move downward or upward under the action of external vibration, and then drives the blades to rotate. The collision force generated by the rotation of the blades strikes the mass ball 234, causing a large amount of energy to be generated during the impact. This impact process not only intensifies the energy conversion but also stimulates the generation of current in the piezoelectric ceramic mass ball 234, forming an electric current. At the same time, the conductive film 233 is indented under the gravity of the mass ball 234, and the mass ball 234 can be concentrated around the screw 24, further making it easier for the blades to strike the mass ball during rotation. Then, the current generated by the mass ball 234 is guided to the first spring 221 through the conductive film 233, and then to the electrorheological fluid 211. The electrorheological fluid 211 can quickly respond to the change of the current signal and generate an efficient energy dissipation effect, thereby effectively consuming the vibration energy.

[0047] Meanwhile, during the up and down movement of the screw 24, the first rotating member 111 rotates, further driving the flow of the viscous fluid 112. Since the viscous fluid 112 has good energy absorption characteristics, when the first rotating member 111 drives the viscous fluid 112 to flow, the viscous fluid 112 produces a strong damping effect on the vibration energy; in addition, during vibration or after being subjected to horizontal vibration, the electrorheological fluid 211 and the viscous fluid 112 are squeezed, and energy is dissipated through friction with the friction material, achieving the effect of multiple energy dissipation of the inertial capacitance system.

[0048] It should be noted that the design of the first rotating member 111 not only plays a role in amplifying the rotational torque but also ensures that the viscous fluid 112 can exert its maximum efficiency.

[0049] The non-linear energy sink and the inertial capacitance system can work together during operation, and the energy generated by vibration is fully absorbed and converted, effectively avoiding the propagation and amplification of vibration, thereby achieving a good vibration reduction effect. The vibration isolation bearing of the present invention fully considers the multi-dimensional characteristics of vibration in its structural design. The connection between the upper and lower bearing platforms and the screw 24 ensures the stability and flexibility of the vibration isolation bearing. The setting of the hinge bearing 5 ensures that the vibration isolation bearing can rotate smoothly when moving in the vertical direction. The design of the spring enables the vibration isolation bearing to reset by stretching or compressing after being stressed, ensuring the self-resetting ability of the vibration isolation bearing.

[0050] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0051] It should be understood that the present invention is not limited to the above-described content and can be variously modified and changed without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A multiple energy dissipation vibration isolation support, characterized in that: A support shell (1) comprising a double-layer hollow structure, wherein a first energy dissipation mechanism (11) is arranged inside the double-layer hollow structure, and a second energy dissipation mechanism (2) is arranged in the support shell (1) and can slide and rub against the inner wall thereof up and down; The second energy dissipation mechanism (2) comprises a first container (21) matching the internal structure of the support shell (1); the outer wall of the first container (21) is in sliding friction with the inner wall of the support shell (1); the inner wall of the first container (21) is connected to an energy conversion component (23) via an elastic component (22); and further comprises a screw rod (24); the screw rod (24) passes through the center of the energy conversion component (23), the first container (21), the first energy dissipation mechanism (11) and the support shell (1) in sequence from top to bottom, and is capable of moving up and down; the top end of the screw rod (24) is connected to an upper bearing platform (3), and the bottom end is elastically hinged to a lower bearing platform (4).

2. The multiple energy dissipation vibration isolation support according to claim 1, characterized in that: The first energy dissipation mechanism (11) comprises a first rotating member (111) sleeved on the screw rod (24), and the first rotating member (111) performs a rotational motion when the screw rod (24) moves up and down; It also includes a viscous liquid (112), wherein the first rotating member (111) and the viscous liquid (112) are both located inside the double-layer hollow structure, and the first rotating member (111) is immersed in the viscous liquid (112).

3. The multiple energy dissipation vibration isolation support according to claim 2, characterized in that: The outer ring of the first rotating member (111) is a gear structure.

4. The multiple energy dissipation vibration isolation support according to claim 1, characterized in that: A closed hollow cavity is provided on the circumference of the first container (21), and the hollow cavity is pre-filled with electrorheological fluid (211).

5. The multiple energy dissipation vibration isolation support according to claim 1, characterized in that: The outer wall of the first container (21) and the inner wall of the support shell (1) are both provided with friction materials, and the two consume energy by contacting and moving relative to each other through the friction materials.

6. The multiple energy dissipation vibration isolation support according to claim 1, characterized in that: The energy conversion component (23) comprises a second container (231) and a plurality of second rotating members (232), wherein the plurality of second rotating members (232) are sleeved on the screw rod (24) at intervals, and when the screw rod (24) moves up and down, the plurality of second rotating members (232) all perform rotational motion; A conductive film (233) is disposed between the bottom of each second rotating member (232) and the inner wall of the second container (231), and a plurality of mass balls (234) are disposed on each layer of the conductive film (233); The outer wall of the second container (231) is connected to the inner wall of the first container (21) via an elastic component (22).

7. The multiple energy dissipation vibration isolation support according to claim 6, characterized in that: The second rotating member (232) comprises a rotating base, a plurality of blades are evenly arranged on the outer circumference of the rotating base, and the rotating base is sleeved on the screw rod (24). When the screw rod (24) moves up and down, the rotating base performs a rotational motion, thereby causing the blades to rotate and hit the mass balls (234) of the corresponding layer.

8. The multiple energy dissipation vibration isolation support according to claim 7, characterized in that: The included angle a between each blade and the screw (24) is 75 to 85 degrees.

9. The multiple energy dissipation vibration isolation support according to claim 6, characterized in that: The elastic component (22) comprises a plurality of first springs (221) spaced apart in the axial direction and the circumferential direction of the second container (231); the outer wall of the second container (231) is connected to the inner wall of the first container (21) via the plurality of first springs (221).

10. The multiple energy dissipation vibration isolation support according to claim 1, characterized in that: The top end of the lower bearing platform (4) is connected to one end of a second spring (6), the other end of the second spring (6) is connected to a hinge support (5), and the bottom end of the screw rod (24) is hinged to the hinge support (5).

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