Tuned particle dampers

Abstract

The present invention relates to the field of damper technology, and specifically provides a tuned particle damper, comprising: a first mounting portion, a second mounting portion, a spiral mechanism, and a tuned particle rotating portion, wherein the first mounting portion is slidably connected to the second mounting portion; the spiral mechanism is disposed within the second mounting portion and is used to convert linear sliding between the first mounting portion and the second mounting portion into rotational motion and output it; the tuned particle rotating portion is rotatably mounted within the first mounting portion, and the output end of the spiral mechanism is connected to the tuned particle rotating portion to provide rotational force to the tuned particle rotating portion. The present invention effectively solves the problem of the prior art that tuned mass dampers require a large mass ratio, achieving the goal of achieving a good shock absorption effect using a tuned mass damper with a smaller mass ratio.

Description

Technical Field

[0001] The present invention relates to the technical field of dampers, and in particular to a tuned particle damper. Background Art

[0002] Vibration is a widespread problem in the fields of machinery and civil engineering. Excessive vibration can lead to a series of negative problems, such as affecting the accuracy of precision instruments, causing component fatigue, and even the destruction of the entire structure. Therefore, adding vibration control devices to absorb and dissipate vibration energy is very important for ensuring the serviceability and safety of the vibrating subject. Based on the different working mechanisms, existing vibration control technologies can be roughly divided into four categories: passive control, active control, semi-active control, and hybrid control. Among them, passive control technology has attracted widespread attention due to its many advantages such as no need for external energy and real-time data feedback, simple structure, and clear mechanism. Tuned Mass Damper (TMD) is one of them.

[0003] Depending on their structural form, tuned mass dampers can be categorized as linear, rolling, and granular. Tuned granular dampers primarily achieve energy dissipation and vibration reduction by filling a confined, enclosed space with particles. When a vibrating object equipped with a tuned granular damper vibrates, the particles within the damper's enclosed space move in the direction of the vibration, tuning the vibration frequency of the external vibrating object. Simultaneously, through friction and collision between the particles, mechanical energy is converted into heat and dissipated, ultimately achieving the desired vibration reduction effect.

[0004] However, existing tuned mass dampers often require a large mass ratio (i.e., the ratio of the mass of the tuned mass damper to the mass of the vibrating body, which is approximately 2%-5%) to achieve a good vibration reduction effect. For example, a 33-story residential building has a mass of approximately 100,000 tons, and the mass of the tuned mass damper that matches it will reach approximately 2,000 tons. This is a very large weight, requiring a lot of manpower, material resources, and financial resources for manufacturing and installation. Another example is a "rolling-type" tuned mass damper that relies on the movement of a rolling mass block to dissipate the energy of the vibrating body. When a good vibration reduction effect is required, a large mass block is often required to meet the vibration reduction requirements. However, in actual engineering applications, large rolling masses are often not used due to insufficient installation space on the top of the vibrating body structure or insufficient support stiffness of the main structure, resulting in poor vibration reduction effect. Summary of the Invention

[0005] The present invention provides a tuned particle damper to solve the problem in the prior art that a tuned mass damper requires a large mass ratio, thereby achieving the goal of achieving a good vibration reduction effect using a tuned mass damper with a smaller mass ratio.

[0006] The present invention provides a tuned particle damper, comprising:

[0007] a first mounting portion;

[0008] a second mounting portion, slidably connected to the first mounting portion;

[0009] a screw mechanism, disposed in the second mounting portion, for converting the linear sliding motion between the first mounting portion and the second mounting portion into a rotational motion and outputting the rotational motion;

[0010] The tuning particle rotating part is rotatably mounted in the first mounting part. The output end of the spiral mechanism is connected to the tuning particle rotating part to provide rotational force to the tuning particle rotating part.

[0011] According to the tuned particle damper provided by the present invention, the tuned particle rotating part includes:

[0012] A support member for supporting the particle sliding cavity;

[0013] There are multiple particle sliding cavities that are independent of each other. The particle sliding cavities are arranged on the support member, and mass particles are arranged in the particle sliding cavities.

[0014] The tuned particle damper provided by the present invention:

[0015] The particle sliding cavities are evenly distributed with the rotation axis of the support as the center.

[0016] The tuned particle damper provided by the present invention:

[0017] The support member includes: a rotating column;

[0018] The particle sliding cavity includes: an arc-shaped sliding groove opened along the circumference of the rotating column, and there are multiple arc-shaped sliding grooves that are evenly distributed with the rotating axis of the rotating column as the center.

[0019] According to the tuned particle damper provided by the present invention, an arc spring is provided in the arc chute, one end of the arc spring is fixedly connected to the arc chute, and the other end of the arc spring is fixedly connected to the mass particle.

[0020] The tuned particle damper provided by the present invention:

[0021] The interconnected arc springs and the mass particles form a group of elastic mechanisms. An even number of elastic mechanisms greater than or equal to 2 is provided in the arc chute, and the even number of elastic mechanisms is equally divided into two parts, wherein one part of the arc springs is fixed on the side wall of the arc chute, and the other part of the arc springs is fixed on the opposite side wall of the arc chute. The mass particles are arranged facing each other and can move along the circumference of the rotating column, and the mass particles can collide with each other.

[0022] According to the tuned particle damper provided by the present invention, the spiral mechanism includes:

[0023] Ball screw;

[0024] a ball nut, fixedly mounted on the second mounting portion and connected to the ball screw;

[0025] One end of the ball screw is connected to the tuning particle rotating part for providing rotational force to the tuning particle rotating part. The other end of the ball screw is provided with a limiting part for limiting the stroke of the ball nut.

[0026] The tuned particle damper provided by the present invention:

[0027] The first mounting portion includes:

[0028] A housing, wherein a rotating cavity and a sliding cavity are provided in the housing, and the tuning particle rotating portion is rotatably installed in the rotating cavity;

[0029] The second mounting portion includes:

[0030] An inner shell, wherein the outer shell is sleeved in the sliding cavity, and the inner shell is slidably connected to the outer shell;

[0031] The ball nut is fixedly mounted on the inner wall of the inner shell, the ball screw passes through the inner shell and is connected to the tuning particle rotating part, and the axial direction of the ball screw is consistent with the sliding direction of the inner shell.

[0032] According to the tuned particle damper provided by the present invention, the particle sliding cavity is filled with viscous liquid.

[0033] According to the tuned particle damper provided by the present invention, the plurality of arcuate slots on the same radial cross section form an arcuate slot group, and the rotating column is provided with the plurality of arcuate slot groups along the axial direction.

[0034] The tuned particle damper provided by the present invention can well convert the linear sliding of the first mounting part and the second mounting part brought by the vibrating body into the rotational motion of the tuned particle rotating part through the sliding connection between the first mounting part and the second mounting part, the provision of a spiral mechanism in the second mounting part, the rotational installation of the tuned particle rotating part in the first mounting part, and the connection of the rotational output end of the spiral mechanism with the tuned particle rotating part. Since the tuned particle rotating part has rotational inertia and the amplification mechanism of the spiral mechanism, the reaction force generated by the tuned particle rotating part is amplified and converted into the sliding resistance between the first mounting part and the second mounting part, and then acts on the vibrating body, thereby effectively solving the problem in the prior art that the tuned mass damper requires a larger mass ratio, and achieving the purpose of achieving a better shock absorption effect using a tuned mass damper with a smaller mass ratio.

[0035] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 1 is a schematic diagram of the axial cross-sectional structure of the tuned particle damper provided by the present invention;

[0038] Figure 2 This is a schematic diagram of the three-dimensional structure of a lower rotating column according to an embodiment of the present invention;

[0039] Figure 3 1 is a schematic diagram of a radial cross-sectional structure of a tuning particle rotating portion according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of the three-dimensional structure of a lower rotating column according to an embodiment of the present invention;

[0041] Figure 5 yes Figure 4 Schematic diagram of the left view of the central rotating column.

[0042] Reference numerals:

[0043] 1. First mounting portion; 11. Housing; 12. Rotating cavity; 13. Sliding cavity; 14. Bearing; 15. First connecting buckle;

[0044] 2. Second mounting portion; 21. Inner shell; 22. Inner shell cavity; 23. Second connecting buckle;

[0045] 3. Screw mechanism; 31. Ball screw; 32. Ball nut; 33. Limiting part;

[0046] 4. Tuning particle rotating part; 41. Rotating column; 42. Arc chute; 421. Arc spring; 422. Mass particle; 423. Viscous liquid; 424. Partition; 43. Rotating axis. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] In the description of the embodiments of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the embodiments of the present invention and to simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. Furthermore, the terms "first," "second," etc., etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0050] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0051] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0052] The following combination Figure 1 The embodiment shown describes the technical solution of the present invention:

[0053] The present invention provides a tuned particle damper, comprising: a first mounting part 1, a second mounting part 2, a spiral mechanism 3 and a tuned particle rotating part 4, wherein the first mounting part 1 is slidingly connected to the second mounting part 2; the spiral mechanism 3 is arranged in the second mounting part 2, and is used to convert the linear sliding of the first mounting part 1 and the second mounting part 2 into rotational motion and output it; the tuned particle rotating part 4 is rotatably mounted in the first mounting part 1, and the output end of the spiral mechanism 3 is connected to the tuned particle rotating part 4, and is used to provide rotational force to the tuned particle rotating part 4.

[0054] In a specific application, the first mounting portion 1 can be an outer mounting frame or outer shell 11, which is used to support the tuning particle rotating portion 4 and provide the tuning particle rotating portion 4 with a certain rotation space. At the same time, the first mounting portion 1 is also connected to the vibration body through a connecting piece. The second mounting portion 2 can be an inner mounting frame or inner shell 21, which is used to fix the spiral mechanism 3 and connect it to the vibration body. In this embodiment, the first mounting portion 1 and the second mounting portion 2 are preferably an outer shell 11 and an inner shell 21. The outer shell 11 is sleeved on a portion of the inner shell 21, and the two can slide in the horizontal direction. A plurality of guide bars are provided along the axial direction on the inner wall of the outer shell 11, and a plurality of guide grooves are correspondingly provided along the axial direction on the outer wall of the inner shell 21. The cooperation between the guide bars and the guide grooves can constrain the inner shell 21 from rotating relative to the outer shell 11 during the sliding process.

[0055] In this embodiment, the screw mechanism 3 is preferably a ball screw pair formed by a ball screw 31, a ball nut 32 and balls; when the ball nut is fixedly installed with the inner shell 21, the horizontal linear motion of the inner shell 21 and the outer shell 11 can be effectively converted into the rotational motion of the ball screw 31.

[0056] In this embodiment, the tuning particle rotating part 4 is preferably a combination of a light alloy rotating column 41, a particle sliding cavity and a mass particle 422; wherein, a rotating shaft 43 is fixedly provided at the axis of the rotating column 41, and the rotating shaft 43 is rotatably installed in the inner cavity of the outer shell 11 through a bearing 14; and one end of the rotating shaft 43 is fixedly connected to one end of the above-mentioned ball screw 31, and when the ball screw 31 rotates, it will drive the tuning particle rotating part 4 to rotate as a whole; a plurality of particle sliding cavities are opened on the side of the rotating column 41 for accommodating the mass particles 422, and the particle sliding cavity and the arc-shaped inner wall of the outer shell 11 form a closed space; of course, these particle sliding cavities can be evenly distributed or unevenly distributed on the rotating column 41, and in this embodiment, they are preferably evenly distributed.

[0057] The tuned particle damper provided by the present invention can well convert the linear sliding of the first mounting part 1 and the second mounting part 2 brought by the vibrating body into the rotational motion of the tuned particle rotating part 4 through the sliding connection between the first mounting part 1 and the second mounting part 2, the provision of a spiral mechanism 3 in the second mounting part 2, the rotational installation of the tuned particle rotating part 4 in the first mounting part 1, and the connection of the rotational output end of the spiral mechanism 3 with the tuned particle rotating part 4. Since the tuned particle rotating part 4 has rotational inertia and the amplification mechanism of the spiral mechanism 3, the reaction force generated by the tuned particle rotating part 4 is amplified and converted into the sliding resistance between the first mounting part 1 and the second mounting part 2, and then acts on the vibrating body, thereby effectively solving the problem in the prior art that the tuned mass damper requires a larger mass ratio, and achieving the purpose of achieving a better shock absorption effect using a tuned mass damper with a smaller mass ratio.

[0058] According to the tuned particle damper provided by the embodiment of the present invention, Figure 2 and Figure 3 As shown, the tuned particle rotating part 4 includes: a support member and a particle sliding cavity, wherein the support member is used to support the particle sliding cavity; there are multiple particle sliding cavities that are independent of each other, the particle sliding cavity is arranged on the support member, and mass particles 422 are arranged in the particle sliding cavity.

[0059] In specific applications, the support member can be a support frame or a rotating column 41, and a plurality of closed particle sliding cavities can be fixed on the support frame, and mass particles 422 are arranged in the cavities; a plurality of particle sliding cavities can also be opened inside the rotating column 41 or on its surface. When opened inside the rotating column 41, a closed space will naturally be formed, which can be obtained by mold casting, and the mass particles 422 can be pre-set in an independent cavity mold; when opened on the outer surface of the rotating column 41, the particle sliding cavity needs to be formed into a closed space by the opened particle chute and the inner wall of the shell 11, and the mass particles 422 can be placed therein after the particle chute is opened; of course, these particle sliding cavities can be evenly distributed or unevenly distributed on the support member, and in this embodiment, uniform distribution is preferred.

[0060] In this embodiment, a mass particle 422 is disposed within the particle sliding cavity. There are currently two ways to dispose the mass particle 422: First, a mass particle 422 is directly placed within the particle sliding cavity, allowing it to slide and collide within the cavity; second, a spring is fixed to the mass particle 422, which is in turn fixed to the inner wall of the particle sliding cavity, thereby enabling the mass particle 422 to reciprocate in the direction of rotation of the particle sliding cavity. Both of these scenarios are described below:

[0061] First, the mass particles 422 are freely arranged in an independent particle sliding cavity, and the tuning is achieved by the mass particles 422 colliding with the inner wall of the particle sliding cavity. The collision occurs because there is always a certain hysteresis in the movement of the mass particles 422 relative to the particle sliding cavity. Therefore, during the movement, the two will continuously collide, thereby achieving momentum tuning and energy dissipation. When the mass particles 422 collide with the inner wall of the particle sliding cavity, the collision force is converted into the torque of the ball screw 31, and through the self-amplification mechanism of the ball screw 31, it is output as the sliding resistance of the two mounting parts, thereby achieving the purpose of suppressing the vibration of the vibrating body. At the same time, the support member itself also has a certain moment of inertia. Through the amplification mechanism of the ball screw 31, the rotational inertia of the support member can be amplified, further amplifying its inertial force, thereby increasing the sliding resistance of the two mounting parts, and thus effectively improving the control force of the damper on the vibrating body.

[0062] The relationship between the torque generated by the collision force and the sliding resistance it converts into is:

[0063]

[0064] Wherein, F is the sliding resistance value, l is the lead of the ball screw 31, and T is the screw torque.

[0065] Secondly, the mass particle 422 is set in an independent particle sliding cavity through a spring, and its tuning is achieved through the inertia force of the mass particle 422. At this time, the mass particle 422 does not collide with the inner wall of the particle sliding cavity. The mass particle 422 is connected to the support member through the spring, so the ball screw 31 amplifies the overall rotational inertia of the support member and the mass particle 422, and further amplifies its inertia force. The inertia force is equivalent to the sliding resistance of the two mounting parts, thereby effectively improving the control force of the damper on the vibrating body, thereby effectively solving the problem in the prior art that the tuned mass damper requires a larger mass ratio, and achieving the purpose of achieving a better shock absorption effect using a tuned mass damper with a smaller mass ratio.

[0066] The above-mentioned support member will produce a negative stiffness effect while rotating. Compared with the traditional tuned particle damper, it is much more efficient in dissipating the energy of the vibrating body. It can absorb the energy of the vibrating body and dissipate it in time.

[0067] The tuned particle damper provided by the embodiment of the present invention avoids the low energy efficiency problem of traditional particle dampers (especially metal particle dampers) by providing multiple independent particle sliding cavities on the support member. Because traditional particle dampers mostly use a certain stack of particles, that is, multiple particles are stacked and placed in a space, when the particles vibrate, the interaction between the particles greatly limits the multi-directional rolling or sliding of the particles, thereby reducing the friction and collision probability between the particles and lowering the energy efficiency. The multiple independent spaces provided in this embodiment provide sufficient space conditions for the multi-directional vibration of the particles.

[0068] According to the tuned particle damper provided by the embodiment of the present invention, Figures 2 to 5 As shown, the particle sliding cavities are evenly distributed around the rotation axis 43 of the support.

[0069] In a specific application, the particle sliding cavities on the support are evenly distributed with the rotation axis 43 of the support as the center; they can be distributed in equal angles within the same cross section of the support, such as Figure 2 and Figure 3 As shown, in the same cross section of the rotating column 41, there are three independent particle sliding cavities, and the central angle corresponding to each particle sliding cavity is 120°. There are two other groups of particle sliding cavities arranged parallel to the axis of the rotating column 41. Figure 2 A total of 9 independent particle sliding cavities are shown; they can also be distributed in equal angles under the projection of the same plane at different cross sections (such as Figure 5 As shown), that is, they are evenly distributed along the axial direction of the rotating column 41, as shown Figure 4 As shown, three particle sliding cavities are sequentially defined along the axial direction of the rotating column 41. Each of these three particle sliding cavities forms a 120° central angle relative to the rotation axis 43 of the rotating column 41, and the distance between each particle sliding cavity is equal. By evenly distributing the particle sliding cavities around the rotation axis 43 of the support member, rotational balance is ensured.

[0070] According to the tuned particle damper provided by the embodiment of the present invention, Figures 2 to 5 As shown, the support member includes: a rotating column 41; the particle sliding cavity includes: an arc-shaped sliding groove 42 opened along the circumference of the rotating column 41, and there are multiple arc-shaped sliding grooves 42 that are evenly distributed around the rotating axis 43 of the rotating column 41.

[0071] In a specific application, the support is preferably a rotating column 41, which can be cast from non-metallic materials such as rubber, polyethylene, etc., or a light alloy material. A rotating shaft 43 is fixedly provided at the central axis of the rotating column 41; the particle sliding cavity is preferably an arc-shaped slide groove 42 opened along the circumference of the rotating column 41; Figure 2 and Figure 3 As shown, in the same cross section of the rotating column 41, there are three independent particle sliding cavities, and the central angle corresponding to each particle sliding cavity is 120°. There are two other groups of particle sliding cavities arranged parallel to the axis of the rotating column 41. Figure 2 A total of 9 independent particle sliding cavities are shown; they can also be distributed in equal angles under the projection of the same plane at different cross sections (such as Figure 5 As shown), that is, they are evenly distributed along the axial direction of the rotating column 41, as shown Figure 4 As shown, three particle sliding cavities are sequentially defined along the axial direction of the rotating column 41. Each of these three particle sliding cavities forms a 120° central angle relative to the rotation axis 43 of the rotating column 41, and each particle sliding cavity is equidistant from the rotation axis 43. By evenly distributing the particle sliding cavities around the support member's rotation axis 43, balanced rotation is ensured. A mass particle 422 is disposed within the arcuate chute 42, allowing it to slide in an arc.

[0072] According to the tuned particle damper provided by the embodiment of the present invention, Figure 3 As shown, an arc spring 421 is provided in the arc chute 42 , and one end of the arc spring 421 is fixedly connected to the arc chute 42 , and the other end of the arc spring 421 is fixedly connected to the mass particle 422 .

[0073] The above embodiment has introduced the case where no spring is added. In this embodiment, the mass particle 422 is set in an independent arc-shaped slide groove 42 through an arc spring 421. The purpose of setting the arc spring 421 is to make the movement state of the mass particle 422 clearer, thereby achieving a more obvious tuning effect.

[0074] Its tuning is achieved through the inertial force of the mass particle 422. At this time, the mass particle 422 will not collide with the inner wall of the arc-shaped slide groove 42 (i.e., the partition 424) due to the restriction of the arc spring 421. The arc spring 421 has a certain amount of tension and a certain amount of compression. The mass particle 422 is connected to the rotating column 41 through the spring. Therefore, the ball screw 31 amplifies the overall rotational inertia of the rotating column 41 and the mass particle 422, and further amplifies its inertial force. The inertial force is equivalent to the sliding resistance of the two mounting parts, thereby effectively improving the control force of the damper on the vibration body.

[0075] According to the tuned particle damper provided by the embodiment of the present invention, Figure 3 As shown, the interconnected arc springs 421 and mass particles 422 form a group of elastic mechanisms, and an even number of elastic mechanisms greater than or equal to 2 is provided in the arc chute 42, and the even number of elastic mechanisms is equally divided into two parts, wherein the arc springs 421 of one part are fixed on the side wall of the arc chute 42, and the arc springs 421 of the other part are fixed on the opposite side wall of the arc chute 42, and the mass particles 422 are arranged facing each other and can move along the circumference of the rotating column 41, and the mass particles 422 can collide with each other.

[0076] In a specific application, the mass particles 422 are preferably steel ball particles, and the axis of the arc spring 421 is an arc, the curvature of which is equal to the curvature of the bottom surface of the arc chute; one end of the arc spring 421 is fixedly connected to the mass particle 422, and the other end is fixedly connected to the side wall of the partition 424 of the arc chute 42. If the arc chute 42 has sufficient width, the elastic mechanism composed of the arc spring 421 and the mass particle 422 is arranged in multiple groups along the axial direction of the rotating shaft 43, and corresponding multiple groups of elastic mechanisms can also be arranged on the partition 424 on the opposite side; if the width of the arc chute 42 is only enough to set one group of elastic mechanisms, then Figure 2 As shown, three arc-shaped slots 42 on the same radial section form an arc-shaped slot group. Three arc-shaped slot groups are arranged axially on the rotating column 41 to further increase the total mass of the mass particles 422 and thus increase the moment of inertia.

[0077] When the elastic mechanisms are arranged in opposing directions, during vibration, the two ends of the damper, namely the first mounting portion 1 and the second mounting portion 2, will reciprocate horizontally, causing the rotating column 41 to rotate forward and backward in the first mounting portion 1. Because the mass particles 422 are connected to the partition 424 via the arc spring 421, when the rotating column 41 rotates, the mass particles 422 do not immediately slide with the rotating column 41. When the rotating column 41 just starts to rotate in the first mounting part 1, the mass particle 422 in the same arc-shaped slot 42 is stationary relative to the partition 424. Therefore, one of the two arc springs 421 connected to the two ends of the partition 424 will be compressed and the other will be stretched, thereby driving the mass particle 422 to slide in the arc-shaped slot 42; when the rotation direction of the rotating column 41 changes, the mass particle 422 still rotates in the original rotation direction due to inertia, that is, the rotation of the mass particle 422 has a lag relative to the partition 424 in the rotating column 41, thereby compressing or stretching the arc spring 421 connected between the mass particle 422 and the partition 424. The elastic force generated by the arc spring 421 hinders the change in the rotation direction of the rotating column 41, and thus hinders the change in the movement direction of the first mounting part 1 and the second mounting part 2, so as to achieve the purpose of vibration reduction.

[0078] When the damper is subjected to a large dynamic load, when the difference between the tensile stroke of one arc spring 421 and the compression stroke of the corresponding other arc spring 421 in the same arc chute 42 is greater than the distance between the two particles connected by the arc spring 421, the two particles in the same arc chute 42 will collide, thereby exchanging momentum and dissipating the vibration energy of the structure more efficiently.

[0079] Each particle in each arcuate chute 42 can be considered a tuned single particle damper. Therefore, the present invention can also be considered as multiple tuned single particle dampers connected in parallel on the rotating column 41. Therefore, by varying the gradation of different particles (i.e., selecting different particle mass sizes or different spring stiffnesses), a wider vibration damping frequency band can be achieved, effectively addressing vibration issues under multimodal control. Conventional tuned mass dampers have a relatively single tuning frequency, typically targeting only a single vibration mode, and have limited control effectiveness over multimodal vibration patterns.

[0080] It can tune the different vibration frequencies of the vibrating body; the steel ball particles in the same arc groove group can also be set to different masses according to actual needs, and the arc springs 421 with different stiffness coefficients can be set, which can adapt to a wider vibration reduction frequency band and have better adaptability to multi-modal vibration forms.

[0081] When the horizontal movement direction of the first mounting part 1 and the second mounting part 2 changes, the rotation direction of the rotating column 41 in the first mounting part 1 also needs to change. However, due to inertia, the rotating column 41 still rotates in the original rotation direction, and the forward direction of the ball nut 32 has not changed in time. Therefore, the damper will produce a negative stiffness effect, further improving the energy consumption capacity.

[0082] According to the tuned particle damper provided by the embodiment of the present invention, Figure 1 As shown, the above-mentioned screw mechanism 3 includes: a ball nut 32 and a ball screw 31, wherein the ball nut 32 is fixedly mounted on the second mounting portion 2 and connected to the ball screw 31; one end of the ball screw 31 is connected to the tuning particle rotating portion 4, for providing rotational force to the tuning particle rotating portion 4, and the other end of the ball screw 31 is provided with a limiting portion 33, which is used to limit the stroke of the ball nut 32.

[0083] The first mounting part 1 includes: an outer shell 11, a rotating chamber 12 and a sliding chamber 13 are provided in the outer shell 11, and the tuning particle rotating part 4 is rotatably installed in the rotating chamber 12; the second mounting part 2 includes: an inner shell 21, the outer shell 11 sets the inner shell 21 in the sliding chamber 13, and the inner shell 21 is slidingly connected to the outer shell 11; the ball nut 32 is fixedly installed on the inner wall of the inner shell 21, the ball screw 31 passes through the inner shell 21 and is connected to the tuning particle rotating part 4, and the axial direction of the ball screw 31 is consistent with the sliding direction of the inner shell 21.

[0084] In specific applications, the outer shell 11 can be obtained by welding and casting processes. It is a cylindrical cavity shell with one end open. A baffle is also provided inside the outer shell 11, and the inner cavity of the outer shell 11 is divided into a closed rotating cavity 12 and a semi-open sliding cavity 13; the inner shell 21 is a closed cylindrical cavity, and its outer diameter is slightly smaller than the inner diameter of the sliding cavity 13 to ensure that the inner shell 21 can slide in the sliding cavity 13 of the outer shell 11. At the same time, a plurality of guide strips can be axially arranged on the inner wall of the outer shell 11, and a plurality of guide grooves can be correspondingly opened axially on the outer wall of the inner shell 21. The cooperation of the guide strips and the guide grooves can constrain the inner shell 21 to rotate relative to the outer shell 11 during the sliding process.

[0085] The ball nut 32 is fixedly installed in the cavity of the inner shell 21 by bolts, and the central axis of the ball nut 32 coincides with the central axis of the inner shell 21, that is, it is installed at the center of the side wall of the inner shell 21, and a hole is opened on the side wall of the inner shell 21 corresponding to the inner hole of the ball nut 32 to facilitate the passage of the ball screw 31; in the rotating cavity 12 of the outer shell 11, the rotating column 41 is rotatably installed by the bearing 14, and the bearings 14 are respectively arranged at the outer wall of the outer shell 11 and the center of the above-mentioned baffle, and the rotating shaft 43 of the rotating column 41 is installed on the bearing 14, wherein the rotating column 41 and the rotating shaft 43 can be an integrally molded structure of the same material, or a pin-type fixed structure of different materials, that is, the rotating column 41 and the rotating shaft 43 rotate synchronously; one end of the ball screw 31 passes through the baffle and is fixedly connected to the rotating shaft 43 to keep the ball screw 31 and the rotating shaft 43 rotating synchronously; the other end of the ball screw 31 is fixedly welded with a limiting part 33, which is used to limit the stroke of the ball nut 32. The ball nut 32 is mounted on the ball screw 31 and is fixed to the side wall of the cavity of the inner shell 21 by a bolt assembly. When the inner shell 21 and the outer shell 11 slide relative to each other, the ball screw 31 drives the rotating shaft 43 and the rotating column 41 to rotate synchronously.

[0086] In this embodiment, the driving element of the rotating column 41 is configured as a ball screw pair. In addition to converting the translational motion of the outer shell 11 and the inner shell 21 into the rotational motion of the mass particles, it can also amplify the moment of inertia of the mass particles of the same mass and the same position through different screw leads. The relationship between them can be expressed by the following formula:

[0087]

[0088] I=mr 2 (2)

[0089] In formula (1), b represents the inertia coefficient (i.e., the amplified moment of inertia);

[0090] l is the lead of the ball screw 31 (the lead of the ball screw 31 is also called the pitch, which is the distance the nut moves linearly per one rotation of the screw. Common leads include 1, 2, 4, 6, 8, 10, 16, 20, 25, 32, and 40);

[0091] I is the moment of inertia of the mass particle 422 itself;

[0092] In formula (2), I is the moment of inertia of the mass particle 422 itself;

[0093] m is the mass of mass particle 422;

[0094] r is the distance from the mass particle 422 to the rotation axis 43;

[0095] From this, it can be seen that when the mass of the mass particle 422 and the distance from the rotating axis 43 are constant, the variable that can affect the final moment of inertia value is the lead of the ball screw 31. That is, the smaller the lead l, the greater the magnification of the moment of inertia I, and the larger the inertia coefficient b represents.

[0096] In the process of converting linear motion into rotational motion, the ball screw pair (i.e., the screw and nut) amplifies the rotational inertia of the particles, improves the control force of the damper, and reduces the mass ratio between the damper and the vibrating body; in addition, the screw lead can be changed to adapt to different vibration amplitudes.

[0097] According to the tuned particle damper provided by the embodiment of the present invention, Figure 3 As shown, the particle sliding cavity is filled with viscous liquid 423.

[0098] In a specific application, the particle sliding cavity or the arc-shaped sliding groove 42 can be filled with a viscous liquid 423 , and the viscous liquid 423 can be hydraulic oil, organic silicone oil, silicone-based glue or special suspension, etc.

[0099] The tuned particle damper provided by the embodiment of the present invention can achieve the effect of energy dissipation and vibration reduction by filling the particle sliding cavity or the arc-shaped chute 42 with a viscous liquid 423. When the particles slide, the viscous liquid 423 needs to convert the kinetic energy of the fluid into heat energy to dissipate it in order to overcome the friction within the molecules and the friction between the viscous liquid 423 and the particles, the wall of the arc-shaped chute 42, and the arc-shaped spring 421. Energy loss will also occur when the fluid cross-section suddenly changes, thereby achieving the effect of energy dissipation and vibration reduction. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tuned particle damper, characterized in that: include: a first mounting portion; a second mounting portion, slidably connected to the first mounting portion; a screw mechanism, disposed in the second mounting portion, for converting the linear sliding motion between the first mounting portion and the second mounting portion into a rotational motion and outputting the rotational motion; A tuning particle rotating part is rotatably mounted in the first mounting part, and an output end of the spiral mechanism is connected to the tuning particle rotating part to provide rotational force to the tuning particle rotating part; The tuning particle rotation unit comprises: A support member for supporting the particle sliding cavity; There are multiple particle sliding cavities that are independent of each other, and the particle sliding cavities are arranged on the support member, and mass particles are arranged in the particle sliding cavities; The particle sliding cavities are evenly distributed around the rotation axis of the support member; The support member includes a rotating column; The particle sliding cavity includes: an arc-shaped chute opened along the circumference of the rotating column, wherein the arc-shaped chute is provided in a plurality and is evenly distributed around the rotating axis of the rotating column; An arc spring is provided in the arc chute, one end of the arc spring is fixedly connected to the arc chute, and the other end of the arc spring is fixedly connected to the mass particle; The interconnected arc springs and the mass particles form a group of elastic mechanisms. An even number of elastic mechanisms greater than or equal to 2 is provided in the arc chute, and the even number of elastic mechanisms is equally divided into two parts, wherein one part of the arc springs is fixed on the side wall of the arc chute, and the other part of the arc springs is fixed on the opposite side wall of the arc chute. The mass particles are arranged facing each other and can move along the circumference of the rotating column, and the mass particles can collide with each other.

2. The tuned particle damper according to claim 1, characterized in that: The spiral mechanism comprises: Ball screw; a ball nut, fixedly mounted on the second mounting portion and connected to the ball screw; One end of the ball screw is connected to the tuning particle rotating part for providing rotational force to the tuning particle rotating part. The other end of the ball screw is provided with a limiting part for limiting the stroke of the ball nut.

3. The tuned particle damper according to claim 2, characterized in that: The first mounting portion includes: A housing, wherein a rotating cavity and a sliding cavity are provided in the housing, and the tuning particle rotating portion is rotatably installed in the rotating cavity; The second mounting portion includes: An inner shell, wherein the outer shell is sleeved in the sliding cavity, and the inner shell is slidably connected to the outer shell; The ball nut is fixedly mounted on the inner wall of the inner shell, the ball screw passes through the inner shell and is connected to the tuning particle rotating part, and the axial direction of the ball screw is consistent with the sliding direction of the inner shell.

4. The tuned particle damper according to claim 1, wherein: The particle sliding cavity is filled with viscous liquid.

5. The tuned particle damper according to claim 1, characterized in that: A plurality of the arc-shaped slots on the same radial cross section form an arc-shaped slot group, and the rotating column is provided with a plurality of the arc-shaped slot groups along the axial direction.

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