Ball screw type particle collision damper

Abstract

The utility model provides a ball screw type particle collision damper, and relates to the technical field of dampers. The damper comprises an outer sleeve, the two ends of the outer sleeve are provided with a first opening and a second opening respectively, and a first space is formed in the outer sleeve; the inner sleeve is located in the first space and rotatably connected with the outer sleeve, a second space communicated with the first space is formed in the inner sleeve, and a containing cavity is formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve; particle balls are arranged in the accommodating cavity; the end, close to the second opening, of the inner sleeve is fixedly connected with a second mounting base. The ball screw comprises a screw rod and a nut, the nut is fixed at the first opening, one end of the screw rod is connected with a first mounting seat, and the other end of the screw rod extends into the second space through the first space. Axial vibration is converted into high-speed rotating motion, the number of times of collision between the particle balls is increased, the problem that the particle balls are difficult to collide when load excitation is small is solved, and the efficiency of the damper is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of dampers, and in particular to a ball screw type particle impact damper. Background Art

[0002] Under seismic loads, traditional energy-dissipating vibration reduction technologies are costly, and typical control devices can only absorb the system's kinetic energy, failing to dissipate it. Introducing an energy-dissipating mechanism into the device could further enhance its effectiveness. Therefore, vibration-reducing devices with energy-dissipating mechanisms have become a research focus in recent years.

[0003] Particle damping technology utilizes the friction and impact between tiny particles filled in the limited, enclosed space of a vibrating body to dissipate the system's vibration energy, thereby achieving a vibration reduction effect. It has the advantages of good durability, high reliability, insensitivity to temperature changes, and ease of use in harsh environments. The vibration reduction mechanism of a particle damper is based on friction energy dissipation, collision energy dissipation, and momentum exchange between particles. Vibration of the connected controlled building structure causes movement between particles. The damping effect generated by friction energy dissipation caused by relative sliding between particles and plastic energy dissipation caused by mutual inelastic collisions reduces the vibration of the controlled structure. However, existing particle collision dampers require the vibration of the controlled structure to increase to a certain level before vibration is initiated. When the load excitation is small, it is difficult for particles to collide with each other, and the vibration activation conditions are relatively harsh. Utility Model Content

[0004] The purpose of this application is to provide a ball screw type particle collision damper to address the above problems.

[0005] The present application provides a ball screw type particle impact damper, comprising:

[0006] an outer sleeve, wherein two ends of the outer sleeve respectively have a first opening and a second opening, and a first space is defined within the outer sleeve;

[0007] An inner sleeve, the inner sleeve being located in the first space and rotatably connected to the outer sleeve, the inner sleeve having a second space in communication with the first space, an accommodating cavity being formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve; a granular ball being arranged in the accommodating cavity; a second mounting seat being fixedly connected to one end of the inner sleeve adjacent to the second opening;

[0008] A ball screw includes a screw and a nut that cooperate with each other, the nut is fixed at the first opening, one end of the screw is connected to the first mounting seat, and the other end extends to the second space through the first space.

[0009] According to the technical solutions provided in certain embodiments of the present application, at least one baffle is provided in the accommodating cavity, and the baffle is fixed on the inner wall of the outer sleeve, with a gap left between the baffle and the outer wall of the inner sleeve.

[0010] According to the technical solution provided in certain embodiments of the present application, the outer sleeve includes a first sub-cylinder and a second sub-cylinder connected to each other; the inner diameter of the first sub-cylinder is smaller than the inner diameter of the second sub-cylinder, the end of the first sub-cylinder away from the second sub-cylinder is fixed to the nut, and the end of the first sub-cylinder close to the second sub-cylinder is rotatably connected to the inner sleeve; the end of the second sub-cylinder away from the first sub-cylinder is rotatably connected to the second mounting seat; the baffle is fixed to the inner wall of the second sub-cylinder.

[0011] According to the technical solutions provided in certain embodiments of the present application, the surface of the baffle is made of elastic material.

[0012] According to the technical solutions provided in certain embodiments of the present application, an end of the second sub-tube away from the first sub-tube is fixedly connected to an end cap; a through opening is provided on the end cap for the second mounting seat to pass through; and the second mounting seat is rotatably connected to the end cap.

[0013] According to the technical solutions provided in certain embodiments of the present application, the inner sleeve is rotatably connected to the first sub-cylinder via a first thrust bearing, and the second mounting seat is rotatably connected to the end cover via a second thrust bearing.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows: the damper of the present application can be used in a support frame system, which includes an outer sleeve and an inner sleeve rotatably connected to the outer sleeve, and the two are also connected by a ball screw. The ball screw can be used to convert linear motion into rotational motion. The first mounting seat is fixed to the end of the screw of the ball screw, and the second mounting seat is fixed to the end of the inner sleeve. When in use, the first mounting seat is fixed at the node of the beam-column connection structure, and the second mounting seat is fixed to the support energy dissipation structure. When the support frame system vibrates, it will act on the first mounting seat, thereby pushing the screw to move linearly. The ball screw will convert the axial motion of the screw into the rotational motion of the nut, so the nut will drive the outer sleeve to rotate, so that the particle balls between the inner sleeve and the outer sleeve will rub and collide with the inner wall of the outer sleeve and the outer wall of the inner sleeve, and the friction and collision between them will consume energy to achieve a good vibration reduction effect. By converting linear motion into high-speed rotational motion, the present application solves the problem that it is difficult for particles to collide when the load excitation is small, greatly improving the efficiency of the damper and broadening the application scenarios.

[0015] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution or beneficial effect is included in at least one embodiment. Therefore, the description of a technical feature, technical solution or beneficial effect in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 A schematic structural diagram of a ball screw type particle impact damper provided in an embodiment of the present application;

[0018] Figure 2 for Figure 1 Middle AA section view;

[0019] Figure 3 for Figure 1 Middle BB section view;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure viewed from above;

[0021] Figure 5 A structural schematic diagram of an application scenario of the ball screw type particle impact damper provided in an embodiment of the present application.

[0022] The text annotations in the figure represent:

[0023] 1. First mounting seat; 2. Screw; 3. Nut; 4. Outer sleeve; 41. First sub-sleeve; 42. Second sub-sleeve; 5. Inner sleeve; 6. Granular ball; 7. Baffle; 8. Second mounting seat; 9. First thrust bearing; 10. Second thrust bearing; 11. End cover; 100. Precast beam; 200. Precast column; 300. Support energy-consuming structure. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present application. Specifically, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined or explained in subsequent figures. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0026] Please refer to Figures 1 to 4 This embodiment provides a ball screw type particle impact damper, comprising:

[0027] An outer sleeve 4, wherein both ends of the outer sleeve 4 have a first opening and a second opening respectively, and a first space is defined within the outer sleeve 4;

[0028] An inner sleeve 5 is located in the first space and is rotatably connected to the outer sleeve 4. The inner sleeve 5 has a second space in communication with the first space. A receiving cavity is formed between the outer wall of the inner sleeve 5 and the inner wall of the outer sleeve 4. A granular ball 6 is provided in the receiving cavity. A second mounting seat 8 is fixedly connected to one end of the inner sleeve 5 near the second opening.

[0029] The ball screw includes a screw rod 2 and a nut 3 that cooperate with each other. The nut 3 is fixed at the first opening. One end of the screw rod 2 is connected to the first mounting seat 1, and the other end extends into the second space through the first space.

[0030] Specifically, the outer sleeve 4 is hollow inside and open at both ends. Figure 2 The opening in the upper middle is called the first opening, located Figure 2The opening in the middle and lower part is called the second opening. The two openings are respectively connected to the first space. An inner sleeve 5 is rotatably provided in the outer sleeve 4. The inner sleeve 5 is hollow inside and open at both ends. The length of the inner sleeve 5 is smaller than the length of the outer sleeve 4. The lower opening of the inner sleeve 5 is aligned with the second opening. The upper opening of the inner sleeve 5 is located below the first opening. The outer diameter of the inner sleeve 5 is smaller than the inner diameter of the outer sleeve 4 at its corresponding position, that is, an annular accommodating cavity is formed between the two, and the granular balls used for collision vibration reduction are arranged in the accommodating cavity.

[0031] A ball screw is an ideal product for converting rotary motion into linear motion, or converting linear motion into rotary motion. In this application, the product characteristic of the ball screw that converts linear motion into rotary motion is utilized. Since the present invention converts horizontal vibration into rotational motion through the screw 2, the screw 2 bears a large axial load. Therefore, when designing and selecting the screw 2, a larger helix angle can be taken within a reasonable range, thereby improving the transmission effect of the ball screw and its axial stiffness at the same time, that is, improving the axial bearing capacity of the screw 2, thereby ensuring its normal use in the structure.

[0032] The nut 3 is fixed at the first opening by a bolt, and the screw rod 2 that cooperates with it passes through the nut 3, with one end located outside the first space and the other end extending into the second space through the first space. The end located outside is fixedly connected to the first mounting seat 1.

[0033] refer to Figure 5 , Figure 5 A structural schematic diagram of the application scenario of the ball screw type particle collision damper provided in this embodiment, namely, an energy-absorbing support frame system, in which a precast beam 100, a precast column 200, a support energy-absorbing structure 300 and a ball screw type particle collision damper are included, wherein the support energy-absorbing structure 300 includes an approximately herringbone-shaped support rod, and the two free ends of the support rod are respectively connected to the two connection points below the precast beam 100 and the precast column 200 through a node plate, the top of the support rod is connected to the second mounting seat 8 of the particle collision damper, and the first mounting seat 1 of the particle collision damper is connected to one of the connection points above the precast beam 100 and the precast column 200 through a node plate.

[0034] When an earthquake occurs or the support frame system vibrates due to other external factors, the vibration will act on the first mounting seat 1, thereby pushing the screw 2 to move horizontally. The ball screw will convert the axial movement of the screw 2 into the rotational movement of the nut 3, so the nut 3 will drive the outer sleeve 4 to rotate, causing the granular balls 6 between the inner sleeve 5 and the outer sleeve 4 to rub and collide with the inner wall of the outer sleeve 4 and the outer wall of the inner sleeve 5, and rub and collide with each other, thereby consuming energy to achieve a good vibration reduction effect.

[0035] Furthermore, at least one baffle 7 is provided in the accommodating cavity. The baffle 7 is fixed on the inner wall of the outer sleeve 4 and a gap is left between the baffle 7 and the outer wall of the inner sleeve 5 .

[0036] Specifically, refer to Figure 3 The outer sleeve 4 is provided with a plurality of baffles 7, each of which is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7. The outer sleeve 4 is provided with a plurality of baffles 7.

[0037] Furthermore, the outer sleeve 4 includes a first sub-cylinder 41 and a second sub-cylinder 42 connected to each other; the inner diameter of the first sub-cylinder 41 is smaller than the inner diameter of the second sub-cylinder 42, the end of the first sub-cylinder 41 away from the second sub-cylinder 42 is fixed to the nut 3, and the end of the first sub-cylinder 41 close to the second sub-cylinder 42 is rotatably connected to the inner sleeve 5; the end of the second sub-cylinder 42 away from the first sub-cylinder 41 is rotatably connected to the second mounting seat 8; the baffle 7 is fixed to the inner wall of the second sub-cylinder 42.

[0038] Specifically, the outer sleeve 4 includes two sub-cylindrical cylinders, namely a first sub-cylinder 41 with a smaller inner diameter and outer diameter and a second sub-cylinder 42 with a relatively larger inner diameter and outer diameter. The top opening of the first sub-cylinder 41 is a first opening, the bottom opening of the first sub-cylinder 41 is integrally connected to the top opening of the second sub-cylinder 42, and the bottom opening of the second sub-cylinder 42 is a second opening. The top of the inner sleeve 5 is located at the bottom of the first sub-cylinder 41, and the two are rotatably connected.

[0039] Furthermore, the surface of the baffle 7 is made of elastic material.

[0040] Specifically, to maximize particle collision energy dissipation, an elastic material is applied to the surface of baffle 7. This allows the pellets 6 to fully dissipate energy through collision and friction within the cavity as the outer sleeve 4 rotates, achieving a more ideal vibration damping effect. Furthermore, the particle size, fill rate, and friction coefficient of the pellets within the cavity can be adjusted to suit specific usage scenarios, increasing the damper's versatility and significantly reducing both cost and workload.

[0041] It should be noted that the entire baffle 7 may be made of elastic material, or the baffle 7 may be made of a hard body with a layer of elastic material wrapped around the outside.

[0042] Furthermore, the end of the second sub-tube 42 away from the first sub-tube 41 is fixedly connected to the end cover 11; the end cover 11 is provided with a through hole for the second mounting seat 8 to pass through; the second mounting seat 8 is rotatably connected to the end cover 11.

[0043] Specifically, the end cover 11 is fixedly connected to the second sub-tube 42 by bolts. A through hole is provided on the end cover 11, and the second mounting seat 8 extends from the through hole and is fixedly connected to the inner sleeve 5. The provision of the end cover 11 can facilitate the assembly of the damper.

[0044] Furthermore, the inner sleeve 5 is rotatably connected to the first sub-cylinder 41 via a first thrust bearing 9 , and the second mounting seat 8 is rotatably connected to the end cover 11 via a second thrust bearing 10 .

[0045] Specifically, a circle of protrusions is formed on the lower part of the inner wall of the first sub-cylinder 41 in the axial direction, and the first sub-cylinder 41 is installed with the first thrust bearing 9 through the circle of protrusions; the part of the second mounting seat 8 located in the through-opening forms a circle of bosses, the bottom of the bosses is used to block the second opening to prevent the granular balls 6 from falling, and the shoulder of the bosses is used to install the second thrust bearing 10. The bottom of the end cover 11 is bent inward to form a circle of mounting portions, and the second thrust bearing 10 is installed through the mounting portions; by adopting the thrust bearing, the axial movement of the nut can be limited.

[0046] Furthermore, the granular balls are steel spheres, and by controlling the filling rate of the granular balls, the device can be prevented from getting stuck during use.

[0047] The ball screw type particle collision damper provided in this embodiment transmits the vibration of the structure to the screw 2 in the ball screw. The screw 2 moves axially, and the ball screw converts the axial motion into the rotational motion of the axial limiting nut 3. At this time, the outer sleeve 4 installed on the nut 3 rotates, and the outer sleeve 4 rotates relative to the inner sleeve 5, so that the particle balls 6 located between the outer sleeve 4 and the inner sleeve 5 collide with other surrounding structures to consume energy, achieving a good vibration reduction effect. The combination of the particle damping shock absorption and the ball screw of the present invention is different from the vibration reduction form of the traditional damper. When the damper body is in effect, it converts the axial vibration into a higher speed rotational motion, avoiding the problem that the particles are difficult to collide when the load excitation is small, greatly improving the efficiency of the damper and broadening the application scenarios.

[0048] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A ball screw type particle impact damper, characterized in that: include: An outer sleeve (4), wherein two ends of the outer sleeve (4) respectively have a first opening and a second opening, and a first space is formed inside the outer sleeve (4); An inner sleeve (5), the inner sleeve (5) being located in the first space and rotatably connected to the outer sleeve (4), the inner sleeve (5) comprising a second space in communication with the first space, an accommodating cavity being formed between the outer wall of the inner sleeve (5) and the inner wall of the outer sleeve (4); a granular ball (6) being provided in the accommodating cavity; and a second mounting seat (8) being fixedly connected to one end of the inner sleeve (5) close to the second opening; A ball screw, comprising a screw rod (2) and a nut (3) that cooperate with each other, wherein the nut (3) is fixed at the first opening, one end of the screw rod (2) is connected to the first mounting seat (1), and the other end extends through the first space to the second space.

2. The ball screw type particle impact damper according to claim 1, characterized in that: At least one baffle (7) is provided in the accommodating cavity. The baffle (7) is fixed on the inner wall of the outer sleeve (4) and a gap is left between the baffle (7) and the outer wall of the inner sleeve (5).

3. The ball screw type particle impact damper according to claim 2, characterized in that: The outer sleeve (4) comprises a first sub-sleeve (41) and a second sub-sleeve (42) connected to each other; the inner diameter of the first sub-sleeve (41) is smaller than the inner diameter of the second sub-sleeve (42); the end of the first sub-sleeve (41) away from the second sub-sleeve (42) is fixed to the nut (3); the end of the first sub-sleeve (41) close to the second sub-sleeve (42) is rotatably connected to the inner sleeve (5); the end of the second sub-sleeve (42) away from the first sub-sleeve (41) is rotatably connected to the second mounting seat (8); and the baffle (7) is fixed to the inner wall of the second sub-sleeve (42).

4. The ball screw type particle impact damper according to claim 3, characterized in that: The surface of the baffle (7) is made of elastic material.

5. The ball screw type particle impact damper according to claim 3, characterized in that: An end of the second sub-tube (42) away from the first sub-tube (41) is fixedly connected to an end cap (11); a through opening for the second mounting seat (8) to pass through is provided on the end cap (11); and the second mounting seat (8) is rotatably connected to the end cap (11).

6. The ball screw type particle impact damper according to claim 5, characterized in that: The inner sleeve (5) is rotatably connected to the first sub-sleeve (41) via a first thrust bearing (9), and the second mounting seat (8) is rotatably connected to the end cover (11) via a second thrust bearing (10).

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