Track-type nonlinear energy sink with embedded particle damping and application of track-type nonlinear energy sink

Abstract

The invention discloses a track type nonlinear energy sink embedded with particle damping and application thereof.The track type nonlinear energy sink comprises a shell and a movement assembly, the particle damping is embedded in a middle mass block in the movement assembly, movement in the X direction and the Y direction is achieved through cooperation of a track and a sliding rail, and the movement assembly is matched with a cambered surface track installed on the shell through a rolling wheel; the nonlinear rigidity is accurately controlled by designing the cambered surface track of the track, the influence of the linear rigidity is eliminated, the vibration reduction frequency band is effectively widened, and the vibration reduction efficiency is improved. The asymmetric track can reduce the threshold value and improve the control effect on micro-amplitude vibration, vibration under different working conditions can be controlled by changing the shape of the arc face of the track, the gravity of the movement assembly is added into calculation of the track, and the influence of the gravity of the movement assembly during vertical vibration can be eliminated; the regular cubic shell design facilitates device cell element space array combination, and the distributed arrangement mode remarkably improves the vibration reduction effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of passive vibration control, and more particularly to an embedded particle damping track type nonlinear energy sink and application thereof. BACKGROUND

[0002] With the development of modern industrial technology, more and more mechanical equipment is applied to engineering practice. In the process of mechanical equipment operation, vibration will inevitably be generated, and most of the vibration is harmful. For example, the pipe structure in nuclear industry engineering has the problem of excessive vibration amplitude, the pipe structure in marine engineering and the hydraulic system of aerospace engine are faced with vibration damping problems, etc. The vibration reduction target in the above actual scene is often a multi-frequency vibration control problem.

[0003] At present, vibration reduction can be divided into linear vibration reduction and nonlinear vibration reduction. Linear vibration absorbers are widely used due to their simple structure and easy maintenance. However, linear vibration absorbers only have good vibration reduction effect at a specific frequency, and their vibration reduction frequency band is narrow. However, in actual engineering, the vibration environment is diverse and complex, and the excitation frequency of the external environment is mostly variable, so linear vibration absorbers have certain limitations. The proposal of nonlinear energy sink solves this problem, which can realize targeted energy transfer and does not have linear stiffness, and can effectively broaden the vibration reduction frequency band. However, most nonlinear energy sinks have poor reliability, single applicable working condition, strong customization, and large volume, which limits their application in industrial production.

[0004] Therefore, in order to solve the problem of excessive vibration in industrial production, it is urgent to create a wideband vibration absorber with stable structure, adaptable to various complex working conditions and flexible to use. SUMMARY

[0005] Therefore, the present application provides an embedded particle damping track type nonlinear energy sink and its application method, which has a reasonable structure design, can realize wideband vibration reduction, has high reliability, is suitable for complex vibration environment, and its cell design and distributed arrangement method facilitates flexible installation and application, and improves the overall vibration control effect.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] An embedded particle damping track type nonlinear energy sink, comprising an outer shell composed of front and rear side plates, upper and lower side plates and left and right side plates, and a movement assembly installed in the outer shell;

[0008] Screw holes are arranged on the outer shell;

[0009] The movement assembly comprises a middle mass block and mass blocks at both ends of the middle mass block;

[0010] The front and rear side plates are internally provided with vertically arranged tracks, and the mass slider is provided with a roller away from one side of the intermediate mass block, which matches the tracks;

[0011] The upper and lower side plates are provided with position corresponding blind holes one;

[0012] The mass slider is provided with a blind hole two at the center;

[0013] The intermediate mass block is provided with horizontal and vertical slides and a blind hole three;

[0014] The front and rear side plates are provided with position corresponding blind holes four;

[0015] The vertical slide is slidably matched and connected with a vertical slide rail through a sleeve one, and the vertical slide rail is installed at both ends of the blind hole one;

[0016] The horizontal slide is provided with a sleeve two at both ends located at both sides of the intermediate mass block, and the horizontal slide is slidably matched and connected with a horizontal slide rail, and the horizontal slide rail is installed in the blind hole four through the sleeve two and the mass slider in sequence;

[0017] The blind hole two and the blind hole three are installed with a linear spring;

[0018] The intermediate mass block is placed with particles, and the intermediate mass block is closed by a container cover plate.

[0019] Preferably, the front and rear side plates, the upper and lower side plates and the left and right side plates are assembled by bolt connection.

[0020] Preferably, the sleeve two and the intermediate mass block are provided with a clasp spring one and a clasp spring three.

[0021] Preferably, the track is an arc surface track, the roller moves in the arc surface, and the roller is always tangent to the arc surface. The arc surface track of the two tracks includes symmetry and asymmetry.

[0022] Preferably, the track is provided with a limiting block at both ends, thereby protecting the device.

[0023] When designing the arc surface, the gravity of the moving assembly is added to the calculation process of the track arc surface track, so as to eliminate the influence of gravity in vertical vibration reduction.

[0024] Preferably, the roller is installed on the mass slider through a roller pin and a clasp spring two.

[0025] Preferably, the track is installed on the front and rear side plates through a bolt.

[0026] The application further provides application of the track type nonlinear energy sink embedded with particle damping.

[0027] Preferably, the track type nonlinear energy sink embedded with particle damping is arranged in a whole column combination.

[0028] Via the technical solution, compared with the prior art, the application provides a track type nonlinear energy sink embedded with particle damping and application thereof, and has the following beneficial effects.

[0029] Compared with the nonlinear energy sink with structures such as spring, steel wire and plate spring, the device can accurately control the nonlinear stiffness, eliminate the linear stiffness, effectively widen the vibration reduction frequency band, improve the vibration reduction efficiency, and make the structure more reliable by the increased amplitude limiting design.

[0030] The device has more functions, and in the case of the unchanged overall structure, the vibration in different directions, different amplitudes and different frequencies and other complex working conditions can be inhibited by adjusting the track of the track arc surface, and the asymmetric track can reduce the threshold and improve the control effect on the micro-amplitude vibration.

[0031] The device is designed in the form of regular cubic cells, is convenient for spatial array combination, is more flexible in the distributed cell arrangement for structures with different frequencies, and can effectively improve the overall vibration reduction effect. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only belong to the embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0033] Figure 1 is a structural schematic diagram of the track type nonlinear energy sink embedded with particle damping of the application;

[0034] Figure 2 is an exploded schematic diagram of the track type nonlinear energy sink embedded with particle damping of the application;

[0035] Figure 3 is an exploded schematic diagram of a motion assembly of the track type nonlinear energy sink embedded with particle damping of the application;

[0036] Figure 4 is a cellular application schematic diagram of the track type nonlinear energy sink embedded with particle damping of the application for inhibiting vertical vibration;

[0037] Figure 5 Figure 1 is a schematic diagram of the application of the embedded particle damping track type nonlinear energy sink cell to suppress horizontal vibration;

[0038] Figure 6 Figure 2 is a schematic diagram of the array combination of the embedded particle damping track type nonlinear energy sink of the application;

[0039] Wherein: 1, the shell, 2, front and rear side plates, 3, upper and lower side plates, 4, left and right side plates, 5, track, 6, vertical slide rail, 7, movement assembly, 8, mass slider, 9, spring, 10, horizontal slide rail, 111, sleeve one, 112, sleeve two, 12, intermediate mass block, 13, container cover plate, 14, roller pin, 15, roller, 16, snap spring two, 17, snap spring one, 18, snap spring three, 19, horizontal slide rail, 20, blind hole three, 21, vertical slide, 22, particles, 23, vertical vibration table, 24, horizontal vibration table, 25, vertical array combination, 26, horizontal array combination, 27, spatial array combination. DETAILED DESCRIPTION

[0040] The technical solutions of the application will be described clearly and completely below in combination with the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0041] Embodiment 1

[0042] As shown in the accompanying drawings, the embedded particle damping track type nonlinear energy sink comprises a shell 1 composed of front and rear side plates 2, upper and lower side plates 3 and left and right side plates 4 assembled by bolts, and a movement assembly 7 installed in the shell 1. Figures 1-2 The shell 1 is provided with bolt holes, which are arranged on the outer surface of the front and rear side plates 2.

[0043] As shown in the accompanying drawings, the movement assembly 7 comprises an intermediate mass block 12 and mass sliders 8 at both ends of the intermediate mass block 12.

[0044] Figures 2-3 The inner side surfaces of the two front and rear side plates 2 are both provided with vertically arranged tracks 5 installed by bolts, the side of the mass slider 8 away from the intermediate mass block 12 is provided with a roller 15 installed by a roller pin 14 and a snap spring two 16, the roller 15 matches the track 5, the track 5 is an arc surface track, the roller 15 moves in the arc surface and the roller 15 is always tangent to the arc surface, and the track 5 is provided with a limiting block at both ends.

[0045] The inner side surfaces of the two front and rear side plates 2 are both provided with vertically arranged tracks 5 installed by bolts, the side of the mass slider 8 away from the intermediate mass block 12 is provided with a roller 15 installed by a roller pin 14 and a snap spring two 16, the roller 15 matches the track 5, the track 5 is an arc surface track, the roller 15 moves in the arc surface and the roller 15 is always tangent to the arc surface, and the track 5 is provided with a limiting block at both ends. ​

[0046] The upper and lower side plates 3 are provided with position corresponding blind hole one, and the position of the blind hole one corresponds to the position of the vertical slide 21;

[0047] The mass slider 8 is provided with blind hole two at the center;

[0048] The intermediate mass block 12 is provided with four horizontal slides 19, two vertical slides 21, and blind hole three 20 arranged at the center of the side facing the front and rear side plates 2;

[0049] The front and rear side plates 2 are provided with position corresponding blind hole four, and the position of the blind hole four corresponds to the position of the four horizontal slides 19;

[0050] The vertical slide 21 is slidably connected with the vertical slide rail 6 through the sleeve one 111, and the two ends of the vertical slide rail 6 are installed in the blind hole one;

[0051] The two ends of the horizontal slide 19 are arranged with the snap spring three 18, the snap spring one 17 and the sleeve two 112 in sequence on the two sides of the intermediate mass block 12, the horizontal slide 19 is slidably connected with the horizontal slide rail 10, and the two ends of the horizontal slide rail 10 pass through the snap spring one 17, the snap spring three 18, the sleeve two 112 and the mass slider 8 in sequence and are installed in the blind hole four;

[0052] The linear spring 9 is installed between the blind hole two and the blind hole three;

[0053] The intermediate mass block 12 is placed with the particles 22, and the intermediate mass block 12 is closed by the container cover plate 13.

[0054] In the whole device, the vertical slide rail 6 and the vertical slide 21 are gap matched to limit the movement assembly 7 to move only in the y direction; the horizontal slide rail 10 and the horizontal slide 19 are gap matched to limit the mass slider 8 to move only in the x direction.

[0055] The arc track of the track 5 is calculated, and the arc track shape of the track 5 can be changed to suppress vibration under different directions, different amplitudes, different frequencies and other complex working conditions; the arc track of the track 5 can be designed as an asymmetric structure to reduce the threshold and improve the control effect on micro-amplitude vibration; the gravity of the movement assembly 7 is added to the arc track calculation process of the track 5 in the horizontal direction, so as to eliminate the influence of gravity.

[0056] During the movement, the linear spring 9 is elongated and shortened with the movement of the mass slider 8 in the x direction; the resultant force of the movement assembly 7 in the x direction is 0, and the resultant force in the y direction has a cubic nonlinear relationship with the displacement in the x direction.

[0057] As Figures 4-6The application of the track type nonlinear energy sink embedded with particle damping is shown, wherein Figure 4 Fig. 3 is a schematic diagram of the cellular distribution mounting structure for suppressing vertical vibration on the vertical vibration table 23;

[0058] Figure 5 Fig. 4 is a schematic diagram of the cellular distribution mounting structure for suppressing horizontal vibration on the horizontal vibration table 24, Figure 6 Fig. 5 is a schematic diagram of the array combination of each cell according to the volume mass of the damping structure, including the vertical array combination 25, the horizontal array combination 26 and the space array combination 27.

[0059] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0060] The above description of the disclosed embodiments enables a person skilled in the art to carry out or use the present application. Various modifications to the embodiments will be apparent 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 application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An orbital nonlinear energy sink with embedded particle damping, characterized in that: It comprises a housing (1) composed of front and rear side panels (2), upper and lower side panels (3) and left and right side panels (4), and a motion component (7) installed in the housing (1); The housing (1) is provided with bolt holes; The motion assembly (7) includes an intermediate mass block (12) and mass sliders (8) at both ends of the intermediate mass block (12); A vertically arranged track (5) is installed inside the front and rear side plates (2); a roller (15) is provided on a side of the mass slider (8) away from the middle mass block (12); the roller (15) matches the track (5); The upper and lower side plates (3) are provided with blind holes 1 at corresponding positions; A second blind hole is provided at the center of the mass slider (8); The intermediate mass block (12) is provided with a horizontal slideway (19), a vertical slideway (21) and a third blind hole (20); The front and rear side plates (2) are provided with four blind holes corresponding in position; The vertical slideway (21) is slidably connected to a vertical slide rail (6) via a sleeve (111), and both ends of the vertical slide rail (6) are installed in a blind hole (1); The two ends of the horizontal slideway (19) are located on both sides of the middle mass block (12), and a second sleeve (112) is provided. The horizontal slideway (19) is slidably matched with a horizontal slide rail (10). The two ends of the horizontal slide rail (10) pass through the second sleeve (112) and the mass slider (8) in sequence and are installed in the fourth blind hole. A linear spring (9) is installed between the second blind hole and the third blind hole; Particles (22) are placed in the intermediate mass block (12), and the intermediate mass block (12) is sealed with a container cover (13).

2. The track-type nonlinear energy sink with embedded particle damping according to claim 1, characterized in that: The front and rear side panels (2), the upper and lower side panels (3) and the left and right side panels (4) are connected and assembled by bolts.

3. The track-type nonlinear energy sink with embedded particle damping according to claim 1, characterized in that: A first retaining spring (17) and a third retaining spring (18) are provided between the second sleeve (112) and the intermediate mass block (12).

4. The track-type nonlinear energy sink with embedded particle damping according to claim 1, characterized in that: The track (5) is a curved track, the roller (15) moves in the curved surface, and the roller (15) is always tangent to the curved surface.

5. The track-type nonlinear energy sink with embedded particle damping according to claim 1, characterized in that: Limit blocks are provided at both ends of the track (5).

6. The track-type nonlinear energy sink with embedded particle damping according to claim 1, characterized in that: The roller (15) is mounted on the mass slider (8) via a roller pin (14) and a second retaining spring (16).

7. The track-type nonlinear energy sink with embedded particle damping according to claim 1, characterized in that: The rails (5) are mounted on the front and rear side panels (2) via bolts.

8. An application of the track-type nonlinear energy sink with embedded particle damping according to any one of claims 1 to 7, characterized in that: The track-type nonlinear energy sink with embedded particle damping is arranged in a cellular manner on the structure to be damped, and the vertical slideway (21) is consistent with the vibration direction.

9. The use according to claim 8, characterized in that The orbital nonlinear energy sinks of the embedded particle dampers are combined in an array.

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