Rail non-linear energy sink device and cellular assembly

Abstract

The present application relates to a kind of track nonlinear energy sink device and cell component, device includes shell, track, vertical slide rail and movement component, movement component includes intermediate mass, mass slider, linear spring and gyro wheel, intermediate mass is realized the activity of two directions by horizontal and vertical direction's slide rail slide, and the circular arc surface of linear spring and slide rail contacted with mass slider between intermediate mass and mass slider is realized multidirectional motion damping.Compared with prior art, the present application has vibration reduction frequency bandwidth, and the advantages such as installation flexible and convenient are strong to complex working condition adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of passive vibration control, in particular to a track nonlinear energy sink device and a cellular assembly. BACKGROUND

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

[0003] At present, damping can be divided into linear damping and nonlinear damping. Linear damper is widely used due to its simple structure and easy maintenance. However, linear damper has good damping effect only at a specific frequency, and its damping 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 the linear damper has certain limitations. The proposal of nonlinear energy sink solves this problem, which can realize targeted energy transmission and has no linear stiffness, and can effectively broaden the damping frequency band. However, most nonlinear energy sinks have poor reliability, single 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 wide-frequency damper with stable structure, adaptability to various complex working conditions and flexible use.

[0005] The invention patent CN114483877B discloses a gravity compensation nonlinear energy sink damping device, a mass block can move along a vertical guide rail, and a vertical spring and two inclined springs are sleeved outside the guide rail, so as to realize gravity compensation and pure cubic stiffness of the nonlinear energy sink solving the vertical vibration problem. The three-spring structure can effectively withstand limited vibration directions, and has insufficient adaptability to various complex working conditions. SUMMARY

[0006] The purpose of the present application is to overcome the defects of the prior art and provide a track nonlinear energy sink device and a cellular assembly with reasonable structure design, which can realize wide-frequency damping, has high reliability, is suitable for complex vibration environment, and is convenient for flexible installation and application.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] According to one aspect of the present application, a track non-linear energy sink device is provided, comprising a housing, a track, a vertical slide rail and a moving assembly; the moving assembly comprises a middle mass, mass sliders and rollers, the number of mass sliders is two and they are movably connected to the two sides of the middle mass, the number of rollers is two and they are installed on the two sides of the mass sliders, the number of tracks is two and they are installed on the inner walls of the two sides of the housing, the inner surfaces of the tracks are concave arcs, the outer circles of the rollers are tangent to the arcs of the tracks; a plurality of bolt holes are provided on the two sides of the housing; the housing, the track, the vertical slide rail and the moving assembly constitute a track non-linear energy sink.

[0009] Further, the middle mass is provided with a plurality of vertical slides, the vertical slides are through holes penetrating the middle mass from top to bottom, the vertical slide rail is matched with the vertical slides, the upper and lower ends of the vertical slide rail are fixed on the inner walls of the upper and lower sides of the housing, the vertical slide rail passes through the vertical slides, and the middle mass moves up and down along the vertical slide rail.

[0010] Further, the middle mass is provided with a plurality of horizontal slides, the horizontal slides are through holes penetrating the middle mass from left to right, the mass sliders are provided with horizontal slide rails matched with the horizontal slides, the horizontal slide rails pass through the horizontal slides, and the middle mass moves left and right along the horizontal slide rails.

[0011] Further, the vertical slide rail and the vertical slide are gap matched, and the horizontal slide and the horizontal slide rail are gap matched.

[0012] Further, the housing comprises side plates, upper and lower plates and front and rear plates, the number of the side plates, the upper and lower plates and the front and rear plates is two, the side plates and the upper and lower plates are combined into a rectangular frame through bolt connection, and the front and rear plates are installed on the front and rear of the rectangular frame through bolt installation.

[0013] Further, the inner wall of the side plate is provided with a rectangular groove, the track is provided with a threaded hole and a boss matched with the rectangular groove, the boss of the track is installed in the rectangular groove of the inner wall of the side plate and is fixed through the threaded hole using a bolt.

[0014] Further, the inner wall of the upper and lower plates is provided with a blind hole matched with the vertical slide rail, the two ends of the vertical slide rail are inserted into the blind holes of the inner wall of the upper and lower plates to connect the vertical slide rail and the upper and lower plates.

[0015] Further, the moving assembly further comprises a linear spring, the outer side surface of the middle mass and the inner side surface of the mass slider are provided with two blind holes opposite to each other, and the two ends of the linear spring are clamped in the two blind holes.

[0016] Further, the moving assembly further comprises a roller pin and a snap spring, the tip of the mass slider is provided with a through hole, the roller pin passes through the through hole of the tip of the mass slider and the roller, and the snap spring is clamped at the end of the roller pin to limit the axial movement of the roller pin, thereby achieving the installation and connection of the roller and the mass slider.

[0017] According to another aspect of the present application, there is provided a cellular assembly of track nonlinear energy sinks, the assembly being formed by connecting a plurality of track nonlinear energy sinks through bolt holes on the lateral sides of the housings into an array assembly, the assembly form of the array assembly including vertical array assembly form, horizontal array assembly form and spatial array assembly form.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] 1. The present application proposes a combined structure of intermediate mass block and mass slider, the mass slider is in contact with the track installed on the inner side of the housing, and the contact surface is a designed arc surface. The intermediate mass block realizes movement in two directions through horizontal and vertical sliding rails, and the multi-directional motion damping is realized through the linear spring between the intermediate mass block and the mass slider and the circular arc surface of the mass slider in contact with the mass slider. Compared with the track nonlinear energy sink of spring, steel wire, leaf spring and the like, the present application can accurately control the nonlinear stiffness, eliminate the linear stiffness, effectively broaden the vibration damping frequency band, improve the vibration damping efficiency, and the increased amplitude limiting design makes the structure more reliable.

[0020] 2. The present application can accurately control the nonlinear stiffness by designing the arc track of the track, and the asymmetric track can reduce the threshold and improve the control effect on micro-vibration. By changing the shape of the track arc surface, the vibration under different working conditions can be controlled; by adding the gravity of the motion assembly to the calculation of the track, the influence of the gravity of the motion assembly on the vertical vibration can be eliminated.

[0021] 3. The present application is provided with bolt holes on both sides of the housing, and the track nonlinear energy sink can be combined into a cellular assembly through the bolt holes. The regular cubic housing design facilitates the spatial array combination of the track nonlinear energy sink, and the distributed arrangement mode will significantly improve the vibration damping effect of the track nonlinear energy sink. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of a track nonlinear energy sink device of the present application.

[0023] Figure 2 It is an exploded schematic diagram of a track nonlinear energy sink device of the present application.

[0024] Figure 3 It is an exploded schematic diagram of a motion assembly of a track nonlinear energy sink device of the present application.

[0025] Figure 4 It is a linear spring of a track nonlinear energy sink and a force-displacement curve of a track nonlinear energy sink of the present application.

[0026] Figure 5 It is a cellular application schematic diagram of a track nonlinear energy sink for suppressing vertical vibration of the present application.

[0027] Figure 6 A schematic diagram of a track non-linear energy sink cell application for suppressing horizontal vibration.

[0028] Figure 7 A schematic diagram of a track non-linear energy sink array combination.

[0029] 1, track non-linear energy sink, 2, side plate, 3, upper and lower plate, 4, front and rear plate, 5, track, 6, vertical slide rail, 7, motion assembly, 8, intermediate mass block, 9, vertical slide, 10, horizontal slide, 11, mass slider, 12, horizontal slide rail, 13, linear spring, 14, roller, 15, roller pin, 16, snap spring, 17, linear spring force-displacement curve, 18, track non-linear energy sink force-displacement curve, 19, vertical vibration table, 20, horizontal vibration table, 21, track non-linear energy sink cell vertical array combination, 22, track non-linear energy sink cell horizontal array combination, 23, track non-linear energy sink cell spatial array combination. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0031] As shown in Figure 1 and Figure 2 , a track non-linear energy sink device mainly includes a shell, a track 5, a vertical slide rail 6 and a motion assembly 7. The shell is composed of two side plates 2, two upper and lower plates 3 and two front and rear plates 4. Among them, the two side plates 2 and the two upper and lower plates 3 are installed by bolts to form a rectangular frame, and the two front and rear plates 4 are respectively installed at the front and rear of the rectangular frame by bolts. Both ends of the two vertical slide rails 6 are inserted into the blind holes reserved in the upper and lower plates 3, and penetrate into the vertical slides 9 of the intermediate mass blocks 8 contained in the motion assembly 7; the track 5 is provided with a boss and a threaded hole, and the corresponding position of the side plate 2 is provided with a rectangular groove, the two tracks 5 are respectively placed in the rectangular grooves of the two side plates 2, and are fixed by bolts to prevent the tracks 5 from twisting and shifting, the inner surface of the track 5 is arc-shaped, the end of the motion assembly is provided with a roller 14, and the arc surface is in contact with the roller 14.

[0032] As shown in Figure 3As shown, the motion assembly includes an intermediate mass block 8, a mass slider 11, a linear spring 13, rollers 14, roller pins 15, and retaining rings 16. In a preferred embodiment, the intermediate mass block 8 is provided with four horizontal slides 10, and each mass slider 11 is provided with four horizontal slide rails 12. The horizontal slide rails 12 are placed one-to-one within the horizontal slides 10, and two mass sliders 11 are respectively installed on both sides of the intermediate mass block 8. The rollers 14 are installed in the through holes reserved at the tips of the mass sliders 11 through the roller pins 15 and retaining rings 16; the linear springs 13 are placed in the blind holes of the mass sliders 11; the track nonlinear energy sink 1 is installed on the surfaces of the vertical vibration table 19 and the horizontal vibration table 20 using bolt holes on the side plate 2 in a distributed arrangement to reduce vibration.

[0033] In this embodiment, the vertical slide rail 6 and the vertical slide 10 are in clearance fit, which restricts the motion component 7 to move only in the y direction; the horizontal slide rail 6 and the horizontal slide 10 are in clearance fit, which restricts the mass slider 11 to move only in the x direction.

[0034] Specifically, the arc trajectory of track 5 is calculated; the nonlinear energy sink 1 of track can suppress vibrations under various complex working conditions such as different directions, different amplitudes, and different frequencies by changing the shape of the arc trajectory of track 5; as a preferred embodiment, the arc trajectory of track 5 can be designed as an asymmetric structure to reduce the threshold and improve the control effect on micro-amplitude vibrations.

[0035] Specifically, by increasing the slope at the end of the arc surface of the track 5, that is, increasing the stiffness at the end of the stroke of the motion component 7 on the basis of the original nonlinear stiffness, the range of motion is limited, thereby protecting the device.

[0036] In this embodiment, when the track nonlinear energy sink 1 is used for vertical vibration reduction, the track 5 takes into account the gravity of the moving component 7 in the calculation process of the arc trajectory of the track 5 in the horizontal direction to eliminate the influence of gravity.

[0037] During the motion of motion component 7 relative to the nonlinear energy sink 1 of the track, the outer circle of roller 14 is always tangent to the arc surface of track 5, and linear spring 12 stretches and shortens with the movement of mass slider 11 in the x direction; during the motion, the resultant force of motion component 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.

[0038] like Figure 4 As shown, the relationship between the force and displacement of the linear spring 12 can be represented by the linear spring force-displacement curve 17; the relationship between the nonlinear restoring force in the y-direction inside the track nonlinear energy sink 1 and the displacement of the mass slider 11 in the x-direction can be represented by the track nonlinear energy sink force-displacement curve 18.

[0039] In the embodiment, the shell of the track nonlinear energy sink 1 is a regular cubic structure; the side plate 2 of the shell is provided with a bolt hole, and the track nonlinear energy sink 1 is regarded as a cell and arranged in a cell distribution form at different positions of the structure to be damped; for example, the cell is arranged on the table surface of the vertical vibration table 19 and the horizontal vibration table 20, and the anti-vibration characteristics of the testing device are tested, as shown in Figure 5 and Figure 6 The arrow direction is the vibration direction.

[0040] As shown in Figure 7 A plurality of track nonlinear energy sinks 1 can be connected through the bolt holes on the shell, and the number of track nonlinear energy sink cells is adjusted according to the volume and mass of the structure to be damped to form a vertical array combination 21, a horizontal array combination 22 and a space array combination 23. The upper and lower plates 3 of the plurality of track nonlinear energy sinks 1 are connected to form the vertical array combination 21 of the cells; the side plates 2 and the front and rear plates 4 of the plurality of track nonlinear energy sinks 1 are connected to form the vertical array combination 22 of the cells; and the side plates 2, the upper and lower plates 3 and the front and rear plates 4 of the plurality of track nonlinear energy sinks 1 are connected to form the vertical array combination 23 of the cells.

[0041] The track nonlinear energy sink 1 of the present application has the following damping process: when an external excitation acts on the system, the vibrating system generates vibration; when the vibrating system is additionally provided with the track nonlinear energy sink 1 of the present application, the energy of the system is irreversibly transferred to the track nonlinear energy sink 1, and finally converted into mechanical energy and damping dissipation energy of the track nonlinear energy sink 1, so as to achieve the effect of suppressing the vibration of the system.

[0042] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A nonlinear orbital energy sink device and a cellular component, characterized in that, The track nonlinear energy sink device includes a shell, a track (5), a vertical slide rail (6), and a motion component (7); The motion component (7) includes an intermediate mass block (8), a mass slider (11), and rollers (14). There are two mass sliders (11) and they are movably connected to the intermediate mass block (8) on both sides. There are two rollers (14) and they are installed on both sides of the mass sliders (11). There are two tracks (5) and they are installed on the inner walls of both sides of the outer shell. The inner surface of the track (5) is a concave arc surface. The outer circle of the roller (14) is tangent to the arc surface of the track (5). The outer shell has multiple bolt holes on both sides; the outer shell, track (5), vertical slide rail (6) and motion component (7) constitute a track nonlinear energy sink (1); The intermediate mass block (8) is provided with multiple vertical slides (9). The vertical slides (9) are through holes that run vertically through the intermediate mass block (8). The vertical slide rail (6) cooperates with the vertical slides (9). The upper and lower ends of the vertical slide rail (6) are fixed to the inner walls of the upper and lower sides of the outer shell. The vertical slide rail (6) passes through the vertical slides (9). The intermediate mass block (8) moves up and down along the vertical slide rail (6). The intermediate mass block (8) is provided with multiple horizontal slides (10), the horizontal slides (10) are through holes that pass through the intermediate mass block (8) from left to right, the mass slider (11) is provided with a horizontal slide rail (12) that cooperates with the horizontal slides (10), the horizontal slide rail (12) passes through the horizontal slides (10), and the intermediate mass block (8) moves left and right along the horizontal slide rail (12); The outer shell includes a side plate (2), an upper and lower plate (3) and a front and rear plate (4). There are two of each of the side plate (2), upper and lower plate (3) and front and rear plate (4). The side plate (2) and upper and lower plate (3) are connected by bolts to form a rectangular frame. The front and rear plate (4) are installed at the front and rear of the rectangular frame by bolts. The inner wall of the side plate (2) is provided with a rectangular groove, and the track (5) is provided with a threaded hole and a boss that cooperates with the rectangular groove. The boss of the track (5) is installed in the rectangular groove of the inner wall of the side plate (2) and is fixed with bolts through the threaded hole. The inner wall of the upper and lower plates (3) is provided with blind holes that cooperate with the vertical slide rail (6). The two ends of the vertical slide rail (6) are inserted into the blind holes in the inner wall of the upper and lower plates (3) to connect the vertical slide rail (6) and the upper and lower plates (3). The motion component (7) also includes a linear spring (13). The outer side of the intermediate mass block (8) and the inner side of the mass slider (11) are provided with two opposing blind holes, and the two ends of the linear spring (13) are locked in the two blind holes. The motion component (7) also includes a roller pin (15) and a retaining ring (16). The tip of the mass slider (11) is provided with a through hole. The roller pin (15) passes through the through hole at the tip of the mass slider (11) and the roller (14). The retaining ring (16) is locked at the end of the roller pin (15) to restrict the axial movement of the roller pin (15), thereby realizing the installation connection between the roller (14) and the mass slider (11). The cellular component is composed of multiple orbital nonlinear energy sinks (1) connected in an array through bolt holes on the side of the outer shell. The array combination forms include vertical array combination, horizontal array combination and spatial array combination. The nonlinear energy sink (1) is regarded as a cell. Multiple nonlinear energy sinks (1) are connected through bolt holes on the shell. According to the volume mass of the structure to be vibration reduced, the number of nonlinear energy sink cells is adjusted to form a vertical array combination (21), a horizontal array combination (22), and a spatial array combination (23). The upper and lower plates (3) of multiple nonlinear energy sinks (1) are connected to form a vertical array combination (21) of cells. The side plates (2) and front and rear plates (4) of multiple nonlinear energy sinks (1) are connected to form a vertical array combination (22) of cells. The side plates (2), upper and lower plates (3), and front and rear plates (4) of multiple nonlinear energy sinks (1) are connected to form a vertical array combination (23) of cells.

2. The orbital nonlinear energy sink device and cellular component according to claim 1, characterized in that, The vertical slide rail (6) and the vertical slide track (9) are fitted with a clearance, and the horizontal slide track (10) and the horizontal slide rail (12) are fitted with a clearance.

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