Track nonlinear energy sink device and cellular component

Abstract

The invention relates to a track non-linear energy sink device and a cellular component, the device comprises a shell, a track, a vertical slide rail and a motion component, the motion component comprises a middle mass block, a mass slide block, a linear spring and a roller, the middle mass block realizes movement in two directions through slide rails and slide ways in horizontal and vertical directions, and the linear spring is connected with the roller. Multi-directional motion damping is realized through a linear spring between the middle mass block and the mass slide block and an arc surface where the slide rail is in contact with the mass slide block. Compared with the prior art, the damping device has the advantages of wide damping frequency band, high adaptability to complex working conditions, flexibility and convenience in installation and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of passive vibration control, and in particular to a track nonlinear energy sink device and a cellular component. Background Art

[0002] During the operation of mechanical equipment, vibrations will inevitably occur, and most vibrations are harmful. For example, the pipeline structure in nuclear industry engineering has the problem of excessive vibration amplitude, and the pipeline structure in marine engineering and the hydraulic system of aerospace engines are facing vibration reduction problems. The vibration reduction target in the above actual scenarios 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, easy manufacturing and maintenance. However, linear vibration absorbers only have good vibration reduction effects at specific frequencies, and their vibration reduction frequency band is narrow. However, in actual engineering, the vibration environment is diverse and complex, and the external excitation frequency is mostly changing, so linear vibration absorbers have certain limitations. The introduction of nonlinear energy sinks solves this problem. It can achieve targeted energy transfer, has no linear stiffness, and can effectively broaden the vibration reduction frequency band. However, most nonlinear energy sinks have problems such as poor reliability, single applicable working conditions, strong customization, and large size, which limit 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-band vibration absorber that has a stable structure, adapts to a variety of complex working conditions and is flexible to use.

[0005] Invention patent CN114483877B discloses a gravity-compensated nonlinear energy well vibration reduction device, in which the mass block can move along a vertical guide rail, and a vertical spring and two inclined springs sleeved outside the guide rail are used to achieve gravity compensation and pure cubic stiffness of the nonlinear energy well to solve the vertical vibration problem. The three-spring structure can effectively withstand limited vibration directions and is insufficient to adapt to a variety of complex working conditions. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a track nonlinear energy sink device and cellular component with reasonable structural design, capable of achieving wide-band vibration reduction, high reliability, suitable for complex vibration environments, and easy to flexibly install and apply.

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

[0008] According to one aspect of the present invention, a track nonlinear energy sink device is provided, comprising a shell, a track, a vertical slide rail and a motion component; the motion component comprises an intermediate mass block, a mass slider and a roller, the number of the mass sliders is two and they are movably connected with the intermediate mass block on both sides of the intermediate mass block, the number of the rollers is two and they are installed on both sides of the mass slider, the number of the tracks is two and they are installed on the inner walls of both sides of the shell, the inner surface of the track is a concave arc surface, and the outer circle of the roller is tangent to the arc surface of the track; a plurality of bolt holes are provided on both sides of the shell; the shell, the track, the vertical slide rail and the motion component constitute a track nonlinear energy sink.

[0009] Furthermore, the middle mass block is provided with a plurality of vertical slides, which are through holes penetrating the middle mass block from top to bottom. The vertical slide rails cooperate with the vertical slide rails, and the upper and lower ends of the vertical slide rails are fixed on the upper and lower inner walls of the outer shell. The vertical slide rails pass through the vertical slide rails, and the middle mass block moves up and down along the vertical slide rails.

[0010] Furthermore, the middle mass block is provided with a plurality of horizontal slides, which are through holes passing through the middle mass block from left to right. The mass slider is provided with horizontal slide rails matching with the horizontal slide rails, which pass through the horizontal slide rails, and the middle mass block moves left and right along the horizontal slide rails.

[0011] Furthermore, the vertical slide rail and the vertical slideway are clearance-fitted, and the horizontal slideway and the horizontal slide rail are clearance-fitted.

[0012] Furthermore, the shell includes side panels, upper and lower panels, and front and rear panels. The number of side panels, upper and lower panels, and front and rear panels is two each. The side panels and upper and lower panels are connected by bolts to form a rectangular frame, and the front and rear panels are installed at the front and rear of the rectangular frame by bolts.

[0013] Furthermore, a rectangular groove is provided on the inner wall of the side plate, a threaded hole and a boss matching the rectangular groove are provided on the track, the boss of the track is installed in the rectangular groove on the inner wall of the side plate and fixed with bolts through the threaded holes.

[0014] Furthermore, the inner walls of the upper and lower plates are provided with blind holes matching with the vertical slide rails, and both ends of the vertical slide rails are inserted into the blind holes of the inner walls of the upper and lower plates to connect the vertical slide rails and the upper and lower plates.

[0015] Furthermore, the motion component also includes a linear spring. Two opposite blind holes are provided on the outer side surface of the intermediate mass block and the inner side surface of the mass sliding block. Both ends of the linear spring are clamped in the two blind holes.

[0016] Furthermore, the motion component also includes a roller pin and a retaining spring. The tip of the mass slider is provided with a through hole. The roller pin passes through the through hole at the tip of the mass slider and the roller. The retaining spring is clamped at the end of the roller pin to limit the axial movement of the roller pin, thereby realizing the installation connection between the roller and the mass slider.

[0017] According to another aspect of the present invention, a cellular assembly of a track nonlinear energy sink is provided, wherein the assembly is composed of a plurality of track nonlinear energy sinks connected into an array combination through bolt holes on the side of the shell, and the combination forms of the array combination include a vertical array combination form, a horizontal array combination form and a spatial array combination form.

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

[0019] 1. The present invention proposes a combined structure of an intermediate mass block and a mass slider. The mass slider contacts a track installed on the inner side of the shell, and the contact surface is a designed arc surface. The intermediate mass block realizes movement in two directions through the horizontal and vertical slide rails, and multi-directional motion damping is realized through the linear spring between the intermediate mass block and the mass slider and the arc surface where the slide rail contacts the mass slider. Compared with nonlinear energy sinks of structures such as springs, steel wires, and leaf springs, this device can accurately control its nonlinear stiffness, eliminate linear stiffness, effectively broaden the vibration reduction frequency band, improve vibration reduction efficiency, and the added limiting design makes the structure more reliable.

[0020] 2. The present invention can accurately control the nonlinear stiffness by designing the arc track of the track. The asymmetric track can reduce the threshold and improve the control effect of micro-vibration. By changing the shape of the track arc surface, it can be used to control the vibration under different working conditions; adding the gravity of the moving component to the calculation of the track can eliminate the influence of the gravity of the moving component during vertical vibration.

[0021] 3. Bolt holes are provided on both sides of the shell of the present invention, and the track nonlinear energy sink can be composed of cellular components through the bolt holes. The regular cubic shell design is convenient for the spatial array combination of the track nonlinear energy sink cells, and the distributed arrangement will significantly improve the vibration reduction effect of the track nonlinear energy sink. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 This is a schematic diagram of an explosion of a track nonlinear energy sink device of the present invention.

[0024] Figure 3 It is a schematic diagram of the explosion of the motion components of a track nonlinear energy sink device of the present invention.

[0025] Figure 4 The invention discloses a track nonlinear energy sink linear spring and a track nonlinear energy sink force-displacement curve.

[0026] Figure 5 It is a schematic diagram of the cellular application of a track nonlinear energy sink to suppress vertical vibrations according to the present invention.

[0027] Figure 6 It is a schematic diagram of the cellular application of a track nonlinear energy sink to suppress horizontal vibrations according to the present invention.

[0028] Figure 7 This is a schematic diagram of a track nonlinear energy sink array combination of the present invention.

[0029] Among them: 1. Track nonlinear energy sink, 2. Side plates, 3. Upper and lower plates, 4. Front and rear plates, 5. Track, 6. Vertical slide rail, 7. Moving component, 8. Intermediate mass block, 9. Vertical slide, 10. Horizontal slide, 11. Mass slider, 12. Horizontal slide, 13. Linear spring, 14. Roller, 15. Roller pin, 16. Retaining spring, 17. Linear spring force-displacement curve, 18. Track nonlinear energy sink force-displacement curve, 19. Vertical vibration table, 20. Horizontal vibration table, 21. Vertical array combination of track nonlinear energy sink cells, 22. Horizontal array combination of track nonlinear energy sink cells, 23. Spatial array combination of track nonlinear energy sink cells. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] like Figure 1 and Figure 2 As shown, a track nonlinear energy sink device mainly includes a shell, a track 5, a vertical slide rail 6 and a motion component 7. The shell is composed of two side panels 2, two upper and lower panels 3 and two front and rear panels 4. Among them, the two side panels 2 and the two upper and lower panels 3 are installed by bolts to form a rectangular frame, and the two front and rear panels 4 are installed at the front and rear of the rectangular frame by bolts respectively. The two ends of the two vertical slide rails 6 are inserted into the blind holes reserved in the upper and lower panels 3, and pass through the vertical slide 9 of the intermediate mass block 8 contained in the motion component 7; the track 5 is provided with a boss and a threaded hole, and the corresponding position of the side panel 2 is provided with a rectangular groove. The two tracks 5 are respectively placed in the rectangular grooves of the two side panels 2 and fixed with bolts to prevent the track 5 from twisting and shifting. The inner surface of the track 5 is an arc surface, and a roller 14 is provided at the end of the motion component, and the arc surface contacts the roller 14.

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

[0033] In this embodiment, the vertical slide rail 6 and the vertical slideway 10 are clearance-fitted, and their function is to limit the motion component 7 to move only along the y direction; the horizontal slide rail 6 and the horizontal slideway 10 are clearance-fitted, and their function is to limit the mass slider 11 to move only along the x direction.

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

[0035] In particular, by increasing the slope of the end of the arc surface of the track 5, that is, on the basis of the original nonlinear stiffness, the stiffness of the end of the travel of the moving component 7 is increased to limit its movement range, 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 the gravity of the moving component 7 into account in the calculation process of the curved trajectory of the track 5 on the basis of the horizontal direction to eliminate the influence of gravity.

[0037] During the movement of the motion component 7 relative to the track nonlinear energy sink 1, the outer circle of the roller 14 is always tangent to the arc surface of the track 5, and the linear spring 12 extends and shortens as the mass slider 11 moves in the x direction; during the movement, the resultant force of the 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 a 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 a track nonlinear energy sink force-displacement curve 18.

[0039] In this embodiment, the outer shell of the track nonlinear energy sink 1 is a regular cubic structure; the side plate 2 of the outer shell is provided with bolt holes, and the track nonlinear energy sink 1 is regarded as a cell through the bolt holes of the side plate 2, and is arranged in different positions of the structure to be damped in the form of cell distribution; for example, the cell is arranged on the table surface of the vertical vibration table 19 and the horizontal vibration table 20 to test the vibration resistance characteristics of the device, such as Figure 5 and Figure 6 As shown, the arrow direction is the vibration direction.

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

[0041] A track nonlinear energy sink 1 of the present invention has the following vibration reduction process: when external excitation acts on the system, the vibration system generates vibration; when the vibration system is attached with the track nonlinear energy sink 1 of the present invention, 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, thereby achieving the effect of suppressing the vibration of the system.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A track nonlinear energy sink device, characterized in that: It comprises a housing, a track (5), a vertical slide rail (6) and a motion component (7); The motion assembly (7) comprises an intermediate mass block (8), a mass slider (11) and a roller (14); the mass sliders (11) are two in number and are movably connected to the intermediate mass block (8) on both sides of the intermediate mass block (8); the rollers (14) are two in number and are mounted on both sides of the mass slider (11); the tracks (5) are two in number and are mounted on the inner walls of both sides of the housing; the inner surface of the track (5) is a concave arc surface; and the outer circle of the roller (14) is tangent to the arc surface of the track (5); A plurality of bolt holes are arranged on both sides of the shell; the shell, the track (5), the vertical slide rail (6) and the motion component (7) form a track nonlinear energy sink (1).

2. A track nonlinear energy sink device according to claim 1, characterized in that: The intermediate mass block (8) is provided with a plurality of vertical slideways (9), wherein the vertical slideways (9) are through holes penetrating the intermediate mass block (8) from top to bottom, and the vertical slide rails (6) cooperate with the vertical slide rails (9). The upper and lower ends of the vertical slide rails (6) are fixed to the upper and lower inner walls of the outer shell, and the vertical slide rails (6) pass through the vertical slide rails (9), and the intermediate mass block (8) moves up and down along the vertical slide rails (6).

3. A track nonlinear energy sink device according to claim 2, characterized in that: The intermediate mass block (8) is provided with a plurality of horizontal slideways (10), wherein the horizontal slideways (10) are through holes penetrating the intermediate mass block (8) from left to right, and the mass slider (11) is provided with a horizontal slide rail (12) matched with the horizontal slide rail (10), wherein the horizontal slide rail (12) passes through the horizontal slide rail (10), and the intermediate mass block (8) moves from left to right along the horizontal slide rail (12).

4. A track nonlinear energy sink device according to claim 3, characterized in that: The vertical slide rail (6) and the vertical slideway (9) are clearance-fitted, and the horizontal slideway (10) and the horizontal slide rail (12) are clearance-fitted.

5. A track nonlinear energy sink device according to claim 1, characterized in that: The shell comprises side panels (2), upper and lower panels (3) and front and rear panels (4), the number of the side panels (2), upper and lower panels (3) and front and rear panels (4) are two each, the side panels (2) and upper and lower panels (3) are connected and assembled into a rectangular frame by bolts, and the front and rear panels (4) are installed at the front and rear of the rectangular frame by bolts.

6. A track nonlinear energy sink device according to claim 5, characterized in that: The inner wall of the side plate (2) is provided with a rectangular groove, the track (5) is provided with a threaded hole and a boss matched 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 by bolts through the threaded hole.

7. A track nonlinear energy sink device according to claim 6, characterized in that: The inner walls of the upper and lower plates (3) are provided with blind holes matching with the vertical slide rails (6), and the two ends of the vertical slide rails (6) are inserted into the blind holes of the inner walls of the upper and lower plates (3) to connect the vertical slide rails (6) and the upper and lower plates (3).

8. A track nonlinear energy sink device according to claim 1, characterized in that: The motion assembly (7) further comprises a linear spring (13), and two blind holes are arranged opposite to each other on the outer side surface of the intermediate mass block (8) and the inner side surface of the mass slider (11), and the two ends of the linear spring (13) are clamped in the two blind holes.

9. A track nonlinear energy sink device according to claim 1, characterized in that: The motion assembly (7) further comprises a roller pin (15) and a retaining spring (16); a through hole is provided at the tip of the mass slider (11); the roller pin (15) passes through the through hole at the tip of the mass slider (11) and the roller (14); the retaining spring (16) is clamped at the end of the roller pin (15) to limit the axial movement of the roller pin (15), thereby realizing the installation connection between the roller (14) and the mass slider (11).

10. A cellular component of an orbital nonlinear energy sink, characterized in that: The component is composed of a plurality of track nonlinear energy sinks (1) as described in any one of claims 1 to 9 connected into an array combination through bolt holes on the side of the shell, and the combination forms of the array combination include a vertical array combination form, a horizontal array combination form and a spatial array combination form.

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