A coupled system vibration absorber based on multiphase lattice microstructure

Abstract

The present invention provides a vibration damper based on a multiphase lattice microstructure coupling system, which relates to the field of vibration damping control and additive manufacturing technology, including: a multi-layer vibration damping layer; a multiphase lattice layer, the multiphase lattice layer is arranged between adjacent vibration damping layers, the vibration damping layer and the multiphase lattice layer are both made of Ti‑6Al‑4V alloy, and the multiphase lattice layer is filled with rubber particles. The vibration damper is made of Ti‑6Al‑4V alloy by selective laser melting technology and is printed layer by layer. Compared with traditional rubber vibration dampers, it has better mechanical properties and stability, can maintain good energy absorption performance in extremely cold and extremely hot environments, and can overcome the influence of temperature on vibration damping performance.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction control and additive manufacturing, and in particular to a coupling system vibration reducer based on a multi-phase lattice microstructure. Background Art

[0002] Viscoelastic rubber shock absorbers are widely used in the fields of anti-seismic engineering structures and aerospace vibration reduction. Viscoelastic rubber shock absorbers have high elasticity and viscoelasticity, which enables them to withstand repeated compression and stretching while absorbing and releasing energy. Rubber shock absorbers have large elastic deformation and small elastic modulus, which have obvious advantages in vibration reduction effect compared with steel. In addition, the impact stiffness of rubber is greater than the dynamic stiffness, and the dynamic stiffness is greater than the static stiffness, which helps to reduce impact deformation and dynamic deformation and improve vibration reduction efficiency.

[0003] However, traditional viscoelastic rubber shock absorbers generally have the following shortcomings:

[0004] 1. Rubber performance is greatly affected by ambient temperature, and there are problems such as low-temperature instantaneous hardening, low-temperature crystallization hardening, hysteresis heat generation, and decreased high-temperature energy consumption performance.

[0005] 2. Traditional rubber shock absorbers often cause the rubber material to loosen and age due to long-term use, which in turn affects its life and vibration reduction performance.

[0006] 3. Traditional rubber shock absorbers are usually composed of steel plates and rubber materials. The steel plates and rubber materials are usually made separately and then combined through a vulcanization process, which has the disadvantages of high cost and complex process.

[0007] In view of this, how to provide a shock absorber that can overcome the influence of temperature and has high performance stability is a key common technology in the field of engineering structure seismic resistance and aerospace vibration reduction. Summary of the invention

[0008] The purpose of the present invention is to provide a coupling system damper based on a multi-phase lattice microstructure to solve the problems existing in the prior art, overcome the influence of temperature and improve performance stability.

[0009] To achieve the above object, the present invention provides the following solution: The present invention provides a coupling system damper based on a multi-phase lattice microstructure, comprising:

[0010] Multiple vibration damping layers;

[0011] The multiphase lattice layer is arranged between adjacent vibration-damping layers. Both the vibration-damping layer and the multiphase lattice layer are made of Ti-6Al-4V alloy. The multiphase lattice layer is filled with rubber particles.

[0012] Furthermore, the multiple vibration-damping layers are an upper constraint plate, a shear plate and a lower constraint plate arranged in sequence from top to bottom, and the multiphase lattice layer is arranged between the upper constraint plate and the shear plate and between the lower constraint plate and the shear plate.

[0013] Furthermore, the Ti-6Al-4V alloy includes: Fe: 0.1%; N: 0.018%; O: 0.087%; C: 0.012%; V: 4.02%; Al: 6.04%; Y: 0.004%; H: 0.026%; Ti: balance.

[0014] Furthermore, the vibration-damping layer and the multiphase lattice layer are made of Ti-6Al-4V alloy powder, and the particle size of the Ti-6Al-4V alloy powder is 25 to 65 μm.

[0015] Furthermore, the multiphase lattice layer includes multiple lattice material layers arranged in sequence from the inside to the outside, and the multiple lattice material layers and the multiple vibration reduction layers are made of Ti-6Al-4V alloy powder by selective laser melting and printing layer by layer.

[0016] Furthermore, the multilayer lattice material layer is an octahedral lattice structure, an octahedral truss lattice structure, a rhombic dodecahedron lattice structure and an octahedral topological lattice structure arranged in sequence from the inside to the outside, and the rubber particles are respectively filled in the octahedral lattice structure, the octahedral truss lattice structure, the rhombic dodecahedron lattice structure and the octahedral topological lattice structure.

[0017] The present invention discloses the following technical effects:

[0018] 1. The shock absorber of the present application is made of an alloy, and a multiphase lattice layer is arranged in the shock absorber. The lattice structure has good mechanical properties such as high specific modulus, high specific strength and high specific surface area, as well as excellent energy absorption performance. Ti-6Al-4V alloy has excellent high specific strength, corrosion resistance and heat resistance. Compared with traditional rubber shock absorbers, the shock absorber made of Ti-6Al-4V alloy powder printed layer by layer by selective laser melting technology has better mechanical properties and stability, and can maintain good energy absorption performance in extremely cold and extremely hot environments, and can overcome the influence of temperature on vibration reduction performance.

[0019] 2. The shock absorber of the present application can be made by printing layer by layer through the selective laser melting technology, which can realize the diversification, rapidity and precision of the production of multi-phase lattice layers. At the same time, based on the intelligent characteristics of 3D printing, the required dynamic parameter target values ​​such as shock absorber stiffness and damping can be obtained by adjusting the design parameters in the software (the shape of the multi-phase lattice layer, the arrangement form, the thickness of the structural rod diameter, etc.), and then the energy absorption capacity can be further improved by filling rubber particles, so as to manufacture the target performance shock absorber, which not only simplifies the process but also greatly reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a diagram of the multiphase lattice layer structure of the present invention;

[0023] Figure 3 It is a planar layout diagram of the multi-layer lattice material layer of the present invention;

[0024] Figure 4 It is the rubber particle filling diagram of the present invention;

[0025] Figure 5 It is a schematic diagram of the rhombic dodecahedron lattice structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the octave truss lattice structure of the present invention;

[0027] Figure 7 Schematic diagram of the octahedral lattice structure of the present invention;

[0028] Figure 8 It is a schematic diagram of the octahedral topological lattice structure;

[0029] Fig. 9 is the curve of loss stiffness changing with temperature;

[0030] Among them, 1. upper constraint plate; 2. shear plate; 3. multiphase lattice layer; 4. lower constraint plate; 5. rhombic dodecahedron lattice structure; 6. octahedral truss lattice structure; 7. bolt hole; 8. octahedron lattice structure; 9. octahedron topological lattice structure; 10. rubber particles; 11. vibration reduction layer. DETAILED DESCRIPTION

[0031] 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 only 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 are within the scope of protection of the present invention.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] An embodiment of the present invention provides a coupling system vibration damper based on a multiphase lattice microstructure, comprising: a multilayer vibration damping layer 11; a multiphase lattice layer 3, wherein the multiphase lattice layer 3 is arranged between adjacent vibration damping layers 11, and the vibration damping layer 11 and the multiphase lattice layer 3 are both made of Ti-6Al-4V alloy, and the multiphase lattice layer 3 is filled with rubber particles 10.

[0034] In this embodiment, the multi-layer vibration damping layer 11 is an upper constraint plate 1, a shear plate 2 and a lower constraint plate 4 arranged in sequence from top to bottom, and the multi-phase lattice layer 3 is arranged between the upper constraint plate 1 and the shear plate 2 and between the lower constraint plate 4 and the shear plate 2. Two bolt holes 7 are arranged on the left side of the upper constraint plate 1 and the lower constraint plate 4, and two bolt holes 7 are arranged on the right side of the shear plate 2 for vibration damper installation.

[0035] In this embodiment, the Ti-6Al-4V alloy includes: Fe: 0.1%; N: 0.018%; O: 0.087%; C: 0.012%; V: 4.02%; Al: 6.04%; Y: 0.004%; H: 0.026%; Ti: balance.

[0036] In this embodiment, the vibration-damping layer 11 and the multiphase lattice layer 3 are made of Ti-6Al-4V alloy powder, and the particle size of the Ti-6Al-4V alloy powder is 25 to 65 μm.

[0037] In this embodiment, the multiphase lattice layer 3 includes multiple lattice material layers arranged in sequence from the inside to the outside, and the multiple lattice material layers and the multiple vibration reduction layers 11 are made of Ti-6Al-4V alloy powder by selective laser melting and printing layer by layer.

[0038] In this embodiment, the multilayer lattice material layer is an octahedral lattice structure 8, an octahedral truss lattice structure 6, a rhombic dodecahedron lattice structure 5 and an octahedral topological lattice structure 9 arranged in sequence from the inside to the outside, and the rubber particles 10 are filled in the octahedral lattice structure 8, the octahedral truss lattice structure 6, the rhombic dodecahedron lattice structure 5 and the octahedral topological lattice structure 9 respectively.

[0039] When the building structure is subjected to earthquake or wind load, the shear plate 2 will drive the multiphase lattice layer 3 to shear deformation, thereby exerting the damping energy dissipation characteristics of the shock absorber, absorbing and dissipating the energy transmitted to the building structure, thereby protecting the building structure. Fig. 9As shown, the change of loss stiffness of this embodiment with temperature is tested, and the test conditions are 0.1Hz, 0.5Hz, and 1.2Hz respectively. It can be seen that within the range of -40℃ to +40℃, the change of loss stiffness of the shock absorber with temperature is small, indicating that in high and low temperature environments and environments with a large temperature change span, the shock absorber disclosed in this embodiment can maintain good vibration reduction performance, and has better vibration reduction effect and stability than conventional rubber shock absorbers.

[0040] In some other embodiments, the multi-layer lattice material layer can also be other polyhedral lattice structures, truss structures, topological structures, etc. The multi-layer lattice material layer can be 2 layers, 3 layers, etc., and the upper constraint plate 1, the shear plate 2 and the lower constraint plate 4 can also be a multi-layer structure, which is not limited here.

[0041] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A coupled system shock absorber based on a multiphase lattice microstructure, characterized in that: include: A multi-layer vibration damping layer (11); A multiphase lattice layer (3), the multiphase lattice layer (3) being arranged between adjacent vibration-damping layers (11), the vibration-damping layer (11) and the multiphase lattice layer (3) both being made of a Ti-6Al-4V alloy, and the multiphase lattice layer (3) being filled with rubber particles (10); The Ti-6Al-4V alloy comprises: Fe: 0.1%; N：0.018％； O：0.087％； C：0.012％； V：4.02％； Al：6.04％； Y：0.004％； H：0.026％； Ti: margin; The vibration damping layer (11) and the multiphase lattice layer (3) are made of Ti-6Al-4V alloy powder, and the particle size of the Ti-6Al-4V alloy powder is 25 to 65 μm; the multiphase lattice layer (3) comprises a plurality of lattice material layers arranged in sequence from the inside to the outside, and the plurality of lattice material layers and the plurality of vibration damping layers (11) are made of Ti-6Al-4V alloy powder by selective laser melting and printing layer by layer; the plurality of lattice material layers are an octahedral lattice structure (8), an octahedral truss lattice structure (6), a rhombic dodecahedral lattice structure (5), and an octahedral topological lattice structure (9) arranged in sequence from the inside to the outside, and the rubber particles (10) are respectively filled in the octahedral lattice structure (8), the octahedral truss lattice structure (6), the rhombic dodecahedral lattice structure (5), and the octahedral topological lattice structure (9).

2. The coupled system vibration absorber based on multiphase lattice microstructure according to claim 1, characterized in that: The multiple vibration-damping layers (11) are an upper constraint plate (1), a shear plate (2) and a lower constraint plate (4) arranged in sequence from top to bottom, and the multiphase lattice layer (3) is arranged between the upper constraint plate (1) and the shear plate (2) and between the lower constraint plate (4) and the shear plate (2).

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