• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present disclosure discloses an erosive wear-resistant bionic microstructure surface and unit. The erosive wear-resistant bionic microstructure surface simulates structural features of surface scales of a desert lizard and is formed by continuously arranging identical bionic microstructure units towards the same direction. Each bionic microstructure unit is a heptahedron, a bottom surface of the bionic microstructure unit is regular hexagon while a top surface is a hexagon, overlaps the bottom surface at one edge and has five side surfaces perpendicular to the bottom surface. An included angle between the top surface and the bottom surface is an incident flow angle. Bionic microstructures of the same column are closely connected end to end, and the bionic microstructures of two adjacent columns are closely connected and staggered from each other by half. The present disclosure can change a two-phase flow state of a surface of a material, weaken the wear effect of solid particles on the surface of the material and improve the erosive wear resistance, and has simple structure and low cost.
    公开号:NL2029544A
    申请号:NL2029544
    申请日:2021-10-28
    公开日:2022-02-04
    发明作者:Dong Jing；Xue Longjian；Qian Zhongdong
    申请人:Univ Wuhan；
    IPC主号:
    专利说明:

    [01] [01] The present disclosure belongs to the field of microstructure surfaces, and specifically relates to an erosive wear-resistant bionic microstructure surface and unit.BACKGROUND ART
    [02] [02] Erosive wear refers to a phenomenon in which solid particles carried by fluid impact the surface of a material at a certain angle and speed, causing the material to be lost from the surface. When equipment runs in a gas-solid or liquid-solid two-phase flow, its parts are inevitably damaged by the erosive wear of the solid particles. The erosive wear will not only cause the deformation and failure of the parts, ending up with economic losses, but also cause a safety accident, ending up with casualties.
    [03] [03] Biomimetic researchers have found that there is almost no damage to the surfaces of organisms living in a sandy environment. The surfaces of these organisms all have a non-smooth surface structure, which provides a new idea for anti-wear researches. Existing studies provide a bionic feature structure with certain anti-wear properties, such as a V-shaped groove, a convex hull, a recess and a stripe, based on the characteristics of the surface structure of the desert scorpion. However, these studies are only limited to parameter optimization of the above-mentioned single feature structure or a simple combination of a plurality of feature structures.SUMMARY
    [04] [04] The present disclosure aims to provide an erosive wear-resistant bionic microstructure surface and unit, which simulate structural features of surface scales of desert lizards, so that a two-phase flowing state of a surface of a material can be changed, the wear effect of solid particles on the surface of the material 1s weakened, the erosive wear resistance is improved, and the erosive wear-resistant bionic microstructure surface is simple in structure and low in cost.
    [05] [05] The technical solutions adopted by the present disclosure are as follows.
    [06] [06] An erosive wear-resistant bionic microstructure surface simulates structural features of surface scales of a desert lizard and is formed by continuously arranging identical bionic microstructure units towards the same direction. Each bionic microstructure unit is a heptahedron; a bottom surface of the bionic microstructure unit is regular hexagon while a top surface is a hexagon, overlaps the bottom surface at one edge and has five side surfaces perpendicular to the bottom surface. An included angle between the top surface and the bottom surface is an incident flow angle. Bionic microstructures of the same column are closely connected end to end, and the bionic microstructures of two adjacent columns are closely connected and staggered from each other by half.
    [07] [07] Further, an edge length of the bottom surface of the bionic microstructure unit is 0.4 to 1.5 mm, and the incident flow angle is 12 to 29 degrees.
    [08] [08] Preferably, the edge length of the bottom surface of the bionic microstructure unit is 0.56 mm, and the incident flow angle is 19 degrees.
    [09] [09] An erosive wear-resistant bionic microstructure unit is of a heptahedron shape, a bottom surface of which is regular hexagon while a top surface of which is a hexagon, overlaps the bottom surface at one edge and has five side surfaces perpendicular to the bottom surface. An included angle between the top surface and the bottom surface is an incident flow angle.
    [10] [10] Further, an edge length of the bottom surface is 0.4 to 1.5 mm, and the incident flow angle is 12 to 29 degrees.
    [11] [11] Preferably, the edge length of the bottom surface is 0.56 mm, and the incident flow angle is 19 degrees.
    [12] [12] The present disclosure has the beneficial effects.
    [13] [13] The present disclosure simulates perfect impact wear-resistant scales on the surface of the desert lizard. By comprehensive considering of sizes, shapes and distribution features of the scales, the erosive wear-resistant bionic microstructure surface is formed by arranging the erosive wear-resistant bionic microstructure units, so that the structure is simple and the cost is low. Bionic microstructures of the same column are closely connected end to end, and the bionic microstructures of two adjacent columns are closely connected and staggered from each other by half, so that the basic feature of continuous distribution of the surface scales of the desert lizard is restored, and the result of natural selection is fully respected. Furthermore, the bionic microstructure units are surrounded by other bionic microstructure units, so that all coverage of the surface of the material is realized. The point is that the staggering arrangement forms a stable vortex structure. Under the impact of solid particles with different shapes and sizes, the vortex structure enables the particles to be away from the surface of the material, so that a two-phase flowing state of the surface of the material 1s changed, the wear type of the particles on the surface of the material is changed, the wear effect of the solid particles on the surface of the material is weakened, and the erosive wear resistance is improved.BRIEF DESCRIPTION OF THE DRAWINGS
    [14] [14] FIG. 1 is a schematic diagram of an erosive wear-resistant bionic microstructure surface in the embodiments of the present disclosure.
    [15] [15] FIG. 21s a front view of FIG. 1.
    [16] [16] FIG. 3 is aside view of FIG. 1.
    [17] [17] FIG. 41s a top view of FIG. 1.
    [18] [18] FIG. 5 is a schematic diagram of a bionic microstructure unit in the embodiments of the present disclosure.
    [19] [19] FIG. 61s a front view of FIG. 5.
    [20] [20] FIG. 71s a side view of FIG. 5.
    [21] [21] FIG. 8is a top view of FIG. 5.DETAILED DESCRIPTION OF THE EMBODIMENTS
    [22] [22] The present disclosure is further described below in combination with the accompanying drawings and embodiments.
    [23] [23] The design idea of the present disclosure is from the structural features of back surface scales of a desert lizard. A high-precision laser profiler is used to restore a three-dimensional structure of the scales of the desert lizard for feature analysis, and a wear resistant mechanism of the scales of the lizard is studied. A design method for an erosive wear-resistant bionic microstructure surface is provided based on the wear resistant mechanism of the scales of the lizard.
    [24] [24] As shown in FIG. 1 to FIG. 8, an erosive wear-resistant bionic microstructure surface simulates structural features of surface scales of a desert lizard and is formed by continuously arranging identical bionic microstructure units towards the same direction. Each bionic microstructure unit is a heptahedron; a bottom surface ABCDEF of the bionic microstructure unit is regular hexagon and is used as a contact surface with a surface of a material. A top surface AGHIJF of the bionic microstructure unit is a hexagon and overlaps the bottom surface at the edge AF. An included angle B between the top surface and the bottom surface is an incident flow angle. Five side surfaces of the bionic microstructure unit including two right triangles ABG, EFJ and three quadrangles BCHG, CDIH, DEJI, are all perpendicular to the bottom surface. Bionic microstructures of the same column are closely connected end to end, and the bionic microstructures of two adjacent columns are closely connected and staggered from each other by half.
    [25] [25] The size of each bionic microstructure unit is determined by an edge length of the bottom surface and an incident flow angle. The edge length of the bottom surface of the bionic microstructure unit has a selection range of 0.4 to 1.5 mm. In the present embodiment, the edge length of the regular hexagon is 0.56 mm. The incident flow angle of the bionic microstructure unit is 12 to 29 degrees. In the present embodiment, the incident flow angle is equal to 19 degrees.
    [26] [26] The present disclosure simulates perfect impact wear-resistant scales on the surface of the desert lizard. By comprehensive considering of sizes, shapes and distribution features of the scales, the erosive wear-resistant bionic microstructure surface is formed by arranging the erosive wear-resistant bionic microstructure units, so that the structure is simple and the cost is low. Bionic microstructures of the same column are closely connected end to end, and the bionic microstructures of two adjacent columns are closely connected and staggered from each other by half, so that 5 the basic feature of continuous distribution of the surface scales of the desert lizard is restored, and the result of natural selection is fully respected. Furthermore, the bionic microstructure units are surrounded by other bionic microstructure units, so that all coverage of the surface of the material 1s realized. The point is that the staggering arrangement forms a stable vortex structure. Under the impact of solid particles with different shapes and sizes, the vortex structure enables the particles to be away from the surface of the material, so that a two-phase flowing state of the surface of the material is changed, the wear type of the particles on the surface of the maternal is changed, the wear effect of the solid particles on the surface of the material is weakened, and the erosive wear resistance is improved.
    [27] [27] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above illustrations, and all these improvements and transformations shall fall within the protection scope of the claims appended.
    权利要求:
    Claims (6)
    [1]
    -6- Conclusions l. Erosion-resistant bionic microstructure surface, which simulates structural features of desert lizard surface scales and is formed by continuously arranging identical bionic microstructure units in the same direction, each bionic microstructure unit being a heptad; a lower surface of the bionic microstructure unit is a regular hexagon while an upper surface which is a hexagon overlaps the lower surface on one side, and has five side surfaces perpendicular to the lower surface, an included angle between the upper surface and the lower surface is an angle of incident flow; and bionic microstructures of the same column are closely connected at the ends and the bionic microstructures of two adjacent columns are closely connected and semi-displaced from each other.
    [2]
    The erosion resistant bionic microstructure surface according to claim 1, wherein an edge length of the lower surface of the bionic microstructure unit is 0.4 - 1.5 mm, and the angle of incident flow is 12 - 29 degrees.
    [3]
    The erosion-resistant bionic microstructure surface according to claim 2, wherein the edge length of the lower surface of the bionic microstructure unit is 0.56 mm, and the angle of incident flow is 19 degrees.
    [4]
    4. Erosion-resistant bionic microstructure unit of the shape of a heptad, of which a lower surface is a regular hexagon while an upper surface which is a hexagon overlaps the lower surface at one edge and has five side surfaces perpendicular to the lower surface, with an included angle between the upper surface and the lower surface is an angle of incident flow.
    [5]
    The erosion-resistant bionic microstructure unit according to claim 4, wherein an edge length of the lower surface of the bionic microstructure unit is 0.4 - 1.5 mm, and the angle of incident flow is 12 - 29 degrees.
    -7-
    [6]
    The erosion-resistant bionic microstructure unit according to claim 5, wherein the edge length of the lower surface of the bionic microstructure unit is 0.56 mm, and the angle of incident flow is 19 degrees
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    同族专利:
    公开号 | 公开日
    CN112283570B|2021-08-24|
    CN112283570A|2021-01-29|
    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CN202011184926.2A|CN112283570B|2020-10-29|2020-10-29|Erosion and wear resistant biomimetic microstructure surface and unit|
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