CN106838598A - A kind of bionical Anti-erosion surface texture - Google Patents

Abstract

The invention discloses a kind of bionical Anti-erosion surface texture, the present invention is the back feature based on desert scorpion, on engineering material surface, design has V-groove, convex closure, regular hexagon pit, can be applied to the various easy structure members by erosion to improve its anti-erosion property.V-groove distribution parallel to each other, section is equilateral triangle；Convex closure size uniformity is distributed on the ridge of V-groove；Regular hexagon pit is evenly distributed between convex closure structure.Biomimetic features of the invention be combined with each other synergy change material surface Dual-Phrase Distribution of Gas olid flow regime, reduce the number of times of solid particle impingement material surface, and the speed that material surface is clashed into the presence of the mattress of counterclockwise rotates of the solid particle inside V-groove and regular hexagon pit is substantially reduced, and then cause that the erosion rate in erosion process of the material with these micro-structurals diminishes, improve the anti-erosion property of material.

Description

A Bionic Anti-erosion Surface Structure

technical field

The invention relates to a surface structure, in particular to a bionic anti-erosion surface structure.

Background technique

Erosion wear of solids is the loss of surface quality due to the interaction between the mechanical surface and solid particles moving at a certain speed. It can cause cracks in engineering materials, reduce the durability of industrial products and cause a large number of potential safety problems, etc. To address this solid erosion wear problem, previous studies can be classified into three categories: composite materials, material modification, and surface coatings. For composite materials, it has good strength and low density compared with single metal alloys and polymers, and is widely used in aerospace erosion resistance, but the technology is difficult, the engineering cycle is long, and the cost is high; materials Modification is to improve its erosion resistance by changing the internal microstructure of the material, but limited by the mechanical properties of the material itself, the effect is limited; the surface coating includes the sprayed paint and the thickness of the coating, etc., which can reduce its corrosion resistance to a certain extent. Erosion, but the coating bonding strength is limited, easy to fall off, the manufacturing process is complicated, and the cost is high.

With the continuous deepening of bionics research, many scientific and technical problems can be inspired by the biological world. Desert scorpions live in harsh desert areas and are often eroded by wind and sand. In order to adapt to survival, they have evolved special structures on the back plate under the condition of natural selection, which include V-shaped grooves, convex hulls and regular hexagonal pit structures. These structures cooperate with each other and act synergistically, providing a natural biological blueprint for the design and manufacture of bionic anti-erosion materials.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a bionic anti-erosion surface structure.

The present invention is based on the excellent anti-erosion body surface structure of the desert scorpion, and designs V-shaped grooves, convex hulls, and regular hexagonal pit structures. These structures can change the gas on the material surface under the high-speed impact of solid particles of different sizes. The flow state of the solid two-phase flow and the reduction of the impact velocity of the solid particles can reduce the erosion rate of the material during the erosion process and improve its erosion resistance.

The design idea of the present invention is derived from the V-shaped groove, convex hull and regular hexagonal pit structure on the surface of the desert scorpion backboard. The characteristics of the microstructure of the desert scorpion back plate surface were analyzed, and the optimization design of the experiment was carried out with the goal of improving the erosion resistance of the material surface, and the design scheme of the bionic anti-erosion surface structure was determined.

In the present invention, several V-shaped grooves are opened on the surface of the engineering material, and the several V-shaped grooves are distributed in parallel. pit.

The side length a of the V-shaped groove is 4 mm, the distance b between the two edges of the V-shaped groove is 4 mm, and the cross-section of the V-shaped groove is an equilateral triangle. The width c of the ridge is 4 mm.

The convex hulls are evenly distributed on the ridges of the V-shaped grooves, the protrusion diameter d of the convex hulls is half a sphere of 1 mm, and the distance e between adjacent convex hulls is 2 mm.

The regular hexagonal pits are located between adjacent convex hulls on the V-shaped groove ridges, and the convex hulls are distributed in two rows on each ridge. Based on the ridge plane, the depth f of the regular hexagonal pits is 0.3 mm downward, and the side length g is 0.5 mm. Four rows of regular hexagonal pits are distributed on each ridge.

The invention can be applied to mechanisms or components that are susceptible to erosion and wear, so as to improve their erosion resistance and prolong their service life.

The bionic structure of the present invention can change the flow state of the gas-solid two-phase flow on the material surface, reduce the number of solid particles hitting the material surface, and reduce the falling of solid particles due to the anticlockwise rotating air cushion inside the groove The speed reduces the kinetic energy of solid particles hitting the surface of the material, thereby reducing the erosion rate of the material during the erosion of solid particles of different sizes and improving its erosion resistance.

Beneficial effects of the present invention:

The invention does not need to change the internal microstructure of the engineering material and does not need to coat the surface of the material. It only needs to set the bionic microstructure on the surface of the engineering material to improve the erosion resistance of the structure or parts. It has the advantages of simple manufacturing process and low technical difficulty. The advantages of less time-consuming and low cost.

Description of drawings

Fig. 1 is the structural representation of invention.

Fig. 2 is a partial top view of the present invention.

Fig. 3 is a schematic diagram of the convex hull structure of the present invention.

Fig. 4 is a schematic diagram of the regular hexagonal pit structure of the present invention.

detailed description

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the present invention is provided with several V-shaped grooves 1 on the surface of the engineering material, several V-shaped grooves 1 are distributed in parallel, and the ridges 11 between two adjacent V-shaped grooves 1 The widths are the same, and there are convex hulls 2 and regular hexagonal pits 3 on the ridge 11 of the V-shaped groove 1.

The side length a of the V-shaped groove 1 is 4 mm, the distance b between the two edges of the V-shaped groove 1 is 4 mm, and the cross-section of the V-shaped groove 1 is an equilateral triangle. The width c of the ridge 11 is 4 mm.

The convex hulls 2 are evenly distributed on the ridges 11 of the V-groove 1, the protrusion diameter d of the convex hulls 2 is half a sphere of 1mm, and the distance e between adjacent convex hulls 2 is 2mm.

The regular hexagonal pits 3 are located between adjacent convex hulls 2 on the ridges 11 of the V-shaped groove 1, and the convex hulls 2 are distributed in two rows on each ridge 11. Based on the plane of the ridge 11 , the depth f of the regular hexagonal pits 3 is 0.3 mm downward, and the side length g is 0.5 mm. The regular hexagonal pits 3 are distributed in four rows on each ridge 11 .

The invention can be applied to mechanisms or components that are susceptible to erosion and wear, so as to improve their erosion resistance and prolong their service life.

The bionic structure of the present invention can change the flow state of the gas-solid two-phase flow on the material surface, reduce the number of solid particles hitting the material surface, and reduce the falling of solid particles due to the anticlockwise rotating air cushion inside the groove The speed reduces the kinetic energy of solid particles hitting the surface of the material, thereby reducing the erosion rate of the material during the erosion of solid particles of different sizes and improving its erosion resistance.

Claims (2)

1. A bionic anti-erosion surface structure, characterized in that it is provided with some V-shaped grooves (1) on the surface of the engineering material, and some V-shaped grooves (1) are distributed in parallel, between two adjacent V-shaped grooves (1). The width of the ridges (11) between them is the same, and there are convex hulls (2) and regular hexagonal pits (3) on the ridges (11) of the V-shaped groove (1); the convex hulls (2) are evenly distributed in the V-shaped grooves. On the ridge (11) of (1), the regular hexagonal pit (3) is located between the adjacent convex hulls (2) on the ridge (11) of the V-shaped groove (1), and the convex hull (2) is in each ridge Two columns are distributed on (11); four columns of regular hexagonal pits (3) are distributed on each ridge (11). 2. A kind of bionic anti-erosion surface structure according to claim 1, characterized in that: The side length a of the V-shaped groove (1) is 4mm, the distance b between the two edges of the V-shaped groove (1) is 4mm, and the cross-section of the V-shaped groove (1) is an equilateral triangle; The width c of the ridge is 4mm; The protrusion diameter d of the convex hulls (2) is half a sphere of 1 mm, and the distance e between adjacent convex hulls (2) is 2 mm; The regular hexagonal pit (3) is based on the ridge (11) plane, the downward pit depth f of the regular hexagonal pit (3) is 0.3mm, and the side length g is 0.5mm.