Anti-wear and erosion design method with biomimetic desert biological structure and impeller and blade

Abstract

The application discloses a kind of anti-wear and loss design method and impeller and blade with bionic desert biological structure.The anti-wear and loss blade with bionic desert biological structure includes blade body and bionic component, the blade body has pressure surface;The number of the bionic component is multiple, multiple the bionic component is arranged on the pressure surface, the bionic component includes convex part and recessed part, the recessed part is surrounded in the circumferential direction of the convex part, the convex part is convex to the pressure surface, and the recessed part is concave to the pressure surface.The anti-wear and loss blade with bionic desert biological structure of the embodiment of the application can form synergistic effect by deflecting particle trajectory through convex part, dissipating impact kinetic energy through recessed part, inducing turbulent flow drag reduction, so as to significantly reduce the wear effect of particles on the blade, and the manufacturing process is simple, the manufacturing cost is controllable, and the universality is good.

Description

Technical Field

[0001] This invention belongs to the field of fluid machinery technology, specifically relating to a wear-resistant and damage-reducing design method with a biomimetic desert biological structure, as well as an impeller and blades. Background Technology

[0002] When centrifugal pump impeller blades are transporting sandy water, they are prone to severe wear due to the impact and friction of solid particles, affecting the pump's efficiency and lifespan. Related technologies, such as optimized hydraulic design, selection of wear-resistant materials, and application of surface coatings, suffer from high costs, complex processes, and limited effectiveness. Summary of the Invention

[0003] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0004] The inventors recognized that biomimicry offers new insights into wear resistance and damage reduction. Desert creatures such as scorpions, lizards, and tamarisk have surface structures that exhibit excellent resistance to wind and sand erosion, providing ideas for the wear-resistant design of impeller blades. However, biomimicry research in related technologies has largely focused on drag reduction design, with insufficient exploration of wear-resistant biomimetic structures, and a lack of multi-feature fusion and engineering application verification.

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of the present invention propose a wear-resistant and damage-reducing blade with a biomimetic desert biological structure that has good wear resistance, simple process and low cost.

[0007] Embodiments of the present invention also propose a wear-resistant and damage-reducing design method with a biomimetic desert biological structure.

[0008] An embodiment of the present invention provides another type of impeller.

[0009] The wear-resistant and damage-reducing blade with a biomimetic desert biological structure according to an embodiment of the present invention includes:

[0010] The blade body has a pressure surface;

[0011] A biomimetic component, wherein there are multiple biomimetic components, which are spaced apart on the pressure surface. Each biomimetic component includes a protrusion and a recess, the recess surrounding the circumference of the protrusion, the protrusion protruding outward from the pressure surface, and the recess recessing inward from the pressure surface.

[0012] The wear-resistant and damage-reducing blade with a biomimetic desert biological structure in this invention deflects the trajectory of particles through the protrusions and dissipates the impact kinetic energy through the depressions, thereby inducing turbulence and reducing drag. This can form a synergistic effect, significantly reducing the wear effect of particles on the blade. The manufacturing process is simple, the manufacturing cost is controllable, and it has good versatility.

[0013] In some embodiments, the protrusions and recesses are arranged in a concentric ring, and the cross-section of the recesses is V-shaped.

[0014] In some embodiments, the height dimension H of the protrusion in the axial direction of the biomimetic component is 0.2 mm to 0.4 mm, and the depth dimension S of the recess is 0.05 mm to 0.15 mm.

[0015] In some embodiments, the outer edge of the protrusion and the inner edge of the recess are smoothly connected;

[0016] In the radial direction of the biomimetic component, the distance G between the low point of the recess and the high point of the protrusion is 0.8 mm to 1.2 mm.

[0017] In some embodiments, the distance between the lowest point of the recess and the outer edge and the inner edge of the recess are equal and both are B, and B = S.

[0018] In some embodiments, the biomimetic component has a contour curve that rotates around the axis of the biomimetic component to form the contour surface of the protrusions and recesses of the biomimetic component.

[0019] The contour curve includes a first curve and a second curve connected together, with the axis of the bionic component as the z-axis and the radial line of the bionic component as the x-axis. The first curve satisfies:

[0020] z = H·e -λx (0≤x≤G)

[0021] The second curve satisfies:

[0022] z = x - (G + S) (G ≤ x ≤ G + S)

[0023] Wherein, the attenuation coefficient λ = 0.02 mm -1 .

[0024] In some embodiments, the plurality of biomimetic components are arranged in a rectangular array, the spacing between two adjacent biomimetic components is 2.5 mm to 3.0 mm, and the spacing between two adjacent biomimetic components in the length direction of the blade body is greater than or equal to the spacing between two adjacent biomimetic components in the width direction of the blade body.

[0025] And / or, the pressure surface has a first region adjacent to the outlet of the blade body, and a plurality of the biomimetic components are disposed on the first region, the first region covering at least 40% of the total area of ​​the pressure surface.

[0026] The wear-resistant and damage-reducing design method with a biomimetic desert biological structure according to embodiments of the present invention is used for processing the wear-resistant and damage-reducing blade with a biomimetic desert biological structure as described in any of the above embodiments. The wear-resistant and damage-reducing design method with a biomimetic desert biological structure includes:

[0027] A substrate of a predetermined thickness is added at the pressure surface outlet of the blade body;

[0028] The protrusions and recesses are engraved in the area covered by the substrate to form the biomimetic parts, until the engraving of all the biomimetic parts is completed;

[0029] The area on the blade body where the biomimetic components are arranged is polished.

[0030] In some embodiments, in the step of engraving protrusions and depressions in the substrate coverage area to form the biomimetic component, a pulsed fiber laser with a wavelength of 1064 nm is used for layer engraving, and the focal position of the engraving process is dynamically adjusted by an online detection system.

[0031] And / or, in the step of polishing the area on the blade body where the biomimetic component is arranged, a micron-level polishing process is used for polishing.

[0032] The impeller of this invention includes blades, wherein the blades are wear-resistant and damage-reducing blades with a biomimetic desert biological structure as described in any of the above embodiments. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of an anti-wear and wear-reducing blade with a biomimetic desert biological structure according to an embodiment of the present invention.

[0034] Figure 2 This is a cross-sectional schematic diagram of the biomimetic component in the wear-resistant and damage-reducing blade with a biomimetic desert biological structure according to an embodiment of the present invention.

[0035] Figure 3 This is a schematic diagram of the contour curve of the biomimetic component in the wear-resistant and damage-reducing blade with a biomimetic desert biological structure according to an embodiment of the present invention.

[0036] Figure 4 This is a three-dimensional schematic diagram of the impeller according to an embodiment of the present invention.

[0037] Figure 5 This is a side view of the impeller according to an embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the wear of a prototype blade in a related technology.

[0039] Figure 7 This is a wear diagram of a wear-resistant and damage-reducing blade with a biomimetic desert biological structure, according to an embodiment of the present invention.

[0040] Figure label:

[0041] 100. Abrasion-resistant and damage-reducing blades with a biomimetic desert biological structure;

[0042] 1. Blade body; 11. Pressure surface;

[0043] 2. Bionic components; 21. Protrusions; 22. Recesses;

[0044] 3. Contour curve; 31. First curve; 32. Second curve;

[0045] 200. Impeller. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0047] The following describes an embodiment of the present invention: an abrasion-resistant and wear-reducing blade 100 with a biomimetic desert biological structure.

[0048] See Figures 1 to 5 The wear-resistant and damage-reducing blade 100 with a biomimetic desert biological structure in this embodiment of the invention includes a blade body 1 and a biomimetic component 2.

[0049] The blade body 1 has a pressure surface 11. When fluid flows through the blade, the side of the blade that is subjected to pressure is the pressure surface 11, which can also be understood as the convex surface of the blade.

[0050] Multiple biomimetic components 2 are arranged at intervals on the pressure surface 11. For example, multiple biomimetic components 2 are arranged on the pressure surface 11 near the outlet of the blade body 1. The biomimetic components 2 can be arranged in an array on the pressure surface 11 of the blade body 1, and located in the surface area of ​​the pressure surface 11 near the outlet of the blade body 1. The coverage area of ​​the biomimetic components 2 is determined according to the wear degree of the centrifugal pump impeller blades, thereby improving the wear performance of the pressure surface 11 of the blade body 1.

[0051] This embodiment focuses on protecting areas of high wear, such as the blade tip and trailing edge. As the particle size of sediment in the river changes, the areas of high wear change, and the coverage position of the bionic component 2 can be adjusted accordingly based on these areas.

[0052] The biomimetic component 2 in this embodiment includes a protrusion 21 and a recess 22. The recess 22 surrounds the circumference of the protrusion 21. The protrusion 21 protrudes outward from the pressure surface 11, and the recess 22 is recessed inward from the pressure surface 11. The protrusion 21 can form a biomimetic structure resembling the scales of a desert scorpion, which can deflect the particle trajectory. The recess 22 can form a biomimetic structure resembling the pits of a lizard's intersegmental membrane and the V-shaped grooves of a tamarisk tree. The recess 22 induces microscale eddies, which can dissipate impact kinetic energy and reduce the continuous contact time between the particle walls through turbulent disturbance. The synergistic effect of the protrusion 21 and the recess 22 in this embodiment can significantly reduce the wear effect of particles on the blades. Furthermore, the overall manufacturing process is simple and the manufacturing cost is controllable. Compared with anti-wear coating technologies in related technologies, it does not require high-temperature treatment and complex coating processes, thus reducing process costs. This embodiment can also be applied to impeller blades of different types and sizes, exhibiting good versatility.

[0053] The following describes some specific embodiments of the wear-resistant and damage-reducing blades with biomimetic desert biological structures according to the present invention.

[0054] See Figures 1 to 5 A wear-resistant and damage-reducing blade 100 with a biomimetic desert biological structure includes a blade body 1 and a biomimetic component 2.

[0055] The blade body 1 has a pressure surface 11. When fluid flows through the blade, the side of the blade that is subjected to pressure is the pressure surface 11, which can also be understood as the convex surface of the blade.

[0056] There are multiple biomimetic components 2, which are spaced apart on the pressure surface 11 and adjacent to the outlet of the blade body 1. The biomimetic components 2 can be arranged in an array on the pressure surface 11 of the blade body 1 and located on the surface area of ​​the pressure surface 11 near the outlet of the blade body 1.

[0057] Specifically, the pressure surface 11 has a first region adjacent to the outlet of the blade body 1, and multiple biomimetic components 2 are disposed on the first region, the coverage of which occupies at least 40% of the total area of ​​the pressure surface 11. For example, the first region occupies 40%, 45%, 46%, 48.5%, 50%, or 53% of the total area of ​​the pressure surface 11. The coverage of the biomimetic components 2 can be determined according to the wear degree of the centrifugal pump impeller blades, thereby improving the wear performance of the pressure surface 11 of the blade body 1.

[0058] The biomimetic component 2 in this embodiment includes a protrusion 21 and a recess 22. The recess 22 surrounds the circumference of the protrusion 21. The protrusion 21 protrudes outward from the pressure surface 11, and the recess 22 is recessed inward from the pressure surface 11. The protrusion 21 can form a biomimetic structure resembling the scales of a desert scorpion, which can deflect the trajectory of particles. The recess 22 can form a biomimetic structure resembling the pits of a lizard's intersegmental membrane and the V-shaped grooves of a tamarisk tree, which can dissipate impact kinetic energy and induce turbulence to reduce drag. The synergistic effect of the protrusion 21 and the recess 22 in this embodiment can significantly reduce the wear effect of particles on the blades. Furthermore, the overall manufacturing process is simple and the manufacturing cost is controllable. Compared with anti-wear coating technologies in related technologies, it does not require high-temperature treatment and complex coating processes, thus reducing process costs. This embodiment can also be applied to impeller blades of different types and sizes, exhibiting good versatility.

[0059] Specifically, the protrusion 21 and the recess 22 are arranged in a concentric ring, the cross-section of the recess 22 is approximately V-shaped, and the outer edge of the protrusion 21 and the inner edge of the recess 22 are smoothly connected.

[0060] Along the axial direction of bionic component 2 ( Figure 2 In the z-direction (i.e., the thickness direction of the blade body 1), the height H of the protrusion 21 is 0.2 mm to 0.4 mm, and the depth S of the recess 22 is 0.05 mm to 0.15 mm. In the radial direction of the biomimetic component 2 (…), Figure 2 The distance G between the low point of the recess 22 and the high point of the protrusion 21 is 0.8 mm to 1.2 mm (the direction of x upward, which is orthogonal to the thickness direction of the blade body 1).

[0061] In other words, the protrusion 21 protrudes from the pressure surface 11 of the blade body 1 by a height of 0.2 mm to 0.4 mm, and the recess 22 is recessed inwards towards the blade body 1. The distance between the lowest point of the recess 22 and the pressure surface 11 of the blade body 1 is 0.05 mm to 0.15 mm. The highest point of the protrusion 21 is located approximately at the center of the annular recess 22, and the radius of the annulus containing the lowest point of the recess 22 is 0.8 mm to 1.2 mm.

[0062] For example, the height H of the protrusion 21 is 0.3 mm, and the depth S of the recess 22 is 0.1 mm. The distance G between the lowest point of the recess 22 and the highest point of the protrusion 21 is 1 mm.

[0063] Furthermore, the distance between the lowest point of the recess 22 and the outer edge and inner edge of the recess 22 are equal and both are B, and B = S.

[0064] Multiple biomimetic components 2 are arranged in a rectangular array. The spacing between two adjacent biomimetic components 2 is 2.5 mm to 3.0 mm. The spacing between two adjacent biomimetic components 2 along the length direction of the blade body 1 is greater than or equal to the spacing between two adjacent biomimetic components 2 along the width direction of the blade body 1. For example, the spacing L1 between two adjacent biomimetic components 2 along the length direction of the blade body 1 is 3 mm, and the spacing L2 between two adjacent biomimetic components 2 along the width direction of the blade body 1 is 2.5 mm.

[0065] like Figure 2 and Figure 3 As shown, the bionic component 2 has a contour curve 3, which rotates around the axis of the bionic component 2 to form the contour surface of the protrusion 21 and the recess 22 of the bionic component 2.

[0066] The contour curve 3 includes a first curve 31 and a second curve 32 connected to each other. The structure between the high point of the protrusion 21 of the bionic component 2 and the low point of the recess 22 is formed by the first curve 31 rotating around the axis of the bionic component 2. The structure between the low point of the recess 22 of the bionic component 2 and the circumferential outer edge of the bionic component 2 is formed by the second curve 32 rotating around the axis of the bionic component 2.

[0067] With the axis of bionic component 2 as the z-axis and the radial line of bionic component 2 as the x-axis, the first curve 31 satisfies: z = H·e -λx (0≤x≤G), thus making the height gradient of the protrusion 21 and the recess 22 on the side adjacent to the protrusion 21 follow an exponential decay law and satisfy the above formula.

[0068] The second curve 32 satisfies: z = x - (G + S) (G ≤ x ≤ G + S), thus defining the geometry of the side of the recess 22 away from the protrusion 21.

[0069] Wherein, the attenuation coefficient λ = 0.02 mm -1 . Figure 3 In the diagram, the coordinates of the end of the first curve 31 furthest from the second curve 32 are (x = 0, z = H). The coordinates of the intersection point of the first curve 31 and the second curve 32 are (x = G, z = -S), and the coordinates of the end of the second curve 32 furthest from the first curve 31 are (x = G + S, z = 0).

[0070] The wear-resistant and damage-reducing design method with a biomimetic desert biological structure according to embodiments of the present invention is used for processing wear-resistant and damage-reducing blades with a biomimetic desert biological structure according to any of the above embodiments. The wear-resistant and damage-reducing design method with a biomimetic desert biological structure includes:

[0071] S101, Add a substrate of a preset thickness at the outlet of the pressure surface 11 of the blade body 1; the additive material can be a 0.3mm thick stainless steel substrate, providing a margin for subsequent subtractive processing.

[0072] S102. Engraving protrusions 21 and recesses 22 in the substrate coverage area to form biomimetic parts 2, until all biomimetic parts 2 are engraved. Specifically, a pulsed fiber laser with a wavelength of 1064nm can be used for layer-by-layer engraving. By removing material layer by layer, the protrusions 21 and recesses 22 are precisely formed step by step. The focal position of the engraving process is dynamically adjusted by an online detection system, and the processing error can be controlled within 3%.

[0073] S103. The area on the blade body 1 where the bionic component 2 is arranged is polished using a micron-level polishing process to eliminate the problem of surface unevenness caused by thermal effects, ensure the continuity of curvature in the transition zone, and ensure that the edges of the bionic component 2 are smooth and free from stress concentration.

[0074] The impeller 200 of this invention includes blades, wherein the blades are wear-resistant and damage-reducing blades 100 with a biomimetic desert biological structure according to any of the above embodiments. This invention can be applied to centrifugal pump impellers of different types and sizes, exhibiting good versatility.

[0075] The beneficial effects achieved by the impeller in this embodiment of the invention are the same as those achieved by the wear-resistant and damage-reducing blades with biomimetic desert biological structures in the above embodiments, and therefore will not be repeated.

[0076] like Figure 6 and Figure 7 As shown, this embodiment also provides a centrifugal pump sediment abrasion test. The centrifugal pump sediment abrasion test was conducted under solid-liquid two-phase flow conditions with a particle size of 4 mm and a volume concentration of 0.2%. The centrifugal pump operated at its design flow rate, with a pump speed of 1450 r / min and a design flow rate of 22.5 m³ / min. 3 / s, with a designed head of 7.5m, and wear tests were conducted on the prototype impeller and the biomimetic impeller for 14.5h respectively.

[0077] Specifically, before the wear test of the prototype impeller and the bionic impeller, a coating of equal thickness needs to be sprayed. After the wear test, the wear area is quantitatively analyzed by image processing technology to compare the wear area of ​​the prototype blade and the bionic blade.

[0078] The results of the prototype blade wear test are as follows: Figure 6 As shown, the biomimetic blade wear test results of this embodiment of the invention are as follows: Figure 7 As shown, the prototype blade exhibits continuous band-like wear on the trailing edge of the pressure surface, while the bionic blade's wear is concentrated in the convex region, showing a discrete point-like distribution; the average wear area of ​​the bionic blade is 0.343 cm². 20.375cm compared to the prototype leaf 2 A decrease of 8.58%.

[0079] Analysis of the particle collision results reveals that the biomimetic component in this embodiment of the invention, through an array of protrusions, deflects the particle trajectory via geometric interference. The recessed portion induces microscale eddies to dissipate impact kinetic energy, and turbulent disturbances reduce the continuous contact time between the particles and the wall surface, thereby improving the blade's wear resistance.

[0080] This invention integrates the surface structure features of desert scorpions, lizards, and tamarisk trees to design and process impeller blades with excellent wear resistance and damage reduction properties. It effectively solves the problems of severe impeller blade wear, high cost and limited effectiveness of wear resistance and damage reduction technologies in related technologies, and provides an efficient and reliable biomimetic solution for wear resistance and damage reduction of centrifugal pumps.

[0081] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0083] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0085] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A wear-resistant and damage-reducing blade with a biomimetic desert biological structure, characterized in that, include: The blade body has a pressure surface; A biomimetic component, wherein there are multiple biomimetic components, which are spaced apart on the pressure surface. Each biomimetic component includes a protrusion and a recess, the recess surrounding the circumference of the protrusion, the protrusion protruding outward from the pressure surface, and the recess recessing inward from the pressure surface. The biomimetic component has a contour curve, which rotates around the axis of the biomimetic component to form the contour surface of the protrusion and the recess of the biomimetic component. The contour curve includes a first curve and a second curve connected together, constructed with the axis of the biomimetic component as... The axis is constructed with the radial aspect of the biomimetic component as... The axis, the first curve satisfies: The second curve satisfies: Among them, attenuation coefficient H is the height of the protrusion, S is the depth of the recess, and G is the distance between the low point of the recess and the high point of the protrusion.

2. The wear-resistant and damage-reducing blade with a biomimetic desert biological structure according to claim 1, characterized in that, The protrusions and recesses are arranged in a concentric ring, and the cross-section of the recesses is V-shaped.

3. The wear-resistant and damage-reducing blade with a biomimetic desert biological structure according to claim 2, characterized in that, Along the axial direction of the biomimetic component, the height dimension H of the protrusion is 0.2 mm to 0.4 mm, and the depth dimension S of the recess is 0.05 mm to 0.15 mm.

4. The wear-resistant and damage-reducing blade with a biomimetic desert biological structure according to claim 3, characterized in that, The outer edge of the protrusion and the inner edge of the recess are smoothly connected; In the radial direction of the biomimetic component, the distance G between the low point of the recess and the high point of the protrusion is 0.8 mm to 1.2 mm.

5. The wear-resistant and damage-reducing blade with a biomimetic desert biological structure according to claim 4, characterized in that, The distance between the lowest point of the recess and the outer edge and the inner edge of the recess is equal and both are B, and B=S.

6. The wear-resistant and damage-reducing blade with a biomimetic desert biological structure according to any one of claims 1 to 5, characterized in that, The multiple biomimetic components are arranged in a rectangular array, with a spacing of 2.5 mm to 3.0 mm between two adjacent biomimetic components. The spacing between two adjacent biomimetic components in the length direction of the blade body is greater than or equal to the spacing between two adjacent biomimetic components in the width direction of the blade body. And / or, the pressure surface has a first region adjacent to the outlet of the blade body, and a plurality of the biomimetic components are disposed on the first region, the first region covering at least 40% of the total area of ​​the pressure surface.

7. A wear-resistant and damage-reducing design method with a biomimetic desert biological structure, characterized in that, The processing of wear-resistant and damage-reducing blades with biomimetic desert biological structures as described in any one of claims 1 to 6, wherein the wear-resistant and damage-reducing design method with biomimetic desert biological structures comprises: A substrate of a predetermined thickness is added at the pressure surface outlet of the blade body; The protrusions and recesses are engraved in the area covered by the substrate to form the biomimetic parts, until the engraving of all the biomimetic parts is completed; The area on the blade body where the biomimetic components are arranged is polished.

8. The wear-resistant and damage-reducing design method with a biomimetic desert biological structure according to claim 7, characterized in that, In the step of engraving protrusions and depressions in the substrate coverage area to form the biomimetic component, a pulsed fiber laser with a wavelength of 1064nm is used for layer engraving, and the focal position of the engraving process is dynamically adjusted by an online detection system. And / or, in the step of polishing the area on the blade body where the biomimetic component is arranged, a micron-level polishing process is used for polishing.

9. An impeller, characterized in that, Includes blades, said blades being wear-resistant and damage-reducing blades with a biomimetic desert biological structure according to any one of claims 1 to 6.

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