A curved surface bionic resistance-reducing share plough based on the structure of the rhombic scale of the pangolin

Abstract

The present application relates to a kind of based on Manis cornuta ridge type scale structure curved surface bionic resistance-reducing share plough, including plough share, plough chest connected with plough share and plough wall connected with plough chest, the upper surface of plough chest and plough wall constitutes first contact surface, first contact surface is all equipped with multiple bionic scale, bionic scale includes second contact surface, second contact surface is formed by bionic curve along guide line track rotation, the equation of the curve of this guide line is: y1=10sin (0.08x1), the value range of x1 is 0mm~40mm, the equation of the curve of bionic curve is: y2=10cos (0.04x2), the value range of x2 is 0mm~40mm.The present application based on Manis cornuta ridge type scale structure curved surface bionic resistance-reducing share plough can make horizontal ploughing resistance average reduction 8.68%, it is favorable for share plough to reduce resistance and save energy in the process of tillage.

Description

Technical Field

[0001] This invention relates to the field of agricultural tillage machinery and equipment technology, specifically to a curved biomimetic drag-reducing moldboard plow based on the pangolin prism-shaped scale structure. Background Technology

[0002] Soil tillage improves soil structure, loosens compacted soil, and forms good aggregate structure, facilitating crop absorption of more water and nutrients; it also helps eliminate weeds and pests; and improves soil aeration and the crop growing environment. The moldboard plow is a mobile soil working component, working on soils with complex environments and characteristics. The energy consumed by the moldboard plow to overcome adhesion and friction with the soil accounts for 30% to 50% of the total energy consumption in agricultural production. Currently, 80% of my country's arable land is tilled by moldboard plows. Optimizing the structure and shape of the moldboard plow's tillage components to reduce tillage resistance would be of great significance to the economic development of my country and the world.

[0003] The resistance experienced by the plowshare mainly consists of the normal pressure exerted by the soil on the plowshare's curved surface and the resulting friction, adhesion, and cutting resistance of the plowshare blades on the soil. Among these, the sliding resistance between the soil and the plow surface accounts for 25% to 28% of the total resistance of cultivated land. Therefore, the shape of the plowshare's curved surface has a significant impact on the resistance of the moldboard plow, and reasonably modifying the moldboard plow's curved surface can reduce the plow's tillage resistance.

[0004] Research has found that pangolin scales help them dig and widen burrows, mainly due to the prismatic structure of their scales. Furthermore, the geometrically non-smooth surface of the scales provides significant drag reduction during movement. Therefore, applying the prismatic scale structure of pangolins to the design of the curved surface of a plowshare has a strong theoretical basis. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a curved biomimetic moldboard plow based on a pangolin-patterned scale structure to reduce plowing resistance and lower plowing power consumption.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: a curved biomimetic drag-reducing plowshare based on the pangolin prism-shaped scale structure, including a plowshare, a plowshare connected to the plowshare, and a plowshare wall connected to the plowshare. The upper surfaces of the plowshare and the plowshare wall constitute a first soil-contacting curved surface. Multiple biomimetic scales are provided on the first soil-contacting curved surface. The biomimetic scales include a second soil-contacting curved surface. The second soil-contacting curved surface is formed by rotating a biomimetic curve (44) along a guide line trajectory. The curve equation of the guide line is: y1 = 10sin(0.08x1), where x1 ranges from 0mm to 40mm. The curve equation of the biomimetic curve is: y2 = 10cos(0.04x2), where x2 ranges from 0mm to 40mm.

[0007] As a preferred technical solution, a plowshare is provided on the lower surface where the plowshare and the plowshare connect.

[0008] The plowshare is located between the plowshare and the plow wall, and the plowshare is equipped with a shovel tip.

[0009] As a preferred technical solution, the plowshare includes multiple bars.

[0010] As a preferred technical solution, the biomimetic scales also include a side surface and a bottom surface, with the ratio of the height H to the width d of the side surface being 1:4.

[0011] As a preferred technical solution, the sides of the biomimetic scales are positioned away from the plowshare.

[0012] As a preferred technical solution, the biomimetic scales are evenly arranged every 25mm along a trajectory line, which is obtained by the intersection of the shank blade line parallel to the forward direction plane and the first contact surface.

[0013] Beneficial Effects: This scheme, through optimized design, utilizes a curved biomimetic moldboard plow with a pangolin-patterned scale structure to reduce soil disturbance area during plowing, thereby lowering plowing resistance and energy consumption. Discrete element simulation results show that, under normal operating conditions (300mm plowing depth, 2m / s plowing speed), using this curved biomimetic moldboard plow with a pangolin-patterned scale structure can reduce horizontal plowing resistance by an average of 8.68%. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is an axonometric view of the biomimetic scales of the present invention;

[0016] Figure 3 This is a front view of the biomimetic scales of the present invention;

[0017] Figure 4 This is a side view of the biomimetic scales of the present invention;

[0018] Figure 5 This is a bottom view of the biomimetic scales of the present invention;

[0019] Figure 6 This is a schematic diagram of the biomimetic plowshare with trajectory lines of the present invention;

[0020] Figure 7 The frontal and lateral contour curves of the pangolin's prismatic scales;

[0021] Figure 8 This is a graph showing the plowing resistance of the biomimetic drag-reducing moldboard plow of this invention and a conventional moldboard plow over time.

[0022] Attached reference numerals: 1. Plowshare, 2. Plowshare, 3. Shovel tip, 4. Bionic scale, 41. Bottom surface, 42. Side surface, 421. Bionic curve, 43. Second contact surface, 44. Guide line, 5. Plowshare chest, 6. Plowshare support, 7. Shinbone line, 8. Trajectory line. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that, in the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Please see Figure 1-8 This invention provides a curved biomimetic drag-reducing plowshare based on a pangolin-patterned scale structure, comprising a plowshare 2, a plowshare 5 connected to the plowshare 2, and a plowshare wall 1 connected to the plowshare 5. The upper surfaces of the plowshare 5 and the plowshare wall 1 form a first soil-contacting curved surface. Multiple biomimetic scales 4 are provided on the first soil-contacting curved surface. The biomimetic scales 4 include a second soil-contacting curved surface 43, which is formed by rotating a biomimetic curve 44 along a guide line 421. The curve equation of the guide line 421 is: y1 = 10sin(0.08x1), where x1 ranges from 0mm to 40mm. The curve equation of the biomimetic curve 44 is: y2 = 10cos(0.04x2), where x2 ranges from 0mm to 40mm.

[0025] The plow body of this application is a grid structure, wherein the tillage width L is 600mm, the lower surface where the plowshare 2 and the plow chest 5 are connected is provided with a plow support 6, the plow chest 5 is located between the plowshare 2 and the plow wall 1, the plowshare 2 is provided with a shovel tip 3, and the plow wall 1 includes multiple grids.

[0026] The biomimetic scale 4 also includes a side surface 42 and a bottom surface 41. The ratio of the height H to the width d of the side surface 42 is 1:4, where the height H is 10mm, the length D is 40mm, and the bottom width d is 40mm. The side surface 42 of the biomimetic scale 4 is set away from the plow wall 1. It should be noted that the parts not described in detail in this application are all prior art.

[0027] The second surface 43 that touches the ground is formed by rotating the biomimetic curve 44 along the trajectory of the guide line 421. Specifically, the outline points of the pangolin scale pattern are marked, and complex markings are optimized and removed to obtain a simplified structure. Excel software is used to perform curve fitting on the front arc-shaped outline and the side outline of the simplified structure. The curve equations obtained by the fitting are as follows:

[0028] The equation for the frontal arc profile curve is: y1 = 10sin(0.08x1), where x1 ranges from 0mm to 40mm. The equation for the lateral profile curve is: y2 = 10cos(0.04x2), where x2 ranges from 0mm to 40mm.

[0029] The frontal arc-shaped contour curve and lateral contour curve of the pangolin's prismatic scales obtained by fitting are as follows: Figure 7 As shown, the guide line 421 is made by proportionally enlarging the arc-shaped outline curve of the front of the pangolin's prismatic scales, and the biomimetic curve 44 is made by proportionally enlarging the side outline curve of the pangolin's prismatic scales. Then, the biomimetic curve 44 rotates along the trajectory of the guide line 421 to form the second ground-contacting curved surface 43. The guide line 421 has two endpoints, which are defined as the start point and the end point, respectively. The biomimetic curve 44 also has two endpoints, which are defined as the high point and the low point, respectively. When the biomimetic curve 44 rotates, the high point moves from the start point to the end point along the trajectory of the guide line 421, and the low point rotates along itself.

[0030] In this embodiment, the biomimetic scales 4 are evenly arranged every 25 mm along a trajectory line 8. This trajectory line 8 is obtained by the intersection of the shank line 7, which is parallel to the forward direction, and the first contact surface. Furthermore, a new plane is established every 45 mm, intersecting the first contact surface to obtain the distribution trajectory of the biomimetic scales. The trajectory lines obtained by the intersection of each plane and the first contact surface are as follows: Figure 6As shown, biomimetic scales 6 are evenly arranged at 25mm intervals on each trajectory line 8. The trajectory line 8 is similar to the soil trace line of the first soil contact surface and is easy to position, which can ensure that the soil contacts the second soil contact surface 43 to the maximum extent during the movement of the soil along the first soil contact surface.

[0031] Figure 5 The plowing resistance of the curved biomimetic drag-reducing moldboard plow based on the pangolin prism-shaped scale structure of this invention versus the ordinary non-biomimetic moldboard plow under normal working conditions (300mm plowing depth, 2m / s plowing speed) varies with time. Discrete element simulation results show that, compared with the ordinary non-biomimetic moldboard plow, under working conditions of 300mm plowing depth and 2m / s plowing speed, the curved biomimetic drag-reducing moldboard plow based on the pangolin prism-shaped scale structure of this invention can reduce the horizontal plowing resistance by an average of 8.68%.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A curved surface biomimetic drag-reducing moldboard plow based on the prism-patterned scale structure of a pangolin, characterized in that, The system includes a plowshare (2), a plowshare (5) connected to the plowshare (2), and a plowshare wall (1) connected to the plowshare (5). The upper surfaces of the plowshare (5) and the plowshare wall (1) form a first soil-contacting surface. Multiple biomimetic scales (4) are provided on the first soil-contacting surface. The biomimetic scales (4) include a second soil-contacting surface (43). The second soil-contacting surface (43) is formed by rotating a biomimetic curve (44) along the trajectory of a guide line (421). The curve equation of the guide line (421) is: , The range of values ​​is The equation of the biomimetic curve (44) is: The range of values ​​is ; The biomimetic scales (4) are evenly arranged every 25 mm along a trajectory line (8), which is obtained by the intersection of the shin blade line (7) parallel to the plane of the forward direction and the first contact surface.

2. The curved surface biomimetic drag-reducing plowshare based on a pangolin-patterned scale structure according to claim 1, characterized in that: The lower surface where the plowshare (2) and the plowshare (5) are connected is provided with a plow support (6).

3. The curved surface biomimetic drag-reducing plowshare based on a pangolin-patterned scale structure according to claim 1, characterized in that: The plowshare (5) is located between the plowshare (2) and the plowshare (1), and the plowshare (2) is provided with a shovel tip (3).

4. The curved biomimetic drag-reducing plowshare based on a pangolin-patterned scale structure according to claim 1, characterized in that: The plowshare (1) consists of multiple slats.

5. The curved surface biomimetic drag-reducing plowshare based on a pangolin-patterned scale structure according to claim 1, characterized in that: The biomimetic scale (4) also includes a side surface (42) and a bottom surface (41), and the ratio of the height H to the width d of the side surface (42) is 1:

4.

6. The curved biomimetic drag-reducing plowshare based on a pangolin-patterned scale structure according to claim 1, characterized in that: The side (42) of the biomimetic scale (4) is set away from the plow wall (1).

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