CN102972128B - Bionic core moldboard type sowing boot - Google Patents

Abstract

The bionic coreshare type sowing ditch opener belongs to the technical field of agricultural machinery. The invention is based on the fact that the scale surface structure and the convex hull structure of the soil cave animal pangolin have the characteristics of wear resistance, viscosity reduction and resistance reduction. According to optimization analysis and geometric measurement It is determined that the upper surface of the front base of the core share is regularly distributed with scale-shaped geometric structures and convex-hull geometric structures. The convex-hull geometry is machined in one piece with the base body. The invention has good technical effects of alleviating soil adhesion and reducing working resistance, can improve the quality of sowing and fertilizing, and reduce power consumption.

Description

Bionic core conventional sowing opener

technical field

The invention belongs to the technical field of agricultural machinery, and in particular relates to a bionic coreshare type sowing ditch opener.

Background technique

In agricultural cultivation operations, it is necessary to form a ditch on the surface of the land for sowing and fertilizing. Agricultural production requires that the ditch opened by the sowing opener be neat, consistent in depth, and sow evenly. However, under different soil conditions, the furrows formed by the seeding openers are very different. When it works in the soil with high humidity, the soil adheres to its working surface, which leads to increased traction resistance, and the shape of the groove is irregular, which makes the depth of the seeds in the groove inconsistent and affects the quality of sowing. Therefore, reducing viscosity and drag is an important problem that should be solved for sowing openers.

Contents of the invention

The purpose of the present invention is to solve the problems of existing sowing and ditching parts such as clay and increased resistance, and to provide a ditch opener with the scale surface structure and convex hull structure of the soil cave animal pangolin on the surface. It is formed by designing a scale-shaped structure and a convex-hull structure on the soil-contacting surface of an ordinary coreshare type sowing opener. These two bionic structures make it possible to reduce soil adhesion and work resistance.

The present invention is composed of a core share 1, a share handle 2, a wing plate 3, a connecting plate 4, a seed delivery pipe 5 and a seed protection cover 6, and is characterized in that the upper surface of the front base body 9 of the core share 1 is regularly distributed with scale-shaped geometric structures 7 and the convex-hull geometric structure 8, the center-to-center distance L between the scale-shaped geometric structure 7 and the convex-hull geometric structure 8 is 5-25mm.

The invention is based on the fact that the scale surface structure and the convex structure of the soil cave animal pangolin have the characteristics of wear resistance, viscosity reduction and resistance reduction, and is determined according to optimization analysis and geometric measurement.

The surface shape of the scale-shaped geometric structure 7 is a centrally symmetrical hexagonal structure: the side length connected to the hexagonal axis of symmetry is L1, and L1 is 1 to 20 mm, and the side length parallel to the hexagonal axis of symmetry is L2, L2 is 1-30mm, the angle between two side lengths L1 is α ₁ , α ₁ is 120-130°, the angle between side length L1 and side length L2 is α ₂ , α ₂ is 100-110°, The height H1 of the scale-shaped geometric structure 7 is 1-4 mm, and the side inclination δ is 55-70°; the upper surface of the scale-shaped geometric structure 7 is a ribbed structure, and the shape expression of its bionic structure is: y=asin(bx+c );

Among them: x represents the length dimension of the rib, y represents the height dimension of the rib, a is the amplitude, b is the frequency, c is the initial phase, 0<a≤5, 0<bx+c<π, 0≤x≤8 .

The convex-hull geometric structure 8 has a smooth transition between its bag and the bottom surface, and the bottom surface is a horizontal smooth surface. The mathematical equation of the plane is Z=0. In the three-dimensional Euclidean space XYZ, the XY plane is the base, and Z is the vertical plane. axis, the equation for a "package" at the origin of coordinates is:

In the formula: x, y, z respectively represent the values on the three vertical coordinate axes in the three-dimensional Euclidean space XYZ, R is the radius of the top circle, R=1~4mm; R+r is the radius of the bottom circle, R+r = 5 ~ 10mm; h is the height of the convex hull, h = 1 ~ 4mm; adjust the size of R, r and h parameters, you can get convex hulls of different shapes and sizes.

The scale-shaped geometric structure 7 and the convex-hull-shaped geometric structure 8 are processed integrally with the base body 9 .

The invention has good technical effects of alleviating soil adhesion and reducing working resistance, can improve the quality of sowing and fertilizing, and reduce power consumption.

Description of drawings

Fig. 1 is the front view of the bionic core share type sowing opener

Fig. 2 is a top view of the bionic core share type sowing opener

Fig. 3 is a sectional view along A-A in Fig. 2

Fig. 4 is a sectional view along direction B-B in Fig. 2

Figure 5 is a planar model of the scale geometry

Figure 6 is a partial cross-sectional view of the scale-shaped and convex-hull geometric structures

Fig. 7 is a schematic diagram of the geometric parameters of the coreshare type sowing opener

Fig. 8 is a schematic diagram of the geometric parameters of the coreshare type sowing opener

Among them: 1. Core share 2. Share handle 3. Wing plate 4. Connecting plate 5. Seed delivery tube 6. Seed protection cover 7. Scale-shaped geometric structure 8. Convex hull-shaped geometric structure 9. Substrate

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing:

As shown in Figure 1, the vertical side length of the coreshare type sowing opener is H=80-140mm, the horizontal side length is L=130-170mm, the ridge curvature radius R1=250-350mm, and the surface shape of the scale-shaped geometric structure 7 is symmetrical. Hexagonal structure: side length L1 = 1-20mm, L2 = 1-30mm, inner angle α ₁ = 120-130°, inner angle α ₂ = 100-110°, convex-hull geometric structure 8, top circle radius R = 1~4mm; bottom circle radius R+r=5~10mm; convex hull height h=1~4mm. The distance L between the centers of the two bionic structures, the scale-shaped geometric structure 7 and the convex-hull geometric structure 8, is 5-25mm.

As shown in Fig. 5, the thickness of the conventional base body 9 is D=2-4mm, the height H1 of the scale-shaped geometric structure 7=1-4mm, and the side inclination angle δ=55°-70°. The surface bionic structure shape of the scale-shaped geometric structure 7 is: y=asin(bx+c). Among them: a is the amplitude, b is the frequency, c is the initial phase, 0<a≤5, 0<bx+c<π, 0≤x≤8.

As shown in Figure 7, the bevel angle γ=60-75°, and the width B=120-180mm.

As shown in Figure 8, the vertical side length of the coreshare type sowing opener is H=80-140mm, the entry angle a=15°-25°, and the clearance angle ε=5°.

Experiments show that, under the same working conditions, the core share type seeding ditch opener with the bionic structure of the present invention is compared with the common shape and non-combined steel core share type seeding ditch opener, and the work efficiency is improved by 8% ~12%, frictional resistance is reduced by 10~17%.

Claims (2)

1. A bionic core share type sowing ditch opener, consisting of a core share (1), a share handle (2), a wing plate (3), a connecting plate (4), a seed delivery pipe (5) and a seed protection cover (6 ), which is characterized in that the upper surface of the front base (9) of the core share (1) is regularly distributed with a scale-shaped geometric structure (7) and a convex-hull geometric structure (8), and a scale-shaped geometric structure (7) and a convex-hull The center-to-center distance L between the two geometric structures (8) is 5-25mm; the surface shape of the scale-shaped geometric structure (7) is a centrally symmetrical hexagonal structure: the side length connected to the hexagonal axis of symmetry is L ₁ , L ₁ is 1~20mm, the side length parallel to the hexagonal axis of symmetry is L ₂ , L ₂ is 1~30mm, the angle between two side lengths L ₁ is α ₁ , α ₁ is 120~130° , the angle between the side length L ₁ and the side length L ₂ is α ₂ , α ₂ is 100-110°, the height H ₁ of the scale-shaped geometric structure is 1-4mm, and the side inclination δ is 55-70°; the scale-shaped geometry The upper surface of the structure is a ribbed structure, and the shape expression of the bionic structure is: y=asin(bx+c); Among them: x represents the length dimension of the rib, y represents the height dimension of the rib, a is the amplitude, b is the frequency, c is the initial phase, 0<a≤5, 0<bx+c<π, 0≤x≤8 . 2. The bionic coreshare type seed ditch opener according to claim 1 is characterized in that the convex hull shape geometric structure (8) has a smooth transition between its "package" and the bottom surface, and the bottom surface is a horizontal smooth surface. The mathematical equation of the plane is Z=0. In the three-dimensional Euclidean space XYZ, with the XY plane as the base and Z as the vertical axis, the equation of a "package" at the origin of coordinates is: In the formula: x, y, z respectively represent the values on the three vertical coordinate axes in the three-dimensional Euclidean space XYZ, R is the radius of the top circle, R=1~4mm; R+r is the radius of the bottom circle, R+r =5~10mm; h is the height of the convex hull, h=1~4mm.