CN109511327B - Coupling bionic double-disc furrow opener suitable for viscous-weight soil - Google Patents

Abstract

The invention relates to a coupling bionic double-disc furrow opener suitable for viscous-weight soil, and belongs to the field of agricultural mechanical equipment. According to the invention, the outer surfaces of two discs of the double-disc furrow opener are provided with the ellipsoidal curved convex hulls which are arranged along the circumference of the discs, one side of the ellipsoidal curved convex hulls, which is close to the center of the discs, is provided with the flexible micro-thorns, the ellipsoidal curved convex hulls and the flexible micro-thorns are connected into a whole, so that a micro-thorn convex hull coupling bionic surface structure is formed, and the structure is uniformly distributed along the circumference radial direction on the working surface of the disc, and a plurality of layers of structures are uniformly arranged. In the working process of the furrow opener, the serrated cutting edge can reduce the contact area with soil, and the furrow opening resistance is reduced; contact of the disc surface with the soil will form a film of water. The bionic surface structure of the micro-thorn convex hull can destroy the continuity of a water film, reduce adhesion and reduce friction resistance, meanwhile, the flexible micro-thorn can be subjected to friction deformation, and tiny vibration can be generated during soil emergence, so that soil blocks adhered to the surface of the disc are easier to fall off, and the ditching quality and the working efficiency are improved.

Description

A coupled bionic double-disc opener suitable for clay-heavy soil

technical field

The invention relates to a coupled bionic double disc ditch opener suitable for sticky and heavy soil, which belongs to the technical field of agricultural machinery and equipment.

Background technique

The double disc opener is an important working part of the no-tillage seeder. Its principle is to use two rotating flat discs to cut the soil and push the soil to both sides to form a seed ditch with the same depth and flat shape. . The disc surface of ordinary double-disc openers is smooth and flat. During the ditching process, when the disc surface is in contact with the soil, it will cause stickiness due to the capillary force and viscous force caused by the continuous water ring or water film at the contact interface. Attached, this will increase soil disturbance and form a continuous water ring or water film, making the soil bonded to the surface of the disc difficult to fall off, increasing the resistance of ditching and affecting the quality of ditching.

Bionics is based on the characteristics and forms contained in creatures and nature, and imitates them with the help of modern technical means to achieve specific technical functions and goals. It is the combination of bionics and agricultural machinery design and manufacture to apply some functions of biological surface tissues and organs to the design of agricultural machinery to meet the needs of engineering technology.

Studies have found that many soil cave animals with high-efficiency digging capabilities in nature, such as mole crickets (Gryllotalpa orientalis Burmeister), mole rats (Scaptochirus moschatus), stinky dung beetles (Copris ochus Motchulsky), pangolins (Manis pentadactyla), etc., are used for digging The outer rings of soil limbs have a special structure and shape, which enable soil cave animals to easily cut into the soil with their claws and toes when digging, and realize efficient and continuous digging. It minimizes energy consumption and improves work efficiency. These features can just provide a good reference for the bionic design of agricultural machinery.

Breakthroughs have been made in designing the shape and structure of soil-contacting parts by using bionics as a research method to reduce the adhesion and resistance of soil to soil-contacting parts. However, when agricultural machinery is used in soil with heavy moisture, the soil behavior The complexity makes it difficult to control anti-adhesion and drag reduction. The adhesion of soil seriously reduces the operating efficiency and quality of ground machinery, increases energy consumption, and even makes the machine unable to operate.

However, the currently known soil-contacting parts of dryland farm implements with bionic geometric structures often adopt a single surface convex hull form. Although they have excellent operating results in dryland areas, it has been found in the actual promotion of paddy field operation areas with heavy soil. It has a certain restrictive effect on the anti-adhesion and drag reduction of soil. In the vast paddy fields of our country, the soil characteristics are different, and the requirements for anti-adhesion and drag reduction are also different. In view of the above problems, it is necessary to optimize the bionic geometric structure of the surface of the soil-contacting parts of agricultural machinery to the greatest extent, so that its anti-sticking and drag-reducing ability is stronger, so that the bionic soil-contacting parts of agricultural machinery with better performance can be promoted in various regions of my country.

Contents of the invention

The purpose of the present invention is to solve the problems in the above-mentioned prior art, and design and provide a coupling bionic double-disc opener structure suitable for clay-heavy soils, which can effectively reduce the adhesion of the disc surface during operation, Reduce the resistance when the opener is working, improve the quality and work efficiency of ditching, and facilitate subsequent fertilization and sowing operations.

The technical solution of the present invention is: a coupled bionic double-disc opener suitable for clay-heavy soil, and the outer surfaces of the two discs 1 of the double-disc opener are provided with ellipsoidal surfaces arranged along the circumference of the discs. Convex hull 2, flexible micro-thorns 3 are set on the side of the convex hull 2 on the ellipsoidal surface close to the center of the disc 1, and the convex hull 2 on the ellipsoidal surface and the flexible micro-thorns 3 are connected as a whole to form a micro-thorn convex hull coupled bionic surface Structure 4, this structure is evenly distributed on the working surface of the disc 1 along the radial direction of the circumference, and is evenly arranged in multiple layers.

Further, the cutting edge of the disc 1 has a bionic sawtooth geometric mechanism 5, and its contour curve is: y=nx ² , wherein the value range of n is 0.12-0.5, and the value range of x is -18-18mm.

Further, the thickness L of a single disk 1 in the double-disc opener is 3-8 mm; wherein, the distance from the ellipsoid convex hull 2 distributed on the outermost layer of the disk 1 to the outer edge of the cutting edge of the disk 1 P=5～25mm.

Further, the convex hull 2 of the ellipsoidal surface is an ellipsoidal surface with a bionic structure, and its equation is:

Among them: the value range of parameter a is 8-20, the value range of parameter b is 5-15, and the value range of parameter c is 1.5-4.5.

Further, the spherical crown height of the convex hull 2 on the ellipsoidal surface is H=0.6L-0.8L; the length of the convex hull 2 on the ellipsoidal surface is M=4L-6L; the width of the convex hull 2 on the ellipsoidal surface is N=1.5L- 3L; wherein, L is the thickness of a single disc 1 in the double disc opener, L=3-8mm.

Further, the number of flexible micro-thorns 3 set on a single ellipsoidal curved surface convex hull 2 is m=5-15, the shape of the flexible micro-thorns 3 is a long cylinder, the top of the long cylinder is a hemisphere, the diameter D2 of the long cylinder and the hemisphere at the top The body diameter D3 is the same, the length S of the flexible microthorn 3 is 3-12 mm, and D2 is 0.3H-0.6H.

Further, the distance between the line projected from the center point of the convex hull 2 of the single row of ellipsoidal surface on the disk 1 onto the disk 1 and the line projected from the center point of the convex hull 2 of the adjacent column of the ellipsoidal surface onto the disk 1 The included angle A=6-12°, and the distance between each layer is B=0.8N-2.4N.

The flexible microthorns 3 are made of polyvinyl chloride PVC or polyethylene PE.

The working principle of the present invention is:

In the present invention, the design of the biomimetic surface structure 4 coupled with its microthorn convex hull is carried out on the basis of the research and analysis of Procambarus clarkii (Procambarus clarkii), which inhabit wetlands, river banks or paddy field soil , can move freely in viscous mud, and is good at digging holes in the soil. Its exoskeleton has excellent characteristics of reducing viscosity, reducing drag and reducing friction, especially the cephalothorax that is in direct contact with the soil is more representative.

The surface of the claws of Procambarus clarkii has obvious ellipsoidal convex structure, and setae are distributed on one side of the ellipsoidal convex structure, and there is a certain gap between adjacent setae. The convex hull structure of the ellipsoidal surface makes the surface of the chelate appear non-smooth, which can destroy the continuous water film and reduce the contact area with the soil, so as to achieve desorption, and play the role of reducing viscosity, reducing drag and reducing friction. The surface of the chelicer has a certain curvature, which is beneficial to reduce the contact area with the soil when the chelicer digs a hole. It is similar to the surface shape of the forefoot of the mole cricket digging the soil. The bristles on the surface with a certain curvature are subjected to soil pressure and move relative to the soil. When it is used, it can produce elastic deformation and micro-shock, so that the soil is easier to detach from the surface of the claw. The present invention studies the structure and mechanical properties of the claw of Procambarus clarkii. According to the principle of bionics, it designs a sticky Coupling Bionic Dual Disc Openers for Heavy Soils.

The convex hull 2 of the ellipsoidal surface of the present invention can destroy the continuity of the water film formed by the contact between the surface of the disk 1 and the soil, and can reduce the adhesion of the soil, thereby reducing the resistance of ditching; the flexible micro-thorns 3 have good elasticity, are not easy to break, and have Good mechanical properties. It is squeezed and deformed in the process of contacting with the soil. When it is unearthed, it maintains its mechanical properties and restores its original state. During this process, the flexible micro-thorns will vibrate slightly, which can reduce the adhesion of the soil, making The soil is easier to fall off on the surface of the disc, and the large number of microthorns reduces the contact area between the soil and the surface of the disc, reduces the working resistance, and makes it difficult for the surface of the disc to form a water film, which plays the role of desorption and drag reduction.

At the present stage, the disc cutting edge of the double-disc opener generally adopts a circular arc shape, and the present invention takes the microscopic shape of the exoskeleton of the head of the Procambarus clarkii as the bionic prototype, and designs a bionic saw-toothed blade according to reverse engineering techniques. Cutting edge, this kind of cutting edge can reduce the contact area with the sticky and heavy soil, reduce the resistance to soil penetration, and have a stronger ability to crush soil and stubble. The shape of the convex hull widely used in the prior art is spherical, but the present invention takes the body surface shape of Procambarus clarkii as a bionic prototype, and designs and develops an ellipsoidal convex hull according to reverse engineering techniques, and sets a convex hull on one side of the convex hull. Flexible microthorns form a new type of microthorn-convex-hull coupling biomimetic surface structure. When the surface of the disc is in contact with the heavy soil, the convex hull of the ellipsoid can destroy the continuity of the water film formation, and the flexible micro-thorns will vibrate slightly, making the soil clods fall off the surface of the disc more easily, which can play a better role in anti-sticking Beneficial effect of drag reduction.

The beneficial effects of the present invention are: during the operation process of the double-disc opener of the present invention, the zigzag cutting edge can reduce the contact area with the soil, reduce the resistance to entry into the soil, and a continuous water ring will be formed when the surface of the disc is in contact with the soil. or water film, while the numerous ellipsoidal convex hulls on the surface of the disc will destroy the continuity of the water film, and the flexible microthorns will reduce the contact area between the disc surface and the soil, making it difficult for the water film to form continuously and reducing the soil The soil clods are easier to fall off on the surface of the disc, and the flexible micro-thorns will elastically deform when they come into contact with the soil. When they are unearthed, they will maintain the original mechanical properties and produce micro-vibrations, which further reduces the soil pressure. Excellent adhesion makes the soil clods fall off more easily, and the disc will not stick, which reduces the working resistance of the opener, improves the quality of ditching and work efficiency, and facilitates subsequent fertilization and sowing operations.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a schematic view of the disc structure of the present invention;

Fig. 3 is the left view sectional view of the convex hull of the ellipsoidal surface of the present invention;

Fig. 4 is the left view of microthorn of the present invention;

Fig. 5 is the top view of the convex hull of the ellipsoidal surface and microthorns of the present invention;

Fig. 6 is a front view of the sawtooth cutting edge of the disc of the present invention.

Each label in Fig. 1-6: 1-disc, 2-convex hull of ellipsoidal surface, 3-flexible micro-thorn, 4-micro-thorn convex-hull coupling bionic surface structure, 5- bionic sawtooth geometric mechanism.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Embodiment 1: As shown in Figure 1-6, a coupling bionic double-disc ditch opener suitable for clay heavy soil, the outer surfaces of the two discs 1 of the double-disc ditch opener are set along the disc Ellipsoidal convex hulls 2 arranged in a circle, flexible micro-thorns 3 are arranged on the side of the ellipsoidal curved surface convex hull 2 close to the center of the disc 1, and the ellipsoidal curved surface convex hulls 2 and flexible micro-thorns 3 are connected as a whole to form a microscopic The thorny convex hull is coupled with the bionic surface structure 4, which is evenly distributed radially along the circumference of the working surface of the disc 1, and is evenly arranged in 5 layers.

Further, the cutting edge of the disc 1 is set as a bionic sawtooth geometric mechanism 5, and its contour curve is: y=0.3x ² , and the value range of x is -18 ~ 18mm (that is, the endpoint value is taken within this range, and the endpoint Any value within the range is acceptable).

Further, the thickness L of a single disk 1 in the double-disc opener = 4mm; wherein, the distance P from the ellipsoidal convex hull 2 distributed on the outermost layer of the disk 1 to the outer edge of the cutting edge of the disk 1 = 5mm.

Further, the convex hull 2 of the ellipsoidal surface is an ellipsoidal surface with a bionic structure, and its equation is:

Among them: the value range of parameter a is 8~20 (that is, take the endpoint value in this range, any value in the endpoint range is acceptable), the value range of parameter b is 5~15 (that is, take the endpoint value in this range, Any value within the endpoint range is acceptable), and the value range of parameter c is 1.5 to 4.5 (that is, the endpoint value is taken within this range, and any value within the endpoint range is acceptable).

Further, the spherical crown height of the convex hull 2 of the ellipsoidal surface is H=0.75L=3mm; the length of the convex hull 2 of the ellipsoidal surface is M=5L=20mm; the width of the convex hull 2 of the ellipsoidal surface is N=3L=12mm; Wherein, L is the thickness of a single disc 1 in the double disc opener, L=4mm.

Further, the number of flexible micro-thorns 3 set on a single ellipsoidal convex hull 2 is m=5, the shape of the flexible micro-thorns 3 is a long cylinder, the top of the long cylinder is a hemisphere, the diameter D2 of the long cylinder and the diameter of the hemisphere at the top D3 is the same, the lengths of the flexible microthorns 3 are 5mm, 4mm, 3mm, 4mm, 5mm respectively, D2=0.3H=0.9mm.

Further, the distance between the line projected from the center point of the convex hull 2 of the single row of ellipsoidal surface on the disk 1 onto the disk 1 and the line projected from the center point of the convex hull 2 of the adjacent column of the ellipsoidal surface onto the disk 1 The included angle A=9°, and the distance between each layer is B=1.5N=18mm.

Further, the flexible microthorns 3 are made of polyvinyl chloride PVC or polyethylene PE.

The structural characteristics of the bionic coupling double-disc opener in this embodiment are: the sawtooth of the disc cutting edge is small, the number of arrangements is large, the ability to penetrate into the soil is strong, the volume of the convex hull of the ellipsoidal surface is small, and the diameter of the bionic coupling surface structure of the microthorn convex hull is large. The included angle is small, so the convex hulls on the ellipsoidal surface of the disk are densely arranged, which reduces the contact area between the soil and the surface of the disk, reduces the adhesion of the soil, and has a small number of microthorns, which is convenient for processing and saves costs; and Compared with ordinary double-disc openers, the desorption and drag reduction ability is stronger, which improves the quality of ditching and work efficiency, and is suitable for operations in areas with relatively sticky soil.

Embodiment 2: As shown in Figure 1-6, a kind of coupled bionic double-disc ditch opener suitable for clay heavy soil, the outer surfaces of the two discs 1 of the double-disc ditch opener are set along the disc Ellipsoidal convex hulls 2 arranged in a circle, flexible micro-thorns 3 are arranged on the side of the ellipsoidal curved surface convex hull 2 close to the center of the disc 1, and the ellipsoidal curved surface convex hulls 2 and flexible micro-thorns 3 are connected as a whole to form a microscopic The spine-convex hull is coupled with the bionic surface structure 4, which is evenly distributed radially along the circumference of the working surface of the disk 1, and is evenly arranged in three layers.

Further, the cutting edge of the disc 1 is set as a bionic sawtooth geometric mechanism 5, and its contour curve is: y=0.3x ² , and the value range of x is -18 ~ 18mm (that is, the endpoint value is taken within this range, and the endpoint Any value within the range is acceptable).

Further, the thickness L of a single disk 1 in the double-disc opener = 6mm; wherein, the distance P from the ellipsoidal convex hull 2 distributed on the outermost layer of the disk 1 to the outer edge of the cutting edge of the disk 1 = 8mm.

Further, the convex hull 2 of the ellipsoidal surface is an ellipsoidal surface with a bionic structure, and its equation is:

Among them: the value range of parameter a is 8~20 (that is, take the endpoint value in this range, any value in the endpoint range is acceptable), the value range of parameter b is 5~15 (that is, take the endpoint value in this range, Any value within the endpoint range is acceptable), and the value range of parameter c is 1.5 to 4.5 (that is, the endpoint value is taken within this range, and any value within the endpoint range is acceptable).

Further, the spherical crown height H of the convex hull 2 on the ellipsoidal surface=4mm; the length M=28mm of the convex hull 2 on the ellipsoidal surface; the width N=18mm of the convex hull 2 on the ellipsoidal surface; wherein, L is a double disk The thickness of a single disc 1 in the opener, L=6mm.

Further, the number of flexible micro-thorns 3 set on a single ellipsoidal curved surface convex hull 2 is m=8, the shape of the flexible micro-thorns 3 is a long cylinder, the top of the long cylinder is a hemisphere, the diameter D2 of the long cylinder and the diameter of the hemisphere at the top D3 is the same, the length S of the flexible microthorn 3 is 3-12 mm, and D2 is 1.8 mm.

Further, the distance between the line projected from the center point of the convex hull 2 of the single row of ellipsoidal surface on the disk 1 onto the disk 1 and the line projected from the center point of the convex hull 2 of the adjacent column of the ellipsoidal surface onto the disk 1 The included angle A=12°, and the distance between each layer is B=20mm.

Further, the flexible microthorns 3 are made of polyvinyl chloride PVC or polyethylene PE.

The structural characteristics of the bionic coupling double-disc opener in this embodiment are: the sawtooth of the disc cutting edge is relatively large, the number of arrangements is large, the ability to penetrate into the soil is strong, the volume of the convex hull of the ellipsoidal surface is large, and the bionic coupling surface of the microthorn convex hull The radial angle of the structure is relatively large, so the convex hulls on the surface of the disc are sparsely arranged, but it also reduces the contact area between the soil and the disc surface, reduces the adhesion of the soil, and has a large number of microthorns ;Compared with ordinary double-disc openers, it has a certain desorption and drag reduction ability, which can improve ditching quality and work efficiency, and is suitable for operations in areas with heavy soil.

Embodiment 3: As shown in Figure 1-6, a kind of coupled bionic double-disc ditch opener suitable for sticky and heavy soil, the outer surfaces of the two discs 1 of the double-disc ditch opener are set along the disc Ellipsoidal convex hulls 2 arranged in a circle, flexible micro-thorns 3 are arranged on the side of the ellipsoidal curved surface convex hull 2 close to the center of the disc 1, and the ellipsoidal curved surface convex hulls 2 and flexible micro-thorns 3 are connected as a whole to form a microscopic The thorn convex hull is coupled with the bionic surface structure 4, which is evenly distributed radially along the circumference of the working surface of the disk 1, and is evenly arranged in multiple layers.

Further, the cutting edge of the disc 1 is set as a bionic sawtooth geometric mechanism 5, and its contour curve is: y=nx ² , wherein the value range of n is 0.12, and the value range of x is -18～18mm (that is, Take the endpoint value in this range, any value within the endpoint range is acceptable).

Further, the thickness L of a single disk 1 in the double-disc opener = 3 mm; wherein, the distance P from the ellipsoidal convex hull 2 distributed on the outermost layer of the disk 1 to the outer edge of the cutting edge of the disk 1 = 5mm.

Further, the convex hull 2 of the ellipsoidal surface is an ellipsoidal surface with a bionic structure, and its equation is:

Among them: the value range of parameter a is 8~20 (that is, take the endpoint value in this range, any value in the endpoint range is acceptable), the value range of parameter b is 5~15 (that is, take the endpoint value in this range, Any value within the endpoint range is acceptable), and the value range of parameter c is 1.5 to 4.5 (that is, the endpoint value is taken within this range, and any value within the endpoint range is acceptable).

Further, the spherical crown height of the convex hull 2 of the ellipsoidal surface is H=0.6L; the length of the convex hull 2 of the ellipsoidal surface is M=4L; the width of the convex hull 2 of the ellipsoidal surface is N=1.5L; wherein, L is double The thickness of a single disc 1 in the disc opener, L=3mm.

Further, the number of flexible micro-thorns 3 set on a single ellipsoidal convex hull 2 is m=5, the shape of the flexible micro-thorns 3 is a long cylinder, the top of the long cylinder is a hemisphere, the diameter D2 of the long cylinder and the diameter of the hemisphere at the top D3 is the same, the length S of the flexible microthorn 3 is 3mm, and D2 is 0.3H.

Further, the distance between the line projected from the center point of the convex hull 2 of the single row of ellipsoidal surface on the disk 1 onto the disk 1 and the line projected from the center point of the convex hull 2 of the adjacent column of the ellipsoidal surface onto the disk 1 The included angle is A=6°, and the distance between each layer is B=0.8N.

Further, the flexible microthorns 3 are made of polyvinyl chloride PVC or polyethylene PE.

Embodiment 4: As shown in Figures 1-6, a coupled bionic double-disc opener suitable for clay-heavy soils is provided on the outer surfaces of the two discs 1 of the double-disc opener along the disc Ellipsoidal convex hulls 2 arranged in a circle, flexible micro-thorns 3 are arranged on the side of the ellipsoidal curved surface convex hull 2 close to the center of the disc 1, and the ellipsoidal curved surface convex hulls 2 and flexible micro-thorns 3 are connected as a whole to form a microscopic The thorn convex hull is coupled with the bionic surface structure 4, which is evenly distributed radially along the circumference of the working surface of the disk 1, and is evenly arranged in multiple layers.

Further, the cutting edge of the disc 1 has a bionic sawtooth geometric mechanism 5, and its contour curve is: y=nx ² , wherein the value range of n is 0.4, and the value range of x is -18 ~ 18mm (that is, the Take the endpoint value within the range, any value within the endpoint range is acceptable).

Further, the thickness L of a single disk 1 in the double-disc opener = 6mm; wherein, the distance P from the ellipsoidal convex hull 2 distributed on the outermost layer of the disk 1 to the outer edge of the cutting edge of the disk 1 = 20mm.

Further, the convex hull 2 of the ellipsoidal surface is an ellipsoidal surface with a bionic structure, and its equation is:

Among them: the value range of parameter a is 8~20 (that is, take the endpoint value in this range, any value in the endpoint range is acceptable), the value range of parameter b is 5~15 (that is, take the endpoint value in this range, Any value within the endpoint range is acceptable), and the value range of parameter c is 1.5 to 4.5 (that is, the endpoint value is taken within this range, and any value within the endpoint range is acceptable).

Further, the spherical crown height of the convex hull 2 of the ellipsoidal surface is H=0.7L; the length of the convex hull 2 of the ellipsoidal surface is M=5L; the width of the convex hull 2 of the ellipsoidal surface is N=2L; wherein, L is a double circle The thickness of a single disc 1 in the disc opener, L=6mm.

Further, the number of flexible micro-thorns 3 set on the convex hull 2 of a single ellipsoidal surface is m=10, the shape of the flexible micro-thorns 3 is a long cylinder, the top of the long cylinder is a hemisphere, the diameter D2 of the long cylinder and the diameter of the hemisphere at the top D3 is the same, the length S of the flexible microthorn 3 is 10mm, and D2 is 0.4H.

Further, the distance between the line projected from the center point of the convex hull 2 of the single row of ellipsoidal surface on the disk 1 onto the disk 1 and the line projected from the center point of the convex hull 2 of the adjacent column of the ellipsoidal surface onto the disk 1 The included angle A=10°, and the distance between each layer is B=1N.

The flexible microthorns 3 are made of polyvinyl chloride PVC or polyethylene PE.

Embodiment 5: As shown in Figure 1-6, a kind of coupled bionic double-disc ditch opener suitable for sticky and heavy soil, the outer surfaces of the two discs 1 of the double-disc ditch opener are arranged along the disc Ellipsoidal convex hulls 2 arranged in a circle, flexible micro-thorns 3 are arranged on the side of the ellipsoidal curved surface convex hull 2 close to the center of the disc 1, and the ellipsoidal curved surface convex hulls 2 and flexible micro-thorns 3 are connected as a whole to form a microscopic The thorn convex hull is coupled with the bionic surface structure 4, which is evenly distributed radially along the circumference of the working surface of the disk 1, and is evenly arranged in multiple layers.

Further, the cutting edge of the disc 1 has a bionic sawtooth geometric mechanism 5, and its contour curve is: y=nx ² , wherein the value range of n is 0.5, and the value range of x is -18 ~ 18mm (that is, the Take the endpoint value within the range, any value within the endpoint range is acceptable).

Further, the thickness L of a single disk 1 in the double-disc opener = 8 mm; wherein, the distance P from the ellipsoid convex hull 2 distributed on the outermost layer of the disk 1 to the outer edge of the cutting edge of the disk 1 = 25mm.

Further, the convex hull 2 of the ellipsoidal surface is an ellipsoidal surface with a bionic structure, and its equation is:

Among them: the value range of parameter a is 8~20 (that is, take the endpoint value in this range, any value in the endpoint range is acceptable), the value range of parameter b is 5~15 (that is, take the endpoint value in this range, Any value within the endpoint range is acceptable), and the value range of parameter c is 1.5 to 4.5 (that is, the endpoint value is taken within this range, and any value within the endpoint range is acceptable).

Further, the spherical crown height of the convex hull 2 on the ellipsoidal surface is H=0.8L; the length of the convex hull 2 on the ellipsoidal surface is M=6L; the width of the convex hull 2 on the ellipsoidal surface is N=3L; wherein, L is a double circle The thickness of a single disc 1 in the disc opener, L=8mm.

Further, the number of flexible microthorns 3 set on a single ellipsoidal curved surface convex hull 2 is m=15, the shape of the flexible microthorns 3 is a long cylinder, the top of the long cylinder is a hemisphere, the diameter D2 of the long cylinder and the diameter of the hemisphere at the top D3 is the same, the length S of the flexible microthorn 3 is 12mm, and D2 is 0.6H.

Further, the distance between the line projected from the center point of the convex hull 2 of the single row of ellipsoidal surface on the disk 1 onto the disk 1 and the line projected from the center point of the convex hull 2 of the adjacent column of the ellipsoidal surface onto the disk 1 The included angle A=12°, and the distance between each layer is B=2.4N.

The flexible microthorns 3 are made of polyvinyl chloride PVC or polyethylene PE.

The specific embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and can also be made without departing from the gist of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. Variations.

Claims (1)

1. The utility model provides a coupling bionical double round disc furrow opener suitable for gluey heavy soil which characterized in that: an ellipsoidal curved surface convex hull (2) which is arranged along the circumference of the disc is arranged on the outer surfaces of two discs (1) of the double-disc furrow opener, a flexible micro-thorn (3) is arranged on one side, close to the center of the disc (1), of the ellipsoidal curved surface convex hull (2), the ellipsoidal curved surface convex hull (2) and the flexible micro-thorn (3) are connected into a whole, so that a micro-thorn convex hull coupling bionic surface structure (4) is formed, and the structure is uniformly distributed on the working surface of the disc (1) along the circumference radial direction and is uniformly arranged in multiple layers;

the cutting edge of the disc (1) is provided with a bionic sawtooth geometric mechanism (5), and the contour curve of the bionic sawtooth geometric mechanism is as follows:whereinnThe range of the value is 0.12 to 0.5,xthe range of the value is-18 mm;

the thickness L=3-8 mm of a single disc (1) in the double-disc furrow opener; wherein, the distance P=5-25 mm from the ellipsoidal curved convex hull (2) distributed on the outermost layer of the disc (1) to the outer edge of the cutting edge of the disc (1);

the ellipsoidal curved surface convex hull (2) is an ellipsoid with a bionic structure, and the equation is as follows:；

wherein: the value range of the parameter a is 8-20, the value range of the parameter b is 5-15, and the value range of the parameter c is 1.5-4.5;

the spherical crown height H=0. L-0.8L of the ellipsoidal curved convex hull (2); the length M= L to 6L of the ellipsoidal curved convex hull (2); the width N=1.5L-3L of the ellipsoidal curved convex hull (2); wherein L is the thickness of a single disc (1) in the double-disc furrow opener, and L=3-8 mm;

the number m=5-15 of flexible micropins (3) arranged on the single ellipsoidal curved convex hull (2), the shape of the flexible micropins (3) is a long cylinder, the top end of the long cylinder is a hemispherical body, the diameter D2 of the long cylinder is the same as the diameter D3 of the hemispherical body at the top end of the long cylinder, the length S=3-12 mm of the flexible micropins (3), and D2=0.3H-0.6H;

the included angle A between the connecting line of the central point of the single-row ellipsoidal curved convex hull (2) on the disc (1) projected onto the disc (1) and the connecting line of the central point of the ellipsoidal curved convex hull (2) of the adjacent row projected onto the disc (1) is 6-12 degrees, and the interval of each layer is B=0.8N-2.4N;

the flexible micropuncture (3) is made of polyvinyl chloride (PVC) or Polyethylene (PE).