阅读说明：本技术 一种角度可变的自调节式仿生风扇 (Angle-variable self-adjusting bionic fan ) 是由 赵佳乐 王筱庚 路云 张成春 韩志武 庄健 郭明卓 魏延鹏 田宏丽 吴思阳 于 2020-12-03 设计创作，主要内容包括：本发明涉及农业机械领域,具体涉及到一种角度可变的自调节式仿生风扇,该风扇包括中心装载体、转向舵机、仿生扇叶、气体流量传感器和嵌入式开发板组成；所述仿生扇叶上半部分A、B两点之间为风扇扇叶的外缘曲线,所述外缘曲线是由多个(模拟座头鲸鱼鳍外缘曲线)外凸的外缘凸包连接而成；所述仿生扇叶下半部分A′、B′两点之间为风扇扇叶的内缘曲线,所述内缘曲线是由多个(模拟座头鲸鱼鳍外缘曲线)内凹的内缘凸包连接而成,本发明仿生风扇可在工作中过程中模仿鲸鱼游动时鱼鳍的摆动,增加风扇的气流量,同时稳定气流,适用于气力式排种器在任何环境下进行作业。(The invention relates to the field of agricultural machinery, in particular to a self-adjusting bionic fan with a variable angle, which comprises a central loading body, a steering engine, bionic fan blades, a gas flow sensor and an embedded development plate, wherein the central loading body is provided with a plurality of blades; the outer edge curve of the fan blade is arranged between two points of the upper half A, B of the bionic fan blade, and the outer edge curve is formed by connecting a plurality of convex outer edge convex hulls (simulating the outer edge curve of a whale fin); the bionic fan can simulate the swinging of the fins when whales move in the working process, increase the air flow of the fan, stabilize the air flow and be suitable for a pneumatic seed sowing device to operate in any environment.)

1. The utility model provides a bionical fan of changeable self-interacting formula of angle which characterized in that: the fan comprises a central loading carrier (1), a steering engine (2), bionic fan blades (3), an air flow sensor (4) and an embedded development plate (5); the central loading body (1) is a hollow cylinder with a closed single surface, a plurality of uniformly distributed grooves (1-1) are machined in the circumferential direction on the central loading body (1), and the steering engine (2) is installed in each groove (1-1) of the central loading body (1); the gas flow sensor (4) is arranged at the front end of the central loading body (1) along the circumferential direction; the bionic fan blades (3) are arranged on a steering output shaft of each steering engine (2); the embedded development board (5) is respectively connected with the steering engine (2) and the gas flow sensor (4) through data transmission lines.

2. The self-adjustable bionic fan with variable angle as claimed in claim 1, wherein: the fan blade outer edge curve is arranged between two points A, B on the upper half part of the bionic fan blade (3), the outer edge curve is formed by connecting a plurality of convex outer edge convex hulls (3-1), wherein the curve formula of each outer edge convex hull (3-1) is as follows:

f_{outer cover}(x)＝a1*exp(-((x-b1)/c1)²)+a2*exp(-((x-b2)/c2)²)+a3*exp(-((x-b3)/c3)²)+a4*exp(-((x-b4)/c4)²)+a5*exp(-((x-b5)/c5)²)+a6*exp(-((x-b6)/c6)²)+a7*exp(-((x-b7)/c7)²)

Wherein:

50≤x≤1000

a₁＝39.77；b₁＝405.9；c₁＝84.47；a₂＝-178.3；b₂＝463.2；c₂＝675.2；a₃＝89.13；b₃＝309；

c₃＝62.73；a₄＝0；b₄＝643.6；c₄＝3.873；a₅＝-58.98；b₅＝299.5；c₅＝39.62；a₆＝135.6；b₆＝559.3；

c₆＝142.3；a₇＝225.1；b₇＝220.2；c₇＝402

the inner edge curve of the fan blade is arranged between the two points A 'and B' on the lower half part of the bionic fan blade (3), the inner edge curve is formed by connecting a plurality of inwards concave inner edge convex hulls (3-2), and the curve formula of the inner edge convex hull (3-2) of each bionic fan blade (3) is as follows:

f_{inner part}(x)＝p₁x³+p₂x²+p₃x+p₄

p₁＝8.507e-05；p₂＝-0.1014；p₃＝39.62；p₄＝-4977

The upper surface and the lower surface of the bionic fan blade (3) are provided with a plurality of feather-shaped bulges (3-3) which are obliquely arranged.

3. The self-adjustable bionic fan with variable angle as claimed in claim 1, wherein:

a. the central loading body (1) is a hollow cylinder with the height of 400mm, the outer diameter of 100mm and the inner diameter of 70mm and single-side closed, eight grooves (1-1) are formed in the periphery of the middle of the hollow cylinder, and the grooves (1-1) are 70mm long, 50mm wide and 30mm deep and are used for mounting a steering engine (2);

b. the steering engine (2) is of a cuboid structure with the length of 70mm, the width of 50mm and the height of 30mm, a steering output shaft of the steering engine is a cylinder with the diameter of 10mm and the length of 30mm, and a key groove with the length of 8mm and the depth of 2mm is formed in the output shaft;

c. the gas flow sensor (4) is a sleeve with the height of 50mm and the diameter of 120mm, 10 gas flow sensors (4) are evenly distributed on the periphery, the length of each gas flow sensor is 10mm, the width of each gas flow sensor is 10mm, and the height of each gas flow sensor is 5mm, so that the gas flow sensor is a cuboid sensor body (4-1).

4. The self-adjustable bionic fan with variable angle as claimed in claim 1, wherein: the embedded development board (5) is a cuboid with the length of 150mm, the width of 100mm and the thickness of 10 mm.

Technical Field

The invention relates to the field of agricultural machinery, in particular to a self-adjusting bionic fan with a variable angle.

Background

With the increasing demand of agricultural planting on seeding quality and speed, the design and manufacture of the seed sowing device are emphasized by people, and the pneumatic seed sowing device is more and more accepted by people due to the advantages of strong universality, small damage to seeds, high operation speed block, high operation precision and the like.

The fan of the fan is one of the most important devices of the pneumatic seed sowing device and is used for providing stable air pressure for the pneumatic seed sowing device so as to improve the sowing quality; when the seeder works, the environment is complex and the operation difficulty is high. Under the influence of environmental factors, the air flow generated by the fan of the existing pneumatic seeder hardly meets the seeding requirement, and simultaneously, the air pressure generated by the fan hardly keeps a stable state due to the influence of vibration, so that uneven seeding and poor seeding effect are caused; therefore, designing a fan capable of increasing flow and stabilizing pressure is an important problem faced by the current pneumatic seed sowing device.

Disclosure of Invention

The invention provides a self-adjusting bionic fan with variable angle, which can simulate the swing of fins when whales move in the working process, increase the air flow of the fan and stabilize the air flow, and is suitable for the operation of a pneumatic seed sowing device in any environment.

The purpose of the invention is realized as follows: a self-adjusting bionic fan with variable angles comprises a central loading body, a steering engine, bionic fan blades, an air flow sensor and an embedded development plate; the central loading body is a hollow cylinder with a single closed surface, a plurality of uniformly distributed grooves are formed in the central loading body along the circumferential direction, and the steering engine is arranged in each groove of the central loading body; the gas flow sensor is arranged at the front end of the central loading body along the circumferential direction; the bionic fan blades are arranged on the steering output shaft of each steering engine; the embedded development board is respectively connected with the steering engine and the gas flow sensor through data transmission lines.

The fan blade outer edge curve is formed by connecting a plurality of convex outer edge convex hulls between two points A, B on the upper half part of the bionic fan blade, wherein the curve formula of each outer edge convex hull is as follows:

f_{outer cover}(x)＝a1*exp(-((x-b1)/c1)²)+a2*exp(-((x-b2)/c2)²)+a3*exp(-((x-b3)/c3)²)+a4*exp(-((x-b4)/c4)²)+a5*exp(-((x-b5)/c5)²)+a6*exp(-((x-b6)/c6)²)+a7*exp(-((x-b7)/c7)²)

Wherein:

50≤x≤1000

a₁＝39.77；b₁＝405.9；c₁＝84.47；a₂＝-178.3；b₂＝463.2；c₂＝675.2；a₃＝89.13；b₃＝309；

c₃＝62.73；a₄＝0；b₄＝643.6；c₄＝3.873；a₅＝-58.98；b₅＝299.5；c₅＝39.62；a₆＝135.6；b₆＝559.3；

c₆＝142.3；a₇＝225.1；b₇＝220.2；c₇＝402

the fan blade inner edge curve is formed by connecting a plurality of concave inner edge convex hulls between the two points A 'and B' of the lower half parts of the bionic fan blades, wherein the curve formula of each bionic fan blade inner edge convex hull is as follows:

f_{inner part}(x)＝p₁x³+p₂x²+p₃x+p₄

p₁＝8.507e-05；p₂＝-0.1014；p₃＝39.62；p₄＝-4977

The upper surface and the lower surface of the bionic fan blade are provided with a plurality of feather-shaped bulges which are obliquely arranged.

The invention has the following advantages and positive effects:

1. the bionic fan simulates the swing of fins when whales move by sensing the air flow of the fan, self-adjustment is carried out, the air quantity of the fan is increased and stabilized, meanwhile, the blade surface simulates feathers, the air flow passing performance is increased, and the air pressure of the fan during working is ensured.

2. After the fan works, a wind pressure signal is transmitted into the embedded development plate through the gas flow sensor on the fan, the embedded development plate controls the steering engine to rotate after carrying out data analysis and processing according to the transmitted signal, the swinging of the fins when whales swim is simulated, the air flow of the fan is increased, and meanwhile, the air flow is stabilized.

3. The bionic fan can simulate the swing of fins when whales swim in the working process, increases the air flow of the fan, stabilizes the air flow, and is suitable for the operation of a pneumatic seed sowing device in any environment.

4. The bionic fan has the advantages of simple structure, reasonable design and particular convenience in use.

Drawings

Fig. 1 is an isometric view of a variable angle self-adjusting bionic fan of the present invention.

FIG. 2 is an isometric view of a center-mount carrier with an attached gas flow sensor of the present invention.

Fig. 3 is an isometric view of the steering engine of the present invention.

FIG. 4 is a two-dimensional view of a bionic fan blade according to the present invention.

Detailed Description

Shown in attached figures 1 and 2: a self-adjusting bionic fan with variable angles comprises a central loading body 1, a steering engine 2, bionic fan blades 3, an air flow sensor 4 and an embedded development plate 5; the steering engine 2 (which can be selected from a product produced by Shenzhen Power dimension model science and technology Limited, namely the Power dimension LVH) is installed in each groove 1-1 of the central loading body 1 through a buckle; the gas flow sensor 4 is arranged at the front end of the central loading body 1 in a circumferential direction in an adhesion mode; the bionic fan blades 3 are arranged on the steering output shaft of each steering engine 2 and are connected through welding; the embedded development board 5 (which can be selected from a mutual visibility product-HYDR-18.5) is respectively connected with the steering engine 2 and the gas flow sensor 4 through data transmission lines.

Shown in figure 2: the central loading body 1 is a hollow cylinder with a height of 400mm, an outer diameter of 100mm and an inner diameter of 70mm and a single-surface closed, 8 grooves 1-1 are formed in the periphery of the middle of the hollow cylinder, and the grooves 1-1 are 70mm long, 50mm wide and 30mm deep and are used for mounting the steering engine 2.

As shown in figure 3: the steering engine 2 is a cuboid structure with the length of 70mm, the width of 50mm and the height of 30mm, and a steering output shaft of the steering engine is a cylinder with the diameter of 10mm and the length of 30 mm; a key groove with the length of 8mm and the depth of 2mm is formed in the output shaft, so that the bionic fan blades 3 can be conveniently installed; the steering engine 2 is connected with the embedded development plate 5 through a data transmission line, the embedded development plate 5 controls the bionic fan blades 3 (fin simulating whales moving about) to swing during working, the steering engine 2 can control the steering angle of the bionic fan blades 3 to be 5-35 degrees, and the reaction time of the steering engine 2 is 0.08S; during operation, the reciprocating rotary swing is carried out according to the set air flow, and the swing frequency is 100 times/second.

As shown in fig. 4: the outer edge curve of the fan blade is arranged between two points A, B on the upper half part of the bionic fan blade 3, the outer edge curve is formed by connecting a plurality of (simulating the outer edge curve of the fins of the whale) convex outer edge convex hulls 3-1, wherein the curve formula of each outer edge convex hull 3-1 is as follows:

f_{outer cover}(x)＝a1*exp(-((x-b1)/c1)²)+a2*exp(-((x-b2)/c2)²)+a3*exp(-((x-b3)/c3)²)+a4*exp(-((x-b4)/c4)²)+a5*exp(-((x-b5)/c5)²)+a6*exp(-((x-b6)/c6)²)+a7*exp(-((x-b7)/c7)²)

Wherein:

50≤x≤1000

a₁＝39.77；b₁＝405.9；c₁＝84.47；a₂＝-178.3；b₂＝463.2；c₂＝675.2；a₃＝89.13；b₃＝309；

c₃＝62.73；a₄＝0；b₄＝643.6；c₄＝3.873；a₅＝-58.98；b₅＝299.5；c₅＝39.62；a₆＝135.6；b₆＝559.3；

c₆＝142.3；a₇＝225.1；b₇＝220.2；c₇＝402

as shown in fig. 4: the inner edge curve of the fan blade is arranged between the two points A 'and B' on the lower half part of the bionic fan blade 3, the inner edge curve is formed by connecting a plurality of inwards concave inner edge convex hulls 3-2 (simulating the outer edge curve of the fin of a whale), wherein the curve formula of the inner edge convex hull 3-2 of each bionic fan blade 3 is as follows:

f_{inner part}(x)＝p₁x³+p₂x²+p₃x+p₄

p₁＝8.507e-05；p₂＝-0.1014；p₃＝39.62；p₄＝-4977

The number of the outer edge convex hulls 3-1 is 8, the number of the inner edge convex hulls 3-2 is 3, and the outer edge convex hulls and the inner edge convex hulls are uniformly arranged at the edge of the fan.

The curve shapes of the other two parts (between A, A 'and B, B') of the bionic fan blade 3 outer edge curve can be freely determined according to the design requirements according to the shape of the fan blade in the prior art, and the bionic fan blade is in natural transition without special requirements.

The upper surface and the lower surface of the bionic fan blade 3 are provided with a plurality of feather-shaped bulges 3-3 which are obliquely arranged, the feather-shaped bulges 3-3 are manufactured according to the shape of the outer surface of bird feathers, the number of the feather-shaped bulges on the upper surface and the lower surface of the bionic fan blade 3 is 50, the feather-shaped bulges are formed by stamping during manufacturing, and the bulges are uniformly linearly arranged in the direction of 35 degrees from the horizontal plane (shown in figure 4).

Shown in figure 2: the gas flow sensor 4 is a sleeve with the height of 50mm and the diameter of 120mm, and is adhered to the central loading body 1 through a binder, and 10 cuboid sensor bodies 4-1 with the length of 10mm, the width of 10mm and the height of 5mm are uniformly distributed on the periphery of the gas flow sensor 4.

Shown in figure 1: the embedded development board 5 is 150mm long, and wide for 100mm, thickness is 10 mm's cuboid, and embedded development board 5 links to each other with gas flow sensor 4 and steering engine 2 respectively through two data transmission lines, and during operation, embedded development board 5 controls the angle and the rotational frequency that turn to steering engine 2 and then the amount of wind of control fan through collecting the air current signal that gas flow sensor 4 passed back.