CN113786993A

CN113786993A - Fan-driven corn cleaning mechanism with bird feather imitating surface structure

Info

Publication number: CN113786993A
Application number: CN202111111266.XA
Authority: CN
Inventors: 王立军; 姜春哲; 张森; 马兆; 王博; 于鲲檬; 毕晟莹; 高云鹏
Original assignee: Northeast Agricultural University
Current assignee: Northeast Agricultural University
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2021-12-14

Abstract

A corn cleaning mechanism with a fan-like bird feather surface structure belongs to agricultural machinery; the purpose is to clean corn grains through the screen surface structure of the bird feather-like surface structure and the movement form similar to the bird's flapping wings, because the cam rotates around the transmission shaft. Rotation drives the screen surface 1 and the screen surface 2 to swing up and down, because the screen surface 1 and the screen surface 2 are hinged together through the long axis, and the screen surface can rotate around the long axis, and the long axis is fixed on the frame, so the screen Surface 1 and screen surface 2 perform arc swinging motion around the long axis, so that the screen surface can perform a movement similar to that of birds flapping their wings, reduce the accumulation of corn exudates between the screen surfaces, and increase the feeding amount. Under the action of the "w"-shaped raised screen surface structure on the microscopic surface of bird feathers, a larger airflow can be generated under the action of the fan, so that the materials on the screen surface are more dispersed, and at the same time, it is convenient to move backwards and improve the cleaning efficiency. , to complete high-quality, high-efficiency cleaning operations.

Description

Fan-driven corn cleaning mechanism with bird feather imitating surface structure

Technical Field

The invention belongs to agricultural machinery, and mainly relates to a fanning type corn cleaning mechanism with a bird feather imitating surface structure.

Background

At present, a cleaning device is a key part of a corn kernel combine harvester, the structure and the performance of the cleaning device directly influence the cleaning effect of corn kernels, and the air-screen type cleaning device is most widely applied. The air screen type cleaning device utilizes high-speed airflow generated by a fan to disperse the corn mixture and take away part of light impurities. Traditional maize shale shaker sifter structurally has not enough, and simultaneously under the air current effect that centrifugal fan produced, there is the phenomenon that the wind speed is little and the maldistribution in wind on the sifter, and then leads to can not make the mixture fully dispersed, is unfavorable for the backward propelling movement of material to the loss rate increases, cleans the not good scheduling problem of effect. Meanwhile, the traditional vibrating screen has a single motion direction, the surface of the screen body is flat, the phenomenon that material particles are accumulated and block screen holes easily occurs on the screen surface, and the grain screening effect is poor and the operation efficiency is low during the cleaning operation.

Disclosure of Invention

The invention aims to research and develop a fan-driven corn cleaning mechanism with a bird feather-like surface structure aiming at the problems of poor cleaning effect, over-low airflow speed of airflow generated by a fan on a screen surface and accumulation of materials on the screen surface, thereby achieving the purpose of improving the cleaning operation efficiency of grains.

The purpose of the invention is realized as follows: a bearing seat is fixedly installed on a side column of the rack, a transmission shaft is installed in the bearing seat, a bevel gear 1 is fixedly installed at one end of the transmission shaft, the drive shaft is driven by a motor (not shown in the figure), and bevel gears 2 are fixedly installed at two ends of the drive shaft, so that the transmission shaft is driven by the drive shaft to rotate along with the drive shaft through bevel gear transmission, and meanwhile, a cam is installed on the transmission shaft and also rotates along with the transmission shaft. The screen surface 1 and the screen surface 2 are provided with holes with the diameters consistent with the diameters of the long shafts and hinged together through the long shafts, the two ends of the long shafts are fixedly connected to the rack, the screen surface 1 and the screen surface 2 can rotate around the long shafts, and the lower surfaces of the screen surfaces are arranged in a tangent mode with the cams. The upper end of the telescopic rod is fixedly connected to the rack, and the spring is arranged on the telescopic rod. Under the rotation of the cam, the screen surface 1 and the screen surface 2 can swing up and down around the long shaft to do movement similar to the flapping wings of birds, and meanwhile, the telescopic rod and the spring can ensure that the screen surface can swing downwards again under the action of the spring after swinging upwards. The screen surface 1 and the screen surface 2 are provided with w-shaped bulges consistent with the microstructure of the surface of the bird feather, and the front end and the rear end of the screen surface are provided with front edge bulges and rear edge bulges consistent with the wing structure of the bird. Here, the "w" shape of the surface of the feathers of the birds and the projections on the front and rear edges of the wings of the birds have drag reducing effects. The screen surface 1 and the screen surface 2 continuously realize swinging motion under the action of the driving shaft, and the screen surface moves to form a motion form similar to the flapping wings of birds.

According to the characteristics of the microstructure on the surface of the feather of the birds, the vibrating screen is designed according to the flying motion form of the birds, the dispersion degree of corn threshing materials on the screen surface is improved, and the air velocity on the screen surface is improved. When the corn cleaning operation is carried out, the air flow generated on the screen surface by the fan enables corn materials to be more dispersed, simultaneously reduces the problem of accumulation of corn threshed objects on the screen surface, improves the feeding amount, and has the characteristics of novel and reasonable structure, high cleaning operation efficiency, good quality and reliable use.

Drawings

FIG. 1 is a schematic view of the general structure of a fan-type bird feather surface-imitating corn cleaning mechanism;

FIG. 2 is a schematic view of the general structure of a fan-type bird feather surface structure corn cleaning mechanism with a hidden part of a frame;

figure 3 is an isometric view of the screening surface 1;

figure 4 is a front view of the screening surface 1;

figure 5 is a front view of the screening surface 2;

FIG. 6 is a cam;

FIG. 7 is a telescoping rod;

description of part numbers in the figures:

1. frame, 2, spring, 3, telescopic link, 4, cam, 5, transmission shaft, 6, bearing frame, 7, bevel gear 1, 8, bevel gear 2, 9, drive shaft, 10, grain collecting bin, 11, belt pulley, 12, major axis, 13, screening surface 1, 14,

screening surface

2, 15, hole.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The bearing seat (6) is fixedly installed on a side column of the rack (1), the transmission shaft (5) is installed in the bearing seat (6), the bevel gear 1(7) is fixedly installed at one end of the transmission shaft (5), the driving shaft (9) is driven by the motor (not shown in the figure), and the bevel gear 2(8) is fixedly installed at two ends of the driving shaft (9), so that the transmission shaft (5) rotates along with the driving shaft (9) through bevel gear transmission under the driving of the driving shaft (9), the cam (4) is installed on the transmission shaft (5), and the cam (4) also rotates along with the transmission shaft (5). The

screen surfaces

1, 13 and 2, 14 are provided with long holes (15) with the diameter consistent with that of the long shaft (12) and hinged together through the long shaft (12), two ends of the long shaft (12) are fixedly connected on the frame (1), the

screen surfaces

1, 13 and 2, 14 can only rotate around the long shaft (12), and the lower surfaces of the screen surfaces are tangential to the cams (4). The upper end of the telescopic rod (3) is fixedly connected to the rack (1), and the spring (2) is arranged on the telescopic rod (3). Under the rotation of the cam (4), the screen surfaces 1 and 13 and the

screen surfaces

2 and 14 swing up and down around the long shaft (12) to do movement similar to the flapping wings of birds, and meanwhile, the telescopic rod (3) and the spring (2) can ensure that the screen surfaces can swing down again under the action of the spring (2) after swinging up. Meanwhile, w-shaped bulges consistent with the microstructure of the surface of the bird feather are processed on the screen surface (13) and the screen surface (14), and front and rear edge bulges consistent with the structure of the bird wing are processed at the front end and the rear end of the screen surface. Here, the "w" shape of the surface of the feathers of the birds and the projections on the front and rear edges of the wings of the birds have drag reducing effects. The

screen surfaces

1 and 2 and 14 continuously realize swinging motion under the action of the driving shaft (9), and the screen surface motion forms a motion form similar to the flapping wings of birds.

In operation, under the driving of the motor (not shown in the figure), the belt pulley (11) drives the driving shaft (9) to rotate, the driving shaft (9) drives the transmission shaft (5) to rotate through the bevel gears 2(8) and the bevel gears 1(7), and further the cam (4) rotates under the action of the motor. The screen surface 1(13) is hinged with the screen surface 2(14) through the long shaft (12), the screen surface 1(13) and the screen surface 2(14) can rotate around the long shaft (12), the long shaft (12) is fixed on the rack (1), so that under the action of the cam (4), the spring (2) and the telescopic rod (3), the left end of the screen sheet 1(13) swings in an arc shape by taking the long shaft (12) as a circle center, and the right end of the screen surface 1(13) rotates around the long shaft (12) to perform movement similar to flapping wings of birds. The movement pattern of the screen surfaces 2(14) is similar to that of the screen surfaces 1 (13). The accumulation of corn threshing materials on the sieve surface is reduced, the feeding amount is increased, and the materials on the sieve surface are pushed backwards under the action of larger air flow generated by the fan. The cleaning operation with high quality and high efficiency is completed.

Claims

1. a corn cleaning mechanism of fan-type imitation bird feather surface structure is characterized in that: the bearing seat (6) is fixedly installed on the side column of the frame (1), and the drive shaft (5) is installed in the bearing seat (6). ), the bevel gear 1 (7) is fixedly installed at one end of the transmission shaft (5), the drive shaft (9) is driven by a motor (not shown in the figure), and the bevel gear 2 (8) is fixedly installed at both ends of the drive shaft (9). The drive shaft (5) is driven by the drive shaft (9) to rotate the drive shaft (5) with the drive shaft (9) through a bevel gear drive, and a cam (4) is installed on the drive shaft (5), and the cam (4) also rotates. With the rotation of the transmission shaft (5), the screen surface 1 (13) and the screen surface 2 (14) are provided with holes (15) with the same diameter as the long axis (12), and are hinged together through the long axis (12), the long Both ends of the shaft (12) are fixed on the frame (1), the screen surface 1 (13) and the screen surface 2 (14) can only rotate around the long axis (12), and the lower surface of the screen surface is tangent to the cam (4) Place, the upper end of the telescopic rod (3) is fixed on the frame (1), and the spring (2) is installed on the telescopic rod (3). 2 (14) swings around the long axis (12) in an up and down arc, making a movement similar to that of a bird flapping its wings. At the same time, the telescopic rod (3) and the spring (2) can ensure that the screen surface can be swung upwards and can be acted on by the spring (2). Under the force, the screen surface is swung downward again, and the "w"-shaped protrusions are processed on the screen surface 1 (13) and the screen surface 2 (14), which are consistent with the microstructure of the bird feather surface. The front and rear edges of the bird's wings have the same structure. Here, the "w" shape of the bird's feather surface and the front and rear edge of the bird's wings have a drag reduction effect. Screen surface 1 (13) and screen surface 2 (14) ) under the action of the drive shaft (9) continuously realizes the swing movement, and the movement of the screen surface forms a movement form similar to that of a bird flapping its wings.