SU1722296A1 - Device for distribution of returns heap in cleaning unit of grain combine harvester - Google Patents

Abstract

The invention relates to agriculture and can be used in grain harvesters when harvesting various crops. The purpose of the invention is to reduce seed losses by uniformly distributing the spike heap across the width of the cleaning. The switchgear contains a screw 1, cantilevered located in a thresher with discharge vanes 3. The end of the casing with a discharge window 4 is designed as an expanding cone 5. The discharge vanes 3 are made with a variable height and equidistant surfaces of the cone 5. The discharge blades on the screw shaft are located along a screw lines with a pitch in the range from 3 5Ш to 4 5ш, where 5Ш a step of auger turns. The workflow is as follows. The heap, fed by the strip elevator, is processed by the breeder 7. The blades 3, capturing the heap particles, tell them different linear velocities and different directions of the velocity vector. The result is a better distribution of material across the width of the cleaning. 1 hp ff, 9 ill. fe

Description

The invention relates to agricultural machinery and can be used in combine harvesters when harvesting various crops.

The purpose of the invention is to reduce seed losses by improving the uniform distribution of the heap across the width of the cleaning.

Figure 1 shows a cylindrical distributor with a linear blade and a particle vanishing diagram from the blade; figure 2 is a cylindrical switchgear with a helical blade and a plot of the rate of descent of particles from the blade; on fig.Z - cone-shaped distribution device; in fig. 4 is a diagram of the vanishing of a particle from a blade of a cone-shaped distribution device; figure 5 - distribution of material across the width of the thresher with a cylindrical distributing device with a helical blade; figure 6 - distribution of material across the width of the thresher with a cone-shaped distribution device; Fig. 7 shows graphs of variation in the coefficient of uneven distribution of material across the width, depending on the screw rotation frequency for cylindrical (1) and cone-shaped (2) devices; 8 and 9 show the layout of the device.

A device for distributing the ear heap in the cleaning of a combine harvester includes a screw 1 located inside the casing 2. The output part of the screw 1 is equipped with an discharge vane 3, in the zone of which an discharge window 4 is made on the casing 2 The casing in the zone of the discharge blade 3 is made in the form of a cone 5 The auger is driven by an asterisk 6. In addition,

ABOUT

The device is equipped with a brewing device 7 and a rotor 8. The distribution device is installed near the left panel of the thresher of the combine 9 above the transport board 10, ending with a finger grid 11 located above the beginning of the upper sieve 12.

The discharge blades on the screw shaft are located in a helical line with a pitch that is in the range from 3 5x to 4 5c. When increasing the pitch of the outward-moving blades by 3-4 times (depending on the ratio of the pitch of the screw turns to its diameter), the axial velocity is equal to the circumferential creates conditions for the hauling of the heap along the entire length of the blades in front of the outflow window.

In the auger the speed of the material

along the axis Voc-en-- m / s, where S is the step of turns

screw; n - the number of revolutions of the screw per minute

circumferential speed at the edge of the screw W0kr

L d p

60

where D is the diameter of the screw.

D

For small screws 5Ш (0,8-1,0) О, of - 5Ш5Л p. l d p

(0.8 - 1.0) 60 60 After reducing 5 l l D.

When Sh3 0.8D 5l l

Sh3 about Q1 about Q-g-3,9i Lsh 4-8sh.

When Ss 1,00 / Vl -, 14Su

Zosh,

where 5sh pitch auger; Sn pitch of the scapula.

The device works as follows.

The heap coming from the bottom sieve of the combine harvester is fed by a grain elevator to a homemaking device 7, where the rotor 8 grinds the mass.

The treated heap is introduced into the threshing machine with a screw 1 to the blades 3 of the distributor. Each point of the blade (a, b, c) has a different linear velocity and a different direction of the velocity vector. Than

the farther it is from the axis of rotation, the greater the linear velocity of the particle from the blade. The blades 3, capturing the heap particles, tell them different linear velocities and different directions of the velocity vector. AT

Claims (2)

1. Device for the distribution of the ear heap in cleaning the harvesting a combine that includes a screw cantilever located in the threshing machine with an outflow window at the end of the auger housing, opposite which there are discharge vanes that are a continuation of the auger coil, characterized in that, in order to reduce seed losses by improving the uniform distribution of the heap across the width of the cleaning, the casing in the zone of the outflow window is designed as an expanding cone .. and the discharge vanes have a variable height and equidistant surfaces of the casing. 2. The device according to claim 1, wherein the discharge vanes on the screw shaft are located along a helical line with a pitch that is in the range from 3 to 45 °, where the pitch of the screw turns. Phi2.1 Coordinate irregularity / a a 8 s .ov 01 with about I "about -j go go to en 1 n % I g 00 J