CN2466885Y - Axial-flow cone drum type threshing machine - Google Patents

Abstract

The utility model relates to an axial-flow conical roller type threshing machine which is suitable for being used on a combine harvester for harvesting paddy rice, wheat, etc. The utility model is composed of a conical threshing roller, an escape grid, a top cover and a guide plate, wherein, the conical roller is provided with a large discharging port end and a small feeding port end, and a threshing gap formed by the conical roller and the escape grid is provided with a large feeding port end and a small discharging port end, which is more suitable for the characteristics of a crop threshing process. Thus, the utility model has the advantages of gentle threshing, less power consumption, low crashing ratio, less loss, etc.

Description

Axial flow awl drum threshing device

The utility model relates to a kind of axial flow awl drum threshing device, is adapted to gather on the combine of paddy rice, wheat use.

The axial flow cylinder-type sheller unit mainly is made up of parts such as cylinder, concave grate, top cover and guide plates.Two kinds of forms are arranged: a kind of is that rotatingcylindrical drum, circular arc concave grate, guide plate and arc top cover are formed the cylindrical threshing chamber of the enclosed type from the feeding mouth to the outlet, during the cylinder rotation, make by the guide plate that is installed in cylinder top top cover inwall and to be taken off crop and do axial flow, because it is simple in structure, be convenient to make, the threshing performance can meet the demands substantially, is extensively adopted by various combines.Its weak point is the power consumption height, as feeds inequality and also may result in blockage.Another kind is a conical threshing chamber of the enclosed type of discharging from the small end feeding from big end of being made up of scroll drum, band with matching awl arc top cover, cylinder rotation produces the axial thrust load that points to stub end by cone angle and makes and taken off crop and make axial flow from the feeding mouth of small end to the outlet of big end.The axial thrust load of the big more sensing stub end of cone angle is big more, and it is mobile smooth more that quilt is taken off crop, and cone angle is generally 10 °～15 °.Because the manufacturing process more complicated is not seen use on the combine at home at present.

The purpose of this utility model is; At above-mentioned deficiency, provide a kind of axial flow rational in infrastructure, that power consumption is little, entrainment loss is little, percentage of damage is low, cleannes are high to bore drum threshing device.

The utility model is achieved in that it is made up of cylinder, concave grate, top cover and guide plate, and cylinder is that the feeding mouth end is little, the conical drum that the outlet end is big.

The optimum taper angle β of conical drum is 0.5 °～8 °.

The wrap angle sigma of concave grate is preferably 240 °～300 °.

The height of guide plate also is preferably feeding mouth end height, and the outlet end is low.

Description of drawings:

Fig. 1 is the partial sectional view of the utility model front view.

Fig. 2 is A-A cutaway view of Fig. 1.

1. conical drum 2. concave grates 3. top covers 4. guide plates 5. feeding mouths

6. outlet

Now illustrate in detail with regard to structure of the present utility model and operation principle in conjunction with the accompanying drawings:

The utility model is made up of cylinder 1, concave grate 2, top cover 3, guide plate 4, guide plate 4 is installed in the inwall of cylinder 1 top top cover 3, concave grate 2 and top cover 3 are formed a columniform outer courage, and it is basic identical with the concave grate and the top cover profile of the grain header that uses now.Cylinder 1 is a conical drum; crop is entered by the small end feeding mouth 5 of cylinder; discharge from big end outlet 6; roll circumference speed increases vertically gradually; more can adapt to the requirement of crop threshing characteristic; crop enters and is attached to concave grate 2 surface and top cover 3 surfaces from feeding mouth 5 during threshing; under the axial thrust load of cylinder cone angle generation sensing stub end pushes jointly with the guide plate 4 that is installed in cylinder 1 top; work is towards the spiral axially-movable of outlet 6; seed; the grain husk shell; broken straw; seed mixtures such as broken leaf are fallen by the notch board sieve aperture under the cylinder action of centrifugal force, and remaining straw grass is then outside the outlet 6 discharge machines of cylinder tail end.Because cylinder 1 is a conical drum, and concave grate and top cover still are the arc-shaped surface that cooperatively interacts, the cylinder-concave clearance at the feeding mouth place of this device than the cylinder-concave clearance at outlet place more greatly, the crop threshing then begins to stop to the outlet place from feeding mouth, the volume of crop is reduced to the outlet place gradually by the feeding mouth place, just in time and the gap between threshing cylinder and the concave grate be complementary, under the prerequisite that guarantees abundant threshing, take off softlyer, more even than traditional axial flow cylinder-type sheller unit, simultaneously straw more complete (both broken straw rod had reduced a bit).Its result must be that the power consumption of threshing can reduce, injured seed reduces, cleannes also can improve.

Since the threshing cylinder long (generally more than 1m) that combine uses, so the cone angle beta of cylinder 1 should not be too big, the best is 0.5 °～8 °, cylinder can be an open type, also can be enclosed; Cone angle beta can be got the whole process of cylinder, also can get the partial journey of cylinder; The β angle both can be the angle of cylinder bus and axis, also can be the top line of threshing tooth and the angle of axis.When β gets higher value, the height the pick of of guide plate 4 (polylith is generally arranged) or all to be designed to entrance point high, the port of export hangs down.Thereby avoid causing that because of guide plate excesssive gap between feeding mouth end and conical drum the crop axial flow is not smooth.

The wrap angle sigma of the concave grate on the at present domestic combine is all less than 240 °, and for the trafficability characteristic, the minimizing entrainment loss that improve seed, the most simple and effective way is to increase its wrap angle sigma.The wrap angle sigma of this device is preferably between 240 °～300 °.

Because it is different to the utlity model has above-mentioned from existing harvester axial flow cylinder-type sheller unit Feature, more adapt to the crop threshing characteristic requirements such as paddy rice, wheat, have more reasonable structure, merit Consume little, entrainment loss is little, percentage of damage is low, the cleannes advantages of higher.

Claims (4)

1. an axial flow awl drum threshing device comprises cylinder 1, concave grate 2, top cover 3, guide plate 4, it is characterized in that cylinder 1 is little for the feeding mouth end, the conical drum that the outlet end is big.

2. sheller unit as claimed in claim 1, the tapering β that it is characterized in that cylinder 1 are 05 °～8 °.

3. sheller unit as claimed in claim 1 or 2, the height that it is characterized in that guide plate 4 is a feeding mouth end height, the outlet end is low.

4. sheller unit as claimed in claim 1 or 2, the wrap angle sigma that it is characterized in that concave grate are 240 °～300 °.

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