CN201640018U

CN201640018U - High-purification-rate corn thresher

Info

Publication number: CN201640018U
Application number: CN2010203018220U
Authority: CN
Inventors: 袁国斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-28
Filing date: 2010-01-28
Publication date: 2010-11-24
Anticipated expiration: 2020-01-28

Abstract

The utility model relates to an agricultural machine, in particular to a high-purification-rate corn thresher, comprising power transmission mechanisms, a threshing mechanism, a conveying mechanism, an impurity removing mechanism and a machine frame. The high-purification-rate corn thresher is characterized in that the surface of a roller with screening holes is distributed with a plurality of bosses; the power transmission mechanisms are positioned at the two sides of the machine frame; the conveying mechanism comprises an auger and an elevator, the auger is positioned at the lower side of the machine frame, and the elevator is positioned at one side of the machine frame; the threshing mechanism and the impurity removing mechanism are fixed on the machine frame; and the roller of the threshing mechanism is provided with the screening holes, and the longitudinal length of the screening hole is longer than the horizontal length thereof. The high-efficiency corn thresher has high threshing efficiency and high purity for dried corn with skins and wet corn with skins, also has simple structure and can be matched and combined with any power source for use.

Description

A kind of husker sheller of high purifying rate

Technical field

The utility model relates to agricultural machinery, particularly a kind of husker sheller of high purifying rate.

Background technology

Though known patent 02145589.9 husker sheller threshing cleanliness height; but because it is slow to go out a separating rate; so production efficiency is lower; and former patent relatively is fit to belt leather or the not dried corn threshing of belt leather and the not threshing of belt leather wet corn; wet corn threshing separation rate for belt leather; the cleanliness rate is all influential; former type can only be exported by lace power; type after the improvement can connect power outputs such as PTO; simultaneously also to the spike-tooth of former type; concave grate; master roller; sieve aperture improves; improve production efficiency more, also increased preceding movable slide plate; back fixed glides and trifilar suspension seat.

Summary of the invention

The purpose of this utility model is: a kind of husker sheller of high purifying rate is provided, and it is not only to the dried corn of belt leather, and to threshing efficiency height, the cleanliness height and simple in structure of belt leather wet corn, can with the use that forms a complete set of of any power source.

The technical scheme that its technical problem that solves the utility model adopts is: the husker sheller that designs a kind of high purifying rate; it comprises power drive mechanism, separating mechanism, conveying mechanism, impurity-removing mechanism and frame five major parts, it is characterized in that: the roller inner surface that its separating mechanism has sieve aperture is distributed with a plurality of projectioies.

Described power drive mechanism is positioned at the frame both sides, and conveying mechanism comprises pusher and elevator, and pusher is positioned at the frame downside, and elevator is positioned at frame one side, and separating mechanism and impurity-removing mechanism are fixed on the frame.

On the roller of described separating mechanism sieve aperture is arranged, vertical ratio of sieve aperture is laterally long.

Described power drive mechanism inserts spindle nose by power and power access wheel constitutes, and when power access spindle nose was the power access point, power access spindle nose and power output PTO or diesel engine or motor were in transmission connection; When power inserted wheel for the power access point, power inserted wheel and diesel engine or motor and is in transmission connection.

Described separating mechanism is made of home roll, secondary roller fixing in master roller, secondary roller and master roller, the secondary roller, master roller is connected and composed by master roller concave grate and master roller notch board lid, secondary roller is connected and composed by secondary roller concave grate and secondary roller notch board lid, one end of master roller is communicated with by an end of passage concave grate and secondary roller, and the through hole between master roller and the secondary roller is tightly connected by conduit wall and seals; Master roller, secondary roller two ends are on body; The inner surface of master roller concave grate, secondary roller concave grate and passage concave grate has projection.

Be distributed with spike-tooth on described home roll, the secondary roller, the distribution of spike-tooth on roller is the single head helix from first tooth to a last tooth.

Described sieve aperture is rectangle or ellipse, each sieve aperture shape, measure-alike or different.

Described spike-tooth is made of tooth post and tooth tail, and tooth capital end has the tooth tail, and tooth post cross section is circular, and tooth tail cross section is a rectangle, and the angle of tooth post and tooth tail is chosen in the 70-85 degree.

Described impurity-removing mechanism is made of blower fan, master roller concave grate, secondary roller concave grate, tail skid and front slide, and front slide is movable grafting slide plate.

Described frame is made of body, support and trifilar suspension seat, and the trifilar suspension seat is connected with the three point linkage of rear tractor.

Main feature of the present utility model is: vertical ratio of sieve aperture is laterally long, for rectangle or oval can increase flux under the situation that guarantees out a quality; The power that increases in addition inserts spindle nose and can directly be connected with power output such as PTO, has increased the kind of power input; Spike-tooth is that the single head helix is better than multi-head spiral line continuity, is convenient to advance, and propulsive force is big, and spike-tooth is arranged evenly on roller, is convenient to processing; The projection of the concave grate that increases promptly increases collision, improves the threshing quality, plays the effect of the intensity of strengthening concave grate simultaneously; Master roller is that oval-shaped purpose is so that charging is smooth; Tooth tail cross section is that the spike-tooth of rectangle is stronger for circular spike-tooth drive than tooth tail cross section, thereby propulsive force is strong, and cylindrical do not have the spike-tooth of tooth tail to skid easily, cause propulsive force little, the angle of tooth post and tooth tail is the 70-85 degree, can make disengaging effective, and the disengaging resistance is little; Front slide is that activity disconnects slide plate, detachable back cleaning dirt; The trifilar suspension seat can directly articulate with the tractor three-point attachment, with the tractor use of band PTO interface, installation, convenient disassembly, the problem that has needed the technical staff to be welded to connect before having solved.

This patent is the improvement type of former patent 02145589.9 husker sheller; former type can only be exported by lace power; type after the improvement can connect power outputs such as PTO; also spike-tooth, concave grate, master roller, the sieve aperture of former type improved simultaneously; improve production efficiency more, also increased preceding movable slide plate, back fixed glides and trifilar suspension seat.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described further.

Fig. 1 is the thresher structural representation.

Fig. 2 is major-minor roller and channel design schematic diagram.

Fig. 3 is the housing construction schematic diagram.

Fig. 4 is the complete machine perspective view.

Fig. 5 is the spike-tooth structural representation.

Fig. 6 is spike-tooth direction and roller rotation direction schematic diagram.

Fig. 7 is that spike-tooth is single head helix distribution schematic diagram.

Fig. 8 is a sieve aperture shape schematic diagram to Figure 11.

Among the figure: 1, feed hopper; 2, master roller; 3, secondary roller; 4, throw assorted mechanism; 5, blower fan; 6, pusher; 7, elevator; 8, home roll; 9, secondary roller; 10, power inserts spindle nose; 11, tail skid; 12, front slide; 13, power inserts wheel; 14, major and minor roller passage; 15, spike-tooth; 16, sieve aperture; 17, material casting plate; 18, throw assorted plate; 19, projection; 20, master roller concave grate; 21, secondary roller concave grate; 22, passage concave grate; 23, body; 24, support; 25, trifilar suspension seat; 26, conduit wall; 27, master roller notch board lid; 28, secondary roller notch board lid.

Embodiment

Embodiment 1: its power drive mechanism, separating mechanism, conveying mechanism, impurity-removing mechanism and frame five most of structures and this five part annexation each other are similar substantially to known technology; or it is basic identical with the patent No. 02145589.9 husker sheller structure; sieve aperture 16 is arranged on the roller of separating mechanism of different it; vertical ratio of sieve aperture 16 is laterally long, and the length and width ratio is 1.1: 1 to 5: 1.Guaranteeing out like this increases flux under the situation of a quality.The patent No. 02145589.9 husker sheller is easily by obstruction grizzly bar sieve apertures such as corn bud skins.The roller inner surface that has sieve aperture 16 is evenly distributed with a plurality of protruding 19.

Embodiment 2: substantially the same manner as Example 1, different is its power drive mechanism inserts spindle nose 10 and power by power and inserts wheel 13 and constitute, when power access spindle nose 10 was the power access point, power access spindle nose 10 was exported PTO or diesel engine or motor with power and is in transmission connection; When power access wheel 13 was the power access point, power inserted wheel 13 and is in transmission connection with diesel engine or motor.

Embodiment 3: also basic identical with embodiment 1, different is that the spike-tooth 15 that distributes on home roll 8 and the secondary roller 9 is made of tooth post and tooth tail, and tooth capital end has the tooth tail, and tooth post cross section is circular, tooth tail cross section is a rectangle, and the angle of tooth post and tooth tail is chosen in the 70-85 degree.

Embodiment 4: also basic identical with embodiment 1, different is, and its impurity-removing mechanism is made of blower fan 5, master roller concave grate 20, secondary roller concave grate 21, tail skid 11 and front slide 12, and front slide 12 is movable grafting slide plate.

Embodiment 5: also basic identical with embodiment 1, different is, and its frame is made of body 23, support 24 and trifilar suspension seat 25, and trifilar suspension seat 25 is connected with the three point linkage of rear tractor.

Embodiment 6: power drive mechanism is made of power access spindle nose 10 and power access wheel 13 on embodiment 1 basis, when power access spindle nose 10 is the power access point, power access spindle nose 10 is exported PTO or diesel engine or motor with power and is in transmission connection, and PTO is the power output of tractor; When power access wheel 13 was the power access point, power inserted wheel 13 and is in transmission connection with diesel engine or motor, had increased the kind that power is imported; The distribution of spike-tooth 15 on home roll 8, secondary roller 9 is the single head helix from first tooth to a last tooth, spike-tooth 15 is that the single head helix is better than multi-head spiral line continuity, is convenient to advance, and propulsive force is big, and spike-tooth 15 is arranged evenly on home roll 8, secondary roller 9, is convenient to processing; The inner surface of master roller concave grate 20, secondary roller concave grate 21 and passage concave grate 22 has projection 19, increases projection 19 and has promptly increased collision, improves the threshing quality, plays the effect of strengthening concave grate intensity simultaneously; Master roller 2 is by master roller concave grate 20 and master roller notch board lid 27 welds or bolt connects and composes, and is ellipse, and major axis is on transverse axis, and oval-shaped purpose is so that charging is smooth; Spike-tooth 15 is made of tooth post and tooth tail, tooth capital end has the tooth tail, tooth post cross section is circular, tooth tail cross section is that the spike-tooth of rectangle is stronger for circular spike-tooth drive than tooth tail cross section, thereby propulsive force is strong, and cylindrical do not have the spike-tooth of tooth tail to skid easily, cause propulsive force little, the angle of tooth post and tooth tail is the 70-85 degree, can make disengaging effective, and the disengaging resistance is little.Impurity-removing mechanism is made of blower fan 5, tail skid 11 and front slide 12, and front slide 12 is movable grafting slide plate, detachable back cleaning dirt; Frame is made of body 23, support 24 and trifilar suspension seat 25, trifilar suspension seat 25 directly articulates with the three point linkage of rear tractor, use installation, convenient disassembly, the problem that has needed the technical staff to be welded to connect before having solved with the tractor of band PTO interface.

Embodiment 7: following connected mode is a syndeton between each parts under the PTO power way of output; charging aperture with feed hopper 1 is an interarea; this corn threshing device comprises power drive mechanism, separating mechanism, conveying mechanism, impurity-removing mechanism and frame five major parts; power drive mechanism is positioned at the frame both sides; conveying mechanism comprises pusher 6 and elevator 7; pusher 6 is positioned at the frame downside; elevator 7 is positioned at the frame right side; separating mechanism and impurity-removing mechanism are fixed on the frame, and separating mechanism is positioned at the impurity-removing mechanism top.

Described power drive mechanism comprises that power inserts spindle nose 10 and power inserts wheel 13; separating mechanism comprises feed hopper 1; master roller 2; secondary roller 3; home roll 8; secondary roller 9; main; secondary roller passage 14; spike-tooth 15; material casting plate 17; projection 19; master roller concave grate 20; secondary roller concave grate 21; passage concave grate 22; conduit wall 26; master roller notch board lid 27 and secondary roller notch board lid 28; conveying mechanism comprises pusher 6; elevator 7; impurity-removing mechanism comprises throws assorted mechanism 4; blower fan 5; tail skid 11 and front slide 12; throw assorted plate 18, frame comprises body 23; support 24 and trifilar suspension seat 25.

As shown in figures 1 and 3, power inserts spindle nose 10 and is connected with an end of home roll 8 by belt, the other end of home roll 8 and power insert wheel 13 and are in transmission connection, power inserts wheel 13 and is connected with blower fan 5 with secondary roller 9 by belt, the spindle nose of power access simultaneously 10 passes through axle and is connected with an end of pusher 6, and the other end of pusher 6 is connected with the driving-chain of elevator 7; Master roller 2 is fixed on the back upper place of blower fan 5, secondary roller 3 be fixed on blower fan 5 directly over, secondary roller 3 is than master roller 2 height, feed hopper 1 is on the upper left side of master roller 2 and secondary roller 3, major and minor roller passage 14 is at the right-hand member of master roller 2 and secondary roller 3; Major and minor roller passage 14 is fixed on the right plate of body 23 and the right section of support 24 central sills, home roll 8 master roller 2 of packing into, two ends are by bearing respectively fixedly on the left side plate of body 23, material casting plate 17 is fixed on the surface of home roll 8, near right-hand member, and the secondary roller 9 secondary roller 3 of packing into, one end by bearing fixing on the right plate of body 23, the other end on the end cap of throwing assorted mechanism 4, is thrown the surface that assorted plate 18 is fixed on secondary roller 9, near left end by bearing fixing; Spike-tooth 15 is separately fixed at the surface of home roll 8 and secondary roller 9, and the spike-tooth 15 that is fixed on above the home roll 8 is axially vertical, the top along home roll 8 radially, deflection 535 degree counterclockwise; The spike-tooth 15 that is fixed on above the secondary roller 9 is axially vertical, the top along secondary roller 9 radially, deflection 5-35 degree clockwise; Pusher 6 is blower fan 5 under the front slide 12 under tail skid 11 and front slide 12, the two ends of pusher 6 and the welding of body 23 left side plates; Elevator 7 is in the right outside of body 23, and left side, the lower end inlet of elevator 7 is connected with anchor ear with the right-hand member outlet of pusher 6; Front slide 12 is under secondary roller 3, tail skid 11 is under master roller 2, tail skid 11 is lower than front slide 12, blower fan 5 is under front slide 12, be inserted into the inboard chute of left side plate of body 23 before the front slide 12 behind the height, front slide 12 is movable slide plate, detachably is convenient to clear up dirt, and tail skid 11 is inboard fixing with bolt and body 23 left side plates with low early and high after two ends;

As shown in Figures 2 and 3, the left end of master roller notch board lid 27 is welded on the intermediate plate of body 23, and the right-hand member of master roller notch board lid 27 is welded on the right plate of body 23, and the both sides, front and back of master roller notch board lid 27 are welded on respectively on the back rest and central sill of body 23; The left end of master roller concave grate 20 is fixed on the left plate of body 23, the right-hand member of master roller concave grate 20 is fixed on the rear arc limit of the left back end of passage concave grate 22 and conduit wall 26, the both sides, front and back of master roller concave grate 20 are fixed with the back rest and the central sill of body 23 respectively, with welding or bolt; Secondary roller notch board cover two ends, 28 left and right sides respectively with the left side plate welding of body 23, the both sides, front and back of secondary roller notch board lid 28 respectively with front-axle beam and central sill welding; The left end of secondary roller concave grate 21 and the left plate of body 23 weld or use bolt, the right-hand member back segment of secondary roller concave grate 21 and the front arc side weld of conduit wall 26 connect, the right-hand member leading portion of secondary roller concave grate 21 and the welding of passage concave grate 22 left end leading portions, the both sides, front and back of secondary roller concave grate 21 weld or use bolt with the front-axle beam central sill of body 23 respectively; The left end middle part welding of the lower end of conduit wall 26 and passage concave grate 22, the central sill welding or the bolt of the upper end of conduit wall 26 and body 23, the front arc limit of conduit wall 26 and the welding of the right-hand member rear portion of secondary roller concave grate 21, the anterior welding of the rear arc limit of conduit wall 26 and the right-hand member of master roller concave grate 20; The right plate of the right-hand member of passage concave grate 22 and body 23 welds or uses bolt, and the front-axle beam of the front of passage concave grate 22 and body 23 welds or use bolt.The back rest of the back of passage concave grate 22 and body 23 welds or uses bolt; Projection 19 is inner surface projectioies of master roller concave grate 20, secondary roller concave grate 21, passage concave grate 22, increases projection 19 and promptly increases collision, improves the threshing quality, plays the intensity effect of strengthening concave grate simultaneously; Master roller concave grate 20 and master roller notch board lid 27 connect and compose master roller 2, are ellipse, and major axis is on transverse axis, and oval-shaped purpose is so that charging is smooth.The right section of the right section of master roller notch board lid 27, secondary roller notch board lid 28, conduit wall 26, passage concave grate 22 constitute major and minor roller passage 14.

Shown in Fig. 3 housing construction schematic diagram, body 23 is made of left plate, right plate, intermediate plate, front-axle beam, central sill and the back rest, and left baffle and front-axle beam, central sill, the back rest are welded, and middle baffle plate is welded in front-axle beam, central sill, top, back rest middle part; Support 24 is in the upper right side of body 23, the intermediate plate welded top of the left end of support 24 and body 23, and the right plate welded top of right section in the bottom of support 24 and body 23, align with the middle plate of body 23 and the relief angle of right plate in the back of support 24; 25 two left-external side bottoms at body 23 of trifilar suspension seat are fixed for two jiaos, and another is in the left-external side top of body 23 center fixed.

As Fig. 4 complete machine perspective view and shown in Figure 3, the left side, lower end of feed hopper 1 is with the welding of body 23 left plate tops or use bolt, the middle plate of the right side, lower end of feed hopper 1 and body 23 welds or uses bolt, bolt is welded or used to the left section of the front, lower end of feed hopper 1 and the central sill of body 23, and bolt is welded or used to the back, lower end of feed hopper 1 and the back rest of body 23 left side section.The middle part of elevator 7 and support 24 are used bolt.

Spike-tooth structural representation as shown in Figure 5, spike-tooth 15 is made of steel, and spike-tooth 15 is made of tooth post and tooth tail, and tooth capital end has the tooth tail, tooth post cross section is circular, tooth tail cross section is that the spike-tooth of rectangle is stronger for circular spike-tooth drive than tooth tail cross section, thereby propulsive force is strong, and cylindrical do not have the spike-tooth of tooth tail to skid easily, cause propulsive force little, the angle of tooth post and tooth tail is the 70-85 degree, can make disengaging effective, and the disengaging resistance is little.

The tooth tail overbending direction and the roller direction of rotation of spike-tooth shown in Fig. 6 spike-tooth direction and roller rotation direction schematic diagram.

Spike-tooth 15 is single head helix distribution schematic diagram as shown in Figure 7, and the distribution of spike-tooth on roller is the single head helix from first tooth to a last tooth, and the single head helix is better than multi-head spiral line continuity, be convenient to advance, propulsive force is big, and spike-tooth is arranged evenly on roller, is convenient to processing; The thresher spike-tooth is made of a steel, and tooth capital end has the tooth tail, and tooth post bottom is welded on the roll shaft surface, makes spike-tooth 15 top-side form the propelling angle of 5 degree to 35 degree along the roll shaft warp-wise.Evidence is when advancing the angle less than 5 degree, when threshing has the corn ear of luxuriant skin; the not enough work efficiency of propulsive force is low; when advancing the angle greater than 35 degree, fltting speed is too fast, the formation threshing is clean, make a large amount of seeds confuse assorted surplus (matter) discharges thresher, causes thresher to run grain.

As Fig. 8-sieve aperture shape schematic diagram shown in Figure 11, vertical ratio of sieve aperture 16 is laterally long, be the roll shaft rotation direction vertically, sieve aperture 16 can be rectangle and also can be ellipse, each sieve aperture put in order can be identical also can be different, Fig. 8 and Figure 11 are oval sieve aperture 16 schematic diagrames, wherein Fig. 9 is the longitudinal separation systematic arrangement, Figure 11 is that vertically straight preface is arranged, and Fig. 9 is rectangle sieve aperture 16 schematic diagrames, and Figure 10 is the round sieve 16 of original technology.

Its operating process: power source (PTO of tractor etc.) inserts power and inserts spindle nose 10, power inserts 10 fens two-way of spindle nose, the belt of leading up to drives home roll 8, the other end of home roll 8 and power insert wheel 13 and are in transmission connection, power inserts wheel 13 and drives secondary roller 9 and blower fan 5 by belt, another road drives pusher 6 by axle, and the other end of pusher 6 drives the driving-chain of elevator 7.

Threshing course: corn is poured feed hopper 1 into, flow into master roller 2, threshing to the right under spike-tooth 15 effect of home roll 8, arrive main, behind the secondary roller passage 14, under the effect of material casting plate 17, flow into secondary roller 3 again, further threshing with separate slag, the last assorted surplus assorted mechanism 4 of throwing that enters dishes out, seed is by master roller concave grate 20, secondary roller concave grate 21 and passage concave grate 22 fall into tail skid 11, front slide 12, iblet is by tail skid 11, the slit of front slide 12 forms and holds court from behind a screen, and iblet is held court from behind a screen and blown away impurity by blower fan 5 and fall into pusher 6, and pusher 6 is sent into elevator 7 to iblet, rise to certain altitude with elevator 7, send outside the machine.

This design forms through repetition test for many years, and it is simple in structure, does not need to add in addition screening plant, is equipped with that impurity content is less than 1% in the iblet after the cartridge type centrifugal blower can make threshing, and threshing performance is greater than 99.8%, and broken rate is less than 2%.Wide accommodation; The corn ear that adapts to different cultivars, different conditions (luxuriant skin, nothing bud skin, dried, high humidity are arranged), the normally threshing of water content 34% corn ear.The production efficiency height; Use the 11.3KW agricultural vehicle to join small-sized thresher and do experiment, threshing does not have the dried corn ear of skin, feed quantity per second 2.5KG, and test duration 40 hours, threshing has skin corn ear feed quantity per second 0.8KG, test duration 8 hours.Use 40 horsepowers of tractors to join medium-sized thresher, do not have the skin corn ear with the threshing of doing experiment of 60% power, water content 30%, the feed quantity per second is greater than 4KG, test duration 8 hours.Performance accommodation is big, and performance is better than present thresher.

Claims

1. the husker sheller of a high purifying rate; it comprises power drive mechanism, separating mechanism, conveying mechanism, impurity-removing mechanism and frame five major parts, it is characterized in that: the roller inner surface that its separating mechanism has sieve aperture (16) is distributed with a plurality of projectioies (19).

2. the husker sheller of a kind of high purifying rate according to claim 1; it is characterized in that: described power drive mechanism is positioned at the frame both sides; conveying mechanism comprises pusher (6) and elevator (7); pusher (6) is positioned at the frame downside; elevator (7) is positioned at frame one side, and separating mechanism and impurity-removing mechanism are fixed on the frame.

3. the husker sheller of a kind of high purifying rate according to claim 1, it is characterized in that: sieve aperture (16) is arranged on the roller of described separating mechanism, and vertical ratio of sieve aperture (16) is laterally long.

4. the husker sheller of a kind of high purifying rate according to claim 1, it is characterized in that: described power drive mechanism inserts spindle nose (10) by power and power inserts wheel (13) formation, when power access spindle nose (10) was the power access point, power access spindle nose (10) was exported PTO or diesel engine or motor with power and is in transmission connection; When power access wheel (13) was the power access point, power inserted wheel (13) and is in transmission connection with diesel engine or motor.

5. the husker sheller of a kind of high purifying rate according to claim 1, it is characterized in that: described separating mechanism is by master roller (2), secondary roller (3) and master roller (2), the home roll of fixing in the secondary roller (3) (8), secondary roller (9) constitutes, master roller (2) is connected and composed by master roller concave grate (20) and master roller notch board lid (27), secondary roller (3) is connected and composed by secondary roller concave grate (21) and secondary roller notch board lid (28), one end of master roller (2) is communicated with by an end of passage concave grate (22) and secondary roller (3), and the through hole between master roller (2) and the secondary roller (3) is tightly connected by conduit wall (26) and seals; Master roller (2), secondary roller (3) two ends are on body (23); The inner surface of master roller concave grate (20), secondary roller concave grate (21) and passage concave grate (22) has projection (19).

6. the husker sheller of a kind of high purifying rate according to claim 5, it is characterized in that: be distributed with spike-tooth (15) on described home roll (8), the secondary roller (9), the distribution of spike-tooth (15) on roller is the single head helix from first tooth to a last tooth.

7. the husker sheller of a kind of high purifying rate according to claim 1, it is characterized in that: described sieve aperture (16) is rectangle or ellipse, each sieve aperture (16) shape, measure-alike or different.

8. the husker sheller of a kind of high purifying rate according to claim 6, it is characterized in that: described spike-tooth (15) is made of tooth post and tooth tail, and tooth capital end has the tooth tail, and tooth post cross section is circular, and tooth tail cross section is Rectangle, the angle of tooth post and tooth tail is chosen in the 70-85 degree.

9. the husker sheller of a kind of high purifying rate according to claim 1; it is characterized in that: described impurity-removing mechanism is made of blower fan (5), master roller concave grate (20), secondary roller concave grate (21), tail skid (11) and front slide (12), and front slide (12) is movable grafting slide plate.

10. the husker sheller of a kind of high purifying rate according to claim 1; it is characterized in that: described frame is made of body (23), support (24) and trifilar suspension seat (25), and trifilar suspension seat (25) is connected with the three point linkage of rear tractor.