CN102860182A - Tangential-longitudinal-flow threshing, separating and cleaning unit - Google Patents
Tangential-longitudinal-flow threshing, separating and cleaning unit Download PDFInfo
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Abstract
The invention relates to a tangential-longitudinal-flow threshing, separating and cleaning unit which comprises a tangential-longitudinal-flow double-drum threshing and separating device, a threshed grain conveyer, a dual-duct air-and-screen cleaning device, a kernel-and-residue conveyer, a transmission system and a frame. A tangential-flow threshing and separating device mainly comprises a tangential-flow threshing roller, a tangential-flow cavity plate and a tangential-flow top cover. A longitudinal-axial-flow threshing and separating device mainly comprises a longitudinal-axial-flow threshing drum, a conical guide hood, a longitudinal-axial-flow top cover and a longitudinal-axial-flow cavity plate. The threshed grain conveyer comprises a tangential-flow threshed grain shaker plate and a longitudinal-axial-flow threshed grain shaker plate. The dual-duct air-and-screen cleaning device comprises a dual-duct multi-blade axial-flow fan and a double-deck vibrating sieve. The kernel-and-residue conveyer comprises a residue screw, a secondary residue outlet and a kernel screw. The tangential-longitudinal-flow threshing, separating and cleaning unit can meet the harvesting requirement of crops for 3.5-7kg/s, such as rice, wheat, rape, barley, beans and the like, is capable of operating for 10-20 mu per hour, and is high in threshing and separating capacities, low in kernel loss rate and low in impurity rate.
Description
Technical field
The present invention relates to crops mechanical threshing cleaning plant manufacturing technology field, is a kind of vertical stream threshing separating cleaner of cutting concretely, can be widely used in gathering in the crops paddy rice, wheat, the high-performance results of rape, barley and beans etc.
Background technology
Along with crop varieties is constantly updated, output progressively improves; especially country encourages the appearance of the policies such as land right of use flows, the integration of fragmentation soil; China's modern agriculture large-scale production just progressively forms, and this Combine Harvester transaction capabilities and efficient are had higher requirement.
Tradition full feed type transverse-axis-flow combined harvester is subjected to the restriction of transverse machine bulk, and the ability of its core work parts threshing separation, cleaning plant obviously is restricted, and can't satisfy the growth requirement of China's combined harvester.The half-feed combine harvester that Kubo field, foreign horse, large equal Japan and Korea S company produce can not effectively solve the clamping that wide swath, high canopy bring and take out the difficult problems such as grass, threshing are clean, entrainment loss increases sharply, poor when larger when the fringe width of cloth, the results effect is more undesirable.
Full feed type is cut vertical stream combined harvester and is adopted advanced cutting to flow and longitudinal axial flow Combined threshing isolation technics, the threshing stroke is long, separating area is large, can be in the situation that do not increase body volume and boost productivity, threshing performance is high, percentage of damage is low, moist, difficulty is taken off crop adaptability good.
Chinese patent ZL 03250419.5 is disclosed to be cut the disclosed stream of cutting of the control of rheology longitudinal axial flow and combining device and Chinese patent ZL 00137715.9 and comprises with longitudinal axial flow Combined threshing separator and cut flow threshing device, the auxiliary feeding device that light cylinder and tooth plate cylinder form, longitudinal axial flow threshing device, complex structure, volume is larger, cost is higher, generally be configured in feed quantity 6-8kg/s, on the large-scale wheel joint grain header of swath more than 4 meters, operating efficiency be 15-20 mu/hour, this device is used for the results wheat, operation effectiveness is better during the Dry crops such as rape, the results difficulty is taken off, during the high paddy rice of moisture content, power consumption is larger, plugging fault easily appears.The disclosed longitudinal axial flow threshing device of Chinese patent CN200920118544.2, CN201110172174.2 and CN201120217361.3 is longitudinal axial flow list cylinder threshing separator, generally be configured on all feeding-in combine of feed quantity 2-3kg/s, operating efficiency be 6-10 mu/hour.During the high-yield rice of this device results per mu yield more than 750 kilograms, machine total loss rate and percentage of impurity significantly increase, power consumption becomes large, and operating efficiency obviously descends.
Summary of the invention
The objective of the invention is to overcome the technical disadvantages of above-mentioned threshing cleaning unit, providing a kind of can be configured on the track combine, satisfy the crop harvesting requirements such as feed quantity 3.5～7kg/s paddy rice, wheat, rape, barley and beans, operating efficiency 15-20 mu/hour, have the threshing separating power strong, the stream threshing separating cleaner is indulged in cutting that grain loss rate and percentage of impurity are low.
The technical solution used in the present invention is, cut vertical stream threshing separating cleaner and mainly comprise and cut vertical stream twin-roll installed threshing separator, emersion object conveying plant, two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve, the assorted remaining conveying plant of seed, transmission system and frame, wherein cut longitudinal axial flow twin-roll installed threshing separator and mainly form by cutting stream installed threshing separator and longitudinally axial flow threshing and separating installation.It is characterized in that, cut the stream installed threshing separator and mainly comprise flow-cut threshing cylinder, cut the stream notch board and cut the stream top cover; Longitudinally axial flow threshing and separating installation mainly comprises longitudinally axial flow threshing cylinder, conical flow guiding cover, longitudinal axial flow top cover and longitudinal axial flow notch board; The emersion object conveying plant is for cutting stream emersion object shuttle board and longitudinal axial flow emersion object shuttle board; Two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve comprises two air channel multiple-blade axial flow blowers and double-deck screen shale shaker; The assorted remaining conveying plant of seed comprises tailing auger, the assorted remaining outlet of secondary and seed screw feeder.
Cut the stream installed threshing separator between delivery chute and longitudinally axial flow threshing and separating installation, crawl is thrown to the longitudinally axial flow threshing and separating installation that is positioned at the rear with crop and is realized taking off again separation after carrying out preliminary threshing separation from crop in the delivery chute; Evenly be transported to the top sieve front end of two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve through cutting stream emersion object shuttle board from cutting the isolated emersion object of stream notch board, be delivered to the top sieve middle part of two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve from the isolated emersion object of longitudinal axial flow notch board by longitudinal axial flow emersion object shuttle board, cut stream and realize seed and assorted remaining separating with the longitudinal axial flow emersion object in the effect of air-flow, compass screen surface; Be positioned at the seed screw feeder of below and realized the conveying of clean seed, tailing auger will mix remaining carry and dish out longitudinal axial flow emersion object shuttle board from the assorted remaining outlet of secondary on, again clean.
Cut and flow the below that notch board is positioned at flow-cut threshing cylinder, comprise cut stream feeding dull and stereotyped, cut the stream grid concave plate and cut stream and throw flat board, wherein cut the stream grid concave plate to cut stream feeding dull and stereotyped and cut stream and throw between the flat board, cutting stream notch board and delivery chute joining place is the smooth stream feeding flat board of cutting, and the guiding crop enters and cuts the stream installed threshing separator; Cutting stream notch board and conical flow guiding cover joining place is that the smooth stream of cutting throws flat board, improves the ability that throws of crop.
Longitudinally axial flow threshing and separating installation is low early and high after and is in tilted layout, longitudinally axial flow threshing cylinder axis and the machine horizontal direction angle that advances is 0～15 °, longitudinally axial flow threshing drum front end feeding auger head comprises spiral feeding blade, anti-tangle plate and a spiral feeding inner core, wherein the outer end of spiral feeding blade is pre-large post-small inverted cone-shaped structure, and a spiral feeding inner core is pre-large post-small pyramidal structure; The conical flow guiding cover comprises conical flow guiding over body case and spiral stream guidance blade, and the conical flow guiding over body case that is positioned at the spiral feeding blade outside is pre-large post-small inverted cone-shaped structure, and front end is with to cut the stream notch board wide, and the rear end is concordant with the longitudinal axial flow top cover with the longitudinal axial flow notch board; Conical flow guiding over body case internal placement has a plurality of spiral stream guidance blades, and the longitudinal axial flow roller front end spiral feeding blade of High Rotation Speed cooperates the powerful pneumatic transportation effect of formation with the conical flow guiding cover, strengthen the smooth and easy conveying capacity of the not damaged of crop.
Double-deck screen shale shaker is comprised of top sieve, lower sieve, tail sheet, connection connecting lever and vibratory sieve driving mechanism; Cut and flow the top sieve front upper place that the emersion object shuttle board is positioned at double-deck screen shale shaker, joining place is interlaced; Tail sheet is positioned at the rear of top sieve, is used for discharging long stalk; Lower sieve is positioned at the below of top sieve, finishes the screening of clean seed; Longitudinal axial flow emersion object shuttle board (10) is realized the reciprocating motion of front and back to shaking by connecting connecting lever with cut stream emersion object shuttle board, top sieve, lower sieve and the tail sheet that are installed on the same screen box under the effect of vibratory sieve driving mechanism, reduced the vibration out-of-balance force.
Two air channels multiple-blade axial flow blower is by upper air outlet, volute of blower, fan blade, lower air outlet and split-wind plate, wherein volute of blower is positioned at the outside of fan blade, and the upper air outlet that the air-flow that the fan blade High Rotation Speed forms always is arranged in respectively air outlet under the blower fan rear and is positioned at the blower fan top blows out; Upper air outlet is being cut stream emersion object shuttle board and is being cleaned between the top sieve, realizes light assorted remaining selection by winnowing; The split-wind plate that is installed in the lower air outlet is divided into a plurality of zones with lower air outlet, has covered whole top sieve, lower sieve and tail sheet.
Described flow-cut threshing cylinder is spike-tooth or knife-edge dental roller, cuts stream notch board entrance gap 10～40mm adjustable, and outlet gap 10～40mm is adjustable, improves the adaptability to crop.
Described longitudinally axial flow threshing cylinder is spike-tooth or spike-tooth-tooth plate combination roll, and longitudinally axial flow threshing cylinder, longitudinal axial flow notch board and longitudinal axial flow top cover adopt eccentric configuration, and 10～40mm is adjustable for longitudinal axial flow notch board leading portion cylinder-concave clearance, improves the separating power to crop.
The invention has the beneficial effects as follows, configurable on feed quantity 3.5～7kg/s track combine, satisfy the high-performance mechanical results requirement of the crops such as paddy rice, wheat, rape, barley and beans, have that operating efficiency is high, the threshing separating power is strong, the advantage such as the threshing separation power is lower, grain loss rate and percentage of impurity are low.
Description of drawings
Fig. 1 cuts vertical stream threshing separating cleaner structural representation front view.
Fig. 2 cuts vertical stream threshing separating cleaner structural representation vertical view.
Fig. 3 cuts stream notch board structural representation front view.
Fig. 4 cuts stream notch board structural representation vertical view.
Fig. 5 is that the conical flow guiding cover cooperates schematic diagram with longitudinally axial flow threshing cylinder spiral feeding head.
Fig. 6 is that longitudinal axial flow emersion object shuttle board and double-deck screen shale shaker are arranged schematic diagram.
Fig. 7 is two air channels multiple-blade axial flow blower structural representations.
Among the figure, 1. cut the stream top cover, 2. flow-cut threshing cylinder, 3. cut the stream notch board, 301. it is dull and stereotyped to cut the stream feeding, 302. cut the stream grid concave plate, throw flat board 303. cut stream, 4. conical flow guiding cover, 1202. times sieves of 401. conical flow guiding over body cases, 402. spiral stream guidance blades 5. longitudinal axial flow notch boards, 6. longitudinally axial flow threshing cylinders 601. spiral feeding blades, 602. anti-tangle plate 603. a spirals feeding inner core 7. longitudinal axial flow top covers 8. transmission systems 9. frames 10. longitudinal axial flow emersion object shuttle boards, 11. tailing augers, 12. double-deck screen shale shakers, 1201. top sieves, 1203. tail sheets 1204. connect the assorted remaining outlet 14. seed screw feeders 15. of connecting levers 1205. vibratory sieve driving mechanisms 13. secondaries and cut 1604. times air outlet 1605. split-wind plates of air outlet 1602. volute of blower 1603. fan blades on the multiple-blade axial flow blower 1601. of 16. pairs of air channels of stream emersion object shuttle board.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
As depicted in figs. 1 and 2, cut vertical stream threshing separating cleaner and mainly comprise and cut vertical stream twin-roll installed threshing separator, emersion object conveying plant, two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve, the assorted remaining conveying plant of seed, transmission system 8 and frame 9, wherein cut longitudinal axial flow twin-roll installed threshing separator and mainly form by cutting stream installed threshing separator and longitudinally axial flow threshing and separating installation.Cutting the stream installed threshing separator mainly comprises flow-cut threshing cylinder 2, cuts stream notch board 3 and cuts stream top cover 1; Longitudinally axial flow threshing and separating installation mainly comprises longitudinally axial flow threshing cylinder 6, conical flow guiding cover 4, longitudinal axial flow top cover 7 and longitudinal axial flow notch board 5; The emersion object conveying plant is for cutting stream emersion object shuttle board 15 and longitudinal axial flow emersion object shuttle board 10; Two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve comprises two air channel multiple-blade axial flow blowers 16 and double-deck screen shale shaker 12; The assorted remaining conveying plant of seed comprises tailing auger 11, the assorted remaining outlet 13 of secondary and seed screw feeder 14.
As shown in Figure 3 and Figure 4, cut and flow the below that notch board 3 is positioned at spike-tooth or knife-edge dental roller flow-cut threshing cylinder 2, comprise cutting stream feeding flat board 301, cut stream grid concave plate 302 and cutting stream and throw dull and stereotyped 303, wherein cutting stream notch board 3 is the smooth stream feeding flat board 301 of cutting with the delivery chute joining place, and the guiding crop enters and cuts the stream installed threshing separator; Cutting stream notch board 3 is that the smooth stream of cutting throws flat board 303 with conical flow guiding cover 4 joining places, improves the ability that throws of crop.Cut stream notch board 3 entrance gaps, 10～40mm adjustable, outlet gap 10～40mm is adjustable.
Such as Fig. 1 and shown in Figure 5, longitudinally axial flow threshing and separating installation is low early and high after and is in tilted layout, longitudinally axial flow threshing cylinder 6 axis and the machine horizontal direction angle that advances is 0～15 °, longitudinally axial flow threshing cylinder 6 front end feeding auger heads comprise spiral feeding blade 601, anti-tangle plate 602 and a spiral feeding inner core 603, wherein the outer end of spiral feeding blade 601 is pre-large post-small inverted cone-shaped structure, and a spiral feeding inner core 603 is pre-large post-small pyramidal structure; Be positioned at spiral feeding blade 601) outside conical flow guiding over body case 401 be pre-large post-small inverted cone-shaped structure, front end with cut stream notch board 3 wide, rear end and longitudinal axial flow notch board 5 are wide; Conical flow guiding over body case 401 internal placement have a plurality of spiral stream guidance blades 402, the longitudinal axial flow roller front end spiral feeding blade 601 of High Rotation Speed cooperates with conical flow guiding cover 4 and forms like the class axial-flow pump airflow and inhale running usefulness, strengthens the smooth and easy conveying capacity of the not damaged of crop.Spike-tooth or spike-tooth-tooth plate combination roll longitudinally axial flow threshing cylinder 6, longitudinal axial flow notch board 5 and longitudinal axial flow top cover 7 adopt eccentric configuration, and 10～40mm is adjustable for longitudinal axial flow notch board leading portion cylinder-concave clearance, improves the separating power to crop.
As shown in Figure 6, double-deck screen shale shaker 12 is comprised of top sieve 1201, lower sieve 1202, tail sheet 1203, connection connecting lever and vibratory sieve driving mechanism 1205; Longitudinal axial flow emersion object shuttle board 10 is realized the reciprocating motion of front and back to shaking by connecting connecting lever with cut stream emersion object shuttle board 15, top sieve 1201, lower sieve 1202 and the tail sheet 1203 that are installed on the same screen box under the effect of vibratory sieve driving mechanism 1205, reduced the vibration out-of-balance force.
As shown in Figure 7, two air channels multiple-blade axial flow blower 16 is by upper air outlet 1601, volute of blower 1602, fan blade 1603, lower air outlet 1604 and split-wind plate 1605, wherein go up air outlet 1601 and cutting stream emersion object shuttle board 15 and cleaning between the top sieve 1201, realize light assorted remaining selection by winnowing; Split-wind plate 1605 is divided into a plurality of zones with lower air outlet 1604, has covered whole top sieve 1201, lower sieve 1202 and tail sheet 1203.
Cut the stream installed threshing separator between delivery chute and longitudinally axial flow threshing and separating installation, crawl is thrown to the longitudinally axial flow threshing and separating installation that is positioned at the rear with crop and is realized taking off again separation after carrying out preliminary threshing separation from crop in the delivery chute; Evenly be transported to top sieve 1201 front ends of two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve through cutting stream emersion object shuttle board 15 from cutting stream notch board 3 isolated emersion objects, be delivered to top sieve 1201 middle parts of two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve from longitudinal axial flow notch board 5 isolated emersion objects by longitudinal axial flow emersion object shuttle board 10, cut stream and realize seed and assorted remaining separating with the longitudinal axial flow emersion object in the effect of air-flow, compass screen surface; Be positioned at the seed screw feeder 14 of below and realized the conveying of clean seed, tailing auger 11 will mix remaining carry and dish out longitudinal axial flow emersion object shuttle board 10 from the assorted remaining outlet 13 of secondary on, again clean.
The feed quantity of cutting when indulging stream threshing separating cleaner results paddy rice of this model is 3.5～7kg/s, 10～20 mu/hour of operating efficiencies, and total power consumption is 20～40KW, threshing and cleaning total loss rate≤2.5%, seed percentage of impurity≤1.5%, seed damage rate≤1.5%.
Claims (3)
1. cut vertical stream threshing separating cleaner, it is characterized in that, comprise and cut vertical stream twin-roll installed threshing separator, emersion object conveying plant, two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve, the assorted remaining conveying plant of seed, transmission system (8) and frame (9), the described longitudinal axial flow twin-roll installed threshing separator of cutting comprises cutting and flows installed threshing separator and longitudinally axial flow threshing and separating installation; Cutting the stream installed threshing separator comprises flow-cut threshing cylinder (2), cuts stream notch board (3) and cuts stream top cover (1); Longitudinally axial flow threshing and separating installation comprises longitudinally axial flow threshing cylinder (6), conical flow guiding cover (4), longitudinal axial flow top cover (7) and longitudinal axial flow notch board (5); The emersion object conveying plant is for cutting stream emersion object shuttle board (15) and longitudinal axial flow emersion object shuttle board (10); Two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve comprises two air channel multiple-blade axial flow blowers (16) and double-deck screen shale shaker (12); The assorted remaining conveying plant of seed comprises tailing auger (11), secondary assorted remaining outlet (13) and seed screw feeder (14);
Cut the stream installed threshing separator between delivery chute and longitudinally axial flow threshing and separating installation, crawl is thrown to the longitudinally axial flow threshing and separating installation that is positioned at the rear with crop and is realized taking off again separation after carrying out preliminary threshing separation from crop in the delivery chute; Evenly be transported to top sieve (1201) front end of two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve through cutting stream emersion object shuttle board (15) from cutting the isolated emersion object of stream notch board (3), be delivered to top sieve (1201) middle part of two air channels Type Airflow Rice-Wheat Cleaning Apparatus with Centrifugal Fan-Oscillating Sieve from the isolated emersion object of longitudinal axial flow notch board (5) by longitudinal axial flow emersion object shuttle board (10), cut stream and realize seed and assorted remaining separating with the longitudinal axial flow emersion object in the effect of air-flow, compass screen surface; Be positioned at the seed screw feeder (14) of below and realized the conveying of clean seed, tailing auger (11) will mix remaining carry and dish out longitudinal axial flow emersion object shuttle board (10) from the assorted remaining outlet of secondary (13) on, again clean;
Cut and flow the below that notch board (3) is positioned at flow-cut threshing cylinder (2), comprise and cut stream feeding dull and stereotyped (301), cut stream grid concave plate (302) and cut stream and throw flat board (303), cut stream grid concave plate (302) and be positioned to cut stream feeding flat board (301) and cut stream and throw between the flat board (303); The described stream notch board (3) of cutting is the smooth stream feeding dull and stereotyped (301) of cutting with the delivery chute joining place, and the guiding crop enters and cuts the stream installed threshing separator; Cutting stream notch board (3) is that the smooth stream of cutting throws flat board (303) with conical flow guiding cover (4) joining place;
Longitudinally axial flow threshing and separating installation is low early and high after and is in tilted layout, longitudinally axial flow threshing cylinder (6) axis and the machine horizontal direction angle that advances is 0～15 °, longitudinally axial flow threshing cylinder (6) front end feeding auger head comprises spiral feeding blade (601), anti-tangle plate (602) and a spiral feeding inner core (603), the outer end of described spiral feeding blade (601) is pre-large post-small inverted cone-shaped structure, and a spiral feeding inner core (603) is pre-large post-small pyramidal structure; Conical flow guiding cover (4) comprises conical flow guiding over body case (401) and spiral stream guidance blade (402), the conical flow guiding over body case (401) that is positioned at spiral feeding blade (601) outside is pre-large post-small inverted cone-shaped structure, front end with cut stream notch board (3) wide, the rear end is concordant with longitudinal axial flow top cover (7) with longitudinal axial flow notch board (5); Conical flow guiding over body case (401) internal placement has spiral stream guidance blade (402), the longitudinal axial flow roller front end spiral feeding blade (601) of High Rotation Speed cooperates the powerful pneumatic transportation effect of formation with conical flow guiding cover (4), strengthen the smooth and easy conveying capacity of the not damaged of crop;
Double-deck screen shale shaker (12) comprises top sieve (1201), lower sieve (1202), tail sheet (1203), connects connecting lever and vibratory sieve driving mechanism (1205); Cut and flow top sieve (1201) front upper place that emersion object shuttle board (15) is positioned at double-deck screen shale shaker (12), joining place is interlaced; Tail sheet (1203) is positioned at the rear of top sieve (1201), discharges long stalk; Lower sieve (1202) is positioned at the below of top sieve (1201), finishes the screening of clean seed; Longitudinal axial flow emersion object shuttle board (10) flows the reciprocating motion of front and back to shaking under the effect of vibratory sieve driving mechanism (1205) of emersion object shuttle board (15), top sieve (1201), lower sieve (1202) and tail sheet (1203) by connecting connecting lever and being installed in cutting on the same screen box, has reduced the vibration out-of-balance force;
Two air channel multiple-blade axial flow blowers (16) comprise air outlet (1601), volute of blower (1602), fan blade (1603), lower air outlet (1604) and split-wind plate (1605), described volute of blower (1602) is positioned at the outside of fan blade (1603), and the air-flow that fan blade (1603) High Rotation Speed forms always is arranged in respectively air outlet under the blower fan rear (1604) and the upper air outlet (1601) that is positioned at above the blower fan blows out; Upper air outlet (1601) is positioned at cuts stream emersion object shuttle board (15) and cleaning between the top sieve (1201), carries out selection by winnowing more than gently mixing; Split-wind plate (1605) is installed in the lower air outlet (1604), has covered whole top sieve (1201), lower sieve (1202) and tail sheet (1203).
2. according to claim 1 cutting indulged the stream threshing separating cleaner, it is characterized in that, described flow-cut threshing cylinder (2) is spike-tooth or knife-edge dental roller, cuts between stream notch board (3) entrance gap 10～40mm adjustable, adjustable between outlet gap 10～40mm, improve the adaptability to crop.
3. according to claim 1 cutting indulged the stream threshing separating cleaner, it is characterized in that, described longitudinally axial flow threshing cylinder (6) is spike-tooth or spike-tooth-tooth plate combination roll, longitudinally axial flow threshing cylinder (6), longitudinal axial flow notch board (5) and longitudinal axial flow top cover (7) adopt eccentric configuration, 10～40mm is adjustable for longitudinal axial flow notch board (5) leading portion cylinder-concave clearance, improves the separating power to crop.
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