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NL2032953A - Giant centrifugal cleaning and screening device for combine harvester - Google Patents

Giant centrifugal cleaning and screening device for combine harvester Download PDF

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Publication number
NL2032953A
NL2032953A NL2032953A NL2032953A NL2032953A NL 2032953 A NL2032953 A NL 2032953A NL 2032953 A NL2032953 A NL 2032953A NL 2032953 A NL2032953 A NL 2032953A NL 2032953 A NL2032953 A NL 2032953A
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NL
Netherlands
Prior art keywords
centrifugal cylinder
centrifugal
baffle
housing
reinforcing ribs
Prior art date
Application number
NL2032953A
Other languages
Dutch (nl)
Other versions
NL2032953B1 (en
Inventor
Su Zhan
Ding Zhao
Wang Zhiming
Fu Yunfeng
Zhou Xuan
Original Assignee
Jinhua Polytechnic
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Publication of NL2032953A publication Critical patent/NL2032953A/en
Application granted granted Critical
Publication of NL2032953B1 publication Critical patent/NL2032953B1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00—Parts or details of threshing apparatus
    • A01F12/44—Grain cleaners; Grain separators
    • A01F12/442—Rotary cleaners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/50—Cleaning
    • B07B1/55—Cleaning with fluid jets

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Centrifugal Separators (AREA)

Abstract

Disclosed is a giant centrifugal cleaning and screening device for a combine harvester. The device includes a centrifugal cylinder, a main shaft, a guide blade and a driving system, where a secondary screening device is further arranged and includes a housing and blowing blades. the driving system drives the centrifugal cylinder to rotate, the centrifugal cylinder and the guide blade rotate relative to each other, rice is transported along the guide blade and further primarily screened due to a centrifugal force, so as to separate large impurities from the rice, the rice and small impurities are transported into the housing, and the blowing blades can separate the rice from the small impurities, and the large impurities can be transported down the guide blade and finally discharged via a first transportation channel, so as to reduce rice loss in a secondary screening process.

Description

GIANT CENTRIFUGAL CLEANING AND SCREENING DEVICE FOR
COMBINE HARVESTER
TECHNICAL FIELD
[DI] The present invention relates to the technical field of agricultural machinery, and particularly relates to a giant centrifugal cleaning and screening device for a combine harvester.
BACKGROUND ART
[02] A combine harvester, a combination machine for harvesting crops, was called a combine in the early 1950s. It is a harvesting machine capable of harvesting, threshing, separating stems and stalks, removing impurities, etc. of cereal crops once and directly obtaining grains from the field. However, an existing combine harvester cannot effectively separate stems and stalks and remove impurities from giant rice, so its screening device needs to be improved.
[03] In existing screening devices such as a centrifugal cleaning and sorting funnel screen device for giant rice and a harvester disclosed in CN201910941990.1, some large stems, stalks or leaves are screened by a centrifugal cylinder, and then screened secondarily by an outer funnel screen. Nonetheless, too idealistic secondary screening may cause a lot of rice loss, and it is impossible to guarantee whether many impurities such as dust and soil are mixed in rice during the secondary screening.
[04] Therefore, a giant centrifugal cleaning and screening device for a combine harvester is needed.
SUMMARY
[05] To solve the technical problem, there is provided a giant centrifugal cleaning and screening device for a combine harvester.
[06] In order to achieve the objective, the present invention uses the technical solutions:
[07] The giant centrifugal cleaning and screening device for a combine harvester includes a centrifugal cylinder, a main shaft, a guide blade and a driving system. The centrifugal cylinder 1s provided with a feed hole, a transportation channel and a first discharge hole. The main shaft is arranged at an axis of the centrifugal cylinder in a penetrating manner. The guide blade is arranged on the main shaft and abuts against an inner wall of the centrifugal cylinder. The driving system is connected to one end of the feed hole of the centrifugal cylinder. A secondary screening device is further arranged on an outer side of the centrifugal cylinder. The secondary screening device includes a housing and blowing blades. The housing is arranged on an outer side of the centrifugal cylinder in a wrapping manner. The housing is internally provided with adjacent second discharge holes and third discharge holes. The blowing blades are arranged on an outer side of the first discharge hole.
[08] Preferably, the centrifugal cylinder is in a shape of an inverted circular truncated cone, the transportation channel includes a plurality of first through holes evenly distributed on the centrifugal cylinder, and the centrifugal cylinder is further provided with a plurality of first reinforcing ribs.
[09] Preferably, the driving system consists of a first gear, a second gear, a decelerator and a first motor, the first gear is arranged on an outer side of a discharge hole of the centrifugal cylinder in a sleeving manner, and the second gear is arranged at one side of the first gear and meshes with the first gear. The decelerator is located below the second gear and connected to the second gear. The first motor is arranged on the housing, and an output end of the first motor points upward and is connected to the decelerator.
[10] Preferably, the first gear is provided with a plurality of evenly distributed first slots, and a top end of the feed hole is further provided with first pins that are consistent with the first slots in amount and correspond one-to-one to the first slots.
[11] Preferably, a first groove and a second groove are provided at junctions of upper and lower ends of the housing and the centrifugal cylinder respectively, a first bearing and a second bearing are arranged in the first groove and the second groove respectively, and two ends of the first bearing and two ends of the second bearing are fixedly connected to an inner wall of the housing and an outer surface of the centrifugal cylinder respectively.
[12] Preferably, the housing consists of a first baftle, a second baffle and a third baffle,
[13] the first baffle is coaxial with the centrifugal cylinder and is arranged on an outer side of the centrifugal cylinder, one end of the first baffle is tightly attached to an outer side of the first discharge hole, the first baffle surrounds the outer side of the first discharge hole in an obliquely downward manner, and one end of the first baffle is tightly attached to the outer side of the first discharge hole.
[14] The second baftle consists of a first oblique plate and a first separation plate, the first oblique plate and the first separation plate are coaxial with the centrifugal cylinder and are arranged on an outer side of the centrifugal cylinder, one end of the first oblique plate is tightly attached to an outer side of the feed hole, the first oblique plate surrounds an outer side of the centrifugal cylinder in an obliquely downward manner, and the first separation plate is arranged at the other end of the first oblique plate in a downward manner.
[15] The third baffle consists of a second oblique plate and a second separation plate, the second oblique plate and the second separation plate are coaxial with the centrifugal cylinder and are arranged on an outer side of the centrifugal cylinder, the second oblique plate is arranged in the middle of the centrifugal cylinder and at one side away from the centrifugal cylinder, the second oblique plate surrounds the outer side of the centrifugal cylinder in an obliquely downward manner and is not intersected with a second vertical plate, and the second separation plate is arranged at the other end of the second oblique plate in a downward manner.
[16] Preferably, the housing is further provided with second reinforcing ribs, third reinforcing ribs and fourth reinforcing ribs. There are a plurality of second reinforcing ribs, the plurality of second reinforcing ribs are arranged evenly around a top end of the second oblique plate, and two ends of the second reinforcing ribs are fixedly connected to an inner wall of the first oblique plate and an outer surface of the first baffle respectively. There are a plurality of third reinforcing ribs, the plurality of third reinforcing ribs are arranged evenly around the outer surface of the centrifugal cylinder, and two ends of the third reinforcing ribs are fixedly connected to a top end of the first oblique plate and a top end of the first baffle respectively. There are a plurality of fourth reinforcing ribs, the plurality of fourth reinforcing ribs are arranged evenly around the second discharge holes and the third discharge holes, and upper surfaces of the fourth reinforcing ribs are arc-shaped.
[17] Preferably, the first baffle is provided with a plurality of second through holes, the plurality of second through holes are evenly provided on the first baffle, and the plurality of second through holes are concentrated at a position between the top end of the second oblique plate and the centrifugal cylinder.
[18] Preferably, a bottom end of the centrifugal cylinder is provided with a vertically downward first convex part, an outer surface of the first convex part is provided with a plurality of evenly distributed second slots, the blowing blades are provided with second pins corresponding to the second slots, two ends of each of the second slots are provided with second convex parts, the second convex parts are provided with a plurality of evenly distributed first threaded holes, and the blowing blades are provided with corresponding second threaded holes that are consistent with the first threaded holes in amount.
[19] Preferably, the housing is further provided with two third pins, the third pins are provided with a plurality of third threaded holes, and the two third pins are symmetrically arranged with respect to the housing.
[20] Compared with the prior art, the present application has the beneficial effects:
[21] 1. According to the present application, the driving system may drive the centrifugal cylinder to rotate, the centrifugal cylinder and the guide blade rotate relative to each other, rice is transported down along the guide blade, and the rice may be further primarily screened in a transportation channel due to a centrifugal force in addition to downward transportation, so as to separate large impurities such as leaves, stems and stalks from the rice. The rice and small impurities are transported into the housing, and the blowing blades separate the rice from the small impurities because a weight of the rice is greater than that of the small impurities, so as to discharge the rice 5 and the small impurities via a second transportation channel and a third transportation channel. Meanwhile, the blowing blades may further blow up dust on the rice for primary cleaning, the large impurities cannot pass through the transportation channel, and then are transported down the guide blade and finally discharged via a first transportation channel, so as to reduce rice loss in a secondary screening process.
[22] 2. According to the present application, the driving system drives the centrifugal cylinder to rotate, such that the rice abuts against the inner wall of the centrifugal cylinder under the action of the centrifugal force. Furthermore, because the centrifugal cylinder is in a shape of a circular truncated cone, the rice may rotate obliquely, so as to obviously enhance primary screening of the rice by means of the first through holes. However, the large impurities cannot pass through the first through holes and may be discharged via the first discharge hole along the guide blade. The first reinforcing ribs make the centrifugal cylinder more stable during rotation.
Therefore, the technical problem of how to primarily screen the rice is solved.
[23] 3. According to the present application, the first motor starts to work so as to make the decelerator control a rotation speed, and the decelerator may control to have a certain rotation speed and drive the second gear to rotate, such that the first gear meshing with the second gear rotates. In this way, the first gear drives the centrifugal cylinder to rotate at a certain speed, so as to solve the technical problem of how to drive the centrifugal cylinder to rotate.
[24] 4. According to the present application, the first gear is arranged on an outer side of the discharge hole, the first pins and the first pins correspond to each other and are fixed by means of screws, the first gear may be replaced through quick disassembly when being damaged, and connection between the first gear and the centrifugal cylinder is strengthened, thus solving the technical problem of how to facilitate gear replacement.
[25] 5. According to the present application, the two ends of the first bearing and the two ends of the second bearing are connected to the housing and the centrifugal cylinder respectively, friction between the centrifugal cylinder and the housing is reduced during rotation of the centrifugal cylinder, and then the housing does not move together with the centrifugal cylinder, thereby reducing failures of the driving system caused by the fact that the housing and the centrifugal cylinder move together. The first groove and the second groove may be used to strengthen a fixing effect of the first bearing and the second bearing, so as to solve the technical problem of how to prevent the housing from rotating with the centrifugal cylinder due to the friction.
[26] 6. According to the present application, the inside of the housing is separated by the third baffle, and the housing is internally provided with channels that are in communication with the second discharge holes and the second discharge holes respectively. Because the second oblique plate is not tightly attached to the centrifugal cylinder, there is a space for the blowing blades to blow and separate the rice having the small impurities. When the rice having the small impurities is transported into the housing, the blowing blades may blow up the impurities, such that the small impurities may be transported to a space above the third baffle, slide down along the second oblique plate and finally be discharged via the second discharge holes. However, the rice may fall onto the first baffle due to large gravity and be discharged from the third discharge holes made by the second separation plate along the first baffle. The first baffle and the second oblique plate are arranged in an obliquely downward manner, so as to make the rice and the small impurities slide downwards and discharge out under the influence of gravity. The first oblique plate is oblique so as to make some impurities blown to the inner wall of the first oblique plate slide down along the inner wall, thus solving the technical problem of how to conduct secondary separation by means of the housing.
[27] 7. According to the present application, the first baffle, the second baffle and the third baffle are fixed by the plurality of second reinforcing ribs, so as to prevent openings at two ends from inclining after fixation. The first baffle and the second baffle close to the centrifugal cylinder are connected by the second baffle, so as to prevent the first baffle or the second baffle from inclining. The third discharge holes are provided by means of the fourth reinforcing ribs, so as to prevent deviation between the first separation plate and the second separation plate or the first baffle, and reduce a discharge amount of the rice. The upper surfaces of the fourth reinforcing ribs are arc-shaped, so as to further prevent some rice from staying on the fourth reinforcing ribs and solve the technical problem of how to fix the housing.
[28] 8. According to the present application, when the blowing blades rotate along with the centrifugal cylinder, the first baffle has a downward oblique structure, such that wind generated by the blowing blades may be effectively transported into the housing via the plurality of second through holes. Because a diameter of the second through holes is small, the rice cannot be stuck in the second through holes, or may be blown up by the wind at a lower end at the moment of sticking, thus solving the technical problem of how to make the wind generated by the blowing blades be transported to the inside.
[29] 9. According to the present application, each of the second pins on the blowing blades is aligned with a certain second slot on the first convex part, and is pressed onto the second slot by external force, such that the first threaded hole is aligned with the second threaded hole. Then, an external screw is inserted into the first threaded hole and the second threaded hole, such that the blowing blades are fixedly connected to the second convex parts on the centrifugal cylinder. When repair or disassembly is required, disassembly may be conducted rapidly only by removing the screw, so as to facilitate maintenance, and solve the technical problem of how to make the blowing blades move together with the centrifugal cylinder.
[30] 10. According to the present application, two symmetrical third pins are arranged at designated positions on the combine harvester, and screws are inserted into the third threaded holes for fixing. A plurality of third threaded holes are used to prevent inclination of a cleaning and screening device from influencing cleaning and screening works, so as to solve the technical problem of how to stably fix the cleaning and screening device.
BRIEF DESCRIPTION OF THE DRAWINGS
BIJ] FIG. 1 is a first solid diagram of a cleaning and screening device for implementing the present invention;
[32] FIG. 2 is a partially enlarged view of A in FIG. 1;
[33] FIG. 3 is a second solid diagram of a cleaning and screening device for implementing the present invention;
[34] FIG. 4 1s a partially enlarged view of B in FIG. 3;
[35] FIG. 5 is a top view of a cleaning and screening device for implementing the present invention;
[36] FIG. 6 is a vertical view of a cleaning and screening device for implementing the present invention;
[37] FIG. 7 is a solid diagram of a centrifugal cylinder and blowing blades for implementing the present invention;
[38] FIG. 8 is a partially enlarged view of C in FIG. 7;
[39] FIG. 9 is a solid diagram of a centrifugal cylinder for implementing the present invention;
[40] FIG. 10 1s a partially enlarged view of D in FIG. 9;
[41] FIG. 11 1s a solid diagram of blowing blades for implementing the present invention;
[42] FIG. 12 is a front view of a cleaning and screening device for implementing the present invention;
[43] FIG. 13 is a cutaway view of a E-E section in FIG. 12;
[44] FIG. 14 is a partially enlarged view of F in FIG. 13; and
[45] FIG. 15 is a partially enlarged view of D in FIG. 13.
[46] Reference numerals in the drawings:
[47] l-centrifugal cylinder; la-feed hole; 1al-first pin; 1b-transportation channel;
1b1-first through hole; lc-first discharge hole; 1d-first reinforcing rib; le-first groove; lel-first bearing; 1f-second groove; 1fl-second bearing; lg-first convex part; lgl-second slot; 1g2-second convex part, 1g3-first threaded hole; 2-main shaft; 3-guide blade; 4-driving system; 4a-first gear; 4al-first slot; 4b-second gear; 4c-decelerator; 4d-first motor; 5-housing; Sa-second discharge hole; 5b-third discharge hole; Sc-first baffle, 5c1-second through hole; Sd-second baffle; 5d1-first oblique plate; 5d2-first separation plate, Se-third baffle; 5el-second oblique plate; 5e2-second separation plate, Sf-second reinforcing rib; Sg-third reinforcing rib; Sh-fourth reinforcing rb; Shl-first curved surface; Si-third pin, Sil-third threaded hole; 6-blowing blade; 6a-second pin; and 6b-second threaded hole.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[48] The following description is used to disclose the present invention such that those skilled in the art may realize the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art may conceive of other obvious modifications.
[49] To solve the technical problem of how to improve rice loss in a secondary screening process, as shown in FIGs. 1-15, there is provided the preferred technical solution as follows:
[50] A giant centrifugal cleaning and screening device for a combine harvester includes a centrifugal cylinder 1, a main shaft 2, a guide blade 3 and a driving system 4.
The centrifugal cylinder 1 is provided with a feed hole 1a, a transportation channel 1b and a first discharge hole Ic. The main shaft 2 is arranged at an axis of the centrifugal cylinder 1 in a penetrating manner. The guide blade 3 is arranged on the main shaft 2 and abuts against an inner wall of the centrifugal cylinder 1. The driving system 4 is connected to one end of the feed hole 1a of the centrifugal cylinder 1.
[51] A secondary screening device is further arranged on an outer side of the centrifugal cylinder 1. The secondary screening device includes a housing 5 and blowing blades 6. The housing 5 is arranged on an outer side of the centrifugal cylinder 1 in a wrapping manner. The housing 5 is internally provided with adjacent second discharge holes 5a and third discharge holes 5b. The blowing blades 6 are arranged on an outer side of the first discharge hole Ic.
[52] Specifically, it should be noted that in a process of harvesting, transporting, threshing and separating stems and stalks of giant rice by the combine harvester. When the rice is transported to the cleaning and screening device, only the cut rice mixed with impurities such as stems, stalks and leaves may appear. When the rice is transported to the cleaning and screening device, the driving system 4 may drive the centrifugal cylinder 1 to rotate, the centrifugal cylinder 1 and the guide blade 3 rotate relative to each other, the rice is transported down along the guide blade 3, and the rice may be further primarily screened in a transportation channel 1b due to a centrifugal force in addition to downward transportation, so as to separate large impurities such as leaves, stems and stalks from the rice. The rice and small impurities are transported into the housing 5, and the blowing blades 6 separate the rice from the small impurities because a weight of the rice is greater than that of the small impurities, so as to discharge the rice and the small impurities via a second transportation channel and a third transportation channel 1b. Meanwhile, the blowing blades 6 may further blow up dust on the rice for primary cleaning, the large impurities cannot pass through the transportation channel 1b, and then are transported down the guide blade 3 and finally discharged via a first transportation channel 1b.
[53] To solve the technical problem of how to primarily screen the rice, as shown in FIGs. 5 and 7, there is provided the preferred technical solution as follows:
[54] The centrifugal cylinder 1 is in a shape of an inverted circular truncated cone, the transportation channel 1b includes a plurality of first through holes 1b1 evenly distributed on the centrifugal cylinder 1, and the centrifugal cylinder 1 is further provided with a plurality of first reinforcing ribs 1d.
[55] Specifically, the driving system 4 drives the centrifugal cylinder 1 to rotate, such that the rice abuts against the inner wall of the centrifugal cylinder 1 under the action of the centrifugal force. Furthermore, because the centrifugal cylinder 1 isin a shape of a circular truncated cone, the rice may rotate obliquely, so as to obviously enhance primary screening of the rice by means of the first through holes 1bl.
However, the large impurities cannot pass through the first through holes 1b1 and may be discharged via the first discharge hole lc along the guide blade 3. The first reinforcing ribs 1d make the centrifugal cylinder 1 more stable during rotation.
[56] To solve the technical problem of how to drive the centrifugal cylinder to rotate, as shown in FIGs. 1, 2, 5 and 13, there is provided the preferred technical solution as follows:
[57] The driving system 4 consists of a first gear 4a, a second gear 4b, a decelerator 4c and a first motor 4d, the first gear 4a is arranged on an outer side of a discharge hole of the centrifugal cylinder 1 in a sleeving manner, and the second gear
Ab is arranged at one side of the first gear 4a and meshes with the first gear 4a. The decelerator 4c is located below the second gear 4b and connected to the second gear 4b.
The first motor 4d is arranged on the housing 5, and an output end of the first motor 4d points upward and is connected to the decelerator 4c.
[58] Specifically, when it is necessary to rotate the centrifugal cylinder 1, the first motor 4d may start to work so as to make the decelerator 4c control a rotation speed, and the decelerator 4c may control to have a certain rotation speed and drive the second gear 4b to rotate, such that the first gear 4a meshing with the second gear 4b rotates. In this way, the first gear 4a drives the centrifugal cylinder 1 to rotate at a certain speed.
[59] To solve the technical problem of how to facilitate gear replacement, as shown in FIGs. 2 and 8, there is provided the preferred technical solution as follows:
[60] The first gear 4a is provided with a plurality of evenly distributed first slots 4al, and a top end of the feed hole la is further provided with first pins lal that are consistent with the first slots in amount and correspond one-to-one to the first slots.
[61] Specifically, the first gear 4a is arranged on an outer side of the discharge hole, the first pins lal and the first pins lal correspond to each other and are fixed by means of screws, the first gear 4a may be replaced through quick disassembly when being damaged, and connection between the first gear 4a and the centrifugal cylinder 1 is strengthened.
[62] To solve the technical problem of how to prevent the housing from rotating with the centrifugal cylinder due to friction, as shown in FIGs. 14 and 15, there is provided the preferred technical solution as follows:
[63] A first groove le and a second groove 1f are provided at junctions of upper and lower ends of the housing 5 and the centrifugal cylinder 1 respectively, a first bearing lel and a first bearing lel are arranged in the first groove le and the second groove If respectively, and two ends of the first bearing lel and two ends of the second bearing 1f1 are fixedly connected to an inner wall of the housing 5 and an outer surface of the centrifugal cylinder 1 respectively.
[64] Specifically, the two ends of the first bearing lel and the two ends of the second bearing 1fl are connected to the housing 5 and the centrifugal cylinder 1 respectively, friction between the centrifugal cylinder 1 and the housing 5 is reduced during rotation of the centrifugal cylinder, and then the housing 5 does not move together with the centrifugal cylinder 1, thereby reducing failures of the driving system 4 caused by the fact that the housing 5 and the centrifugal cylinder 1 move together.
The first groove le and the second groove If may be used to strengthen a fixing effect of the first bearing lel and the second bearing 1f1.
[65] To solve the technical problem of how to conduct secondary separation by means of the housing, as shown in FIG. 13, there is provided the preferred technical solution as follows:
[66] The housing 5 consists of a first baffle 5c, a second baffle 5d and a third baffle Se,
[67] the first baffle 5c is coaxial with the centrifugal cylinder 1 and is arranged on an outer side of the centrifugal cylinder 1, one end of the first baffle 5c is tightly attached to an outer side of the first discharge hole lc, the first baffle 5c surrounds the outer side of the first discharge hole 1c in an obliquely downward manner, and one end of the first baffle Sc is tightly attached to the outer side of the first discharge hole lc.
[68] The second baffle 5d consists of a first oblique plate 5d1 and a first separation plate 5d2, the first oblique plate 5d1 and the first separation plate 5d2 are coaxial with the centrifugal cylinder 1 and are arranged on an outer side of the centrifugal cylinder 1, one end of the first oblique plate 5d1 is tightly attached to an outer side of the feed hole la, the first oblique plate 5d1 surrounds an outer side of the centrifugal cylinder 1 in an obliquely downward manner, and the first separation plate 5d2 is arranged at the other end of the first oblique plate 5d1 in a downward manner.
[69] The third baffle Se consists of a second oblique plate Sel and a second separation plate 5e2, the second oblique plate Sel and the second separation plate 5e2 are coaxial with the centrifugal cylinder 1 and are arranged on an outer side of the centrifugal cylinder 1, the second oblique plate Sel is arranged in the middle of the centrifugal cylinder 1 and at one side away from the centrifugal cylinder 1, the second oblique plate Sel surrounds the outer side of the centrifugal cylinder 1 in an obliquely downward manner and is not intersected with a second vertical plate, and the second separation plate Se2 is arranged at the other end of the second oblique plate Sel in a downward manner.
[70] Specifically, it should be noted that a distance between a bottom end of the first oblique plate 5d1 and the centrifugal cylinder 1 is greater than that between the first baffle Sc as well as the second oblique plate 5el and the centrifugal cylinder 1, such that a first separation baffle may wrap the first baffle 5c and the third baffle 5e; and a distance between a bottom end of the second oblique plate 5el and the centrifugal cylinder 1 is greater than that between the first baffle Sc and the centrifugal cylinder 1, such that a second separation baffle may wrap the first baffle Sc and separate a space in the housing. Firstly, the inside of the housing 5 is separated by the third baffle Se, and the housing 5 is internally provided with channels that are in communication with the second discharge holes 5a and the second discharge holes 5a respectively. Because the second oblique plate 5el is not tightly attached to the centrifugal cylinder 1, there is a space for the blowing blades 6 to blow and separate the rice having the small impurities. When the rice having the small impurities is transported into the housing 5, the blowing blades 6 may blow up the impurities, such that the small impurities may be transported to a space above the third baffle 5e, slide down along the second oblique plate 5el and finally be discharged via the second discharge holes Sa. However, the rice may fall onto the first baffle 5c due to large gravity and be discharged from the third discharge holes Sb made by the second separation plate 5e2 along the first baffle Sc. The first baffle 5c and the second oblique plate Sel are arranged in an obliquely downward manner, so as to make the rice and the small impurities slide downwards and discharge out under the influence of gravity.
The first oblique plate 5d1 is oblique so as to make some impurities blown to the inner wall of the first oblique plate 5d1 slide down along the inner wall.
[71] To solve the technical problem of how to fix the housing, as shown in FIGs. 4 and 13, there is provided the preferred technical solution as follows:
[72] The housing 5 is further provided with second reinforcing ribs Sf, third reinforcing ribs Sg and fourth reinforcing ribs Sh. There are a plurality of second reinforcing ribs 5f, the plurality of second reinforcing ribs 5f are arranged evenly around a top end of the second oblique plate Sel, and two ends of the second reinforcing ribs 5f are fixedly connected to an inner wall of the first oblique plate 5d1 and an outer surface of the first baffle Sc respectively. There are a plurality of third reinforcing ribs 5g, the plurality of third reinforcing ribs 5g are arranged evenly around the outer surface of the centrifugal cylinder 1, and two ends of the third reinforcing ribs 5g are fixedly connected to a top end of the first oblique plate and a top end of the first baffle Sc respectively. There are a plurality of fourth reinforcing ribs Sh, the plurality of fourth reinforcing ribs Sh are arranged evenly around the second discharge holes 5a and the third discharge holes 5b, and upper surfaces of the fourth reinforcing ribs Sh are arc-shaped.
[73] Specifically, because the housing 5 consists of three baffles, the three baffles may inevitably collapse without any mechanism for connection and fixation, firstly, the first baffle Sc, the second baffle 5d and the third baffle Se are fixed by the plurality of second reinforcing ribs Sf, so as to prevent openings at two ends from inclining after fixation. The first baffle Sc and the second baffle 5d close to the centrifugal cylinder 1 are connected by the second baffle 5d, so as to prevent the first baffle 5c or the second baffle 5d from inclining. The third discharge holes 5b are provided by means of the fourth reinforcing ribs Sh, so as to prevent deviation between the first separation plate 5d2 and the second separation plate 5e2 or the first baffle Sc, and reduce a discharge amount of the rice. The upper surfaces of the fourth reinforcing ribs Sh are arc-shaped, so as to further prevent some rice from staying on the fourth reinforcing ribs 5h.
[74] To solve the technical problem of how to make wind generated by the blowing blades be transported to the inside, as shown in FIGs. 13 and 14, there is provided the preferred technical solution as follows:
[75] The first baffle 5c is provided with a plurality of second through holes 5cl, the plurality of second through holes Scl are evenly provided on the first baffle 5c, and the plurality of second through holes 5cl are concentrated at a position between the top end of the second oblique plate and the centrifugal cylinder 1.
[76] Specifically, it should be noted that a diameter of the second through holes 5cl is much smaller than a size of the giant rice, when the blowing blades 6 rotate along with the centrifugal cylinder 1, the first baffle 5c has a downward oblique structure, such that the wind generated by the blowing blades 6 may be effectively transported into the housing via the plurality of second through holes 5c1. Because a diameter of the second through holes 5cl is small, the rice cannot be stuck in the second through holes 5cl, or may be blown up by the wind at a lower end at the moment of sticking.
[77] To solve the technical problem of how to make the blowing blades move together with the centrifugal cylinder, as shown in FIGs. 8-11, there is provided the preferred technical solution as follows:
[78] A bottom end of the centrifugal cylinder 1 is provided with a vertically downward first convex part 1g, an outer surface of the first convex part 1g is provided with a plurality of evenly distributed second slots lgl, the blowing blades 6 are provided with second pins 6a corresponding to the second slots, two ends of each of the second slots 1gl are provided with second convex parts 1g2, the second convex parts 1g2 are provided with a plurality of evenly distributed first threaded holes 193, and the blowing blades 6 are provided with corresponding second threaded holes 6b that are consistent with the first threaded holes in amount.
[79] Specifically, it should be noted that the blowing blades 6 are detachably mounted on the first convex part 1g at the bottom end of the centrifugal cylinder 1, firstly, each of the second pins 6a on the blowing blades 6 is aligned with a certain second slot 1gl on the first convex part, and is pressed onto the second slot 1gl by external force, such that the first threaded hole is aligned with the second threaded hole 6b. Then, an external screw is inserted into the first threaded hole and the second threaded hole 6b, such that the blowing blades 6 are fixedly connected to the second convex parts 1g2 on the centrifugal cylinder 1. When repair or disassembly is required, disassembly may be conducted rapidly only by removing the screw, so as to facilitate maintenance.
[80] To solve the technical problem of how to stably fix the cleaning and screening device, as shown in FIG. 13, there is provided the preferred technical solution as follows:
[81] The housing 5 is further provided with two third pins 5i, the third pins 51 are provided with a plurality of third threaded holes Sil, and the two third pins 5i are symmetrically arranged with respect to the housing 5.
[82] Specifically, it should be noted that there are a plurality of screening and cleaning devices, and the plurality of screening and cleaning devices may finally be evenly arranged on the combine harvester. Two harvesters may be provided with third slots (not shown in the figure) and fourth threaded holes (not shown in the figure) corresponding to the third pins Si and the third threaded holes 5il. A plurality of cleaning and screening devices are arranged at designated positions of the combine harvester by means of two symmetrical third pins 51, and are fixed by inserting screws into the third threaded holes 511, and a plurality of third threaded holes 511 are used to prevent the cleaning and screening devices from inclining to influence cleaning and screening works.
[83] The above shows and describes the basic principles, essential features and advantages of the present invention. It should be understood by those skilled in the art that, the present invention is not limited by the above embodiments, the above embodiments and the description only illustrate the principle of the present invention, various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements all fall within the claimed scope of the present invention. The claimed protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

ConclusiesConclusions 1. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine, die een centrifugale cilinder (1), een hoofdschacht (2), een geleidingsblad (3) en een aandrijfsysteem (4) omvat, waarbij de centrifugale cilinder (1) voorzien is van een toevoergat (la), een transportkanaal (1b) en een eerste afvoergat (1c); waarbij de hoofdschacht (2) gerangschikt is op een as van de centrifugale cilinder (1) op een doordringende wijze; waarbij het geleidingsblad (3) gerangschikt is op de hoofdschacht (2) en tegen een binnenwand van de centrifugale cilinder (1) duwt; waarbij het aandrijfsysteem (4) verbonden is met één eind van het toevoergat (la) van de centrifugale cilinder (1); waarbij een secundaire zeefinrichting verder gerangschikt is op een buitenzijde van de centrifugale cilinder (1), waarbij de secundaire zeefinrichting een behuizing (5) en blaasbladen (6) omvat, waarbij de behuizing (5) gerangschikt is op een buitenzijde van de centrifugale cilinder (1) op een omwikkelende wijze en waarbij de behuizing (5) intern voorzien is van aangrenzende tweede afvoergaten (5a) en derde afvoergaten (5b); en waarbij de blaasbladen (6) gerangschikt zijn op een buitenzijde van het eerste afvoergat (1c).1. Large centrifugal cleaning and screening device for a mower-harvester, comprising a centrifugal cylinder (1), a main shaft (2), a guide blade (3) and a drive system (4), the centrifugal cylinder (1 ) is provided with a feed hole (1a), a transport channel (1b) and a first discharge hole (1c); the main shaft (2) being arranged on an axis of the centrifugal cylinder (1) in a penetrating manner; wherein the guide blade (3) is arranged on the main shaft (2) and pushes against an inner wall of the centrifugal cylinder (1); the drive system (4) being connected to one end of the feed hole (1a) of the centrifugal cylinder (1); wherein a secondary screening device is further arranged on an outer side of the centrifugal cylinder (1), the secondary screening device comprising a housing (5) and blowing blades (6), the housing (5) being arranged on an outer side of the centrifugal cylinder ( 1) in a wraparound manner and wherein the housing (5) is internally provided with adjacent second drain holes (5a) and third drain holes (5b); and wherein the blowing blades (6) are arranged on an outer side of the first discharge hole (1c). 2. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 1, waarbij de centrifugale cilinder (1) in een vorm is van een omgekeerde cirkelvormige afgeknotte kegel, waarbij het transportkanaal (1b) een veelheid van eerste doorgaande gaten (1b1) omvat die gelijkmatig verdeeld zijn op de centrifugale cilinder (1) en waarbij de centrifugale cilinder (1) verder voorzien is van een veelheid van eerste versterkingsribben (1d).A large harvester centrifugal cleaning and screening device according to claim 1, wherein the centrifugal cylinder (1) is in an inverted circular truncated cone shape, the conveying channel (1b) having a plurality of first through holes (1b1) evenly distributed on the centrifugal cylinder (1) and wherein the centrifugal cylinder (1) is further provided with a plurality of first reinforcing ribs (1d). 3. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 1, waarbij het aandrijfsysteem (4) bestaat uit een eerste drijfwerk (4a), een tweede drijfwerk (4b), een vertraagmiddel (4c) en een eerste motor (4d) omvat, waarbij het eerste drijfwerk (4a) gerangschikt is op een buitenzijde van het afvoergat van de centrifugale cilinder (1) op een ommantelende wijze en waarbij het tweede drijfwerk (4b) gerangschikt is op één zijde van het eerste drijfwerk (4a) en in elkaar grijpt met het eerste drijfwerk (4a); waarbij het vertraagmiddel (4c) zich onder het tweede drijfwerk (4b) bevindt en verbonden is met het tweede drijfwerk (4b); en waarbij de eerste motor (4d) gerangschikt is op de behuizing (5) en waarbij een uitvoereind van de eerste motor (4d) opwaarts gericht is en verbonden is met het vertraagmiddel (4c).A large harvester centrifugal cleaning and screening machine according to claim 1, wherein the drive system (4) consists of a first gear (4a), a second gear (4b), a retarder (4c) and a first motor (4d), the first gear (4a) being arranged on an outer side of the discharge hole of the centrifugal cylinder (1) in a sheathing manner and the second gear (4b) being arranged on one side of the first gear ( 4a) and meshes with the first gear (4a); wherein the deceleration means (4c) is located below the second gear (4b) and is connected to the second gear (4b); and wherein the first motor (4d) is arranged on the housing (5) and an output end of the first motor (4d) faces upward and is connected to the deceleration means (4c). 4. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 3, waarbij het eerste drijfwerk (4a) voorzien is van een veelheid van gelijkmatig verdeelde eerste sleuven (4al) en waarbij een bovenste eind van het toevoergat (la) verder voorzien is van eerste pinnen (lal) die met de eerste sleuven in hoeveelheid consistent zijn en één-op-één overeenkomen met de eerste sleuven.A large harvester centrifugal cleaning and screening machine according to claim 3, wherein the first gear (4a) has a plurality of evenly spaced first slots (4al) and an upper end of the feed hole (1a ) is further provided with first pins (1al) which are consistent in quantity with the first slots and correspond one-to-one with the first slots. 5. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 1, waarbij een eerste groef (le) en een tweede groef (lf) respectievelijk verschaft zijn op verbindingen van bovenste en onderste eindes van de behuizing (5) en de centrifugale cilinder (1), waarbij een eerste lager (1e1} en een tweede lager (1f) respectievelijk gerangschikt zijn in de eerste groef (1e) en de tweede groef (1f) en waarbij twee eindes van de eerste lager (lel) en de twee eindes van de tweede lager (1f1) vast verbonden zijn met respectievelijk een binnenwand van de behuizing (5) en een buitenoppervlak van de centrifugale cilinder (1).A large harvester centrifugal cleaning and screening device according to claim 1, wherein a first groove (1e) and a second groove (1f) are respectively provided on joints of upper and lower ends of the housing (5) and the centrifugal cylinder (1), wherein a first bearing (1e1} and a second bearing (1f) are respectively arranged in the first groove (1e) and the second groove (1f), and two ends of the first bearing (11) and the two ends of the second bearing (1f1) are fixedly connected to an inner wall of the housing (5) and an outer surface of the centrifugal cylinder (1) respectively. 6. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 5, waarbij de behuizing (5) bestaat uit een eerste schot (5c), een tweede schot (5d) en een derde schot (5e), waarbij het eerste schot (5c) coaxiaal is met de centrifugale cilinder (1) en gerangschikt is op een buitenzijde van de centrifugale cilinder (1), waarbij één eind van het eerste schot (5c) dicht gehecht is aan een buitenzijde van het eerste afvoergat, waarbij het eerste schot (5c) de buitenzijde van het eerste afvoergat (Ic) op een schuin- neerwaartse wijze omgeeft, en waarbij één eind van het eerste schot (5c) dicht gehecht is aan de buitenzijde van het eerste afvoergat (1c); waarbij het tweede schot (5d) bestaat uit een eerste schuine plaat (5d1) en een eerste scheidingsplaat (5d2), waarbij de eerste schuine plaat (5d1) en de eerste scheidingsplaat (5d2) coaxiaal zijn met de centrifugale cilinder (1) en gerangschikt zijn op een buitenzijde van de centrifugale cilinder (1), waarbij één eind van de eerste schuine plaat (5d1) dicht gehecht is aan een buitenzijde van het toevoergat (1a), waarbij de eerste schuine plaat (5d1) een buitenzijde van de centrifugale cilinder (1) omgeeft op een schuin-neerwaartse wijze en waarbij de eerste scheidingsplaat (5d2) gerangschikt is op het andere eind van de eerste schuine plaat (5d1) op een neerwaartse gestrekte wijze; en waarbij het derde schot (5e) bestaat uit een tweede schuine plaat (Sel) en een tweede scheidingsplaat (5e2), waarbij de tweede schuine plaat (Sel) en de tweede scheidingsplaat (5e2) coaxiaal zijn met de centrifugale cilinder (1) en gerangschikt zijn op een buitenzijde van de centrifugale cilinder (1), waarbij de tweede schuine plaat (5el) in het midden van de centrifugale cilinder (1) en op één zijde weg van de centrifugale cilinder (1) op een schuin-neerwaartse wijze gerangschikt is en niet snijdt met een tweede verticale plaat en waarbij de tweede scheidingsplaat (5e2) gerangschikt is op het andere eind van de tweede schuine plaat (5el) op een neerwaarts gestrekte wijze.A large harvester centrifugal cleaning and screening device according to claim 5, wherein the housing (5) consists of a first baffle (5c), a second baffle (5d) and a third baffle (5e), wherein the first baffle (5c) is coaxial with the centrifugal cylinder (1) and arranged on an outer side of the centrifugal cylinder (1), one end of the first baffle (5c) being tightly bonded to an outer side of the first discharge hole, wherein the first baffle (5c) surrounds the outside of the first drain hole (Ic) in a downward sloping manner, and wherein one end of the first baffle (5c) is closely bonded to the outside of the first drain hole (1c); wherein the second baffle (5d) consists of a first oblique plate (5d1) and a first separator plate (5d2), the first oblique plate (5d1) and the first separator plate (5d2) being coaxial with the centrifugal cylinder (1) and arranged being on an outer side of the centrifugal cylinder (1), one end of the first oblique plate (5d1) being closely adhered to an outer side of the feed hole (1a), the first oblique plate (5d1) being an outer side of the centrifugal cylinder (1) surrounds in a slant-down manner and the first partition plate (5d2) is arranged on the other end of the first slant plate (5d1) in a downward stretched manner; and wherein the third baffle (5e) consists of a second oblique plate (Sel) and a second separator plate (5e2), the second oblique plate (Sel) and the second separator plate (5e2) being coaxial with the centrifugal cylinder (1), and arranged on an outer side of the centrifugal cylinder (1), with the second oblique plate (5el) in the center of the centrifugal cylinder (1) and on one side away from the centrifugal cylinder (1) arranged in a slant-down manner and does not intersect with a second vertical plate and wherein the second partition plate (5e2) is arranged on the other end of the second inclined plate (5el) in a downwardly stretched manner. 7. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 6, waarbij de behuizing (5) verder voorzien is van tweede versterkingsribben (5f), derde versterkingsribben (5g) en vierde versterkingsribben (5h), waarbij er een veelheid van tweede versterkingsribben (5f) is, waarbij de veelheid van tweede versterkingsmiddelen (5f) gelijkmatig verdeeld zijn rond een bovenste eind van de tweede schuine plaat (Sel) en waarbij twee eindes van de tweede versterkingsribben (5f) vast verbonden zijn met respectievelijk een binnenwand van de eerste schuine plaat (5d1) en een buitenoppervlak van het eerste schot (5c); waarbij er een veelheid van derde versterkingsribben (5g) is, waarbij de veelheid van derde versterkingsribben (5g) vast verbonden is met respectievelijk een bovenste eind van de eerste schuine plaat en een bovenste eind van het eerste schot (Sc); en waarbij er een veelheid van vierde versterkingsribben (5h) is, waarbij de veelheid van vierde versterkingsribben gelijkmatig verdeeld is rond de tweede afvoergaten (5a) en de derde afvoergaten (5b) en waarbij eerste gekromde oppervlakken (Sh1l) van de vierde versterkingsribben (5h) boogvormig zijn.A large harvester centrifugal cleaning and screening device according to claim 6, wherein the housing (5) further comprises second reinforcing ribs (5f), third reinforcing ribs (5g) and fourth reinforcing ribs (5h), wherein there are is a plurality of second reinforcing ribs (5f), the plurality of second reinforcing means (5f) being evenly distributed around an upper end of the second inclined plate (Sel), and wherein two ends of the second reinforcing ribs (5f) are fixedly connected to respective an inner wall of the first inclined plate (5d1) and an outer surface of the first baffle (5c); wherein there is a plurality of third reinforcing ribs (5g), the plurality of third reinforcing ribs (5g) being fixedly connected to an upper end of the first oblique plate and an upper end of the first baffle (Sc), respectively; and wherein there is a plurality of fourth reinforcing ribs (5h), wherein the plurality of fourth reinforcing ribs are evenly distributed around the second drain holes (5a) and the third drain holes (5b), and wherein first curved surfaces (Sh1l) of the fourth reinforcing ribs (5h ) are arcuate. 8. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 6, waarbij het eerste schot (5c) voorzien is van een veelheid van tweede doorgaande gaten (5cl1), waarbij de veelheid van tweede doorgaande gaten (5cl) gelijkmatig verschaft is op het eerste schot (5c) en waarbij de veelheid van tweede doorgaande gaten (5c1) geconcentreerd is op een positie tussen het bovenste eind van de tweede schuine plaat en de centrifugale cilinder (1).A large harvester centrifugal cleaning and screening device according to claim 6, wherein the first baffle (5c) is provided with a plurality of second through holes (5cl1), the plurality of second through holes (5cl) is uniformly provided on the first baffle (5c) and wherein the plurality of second through holes (5c1) are concentrated at a position between the upper end of the second oblique plate and the centrifugal cylinder (1). 9. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 1, waarbij een onderste eind van de centrifugale cilinder (1) voorzien is van een verticaal-neerwaartse eerste convexe deel (1g), waarbij een buitenoppervlak van het convexe deel (1g) voorzien is van een veelheid van gelijkmatig verdeelde tweede sleuven (1gl), waarbij de blaasbladen (6) voorzien zijn van tweede pinnen (6a) die overeenkomen met de tweede sleuven, waarbij twee eindes van elk van de tweede sleuven (6a) voorzien zijn van tweede convexe delen (192), waarbij de tweede convexe delen (182) voorzien zijn van gelijkmatig verdeelde eerste van schroefdraad voorziene gaten (193) en waarbij de blaasbladen (6) voorzien zijn van overeenkomende tweede van schroefdraad voorziene bladen (6b) die consistent zijn met de eerste van schroefdraad voorziene gaten in hoeveelheid.A large harvester centrifugal cleaning and screening device according to claim 1, wherein a lower end of the centrifugal cylinder (1) is provided with a vertical-downward first convex portion (1g), an outer surface of the convex part (1g) is provided with a plurality of evenly spaced second slots (1gl), the bladder blades (6) being provided with second pins (6a) corresponding to the second slots, two ends of each of the second slots ( 6a) are provided with second convex portions (192), the second convex portions (182) being provided with evenly spaced first threaded holes (193) and the bladder blades (6) being provided with corresponding second threaded blades ( 6b) consistent with the first threaded holes in quantity. 10. Grote centrifugale reinigings-en-zeef-inrichting voor een maai-oogstmachine volgens conclusie 1, waarbij de behuizing (5) verder voorzien is van een veelheid van derde van schroefdraad voorziene gaten (511) en waarbij de twee derde pinnen (51) symmetrisch gerangschikt zijn ten opzichte van de behuizing (5).A large harvester centrifugal cleaner and screener as claimed in claim 1, wherein the housing (5) further includes a plurality of third threaded holes (511) and wherein the two third pins (51) arranged symmetrically with respect to the housing (5).
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