WO2016048124A1 - The concave for threshing machines of cereal crops - Google Patents

The concave for threshing machines of cereal crops Download PDF

Info

Publication number
WO2016048124A1
WO2016048124A1 PCT/LT2015/000002 LT2015000002W WO2016048124A1 WO 2016048124 A1 WO2016048124 A1 WO 2016048124A1 LT 2015000002 W LT2015000002 W LT 2015000002W WO 2016048124 A1 WO2016048124 A1 WO 2016048124A1
Authority
WO
WIPO (PCT)
Prior art keywords
concave
threshing
drum
rpb
cereal crops
Prior art date
Application number
PCT/LT2015/000002
Other languages
French (fr)
Inventor
Edvinas PUŽAUSKAS
Original Assignee
Uab "Raimana"
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Uab "Raimana" filed Critical Uab "Raimana"
Publication of WO2016048124A1 publication Critical patent/WO2016048124A1/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
    • A01F12/18—Threshing devices
    • A01F12/28—Devices for adjusting the concaves

Definitions

  • the invention belongs to agricultural machinery, namely, to mechanisms of threshing machines of cereal crops.
  • the known technical solution does not ensure the complete threshing of agricultural plants - cereal crops.
  • the aim of the invention to ensure a qualitative, complete and efficient threshing process and to improve the conditions of the threshing process.
  • the plane of the concave in the threshing machine is incurved in such a way that the gap between the threshing drum and concave remains evenly decreasing over the entire length of the concave, from its beginning to its end and is directly proportional to the drum rotation angle of the threshing machine.
  • the profile of the incurved plane of the concave is determined by performing calculations according to the following formulas:
  • Rpb(q>) Rb+A(0)+k((p - ⁇ (0) ), where Rpb - the length of OA segment Rb radius of the drum
  • the invention is illustrated by the diagram (see Fig. 1), where 1 - the drum of the threshing machine, 2 - the profile of the incurved plane of the concave of the threshing machine, 3 - the gap between the drum and concave.
  • the coordinate system (X; Y) of the drawing schematically illustrates the drum of the threshing machine 1 , the profile of the concave 2, which envelopes the drum, and the gap between them 3.
  • the presented technical solution creates a possibility to ensure qualitative and complete threshing of cereal crops, which prevents losses and costs during the harvest time.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Threshing Machine Elements (AREA)

Abstract

The invention belongs to agricultural machinery. The aim of the invention: to ensure a qualitative, complete and efficient threshing process and to improve the conditions of the threshing process. In order to achieve the aim of the invention, the plane of the concave (2) in the threshing machine is incurved in such a way that the gap (3) between the threshing drum (1) and concave remains evenly decreasing over the entire length of the concave, from its beginning to its end and is directly proportional to the drum rotation angle φ.

Description

THE CONCAVE FOR THRESHING MACHINES OF CEREAL CROPS
The invention belongs to agricultural machinery, namely, to mechanisms of threshing machines of cereal crops.
It is known in the threshing machine described in the RU patent No. 21 19280, TPKK: A 01 F 7/06, A 01 F 29/00, published in 1998), a cancellated concave with a cylindrical part with cutting blades, consisting of the upper and lower parts and the mechanism that enables to change the size of the even gap/distance between the drum and concave.
The known technical solution does not ensure the complete threshing of agricultural plants - cereal crops.
The aim of the invention: to ensure a qualitative, complete and efficient threshing process and to improve the conditions of the threshing process.
In order to achieve the aim of the invention, the plane of the concave in the threshing machine is incurved in such a way that the gap between the threshing drum and concave remains evenly decreasing over the entire length of the concave, from its beginning to its end and is directly proportional to the drum rotation angle of the threshing machine. Besides, the profile of the incurved plane of the concave is determined by performing calculations according to the following formulas:
Rpb(q>)=Rb+A(0)+k((p - φ(0) ), where Rpb - the length of OA segment Rb radius of the drum
Δ(0) difference between Rb and Rpb
K the coefficient of variation of the concave plane,
which determines the change of the gap between the drum and concave for the angle measurement unit
φ - the rotation angle of the drum , φ(0), when Δ(0) k=A( φ)-Δ(0):φ,
Xpb(q>)=Rpb((p)-cos((p), kai 0<φ<2 rad
Ypb(9)-Rpb((p)-sin(q>), kai 0<φ<2 rad,
where X, Y the coordinates of the concave profile points.
The invention is illustrated by the diagram (see Fig. 1), where 1 - the drum of the threshing machine, 2 - the profile of the incurved plane of the concave of the threshing machine, 3 - the gap between the drum and concave.
The coordinate system (X; Y) of the drawing schematically illustrates the drum of the threshing machine 1 , the profile of the concave 2, which envelopes the drum, and the gap between them 3. For the threshing process to be qualitative and complete, it is important to determine the profile of the incurved plate of the concave and at the same time the incurve of the plate, so that there forms an optimal gap which determines threshing of cereal crops. It is known that when the gap between the drum and concave is the same, and the profile of the concave plate is a circle, the threshing of cereal crops is not complete. Therefore, tests were carried out and calculations according to the formulas given below were done, for the determination of the profile of the concave 2, in respect to the rotation of the axis of the drum and its rotation angle φ. It was found out that the gap 3, between the drum and concave has to be evenly decreasing from the beginning of the drum A to its end B, and directly proportional to the drum rotation angle φ.
Rpb(cp)=Rb+A(0)+k(q> - φ(0))
k=A( φ)-Δ(0):φ
Xpb((p)=Rpb((p)-cos((p), when 0<φ<2 rad
Ypb((p)=Rpb((p)-sin((p), when 0<φ<2 rad
From this follows a conclusion that the profile of the plate of the concave should not be circular and the points of the profile of the concave should not be in the same distance from the drum rotation axis.
Since cereal crops differ in their size, for the threshing process to be complete, qualitative and without losses, in each specific case calculations are performed according to the given formulas.
The presented technical solution creates a possibility to ensure qualitative and complete threshing of cereal crops, which prevents losses and costs during the harvest time.

Claims

CLAIM OF INVENTION
1. The concave for threshing machines of cereal crops consisting of the incurved plate and threshing elements, characterised in that the plate of the concave is curved so that the gap is formed between the threshing drum and concave which remains evenly decreasing over the entire length of the concave, from its beginning to its end and is directly proportional to the drum rotation angle φ of the threshing machine.
2. The concave for threshing machines of cereal crops according to the claim 1 , characterised in that the profile of the incurved plate of the concave is determined by performing calculations according to the following formulas:
Rpb(q>)=Rb+A(0)+k((p - φ(0)), where Rpb - the length of OA segment
Rb - radius of the drum
Δ(0) - difference between Rb and Rpb
k - the coefficient of variation of the concave plane,
which determines the change of the gap between the drum and concave for the angle measurement unit
φ - the rotation angle of the drum, φ(0), when Δ(0)
k=A( φ)-Δ(0):φ,
Xpb(q>)=Rpb((p) cos((p), when 0<φ<2 rad
Ypb((p)=Rpb((p)-sin((p), when 0<φ<2 rad,
where X, Y the coordinates of the concave profile points.
PCT/LT2015/000002 2014-09-26 2015-03-19 The concave for threshing machines of cereal crops WO2016048124A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LT2014111 2014-09-26
LT2014111A LT6280B (en) 2014-09-26 2014-09-26 The concave for thresfing machines of cereal crops

Publications (1)

Publication Number Publication Date
WO2016048124A1 true WO2016048124A1 (en) 2016-03-31

Family

ID=53276961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/LT2015/000002 WO2016048124A1 (en) 2014-09-26 2015-03-19 The concave for threshing machines of cereal crops

Country Status (2)

Country Link
LT (1) LT6280B (en)
WO (1) WO2016048124A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616433A (en) * 1949-07-08 1952-11-04 Deere & Co Concave-adjusting means for threshers
DE2161745B1 (en) * 1971-12-13 1973-06-07 Deere & Co., Moline, Ill. (V.St.A.) Device for adjusting the distance between the threshing drum and the concave of a combine harvester
WO2013082236A1 (en) * 2011-11-29 2013-06-06 Agco Corporation Constant pressure concave assembly in a combine harvester processing system
EP2676538A1 (en) * 2012-06-22 2013-12-25 Deere & Company Tangential threshing unit with a conveyer drum and a threshing or separating drum

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2616433A (en) * 1949-07-08 1952-11-04 Deere & Co Concave-adjusting means for threshers
DE2161745B1 (en) * 1971-12-13 1973-06-07 Deere & Co., Moline, Ill. (V.St.A.) Device for adjusting the distance between the threshing drum and the concave of a combine harvester
WO2013082236A1 (en) * 2011-11-29 2013-06-06 Agco Corporation Constant pressure concave assembly in a combine harvester processing system
EP2676538A1 (en) * 2012-06-22 2013-12-25 Deere & Company Tangential threshing unit with a conveyer drum and a threshing or separating drum

Also Published As

Publication number Publication date
LT6280B (en) 2016-07-11
LT2014111A (en) 2016-04-25

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