WO2005102026A1 - Venting of a combine harvester - Google Patents
Venting of a combine harvester Download PDFInfo
- Publication number
- WO2005102026A1 WO2005102026A1 PCT/CA2005/000596 CA2005000596W WO2005102026A1 WO 2005102026 A1 WO2005102026 A1 WO 2005102026A1 CA 2005000596 W CA2005000596 W CA 2005000596W WO 2005102026 A1 WO2005102026 A1 WO 2005102026A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- straw
- housing
- hood
- chopper
- combine harvester
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D41/00—Combines, i.e. harvesters or mowers combined with threshing devices
- A01D41/12—Details of combines
-
- 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
- A01F12/40—Arrangements of straw crushers or cutters
Definitions
- This invention relates to a combine harvester and to arrangements for reducing the pressure differential between the internal body of the combine harvester and the exterior.
- BACKGROUND OF THE INVENTION Combine development in recent years have put greater demands on the straw choppers and chaff spreaders. The main reasons are that larger combines and wider cutting widths are creating higher flows of straw and chaff; wider cutting widths create more demanding spreading widths; reduced tilling practices have put more demand on even spreading of both straw and chaff and that plant breeding has resulted in tougher straw, higher yields and more residue. Large capacity combines have remained the same physical size as previous models. This means that a greater flows of grain, chaff and straw are moving through the same sized cavities.
- the airflow off the sieves carries the chaff and light partials into a chaff spinner or straw chopper.
- the airflow trajectory needs to remain substantially rearward so it will not create vortices or non laminar flow across the sieves with the potential of creating a dirty sample.
- the current John Deere STS combine is perhaps the most extreme example of a compact machine. In this case Deere has added a small opening in the sidewall of the combine, nearly perpendicular to the end of the sieves and substantially immediately at the end of the sieves.
- a combine harvester comprising: a housing; a straw separating system mounted within the housing for separating seed materials from straw for collection of the seed materials and for transport of the straw rearwardly toward a rear of the housing for discharge; the housing having a rear hood with a bottom opening in the hood for discharge of the straw and the lighter materials; a straw chopper mounted at the rear hood for receiving the straw and having a rotor for chopping the straw and for generating a stream of chopped straw for spreading the chopped straw and at least one vent opening at the rear hood arranged to allow air to pass between the rear hood and the exterior through the at least one opening.
- the chopper is of the type which generates an air stream with the straw so that some or in many case the majority of the air is carried through the chopper.
- the vent opening or openings allow excess air which cannot be drawn away by the chopper to escape without causing back pressure in the hood.
- the vents can be used to allow airflow into the chopper to satisfy the air requirements of the chopper without airflow being drawn from the sieves, which can interfere with the proper operation of the sieves.
- the arrangement includes a sieve assembly mounted within the housing below the straw separation system for receiving the seed materials and for separating from the seed materials heavier seeds which fall through the sieve assembly for collection and lighter materials, the sieve assembly having an air flow system for generating an air flow through the sieve assembly and a rear edge over which the lighter materials are discharged in the air flow and the chopper and the vents are arranged rearwardly of the sieve assembly.
- the at least one vent opening is located in the hood adjacent the straw chopper.
- the at least one vent opening includes a first and a second vent opening each arranged in a respective side wall of the hood adjacent the straw chopper.
- the straw chopper has a housing attached to the hood and the at least one vent opening is located in the chopper housing.
- the chopper housing includes two side walls and wherein there is a vent opening in each side wall.
- the side wall includes a mounting flange at its top edge for attachment to the bottom of the hood and wherein the vent openings include a plurality of horizontal slots at spaced positions directly below the mounting flange.
- the chopper housing includes a rear wall extending transversely across the hood and wherein there is a vent opening in the rear wall.
- the rear wall is mounted below the bottom of the hood and the vent openings include a plurality of horizontal slots at spaced positions directly below the hood.
- the at least one vent opening includes a plurality of louvers and the louvers are arranged such that they are inclined upwardly and outwardly so as to be angled opposite of the downward direction of flow of the straw.
- a pneumatic fan having a duct connected to the at least one vent opening for driving air through the at least one vent opening.
- the fan may be arranged such that the duct is either an inlet to or an outlet from the fan to drive the air either inwardly or outwardly depending upon requirements
- the fan has an outlet duct which transports the air from the fan to be mixed with the stream of air and chopped straw.
- a combine harvester having: a housing; a straw separating system mounted within the housing for separating seed materials from straw for collection of the seed materials and for transport of the straw rearwardly toward a rear of the housing for discharge; the housing having a rear hood with a bottom opening in the hood for discharge of the straw; an apparatus comprising a straw chopper having a housing arranged to be mounted at the rear hood for receiving the straw and lighter materials and a rotor mounted in the housing for chopping the straw and for generating a stream of air and chopped straw for spreading the chopped straw; the housing having at least one vent opening arranged to cause air from the sieve assembly to move rearwardly from the rear edge into the rear hood and to discharge from the rear hood through the at least one opening.
- the arrangement defined above thus provides additional air exhausting locations substantially close to the straw chopper.
- the airflow carries the straw and chaff to the chopper and then the air is exhausted.
- air flows through the sieve with the trajectory remaining substantially rearward so that the grain sample is not compromised.
- an apparatus for mounting on a combine harvester having: a housing; a straw separating system mounted within the housing for separating seed materials from straw for collection of the seed materials and for transport of the straw rearwardly; the housing having a rear hood behind the straw separating system and the straw chopper with a bottom opening in the hood for discharge of the straw and the lighter materials; the apparatus comprising a straw chopper having a housing arranged to be mounted directly below the straw separation system for receiving the straw and lighter materials and a rotor mounted in the housing for chopping the straw and for generating a stream of air and chopped straw for spreading the chopped straw; the housing having at least one vent opening arranged to allow air from outside the combine harvester to be drawn into the housing to supply air for discharge with the chopped material to move rearwardly from the chopper discharge into the rear hood and to discharge from the rear hood.
- An alternate embodiment of the third aspect of the invention includes the internal chopper with at least one vent mounted within the rotational tip diameter of the fan blades of the chopper - when in a side elevational view.
- the inlet allows air to be drawn from outside of the threshing cavity, to be pressurized and exhausted inside the threshing cavity along with the chopped material to move rearwardly from the chopper discharge into the rear hood and to discharge from the rear hood with substantial velocity to produce a wide spread.
- a combine harvester comprising: a housing; a straw separating system mounted within the housing for separating seed materials from straw for collection of the seed materials and for transport of the straw toward the outlet of the housing for discharge; a sieve assembly mounted within the housing below the straw separation system for receiving the seed materials and for separating from the seed materials heavier seeds which fall through the sieve assembly for collection and lighter materials, the sieve assembly having an air flow system for generating an air flow through the sieve assembly and a rear edge over which the lighter materials are discharged in the air flow; the housing having a rear hood with an opening in the hood for discharge of the straw and the lighter materials; a straw chopper mounted at the hood for receiving the straw and lighter materials for chopping the straw and for generating a stream of chopped straw for spreading the chopped straw; the straw chopper having a transverse hub rotatable about a transverse axis and carrying a plurality of axially spaced blades for rotation with the hub about the axis so
- Figure 1 is a schematic side elevational view of a combine harvester and straw chopper according to the present invention.
- Figure 2 is a schematic side elevational view similar to that of Figure 1 showing the internal components in phantom.
- Figure 3 is an isometric view of the straw chopper and combine of Figure 1.
- Figure 4 is an isometric of the chopper alone and including a rear vent cover.
- Figure 5 is a similar isometric view showing an arrangement with vent openings both in the rear wall and side walls of the chopper housing, with the rear vent cover removed.
- Figure 6 is a top plan view of the chopper of Figure 3 showing a duct and fan arrangement for transporting the vented air.
- Figure 7 is an isometric view similar to that of Figure 3 showing an arrangement in which the vent opening are in the side walls of the rear hood.
- Figure 8 is a side elevational view of an arrangement using an internal chopper in which the vent openings are arranged in the side walls of the chopper.
- DETAILED DESCRIPTION A combine harvester shown in Figure 1 comprises a combine harvester housing 10 mounted on ground wheels 11 for transport over a ground in conventional manner. The combine harvester is shown only schematically since many different designs are available and well known to one skilled in the art.
- the combine harvester includes a straw separation section generally indicated at 12 and a sieve section generally indicated at 13.
- the rear of the combine is provided is a rear hood 14 into which air from the straw separation system and the sieves enters and into which straw is discharged rearwardly for and is guided * by guide wall 14A and by operable guide panel 14B in the hood section 14 into a chopper and spreader generally indicated at 15.
- This arrangement is well known and commercial products are readily available from Redekop Manufacturing and other manufacturers of straw choppers of this type.
- the chaff from the rear end of the sieve as best shown in Figure 2 at 13 is carried by a movable pan 16 and a chaff control door 16A into the inlet 32 of the chopper 14.
- a chopper of this type is disclosed in US Patents 6,478,674 issued Nov 12 lh 2002, 5,482,508 issued Jan 9 th 1996 and 5,232,405 issued August 3 rd 1993 all of Leo Redekop, and US application 2002/0004417 published Jan 10 th 2002 the disclosures of which are incorporated herein by reference.
- the chopper has a horizontal upper mounting flange 25 which attaches to a corresponding bottom flange of the hood of the combine.
- the chopper comprises a housing attached to the top mounting flange and depending therefrom and defined by side walls 26 at opposite sides of the hood and generally co-planar therewith. Bridging the side walls 26 is provided a bottom wall 22 and a top wall 21 which extend across the width of the chopper and form a generally cylindrical containing surface for receiving the chopper rotor 20.
- the rotor 20 includes a hub 28 with a plurality of radially extending flails or blades 29 carried on the rotor for rotation therewith around the axis of the rotor which is arranged across the width of the chopper.
- a hub 28 with a plurality of radially extending flails or blades 29 carried on the rotor for rotation therewith around the axis of the rotor which is arranged across the width of the chopper.
- Many different arrangements and construction of blades can be used as are well known to one skilled in the art and described in the above patents of Redekop.
- the chopper includes stationary blades 30 mounted on the bottom wall 22 at a position partway around the bottom wall. The stationary blades are arranged in a row at spaced positions across the width of the chopper so as to co-operate with the rotating blades of the hub in a chopping action.
- the spacing between the blades can be selected in accordance with the type of rotating blades as is well known to one skilled in the art.
- the top wall 21 and the bottom wall 22 define at the upper part of the housing the inlet 32 into which the straw can be guided from the hood and from the sieve
- the chaff guide plate 16 and control door 16A carry the chaff from the end of the sieve over the space between the end of the sieve and the front edge 36 of the bottom wall 22 so as to carry the chaff in the air stream from the sieve over the plate and into the opening 32.
- the top wall 21 includes a generally vertical portion 37 which extends downwardly from the top flange 25 to the top of the rotor.
- the top wall 21 further includes a curved section 38 which extends around the top of the rotor to a rear edge 39 which defines the top edge of the rear discharge opening 40 through which the material exits in the stream of air and chopped materials generated by the rotation of the rotor within the housing.
- a tailboard 41 is pivotally mounted on the rear part of the housing at a pivot mount 41 A.
- the tailboard comprises a base plate 42 with a series of fins 43 on the underside shaped and arranged so that material exiting from the discharge opening 40 is thrown up against the underside of the tailboard and impacts the fins causing a change in direction of the material on the tailboard so as to spread the material using the momentum generated in the stream from the rotor.
- the angle of the tailboard can be adjusted around the pivot 41 A by positioning a spring loaded pin.
- the load of the tailboard is counteracted with a gas cylinder 44.
- Rear vents 115 and side vents 116 are provided in the chopper housing.
- the rear vents 115 are covered by an inclined rear cover panel 125 which is removable.
- the vents form a series of horizontal parallel slots in the side wall with the first immediately at the top mounting flange.
- the vents consist of louvers that are angled outwards and upwards, as best shown in the isometric views, so as to be opposite to the downwards direction of the straw flow path. This is necessary to eliminate straw from plugging the vent holes.
- the vents can be provided solely in the side walls of the chopper housing or can be provided solely in the rear wall or in both.
- the vents are above and forward of the inlet 32 so as to act on the air in advance of the materials entering the inlet of the chopper.
- the straw chopper has a transverse hub rotatable about a transverse axis and carrying a plurality of axially spaced blades for rotation with the hub about the axis so as to define an imaginary vertical plane marked at IP parallel to and in front of the axis A which is the forwardmost plane which tips of the blades 29 reach.
- the side vent openings 116 have at least a portion thereof rearward of the imaginary vertical plane IP and arranged to allow air to pass between the rear hood and the exterior through the at least one vent opening.
- each slot defining the vent openings includes a part of the slot which is rearward of the plane IP and part in front.
- the slots at the top are longer so as to include a longer part rearward.
- the slots are symmetrical about a center line so that they gradually become shorter from the uppermost slot at the flange 25 to the bottom slot blow the top of the rotor.
- the vents are located above the chopper rotor and particularly above the inlet thereto so that the air which is not drawn into the inlet because of pressurization in the hood can escape through the vents. Inversely, if the chopper is drawing more air than is being supplied by the sieves, air will be drawn in, through the vents, thereby not limiting the chopper's performance and also not drawing additional air from the sieves and grain with it. It is important to note that the vents do not need to be in the chopper housing.
- vents can be placed in the hood of the combine substantially close to the chopper or immediately above the mounting flange of the chopper as shown at vents 136 in Figure 7.
- the air should be vented / drawn-in as close as possible to the chopper so that the air moving rearwardly from the rear end of the straw separation system and rearwardly from the rear edge of the sieve assembly carries the chaff and straw to the chopper assembly.
- the vents also may be partly in the hood and partly in the chopper. As shown the vents are preferably louvers but there could be many possible shapes such as round like a cheese grater.
- the important part of the construction is that there is a void to allow air either in or out, with some mechanism to stop the straw from coming out or it plugging in the void.
- the holes are preferably oriented perpendicular to the direction of the straw flow so as to better control the escape of air without allowing straw to enter the vent with the potential of plugging.
- the vents in the side wall are connected to the inlet duct 145 of a pneumatic fan 150 mounted to draw air out of the combine hood thereby reducing the pressurized effect.
- the outlet of the fan provides pressurized air to a duct 151 which increases in width to a slot 152 at the discharge 40 to assist in providing an increased air flow from the discharge over the fins of the tailboard for spreading.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Threshing Machine Elements (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005235449A AU2005235449A1 (en) | 2004-04-23 | 2005-04-19 | Venting of a combine harvester |
EP05735613A EP1755371A4 (en) | 2004-04-23 | 2005-04-19 | Venting of a combine harvester |
EA200601923A EA009633B1 (en) | 2004-04-23 | 2005-04-19 | Venting of a combine harvester |
BRPI0510125-5A BRPI0510125A (en) | 2004-04-23 | 2005-04-19 | combine harvester |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002465143A CA2465143C (en) | 2004-04-23 | 2004-04-23 | Venting of a combine harvester |
CA2465143 | 2004-04-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005102026A1 true WO2005102026A1 (en) | 2005-11-03 |
Family
ID=35196643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2005/000596 WO2005102026A1 (en) | 2004-04-23 | 2005-04-19 | Venting of a combine harvester |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1755371A4 (en) |
AU (1) | AU2005235449A1 (en) |
BR (1) | BRPI0510125A (en) |
CA (1) | CA2465143C (en) |
EA (1) | EA009633B1 (en) |
UA (1) | UA84912C2 (en) |
WO (1) | WO2005102026A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3335545A1 (en) * | 2016-12-16 | 2018-06-20 | CLAAS Selbstfahrende Erntemaschinen GmbH | Modular drum house |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10986777B2 (en) * | 2018-04-25 | 2021-04-27 | Cnh Industrial America Llc | Vented side member for an agricultural vehicle |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3165133A (en) * | 1962-01-04 | 1965-01-12 | Int Harvester Co | Protective structure for crop treating apparatus |
US4056107A (en) * | 1976-04-26 | 1977-11-01 | Sperry Rand Corporation | Crop residue deflector means |
US4412549A (en) | 1981-10-29 | 1983-11-01 | Sperry Corporation | Combine harvester with improved cleaning |
US4637406A (en) * | 1984-08-09 | 1987-01-20 | Hesston Corporation | Chaff and straw spreading attachment for combines |
US5232405A (en) | 1992-01-07 | 1993-08-03 | Redekop Leo L | Apparatus for chopping and discharging straw from a combine harvester |
US5482508A (en) | 1995-03-31 | 1996-01-09 | Redekop; Leo L. | Apparatus for chopping and discharging straw from a combine harvester |
WO1997008937A1 (en) * | 1995-09-06 | 1997-03-13 | Rekordverken Sweden Ab | Arrangement in cutting machine |
US20020004417A1 (en) | 1999-11-24 | 2002-01-10 | Leo Redekop | Apparatus for chopping and discharging straw from a combine harvester |
US6558252B2 (en) | 2000-08-01 | 2003-05-06 | Claas Selbstfahrende Erntemaschinen Gmbh | Blower for combine harvesters having a separation unit |
US6656038B1 (en) * | 1999-07-06 | 2003-12-02 | Rekordverken Sweden Ab | Combine harvester having a straw chopper and husk discharger |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE411414B (en) * | 1977-12-16 | 1979-12-27 | Gronbergs Gjuteri & Kvarnfab | DEVICE FOR SCREEN MACHINES FOR HARVEST PANTS |
-
2004
- 2004-04-23 CA CA002465143A patent/CA2465143C/en not_active Expired - Lifetime
-
2005
- 2005-04-19 UA UAA200611104A patent/UA84912C2/en unknown
- 2005-04-19 EA EA200601923A patent/EA009633B1/en not_active IP Right Cessation
- 2005-04-19 WO PCT/CA2005/000596 patent/WO2005102026A1/en not_active Application Discontinuation
- 2005-04-19 BR BRPI0510125-5A patent/BRPI0510125A/en not_active Application Discontinuation
- 2005-04-19 AU AU2005235449A patent/AU2005235449A1/en not_active Abandoned
- 2005-04-19 EP EP05735613A patent/EP1755371A4/en not_active Withdrawn
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3165133A (en) * | 1962-01-04 | 1965-01-12 | Int Harvester Co | Protective structure for crop treating apparatus |
US4056107A (en) * | 1976-04-26 | 1977-11-01 | Sperry Rand Corporation | Crop residue deflector means |
US4412549A (en) | 1981-10-29 | 1983-11-01 | Sperry Corporation | Combine harvester with improved cleaning |
US4637406A (en) * | 1984-08-09 | 1987-01-20 | Hesston Corporation | Chaff and straw spreading attachment for combines |
US5232405A (en) | 1992-01-07 | 1993-08-03 | Redekop Leo L | Apparatus for chopping and discharging straw from a combine harvester |
US5482508A (en) | 1995-03-31 | 1996-01-09 | Redekop; Leo L. | Apparatus for chopping and discharging straw from a combine harvester |
WO1997008937A1 (en) * | 1995-09-06 | 1997-03-13 | Rekordverken Sweden Ab | Arrangement in cutting machine |
US6656038B1 (en) * | 1999-07-06 | 2003-12-02 | Rekordverken Sweden Ab | Combine harvester having a straw chopper and husk discharger |
US20020004417A1 (en) | 1999-11-24 | 2002-01-10 | Leo Redekop | Apparatus for chopping and discharging straw from a combine harvester |
US6478674B2 (en) | 1999-11-24 | 2002-11-12 | Leo Redekop | Apparatus including twisted blades passing between stationary blades for chopping and discharging straw from a combine harvester |
US6558252B2 (en) | 2000-08-01 | 2003-05-06 | Claas Selbstfahrende Erntemaschinen Gmbh | Blower for combine harvesters having a separation unit |
Non-Patent Citations (1)
Title |
---|
See also references of EP1755371A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3335545A1 (en) * | 2016-12-16 | 2018-06-20 | CLAAS Selbstfahrende Erntemaschinen GmbH | Modular drum house |
RU2747382C2 (en) * | 2016-12-16 | 2021-05-04 | КЛААС Зельбстфаренде Эрнтемашинен ГмбХ | Self-propelled combine harvester housing wall, housing and self-propelled combine harvester thresher |
Also Published As
Publication number | Publication date |
---|---|
EP1755371A4 (en) | 2008-01-23 |
CA2465143C (en) | 2009-04-28 |
EA200601923A1 (en) | 2007-04-27 |
AU2005235449A1 (en) | 2005-11-03 |
EP1755371A1 (en) | 2007-02-28 |
EA009633B1 (en) | 2008-02-28 |
BRPI0510125A (en) | 2007-06-26 |
CA2465143A1 (en) | 2005-10-23 |
UA84912C2 (en) | 2008-12-10 |
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