WO2021069607A1 - Machine de distribution agricole ayant des dispositifs de séparation pouvant fonctionner de façon hybride et simultanée - Google Patents

Machine de distribution agricole ayant des dispositifs de séparation pouvant fonctionner de façon hybride et simultanée Download PDF

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Publication number
WO2021069607A1
WO2021069607A1 PCT/EP2020/078307 EP2020078307W WO2021069607A1 WO 2021069607 A1 WO2021069607 A1 WO 2021069607A1 EP 2020078307 W EP2020078307 W EP 2020078307W WO 2021069607 A1 WO2021069607 A1 WO 2021069607A1
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WO
WIPO (PCT)
Prior art keywords
compressed air
seed
distributing machine
separating
agricultural distributing
Prior art date
Application number
PCT/EP2020/078307
Other languages
German (de)
English (en)
Inventor
Manfred ERHARD
Original Assignee
Horsch Maschinen Gmbh
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 Horsch Maschinen Gmbh filed Critical Horsch Maschinen Gmbh
Publication of WO2021069607A1 publication Critical patent/WO2021069607A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/04—Single-grain seeders with or without suction devices
    • A01C7/042—Single-grain seeders with or without suction devices using pneumatic means
    • A01C7/044—Pneumatic seed wheels
    • A01C7/046—Pneumatic seed wheels with perforated seeding discs
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
    • A01C7/081—Seeders depositing seeds in rows using pneumatic means
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
    • A01C7/10—Devices for adjusting the seed-box ; Regulation of machines for depositing quantities at intervals
    • A01C7/102—Regulating or controlling the seed rate
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/20—Parts of seeders for conducting and depositing seed
    • A01C7/206—Seed pipes

Definitions

  • the invention relates to an agricultural distributing machine and an associated operating method, preferably for single-grain sowing, with at least one compressed air generating device and a plurality of separating devices for separating row units comprising seeds (e.g. seeds).
  • seeds e.g. seeds
  • agricultural distributing machines for single-grain sowing which include a multiplicity of row units carrying separating devices.
  • the separating devices usually comprise rotatable separating members (e.g. disks or drums) for separating seeds by means of a pressure difference and are connected to seed lines which transport separated seeds to the arable land by means of a compressed air flow.
  • the compressed air flow is used here to transport isolated seeds to the arable land faster than when they fall free.
  • the flow of compressed air is often so strong that the seed is shot out of the seed lines (e.g. at speeds of over 50 km / h in some cases) and has to be braked in the seed furrow by means of catching devices (e.g. catching rollers).
  • Air-termination systems are often problematic, e.g. B. because especially in moist arable soil conditions, soil and thus also seeds can get stuck on the catching devices. This can even lead to clogging of the seed coulters.
  • WO 2010 059 101 A1 discloses e.g. B. a separating device with a rotatable separating element for separating seeds by means of a pressure difference and with a seed line for transporting separated seeds by means of a compressed air flow to the arable land.
  • the compressed air flow is generated by an overpressure, which also generates the pressure difference, in a grain chamber of the separating device.
  • the flow of compressed air is dependent on the overpressure required for the pressure difference in the granular chamber, which can be disadvantageous for some applications.
  • One object of the invention is to create an alternative and / or improved agricultural distributing machine, in particular a distributing machine with which a safe seed separation and at the same time a fast and / or safe seed distribution can be made possible and / or a distributing machine which can be adapted to different boundary conditions (e.g. different types of seed, different driving speeds, different arable soil conditions, etc.) can be flexibly adapted.
  • different boundary conditions e.g. different types of seed, different driving speeds, different arable soil conditions, etc.
  • the invention relates to an agricultural distributor, preferably for single grain sowing and / or z. B. with driving speed and / or seed type-dependent variable speed of a compressed air flow for transporting isolated seeds to the arable land.
  • the distribution machine comprises at least one compressed air generating device (for example a fan or several fans, preferably centrifugal or radial fans).
  • a compressed air generating device for example a fan or several fans, preferably centrifugal or radial fans.
  • the at least one compressed air generating device preferably comprises a suction side (e.g. an air inlet and / or a negative pressure side) and a pressure side (e.g. an air outlet and / or a positive pressure side).
  • the suction side is used for. B. to generate negative pressure
  • the pressure side z. B. is used to generate excess pressure, in particular to generate a compressed air flow.
  • the agricultural distribution machine comprises a large number of row units.
  • the respective row unit comprises (preferably carries) a separating device with a rotatable separating element (preferably a (e.g. essentially plate or plate-shaped) separating disc or a separating drum) for separating particularly granular seeds (e.g. grains, fertilizers, etc.) .) by means of a pressure difference.
  • the separating device is connected to a seed line for transporting separated seeds to the arable soil (e.g. a seed furrow).
  • the agricultural distributing machine thus comprises in particular a large number of separating devices and a large number of seed lines.
  • the transport of isolated seeds to the arable land can, for. B. in free fall and / or by means of a compressed air flow, z. B. in order to be able to transport individual seeds to the arable land faster with compressed air and / or faster than free fall.
  • the compressed air flow can, for. B. be referred to as shot air and / or z.
  • B. have speeds of greater than 5 km / h, greater than 10 km / h or greater than 15 km / h and / or speeds of less than 50 km / h, less than 40 km / h, less than 30 km / h, less than 25 km / h or less than 20 km / h.
  • the agricultural distributing machine is characterized in particular by the fact that the separating element divides the respective separating device (in particular a separating housing) into a negative pressure area and an overpressure area and the negative pressure area is connected to the suction side by means of a suction line system and the positive pressure area is connected to the suction side by means of an overpressure line system Pressure side is connected in order to simultaneously apply a (z. B. controllably changeable) overpressure and a (z. B. controllably changeable) negative pressure to the separating element of the respective separating device.
  • a separating element divides the respective separating device (in particular a separating housing) into a negative pressure area and an overpressure area and the negative pressure area is connected to the suction side by means of a suction line system and the positive pressure area is connected to the suction side by means of an overpressure line system Pressure side is connected in order to simultaneously apply a (z. B. controllably changeable) overpressure and a (z. B. controllably changeable) negative pressure to
  • the separating device of the respective row unit can be operated in particular as a hybrid, the separating element of the respective separating device being able to be acted upon actively with overpressure on the one hand and actively with negative pressure on the other.
  • the compressed air flow (in particular its speed) for transporting isolated seeds to the arable land can thus, for. B. can be set essentially independently of the separating function of the respective separating device, in particular without impairing the separating function and / or the pressure difference of the respective separating device.
  • the overpressure in the overpressure range can even be reduced to essentially 0 mbar and nevertheless the isolation function and / or can be performed by means of the underpressure a sufficient pressure difference can be maintained at the separating element of the respective separating device.
  • the negative pressure can e.g. B. mainly used and / or changed in a targeted manner in order to adjust the pressure difference at the separating element of the respective separating device.
  • the overpressure can e.g. B. mainly used and / or changed in a targeted manner in order to adjust the compressed air flow (in particular its speed) for transporting isolated seeds to the arable land.
  • overpressure from the overpressure area can be used to contribute to the pressure difference and / or to be used to generate the compressed air flow in the seed line of the respective singling device.
  • the seed line prefferably has an inlet area for the inlet of separated seeds, in particular from the respective separation device.
  • the inlet area is preferably formed in a lateral surface of the seed line, e.g. B. in a curved portion of the seed line.
  • the overpressure line system can, for. B. form a first compressed air supply in the overpressure area of the respective separating device, preferably in order to appropriately contribute to the pressure difference at the separating element.
  • a second compressed air supply can be made available in order to generate the compressed air flow in the seed line of the respective singling device.
  • the second compressed air supply (in particular also) is supplied with compressed air from the overpressure line system.
  • the second compressed air supply can, for. B. be connected to the overpressure line system in a division area, preferably upstream of the respective separating device.
  • the first compressed air supply and the second compressed air supply are supplied with compressed air by different fans.
  • a flow barrier and / or a Coanda effect is set up along the inlet area and / or compressed air from the first compressed air supply, in particular compressed air in the respective singling device, and compressed air from the second compressed air supply, in particular the compressed air flow in the seed line, on top of one another act so that compressed air from the first compressed air supply can essentially be prevented from entering the seed line via the inlet region and / or vice versa.
  • the respective separating device is connected to the at least one compressed air generating device via a ring conduit system comprising the suction conduit system and the overpressure conduit system, preferably in such a way that the at least one compressed air generating device has a large number of ring conduit systems (e.g. connected in parallel) Can apply overpressure and underpressure (e.g. at the same time).
  • suction side and / or the suction line system with an air supply device (e.g. a through hole, a pipe socket, a pipe section, etc.) for air supply expediently directly or indirectly from the atmosphere (e.g. the environment) Connection.
  • an air supply device e.g. a through hole, a pipe socket, a pipe section, etc.
  • a speed of the compressed air flow in the seed line of the respective singling device can be changed as a function of a driving speed of the agricultural distributing machine (e.g. of the respective row unit), preferably controllable (e.g. by means of a control device) and / or (e.g. B. manually) can be preset.
  • a driving speed of the agricultural distributing machine e.g. of the respective row unit
  • controllable e.g. by means of a control device
  • / or e.g. B. manually
  • a speed of the compressed air flow in the seed line of the respective singling device depends on the type of seed (e.g. information on the type of seed, shape, size and / or weight (e.g. thousand grain weight) of the seed, in particular the seed grains, etc.) is changeable, preferably controllable and / or preset (for example by means of a control device).
  • the driving speed of the agricultural distribution machine can essentially, for. B. correspond to the driving speed of the respective row unit and / or substantially correspond to the driving speed of a tractor (e.g. tractor) for pulling the agricultural distributor.
  • the travel speeds of the row units are preferably essentially identical (for example with the exception of cornering).
  • the driving speed can, for. B. in the context of the invention at suitable points (z. B. the agricultural distribution machine, in particular on one or more row units and / or a frame structure, and / or the tractor for pulling the agricultural distribution machine) appropriately recorded, measured and / or suitable Way can be determined (e.g. calculated).
  • B. at least one speed sensor (expediently on one or more row units and / or at least one speed sensor on a tractor for pulling the agricultural distributor) can be used, but also z.
  • GPS global positioning system
  • gyroscope gyroscope
  • the air supply device can, for. B. an adjusting element (e.g. a controllable valve, a manually adjustable valve (e.g. an adjusting tap) and / or an exchangeable perforated screen or other exchangeable components that change a passage cross section of the air supply device, etc.) for changing (e.g. Adjust) the air supply, in particular for changing the air volume flow to the at least one compressed air generating device.
  • an adjusting element e.g. a controllable valve, a manually adjustable valve (e.g. an adjusting tap) and / or an exchangeable perforated screen or other exchangeable components that change a passage cross section of the air supply device, etc.
  • changing e.g. Adjust
  • the adjusting element can, for. B. a controllable adjusting valve (preferably by means of a control device) and / or a manually adjustable adjusting device (e.g. an adjusting tap etc.) and / or a manually replaceable adjusting device (e.g. a perforated diaphragm etc.).
  • a controllable adjusting valve preferably by means of a control device
  • a manually adjustable adjusting device e.g. an adjusting tap etc.
  • a manually replaceable adjusting device e.g. a perforated diaphragm etc.
  • the adjusting valve preferably controllable by a control device, can, for. B. can be controlled during operation of the agricultural distributor to adjust the air supply.
  • the manually adjustable and / or interchangeable adjustment device can expediently on a z.
  • B. fixed-predefined setting can be preset.
  • an amount of air supplied via the air supply device is essentially an amount of air exiting from the seed line of the respective singling device corresponds to. From this it follows e.g. B. that the amount of air emerging from the seed lines by means of the compressed air flows can essentially be compensated for again via the air supply device.
  • This also z. B. includes embodiments with in particular leakage-dependent deviations.
  • an amount of air guided out of the respective separating device by means of the suction line system essentially corresponds to an amount of air guided into the respective separating device by means of the overpressure line system.
  • This also z. B. includes embodiments with in particular leakage-dependent deviations.
  • leakage-dependent deviations e.g. leakage losses
  • leakage-dependent deviations can e.g. B. be compensated via the feeder.
  • the ring line systems comprising the suction line system and the overpressure line system can, for. B. represent a substantially closed ring system, in particular with the exception of the air supply by means of the air supply device and the air outlet from the seed line of the respective isolation device.
  • the amount of air emerging from the seed lines can essentially be compensated for by the air supply of the air supply device.
  • a speed of the compressed air flow in the seed line of the respective singling device can be changed, but preferably the pressure difference at the singling element of the respective singling device and / or a speed the at least one compressed air generating device z. B. can remain essentially unchanged.
  • a speed of the compressed air flow in the seed line of the respective singling device can be appropriately changed, preferably without the pressure difference having to be changed (e.g. impaired) and / or z. B. without a speed of the at least one compressed air generating device having to be changed.
  • the pressure difference at the separating element of the respective separating device can essentially be controlled by means of a speed of the at least one compressed air generating device.
  • the adjusting element and / or the at least one compressed air generating device and thus preferably a speed of the compressed air flow in the seed line of the respective separating device and / or a pressure difference at the separating element of the respective separating device can, for. B. be set as a function of one or more control parameters (z. B. by means of a control device).
  • the at least one control parameter can preferably include a driving speed of the agricultural distributing machine (for example of the respective row unit, a coulter, seed line or other parts of the row unit).
  • the driving speed of the respective row unit can essentially, for. B. correspond to the driving speed of the agricultural distributor. When cornering, however, z. B. There are deviations in the driving speed of the agricultural distributor on the one hand and row units on the inside of the curve and row units on the outside of the curve on the other hand and / or there are deviations in the driving speeds between row units on the inside of the curve and row units on the outside of the curve.
  • the at least one control parameter can also, for. B. include at least one of the following: a seed variety (e.g. information on the type of seed, shape, size and / or weight (e.g. thousand grain weight) of the seed, in particular the seed grains, etc.), a sowing depth of the seed, arable soil conditions (e.g.
  • the at least one control parameter can also, for. B. include row spacings of adjacent row units.
  • an input device e.g. an operating device, a control panel, a display device, a touchscreen, a keyboard, an input field, an app, an interface (e.g. a user interface, a digital interface and / or a Data interface) and / or a mobile terminal device) is made available, by means of which an operator can provide information on the seed variety (e.g. seed type, shape, size and / or weight of the seed (e.g. thousand grain weight), in particular the seed grains, etc. ) and / or can expediently enter the at least one control parameter manually, which can apply in particular to the control parameters known to the operator or which can be determined himself, such as, for. B. seed type, sowing depth of the seed, arable soil conditions (e.g. moisture, creditworthiness, soil type, etc.) and / or whether or not a catching device is used to slow down the seed output from the seed line.
  • seed variety e.g. seed type, shape, size and / or weight of the seed (e.g
  • z. B. a detection system (z. B. sensor system, vehicle assistance system and / or GPS etc.) for the automatic (expedient direct or indirect) detection of the at least one control parameter, the driving speed and / or Information on the seed variety (e.g. seed type, shape, size and / or weight of the seed, in particular the seed grains, etc.) must be made available.
  • the detection can expediently z. B. a detecting, but also z. B. comprise determining (e.g. calculating or deriving).
  • the agricultural distributing machine prefferably has at least two detection devices for detecting a driving speed of at least two row units in order to be able to detect different driving speeds of a row unit on the inside of the curve and a row unit on the outside of the curve when cornering.
  • the detection system and / or the detection devices can be used to detect the driving speed, for. B. at least one radar sensor, a global positioning system (GPS), at least one acceleration sensor, at least one speed sensor and / or at least one rotation rate sensor (z. B. gyroscope).
  • GPS global positioning system
  • acceleration sensor at least one acceleration sensor
  • speed sensor at least one speed sensor
  • rotation rate sensor z. B. gyroscope
  • From the seed line of the respective singling device dispensed (z. B. spouting or emerging) seed can, for. B. have a horizontal speed component and a vertical speed component, z. B. form an overall speed component.
  • the speed components are preferably exit speed components.
  • a speed of the compressed air flow in the seed line of the respective separating device can, for. B. depending on the driving speed and / or seed type-dependent (preferably by means of the adjusting element) can be changed, z. B. in order to be able to adapt a particularly essentially horizontal speed component (in particular exit speed component) of the seed dispensed from the seed line of the respective singling device to the driving speed, e.g. B. to a relative speed between in particular the essentially horizontal speed component (in particular exit
  • Speed component and the driving speed of less than 25km / h, less than 20 km / h, less than 15km / h or less than 10km / h, or even to substantially equalize, e.g. B. so that the particular horizontal speed component (in particular exit speed component) can essentially correspond to the driving speed.
  • a speed of the compressed air flow in the seed line of the respective singling device is essentially independent of the pressure difference on the Isolation member of the respective isolation device and / or can be changed essentially independently of a speed of the at least one compressed air generating device.
  • the separating element of the respective separating device can be acted upon at the same time with a negative pressure and an overpressure, preferably from the at least one compressed air generating device.
  • the seed hits the arable soil preferably at an angle greater than 0 °.
  • the seed line of the respective singling device has an output pitch angle ⁇ of less than 70 °, less than 60 °, less than 40 °, less than 30 ° or less than 20 ° and / or greater than 10 ° relative to a horizontal arable soil.
  • the agricultural distributor can, for. B. have at least one sensor for detecting a speed of the compressed air flow in or downstream of the seed line of the respective singling device and / or at least one sensor for detecting a speed of the seed in or downstream of the seed line of the respective singling device.
  • the at least one sensor can, for. B. be positioned inside the seed line or outside (z. B. substantially immediately downstream) of the seed line of the respective singling device.
  • the respective row unit carries a seed container for carrying seeds and preferably a coulter.
  • the seeds can e.g. B. Gravity-based from the Seed hopper are supplied.
  • the agricultural distributing machine can have a seed-on-demand system (e.g. nursing system).
  • the agricultural distributing machine prefferably has a compressed air generating structure with an inlet side and an outlet side.
  • the inlet side can e.g. B. suck in air from the atmosphere (z. B. environment) and / or are connected to the overpressure line system by means of a line system in order to be supplied with air from the overpressure line system.
  • the outlet side can apply a conveying air flow to a seed conveying system in order to convey seeds from a preferably central seed tank to the respective row unit by means of the conveying air flow.
  • This z. B. comprises embodiments in which the seed z. B. is conveyed into the respective separating device or in which the seed is fed into an intermediate container of the respective separating device in order to be able to be supplied from the intermediate container to the respective separating device.
  • the intermediate container can, for. B. be carried by the respective separating device and / or the respective row unit.
  • the compressed air generation structure and / or the seed tank can e.g. B. form part of a seed-on-demand system.
  • a differential pressure at the separating element of the respective separating device is greater than a differential pressure between an inlet (e.g. inlet area) and an outlet of the seed line of the respective separating device.
  • the respective row unit it is possible for the respective row unit to have a catching device (for example catching roller) for braking the seed dispensed (in particular shot out) from the seed line of the respective singling device.
  • the agricultural distributing machine can preferably be operated in a first operating mode and / or in a second operating mode.
  • isolated seeds are expediently outputted from the seed line of the respective isolation device with a speed component that is adapted or substantially matched to the speed of the agricultural distribution machine, in particular horizontal speed components, e.g. B. so that preferably a catching device for braking of the seed output from the seed line of the respective separating device is not required.
  • the respective row unit z. B. is provided without an interception device or with an interception device, but which is mounted in a position in which it is not in contact with the ground and / or is deactivated.
  • isolated seeds can be discharged (in particular shot out) to the arable soil at such a high exit speed that they have to be braked by means of a respective catching device.
  • the agricultural distributing machine may include a singulating system as disclosed herein.
  • an agricultural distributing machine that can be controlled in a section-dependent manner, in particular, can also comprise at least two separating systems as disclosed herein.
  • the agricultural distributing machine which is preferably section-dependently controllable, comprises at least two compressed air generating devices (e.g. one fan or several fans each), each with a suction side and a pressure side, e.g. B. a first compressed air generating device and a second compressed air generating device.
  • two compressed air generating devices e.g. one fan or several fans each
  • a suction side and a pressure side e.g. B.
  • a first compressed air generating device and a second compressed air generating device e.g. B.
  • Several separating devices can be assigned to a first section.
  • Compressed air generating device are connected, and the separating devices of the second section (preferably by means of, for example, as disclosed herein second ring line systems) are connected to the second compressed air generating device.
  • the suction side of the first compressed air generating device can be connected to a first air supply device (preferably comprising an adjusting element for changing the air supply) for an expedient direct or indirect supply of air from the atmosphere.
  • a first air supply device preferably comprising an adjusting element for changing the air supply
  • a second air supply device preferably comprising an adjusting element for changing the air supply
  • the separating devices of the first section and the separating devices of the second section can be operable (e.g. controllable) independently of one another.
  • the separating devices of the first section and the separating devices of the second section for. B. operated with different pressure differences.
  • the seed lines of the first section and the seed lines of the second section can be operated with compressed air flows having different speeds.
  • the separation devices of the first section can, for. B. be assigned to a first pivotable (in particular left) frame structure, wherein the separation devices of the second section can be assigned to a second pivotable (in particular right) frame structure.
  • the first section can e.g. B. comprise a first isolation system, which can expediently be designed as disclosed herein.
  • the second section can e.g. B. comprise a second isolation system, which can expediently be designed as disclosed herein.
  • It can e.g. B. a display device (z. B. a display etc.) can be made available to an operator pressure values of the respective separating device (z. B. a negative pressure in the negative pressure area, an overpressure in the overpressure area and / or a pressure difference at the separating element of the respective separating device ) and / or to display speed values of the compressed air flow and / or of the seed in the seed line of the respective singling device.
  • the agricultural distributing machine preferably comprises a plurality of row units and / or a plurality of separating devices with seed lines, so that the disclosure herein in relation to a respective row unit and / or a respective separating device also applies to a plurality of row units and / or a plurality of separating devices Can be found.
  • the separation organs divide the respective separation devices into negative and positive pressure areas and the negative pressure areas are connected to the suction side by means of a suction line system and the overpressure areas are connected to the pressure side by means of an overpressure line system to the separation elements of the respective separation devices at the same time to apply a negative pressure and an overpressure.
  • the separating element of the respective separating device can preferably have a plurality of holding holes for separating and preferably transporting the seeds to a seed delivery area for releasing separated seeds from the separating element.
  • the seed delivery area can preferably be arranged opposite a pressure differential interruption device (e.g. a (preferably chamber-shaped) sealing structure, a roller, a sealing element, etc.).
  • the pressure difference interruption device can, in particular, interrupt the pressure difference that holds the seed on the separating element, so that seed can be detached from the separating element and introduced into the seed line (preferably via the inlet area). It should also be mentioned that it is possible to supply both the separating devices and the seed-on-demand system with compressed air using a common compressed air generating device.
  • the agricultural distributing machine can preferably be provided with a compressed air flow that can be adjusted depending on the travel speed and / or the type of seed for transporting individual seeds to the arable land.
  • the suction line system can, for. B. expediently comprise one or more lines (z. B. pipes, hoses, etc.).
  • the overpressure line system z. B. expediently comprise one or more lines (z. B. pipes, hoses, etc.).
  • the at least one compressed air generating device z. B. comprises a fan, so that the fan can have the suction side and the pressure side.
  • the at least one compressed air generating device z. B. comprises two fans, so that one of the fans can have the suction side and one of the fans can have the pressure side.
  • the fan or fans can preferably comprise centrifugal or radial fans.
  • the driving speed of the agricultural distributor is essentially z. B. can correspond to the driving speed of a respective row unit and / or the driving speed of a tractor (z. B. tractor) for pulling the agricultural distributor.
  • the driving speed of the agricultural distributor can, for. B. include the driving speed of a respective row unit.
  • the at least one compressed air generating device can preferably be connected to the respective separating device, e.g. B. to apply positive pressure and / or negative pressure to the separating element of the respective separating device, preferably at the same time.
  • the speed of the compressed air flow in the seed line of the respective singling device is infinitely variable z. B. can be changed by means of the adjusting element, preferably during operation of the agricultural distributing machine. If z. B. the driving speed, the speed of the compressed air flow can also be increased. Slows down e.g. B. the driving speed, the speed of the compressed air flow can also be slowed down.
  • the speed of the compressed air flow in the seed line of the respective singling device depends on the threshold z. B. can be changed by means of the adjusting element, preferably during operation of the agricultural distributing machine. If the driving speed moves z. B. in a range of 10 km / h to 15 km / h, the speed of the compressed air flow can remain unchanged. If the driving speed increases z. B. over 15 km / h, the speed of the compressed air flow can be increased. If the driving speed slows down z. B. below 10 km / h, the speed of the compressed air flow can be slowed down.
  • the agricultural distributing machine can for the herein mentioned changing, controlling and / or adjusting z. B. a (preferably electronic) control device (z. B. processing unit, job calculator, computer, etc.).
  • the changing, controlling and / or setting can, for. B. also include an appropriate regulation (in particular in "closed control circuit").
  • the control device can, for. B. have control functions.
  • the invention also relates to an operating method for operating an agricultural distributing machine, preferably an agricultural distributing machine as disclosed herein.
  • the agricultural distributor can, for. B. be designed for precision sowing.
  • the agricultural distributing machine comprises at least one compressed air generating device with a suction side and a pressure side, and a plurality of row units, the respective row unit having a separating device with a rotatable separating element for separating seeds by means of a pressure difference (e.g. carries), wherein the respective separating device is connected to a seed line for transporting separated seeds to the arable land, e.g. B. by means of a compressed air flow and / or in free fall.
  • a pressure difference e.g. carries
  • the operating method is characterized in particular by the fact that the separating element divides the respective separating device into a negative pressure area and an overpressure area and the negative pressure area is connected to the suction side by means of a suction line system and the positive pressure area is connected to the pressure side by means of an overpressure line system, and that Separating member of the respective separating device is acted upon simultaneously with a negative pressure made available in particular by the suction line system and an overpressure made available in particular by the overpressure line system.
  • Figure 1 is a schematic view of the mode of operation of an embodiment of a part of an agricultural distribution machine according to an embodiment of the invention
  • Figure 2 shows a part of an agricultural distribution machine according to an embodiment of the invention
  • FIG. 3 shows an enlarged detailed view of FIG. 2
  • FIG. 4 shows another view of the agricultural distributing machine of FIGS. 2 and 3
  • FIG. 5 shows a perspective view of a separating device according to an embodiment of the invention
  • FIG. 6 shows a side view of the separating device of FIG. 5, FIG. 7 an enlarged detailed view of FIG. 6,
  • FIG. 8 shows a schematic sectional view of a separating device for an agricultural distributing machine according to another embodiment of the invention
  • FIG. 9 shows a perspective view of an agricultural distributing machine according to an embodiment of the invention.
  • FIG. 10 shows an enlarged detailed view of FIG. 9,
  • FIG. 11 shows an exemplary fan characteristic curve at a constant speed for an agricultural distributing machine according to an embodiment of the invention.
  • FIG. 1 shows a schematic view of the mode of operation of an embodiment of an agricultural distribution machine 500.
  • the agricultural distributing machine 500 comprises a large number of row units 200, with a large number of singling devices 10 and with a large number of seed lines 2, which is shown schematically in FIG. 1 by the italic reference symbols 200 + 10 + 2.
  • the agricultural distributing machine 500 is designed for single-grain sowing and comprises a compressed air generating device 100 (for example at least one fan, in particular a centrifugal or radial fan) with a suction side 101 and a pressure side 102.
  • the suction side 101 comprises in particular an inlet of the compressed air generation device 100, wherein the pressure side 102 in particular comprises an outlet of the compressed air generation device 100.
  • the agricultural distribution machine 500 comprises a plurality of row units 200 (e.g. FIGS. 9 and 10), e.g. B. at least 6, at least 8, at least 12, at least 14, at least 16, at least 18 or even at least 20 row units 200.
  • the row units 200 each carry a singling device 10 having a seed line 2.
  • the row units 200 can furthermore preferably each have a catching device 60 (in particular a catching roller, e.g. FIGS. 6 and 7) for braking the seed dispensed from the seed line 2 of the respective singling device 10 and e.g. B. a seed furrow closing device (z. B. pressure roller) for closing the seed furrow following the placement of the isolated seeds in the seed furrow.
  • a catching device 60 in particular a catching roller, e.g. FIGS. 6 and 7 for braking the seed dispensed from the seed line 2 of the respective singling device 10 and e.g. B. a seed furrow closing device (z. B. pressure roller) for closing the seed furrow following the placement of the isolated seeds in the seed furrow.
  • the catching devices 60 are used in particular to increase the seed placement quality and prevent z. B. excessive rolling or jumping of given seeds.
  • the respective separating device 10 comprises a separating housing 11 with a rotatable separating element 1 designed as a perforated disk for separating seeds by means of a pressure difference.
  • the respective separating device 10 is connected to a seed line 2 for transporting separated seeds to the arable land.
  • Individual seeds are transported in the seed line 2 by means of a compressed air flow X, so that the seed can be transported to the arable soil more quickly than in free fall and / or in relation to transport based purely on gravity.
  • embodiments such. B. with purely gravity-based transport and thus free fall possible.
  • the separating element 1 comprises a plurality of fold holes 1.1 for the pressure difference-based separation and transport of the seeds to a seed delivery area 42 for delivering isolated seeds into the seed line 2.
  • the seed delivery area 42 can preferably be opposite a pressure difference interruption device UE (e.g. a ( preferably chamber-shaped) sealing construction, a roller, a sealing element, etc.) can be arranged.
  • the pressure difference interruption device UE can in particular interrupt the pressure difference that holds the seed on the separating element 1, so that the seed can detach from the separating element 1 and be released directly or indirectly into the seed line 2.
  • the reference symbols 44 represent sealing elements (e.g. sealing lips, etc.).
  • a seed supply 41 is used to supply seeds to the separating device 10.
  • the seed supply 41 can, for. B.
  • seed container 40 carried and carried along by means of the row unit 200, preferably purely based on gravity (for example shown schematically in FIG. 6).
  • the seed supply 41 can, however, optionally be fed by a seed tank 50 of a seed-on-demand system (SOD system, also called “nursing system”) (e.g. FIG. 2).
  • SOD system seed-on-demand system
  • a partition 43 (e.g. a grid) provided with one or more holes separates the seed supply 41 from the separating element 1.
  • the partition 43 allows seeds and little or no air and in particular very small particles to pass.
  • a special feature is z. B. that a speed of the compressed air flow X in the seed line 2 of the respective singling device 10, in particular as a function of a driving speed V of the agricultural distributor 500 (e.g. FIGS. 6 and 7) and preferably depending on the type of seed (e.g. type of seed, shape , Size and / or weight of the seed (z. B. thousand grain weight), in particular the seed grains, etc.) can be changed, preferably preset or controlled by means of a control device.
  • a speed of the compressed air flow X in the seed line 2 of the respective singling device 10 in particular as a function of a driving speed V of the agricultural distributor 500 (e.g. FIGS. 6 and 7) and preferably depending on the type of seed (e.g. type of seed, shape , Size and / or weight of the seed (z. B. thousand grain weight), in particular the seed grains, etc.)
  • the type of seed e.g. type of seed, shape , Size and / or weight of the
  • a special feature is z. B. that the separating element 1 separates the separating device 10 into a negative pressure area 3 (e.g. negative pressure chamber) and an overpressure region 4 (e.g.
  • Overpressure chamber and the underpressure area 3 is connected to the suction side 101 by means of a suction line system 5 and the overpressure area 4 is connected to the pressure side 102 by means of an overpressure line system 6, so that the separating element 1 (e.g.
  • a negative pressure (p-) made available by the suction line system 5 and an overpressure (p +) made available by the overpressure line system 6 can be acted upon at the same time.
  • the separating device 10 can be operated as a hybrid, the separating element 1 being able to be acted upon actively with positive pressure on the one hand and actively with negative pressure on the other.
  • the compressed air flow X in particular its speed, can thereby, for. B. can be set essentially independently of the pressure difference applied to the separating element 1.
  • the compressed air flow X, in particular its speed, can thus, for. B. be set independently of the separation function of the separation device 10, in particular without affecting the pressure difference applied to the separation element 1 for separation.
  • the overpressure in the overpressure area 4 can even be reduced to essentially 0 mbar and, nevertheless, by means of the underpressure in the underpressure area 3, a sufficient differential pressure for separation can be maintained.
  • the hybrid concept can be used in different ways.
  • overpressure from the overpressure area 4 is used to contribute to the pressure difference, and furthermore to be used to generate the compressed air flow X in the seed line 2 of the respective singling device 10.
  • the hybrid concept can thus, for. B. can be applied to separating devices as disclosed in WO 2010059 101 A1.
  • the overpressure from the overpressure area 4 does not reach the seed line 2 of the respective singling device 10 and is therefore not used to generate the compressed air flow X in the seed line 2.
  • the compressed air flow X can be generated by a compressed air supply D2 that is independent of the overpressure in the overpressure chamber 4 (for example FIGS. 2 to 8).
  • the hybrid concept can thus, for. B. can be applied to isolation devices as disclosed in DE 20 2018 006 221 U1.
  • the respective separating device 10 is connected to the at least one compressed air generating device 100 via a ring line system comprising the suction line system 5 and the overpressure line system 6.
  • the at least one compressed air generating device 100 thus acts on a plurality of ring line systems, in particular connected in parallel, preferably simultaneously with overpressure and underpressure.
  • the suction side 101 and in particular the suction line system 5 is connected to an air supply device 20 for supplying air from the atmosphere A.
  • the air supply device 20 prefferably has an adjusting element 21 for changing the air supply, e.g. B. to increase or decrease an air volume flow.
  • the controllable adjusting valve can, for. B. be controlled during operation of the distributor 500 to change the air supply, in particular in order to be able to adapt a speed of the compressed air flow X to a driving speed V, if necessary.
  • the manually adjustable or exchangeable adjustment device can expediently fix the air supply to a setting that is predefined and therefore unchangeable for the operation of the agricultural distributing machine 500.
  • An amount of air sucked in via the air supply device 20 corresponds essentially to an amount of air exiting from the seed line 2 of the respective singling device 10 by means of the compressed air flow X.
  • An amount of air guided out of the respective separating device 10 by means of the suction line system 5 essentially corresponds to an amount of air guided into the respective separating device 10 by means of the overpressure line system 6. Since leaks L cannot be completely avoided, leakage-dependent deviations in particular are possible in the context of the invention.
  • z. B. represents a substantially closed ring system, with the exception of the air supply by means of the air supply device 20 and the air outlet from the seed lines 2 by means of the compressed air flows X, the air supply essentially compensating for the air outlet.
  • a speed of the compressed air flow X in the seed line 2 of the respective singling device 10 can be changed.
  • the pressure difference of the respective separating device 10 present at the separating element 1 and a speed of the compressed air generating device 100 can, however, remain essentially unchanged for this purpose.
  • a negative pressure level in the negative pressure area 3 and / or an overpressure level in the overpressure area 4 can mainly be changed, e.g. B. so that the negative pressure level in the negative pressure area 3 and the overpressure level in the overpressure area 4 are mutually equally variable (expediently constantly displaceable), whereby the pressure difference at the separating element 1 can remain essentially constant.
  • the overpressure can be changed in order to change the compressed air flow X, in particular its speed, without, however, the pressure difference at the separating element
  • the compressed air generating device 100 has a fan which comprises the suction side 101 and the pressure side 102.
  • a fan which comprises the suction side 101 and the pressure side 102.
  • two fans are made available, one fan including the suction side 101 and the other fan including the pressure side 102, whereby the available positive and negative pressures in negative pressure area 3 and positive pressure area 4 are flexible and / or independent can be adjusted from each other.
  • the compressed air generating device 100 and thus in particular a pressure difference at the separating element 1 as well as the adjusting element 21 and thus in particular a speed of the compressed air flow X can be changed as a function of at least one control parameter.
  • An important control parameter is e.g. B. a driving speed V of the agricultural distributor 500. So it is z. B. possible to set a speed of the compressed air generating device 100 and / or the adjusting element 21 depending on the driving speed.
  • a horizontal (exit) speed component Vh of the seed output from the seed line 2 can be adapted to the driving speed V (e.g. increased or slowed), e.g. B. to enable a relative speed between the horizontal (exit) speed component Vh and the driving speed V of less than 25km / h, less than 20 km / h, less than 15km / h or less than 10km / h.
  • Even an adjustment can advantageously be made possible (e.g. relative speed approximately 0 km / h; V essentially equal to Vh).
  • the agricultural distributing machine 500 can be operable in a first operating mode and preferably a second operating mode.
  • isolated seeds can be transported in particular into a seed furrow in the arable soil.
  • the exit speed of the separated seeds in the first operating mode is adapted to the driving speed V of the agricultural distributor 500 that braking by means of a respective catching device 60 is not necessary and the respective catching device 60 is present in the first operating mode, but can be deactivated, e.g. B. in a position in which it is not in contact with the ground. It is also z.
  • isolated seeds can also be transported into a seed furrow in the field.
  • the exit speed of the separated seeds is so high in the second operating mode that the seed dispensed is braked by means of a respective catching device 60 which is preferably in contact with the ground.
  • the seed furrow can be closed by a respective seed furrow closing device (e.g. a pressure roller).
  • a respective seed furrow closing device e.g. a pressure roller
  • a control parameter can thus e.g. B. include different travel speeds of a row unit 200 on the inside of the curve and a row unit 200 on the outside of the curve while the agricultural distributor 500 is cornering. It is possible here for an average speed of the compressed air flow X to be determined, which is necessary for a satisfactory distribution of both the row units 200 on the outside of the curve and the row units on the inside Row units 200 provides. However, it is also possible that the
  • Compressed air generating device 100 z. B. can comprise several fans and / or several adjusting elements 21 are provided in order to be able to provide a not only satisfactory but also an optimal speed of the compressed air flow X for the row units 200 on the outside of the curve and for row units 200 on the inside of the curve.
  • the agricultural distribution machine 500 can, for. B. have at least two detection devices (z. B. sensors) for detecting a driving speed of a row unit 200 on the inside of the curve and a row unit 200 on the outside of the curve in order to detect their different driving speeds when cornering.
  • detection devices z. B. sensors
  • the control parameter can alternatively or additionally include: a seed variety (e.g. species,
  • Shape, weight e.g. thousand grain weight
  • a sowing depth of the seed especially in a seed furrow
  • soil conditions e.g. creditworthiness, moisture
  • a catching device 60 e.g. FIGS. 6 and 7
  • a catching device 60 e.g. FIGS. 6 and 7
  • An input device can be made available by means of which an operator can input one or more control parameters manually.
  • a detection system for the automatic detection of one or more control parameters e.g. changing driving speed, moisture meter, etc.
  • control parameters e.g. changing driving speed, moisture meter, etc.
  • FIG. 2 shows part of an agricultural distributing machine 500
  • FIG. 3 shows an enlarged detailed view of FIG. 2
  • FIG. 4 shows another view of the agricultural distributing machine 500
  • FIG. 5 shows a perspective view in particular of a separating device 10
  • FIG. 6 shows a side view in particular of the separating device from FIG. 5
  • FIG. 7 shows an enlarged detailed view of FIG.
  • FIG. 8 shows a schematic sectional view of a separating device 10, which, however, is somewhat modified compared to the separating device 10 shown in FIG.
  • the agricultural distributing machine 500 is described below with common reference to FIGS. 2 to 8.
  • the overpressure line system 6 forms a first compressed air supply Dl into the overpressure area 4 in order to contribute to the pressure difference at the separating element 1 of the respective separating device 10. However, essentially no overpressure reaches the seed line 2 of the respective singling device 10 from the overpressure area 4. Rather, the compressed air flow X can be generated by a compressed air supply D2 which is independent of the overpressure in the overpressure area 4, in particular a separate one.
  • the seed line 2 comprises an inlet area KE for the inlet of isolated seeds, the inlet area KE being formed in a jacket surface of the seed line 2, specifically in a radially outer partial area of a curved section of the seed line 2.
  • the second compressed air supply D2 is made available in order to generate the compressed air flow X in the seed line 2 of the respective singling device 10.
  • the overpressure line system 6 preferably forms not only the first compressed air supply D1, but also the second compressed air supply D2.
  • the overpressure line system 6 is divided in a division area 6.1 into the first compressed air supply Dl and the second compressed air supply D2, so that the first compressed air supply Dl and the second compressed air supply D2 together with the overpressure line system 6 and in particular the compressed air generating device 100 Compressed air can be supplied.
  • a flow barrier and / or a Coanda effect is set up along the inlet area KE of the seed line 2 of the respective singling device 10 and / or compressed air from the first compressed air supply D1 in the overpressure area 4 and compressed air from the second compressed air supply D2 in the seed line 2 (Compressed air flow X) act on one another, so that compressed air from the first compressed air supply D1 and thus compressed air in the overpressure area 4 is essentially prevented from penetrating into the seed line 2 via the inlet area KE.
  • the compressed air required for the compressed air flow X is thus made available essentially exclusively by the second compressed air supply D2.
  • FIG. 7 shows a detailed view of an outlet region of a seed line 2 and a field soil (in particular a seed furrow) in which the separated seeds are distributed.
  • the seed line 2 preferably has an output setting angle a of less than 30 ° relative to a horizontal arable soil, so that, for. B. issued seeds can be deposited at a preferably acute angle and relatively flat on the soil (z. B. seed furrow).
  • the seed discharged from the seed line 2 (e.g. shooting out or exiting) has a horizontal exit velocity component Vh and a vertical exit velocity component Vv, which form an exit total velocity component Vg.
  • the reference symbol V denotes a driving speed, e.g. B. the respective row unit 200 and / or the agricultural distribution machine 500.
  • the driving speed V can, for. B. be about 15 km / h, z. B. +/- 5 km / h.
  • the speed of the compressed air flow X in the seed line 2 can in particular be set so that the horizontal exit speed component Vh of the seeds emerging from the seed line 2 can be adapted to the driving speed V, e.g. B. a relative speed between the travel speed V and the horizontal exit speed component Vh can be generated, in which there is no need for a safety catch 60 for braking the seed output from the seed line 2, e.g. B. a relative speed of less than 25 km / h, less than 20 km / h, less than 10 km / h or even about 0 km / h.
  • the speed of the compressed air flow in the seed line of the respective singling device is infinitely variable z.
  • B. is controllable by means of the adjusting element 21, preferably during the operation of the agricultural distributor 500.
  • B. the driving speed V the speed of the compressed air flow X can also be increased.
  • Slows down e.g. B. the driving speed V, the speed of the compressed air flow can also be slowed down.
  • the speed of the compressed air flow X in the seed line 2 of the respective singling device 10 can in particular be changed in a threshold-dependent or stepless manner by means of the adjusting element 21, preferably when the agricultural distributing machine 500 is operated by means of a control device. If the driving speed V z. B. in a predefined range, approximately between 10 km / h and 15 km / h, the speed of the compressed air flow X z. B. remain essentially unchanged. However, if the driving speed V increases z. B. over 15 km / h, the speed of the compressed air flow X can be increased. If the driving speed V z slows down. B. below 10 km / h, the speed of the compressed air flow X can be slowed down.
  • the speed of the compressed air flow X can also be implemented by a corresponding control of the adjusting element 21 by means of a control device.
  • the speed of the compressed air flow X can also be set to an unchangeable value predefined for the operation of the agricultural distributing machine 500, preferably likewise by means of the adjusting element 21.
  • One or more sensors 30 can be provided for detecting a speed of the compressed air flow X in or downstream of the seed line 2 and / or for detecting a speed of the seed in or downstream of the seed line 2.
  • the sensors 30 are expediently positioned at the end of the seed line.
  • FIG. 6 shows, very schematically, a seed container 40 carried by means of a row unit 200, which is used to carry seeds and has a seed feed 41 in order to be able to feed the seed to the respective singling device 10.
  • FIGS. 2 to 8 relate in particular to an agricultural distribution machine 500 with an advantageous seed-on-demand system (nursing system).
  • the seed-on-demand system may include a compressed air generating structure 300 having an inlet side 301 and an outlet side 302.
  • the inlet side 301 can suck in air from the atmosphere and / or be connected to the overpressure line system 6 by means of a line system 52 in order to be supplied with air from the overpressure line system 6.
  • the outlet side 302 acts on a conveying system 51 with a conveying air flow in order to convey seeds from a central seed tank 50 to the row units 200 by means of the conveying air flow.
  • the seed can expediently be conveyed directly into the separating devices 10 or expediently indirectly via intermediate containers. It is preferred that the The conveying air flow does not get into the separating devices 10 or only to a negligible extent. For this purpose, the conveying air flow upstream of the separating devices 10, for. B. escape via vents.
  • FIG. 9 shows an agricultural distributing machine 500, FIG. 10 showing an enlarged detailed view of FIG.
  • FIG. 2 ff Shows only two examples
  • Isolation devices 10 preferred agricultural distributing machines 500 z. B. at least 6, at least 8, at least 12, at least 14, at least 16, at least 18 or even at least 20 isolation devices 10, all of which, as shown in Figure 2 ff, can be acted upon by a common compressed air generating device 100 with overpressure and underpressure.
  • an agricultural distributing machine 500 may include several separating systems as shown in FIG. 2 ff.
  • a first isolation system can, for. B. comprise at least 2, at least 3, at least 4 or at least 6 separating devices 10, which are acted upon by a first compressed air generating device 100 with overpressure and underpressure.
  • a second isolation system can, for. B. at least 2, at least 3, at least 4 or at least 6 separating devices 10, which are acted upon by a second compressed air generating device 100 with overpressure and negative pressure.
  • the section-dependent controllable agricultural distributing machine 500 can have at least two separating systems, each of which can be designed as disclosed herein and / or can be operated independently of one another.
  • Compressed air generating device 100 each having a suction side 101 and a pressure side 102 are provided.
  • Several separating devices 10 are assigned to a first section S1.
  • the isolation devices 10 of the first section S1 are preferably connected to the first compressed air generation device 100 by means of first ring line systems and the isolation devices 10 of the second section S2 are preferably connected to the second compressed air generation device 100 by means of second ring line systems.
  • suction side 101 of the first compressed air generating device 100 is connected to a first air supply device 20, preferably comprising an adjusting element 21 for changing the air supply, for supplying air from the atmosphere A, and the suction side 101 of the second compressed air generating device 100 with a second, preferably an adjusting element 21 for changing the air supply comprising air supply device 20 for supplying air from the atmosphere A is in connection.
  • the separating devices 10 of the first section S1 and the separating devices 10 of the second section S2 can be operated independently of one another, e.g. B. can be operated with different pressure differences. Also z. B. the seed lines 2 of the first section S1 and the seed lines 2 of the second section S2 are operated with compressed air flows X having different speeds.
  • the separating devices 10 of the first section S1 are assigned to a first preferably pivotable frame structure F1 and the separating devices 10 of the second section S2 are assigned to a second preferably pivotable frame structure F2.
  • Reference number 400 denotes a tractor (e.g. tractor) for pulling the agricultural distributing machine 500.
  • FIG. 11 shows an exemplary characteristic curve (in particular pressure difference) of a compressed air generating device 100 (e.g. fan, in particular radial or centrifugal fan) at a constant speed for an agricultural distributing machine 500 according to an embodiment of the invention.
  • FIG. 11 shows e.g. B .:
  • the pressure difference at the separating element 1 of the respective separating device 10 can be kept essentially constant and the speed of the compressed air flows X (in particular shot speed) can be regulated, preferably without having to change the fan speed. It should also be mentioned that a differential pressure at the separating element 1 of the respective separating device 10 is expediently greater than a differential pressure between an inlet and an outlet of the seed line 10 of the respective separating device 10.
  • feed device preferably air feed device
  • sealing element e.g. B. sealing lips
  • 50 seed tank preferably central seed tank and / or SOD seed tank
  • pipe system preferably SOD pipe system
  • Vv vertical speed component in particular vertical seed outlet speed component Vg total speed component, in particular seed total outlet

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  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Sowing (AREA)

Abstract

L'invention concerne une machine de distribution agricole (500), de préférence pour un ensemencement séparé, laquelle machine comprend : au moins un dispositif de génération d'air comprimé (100), qui a un côté aspiration (101) et un côté pression (102) ; et une pluralité de rayonneurs (200). Chaque rayonneur (200) comprend un dispositif de séparation (10) ayant un élément de séparation rotatif (1) pour séparer des semences à l'aide d'une différence de pression. Chaque dispositif de séparation (10) est relié à une ligne de semence (2) pour transporter des semences séparées jusqu'au sol à l'aide d'un écoulement d'air comprimé (X) et/ou en chute libre. La machine de distribution agricole (500) est en particulier caractérisée en ce que l'élément de séparation (1) divise le dispositif de séparation (10) en question en une région à pression négative (3) et une région à pression positive (4), et en ce que la région à pression négative (3) est reliée au côté aspiration (101) à l'aide d'un système de lignes d'aspiration (5) et en ce que la région à pression positive (4) est reliée au côté pression (102) à l'aide d'un système de lignes à pression positive (6), afin d'appliquer simultanément une pression négative et une pression positive à l'élément de séparation (1) du dispositif de séparation (10) en question. L'invention concerne également un procédé de fonctionnement associé.
PCT/EP2020/078307 2019-10-11 2020-10-08 Machine de distribution agricole ayant des dispositifs de séparation pouvant fonctionner de façon hybride et simultanée WO2021069607A1 (fr)

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DE202018006221U1 (de) 2018-07-10 2019-08-21 Horsch Maschinen Gmbh Vereinzelungsvorrichtung zur Druckdifferenz-basierten Vereinzelung von Körnern und landwirtschaftliche Reiheneinheit

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SE2150888A1 (sv) * 2021-07-06 2023-01-07 Vaederstad Holding Ab Lantbruksredskap och förfaranden för matning av granulärt material
WO2023062463A1 (fr) 2021-10-11 2023-04-20 Precision Planting Llc Accélérateur de graines
GB202114710D0 (en) 2021-10-14 2021-12-01 Prec Planting Llc Seed accelerator
WO2024105475A1 (fr) 2022-11-15 2024-05-23 Precision Planting Llc Unité de rangs

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