WO2022258422A1 - Hydraulikschaltung zur schardruckeinstellung an einer landwirtschaftlichen ausbringmaschine - Google Patents
Hydraulikschaltung zur schardruckeinstellung an einer landwirtschaftlichen ausbringmaschine Download PDFInfo
- Publication number
- WO2022258422A1 WO2022258422A1 PCT/EP2022/064665 EP2022064665W WO2022258422A1 WO 2022258422 A1 WO2022258422 A1 WO 2022258422A1 EP 2022064665 W EP2022064665 W EP 2022064665W WO 2022258422 A1 WO2022258422 A1 WO 2022258422A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- coulter
- hydraulic
- hydraulic circuit
- line area
- Prior art date
Links
- 238000009331 sowing Methods 0.000 title abstract description 6
- 230000001419 dependent effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 description 10
- 238000012986 modification Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 239000002689 soil Substances 0.000 description 7
- 238000005056 compaction Methods 0.000 description 6
- 239000003337 fertilizer Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 206010007134 Candida infections Diseases 0.000 description 1
- 208000007027 Oral Candidiasis Diseases 0.000 description 1
- 241000287411 Turdidae Species 0.000 description 1
- 201000003984 candidiasis Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- A01C7/201—Mounting of the seeding tools
- A01C7/205—Mounting of the seeding tools comprising pressure regulation means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0433—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with vibration preventing means
Definitions
- Hydraulic circuit for setting the coulter pressure on an agricultural spreading machine
- the invention relates to a hydraulic circuit for setting the coulter pressure on an agricultural spreading machine according to the preamble of patent claim 1, a hydraulic control block according to the preamble of patent claim 9, an agricultural spreading machine according to the preamble of patent claim 10 and a method for adjusting the coulter pressure on an agricultural spreading machine the preamble of patent claim 11.
- each share or a group of shares is usually assigned a share pressure adjustment cylinder, with which the share pressure on the share or on the group of shares can be changed or adjusted.
- Pressure relief valve limits the hydraulic pressure in the second line area, is dependent on the hydraulic pressure in the first line area.
- Soil compaction in the area of the lane can be compensated by the coulter pressure difference.
- the hydraulic circuit achieves this with a simple design and a small number of inexpensive standard components.
- the agricultural application machine for example, seed and/or fertilizer can be applied.
- the agricultural spreading machine can therefore be a seed drill or a fertilizer spreading machine, for example.
- the agricultural spreading machine can be set up for the combined spreading of seed and fertilizer.
- the shares can therefore be coulters or fertilizer coulters.
- the second line area is in contact with the valve inlet of the second pressure-limiting valve. Furthermore, the first line area is in contact with the valve outlet of the second pressure-limiting valve. The second The line area and the first line area of the hydraulic circuit are thus separated from one another by the second pressure-limiting valve.
- the second pressure-limiting valve is set up to open when an opening pressure present at the valve inlet is exceeded, with the opening pressure preferably being dependent on a spring closing force which is exerted by a spring of the second pressure-limiting valve.
- the opening pressure is preferably also dependent on an additional closing force which is exerted by the hydraulic pressure in the first line region. Because the opening pressure is dependent on the spring closing force and the additional closing force, the second maximum pressure to which the second pressure relief valve limits the hydraulic pressure in the second line area depends on the one hand on the spring properties of the valve spring of the second pressure relief valve and on the other hand on the hydraulic pressure in the first line area dependent.
- the difference between the second maximum pressure to which the second pressure limiting valve limits the hydraulic pressure in the second line area and the hydraulic pressure in the first line area can be determined via the spring properties of the valve spring of the second pressure-limiting valve.
- a hydraulic circuit according to the invention is advantageous in which the second pressure-limiting valve is designed in such a way that the spring closing force and the additional closing force add up to form a total closing force and thus lead to an increased opening pressure.
- the second pressure relief valve consequently works according to the principle of closing force addition, a spring closing force predetermined by the spring properties of the valve spring and an additional closing force predetermined by the hydraulic pressure in the first line region being taken into account in the closing force addition.
- the hydraulic pressure in the second line area is increased compared to the hydraulic pressure in the first line area by a pressure difference that goes back to the spring closing force.
- the hydraulic pressure in the second line area is increased by a fixed amount. This amount can be set at the factory and/or by that
- a hydraulic circuit according to the invention is also advantageous in which the first pressure-limiting valve and the second pressure-limiting valve are connected in series.
- the first line area is preferably delimited by the first pressure-limiting valve, the second pressure-limiting valve and the at least one first coulter pressure cylinder.
- the converted differential pressure circuit is thus implemented by two pressure relief valves in series.
- the second pressure-limiting valve can be adjusted mechanically and/or manually.
- the fluid pressure required to overcome the spring closing force is preferably adjustable.
- the spring properties of the valve spring and thus the spring closing force influencing the opening pressure can be adjusted by the mechanical and/or manual adjustment.
- the preload of the valve spring can be changed, for example. In order to increase the spring closing force and thus to increase the required opening pressure, the pretensioning of the spring can be increased mechanically and/or manually. To reduce the spring closing force and thus the required opening pressure, the preload of the valve spring can be reduced.
- the hydraulic circuit according to the invention has an actuating device which is connected to the second pressure-limiting valve and by means of which the second pressure-limiting valve can be adjusted.
- the bias of the valve spring of the second pressure-limiting valve can be set via the actuating device.
- the actuating device can be a hand wheel or an adjusting slide, for example.
- the actuating device can have a scale which can be read by a machine operator and which shows the differential pressures to be realized by the second pressure-limiting valve between the second maximum pressure, to which the second pressure-limiting valve limits the hydraulic pressure in the second line area, and the hydraulic pressure in the first line area.
- the first pressure-limiting valve can be adjusted electrically.
- the first pressure-limiting valve can be adjusted electrically, it can be connected to a control device for setting the coulter pressure.
- the coulter pressure generated by the first coulter pressure cylinder can be set via the control device. This also affects the coulter pressure generated by the second coulter pressure adjustment cylinder.
- the first pressure-limiting valve can be a proportional pressure-limiting valve, for example, in which opening pressures can be set proportionally to the magnetic current.
- the housing of the hydraulic control block, in which the hydraulic circuit is integrated can be made of plastic or metal, for example.
- the housing is a plastic injection-moulded housing or an aluminum injection-moulded housing.
- the hydraulic control block according to the invention preferably has a first cylinder connection and a second cylinder connection.
- a first coulter pressure adjustment cylinder can be connected to the first line area via the first cylinder connection.
- a second coulter pressure adjustment cylinder can be connected to the second line area via the second cylinder connection.
- the hydraulic control block preferably has an inlet connection and a return connection. Hydraulic fluid can be introduced into the hydraulic circuit from a tractor-side hydraulic source via the inlet connection. Hydraulic fluid can flow from the hydraulic circuit to a tractor-side via the return connection
- Hydraulic tank can be supplied.
- the object on which the invention is based is also achieved by an agricultural spreading machine of the type mentioned at the outset, the hydraulic circuit of the spreading machine according to the invention being designed according to one of the embodiments described above or being part of a hydraulic control block described above.
- the advantages and modifications of the spreading machine according to the invention reference is made to the advantages and modifications of the hydraulic circuit according to the invention and the hydraulic control block.
- the spreading machine can, for example, be an attachment that can be attached to an agricultural vehicle, in particular a tractor.
- the agricultural spreading machine can be configured to be carried or towed by the agricultural vehicle.
- the agricultural spreading machine can be a seed drill, for example.
- the object on which the invention is based is also achieved by a method of the type mentioned at the outset, the second maximum pressure to which the second pressure-limiting valve limits the hydraulic pressure in the second line region being dependent on the hydraulic pressure in the first
- the method according to the invention is preferably used to adjust the coulter pressure on an agricultural spreading machine according to one of the embodiments described above.
- the setting of the coulter pressure is preferably implemented by means of a hydraulic circuit according to one of the embodiments described above.
- the hydraulic control block 50 includes an integrated into a housing 52 hydraulic circuit 10, which for
- Coulter pressure setting on the agricultural spreading machine is used.
- the hydraulic control block 50 has an inlet connection 54 which is connected via an inlet line 100 to a hydraulic source 202 of a hydraulic unit 200 on the tractor. Hydraulic fluid, for example hydraulic oil, can be introduced into the hydraulic circuit 10 from the hydraulic source 202 on the tractor side via the inlet connection 54 .
- the hydraulic control block 50 also includes a first cylinder port 56 and a second cylinder port 58.
- the first cylinder port 56 is connected via a connecting line 102 to a first coulter pressure adjustment cylinder 104.
- the second cylinder connection 58 is connected to a second coulter pressure adjustment cylinder 108 via a connection line 106 .
- a different hydraulic pressure is provided to the coulter pressure setting cylinders 104, 108 via the connecting lines 102, 106, so that the coulter pressure setting cylinders 104, 108 generate different coulter pressures on the respective sowing coulters. Since the sowing coulter connected to the coulter pressure adjustment cylinder 108 runs in the path of the tractor, a higher coulter pressure is required on this sowing coulter due to the soil compaction caused by the tractor, so that a uniform placement depth is implemented over the entire width of the machine. The sowing coulter connected to the coulter pressure adjustment cylinder 104 runs outside the tractor's lane and requires a lower coulter pressure due to less soil compaction.
- the hydraulic control block 50 also has a return port 60 . Hydraulic fluid can be discharged from the hydraulic circuit 10 via the return connection 60 and the return line 110 and fed to a hydraulic tank 204 of the hydraulic unit 200 on the tractor.
- the return line 110 is also connected to the outlets of the coulter pressure adjustment cylinders 104, 108 connected, so that the hydraulic fluid discharged from the coulter pressure adjustment cylinders 104, 108 is fed back to the hydraulic tank 204 of the hydraulic unit 200.
- the housing 52 of the hydraulic control block 50 can be made of plastic and/or metal, for example.
- Housing 52 may be, for example, an injection molded plastic or aluminum housing.
- the hydraulic circuit 10 integrated into the housing 52 has an inflow line 12 connected to the inflow connection 54 . Via the inflow line 12 and the throttle 14, the hydraulic fluid reaches a line area 16, which is connected to the coulter pressure setting cylinder 108 and the coulter pressure setting cylinder 108 specifies a hydraulic pressure.
- the line area 16 is the “second line area” within the meaning of the patent claims.
- the line area 16 is followed by a pressure relief valve 18, via which the hydraulic pressure in the line area 16 is limited to a maximum pressure.
- the pressure relief valve 18 is the “second pressure relief valve” within the meaning of the patent claims.
- the line area 16 is therefore located at the valve inlet 24 of the
- Pressure relief valve 18 on. At the valve outlet 26 of the pressure relief valve 18 there is a line area 20 which is connected to the coulter pressure adjustment cylinder 104 and the coulter pressure cylinder 104 specifies a hydraulic pressure.
- the hydraulic pressure in the line area 20 is limited to a maximum pressure via a pressure-limiting valve 22 .
- the line area 20 is the “first line area” within the meaning of the patent claims.
- the pressure relief valve 22 is the “first pressure relief valve” within the meaning of the patent claims.
- the maximum pressure to which the pressure-limiting valve 18 limits the hydraulic pressure in the line area 16 depends on the hydraulic pressure in the line area 20 .
- the pressure-limiting valve 18 opens when an opening pressure present at the valve inlet 24 is exceeded, the opening pressure being dependent on a spring closing force and an additional closing force.
- the spring closing force is provided by a valve spring of the Pressure relief valve 18 exercised.
- the additional closing force is exerted by the hydraulic pressure in the line area 20 .
- the pressure-limiting valve 18 is designed in such a way that the spring closing force and the additional closing force add up to form a total closing force and thus lead to an increased opening pressure.
- the hydraulic pressure in the line area 16 is therefore increased by a fixed amount, which is dependent on the spring closing force of the valve spring of the pressure-limiting valve 18 .
- the spring closing force is preset at the factory and can be changed later by the machine operator.
- the pressure relief valve 18 can be adjusted manually.
- the pressure-limiting valve 18 is connected to an actuating device, by means of which the pressure-limiting valve can be adjusted.
- the actuating device can be a hand wheel or an adjusting slide, for example.
- the pressure relief valve 22 is an electrically adjustable valve.
- the pressure-limiting valve 22 is designed as a proportional pressure-limiting valve, in which the opening pressures can be adjusted proportionally to the magnetic current.
- the hydraulic circuit 10 also includes an outflow line 28 which is connected to the return port 60 . The hydraulic fluid passing through the pressure-limiting valve 22 can be discharged from the hydraulic control block 50 via the outflow line 28 .
- the hydraulic circuit 10 includes two manometers 30a, 30b, via which the fluid pressures in the line areas 16, 20 can be monitored.
- the manometer 30b is replaced by a pressure sensor, with the signals from this pressure sensor being used to regulate the hydraulic pressure in the line area 20, ie the “first line area”.
- the signals from the pressure sensor are used to control the pressure-limiting valve 22, ie the “first pressure-limiting valve”, based on a comparison between an actual hydraulic pressure measured by the pressure sensor and a setpoint hydraulic pressure that can be specified by a user.
- connection line 102 connection line 104 coulter pressure adjustment cylinder 106 connection line
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental Sciences (AREA)
- Mechanical Engineering (AREA)
- Soil Working Implements (AREA)
- Sowing (AREA)
- Fluid-Pressure Circuits (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112023024823A BR112023024823A2 (pt) | 2021-06-10 | 2022-05-31 | Circuito hidráulico, bloco de controle hidráulico, máquina espalhadora agrícola e método para ajustar a pressão de filtro em uma máquina espalhadora agrícola |
CA3220376A CA3220376A1 (en) | 2021-06-10 | 2022-05-31 | Hydraulic circuit for coulter pressure adjustment in an agricultural sowing machine |
US18/568,671 US20240206374A1 (en) | 2021-06-10 | 2022-05-31 | Hydraulic circuit for colter pressure adjustment at an agricultural spreading machine |
EP22731180.0A EP4351307A1 (de) | 2021-06-10 | 2022-05-31 | Hydraulikschaltung zur schardruckeinstellung an einer landwirtschaftlichen ausbringmaschine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021114944.4A DE102021114944A1 (de) | 2021-06-10 | 2021-06-10 | Hydraulikschaltung zur Schardruckeinstellung an einer landwirtschaftlichen Ausbringmaschine |
DE102021114944.4 | 2021-06-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022258422A1 true WO2022258422A1 (de) | 2022-12-15 |
Family
ID=82100258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/064665 WO2022258422A1 (de) | 2021-06-10 | 2022-05-31 | Hydraulikschaltung zur schardruckeinstellung an einer landwirtschaftlichen ausbringmaschine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20240206374A1 (de) |
EP (1) | EP4351307A1 (de) |
BR (1) | BR112023024823A2 (de) |
CA (1) | CA3220376A1 (de) |
DE (1) | DE102021114944A1 (de) |
WO (1) | WO2022258422A1 (de) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5065681A (en) | 1990-10-10 | 1991-11-19 | Deere & Company | Hydraulic down pressure structure for an implement with multiple ground engaging tools |
EP2982230A1 (de) * | 2014-08-05 | 2016-02-10 | Amazonen-Werke H. Dreyer GmbH & Co. KG | Sämaschine |
WO2019046851A1 (en) * | 2017-09-01 | 2019-03-07 | Ag Leader Technology | IMPROVED LOWER PRESSURE AND LIFTING DEVICES OF PLANTER, SYSTEMS AND ASSOCIATED METHODS |
EP3106012B1 (de) | 2011-08-05 | 2019-12-11 | Precision Planting LLC | Pflanzmaschine mit eine vielzahl an reiheneinheiten, systeme und verfahren zur abtriebssteuerung von reiheneinheiten |
-
2021
- 2021-06-10 DE DE102021114944.4A patent/DE102021114944A1/de active Pending
-
2022
- 2022-05-31 WO PCT/EP2022/064665 patent/WO2022258422A1/de active Application Filing
- 2022-05-31 US US18/568,671 patent/US20240206374A1/en active Pending
- 2022-05-31 EP EP22731180.0A patent/EP4351307A1/de active Pending
- 2022-05-31 CA CA3220376A patent/CA3220376A1/en active Pending
- 2022-05-31 BR BR112023024823A patent/BR112023024823A2/pt unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5065681A (en) | 1990-10-10 | 1991-11-19 | Deere & Company | Hydraulic down pressure structure for an implement with multiple ground engaging tools |
EP3106012B1 (de) | 2011-08-05 | 2019-12-11 | Precision Planting LLC | Pflanzmaschine mit eine vielzahl an reiheneinheiten, systeme und verfahren zur abtriebssteuerung von reiheneinheiten |
EP2982230A1 (de) * | 2014-08-05 | 2016-02-10 | Amazonen-Werke H. Dreyer GmbH & Co. KG | Sämaschine |
WO2019046851A1 (en) * | 2017-09-01 | 2019-03-07 | Ag Leader Technology | IMPROVED LOWER PRESSURE AND LIFTING DEVICES OF PLANTER, SYSTEMS AND ASSOCIATED METHODS |
Also Published As
Publication number | Publication date |
---|---|
EP4351307A1 (de) | 2024-04-17 |
DE102021114944A1 (de) | 2022-12-15 |
BR112023024823A2 (pt) | 2024-02-20 |
US20240206374A1 (en) | 2024-06-27 |
CA3220376A1 (en) | 2022-12-15 |
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