Agricultural working machine, hydraulic system for an agricultural working machine and method for operating an agricultural working machine

Abstract

An agricultural machine, comprising at least one blower (40) for pneumatically acting on one or more delivery lines and / or for delivering material to be distributed, and a hydraulic system (1) for hydraulically actuating and / or operating one or more consumers (21A-21D), the hydraulic system (1) having at least one hydraulic displacement unit (30) provided for driving the blower (40). In order to design an agricultural working machine in such a way that the hydraulic system (1), on the one hand, is further simplified and, on the other hand, is even more efficient, it is provided that the displacement unit (30) is designed in the manner of a variable displacement drive, preferably a variable displacement motor or a variable displacement pump, having an adjustable displacement volume, which is mechanically and force-transmittingly coupled to the blower (40). A hydraulic system for the agricultural working machine and a method for operating an agricultural working machine are also proposed.

Description

[0001] Agricultural working machine, hydraulic system for an agricultural working machine and method for operating an agricultural working machine

[0002] The invention relates to an agricultural working machine according to the preamble of patent claim 1, a hydraulic system for an agricultural working machine according to the preamble of patent claim 10 and a method for operating an agricultural working machine according to the preamble of patent claim 11.

[0003] Agricultural machinery comes in various designs and is used for a wide variety of agricultural purposes. These include, for example, distribution machines for spreading material on agricultural land, such as seed drills for sowing seeds, spreaders for distributing fertilizer, or sprayers for applying pesticides.

[0004] Often, such machines are equipped with at least one blower for pneumatically pressurizing conveying lines and / or conveying the material to be distributed. Such blowers are typically driven by a hydraulic system associated with the machine, which also serves to hydraulically actuate and / or operate one or more consumers, particularly work units, of the machine.

[0005] Such agricultural machines with at least one blower and a generic hydraulic system are used in agricultural practice in various designs and have generally proven themselves. For example, EP 4 170 189 2 describes an agricultural machine designed as a seed drill with a hydraulic system that has a displacement unit for driving the blower. The displacement unit is designed like an adjusting drive and can be adjusted to different hydraulic loads as required. In many cases or application situations, however, the blower and consumers have to be operated with different loads, which is not easily possible with a displacement unit as previously arranged. Different loads between the blower and consumers, in particular working units, can only be accommodated here by, among other things, exchanging the blower orthe hydraulic blower drive or additional hydraulic devices such as throttles, flow control valves or the like, which, however, are detrimental to the efficiency of the hydraulic system.

[0006] The object underlying the invention is therefore to design an agricultural work machine in such a way that the hydraulic system is both further simplified and even more efficient. In particular, the object is to create a hydraulic system that is particularly easy to adapt to different operating conditions and / or configurations of agricultural work machines.

[0007] This object is achieved according to the invention in that the displacement unit is designed in the manner of an adjustment drive, preferably an adjustment motor or an adjustment pump, with an adjustable displacement volume, which is coupled to the blower in a mechanical and force-transmitting manner.

[0008] As a result of this measure, the displacement unit designed as an adjustment drive is coupled to the at least one fan in a torque-transmitting manner. The displacement unit is preferably arranged on and / or next to the fan. The displacement unit is preferably configured to set and / or adapt a drive torque introduced into the fan, with which the fan is operated. In other words, it is preferably provided that a torque generated or generateable by the displacement unit as required is or can be transmitted mechanically into and / or to the fan. In other words, the displacement unit preferably only generates as much torque as is currently required by the fan for the respective operating situation and / or machine configuration. A work machine designed in this way allows particularly efficient operation of the at least one fan.The displacement unit in the form of an adjustable drive is preferably understood to be a hydraulically operated motor (adjustable motor) or a hydraulically operated pump (adjustable pump) with adjustable and / or adaptable displacement. Such a displacement unit can be designed, for example, in the form of an axial piston pump or a radial piston motor.

[0009] The term "displacement volume" preferably refers to the volume or quantity of hydraulic fluid that the displacement unit displaces or requires per revolution. The displacement volume can be adjusted, for example, via an adjusting disc or an adjusting ring within the displacement unit.

[0010] In a preferred embodiment of the work machine according to the invention, a torque-transmitting coupling device is provided, by means of which the displacement unit and the fan are connected to one another. The coupling device preferably comprises at least one drive shaft arranged between the displacement unit and the fan. Alternatively or additionally, the coupling device comprises at least one flange or the like by means of which the displacement unit and / or the at least one drive shaft is connected to the fan, in particular to a rotor arranged within the fan. Furthermore, a step-up or step-down gear, e.g. in the manner of a gearbox, can also be provided within the coupling device. In such an embodiment, the force and / or the torque can be transmitted particularly easily and reliably from the displacement unit to the fan.

[0011] In a further development of the work machine according to the invention, at least one adjustment device is assigned to the displacement unit, by means of which the displacement volume can be adjusted proportionally, preferably continuously or in stages, or in the manner of a two-point adjustment. The adjustment device is preferably designed to vary the displacement volume of the displacement unit. In particular, it can be provided that, in order to adjust the displacement volume, an adjustment disk or an adjustment ring within the displacement unit can be adjusted by means of the adjustment device. The adjustment device allows the displacement volume to be adjusted from the outside on the displacement unit. Furthermore, it can be provided that the adjustment means and thus the displacement volume can be adjusted or is adjusted before and / or during operation of the work machine.Alternatively or additionally, the adjustment means and thus the displacement volume can also be adjustable and / or at least limited by the machine manufacturer.

[0012] In another preferred embodiment of the work machine according to the invention, the adjustment device is at least partially designed as an electronic adjustment device, by means of which the displacement volume of the displacement unit can be adjusted remotely and / or automatically. The adjustment device can be actuated automatically by a control and / or regulation system of the agricultural work machine and / or by an operator via an electronic operating device, such as a switch, button, rotary control, slide control, or a touch control panel. Such an embodiment allows for particularly convenient and / or dynamic adjustment of the displacement unit or the displacement volume.

[0013] In another development of the work machine according to the invention, the adjustment device comprises at least one mechanical adjustment means, which is provided in an adjustable and / or replaceable manner for adjusting the displacement volume. The adjustment means is preferably designed in the manner of at least one externally adjustable threaded screw and / or at least one externally adjustable stop, for example a stop screw. Alternatively or additionally, at least one adjustment means can be provided on the displacement unit, which is replaceable for adjusting the displacement volume. The adjustment means is preferably designed so that it can be adjusted by an operator.

[0014] In a preferred embodiment of the agricultural work machine according to the invention, the adjustment means comprises at least one adjustable actuator, which is particularly preferably remotely operable. Furthermore, the hydraulic system is in particular assigned at least one hydraulic pressure supply device, which is intended to provide and / or supply at least one hydraulic fluid with at least a first pressure level for the one or more consumers and the displacement unit. The pressure supply device can be at least partially assigned to the agricultural work machine and / or a tractor that can be coupled to the agricultural work machine. For example, the pressure supply device can comprise one or more hydraulic control units assigned to the tractor and / or the work machine, such as tractor control units.Alternatively or additionally, the pressure supply device may also comprise one or more hydraulic motors and / or hydraulic pumps assigned to the tractor and / or agricultural work machine that convey the hydraulic fluid.

[0015] In a further preferred embodiment of the work machine according to the invention, the displacement volume of the displacement unit is adjustable to adapt the first pressure level, in particular to a second pressure level, and / or to adapt a drive power of the fan. In other words, it is provided that the first pressure level provided and / or deliverable by the pressure supply device can be adapted by means of the displacement unit to a second pressure level, which is preferably different from the first pressure level. The second pressure level can be higher or lower than the first pressure level as required. The displacement volume of the displacement unit can also be adjustable such that at least temporary pressure fluctuations at the pressure supply device and / or the first pressure level can be at least partially compensated for driving the fan.For example, the displacement volume and / or second pressure level can be adjusted such that the first pressure level is at least virtually independent and / or adaptable, for example, increased or reduced, while maintaining a constant drive power of the fan. Conversely, the displacement volume and / or the second pressure level can also be adjusted such that the drive power of the fan is at least virtually independent and / or adaptable, for example, increased or reduced, while maintaining a constant first pressure level. With such an embodiment, the operation of the agricultural machine is enabled with even greater efficiency.

[0016] Furthermore, it is preferably provided that the hydraulic system comprises at least one hydraulic line, in particular a hydraulic circuit, which can be connected to the pressure supply device and / or to the displacement unit in a fluid-conducting manner, for the one or more consumers or the working units and / or the at least one blower.

[0017] In a further development of the work machine according to the invention, the displacement unit is configured, by adjusting the displacement volume, to adjust, preferably increase, the pressure level in the hydraulic line, preferably in the hydraulic circuit, for the one or more consumers, preferably the working units, compared to the first pressure level to a second pressure level. Furthermore, it is preferably provided that the first pressure level provided via the pressure supply device, in particular the tractor control unit and / or the hydraulic control unit assigned to the work machine, can be adjusted or increased for the consumers by means of the displacement unit. In particular, such that the one or more consumers or working units can be operated with a second pressure level that is changed, in particular increased, compared to a first pressure level referred to as the supply pressure.For example, it can be provided that the absorption volume can be reduced or is reduced in order to increase the pressure level from the first to the second pressure level.

[0018] Conversely, it can also be provided, for example, that the absorption volume can be or is increased in order to reduce the pressure level from the first to the second pressure level.

[0019] Furthermore, the work machine comprises at least one share that can be engaged with the soil at an adjustable working pressure. The share can be designed, for example, in the manner of a row unit or a sowing unit. Furthermore, the share can be designed in the manner of a tine or disc share.

[0020] Furthermore, a work machine according to the invention is preferred in which the adjustable working pressure of the blade is adjustable by means of the displacement unit, in particular by changing the displacement volume and / or at least almost independently of the drive power for the fan. Preferably, it is provided that the at least one blade can be subjected to the first pressure level provided by the pressure supply device and / or the adjustable working pressure results from the first pressure level, while the at least one fan can be operated at a second pressure level adjusted relative to the first pressure level.

[0021] In this context, the term "independent" is preferably understood to mean that the pressure level for the one or more consumers and / or the working pressure can be adjusted while maintaining at least a virtually unchanged or constant drive power of the blower. Alternatively or additionally, the term "independent" in this context is preferably also understood to mean that the drive power of the blower can be adjusted while maintaining at least a virtually unchanged or constant pressure level for the one or more consumers and / or the working pressure.

[0022] Furthermore, the term "working pressure" preferably refers to a boom pressure, for example of a boom or machine frame, or a coulter pressure, for example for one or more coulters. In particular, it can be provided that several coulters are arranged on a boom or machine frame subjected to a boom pressure.

[0023] Furthermore, at least one metering and / or depositing device for the distribution material can be assigned to the at least one blade. The metering and / or depositing device can be designed, for example, in the manner of a portioning and / or singling device for the on-demand metering and / or depositing of individual distribution material grains. The metering and / or depositing device can also be operated hydraulically and / or pneumatically depending on the first pressure level.

[0024] In another preferred embodiment of the work machine according to the invention, the displacement volume of the displacement unit is adjustable depending on the material to be distributed, preferably a distribution material quality and / or a distribution material type. The displacement volume can be adapted to the respective distribution material to be applied before and / or during operation of the work machine. Preferably, a first displacement volume is provided and / or adjusted for a first distribution material type and / or a first distribution material quality, and a second or different displacement volume, in particular one different from the first displacement volume, is provided and / or adjusted for at least one other distribution material type and / or another distribution material quality. Alternatively or additionally, the displacement volume can be adjusted and / or adjusted during operation depending on a distribution result with which the distribution material is distributed and / or deposited on the usable area.Monitoring the quality, type, and / or distribution results of the material being distributed can be carried out automatically using sensors and / or manually by the operator. This type of implementation has a particularly positive effect on the work result and / or the distribution accuracy of the machine.

[0025] Alternatively or additionally, the displacement volume can also be adjustable and / or adapted during operation depending on the travel and / or working speed of the working machine.

[0026] The object underlying the invention is also achieved with a hydraulic system for an agricultural work machine, preferably a distribution machine, wherein the work machine, in particular a distribution machine, is designed according to at least one of the above-described preferred embodiments of the agricultural work machine according to the invention. With regard to the advantages and modifications of the hydraulic system according to the invention, reference is therefore first made to the advantages and modifications of the work machine according to the invention. In the hydraulic system according to the invention, it is preferably provided that the displacement volume of the displacement unit is pre-settable and / or adjustable depending on a machine configuration of the agricultural work machine, preferably a distribution machine. The hydraulic system, in particular the displacement volume, can thus be optimally adapted to the respective options with which the work machine is equipped orThe term "options" here preferably refers to the number and / or type of hydraulic consumers, in particular working units, and / or their configurations or settings. With such an embodiment, the efficiency of the hydraulic system and thus of the working machine is further increased.

[0027] The term "presettable" preferably refers to the setting of a defined displacement volume for a machine configuration and / or option. Alternatively or additionally, the term "presettable" refers to the limitation of the displacement volume to a defined displacement volume range with a defined maximum and / or minimum displacement volume.

[0028] The object underlying the invention is also achieved with a method for operating an agricultural work machine, preferably a distribution machine, wherein the work machine is designed according to at least one of the above-described preferred embodiments of the agricultural work machine according to the invention. With regard to the advantages and modifications of the method according to the invention, reference is therefore first made to the advantages and modifications of the agricultural work machine according to the invention.

[0029] The method according to the invention provides that the displacement unit is designed in the manner of an adjustable drive, preferably a variable displacement motor or a variable displacement pump, with an adjustable or variable displacement volume, which is mechanically and force-transmittingly coupled to the blower. Thus, the torque generated by the displacement unit is mechanically transmitted to the blower during operation of the working machine. Meanwhile, the displacement unit is hydraulically driven depending on the set displacement volume. In other words, hydraulic energy is converted into mechanical energy via the displacement unit in an adjustable and / or adaptable manner.

[0030] The hydraulic system is preferably assigned at least one hydraulic pressure supply device, which is intended for providing and / or supplying at least one hydraulic fluid with at least a first pressure level for the one or more consumers and the displacement unit.

[0031] In a particularly preferred embodiment of the method according to the invention, the displacement volume of the displacement unit is adjusted to adapt the first pressure level, in particular to a second pressure level, and / or to adapt the drive power of the blower. The displacement volume and / or pressure level is preferably adjusted as needed to the requirements of the blower.

[0032] In addition, the hydraulic system comprises at least one hydraulic line, preferably a hydraulic circuit, which can be connected to the pressure supply device and / or to the displacement unit in a fluid-conducting manner, for the one or more consumers, in particular working units, and / or the at least one blower.

[0033] In a particularly preferred development of the method according to the invention, the pressure level in the hydraulic line, preferably in the hydraulic circuit, for the one or more consumers, in particular working units, is adjusted, preferably increased, to a second pressure level by changing the displacement volume of the displacement unit compared to the first pressure level. Alternatively or additionally, the pressure level in the hydraulic line, in particular in the hydraulic circuit, for the one or more consumers, in particular working units, can be reduced to a second pressure level by changing the displacement volume of the displacement unit compared to the first pressure level. Furthermore, the work machine preferably comprises at least one share that can be brought into engagement with the ground at an adjustable working pressure and / or at least one boom or machine frame on which a plurality of shares are arranged.The working pressure can preferably be set as a share pressure directly on at least one share and / or as a boom pressure on the boom or machine frame.

[0034] In a further particularly preferred embodiment of the method according to the invention, the working pressure is adjusted by means of the displacement unit, in particular by changing the displacement volume and / or at least almost independently of the drive power for the blower. To increase the working pressure, the first pressure level provided via the pressure supply device is preferably increased, while the displacement volume and / or the second pressure level is adjusted such that the drive power of the blower remains at least almost the same or unchanged. Conversely, to reduce the working pressure and / or to increase the drive power of the blower, the first pressure level provided via the pressure supply device is reduced or maintained, while the displacement volume and / or the second pressure level is adjusted such that the drive power of the blower increases.

[0035] Preferably, at least one distribution material to be spread, preferably a distribution material quality and / or distribution material type, is detected and / or selected. Alternatively or additionally, the agricultural work machine, preferably a distribution machine, is filled with at least one distribution material, in particular with a defined distribution material quality and / or distribution material type.

[0036] In a further particularly preferred development of the method according to the invention, the displacement volume of the displacement unit is set and / or adjusted depending on the at least one, in particular detected, selected and / or filled, distribution material. Alternatively or additionally, the displacement volume of the displacement unit is adjusted depending on the distribution result. Furthermore, the displacement volume of the displacement unit is alternatively or additionally set and / or adjusted depending on the travel and / or working speed of the work machine.

[0037] Furthermore, it should be explicitly mentioned here that the agricultural work machine described above is not limited to a distribution machine. In other likewise preferred embodiments of an agricultural work machine according to the invention, the work machine can be designed, for example, as a field sprayer for spreading spraying agent or as a spreader for spreading material, such as fertilizer. In a field sprayer, the fan, which is mechanically and / or force-transmittingly coupled to the displacement unit, is preferably designed in the manner of a pump. In a further preferred alternative embodiment of the agricultural work machine, in which the work machine or the spreader is designed in the manner of a centrifugal fertilizer spreader, the fan can alternatively also be designed as a drive or motor for at least one centrifugal disc.

[0038] Further details of the invention can be found in the example description and the drawing. The drawing shows

[0039] Fig.1 shows a schematic hydraulic circuit diagram for an agricultural working machine according to the invention.

[0040] In Fig.1, a schematically indicated hydraulic circuit diagram of a hydraulic system 10, which is intended for an agricultural working machine not shown, can be seen.

[0041] The working machine can be designed in the manner of a distribution machine, such as a seed drill, a field sprayer or a spreader.

[0042] The illustrated hydraulic system 1 comprises, among other things, a pressure supply device 10, which here, by way of example, is assigned to a tractor that can be coupled to the work machine and is also not shown in the figure. Alternatively or additionally, the pressure supply device 10 can also be assigned to the work machine and / or arranged on the work machine. The pressure supply device 10 has a hydraulic pump 11 and several hydraulic control units 12A-12D, also referred to as tractor control units. Furthermore, the pressure supply device 10 also has a reservoir for a hydraulic fluid, referred to as a hydraulic tank 13. The pressure supply device 10 is designed, in particular by means of connecting couplings 14A, 14B, to be connected in a fluid-conducting manner to a hydraulic part 20 of the hydraulic system 1 assigned to the work machine.Furthermore, the pressure supply device 10 is designed to provide and / or deliver the hydraulic fluid at a corresponding, in particular first, pressure level.

[0043] The hydraulic system 1 further comprises one or more hydraulic consumers 21A-21D, which can be actuated and / or operated hydraulically, in particular with the hydraulic fluid. The first consumers 21A, 21B are designed, for example, as hydraulic actuating cylinders. The second consumers 21C, 21D are designed, for example, in the manner of hydraulic motors. Alternatively or additionally, the consumers 21A-21D can also be designed in the manner of other agricultural work units, such as sowing units or the like. For example, a sowing unit can also be a sowing coulter or a row unit with an associated and / or hydraulically operated metering and / or placement device.

[0044] The consumers 21 A - 21 D are each connected in a fluid-conducting manner via a first hydraulic line 2 to the pressure supply device 10, via which the hydraulic fluid is supplied at a first pressure level. Furthermore, a further hydraulic control unit 22 is arranged between the first consumers 21 A, 21 B and the pressure supply device 10, by means of which further hydraulic control unit 22 the first pressure level for the first consumers 21 A, 21 B can optionally be adapted and / or limited to a further / different pressure level. In particular, in the exemplary embodiment shown, the illustrated first consumers 21 A, 21 B or the actuating cylinders are set up to supply working units designed as sowing coulters and / or at least one boom on which a plurality of sowing coulters are arranged with a defined working pressure ora defined actuating force, which depends on the set pressure level and which can also be referred to as share pressure and / or boom pressure. Furthermore, it is particularly provided that the second consumers 21C, 21D, designed here as hydraulic motors, are each configured to operate a metering and / or depositing device designed as a singling device, or alternatively, other working units.

[0045] Furthermore, the hydraulic system 1 is provided by means of a displacement unit 30 to drive at least one blower 40 assigned to the work machine. The blower 40 is configured to pneumatically pressurize one or more conveying lines of the work machine and / or to pneumatically convey material to be distributed, for example, from an assigned storage container.

[0046] According to the invention, the displacement unit 30 is designed in the manner of an adjustment drive, in particular an adjustment motor or an adjustment pump, with an adjustable displacement volume and is coupled to the blower 40 in a mechanical and force-transmitting manner.

[0047] A torque-transmitting coupling device 31 is provided to connect the displacement unit 30 to the fan 40. The coupling device 31 is designed, for example, in the manner of a drive shaft, which is connected in particular to a rotor arranged in the fan 40. Alternatively or additionally, the coupling device 31 can also comprise at least one clutch device and / or a transmission device.

[0048] As can also be seen, the displacement unit 30 is assigned an adjustment device 32, by means of which the displacement volume can be adjusted proportionally, in particular continuously or in stages. Alternatively or additionally, the displacement volume can also be adjusted in a two-point manner.

[0049] The adjustment device 32 shown here has a first adjustment means 320, which is designed here, for example, as a hydraulically actuated actuator 320 in the manner of an actuating cylinder or the like and is connected to the displacement unit 30. For remote actuation of the first adjustment means 320 or the actuator, the adjustment device 32 is further assigned a second adjustment means 321, which is designed here, for example, as an actuable hydraulic switching and / or control valve. Depending on the design, the adjustment device 32 can be actuated manually by an operator and / or automatically by a control and / or regulation system assigned to the work machine. As an alternative to the illustrated embodiment, the adjustment device 32 can comprise only one adjustment means 320, 321 or more than two adjustment means 320, 321.Furthermore, the adjustment device 32 can alternatively or additionally comprise at least one adjustment means configured as a threaded screw and / or a stop screw, which is adjustable for adjusting or influencing the displacement. Furthermore, the adjustment device 32 can also comprise at least one adjustment means configured as a replacement part, which is replaceable for adjusting or influencing the displacement. Alternatively or additionally, the adjustment device 32 can also be configured as an electronic adjustment device 32 for electronically adjusting the displacement.

[0050] Furthermore, it is provided that the displacement volume of the displacement unit 30 is adjustable to adapt the first pressure level, in particular that provided and / or supplied by the pressure supply device. The first pressure level can thus be adapted to a second pressure level, in particular one that is increased or reduced compared to the first pressure level, depending on the setting of the displacement volume of the displacement unit 30. In particular, an adjustment of the displacement volume is provided for setting and / or adapting a drive power of the blower 40. Alternatively or additionally, it is provided that the displacement unit 30 is configured, by means of an adjustment of the displacement volume, to adapt the pressure level, in particular the first pressure level, in the hydraulic line 2 for the one or more consumers or working units, for example to increase or decrease it.

[0051] In a further alternative or additional embodiment, it can also be provided that the working pressure of the consumers 21 A-21 D, for example the coulter pressure of a sowing coulter and / or the boom pressure of a boom, can be adjusted by means of the displacement unit 30, in particular by changing the absorption volume and / or at least almost independently of the drive power for the fan 40.

[0052] Furthermore, in yet another embodiment, it is conceivable that the absorption volume of the displacement unit 30 is alternatively or additionally adjustable depending on the material to be distributed, in particular a quality of the material to be distributed, a type of the material to be distributed and / or a distribution result.

[0053] Furthermore, alternatively or additionally, it can be provided that the displacement volume of the displacement unit 30 is presettable and / or adjustable depending on a machine configuration of the agricultural work machine. The machine configuration or machine equipment or option can depend on the type and number of hydraulic consumers 21A-21D, in particular the working units, and the blowers 40. Furthermore, the machine configuration can also depend on the number and / or dimensions of the attached and / or connected pneumatic conveying lines, in particular for the distribution material.

[0054] It is understood that the features mentioned in the previously described embodiment are not limited to these specific combinations and are also possible in any other combinations. Furthermore, it is understood that the geometries shown in the figures are only examples and are also possible in any other configurations. List of reference symbols

[0055] 1 hydraulic system

[0056] 2 hydraulic lines

[0057] 10 Pressure supply device

[0058] 11 Hydraulic pump

[0059] 12A-12D Hydraulic control units

[0060] 13 Hydraulic tank

[0061] 14A, 14B connecting couplings

[0062] 20 Part of the hydraulic system assigned to the working machine

[0063] 21 A, 21 B First hydraulic consumers

[0064] 21 C, 21 D Second hydraulic consumers

[0065] 22 Additional hydraulic control unit

[0066] 30 Displacement unit

[0067] 31 Coupling device

[0068] 32 Adjustment device

[0069] 320 First setting means

[0070] 321 Second setting means

[0071] 40 blowers

Claims

Patent claims 1. Agricultural work machine, preferably a distribution machine for spreading material on an agricultural area, comprising; - at least one blower (40) for pneumatically actuating one or more conveying lines and / or for conveying material to be distributed; and - a hydraulic system (1) for hydraulically actuating and / or operating one or more consumers (21A-21D), preferably working units; wherein the hydraulic system (1) has at least one hydraulic displacement unit (30) provided for driving the blower (40), characterized in that the displacement unit (30) is designed in the manner of an adjustable drive, preferably an adjustable motor or a variable displacement pump, with an adjustable displacement volume, which is coupled to the blower (40) in a mechanical and force-transmitting manner.

2. Working machine according to claim 1, characterized by a torque-transmitting coupling device (31) by means of which the displacement unit (30) and the fan (40) are connected to one another.

3. Work machine according to at least one of the preceding claims, characterized in that the displacement unit (30) is assigned at least one adjusting device (32), by means of which the displacement volume can be adjusted proportionally, preferably continuously or stepped, or in the manner of a two-point adjustment.

4. Work machine according to claim 3, characterized in that the adjusting device (32) is at least partially designed in the manner of an electronic adjusting device (32), by means of which the displacement volume of the displacement unit (30) can be adjusted remotely and / or automatically.

5. Work machine according to at least one of the preceding claims 3 or 4, characterized in that the adjusting device (32) comprises at least one mechanical adjusting means (320, 321) which is provided in an adjustable and / or replaceable manner for adjusting the displacement volume.

6. Work machine according to at least one of the preceding claims, wherein the hydraulic system (1) is assigned at least one hydraulic pressure supply device (10), which is provided for providing and / or supplying at least one hydraulic fluid with at least a first pressure level for the one or more consumers (21 A- 21 D) and the displacement unit (30), characterized in that the absorption volume of the displacement unit (30) is adjustable for adapting the first pressure level, in particular to a second pressure level, and / or for adapting a drive power of the fan (40).

7. Work machine according to claim 6, wherein the hydraulic system (1) comprises at least one hydraulic line (2), preferably a hydraulic circuit, for the one or more consumers (21A-21D), preferably working units, which can be connected in a fluid-conducting manner to the pressure supply device (10) and / or to the displacement unit (30), characterized in that the displacement unit (30) is designed, by means of an adjustment of the displacement volume, to adjust, preferably increase, the pressure level in the hydraulic line (2), preferably the hydraulic circuit, for the one or more consumers (21A-21D), preferably working units, compared to the first pressure level to a second pressure level.

8. Working machine according to at least one of the preceding claims 6 or 7, wherein the working machine comprises at least one share which can be brought into engagement with the ground at an adjustable working pressure, characterized in that the working pressure is adjustable by means of the displacement unit (30), in particular by changing the absorption volume and / or at least almost independent of the drive power for the fan (40).

9. Work machine according to at least one of the preceding claims, characterized in that the absorption volume of the displacement unit (30) is adjustable depending on the material to be distributed, preferably a quality of the material to be distributed and / or a type of the material to be distributed.

10. Hydraulic system (1) for an agricultural working machine, preferably a distribution machine for spreading distribution material on an agricultural area, according to at least one of the preceding claims, characterized in that the absorption volume of the displacement unit (30) can be preset and / or adapted depending on a machine configuration of the agricultural working machine, preferably a distribution machine. 11 .A method for operating an agricultural working machine, preferably according to at least one of the preceding claims, comprising; - at least one blower (40) for pneumatically actuating one or more conveying lines and / or for conveying material to be distributed; and - a hydraulic system (1) for hydraulically actuating and / or operating one or more consumers (21A-21D), preferably working units; wherein the hydraulic system (1) has at least one hydraulic displacement unit (30) provided for driving the blower (40), characterized in that the displacement unit (30) is designed in the manner of an adjustable drive, preferably an adjustable motor or a variable displacement pump, with an adjustable displacement volume, which is coupled to the blower (40) in a mechanical and force-transmitting manner.

12. The method according to claim 11, wherein the hydraulic system (1) is assigned at least one hydraulic pressure supply device (10) which is used for Providing and / or supplying at least one hydraulic fluid with at least a first pressure level for the one or more consumers (21 A-21 D) and the displacement unit (30), characterized in that the absorption volume of the displacement unit (30) is adjusted to adapt the first pressure level, in particular to a second pressure level, and / or to adapt a drive power of the blower (40).

13. The method according to claim 12, wherein the hydraulic system (1) comprises at least one hydraulic line (2), preferably a hydraulic circuit, which can be connected to the pressure supply device (10) and / or to the displacement unit (30) in a fluid-conducting manner, for the one or more consumers (21 A- 21 D), preferably working units, characterized in that the pressure level in the hydraulic line (2), preferably in the hydraulic circuit, for the one or more consumers (21 A- 21 D), preferably working units, is adapted, preferably increased, to a second pressure level by means of a change in the absorption volume of the displacement unit (30) compared to the first pressure level.

14. Method according to at least one of the preceding claims 11 to 13, wherein the working machine comprises at least one share which can be brought into engagement with the ground at an adjustable working pressure, characterized in that the working pressure is adjusted by means of the displacement unit (30), in particular by changing the absorption volume and / or at least almost independently of the drive power for the fan (40).

15. Method according to at least one of the preceding claims 11 to 14, with at least one of the following steps: - Selecting at least one distribution material to be distributed, preferably a distribution material quality and / or distribution material type; and / or - Filling the agricultural working machine, preferably a distribution machine, with at least one distribution material, in particular with a defined distribution material quality and / or distribution material type; characterized by the step: - Adjusting the absorption volume of the displacement unit (30) as a function of the at least one distribution material.

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