Battery system for tamping assembly

Abstract

The invention relates to a battery system (1) for at least one tamping assembly (9), comprising a motor-hydraulic pump unit (2), a hydraulic accumulator (3), and measuring units (4), arranged to provide a hydraulic medium having a hydraulic supply pressure (pV) for hydraulic actuators (94) of the tamping assembly (9), wherein the motor-hydraulic pump unit (2) is designed to be adjustable and enables a change in the delivery flow of hydraulic medium to the hydraulic actuators (94) by means of the hydraulic pump (221), wherein a controller unit (7) for controlling the delivery flow is connected to an actuating unit (225) of the motor-hydraulic pump unit (2) and signal lines of the measuring units (4) are connected to inputs of the controller unit (7), wherein an output of the controller unit (7) is connected to an input of the actuating unit (225) of the motor-hydraulic pump unit (2) for pilot control, a storage unit (73) and an evaluation unit (74) are arranged for storing and evaluating an operating requirement for hydraulic supply pressure (pV) and / or the volume flow of the hydraulic medium in the tamping unit (9), as detected by the measuring units (4), and the controller unit (7, 72) is also designed to compensate for deviations from the hydraulic medium volume flow and / or the hydraulic supply pressure (pV) predicted by means of the evaluation unit (74).

Description

[0001] Battery system for stuffing unit

[0002] The invention relates to a battery system for at least one tamping unit of a track construction machine comprising a motor-hydraulic pump unit, a hydraulic accumulator and measuring units, arranged to provide hydraulic medium with a hydraulic supply pressure p v for hydraulic actuators of the stuffing unit, wherein the motor-hydraulic pump unit is adjustable and allows a change in the flow rate of hydraulic medium to the hydraulic actuators by means of the hydraulic pump, wherein furthermore a control unit for controlling the flow rate is connected to an actuation unit of the motor-hydraulic pump unit and signal lines of the measuring units are connected to inputs of the control unit.

[0003] Tamping units are used to create a correct track alignment of a railway track, which is part of a rail network for the transport of goods and the carriage of people with the help of rail vehicles.

[0004] For this purpose, tamping units for the simultaneous processing of the ballast layer, on which one or more sleepers of the track to be corrected are located, are arranged on track construction machines.

[0005] Track construction machines are special rail vehicles due to the work units they carry, in particular lifting, aligning and tamping units, which move the work units in a track section where the track alignment needs to be corrected, from one group of sleepers to be worked on to the next group of sleepers following in the direction of work.

[0006] The tamping process is characterized by successive work phases in which the tamping tools of the

[0007] Stuffing aggregates are subjected to periodically changing loads.

[0008] Similarly, during the tamping process, lifting and aligning units are subject to a work cycle in which the track grid section is raised before the sleeper support is tamped down and lowered into a correct position after tamping has been completed.

[0009] During the tamping process, four pairs of tamping tools, arranged parallel to a sleeper and intended to work the ballast layer of this sleeper, are usually lowered vertically from a rest position above the ballast layer until they penetrate the ballast layer.

[0010] Once the tamping picks of the tamping tools have reached their vertical end position within the ballast layer, the pairs of tamping tools are moved towards each other by an adjustment movement and the ballast of the ballast layer is redistributed, thereby specifically influencing the sleeper support.

[0011] After the tamping tool pairs have been moved and the sleeper bedding has been successfully compacted, they are raised vertically again and reset so that the tamping picks reach their resting position above the ballast layer. From there, they are transported to the next sleeper to be worked on by the track construction machine's movement. 3

[0012] There is also a known embodiment of the track construction machine in which the track construction machine itself is continuously moved on the track in the working direction and a separate machine frame, in which working units such as the tamping unit are arranged, is moved relative to the continuously moving track construction machine in such a way that the tamping tool pairs perform the discontinuous movement in the working direction described above.

[0013] This movement sequence is superimposed in one or more phases with a vibration movement of the tamping tool pairs to promote the immersion of the tamping picks into the gravel layer and the redistribution of the gravel in the gravel layer.

[0014] The positioning of the movement sequences of the tamping tools is usually achieved by hydraulic actuators in combination with components for mechanical force transmission, force redirection, especially mechanical levers, and force distribution.

[0015] Due to the varying load on the tamping tools, especially the tamping picks, which are in direct contact with the gravel and depend on the work step, the required supply pressure of the hydraulic medium for the hydraulic actuators is subject to fluctuations over time.

[0016] To provide this hydraulic supply pressure, a battery system is typically used, which includes at least a hydraulic pump, a hydraulic accumulator, and pressure sensors as essential functional components. During operation, the demand for the hydraulic medium, especially hydraulic oil, for the hydraulic actuators is generally subject to strong, but cyclical, fluctuations.

[0017] It also happens that the pressure provided by the battery system is minimal before a consumption peak, and the consumption peak results in significant pressure drops.

[0018] These pressure drops have a negative impact on the function of the tamping unit and the performance of the track construction machine.

[0019] In the prior art, the pressure provided by the battery system is controlled by a two-point control within a specific pressure range Ap, which is defined by a minimum hydraulic pressure value p.min and a maximum hydraulic pressure value p max It is established to maintain one's rights.

[0020] If the supplied pressure p falls below the minimum pressure value p min , the pumping unit of the battery system, which includes at least one hydraulic pump, is controlled to pump the maximum possible amount of hydraulic fluid.

[0021] However, if the maximum pressure value p max Once the threshold is reached and exceeded, the battery system's pumping unit switches off.

[0022] To reduce the pressure fluctuations within the limits of the pressure range Ap, which occur during two-point control, hydraulic pumps with adjustable delivery capacity are used.

[0023] These hydraulic pumps operate with pressure control, either through internal or external hydromechanical feedback.

[0024] Due to a system-related response delay of such a control system, pressure fluctuations cannot be completely avoided in this case either.

[0025] Given specific performance requirements during a step of the tamping cycle, for example during the lowering movement of the tamping picks before immersion in the gravel layer and during the positioning movement of the tamping tool pairs in the gravel layer, a larger volume flow of the hydraulic medium is required in the hydraulic actuators.

[0026] This increased demand for hydraulic fluid is achieved by increasing the delivery capacity of the hydraulic pump of the battery system.

[0027] In pressure-controlled hydraulic pumps, the measured pressure p at the hydraulic pump outlet is regulated to a predetermined setpoint pressure when the delivery rate is increased, according to the state of the art.

[0028] If the peak hydraulic oil demand required for the hydraulic units can no longer be covered by the maximum flow rate of the hydraulic pump and hydraulic medium is therefore supplied from the hydraulic accumulator of the battery system, undesirable drops in hydraulic pressure at the hydraulic pump outlet also occur with these pressure-controlled hydraulic pumps of a battery system 6.

[0029] From the general state of the art for the control of hydraulic systems of fenbart WO 2024 / 194329 Al a method and a hydraulic system for carrying out this method, which controls a combination of drive motor and displacement unit on the one hand by means of a closed control loop, to which a setpoint profile is specified, and in which, on the other hand, additional control signals for adjusting the pressure medium supply of at least one hydraulic actuator are generated by means of a knowledge-based decision system.

[0030] The invention is based on the objective of providing a battery system for supplying hydraulic fluid at a given hydraulic supply pressure p. v to specify an improvement over the state of the art for a stuffing unit of the type mentioned above.

[0031] Furthermore, it is an object of the invention to disclose a method for operating this battery system.

[0032] According to the invention, these problems are solved by device claim 1 and method claim 12.

[0033] Dependent claims specify advantageous embodiments of the invention.

[0034] A battery system for at least one tamping unit of a track construction machine, comprising a motor-hydraulic pump unit, a hydraulic accumulator and measuring units, is arranged to provide hydraulic medium with a hydraulic supply pressure p v 24015

[0035] 7 for hydraulic actuators of the tamping unit, wherein the motor-hydraulic pump unit is adjustable and allows a change in the flow rate of hydraulic medium to the hydraulic actuators by means of the hydraulic pump, wherein furthermore a control unit for controlling the flow rate is connected to an actuation unit of the motor-hydraulic pump unit, and signal lines of the measuring units are connected to inputs of the control unit, as well as an output of the control unit for feedforward control is connected to an input of the actuation unit of the motor-hydraulic pump unit and for storing and evaluating an operating requirement of hydraulic supply pressure p detected with the aid of the measuring units vand / or volume flow of the hydraulic medium of a filling unit, a storage unit and an evaluation unit are arranged, and the control unit is further equipped to detect deviations from the volume flow of the hydraulic medium and / or the hydraulic supply pressure p predicted by the evaluation unit. v to compensate.

[0036] Avoiding drops in hydraulic supply pressure p v , which is provided by the battery system, and compensation for deviations from the determined or specified hydraulic supply pressure p' v This leads to more uniform tamping results when operating at least one tamping unit of the track construction machine.

[0037] The setpoint of the hydraulic supply pressure p' v This is either a constant predicted supply pressure value or a predicted supply pressure value curve p' v (t) . 24015

[0038] 8

[0039] Other functions of the track construction machine are controlled by the feedforward control of the supply pressure p. v , which is provided to the plugging unit by the battery system, is little or not affected.

[0040] In particular, mutual interference caused by pressure drops due to fluctuations in consumption is reduced or avoided.

[0041] It is particularly advantageous if additional control units and regulation procedures monitor and regulate the pressure and / or flow rate of other hydraulic consumers, in addition to the

[0042] The tamping units are arranged on the track construction machine and are powered by the same battery system.

[0043] In a preferred embodiment, the storage unit and / or evaluation unit are subunits of the controller unit.

[0044] Alternatively, the storage unit and / or the evaluation unit are separate units from the controller unit, which exchange data or data sets with it via data connections.

[0045] In one design variant, it is advantageous if the battery system is equipped with a hydraulic pump of the adjustable motor-hydraulic pump unit, which is a hydraulic pump with constant displacement volume.

[0046] In a particularly advantageous version of the battery system, the hydraulic pump of the adjustable motor-hydraulic pump unit is preferably a hydraulic pump with variable displacement volume. 24015

[0047] 9

[0048] In this version, the motor of the adjustable motor-hydraulic pump unit of the battery system is a constant speed motor.

[0049] Alternatively, it is advantageous if the motor of the adjustable motor-hydraulic pump unit of the battery system is a variable speed motor.

[0050] This particular design variant offers further advantages, including shorter response times when the demand for hydraulic fluid changes in order to maintain the supply pressure p. v and improved controllability of this controlled variable p v .

[0051] In another cost-effective version of the battery system, at least one additional hydraulic pump and / or one additional motor-hydraulic pump unit can be switched on using the controller unit.

[0052] This is particularly advantageous when, due to the predicted demand for hydraulic fluid or the measured hydraulic supply pressure p v , an increase in hydraulic delivery rate, a shorter response time and better controllability of the supply pressure p vwhich has the following consequences.

[0053] Preferably, at least one additional hydraulic accumulator can be switched on using the control unit.

[0054] In another advantageous embodiment of the battery system, at least one hydraulic valve is arranged in the hydraulic pressure line downstream of the motor-hydraulic pump unit, which is controlled by the controller unit. 24015

[0055] 10

[0056] The arrangement of these additional hydraulic pumps, motor-hydraulic pump units, hydraulic accumulators and / or hydraulic valves allows for influencing the flow rate of hydraulic fluid and / or the supply pressure p. v of the hydraulic medium.

[0057] It is particularly advantageous if either a measuring unit with a pressure sensor for determining the hydraulic pump output pressure p is located at the output of the motor-hydraulic pump unit of the battery system, or a measuring unit with a pressure sensor for determining the hydraulic supply pressure p is located in the vicinity of the high-pressure line. v of the hydraulic medium.

[0058] Preferably, both the hydraulic pump outlet pressure p and the hydraulic supply pressure p can be used. v They are detected using a measuring unit with pressure sensors.

[0059] The output pressure p is also preferred. s of at least one hydraulic accumulator.

[0060] In an alternative embodiment, it is advantageous if a measuring unit with hydraulic feedback is arranged at the output of the motor-hydraulic pump unit in order to determine the volume flow rate of the hydraulic medium.

[0061] A method for providing hydraulic fluid with a hydraulic supply pressure p v The following steps are included for the hydraulic actuators of a tamping unit using a battery system in one of the aforementioned design variants: 24015

[0062] 11

[0063] ( 1 ) The time-continuous or continuously time-discrete determination of a measured value p v , k of the hydraulic supply pressure p v and / or a measured value of the volume flow rate of the hydraulic medium using the measuring unit;

[0064] ( 2 ) Transmission of the determined measured value p v , k to the deposit unit ;

[0065] (3) Determination of at least one parameter i necessary for the feedforward control of the motor-hydraulic pump unit from at least one time series { p v , i; Pv, 2; Pv, k H of the measured values ​​stored in the storage unit Pv, i; Pv, 2; p v, k using the evaluation unit ;

[0066] (4) Generation of the current feedforward signal using the current measured value {pv, kli and / or at least one necessary feedforward parameter i and / or the measured value {p v ,k} in at least one previous work cycle using the controller unit ;

[0067] ( 5 ) Output of the current pilot control signal from the controller unit to the actuating unit of the motor hydraulic pump unit .

[0068] The parameter determined in step 3 for the feedforward control of the motor-hydraulic pump unit is in particular a time constant i , preferably the average period T of a working cycle of the packing unit .

[0069] Conversely, the period T of a work cycle, together with a discrete measurement acquisition rate f, also serves to determine the length k of a measurement time series.

[0070] Therefore, in an alternative design variant, the period T of the control unit and, in particular, the storage unit is provided by another control device of the track construction machine. 24015

[0071] 12

[0072] This is in particular a central machine control system, which is responsible for monitoring and controlling the work cycles of the work units, especially the tamping cycles of the tamping units.

[0073] If additional hydraulic pumps, motor-hydraulic pump units and / or hydraulic accumulators are arranged, these are controlled in a supplementary process step by the control signal, in particular the pilot signal.

[0074] (6) The activation of at least one hydraulic pump and / or at least one motor-hydraulic pump unit and / or at least one hydraulic accumulator by means of the current pilot signal of the controller unit.

[0075] Finally, if hydraulic valves, in particular proportional valves, are also located in the pressure line of the battery system, these are also controlled in a further process step by the control signal, in particular the pilot signal.

[0076] ( 7 ) Control of at least one hydraulic valve using the current pilot signal from the controller unit .

[0077] The invention is explained below by way of example with reference to the accompanying figures. These show, in schematic representation:

[0078] Fig. 1 Motor-hydraulic pump unit according to the state of the art

[0079] Fig. 2 Battery system with pilot-operated pump 24015

[0080] 13

[0081] Fig. 3 Stuffing unit with battery system according to the invention

[0082] Fig. 4 Schematic representation of the battery system and the controller unit

[0083] A motor-hydraulic pump unit 2 for conveying hydraulic medium is shown in Figure 1.

[0084] A motor 21 with constant speed is mechanically coupled to a pressure-controlled, hydromechanically recirculated pump unit 22 by means of a common shaft 211, 224, which is formed, for example, by the mechanical connection of two shafts 211 and 224.

[0085] This hydraulic pump unit 22 includes a hydraulic pump

[0086] 221 with adjustable delivery rate, a hydraulic control line 222 and a hydromechanical actuation unit 223 .

[0087] The pump output is controlled by a hydraulic control line.

[0088] 222 and hydromechanical actuation unit 223 are fed back to the control input of the hydraulic pump 221, which serves to adjust the delivery rate.

[0089] The actuating unit 223 includes an adjustable mechanical spring 2231, with which a setpoint value of the hydraulic pressure p generated by the pump is set.

[0090] As soon as the hydraulic pump 221 delivers hydraulic fluid, the hydraulic pressure p is transmitted from the hydraulic pump outlet to the actuating unit 223 via hydraulic control line 222, and this adjusts the delivery rate of the hydraulic pump by acting on its 24015

[0091] 14

[0092] The control input moves the control element to adjust the delivery rate against the spring force of the mechanical spring 2231 and changes the delivery rate so that the hydraulic pressure p at the hydraulic pump output is maintained according to the set setpoint.

[0093] Figure 2, in contrast, shows an embodiment of the battery system 1 according to the invention, comprising a motor-hydraulic pump unit 2, a hydraulic accumulator 3, and a measuring unit 4 for detecting the hydraulic pressure p. v and conversion into an electrical measurement signal, a filter 5 for the hydraulic medium pumped from a container 6 by means of the hydraulic pump 221, and a control unit 7 for pilot control of the adjustable hydraulic pump 221 by means of an electromechanical actuating unit 225.

[0094] The hydraulic pump 221 with adjustable delivery capacity is mechanically coupled to an electric drive motor 21 with constant speed n by means of a common shaft 211 , 224 .

[0095] During operation, the hydraulic pump 221 delivers hydraulic fluid from the tank 6 via the hydraulic lines 65, 52, 23 and 28 to a hydraulic valve arrangement 8, which controls the hydraulic actuators 91, 94 of a stuffing unit 9.

[0096] A filter 5 is arranged to remove solids, especially metal particles, from the conveyed hydraulic medium.

[0097] The pressure p is measured via the measuring unit 4, which is connected to the supply line 28 by means of the hydraulic line 24. v the hydraulic medium is detected and converted into an electrical measurement signal p k converted, which is transmitted via the measurement signal line 47 to an input of the controller unit 7 .

[0098] The controller unit 7 uses the measured values ​​Pk obtained as measurement signals to generate an internally determined control signal, which is transmitted from an output of the controller unit 7 to the input of the electromechanical actuating unit 225 via the control line 72.

[0099] The electromechanical actuating unit 225 acts on the control element for adjusting the delivery rate of the hydraulic pump 221.

[0100] The hydraulic accumulator 3 is connected to the hydraulic pump 221 via the hydraulic line 23.

[0101] The pressure p provided by the hydraulic accumulator 3 s acts on the hydraulic valve arrangement 8 via the hydraulic line 28, in the event that the volume flow of the hydraulic medium is insufficient to maintain a required supply pressure p vThe flow rate of the hydraulic actuators 94 acting as consumers exceeds the flow rate provided by the motor-hydraulic pump unit at a pressure p.

[0102] This additional reservoir 3 of hydraulic fluid can thus meet an increased demand for hydraulic fluid to maintain a pressure requirement p. v in addition to the hydraulic pump control, it is covered by the controller unit 7.

[0103] The integration of the arrangement consisting of battery system 1 and controller unit 7 into the control of the hydraulic actuators 91, 94 of a tamping unit 9 is shown in Figure 3. 16

[0104] Within frame 97 of the tamping unit 9 are arranged two guide rods 92 and a hydraulic actuator 91.

[0105] The hydraulic actuator 91 enables a vertical lowering movement and an opposing upward movement of the slide 93, on which the tamping tool pairs are arranged.

[0106] The hydraulic fluid requirement and the hydraulic pressure required for this hydraulic actuator 91 are also provided by the battery system 1 according to the invention, which also results in the advantages of feedforward control and compensation by means of a controller unit 7 according to the invention for the positioning movements of this actuator 91.

[0107] An actuator similar to the hydraulic actuator 91 is also part of the lifting and aligning unit for raising and lowering the track grid section connected by the sleeper to be tamped.

[0108] The tamping tool pairs each comprise two hydraulic actuators 94 for the positioning movement and vibration, two pivot levers 95 and two tamping picks 96.

[0109] Alternatively, prior art also includes pairs of tamping tools in which the vibration is generated by a vibration drive, in particular an eccentric shaft, arranged between the hydraulic actuators 94. 24015

[0110] 17

[0111] The tamping tool pairs are lowered halfway into the ballast layer 12 in Figure 3, on which a track grid consisting of rail pair 10 and sleepers 11 to be tamped rests.

[0112] The hydraulic actuators 94 for the auxiliary movement and vibration are controlled by the valve arrangement 8 by means of hydraulic control lines 894.

[0113] The hydraulic medium with the required supply pressure p v The valve arrangement 8 is supplied by the battery system 1 via the hydraulic pressure line 18.

[0114] The supply pressure p vThe hydraulic medium supplied by the battery system 1 for the operation of the filling unit 9 is influenced by the control unit 7.

[0115] On the one hand, measured values ​​Pv, i ; Pv, 2 ; Pv, k are derived from various operating parameters, in particular from the pressure p of the hydraulic medium at the hydraulic pump outlet and from the supply pressure p v in the high-pressure line 18, the signal is transmitted from the battery system to the controller unit 7 via the measuring signal line 17.

[0116] On the other hand, a control signal, in particular a pilot signal, is used to generate a demand-based supply pressure p. v of the hydraulic medium, which is supplied to the hydraulic actuators 94 of the plugging unit by means of the hydraulic valve arrangement 8, is transmitted by the control unit 7 to the battery system 1 by means of the control signal line 71.

[0117] This or another control signal is also provided to the hydraulic actuator 91. 24015

[0118] 18

[0119] The hydraulic medium supplied by the battery system 1 is pumped from a container 6A to a higher energy level by means of motor-hydraulic pump units 2 and discharged into a container 6B by means of a hydraulic valve arrangement 8, after the contained energy has been largely converted into work in the tamping tools by means of the hydraulic actuators 91, 94, which the tamping picks 96 perform in the ballast bed 12 by their movements, in particular the positioning movement and vibration.

[0120] Figure 4 shows a detailed view of the regulated battery system 1 from Figure 3.

[0121] The battery system 1 is shown with its connection to the container 6A, from which hydraulic medium is pumped, the connection 18 to the hydraulic valve arrangement 8, as well as the connection 17 for transmitting measurement signals to the controller unit 7 and the connection 71 for receiving control signals generated by this controller unit 7.

[0122] In this version, the controller unit 7 comprises three subunits 72, 73 and 74.

[0123] The measurement signals Pv,i; Pv,2; Pv,k received by means of the measurement signal line 17 from the battery system 1 are made available to the storage unit 73, which records and stores the time series of the measurement signals {pv,i; Pv,2; Pv,k .

[0124] The evaluation unit 74 of the controller unit 7 determines by means of sections {p V ,l; Pv,2; Pv,mh, {pv,m+l; Pv,m+2; Pv, 2m} 2 , — dPv n- l) *m+l; Pv, (nl) *m+2; Pv,n*m} n der Me SS 1 gna 1 Z 611 r 6 ihe {p V ,l; Pv,2; 24015

[0125] 19

[0126] Pv, k} from the storage unit 73, which it can access, at least one parameter i, which is necessary for the control of the motor hydraulic pump unit 2 of the battery system 1 .

[0127] The input parameter i is provided to the control signal generation unit 72 of the controller unit 7 by the evaluation unit 74.

[0128] The control signal unit 72 generates control signals, in particular the pilot signal for the motor-hydraulic pump unit 2 of the battery system 1, by means of at least one pilot parameter i determined by the evaluation unit 74 and the current measurement signal value p provided by the storage unit. v , k and / or previous measurement signal values ​​p v , i; Pv, 2; Pv, ki of the same or earlier sections of the measurement time series .

[0129] Alternatively, the control signals of previous work cycles are stored in the storage unit 73, assuming that the control signals of successive work cycles differ only slightly from each other.

[0130] In another implementation form, the stored control signal time series of n work cycles are evaluated according to a statistical procedure in the evaluation unit 74 in order to obtain an adapted control signal time series of a work cycle.

[0131] Thus, the pilot signal is adapted to changing environmental conditions, thereby compensating for deviations in the required hydraulic fluid flow rate, the 24015

[0132] 20 preferably occur during a work cycle, especially during a plugging cycle, and are reduced.

[0133] This higher-level adaptive or self-learning control of the feedforward signal thus relieves the control procedure subordinate to the feedforward control for compensating the deviations.

[0134] The statistical method used is in particular the determination of an arithmetic mean.

[0135] Alternatively, the control signal series are weighted with different factors and an arithmetic mean is determined from the resulting weighted control signal series.

[0136] The subject matter of the invention disclosed in the claims is not limited to the described exemplary embodiments.

[0137] These include, in particular, different versions of the motor-hydraulic pump unit 2, the measured value acquisition unit 4, different architectures of the controller unit 1, and others.

[0138] The design forms of the at least one stuffing unit are included according to the claims.

Claims

21 Patent claims 1. Battery system (1) for at least one filling unit (9) comprising a motor-hydraulic pump unit (2), a hydraulic accumulator (3) and measuring units (4), arranged to provide hydraulic medium with a hydraulic supply pressure (p v) for hydraulic actuators (94) of the stuffing unit (9), wherein the motor-hydraulic pump unit (2) enables a change in the flow rate of hydraulic medium to the hydraulic actuators (91, 94), wherein a control unit (7) for controlling the flow rate is connected to an actuating unit (225) of the motor-hydraulic pump unit (2), and signal lines (24, 17) of the measuring units (4) are connected to inputs of the control unit (7), characterized in that an output of the control unit (7) for pilot control is connected to an input of the actuating unit (225) of the motor-hydraulic pump unit (2) and for storing and evaluating an operating requirement of hydraulic supply pressure (p) detected with the aid of the measuring units (4). v) and / or volume flow of the hydraulic medium of the plugging unit (9) a storage unit (73) and an evaluation unit (74) are arranged and the control unit (7, 72) is further equipped to detect deviations from the volume flow of the hydraulic medium and / or the hydraulic supply pressure (p) predicted by the evaluation unit v to compensate.

2. Battery system (1) according to claim 1, characterized in that the hydraulic pump (221) of the adjustable motor hydraulic pump unit (2) is a hydraulic pump with constant displacement volume. 22 3. Battery system (1) according to claim 1, characterized in that the hydraulic pump (221) of the adjustable motor hydraulic pump unit (2) is a hydraulic pump with variable displacement volume.

4. Battery system (1) according to claim 3, characterized in that the motor (21) of the adjustable motor-hydraulic pump unit (2) is a constant speed motor.

5. Battery system (1) according to one of claims 1 to 3, characterized in that the motor (21) of the adjustable motor-hydraulic pump unit (2) is a variable speed motor.

6. Battery system (1) according to one of claims 1 to 5, characterized in that at least one further hydraulic pump (221) and / or one further motor-hydraulic pump unit (2) can be switched on by means of the controller unit (7).

7. Battery system (1) according to one of claims 1 to 6, characterized in that at least one further hydraulic accumulator (3) can be switched on by means of the control unit (7).

8. Battery system (1) according to one of claims 1 to 7, characterized in that at least one hydraulic valve is arranged in a hydraulic pressure line (28) and is connected to a control output of the controller unit for control by means of the controller unit (7). 23 9. Battery system (1) according to claim 8, characterized in that the at least one hydraulic valve is a proportional valve.

10. Battery system (1) according to one of claims 1 to 9, characterized in that the hydraulic supply pressure (p) is determined by v ) of the hydraulic medium at the outlet of the motor hydraulic pump unit (2) a measuring unit (4) with a pressure sensor is arranged.

11. Battery system (1) according to one of claims 1 to 9, characterized in that a measuring unit (4) with hydraulic feedback is arranged at the outlet of the motor-hydraulic pump unit (2) to determine the volume flow of the hydraulic medium.

12. Method for providing hydraulic fluid with a hydraulic supply pressure (p v ) for hydraulic actuators (91, 94) of a stuffing unit (9) by means of a battery system (1) according to one of claims 1 to 11 characterized by - continuous or continuously discrete determination of a measured value p v ,k of the hydraulic supply pressure (p v ) and / or a measured value of the volume flow rate of the hydraulic medium using the measuring unit (4) , - continuous or continuously discrete transmission of the determined measured value p v ,k to the deposit unit (73) , - Determination of at least one parameter (i, T) necessary for the pilot control of the motor-hydraulic pump unit (2) from at least one section of a measured value time series {pv,i; Pv,2; Pv, k} n of the storage unit (73) stored measured values ​​Pv,i; Pv,2; Pv,k using the evaluation unit (74) , - Generation of a current feedforward signal using the current measured value p v ,k of the hydraulic supply pressure (p v ) and / or the at least one necessary input parameter i, T and / or a previous measured value p v ,kj and / or a measured value { pv, k-±*m} ni at least one previous work cycle using the controller unit (7, 72) , - Output of the current pilot signal from the controller unit (7, 72) to the actuating unit (225) of the motor hydraulic pump unit (2) .

13. Method according to claim 12 characterized by - Activation of at least one hydraulic pump (221) and / or at least one motor-hydraulic pump unit (2) and / or at least one hydraulic accumulator (3) by means of the current pilot control signal of the controller unit (7) .

14. Method according to claim 12 or 13 characterized by - Control of at least one hydraulic valve by means of the current pilot signal of the controller unit (7) .

Images