EP3931450B1 - Système d'entraînement hydraulique - Google Patents

Système d'entraînement hydraulique Download PDF

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Publication number
EP3931450B1
EP3931450B1 EP20726736.0A EP20726736A EP3931450B1 EP 3931450 B1 EP3931450 B1 EP 3931450B1 EP 20726736 A EP20726736 A EP 20726736A EP 3931450 B1 EP3931450 B1 EP 3931450B1
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EP
European Patent Office
Prior art keywords
hydraulic
feed line
individual units
drive system
valve
Prior art date
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Active
Application number
EP20726736.0A
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German (de)
English (en)
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EP3931450C0 (fr
EP3931450A1 (fr
Inventor
Andreas Böhler
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Hydac Fluidtechnik GmbH
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Hydac Fluidtechnik GmbH
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Publication of EP3931450A1 publication Critical patent/EP3931450A1/fr
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Publication of EP3931450C0 publication Critical patent/EP3931450C0/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0807—Manifolds
    • F15B13/0817—Multiblock manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0878—Assembly of modular units
    • F15B13/0882—Assembly of modular units using identical modular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0878—Assembly of modular units
    • F15B13/0885—Assembly of modular units using valves combined with other components
    • F15B13/0892—Valves combined with fluid components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/003—Systems with different interchangeable components, e.g. using preassembled kits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/022—Systems essentially incorporating special features for controlling the speed or actuating force of an output member in which a rapid approach stroke is followed by a slower, high-force working stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0832—Modular valves
    • F15B13/0839—Stacked plate type valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • F15B2013/006—Modular components with multiple uses, e.g. kits for either normally-open or normally-closed valves, interchangeable or reprogrammable manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/265—Control of multiple pressure sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/265—Control of multiple pressure sources
    • F15B2211/2658—Control of multiple pressure sources by control of the prime movers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
    • F15B2211/31535—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having multiple pressure sources and a single output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31582—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having multiple pressure sources and a single output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press

Definitions

  • the invention relates to a hydraulic drive system.
  • Hydraulic drive systems are used in technical installations provided with hydraulic systems, in which hydraulic actuation of actuators for control and/or work functions is provided. From the large number of areas of application, for example, use in mobile systems such as cranes or forklifts, or use in motor vehicle lifting platforms should be mentioned.
  • the DE 10 2014 009 996 A1 a valve system in which, in the manner of a kit for the supply of consumers, such as hydraulic actuators, modular blocks are connected to one another in a fluid-carrying manner, which contain hydraulic components such as valves, pressure compensators, orifice inserts and comparable other valve components affecting fluid.
  • WO 2013/059033 A1 is a hydraulic drive system known with several hydraulic consumers in the form of hydraulic working cylinders and hydraulic motors. Each hydraulic consumer is assigned a valve device which is designed as a 4/3-way proportional valve and regulates the hydraulic inlet and outlet to the respective hydraulic consumer. On the input side is the respective Valve device connected to a closed hydraulic supply circuit in a fluid-carrying manner, which has a common feed line as part of it, in which further valves with a blocking function are connected, with individual hydraulic pumps extracting working fluid from the closed circuit and feeding it into the common feed line to supply the respective connected consumer via the so far feed downstream valve device.
  • valves or check valves used in the feed line allow the individual hydraulic pumps used for supply to be decoupled from one another, so that individual consumers can be separated from the closed supply circuit and thus shut down.
  • the well-known hydraulic drive system with a closed circuit as part of the fluid supply is specially designed for a supply task, so that the associated supply circuit with the various hydraulic pumps and valves must be specifically adapted for each application of a hydraulic supply.
  • the EP 1 600 346 A1 describes a hydraulic drive system consisting of at least two individual units, each of which has a hydraulic pump that can be actuated by a drive, which feed pressurized fluid on the output side into a common feed line, to which at least one valve device is assigned, assigned to each individual unit, with a valve in the feed line, two adjacent individual units are separated from one another or connected to one another in a fluid-carrying manner, which are modularly designed in a row and form a longitudinal chain with one another and each have a section of the feed line which is connected to one another at fluid connection points that can be separated from one another between the adjacently arranged individual units, forming the feed line.
  • the object of the invention is to provide a hydraulic drive system for hydraulic consumers that can be adapted to the respective application in a simple and cost-effective manner.
  • a hydraulic drive system consisting of at least 2 individual units, each of which has a hydraulic pump that can be actuated by a drive, which feeds pressurized fluid on the output side into a common feed line, to which at least one valve device, assigned to each individual unit, is assigned for supplying a respective consumer is connected, with two adjacent individual units being separated from one another or connected to one another to carry fluid by means of a valve in the feed line, wherein the at least two individual units are of modular design, form a longitudinal chain with one another and each have a section of the feed line (18), the respective Sections of the feed line (18) are connected to one another by fluid connection points (20) which can be separated from one another between the adjacently arranged individual units (2).
  • the fluid-carrying connection of the individual units to one another via the feed line forms a type of longitudinal linkage for the hydraulic pumps; and that the respective hydraulic consumers, such as actuators in the form of working cylinders or hydraulic motors, can be operated in rapid or creep speed, or if necessary, due to the separable longitudinal linking of the individual units can achieve high performance when all individual units are switched on.
  • a modular drive system is created in this way, consisting of several individual units which are preferably of identical design and which can be coupled to one another in a detachable manner depending on the number of hydraulic consumers or the power requirements within the scope of the drive system.
  • a longitudinal chain with a large number of individual units required in terms of performance can be created in almost any way adapted to the supply task, which has no equivalent in the prior art.
  • a single drive assembly of the drive system can also be used for a special supply task.
  • the system according to the invention can thus be used advantageously in working equipment, such as mobile equipment, in which several actuators with different power requirements and with different working speeds, such as rapid or creep speed, have to be supplied, forming a modular system adapted to the respective application conditions.
  • the invention also enables extensive downsizing of the respective drives and hydraulic pumps because the hydraulic pump of each modular individual unit feeds into the common feed line.
  • the nominal power of the three drives and pumps only has to correspond to one third of the maximum total power requirement of the individual units.
  • these also work in the energy-efficient working range with smaller volume flows requested by the respective valve devices from the feed line.
  • the actuation of the valves connecting the individual units to the feed line enables rapid transitions in the type of actuation of the actuators to be supplied, such as their operation in rapid or creep speed, by switching them on or off.
  • one of the individual units can be provided for the operation of actuators with creep speed and this can be provided with a motor controller that enables fine adjustment of small volumetric flows for creep speed drive, while the connection of other or all individual units covers high performance requirements.
  • a further advantage is that if there are several drive-pump units, redundancy is available in the event of a drive or pump failure. Overall, a longitudinally linked individual unit supply concept is created, which is particularly cost-effective to implement due to the repeatability of the modules.
  • an individual unit consists at least of the hydraulic pump with its drive, the valve device with useful connections for a hydraulic consumer and a section of the feed line together with the associated valve and preferably an associated supply or storage tank.
  • the pressure side of the respective hydraulic pump sucking in from a tank can be secured towards the tank via a pressure-limiting valve, it being possible for a common tank to be provided for the individual units.
  • the individual units can be constructed in the same way.
  • the use of electric motors of the same type also simplifies drive control.
  • a drive controller can be provided for several motors.
  • An alternating current or direct current motor which is brushless or provided with brushes, can be provided as the drive for the respective hydraulic pump.
  • a frequency converter can advantageously be provided for regulation.
  • the respective valve can be a blocking or switching valve, in particular in the form of an electromagnetically actuated 2/2-way switching valve.
  • Directional valves can also be used to control higher volume flows with low flow losses.
  • each valve device is formed from at least one 4/3-way switching valve, which is connected on the input side to the feed line and to a return and on the output side to mutually hydraulically piloted check valves, each of which leads to a useful connection.
  • the respective actuators for example lifting cylinders, are protected against a safety-endangering malfunction in the event of a possible loss of pressure by the hydraulically pilot-operated non-return valves.
  • individual functional blocks that can be connected to one another in the form of individual modules are provided for the realization of the longitudinal linkage, each of which accommodates a valve device and has the hydraulic pump on one side and its drive on the other side.
  • a modular system can be implemented in a particularly advantageous manner with such function blocks.
  • the individual units of such a longitudinal chain can also be operated separately from one another as individual modules.
  • the invention is explained using an exemplary embodiment that has three identically designed individual units 2 ( 3 ), which each form an identically designed function block 3, 4 and 5. These are each a cuboid with two opposite broad sides 6 and 8 with a square outline and narrower, rectangular side surfaces 10, of which 1 and 2 only one is numbered.
  • the function blocks 3, 4, 5 are screwed to one another on adjacent side faces 10, so that together they form a base plate with smooth transitions.
  • the broad side 6 in each case forms the drive side on which an electric motor 12 is mounted with a centrally located drive shaft, in the present example in the form of a brushless AC motor.
  • the opposite broad side 8 forms the pump side, on which a hydraulic pump 14 is fastened in each case, which is driven directly by the associated electric motor 12 with a drive shaft passed through the respective function block 3, 4 and 5.
  • the hydraulic pumps 14 are constant pumps with a speed-controlled delivery rate.
  • a switching valve 15, 16 and 17 is arranged on the broad side 8 of each function block 3, 4, 5, which are inserted into a feed line 18, see 3 , as a line common to all function blocks 3, 4, 5, runs continuously between the side surfaces 10, with a fluid connection connecting the line sections of the feed line 18 being formed on the side surfaces 10 forming the contact surfaces, and with individual, mutually adjacent fluid connection points 20 providing the fluid connection with appropriate sealing produce as part of the realization of the overall feed line 18.
  • Between two connection points 20 of a single unit 2 extends the respective section of the feed line 18, which results in the total output 18 with the adjacently arranged sections of the other units 2.
  • External connection points 20 can be sealed with connection plugs (not shown) if they are not used.
  • the hydraulic pumps 14, which suck in from a tank 22 via a filter 24, are connected with their output side to the feed line 18 via a non-return valve.
  • the tank 22 with ventilation filter 28 can be common to all individual units 2 .
  • the output side of the hydraulic pump 14 is protected via a pressure relief valve 30 and a return line 32 to the tank 22 .
  • the switching valves 15, 16 and 17 are each formed by a 2/2-way valve which can be actuated electromagnetically and is biased into the blocking position in the non-actuated state.
  • the switching valves 15, 16, 17 are inserted into the feed line 18 in such a way that they connect or disconnect the respectively connected section of the feed line 18 via the fluid connection 20 with the section of the feed line 18 of the function block 3, 4, 5 following in the chain .
  • the sections of the feed line 18 running in the function blocks 3, 4 and 5 can only be supplied by one hydraulic pump 14, namely the hydraulic pump 14 located in the block 3, 4, 5 in question of the switching valve 15, the function blocks 3 and 4 are interconnected, i.e.
  • the feed line 18 can be supplied in both line sections of function block 3 and function block 4 by the hydraulic pumps 14 of both blocks 3 and 4, while the feed line 18 in function block 5 continues to be supplied only by the in this function block 5 located hydraulic pump 14 can be supplied. If the switching valve 16 is opened, the hydraulic pump 14 of the function block 5 is also switched on, so that as long as the switching valve 15 is also open, all three hydraulic pumps 14 of the feed line 18 are switched on. When the switching valve 15 is blocked, the hydraulic pumps 14 remain in the function blocks 4 and 5 is switched on to the section of the feed line 18 running in them, as long as the switching valve 16 remains open.
  • the function blocks 3, 4 and 5 each have a valve device 34, by means of which useful connections A and B are connected to the feed line 18 or to the return line 32 are connectable.
  • the valve devices 34 have a 4/3-way switching valve 36 which can be actuated electromagnetically and whose inlet-side connections are connected to the feed line 18 and the return line 32 .
  • One of the outlet-side connections of the directional control valve 36 is connected to the useful port A via a hydraulically pilot-operated check valve 38 and the other is connected to the user port B via a hydraulically pilot-operated check valve 40 .
  • the check valves 38 and 40 which block in the direction of the directional control valve 36, are interconnected in such a way that they open due to the supply pressure present at one or the other output connection of the directional control valve 36.
  • the non-return valves 38, 40 thereby form a safety circuit which, in the event of a lack of supply pressure, prevents a backflow from the consumers and thus a loss of function which may endanger safety.
  • a modular system can be implemented in which, depending on the separation of function blocks 3, 4, 5 from the feed line 18 or the connection to the feed line 18, respective consumers can be supplied and driven in different ways.
  • different actuators can be operated simultaneously in rapid or creep speed.
  • the entire delivery capacity of the hydraulic pumps 14 is available by interconnecting all the individual units 2 .
  • An individual unit 2 provided for creep speed operation can advantageously be finely adjusted in terms of power by means of frequency control of the electric motor 12 be designed while other electric motors 12, for example together, can be operated with less complex control.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (8)

  1. Système hydraulique d'entraînement, constitué d'au moins deux groupes (2) individuels, qui ont chacun une pompe (14) hydraulique pouvant être actionnée au moyen d'un entraînement (12), lesquelles, du côté de la sortie, injectent du fluide sous pression dans un conduit (18) commun d'injection auquel, affecté à chaque groupe (2) individuel, est raccordé au moins un dispositif (34) de soupape pour l'alimentation d'un consommateur respectif, dans lequel, au moyen d'une soupape (15, 16, 17) dans le conduit (18) d'injection, deux groupes (2) individuels voisins sont séparés l'un de l'autre ou sont reliés l'un à l'autre en conduite de fluide, dans lequel les au moins deux groupes individuels sont de constitution de type modulaire, forment entre eux, dans une rangée les uns à côté des autres, un enchaînement longitudinal et ont chacun un tronçon du conduit (18) d'injection, dans lequel les tronçons respectifs du conduit (18) d'injection sont reliés entre eux, entre les groupes (2) individuels voisins, par des points (20) de raccordement de fluide pouvant être séparés les uns des autres,
    dans lequel
    la liaison de conduite de fluide des groupes (2) individuels entre eux, par le conduit (18) d'injection, forment une sorte d'enchaînement longitudinal pour les pompes (14) hydrauliques ; et
    dans lequel,
    par l'enchaînement longitudinal pouvant être séparé des groupes (2) individuels, les consommateurs hydrauliques respectifs, comme des actionneurs sous la forme de vérins de travail ou de moteurs hydrauliques, peuvent fonctionner en mouvement rapide ou en mouvement lent ou, en cas de besoin, en branchant tous les groupes (2) individuels, peuvent donner de grandes puissances.
  2. Système hydraulique d'entraînement suivant la revendication 1, caractérisé en ce qu'un groupe (2) individuel est constitué au moins de
    - la pompe (14) hydraulique avec son entraînement (12) ;
    - le dispositif (34) de soupape ayant des raccords (A, B) utiles pour un consommateur hydraulique ;
    - un tronçon du conduit (18) d'injection ; outre
    - une soupape (15, 16, 17) lui appartenant ; et
    - de préférence un réservoir (22).
  3. Système hydraulique d'entraînement suivant la revendication 1 ou 2, caractérisé en ce que tous les groupes (2) individuels sont de même construction.
  4. Système hydraulique d'entraînement suivant l'une des revendications précédentes, caractérisé en ce que l'entraînement est un moteur (12) à courant alternatif ou à courant continu, qui est sans balai ou avec balai.
  5. Système hydraulique d'entraînement suivant l'une des revendications précédentes, caractérisé en ce que la soupape respective est une soupape de commande, en particulier une soupape (15, 16, 17) de commande à 2/2 voies pouvant être actionnée électromagnétiquement.
  6. Système hydraulique d'entraînement suivant l'une des revendications précédentes, caractérisé en ce que chaque dispositif (34) de soupape est formé d'au moins une soupape (36) de commande à 4/3 voies, qui est raccordée, du côté de l'entrée, au conduit (18) d'injection ainsi qu'à un retour (32) et, du côté de la sortie, à des clapets (38, 40) antiretour pouvant être débloqués mutuellement hydrauliquement, qui conduisent respectivement à un raccord (A ou B) utile.
  7. Système hydraulique d'entraînement suivant l'une des revendications précédentes, caractérisé en ce que, pour la réalisation de l'enchaînement longitudinal, il est prévu divers blocs (3, 4, 5) fonctionnels, qui peuvent être reliés entre eux, qui reçoivent chacun un dispositif (34) de soupape et qui ont, d'un côté, la pompe (14) hydraulique et, de l'autre côté, leur entraînement (12).
  8. Système hydraulique d'entraînement suivant l'une des revendications précédentes, caractérisé en ce que les groupes (2) individuels d'un enchaînement longitudinal peuvent fonctionner séparément les uns des autres et également pour eux-mêmes en module individuel.
EP20726736.0A 2019-05-11 2020-05-11 Système d'entraînement hydraulique Active EP3931450B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019003342.6A DE102019003342A1 (de) 2019-05-11 2019-05-11 Hydraulisches Antriebssystem
PCT/EP2020/063043 WO2020229405A1 (fr) 2019-05-11 2020-05-11 Système d'entraînement hydraulique

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EP3931450A1 EP3931450A1 (fr) 2022-01-05
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GB2604609A (en) * 2021-03-08 2022-09-14 Bamford Excavators Ltd Hydraulic pump system
CN114233601B (zh) * 2021-12-17 2023-06-13 中国船舶重工集团公司第七一五研究所 一种应用多泵组冗余控制策略的节能液压系统

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JP2006008107A (ja) * 2004-05-26 2006-01-12 Hitachi Ltd 液圧制御装置及びその製造方法
DE102011108535A1 (de) * 2011-07-26 2013-01-31 Airbus Operations Gmbh Hydraulische Motor-Pumpen-Anordnung und Hydrauliksystem für ein Fahrzeug
US20130098013A1 (en) * 2011-10-21 2013-04-25 Brad A. Edler Closed-loop system having multi-circuit flow sharing
KR101534697B1 (ko) * 2013-05-09 2015-07-07 현대자동차 주식회사 오일 공급 시스템
DE102014009996A1 (de) * 2014-07-05 2016-01-07 Hydac Fluidtechnik Gmbh Ventil-Baukastensystem
DE102015008837A1 (de) * 2015-07-08 2017-01-12 Hydac Fluidtechnik Gmbh Hydraulikaggregat
DE102015225436A1 (de) * 2015-12-16 2017-06-22 Robert Bosch Gmbh Ventilblock, Zylinder, Kompaktachse und Kompaktachsen-Baukasten

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EP3931450C0 (fr) 2023-08-02
WO2020229405A1 (fr) 2020-11-19
EP3931450A1 (fr) 2022-01-05

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