EP3931450A1 - Hydraulic drive system - Google Patents
Hydraulic drive systemInfo
- Publication number
- EP3931450A1 EP3931450A1 EP20726736.0A EP20726736A EP3931450A1 EP 3931450 A1 EP3931450 A1 EP 3931450A1 EP 20726736 A EP20726736 A EP 20726736A EP 3931450 A1 EP3931450 A1 EP 3931450A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- feed line
- drive system
- individual units
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 230000000903 blocking effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- IHQKEDIOMGYHEB-UHFFFAOYSA-M sodium dimethylarsinate Chemical class [Na+].C[As](C)([O-])=O IHQKEDIOMGYHEB-UHFFFAOYSA-M 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/26—Supply reservoir or sump assemblies
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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
- F15B11/02—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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
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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
- 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
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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
- 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
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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
- 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 systems 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.
- DE 10 2014 009 996 A1 shows a valve system in which, in the manner of a construction kit for the supply of consumers, such as hydraulic actuators, module-like blocks are connected to one another in a fluid-carrying manner, the hydraulic components such as valves, pressure compensators, orifice inserts and comparable other fluid-influencing valve components. From WO 2013/059033 A1 a hydraulic drive system is known with several hydraulic consumers in the form of hydraulic work 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 with a closed designed, hydraulic supply circuit connected fluidly, which has a common feed line as a component, into which further valves with blocking function are connected, with individual hydraulic pumps from the closed circuit running guide remove working fluid and into the common feed line for supplying each connected consumer via the downstream valve device.
- the valves or shut-off 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 closed circulation within the scope of the fluid supply is specially designed for a supply task, so that the associated supply circuit with the various hydraulic pumps and the valves must be specifically adapted for each application of a hydraulic supply.
- the invention is based on the object of providing a hydraulic drive system for hydraulic consumers that can be adapted to the respective application in a simple and cost-effective manner.
- a corresponding problem is achieved by a hydraulic drive system with the features of claim 1 in its entirety.
- a hydraulic drive system consisting of at least 2 individual units, each of which has a hydraulic pump which can be actuated by means of a drive and which feeds pressurized fluid on the output side into a common feed line to which at least one valve device is connected to each individual unit, whereby, by means of 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. are connected, which are modularly designed in a row to form a longitudinal linkage with each other and each have a section of the feed line that are connected to each other at separable fluid connection points between the adjacently arranged individual units, which form the feed line.
- a modular drive system is created, best starting from several individual units, which are preferably designed the same and which can be coupled with each other in a re-solving manner depending on the number of hydraulic consumers or the performance requirements within the drive system.
- a longitudinal linkage with a large number of individual units required in terms of performance can be created, adapted to the supply task in almost any way, which has no equivalent in the prior art.
- an individual drive unit of the drive system can also be used for a special supply task.
- the invention further enables the fact that the hydraulic pump of each modular single unit feeds into the common feed line, a substantial downsizing of the respective drives and hydraulic pumps.
- the nominal power of the three drives and pumps only need to correspond to one third of the maximum total power requirement of the individual units.
- they also work in the energy-efficient working range for smaller volume flows required by the respective valve devices from the feed line.
- the actuation of the valves connecting the individual units with the feed line enables rapid transitions of the actuation type of the actuators to be supplied, such as their operation in rapid or creep speed, by switching on or off.
- one of the individual units can be provided for the operation of actuators with creep speed and be provided with a motor control for this purpose, which enables fine adjustment of small volume flows for creep speed drive, while the connection of further or al ler individual units covers high performance requirements.
- Another advantage is that if several drive-pump units are present, redundancy is available in the event of a drive or pump failure. Overall, a single unit supply concept that is longitudinally linked to one another is created, which is particularly cost-effective to implement due to the repeatability of the modules.
- a single unit consists at least of the hydraulic pump with its drive, the valve device with utility 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 safeguarded via a pressure relief valve towards the tank, with a common tank being provided for the individual units.
- the individual units can be constructed identically with particular advantage.
- 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 can be provided which is brushless or with brushes verses hen.
- a frequency converter can advantageously be provided for regulation.
- the respective valve can be a shut-off or switching valve, in particular in the form of an electromagnetically operated 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 inlet side to the feed line and a return and on the outlet side to mutually hydraulically releasable 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 pressure loss.
- the fluid-leading connection of the individual units to one another via the feed line can particularly advantageously form a type of longitudinal linkage for the hydraulic pumps.
- 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, they provide high performance when all individual units are switched on.
- the system according to the invention can thereby be used with advantage in working equipment, such as mobile equipment, with the formation of a modular system adapted to the respective application conditions, in which several actuators with different power requirements and with different working speeds, such as rapid or creep speed, are to be provided.
- individual, mutually connectable function blocks in the form of individual modules are provided for realizing the longitudinal linkage, each of which accommodates a valve device and has the hydraulic pump on one side and its drive on the other.
- a modular construction kit system can be implemented in a particularly advantageous manner with such function blocks.
- the individual units of such a longitudinal linkage can also be operated separately from one another as individual modules.
- Fig. 1 is a perspective oblique view of the embodiment of the hydraulic drive system according to the invention, seen hen on the side having electric motor drives;
- FIG. 2 shows a perspective oblique view of the exemplary embodiment, seen on the side having hydraulic pumps;
- FIG. 3 has three identically designed individual units 2 (FIG. 3), each of which forms 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 with narrower, rectangular side surfaces 10, of which only one is numbered in FIGS. 1 and 2.
- the functions are onsblocks 3, 4, 5 are screwed together so that they form a base plate with no step transitions.
- the broad side 6 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 each of which a hydraulic pump 14 is attached, which is driven by the associated electric motor 12 by the respective function block 3,
- the hydraulic pumps 14 are fixed displacement pumps with a speed-controlled delivery rate.
- a switching valve 1 5, 16 or 1 7 is arranged on the broad side 8 of each function block 3, 4, 5, which are inserted into a feed line 18, which, see FIG. 3, as all functional blocks 3, 4 , 5 common conduit runs continuously between the side surfaces 10, with a fluid connection connecting the conduction sections of the feed line 1 8 being formed on the side surfaces 10 forming the contact surfaces, and with individual fluid connection points 20 adjacent to one another being the fluid connection within the framework of the Realize the entire feed line 1 8.
- the respective section of the feed line 18, which, together with the adjacent sections of the further units 2 results in the total output 18, extends.
- External connection points 20 can be closed with connection plugs (not shown) if they are not used.
- the tank 22 with the ventilation filter 28 can be common to all individual units 2.
- the output side of the hydraulic pumps 14 is protected by a pressure limiting valve 30 and a return line 32 to the tank 22.
- the switching valves 15, 1 6 and 1 7 are each formed by a 2/2-way valve that is electromagnetically is operable and biased in the non-actuated state in the locking division.
- the switching valves 15, 16, 1 7 are inserted into the Einspeiselei device 1 8 so that they connect the respectively connected section of the feed line 18 via the fluid connection 20 with the section of the feed line 1 8 of the following in the chain Connect or disconnect function blocks 3, 4, 5.
- the switching valves 1 5, 1 6, 1 7 are blocked, the sections of the feed line 1 8 running in the function blocks 3, 4 and 5 can only be supplied by one hydraulic pump 14, namely the one in the relevant block 3, 4, 5 Hydraulic pump 14.
- the switching valve 1 5 When the switching valve 1 5 is opened, the function blocks 3 and 4 are interconnected, ie the feed line 18 can be supplied in both line sections of function block 3 and function block 4 from the hydraulic pumps 14 of both blocks 3 and 4, while the feed line 18 in the function block 5 can still only be supplied by the hydraulic pump 14 located in this function block 5. If the switching valve 1 6 is opened, the hydraulic pump 14 of the function block 5 is also switched on, so that as long as switching valve 1 5 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 from the function blocks 4 and 5 remain connected to the section of the Einspeiselei device 1 8 running in them, as long as the switching valve 1 6 remains open.
- the function blocks 3, 4 and 5 each have a valve device 34, by means of their useful connections A and B with the feed line 1 8 or with the return line 32 can be connected.
- the valve devices 34 have a 4/3-way switching valve 36 which can be actuated electromagnetically and whose input-side connections are connected to the feed line 1 8 and the return line 32.
- the output-side connections of the directional switching valve 36 one is via a hydraulically releasable return valve check valve 38 with the useful connection A and the other via a hydraulically releasable check valve 40 with the useful connection B in connection.
- the check valves 38 and 40 which block in the direction of the directional switching valve 36, are connected to one another in such a way that they open due to the supply pressure present at one or the other output connection of the directional switching valve 36.
- the non-return valves 38, 40 thereby form a safety circuit which, if there is no supply pressure, prevents a backflow from the consumers and thus a loss of function that may be dangerous to safety.
- a modular system can be implemented in which, depending on the separation of functional 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.
- various actuators can be operated simultaneously in rapid or creep speed.
- the entire delivery rate of the hydraulic pumps 14 is available by interconnecting all the individual units 2.
- a single unit 2 provided for creep speed operation can advantageously be designed so that its output can be finely adjusted by means of frequency control of the electric motor 12, while further 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019003342.6A DE102019003342A1 (en) | 2019-05-11 | 2019-05-11 | Hydraulic drive system |
PCT/EP2020/063043 WO2020229405A1 (en) | 2019-05-11 | 2020-05-11 | Hydraulic drive system |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3931450A1 true EP3931450A1 (en) | 2022-01-05 |
EP3931450B1 EP3931450B1 (en) | 2023-08-02 |
EP3931450C0 EP3931450C0 (en) | 2023-08-02 |
Family
ID=70775330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20726736.0A Active EP3931450B1 (en) | 2019-05-11 | 2020-05-11 | Hydraulic drive system |
Country Status (3)
Country | Link |
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EP (1) | EP3931450B1 (en) |
DE (1) | DE102019003342A1 (en) |
WO (1) | WO2020229405A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2604609A (en) * | 2021-03-08 | 2022-09-14 | Bamford Excavators Ltd | Hydraulic pump system |
CN114233601B (en) * | 2021-12-17 | 2023-06-13 | 中国船舶重工集团公司第七一五研究所 | Energy-saving hydraulic system applying multi-pump-group redundancy control strategy |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006008107A (en) * | 2004-05-26 | 2006-01-12 | Hitachi Ltd | Fluid pressure control device and its manufacturing method |
DE102011108535A1 (en) * | 2011-07-26 | 2013-01-31 | Airbus Operations Gmbh | Hydraulic motor-pump assembly and hydraulic system for a vehicle |
US20130098013A1 (en) * | 2011-10-21 | 2013-04-25 | Brad A. Edler | Closed-loop system having multi-circuit flow sharing |
KR101534697B1 (en) * | 2013-05-09 | 2015-07-07 | 현대자동차 주식회사 | Oil suppply system |
DE102014009996A1 (en) * | 2014-07-05 | 2016-01-07 | Hydac Fluidtechnik Gmbh | Valve modular system |
DE102015008837A1 (en) * | 2015-07-08 | 2017-01-12 | Hydac Fluidtechnik Gmbh | hydraulic power unit |
DE102015225436A1 (en) * | 2015-12-16 | 2017-06-22 | Robert Bosch Gmbh | Valve block, cylinder, compact axle and compact axle construction kit |
-
2019
- 2019-05-11 DE DE102019003342.6A patent/DE102019003342A1/en active Pending
-
2020
- 2020-05-11 WO PCT/EP2020/063043 patent/WO2020229405A1/en unknown
- 2020-05-11 EP EP20726736.0A patent/EP3931450B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
DE102019003342A1 (en) | 2020-11-12 |
EP3931450B1 (en) | 2023-08-02 |
EP3931450C0 (en) | 2023-08-02 |
WO2020229405A1 (en) | 2020-11-19 |
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