EP2594807A1 - Système hydraulique doté d'au moins une machine d'entraînement, notamment développée comme une pompe - Google Patents

Système hydraulique doté d'au moins une machine d'entraînement, notamment développée comme une pompe Download PDF

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Publication number
EP2594807A1
EP2594807A1 EP11189325.1A EP11189325A EP2594807A1 EP 2594807 A1 EP2594807 A1 EP 2594807A1 EP 11189325 A EP11189325 A EP 11189325A EP 2594807 A1 EP2594807 A1 EP 2594807A1
Authority
EP
European Patent Office
Prior art keywords
switching element
switching
hydraulic system
machine
group
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.)
Withdrawn
Application number
EP11189325.1A
Other languages
German (de)
English (en)
Inventor
Torsten Dr.-Ing. Verkoyen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Palfinger Platforms GmbH
Original Assignee
Palfinger Platforms GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Palfinger Platforms GmbH filed Critical Palfinger Platforms GmbH
Priority to EP11189325.1A priority Critical patent/EP2594807A1/fr
Publication of EP2594807A1 publication Critical patent/EP2594807A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • F15B2211/30585—Assemblies of multiple valves having a single valve 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
    • F15B2211/305—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
    • F15B2211/70—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

Definitions

  • the invention relates to a hydraulic system with at least one, in particular designed as a pump, prime mover, with at least two, in particular a variety of work machines, especially designed as hydraulic cylinders work machines, each work machine on two, depending on the operating state of the machine as inlet or return serving Connections is connected by means of appropriate pressure lines to a drive machine, and arranged in the pressure lines valves for adjusting the respective operating state of each machine.
  • Such hydraulic systems are used for example in aerial work platforms.
  • hydraulic resistance controls are used for lifting and lowering of loads.
  • the volume flow of hydraulic fluid delivered by the drive machine, in particular the pump is conducted via valves to the working machines, for example to the hydraulic cylinders.
  • the speed of a work machine is adjusted via a valve associated with this work machine.
  • the disadvantage here is that each machine is assigned a separate four-way valve, so that a hydraulic system must therefore have a number of working machines corresponding number of four-way valves.
  • the object of the invention is to avoid the aforementioned disadvantages and to provide a hydraulic system having a smaller number of valves for changing the operating conditions of the working machines.
  • This object is achieved in that the working machines of the hydraulic system are combined to at least one group, in particular to several groups, each machine is assigned only a single group and the valves of the respective work machines each group each as a hydraulic switching element with at least two Switching states are formed so that changes in the switching state of the switching element, the operating state of at least one work machine of the corresponding group.
  • each group By grouping the work machines into groups, the number of components for changing the operating state is reduced. Thus, each group only one switching element must be assigned, which changes the operating state of at least one work machine of its associated group.
  • the division into four groups offers.
  • the corresponding machines for lateral extension of the usually four booms or shutting down the supports of the boom are divided into four groups.
  • each support can be confirmed separately.
  • Other machines, such as the cylinders for the lift arm and the Corbarm are then distributed among the four groups that only such machines are grouped together within a group that are not operated simultaneously. Thus, only one switching element is required for the operation of the machines of each group.
  • a group may be assigned, for example, as working machines, the cylinder for a lateral retraction of the boom, the cylinder for the lift arm and the cylinder for the support.
  • the booms are always first deployed, for example, simultaneous actuation of the cylinders for the lift arm or support is never desired.
  • At least one switching element can only be varied between an order and delivery. In such an embodiment, intermediate positions are not possible.
  • Such switching elements are also referred to as digital or as black and white switching elements.
  • the switching element switches discretely, so that thus a continuous transition between the individual switching positions is possible.
  • At least one switching element can have three switching states. Such an embodiment lends itself, for example, to the operation of working machines of aerial work platforms. In one of the three switching states, for example, the hydraulic cylinder is extended, retracted in another switching state and in the third switching state of the hydraulic cylinder is not switched.
  • At least one switching element can be switched by a translational movement between the various switching positions.
  • the switching element is designed in the manner of a slider.
  • At least one switching element can be switched by a rotational movement between the different switching positions.
  • At least one switching element can be switched by a translational and a rotational movement between the different switching positions.
  • the switching element can be held by a spring force in a standard switching state, in particular in an odd number of switching states in its center switching position. If the switching element is designed, for example, as a slide, engages on both sides of the switching element preferably a spring, such as a compression spring, a tension spring or a return spring, which holds the switching element in its standard switching state.
  • a spring such as a compression spring, a tension spring or a return spring
  • the switching element in question may be assigned at least one electrically operating actuating element, in particular a magnet.
  • an actuating element is provided on both sides of the switching element. This control is also sometimes referred to as direct control.
  • At least one hydraulically or pneumatically operating actuating element can be assigned to the relevant switching element for driving at least one switching element.
  • This control is also sometimes referred to as indirect control.
  • Each group can be assigned a separate switching element. If four groups are provided, four switching elements are required in such an embodiment.
  • At least two groups may be assigned a single switching element whose number of switching ranges corresponds to the sum of the switching states of the included groups. If, for example, two groups each having three switching states exist, the switching element in this case has six switching ranges. For example, if each of two groups has only two switching states, a switching element with four switching ranges is required.
  • a proportional valve in particular a four-way valve, can be provided.
  • a proportional valve also allows a steady transition between the switching positions, so that a precise operation is possible.
  • Fig. 1 an embodiment of a hydraulic system according to the invention is shown.
  • the hydraulic system comprises four groups I-IV consisting of three each designed as a hydraulic cylinder working machines 1, the sake of clarity, only the groups I and II are shown.
  • Each group I or II with the working machines 1 is associated with a switching element 2, each with three switching states.
  • all four groups I to IV associated with a common switching element.
  • the number of switching areas corresponds to the sum of the switching states of the groups I-IV included, and is therefore 12.
  • position of the switching element 2 represents the middle switching position.
  • the switching element 2 is held by a spring force.
  • a spring 3 engages at the two opposite ends of the switching element 2.
  • an electrically operating actuator 5 in the form of a magnet.
  • the switching element 2 can be moved translationally in the respective three switching states.
  • a pump is shown, wherein each working machine 1 via two, depending on the operating state of the working machine 1 serving as inlet or return connections by means of a corresponding pressure line 7, 8 is connected.
  • a proportional valve 9 is provided in each case, which is formed in the illustrated embodiment as a four-three-way valve. Each proportional valve 9 can be moved into the three illustrated switching states, wherein four ports are provided in each switching state.
  • each proportional valve 9 is in its center position. In this middle position, the proportional valve 9 is held by two acting on the opposite ends of springs 10. For the displacement of each proportional valve 9, two electrically operating actuators 11 are also provided.
  • the respective hydraulic system comprises a plurality of tanks 12, which serve for the storage of hydraulic fluid.
  • tanks 12 which serve for the storage of hydraulic fluid.
  • a pressure relief valve 13 is provided to prevent excessive pressure build-up.
  • the hydraulic system according to the invention allows the switching of all belonging to a group of machines 1 by a single, this group associated switching element 2. Within each group, only one prime mover 1 can be operated in the illustrated embodiments, ie extended or retracted, be.
  • the switching element 2 is pre-controlled via a hydraulically or pneumatically operating actuating element 14, which act on the switching element 2 from both sides.
  • each group I-IV is assigned a separate switching element 2, which can be moved into the three switching states.
  • each switching element 2 is controlled directly.
  • an electrically operating actuating element 5 engages at each end.
  • Fig. 4 the indirect control is shown. Here engages at each end of the switching element 2, a hydraulically or pneumatically operating actuator 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
EP11189325.1A 2011-11-16 2011-11-16 Système hydraulique doté d'au moins une machine d'entraînement, notamment développée comme une pompe Withdrawn EP2594807A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11189325.1A EP2594807A1 (fr) 2011-11-16 2011-11-16 Système hydraulique doté d'au moins une machine d'entraînement, notamment développée comme une pompe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11189325.1A EP2594807A1 (fr) 2011-11-16 2011-11-16 Système hydraulique doté d'au moins une machine d'entraînement, notamment développée comme une pompe

Publications (1)

Publication Number Publication Date
EP2594807A1 true EP2594807A1 (fr) 2013-05-22

Family

ID=45062949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11189325.1A Withdrawn EP2594807A1 (fr) 2011-11-16 2011-11-16 Système hydraulique doté d'au moins une machine d'entraînement, notamment développée comme une pompe

Country Status (1)

Country Link
EP (1) EP2594807A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019201182A1 (de) * 2019-01-30 2020-07-30 Putzmeister Engineering Gmbh Fahrzeug
CN113048104A (zh) * 2021-04-22 2021-06-29 贵州大学 一种液压负载作业平台能量回收系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512453A (en) * 1968-05-22 1970-05-19 Caterpillar Tractor Co System for actuation of hydraulic motors on tractor powered implements
EP0152628A1 (fr) * 1984-02-18 1985-08-28 Robert Bosch Gmbh Outil pour poser des attaches, en particulier agrafeuse électrique
WO1986006142A1 (fr) * 1985-04-11 1986-10-23 Caterpillar Industrial Inc. Commande d'un systeme actionne par un fluide
DE19633191A1 (de) * 1996-08-17 1998-02-19 Daimler Benz Ag Umschaltventil für ein Druckmedium
US6205780B1 (en) * 1996-01-10 2001-03-27 Aeroquip-Vickers International Gmbh Low-loss drive system for a plurality of hydraulic actuators
US6431050B1 (en) * 2000-06-26 2002-08-13 Caterpillar Inc. Apparatus for multiplexing a plurality of hydraulic cylinders

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512453A (en) * 1968-05-22 1970-05-19 Caterpillar Tractor Co System for actuation of hydraulic motors on tractor powered implements
EP0152628A1 (fr) * 1984-02-18 1985-08-28 Robert Bosch Gmbh Outil pour poser des attaches, en particulier agrafeuse électrique
WO1986006142A1 (fr) * 1985-04-11 1986-10-23 Caterpillar Industrial Inc. Commande d'un systeme actionne par un fluide
US6205780B1 (en) * 1996-01-10 2001-03-27 Aeroquip-Vickers International Gmbh Low-loss drive system for a plurality of hydraulic actuators
DE19633191A1 (de) * 1996-08-17 1998-02-19 Daimler Benz Ag Umschaltventil für ein Druckmedium
US6431050B1 (en) * 2000-06-26 2002-08-13 Caterpillar Inc. Apparatus for multiplexing a plurality of hydraulic cylinders

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019201182A1 (de) * 2019-01-30 2020-07-30 Putzmeister Engineering Gmbh Fahrzeug
WO2020157124A1 (fr) 2019-01-30 2020-08-06 Putzmeister Engineering Gmbh Véhicule
CN113330174A (zh) * 2019-01-30 2021-08-31 普茨迈斯特工程有限公司 车辆
KR20210118439A (ko) * 2019-01-30 2021-09-30 푸츠마이스터 엔지니어링 게엠베하 차량
JP2022519053A (ja) * 2019-01-30 2022-03-18 プツマイスター エンジニアリング ゲーエムベーハー 車両
US20220128069A1 (en) * 2019-01-30 2022-04-28 Putzmeister Engineering Gmbh Vehicle
US11732488B2 (en) 2019-01-30 2023-08-22 Putzmeister Engineering Gmbh Vehicle for a thick matter pump apparatus
CN113330174B (zh) * 2019-01-30 2023-12-08 普茨迈斯特工程有限公司 车辆
CN113048104A (zh) * 2021-04-22 2021-06-29 贵州大学 一种液压负载作业平台能量回收系统
CN113048104B (zh) * 2021-04-22 2022-07-15 贵州大学 一种液压负载作业平台能量回收系统

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