WO2012129042A1 - Circuit de régénération - Google Patents

Circuit de régénération Download PDF

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Publication number
WO2012129042A1
WO2012129042A1 PCT/US2012/029190 US2012029190W WO2012129042A1 WO 2012129042 A1 WO2012129042 A1 WO 2012129042A1 US 2012029190 W US2012029190 W US 2012029190W WO 2012129042 A1 WO2012129042 A1 WO 2012129042A1
Authority
WO
WIPO (PCT)
Prior art keywords
hydraulic
cylinder
valves
valve
control 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.)
Ceased
Application number
PCT/US2012/029190
Other languages
English (en)
Inventor
Amir Shenouda
Gerd Scheffel
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.)
Parker Hannifin Corp
Original Assignee
Parker Hannifin Corp
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 Parker Hannifin Corp filed Critical Parker Hannifin Corp
Publication of WO2012129042A1 publication Critical patent/WO2012129042A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • 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
    • F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
    • 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
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • 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
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0243—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits the regenerative circuit being activated or deactivated automatically
    • 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
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
    • 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
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3058—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having additional valves for interconnecting the fluid chambers of a double-acting actuator, e.g. for regeneration mode or for floating mode
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Definitions

  • Hydraulic cylinders are subjected to varying loads during motion.
  • the loads can be resistive loads or overrunning loads.
  • the cylinder is subjected to overrunning loads when that load acts in the same direction of motion, such as lowering a wheel loader boom or lowering an excavator boom or its arm with gravity assistance.
  • Hydraulic cylinders can be subjected to both types of loads in the same extend or retract stroke. For example, when a wheel loader bucket is fully curled in (cylinder fully extended) and is given a curl out (retract) command motion could start with a resistive load and then at some point in the stroke the load turns into a gravity assisted overrunning load. The bucket cylinder in this case is said to have gone over-center. This load transition from resistive to overrunning or vice versa should not affect the speed of the actuator and should be seamless to the machine operator. Controlling overrunning loads using traditional spool valves has not been energy efficient.
  • Regeneration mode also has the advantage of higher speeds than a standard (powered) mode albeit at smaller loads or negative (overrunning) loads.
  • five valves are used to achieve regeneration when the individual valves are not bi-directional. The fifth valve connects both chambers of the cylinder to perform regeneration.
  • At least one embodiment of the invention provides a hydraulic circuit comprising: an hydraulic cylinder having a cylinder rod end and a cylinder base end, a hydraulic fluid inlet in the cylinder base end, and a hydraulic fluid outlet in the cylinder rod end; a hydraulic pump; a hydraulic reservoir; a first valve selectively connecting in fluid communication the hydraulic pump and the hydraulic fluid inlet in the cylinder base end during extension of the cylinder rod; a second control valve selectively opening a fluid passageway connected to the hydraulic fluid outlet in the cylinder rod end of the hydraulic cylinder during extension of the cylinder rod; a third valve selectively opening to connect in fluid communication an outlet of the second control valve to a hydraulic fluid reservoir when the rod is subjected to a resistive load and alternatively closing to force flow from the outlet of the second control valve to pass through a one-way check valve to flow to the hydraulic fluid inlet at the head end of the hydraulic cylinder when the rod is subjected to a resistive load.
  • At least one embodiment of the invention provides a hydraulic circuit comprising: an hydraulic cylinder having a cylinder rod end and a cylinder base end, a hydraulic fluid inlet in the cylinder base end, and a hydraulic fluid outlet in the cylinder rod end; a hydraulic pump; a hydraulic reservoir; a first control valve selectively connecting in fluid communication the hydraulic pump and the hydraulic fluid inlet in the cylinder base end during extension of the cylinder rod; a second control valve selectively opening a fluid passageway connected to the hydraulic fluid outlet in the cylinder rod end of the hydraulic cylinder during extension of the cylinder rod; a third valve selectively connecting in fluid communication an outlet of the second control valve to a hydraulic fluid reservoir when the rod is subjected to a resistive load and alternatively connecting the outlet of the second control valve to the hydraulic fluid inlet at the head end of the hydraulic cylinder through a check valve when the rod is subjected to a resistive load; a fourth control valve selectively connecting in fluid communication the hydraulic pump and a hydraulic fluid inlet in the cylinder rod end of
  • At least one embodiment of the invention provides a method of extending a cylinder rod of a power cylinder comprising the steps of: activating a first control valve to fluidly connect an outlet of a hydraulic pump to an inlet port of a cylinder base end of the power cylinder allowing hydraulic fluid into the power cylinder; simultaneously activating a second control valve to connect an outlet port on a rod side of the power cylinder to allow flow through the second control valve; activating the third valve when the power cylinder is subjected to a resistive load allowing flow from the second control valve through the third valve to drain to a fluid reservoir; closing the third valve when the power cylinder is subjected to an overrunning load causing flow from the second control valve to flow through a one-way check valve to the inlet port of the cylinder base end of the power cylinder.
  • FIG. 1 is a schematic of prior art cylinder system having five valves to control the cylinder motion
  • FIG. 3 is a schematic of a portion of the prior art cylinder components for extension in regeneration mode
  • FIG. 4 is a schematic of a portion of an embodiment of a cylinder system including a regeneration circuit of the present invention providing both power mode and regeneration mode;
  • FIG. 5 is a schematic of an embodiment of a cylinder system including the extension components of the circuit shown in FIG. 4 as well as the circuit for retraction of the cylinder rod.
  • the control valve 25 is connected to node 's' through conduit 15 and is connected to head side 17 of cylinder 1 1 through conduit 16.
  • control valve 25 controls fluid from pump 12 through supply line 14 and conduit 15 to the head side 17 of the cylinder 1 1 .
  • the control valve 27 is connected to the rod side 18 of cylinder 1 1 through conduit 19 and is connected to node 't' through conduit 21 .
  • control valve 27 controls fluid drained from rod side 18 of cylinder 1 1 through conduit 19 to tank 13 through conduits 21 and 22.
  • hydraulic fluid flows from pump 12 through conduits 14 and 15 and is modulated through control valve 25, then through conduit 16 to head side 17 of cylinder 1 1 .
  • Flow is drained from rod side 18 through conduit 23 and is modulated through control valve 29 then through conduits 20 and 24 to head side 17 of cylinder 1 1 to augment flow from pump 12 that is modulated through valve 25. This is required because the volume of flow drained from the rod side 18 is less than the volume required at head side 17 for the cylinder to extend. This is called regeneration mode.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

La présente invention se rapporte à un circuit hydraulique et à un procédé permettant de prolonger une tige cylindrique d'un vérin de commande (11), une soupape (25) associée à un orifice d'entrée (16) d'une extrémité de base de vérin et une soupape (27) associée à un orifice de sortie (17) sur un côté tige (18) étant ouvertes à la fois pendant une charge résistive et un dépassement des charges. Un circuit de régénération est activé par une troisième soupape (30) qui bloque l'écoulement allant de la deuxième soupape jusqu'à un réservoir de fluide (13) et le force à s'écouler à travers un clapet anti-retour unidirectionnel (31) jusqu'à l'orifice d'entrée (33) de l'extrémité de base du vérin de commande.
PCT/US2012/029190 2011-03-18 2012-03-15 Circuit de régénération Ceased WO2012129042A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161454180P 2011-03-18 2011-03-18
US61/454,180 2011-03-18

Publications (1)

Publication Number Publication Date
WO2012129042A1 true WO2012129042A1 (fr) 2012-09-27

Family

ID=45937574

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/029190 Ceased WO2012129042A1 (fr) 2011-03-18 2012-03-15 Circuit de régénération

Country Status (1)

Country Link
WO (1) WO2012129042A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015108817A1 (fr) * 2014-01-15 2015-07-23 Caterpillar Inc. Régénération d'écoulement d'excavation pour vérin de flèche
JP2016169571A (ja) * 2015-03-13 2016-09-23 住友重機械工業株式会社 ショベル
CN106232907A (zh) * 2014-04-29 2016-12-14 沃尔沃建造设备有限公司 用于工程机械的流量控制阀
JP2019044582A (ja) * 2018-12-25 2019-03-22 住友重機械工業株式会社 ショベル
WO2020006538A1 (fr) * 2018-06-29 2020-01-02 Eaton Intelligent Power Limited Système et dispositif d'anticipation et de correction de transitions sur-centrales dans une machine hydraulique mobile
EP3786460A1 (fr) * 2019-08-08 2021-03-03 SMC Deutschland GmbH Dispositif de recirculation de fluide pour un cylindre à double effet et procédé de fonctionnement d'un tel cylindre
US11378989B2 (en) 2016-11-22 2022-07-05 Parker-Hannifin Corporation Hydraulic valve with switching regeneration circuit
US12297623B2 (en) 2022-12-06 2025-05-13 Cnh Industrial America Llc System and method for controlling load dependent valve flow with an overruning load

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0312004U (fr) * 1989-06-15 1991-02-07
WO2011009527A1 (fr) * 2009-07-21 2011-01-27 Parker Hannifin Gmbh Circuits hydrauliques de commande de vérin hydraulique à double effet par vanne de commande 5 points

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0312004U (fr) * 1989-06-15 1991-02-07
WO2011009527A1 (fr) * 2009-07-21 2011-01-27 Parker Hannifin Gmbh Circuits hydrauliques de commande de vérin hydraulique à double effet par vanne de commande 5 points

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SCHEFFEL G: "Energieeffizienz in der Hydraulik", O + P OLHYDRAULIK UND PNEUMATIK, VEREINIGTE FACHVERLAGE, MAINZ, DE, vol. 53, no. 6, 1 June 2009 (2009-06-01), pages 258 - 260, XP001545697, ISSN: 0341-2660 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015108817A1 (fr) * 2014-01-15 2015-07-23 Caterpillar Inc. Régénération d'écoulement d'excavation pour vérin de flèche
US9261118B2 (en) 2014-01-15 2016-02-16 Caterpillar Inc. Boom cylinder dig flow regeneration
CN106232907A (zh) * 2014-04-29 2016-12-14 沃尔沃建造设备有限公司 用于工程机械的流量控制阀
US10047769B2 (en) 2014-04-29 2018-08-14 Volvo Construction Equipment Ab Flow control valve for construction equipment
CN106232907B (zh) * 2014-04-29 2018-11-02 沃尔沃建造设备有限公司 用于工程机械的流量控制阀
JP2016169571A (ja) * 2015-03-13 2016-09-23 住友重機械工業株式会社 ショベル
US11378989B2 (en) 2016-11-22 2022-07-05 Parker-Hannifin Corporation Hydraulic valve with switching regeneration circuit
WO2020006538A1 (fr) * 2018-06-29 2020-01-02 Eaton Intelligent Power Limited Système et dispositif d'anticipation et de correction de transitions sur-centrales dans une machine hydraulique mobile
US11384510B2 (en) 2018-06-29 2022-07-12 Danfoss Power Solutions Ii Technology A/S System and device for anticipating and correcting for over-center transitions in mobile hydraulic machine
US11795659B2 (en) 2018-06-29 2023-10-24 Danfoss A/S System and device for anticipating and correcting for over-center transitions in mobile hydraulic machine
JP2019044582A (ja) * 2018-12-25 2019-03-22 住友重機械工業株式会社 ショベル
EP3786460A1 (fr) * 2019-08-08 2021-03-03 SMC Deutschland GmbH Dispositif de recirculation de fluide pour un cylindre à double effet et procédé de fonctionnement d'un tel cylindre
US11674531B2 (en) 2019-08-08 2023-06-13 SMC Deutschland GmbH Fluid return apparatus for a double-acting cylinder and method for operating such a cylinder
US12297623B2 (en) 2022-12-06 2025-05-13 Cnh Industrial America Llc System and method for controlling load dependent valve flow with an overruning load

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