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FR2645600B2 - CONTROL CIRCUIT FOR A HYDRAULIC LIFTER OPERATED BY A VARIABLE FLOW PUMP - Google Patents
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FR2645600B2 - CONTROL CIRCUIT FOR A HYDRAULIC LIFTER OPERATED BY A VARIABLE FLOW PUMP - Google Patents

CONTROL CIRCUIT FOR A HYDRAULIC LIFTER OPERATED BY A VARIABLE FLOW PUMP

Info

Publication number
FR2645600B2
FR2645600B2 FR9004304A FR9004304A FR2645600B2 FR 2645600 B2 FR2645600 B2 FR 2645600B2 FR 9004304 A FR9004304 A FR 9004304A FR 9004304 A FR9004304 A FR 9004304A FR 2645600 B2 FR2645600 B2 FR 2645600B2
Authority
FR
France
Prior art keywords
control circuit
flow pump
variable flow
hydraulic lifter
lifter operated
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.)
Expired - Lifetime
Application number
FR9004304A
Other languages
French (fr)
Other versions
FR2645600A2 (en
Inventor
Wolfgang Kauss
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.)
Bosch Rexroth AG
Original Assignee
Mannesmann Rexroth AG
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
Priority claimed from DE19873733679 external-priority patent/DE3733679A1/en
Application filed by Mannesmann Rexroth AG filed Critical Mannesmann Rexroth AG
Publication of FR2645600A2 publication Critical patent/FR2645600A2/en
Application granted granted Critical
Publication of FR2645600B2 publication Critical patent/FR2645600B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
    • F15B11/055—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive by adjusting the pump output or bypass
    • 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
    • F15B11/003—Systems with load-holding 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. 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
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
FR9004304A 1987-10-05 1990-04-04 CONTROL CIRCUIT FOR A HYDRAULIC LIFTER OPERATED BY A VARIABLE FLOW PUMP Expired - Lifetime FR2645600B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873733679 DE3733679A1 (en) 1987-10-05 1987-10-05 CONTROL CIRCUIT FOR A HYDRAULIC POWER LIFT OPERATED WITH A PUMP
DE19893911022 DE3911022A1 (en) 1987-10-05 1989-04-05 Control circuit for a hydraulic power lift operated with a variable-displacement pump

Publications (2)

Publication Number Publication Date
FR2645600A2 FR2645600A2 (en) 1990-10-12
FR2645600B2 true FR2645600B2 (en) 1991-10-04

Family

ID=25860510

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9004304A Expired - Lifetime FR2645600B2 (en) 1987-10-05 1990-04-04 CONTROL CIRCUIT FOR A HYDRAULIC LIFTER OPERATED BY A VARIABLE FLOW PUMP

Country Status (2)

Country Link
DE (1) DE3911022A1 (en)
FR (1) FR2645600B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3929466A1 (en) * 1989-09-05 1991-03-21 Rexroth Mannesmann Gmbh CONTROL CIRCUIT FOR A HYDRAULIC POWER LIFT OPERATED WITH A PUMP
DE19528981C1 (en) * 1995-08-07 1996-10-02 Heilmeier & Weinlein Method for controlling double-sided activatable hydraulic cylinder with differential piston connected to two work conduits

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754400A (en) * 1972-04-20 1973-08-28 Deere & Co Variable pressure hydraulic system
US4184334A (en) * 1978-09-11 1980-01-22 International Harvester Company Closed center draft control valve
DE3025949A1 (en) * 1980-07-09 1982-02-04 Robert Bosch Gmbh, 7000 Stuttgart CONTROL DEVICE FOR A HYDRAULIC WORKING MACHINE
DE3415923A1 (en) * 1984-04-28 1985-11-07 Robert Bosch Gmbh, 7000 Stuttgart Directional control valve
DE3733679A1 (en) * 1987-10-05 1989-04-13 Rexroth Mannesmann Gmbh CONTROL CIRCUIT FOR A HYDRAULIC POWER LIFT OPERATED WITH A PUMP

Also Published As

Publication number Publication date
FR2645600A2 (en) 1990-10-12
DE3911022A1 (en) 1990-10-11

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