FR2371614A1 - Hydrostatic power transmission for adjustable volume pumps - incorporates automatic load compensation impulse to adjust drive motor speed - Google Patents

Hydrostatic power transmission for adjustable volume pumps - incorporates automatic load compensation impulse to adjust drive motor speed

Info

Publication number
FR2371614A1
FR2371614A1 FR7734863A FR7734863A FR2371614A1 FR 2371614 A1 FR2371614 A1 FR 2371614A1 FR 7734863 A FR7734863 A FR 7734863A FR 7734863 A FR7734863 A FR 7734863A FR 2371614 A1 FR2371614 A1 FR 2371614A1
Authority
FR
France
Prior art keywords
circuit
power transmission
drive motor
hydraulic
load compensation
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Withdrawn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
FR7734863A
Other languages
French (fr)
Inventor
Esko Kosonen
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.)
Repola Oy
Original Assignee
Rauma Repola Oy
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 Rauma Repola Oy filed Critical Rauma Repola Oy
Publication of FR2371614A1 publication Critical patent/FR2371614A1/en
Withdrawn legal-status Critical Current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
    • F15B11/16—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
    • 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
    • F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
    • 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
    • F15B2211/275—Control of the prime mover, e.g. hydraulic control
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a 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
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6052—Load sensing circuits having valve means between output member and the load sensing circuit using 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
    • F15B2211/70—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

The hydrostatic power transmission provides load compensation and has an I.C. drive motor for hydraulic pumps of adjustable volume. Each pump is connected to a hydraulic circuit to supply a pressure medium, with hydraulic actuators connected to the circuit. A path valve group controls the medium flow in each circuit to the actuator. Pressure reducing valves in the circuits reduce the max. press. When the load of one or more actuators requires a higher pressure, and/or an increased medium supply, than is present in the circuit concerned, and after the control pressure of the path valve (58) concerned, has reached or exceeded a predetermined value, the valve opens a connection from the conduit of the valve to a power demand conduit (66, 67). This leads to a hydraulic control actuator (65), which activates an adjusting member (64) to change the motor RPM (53). The motor RPM is adjusted dependant upon the circuit, in which the highest RPM for the pumps (54, 55) is required.
FR7734863A 1976-11-19 1977-11-21 Hydrostatic power transmission for adjustable volume pumps - incorporates automatic load compensation impulse to adjust drive motor speed Withdrawn FR2371614A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI763330A FI54018C (en) 1976-11-19 1976-11-19 BELASTNINGSKOMPENSERAD HYDROSTATISK EFFEKTTRANSMISSIONSANORDNING

Publications (1)

Publication Number Publication Date
FR2371614A1 true FR2371614A1 (en) 1978-06-16

Family

ID=8510430

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7734863A Withdrawn FR2371614A1 (en) 1976-11-19 1977-11-21 Hydrostatic power transmission for adjustable volume pumps - incorporates automatic load compensation impulse to adjust drive motor speed

Country Status (4)

Country Link
DE (1) DE2751663A1 (en)
FI (1) FI54018C (en)
FR (1) FR2371614A1 (en)
SE (1) SE415390B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400935A (en) * 1980-01-28 1983-08-30 Sundstrand Corporation Engine speed control
US4864994A (en) * 1981-11-16 1989-09-12 Sundstrand Corporation Engine override controls
US4523431A (en) * 1984-02-16 1985-06-18 Caterpillar Tractor Co. Load responsive system
DE3620163A1 (en) * 1986-06-14 1987-12-17 Sauer Getriebe Ag Method for the control or adjustment of a hydrostatic drive by way of the front wheels of a vehicle with mechanical, hydrodynamic or hydrostatic transmission and piston internal combustion engine as rear drive and arrangement for performing the method
US5038563A (en) * 1990-08-07 1991-08-13 The United States Of America As Represented By The Secretary Of The Navy Seawater power source for seawater powered tools
DE19646069A1 (en) * 1996-11-08 1998-05-14 Zahnradfabrik Friedrichshafen Method for operating a drive unit for motor vehicles
FI20030115A (en) 2003-01-24 2004-07-25 Sandvik Tamrock Oy Hydraulic system for quarrying equipment and method for adjusting rock drill power

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166891A (en) * 1963-07-08 1965-01-26 New York Air Brake Co Hydrostatic transmission
FR2241007A1 (en) * 1973-08-13 1975-03-14 Bosch Gmbh Robert

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166891A (en) * 1963-07-08 1965-01-26 New York Air Brake Co Hydrostatic transmission
FR2241007A1 (en) * 1973-08-13 1975-03-14 Bosch Gmbh Robert

Also Published As

Publication number Publication date
DE2751663A1 (en) 1978-05-24
SE7713038L (en) 1978-05-20
FI54018B (en) 1978-05-31
SE415390B (en) 1980-09-29
FI54018C (en) 1978-09-11

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Legal Events

Date Code Title Description
ST Notification of lapse