FR2397548A1 - HYDRAULIC SYSTEM ALLOWING TO COMBINE THE FLOW RATES OF TWO PUMPS - Google Patents

HYDRAULIC SYSTEM ALLOWING TO COMBINE THE FLOW RATES OF TWO PUMPS

Info

Publication number
FR2397548A1
FR2397548A1 FR7819319A FR7819319A FR2397548A1 FR 2397548 A1 FR2397548 A1 FR 2397548A1 FR 7819319 A FR7819319 A FR 7819319A FR 7819319 A FR7819319 A FR 7819319A FR 2397548 A1 FR2397548 A1 FR 2397548A1
Authority
FR
France
Prior art keywords
hydraulic
pump
pumps
flow rates
orifice
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
Application number
FR7819319A
Other languages
French (fr)
Other versions
FR2397548B1 (en
Inventor
James Dominic Rinaldo
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of FR2397548A1 publication Critical patent/FR2397548A1/en
Application granted granted Critical
Publication of FR2397548B1 publication Critical patent/FR2397548B1/fr
Granted 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
    • F15B2211/20538—Type of pump constant 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
    • F15B2211/20—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
    • F15B2211/30—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
    • F15B2211/315—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
    • 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
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/65—Methods of control of the load sensing pressure

Abstract

a. Installation hydraulique permettant de combiner les débits de deux pompes. b. Une valve de commande 19 d'un circuit hydraulique 13 reliant une première pompe 11 à un moteur hydraulique 14 comporte un orifice de signalisation 31 qui communique avec un orifice d'entrée quand ladite valve 19 occupe une position déterminée dans laquelle pratiquement tout le débit de la première pompe 11 est dirigé vers le moteur 14. Un dispositif hydraulique 36 relie la seconde pompe 12 au circuit hydraulique 13 en réponse à un déplacement du tiroir 22 à ladite position déterminée. Le dispositif 36 comporte un organe mobile 39, une chambre 43 à l'une des extrémités de l'organe 39 et des moyens de sollicitation. L'organe 39 peut se déplacer entre une première position dans laquelle la seconde pompe 12 communique avec un réservoir 24, et une seconde position dans laquelle le débit de la seconde pompe 12 s'additionne à celui de la première pompe 11 dans le circuit 13. L'organe mobile 39 est sollicité vers sa première position et ladite chambre 43 est reliée à l'orifice de signalisation 29 de valve de commande 19. c. Concerne, d'une manière générale, les installations hydrauliques et plus particulièrement les installations hydrauliques des engins de terrassement et de travaux publics comportant des organes actionnés par des moteurs hydrauliques.at. Hydraulic installation allowing the flow rates of two pumps to be combined. b. A control valve 19 of a hydraulic circuit 13 connecting a first pump 11 to a hydraulic motor 14 comprises a signaling orifice 31 which communicates with an inlet orifice when said valve 19 occupies a determined position in which practically all the flow of the first pump 11 is directed towards the motor 14. A hydraulic device 36 connects the second pump 12 to the hydraulic circuit 13 in response to a movement of the spool 22 to said determined position. The device 36 comprises a movable member 39, a chamber 43 at one end of the member 39 and biasing means. The member 39 can move between a first position in which the second pump 12 communicates with a reservoir 24, and a second position in which the flow rate of the second pump 12 is added to that of the first pump 11 in the circuit 13 The movable member 39 is biased towards its first position and said chamber 43 is connected to the signaling orifice 29 of the control valve 19. c. In general, relates to hydraulic installations and more particularly to hydraulic installations of earthmoving and public works machinery comprising members actuated by hydraulic motors.

FR7819319A 1977-07-11 1978-06-28 HYDRAULIC SYSTEM ALLOWING TO COMBINE THE FLOW RATES OF TWO PUMPS Granted FR2397548A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81426077A 1977-07-11 1977-07-11

Publications (2)

Publication Number Publication Date
FR2397548A1 true FR2397548A1 (en) 1979-02-09
FR2397548B1 FR2397548B1 (en) 1984-06-29

Family

ID=25214565

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7819319A Granted FR2397548A1 (en) 1977-07-11 1978-06-28 HYDRAULIC SYSTEM ALLOWING TO COMBINE THE FLOW RATES OF TWO PUMPS

Country Status (5)

Country Link
JP (1) JPS5419071A (en)
CA (1) CA1085267A (en)
DE (1) DE2829551A1 (en)
FR (1) FR2397548A1 (en)
GB (1) GB1566385A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509392A1 (en) * 1981-07-08 1983-01-14 Toshiba Machine Co Ltd HYDRAULIC DISTRIBUTION CENTER FOR VEHICLE, SUCH AS ARTICULATED EXCAVATOR LOADER

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3210759A1 (en) * 1981-09-17 1983-10-06 Walter Schopf Pump combination with flow control device
JPS6039343U (en) * 1983-08-22 1985-03-19 海野　治男 Sorting and crushing equipment for demolished concrete
DE3608469A1 (en) * 1986-03-14 1987-10-01 Bosch Gmbh Robert HYDRAULIC SYSTEM
DE3611973C2 (en) * 1986-04-09 1994-04-14 Rexroth Mannesmann Gmbh Shunt valve
DE19640103C2 (en) * 1996-09-28 2000-12-07 Danfoss Fluid Power As Nordbor control valve
CN109372814B (en) * 2018-12-15 2023-09-19 浙江海宏液压科技股份有限公司 Converging lifting load sensitive multi-way valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728194A (en) * 1954-03-29 1955-12-27 Vickers Inc Control circuit for hydraulic power transmission
FR2246759A1 (en) * 1973-10-01 1975-05-02 Sargent Industries
US4002027A (en) * 1973-10-01 1977-01-11 Tyrone Hydraulics, Inc. Multiple pump control system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728194A (en) * 1954-03-29 1955-12-27 Vickers Inc Control circuit for hydraulic power transmission
FR2246759A1 (en) * 1973-10-01 1975-05-02 Sargent Industries
US4002027A (en) * 1973-10-01 1977-01-11 Tyrone Hydraulics, Inc. Multiple pump control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509392A1 (en) * 1981-07-08 1983-01-14 Toshiba Machine Co Ltd HYDRAULIC DISTRIBUTION CENTER FOR VEHICLE, SUCH AS ARTICULATED EXCAVATOR LOADER

Also Published As

Publication number Publication date
DE2829551A1 (en) 1979-01-25
CA1085267A (en) 1980-09-09
GB1566385A (en) 1980-04-30
JPS5419071A (en) 1979-02-13
FR2397548B1 (en) 1984-06-29

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Legal Events

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ST Notification of lapse