GB1361861A - Power controlled hydraulic drive systems - Google Patents

Power controlled hydraulic drive systems

Info

Publication number
GB1361861A
GB1361861A GB3626471A GB3626471A GB1361861A GB 1361861 A GB1361861 A GB 1361861A GB 3626471 A GB3626471 A GB 3626471A GB 3626471 A GB3626471 A GB 3626471A GB 1361861 A GB1361861 A GB 1361861A
Authority
GB
United Kingdom
Prior art keywords
pump
delivery
motors
piston
subjected
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
Application number
GB3626471A
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.)
Salzgitter Maschinen AG
Original Assignee
Salzgitter Maschinen 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
Application filed by Salzgitter Maschinen AG filed Critical Salzgitter Maschinen AG
Publication of GB1361861A publication Critical patent/GB1361861A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/472—Automatic regulation in accordance with output requirements for achieving a target output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/007—Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

1361861 Hydraulic control circuits; controlling pumps SALZGITTER MASCHINEN A G 2 Aug 1971 [1 Aug 1970] 36264/71 Headings F1A and F1P In a hydraulic motor control circuit wherein a constant delivery pump 15 supplies through distributing valves 25, 26 double acting motors 28, 29 and a variable delivery pump 17 supplies through valves 93, 94 vehicle propulsion motors 97, 98 and wherein both pumps are driven by a common motor 10, the flow output of the variable pump 17 is controlled by rod means 55 responsive to the delivery pressure of both pumps. Rod 55 is connected to one end of spring-biased stepped piston 53 having one area 59 subjected to the delivery of pump 17 and another area 63 subjected to the delivery of pump 15. The spring 57 reacts against a null piston 73 of greater area than areas 59, 63 and subjected to variable pump delivery through a throttle 76. In operation, and assuming the vehicle to be stationary and motors 28, 29 active, the constant delivery pump pressure in lines 67, 65 urges piston 53 to the left thereby reducing the output of pump 17 to zero. With motors 28, 29 inoperative and with pump 15 connected through a valve 40 to the output line 37 of pump 17 and with valves 93, 94 open and affording maximum flow at low pressure to the vehicle wheels the fluid pressure on piston areas 59, 63 is overcome by spring 57 and the rod 55 moves the pump 17 to its maximum flow output position.
GB3626471A 1970-08-01 1971-08-02 Power controlled hydraulic drive systems Expired GB1361861A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702038414 DE2038414B2 (en) 1970-08-01 1970-08-01 CONTROL DEVICE FOR A HYDROSTATIC TRAVEL DRIVE AND A HYDROSTATIC WORK EQUIPMENT DRIVE OF A LOADER VEHICLE WITH TRACK CHAINS

Publications (1)

Publication Number Publication Date
GB1361861A true GB1361861A (en) 1974-07-30

Family

ID=5778680

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3626471A Expired GB1361861A (en) 1970-08-01 1971-08-02 Power controlled hydraulic drive systems

Country Status (3)

Country Link
DE (1) DE2038414B2 (en)
FR (1) FR2101886A5 (en)
GB (1) GB1361861A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265670A (en) * 1992-03-18 1993-10-06 Hoerbiger Ventilwerke Ag An hydraulic actuating arrangement

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3962870A (en) * 1975-04-23 1976-06-15 International Harvester Company Variable volume dual pump circuit
DE2603563C2 (en) * 1976-01-30 1986-02-20 Linde Ag, 6200 Wiesbaden Control device for a pump unit consisting of at least two pumps
DD133698A1 (en) * 1977-11-28 1979-01-17 Stefan Hein BORDER CONTROL FOR HYDROSTATIC DRIVES
DE3044144A1 (en) * 1980-11-24 1982-09-09 Linde Ag, 6200 Wiesbaden HYDROSTATIC DRIVE SYSTEM WITH ONE ADJUSTABLE PUMP AND SEVERAL CONSUMERS
DE3323278C2 (en) * 1983-06-28 1986-05-22 Hydromatik GmbH, 7915 Elchingen Control device for several drive units consisting of hydrostatic gears
DE3728207A1 (en) * 1987-08-24 1989-03-09 Rexroth Mannesmann Gmbh Valve arrangement for two load-regulated pumps driven by a common drive
WO1991002180A1 (en) * 1989-08-09 1991-02-21 Moskovskoe Nauchno-Proizvodstvennoe Obiedinenie Po Stroitelnomu I Dorozhnomu Mashinostroeniju Positive-displacement hydraulic transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265670A (en) * 1992-03-18 1993-10-06 Hoerbiger Ventilwerke Ag An hydraulic actuating arrangement
GB2265670B (en) * 1992-03-18 1995-11-22 Hoerbiger Ventilwerke Ag An hydraulic actuating arrangement

Also Published As

Publication number Publication date
DE2038414A1 (en) 1972-02-17
FR2101886A5 (en) 1972-03-31
DE2038414B2 (en) 1977-03-17

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee