GB1347056A - Power control device for two or more hydraulic pumps - Google Patents

Power control device for two or more hydraulic pumps

Info

Publication number
GB1347056A
GB1347056A GB3489971A GB3489971A GB1347056A GB 1347056 A GB1347056 A GB 1347056A GB 3489971 A GB3489971 A GB 3489971A GB 3489971 A GB3489971 A GB 3489971A GB 1347056 A GB1347056 A GB 1347056A
Authority
GB
United Kingdom
Prior art keywords
pressure
restrictor
servomotor
pump
responsive
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
GB3489971A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1347056A publication Critical patent/GB1347056A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/02—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for several machines or pumps connected in series or in parallel
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • 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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/431—Pump capacity control by electro-hydraulic control means, e.g. using solenoid valves
    • 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
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/28—Investigating the spectrum
    • G01J3/30—Measuring the intensity of spectral lines directly on the spectrum itself
    • G01J3/32—Investigating bands of a spectrum in sequence by a single detector

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Operation Control Of Excavators (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

1347056 Fluid-pressure servomotor systems CONSTANTIN RAUCH 26 July 1971 [5 Aug 1970] 34899/71 Heading G3P Two hydraulic pumps 1, 2 driven by a common means are each provided with an output regulator responsive to the fluid pressures in both delivery lines 3, 4. The pump 1 has a servomotor 5 controlled by a pilot valve 11 responsive to the pressure between a fixed restrictor 15 supplied from the delivery line 3 and a variable restrictor 17; a further variable restrictor 24 responsive to the pressure in the delivery line 4 is arranged in parallel with the restrictor 17. A similar arrangement controls a servomotor 6 for the pump 2 in accordance with the pressures in the lines 3, 4. If an increase in pressure occurs, for example, in the delivery line 4 the restrictor 24 increases the pressure applied to the pilot valve 11 to reduce the output of the pump 1. Relief valves 21, 22 may each be replaced by a pressure responsive valve serving as a further control valve for its associated servomotor which is connected through a mechanical linkage to a further variable restrictor in parallel with the restrictor 23 or 24. The arrangement is such that when maximum delivery pressure is reached in line 4, for example, the further variable restrictor is opened to increase the output in the line 3 from the pump 1. In both embodiments each servomotor is connected to its pilot valve by a feed-back spring having a characteristic which keeps the product of pressure and rate of flow constant.
GB3489971A 1970-08-05 1971-07-26 Power control device for two or more hydraulic pumps Expired GB1347056A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2038968A DE2038968C3 (en) 1970-08-05 1970-08-05 Capacity control device for two or more hydraulic pumps

Publications (1)

Publication Number Publication Date
GB1347056A true GB1347056A (en) 1974-02-13

Family

ID=5778948

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3489971A Expired GB1347056A (en) 1970-08-05 1971-07-26 Power control device for two or more hydraulic pumps

Country Status (7)

Country Link
US (1) US3767327A (en)
CH (1) CH541723A (en)
DE (1) DE2038968C3 (en)
FR (1) FR2103965A5 (en)
GB (1) GB1347056A (en)
NL (1) NL7110730A (en)
SE (1) SE372064B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2232226A5 (en) * 1973-05-28 1974-12-27 Poclain Sa
US3910044A (en) * 1973-08-24 1975-10-07 Case Co J I Hydraulic summating system
DE2505779C2 (en) * 1975-02-12 1983-01-13 Robert Bosch Gmbh, 7000 Stuttgart Load limit control device for adjustable pumps
DE2505780C2 (en) * 1975-02-12 1986-03-06 Robert Bosch Gmbh, 7000 Stuttgart Device for regulating at least one adjustable pump
US3999892A (en) * 1976-02-09 1976-12-28 Caterpillar Tractor Co. Interconnected pump control means of a plurality of pumps
US4212596A (en) * 1978-02-23 1980-07-15 Caterpillar Tractor Co. Pressurized fluid supply system
US4498847A (en) * 1982-06-29 1985-02-12 Kabushiki Kaisha Komatsu Seisakusho Control system for variable displacement hydraulic pumps
DE3232695C2 (en) * 1982-09-02 1984-08-16 Hydromatik GmbH, 7915 Elchingen Capacity control device for a hydraulic pump
US4545202A (en) * 1983-10-24 1985-10-08 Sundstrand Corporation Pressure-regulating system
DE3340332C2 (en) * 1983-11-08 1988-11-10 Hydromatik GmbH, 7915 Elchingen Power control device for a hydrostatic drive with flow rate adjustment
US4613286A (en) * 1984-12-31 1986-09-23 Kabushiki Kaisha Komatsu Seisakusho Constant torque control system for a variable displacement pump or pumps
DE3638889A1 (en) * 1986-11-14 1988-05-26 Hydromatik Gmbh TOTAL PERFORMANCE CONTROL DEVICE FOR AT LEAST TWO HYDROSTATIC GEARBOXES
CA1278978C (en) * 1987-02-19 1991-01-15 Lary Lynn Williams Hydraulic system for an industrial machine
DE3728207A1 (en) * 1987-08-24 1989-03-09 Rexroth Mannesmann Gmbh Valve arrangement for two load-regulated pumps driven by a common drive
DE4118869C2 (en) * 1991-06-07 1995-06-29 Hydromatik Gmbh Control device for controlling the displacement volume of several hydrostatic machines
US6109030A (en) * 1998-02-13 2000-08-29 Sauer Inc. Apparatus and method for ganging multiple open circuit pumps
CA2503818A1 (en) * 2004-04-08 2005-10-08 Timberjack, Inc. Tree feller power management
US7519837B2 (en) * 2004-06-15 2009-04-14 Hewlett-Packard Development Company, L.P. Power controller
US7793117B2 (en) * 2006-10-12 2010-09-07 Hewlett-Packard Development Company, L.P. Method, apparatus and system for determining power supply to a load
US8571753B2 (en) 2010-04-14 2013-10-29 Caterpillar Forest Products Inc. Power management system for a forestry machine to automatically adjust engine load

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002462A (en) * 1957-08-13 1961-10-03 Racine Hydraulics & Machinery Fluid translating apparatus
US3188971A (en) * 1962-08-13 1965-06-15 Bendix Corp Control system for a pump
DE2017656A1 (en) * 1969-04-23 1970-11-05 Pensa, Carlo, Esino Lario, Como (Italien) Hydraulic flow rate adjustment device for one or more pumps
DE1922269A1 (en) * 1969-04-29 1970-11-12 Bellows Valvair Kaemper Gmbh Total power controller

Also Published As

Publication number Publication date
FR2103965A5 (en) 1972-04-14
US3767327A (en) 1973-10-23
NL7110730A (en) 1972-02-08
DE2038968A1 (en) 1972-02-10
CH541723A (en) 1973-09-15
DE2038968C3 (en) 1978-09-07
SE372064B (en) 1974-12-09
DE2038968B2 (en) 1974-02-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees