GB1212609A - Improvements in or relating to twin variable-delivery pump units - Google Patents

Improvements in or relating to twin variable-delivery pump units

Info

Publication number
GB1212609A
GB1212609A GB2455768A GB2455768A GB1212609A GB 1212609 A GB1212609 A GB 1212609A GB 2455768 A GB2455768 A GB 2455768A GB 2455768 A GB2455768 A GB 2455768A GB 1212609 A GB1212609 A GB 1212609A
Authority
GB
United Kingdom
Prior art keywords
pumps
piston
pushrod
delivery
valve
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
GB2455768A
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of GB1212609A publication Critical patent/GB1212609A/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
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • F16H61/448—Control circuits for tandem pumps or motors
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • F04B1/08—Control regulated by delivery pressure
    • 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
    • F16H61/433—Pump capacity control by fluid pressure control means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1,212,609. Reciprocating pumps; hydraulic circuits. LINDE A.G. May 23, 1968 [ May 24, 1967], No.24557/68. Heading F1A. In an arrangement in which two pumps 5, 6 deliver pressure to their respective loads, e. g. the ram system and traction motor of a mechanical shovel, along respective lines 21, 25 and through respective valves 28, 29, delivery is automatically controlled by a device in which a stepped piston 8, acted on by a spring 12, bears against a pushrod 14 acted on by a second spring 17, and a second piston 18, passing through the stepped piston 8, is integral with or connected to the pushrod 14. Working spaces 9, 10 and 19 are defined by the stepped piston 8 and the piston 18 respectively. The delivery line 21 is connected to the working space 10 and the delivery line 25 is connected to working spaces 9 or 19 according to the setting of a valve 23. Stroke adjusters 7, 16 of the pumps 5, 6 are operated by the members 18, 14 respectively. When the working spaces 9 and 10 are pressurized the piston 8 and the pushrod 14 move together so that delivery of both pumps is equally regulated. Pressurization of the working space 19, however, temporarily moves the pushrod 14 away from the stepped piston 18 and causes independent regulation of the pumps as described in the Specification. A valve 30 is connected between the two delivery lines 21, 25 so that both pumps may, if so required, deliver to the same load. The valve 23 may be manually positioned or may be adjusted to change setting at a predetermined pressure. One pedal may operate the valves 29, 30 and 23 in a described frequency.
GB2455768A 1967-05-24 1968-05-23 Improvements in or relating to twin variable-delivery pump units Expired GB1212609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL0056635 1967-05-24

Publications (1)

Publication Number Publication Date
GB1212609A true GB1212609A (en) 1970-11-18

Family

ID=7277929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2455768A Expired GB1212609A (en) 1967-05-24 1968-05-23 Improvements in or relating to twin variable-delivery pump units

Country Status (2)

Country Link
DE (1) DE1600848A1 (en)
GB (1) GB1212609A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941514A (en) * 1974-05-20 1976-03-02 Sundstrand Corporation Torque limiting control
USRE30226E (en) * 1974-05-20 1980-03-11 Sundstrand Corporation Torque limiting control
US20150226190A1 (en) * 2012-12-11 2015-08-13 Kawasaki Jukogyo Kabushiki Kaisha Variable displacement pump regulator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941514A (en) * 1974-05-20 1976-03-02 Sundstrand Corporation Torque limiting control
USRE30226E (en) * 1974-05-20 1980-03-11 Sundstrand Corporation Torque limiting control
US20150226190A1 (en) * 2012-12-11 2015-08-13 Kawasaki Jukogyo Kabushiki Kaisha Variable displacement pump regulator
EP2933490A4 (en) * 2012-12-11 2016-08-24 Kawasaki Heavy Ind Ltd Variable displacement pump regulator

Also Published As

Publication number Publication date
DE1600848A1 (en) 1971-09-30

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees