GB1325022A - Hydraulic installation - Google Patents

Hydraulic installation

Info

Publication number
GB1325022A
GB1325022A GB5586270A GB5586270A GB1325022A GB 1325022 A GB1325022 A GB 1325022A GB 5586270 A GB5586270 A GB 5586270A GB 5586270 A GB5586270 A GB 5586270A GB 1325022 A GB1325022 A GB 1325022A
Authority
GB
United Kingdom
Prior art keywords
conduit
valve
pressure
spring
pressure medium
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
GB5586270A
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1325022A publication Critical patent/GB1325022A/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
    • F16H61/4148—Open loop circuits
    • 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
    • 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
    • F16H61/4008—Control of circuit pressure
    • F16H61/4017—Control of high pressure, e.g. avoiding excess pressure by a relief valve
    • 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
    • F16H61/4043—Control of a bypass valve
    • 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
    • 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
    • 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
    • F15B2211/50—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
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve

Landscapes

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

Abstract

1325022 Fluid pressure apparatus ROBERT BOSCH GmbH 24 Nov 1970 [28 Jan 1970] 55862/70 Heading F1P [Also in Division F2] In an hydraulic installation comprising constant delivery pumps 2, 3 driven by a prime mover 1 and delivering pressure medium to consumer circuits 4, 5, a pressure relief valve 13 has a switch-over pressure which is varied in accordance with the combined pressures in the circuits 4, 5, the pressure at which the relief valve opens being reduced in accordance with increase in the sum of the pressures delivered by the pumps 2, 3. The relief valve 13 is fed through a branch conduit 12 from circuit 4 and is acted on by a spring 14 on one side and a spring 19 on the other side, the spring 19 bearing on the free end face 18 of a differential piston 8 having two diameters 9, 10 which are acted upon by pressure medium in conduits 6, 11 connected to the circuits 4, 5. A conduit 15 connects the output from valve 13 to a reservoir 16. In order to protect valve 13 from overheating in the event of large quantities of pressure medium passing through it, a conduit 23 is connected between the output and a throttle valve 17 in conduit 15 to supply fluid to operate a valve 21, against the action of a spring 24, so that pressure medium in the overloaded circuit 4 may pass through conduit 20 to a reservoir 22. A similar arrangement of relief valves may be provided in circuit 5.
GB5586270A 1970-01-28 1970-11-24 Hydraulic installation Expired GB1325022A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2003740A DE2003740C3 (en) 1970-01-28 1970-01-28 Hydraulic system with at least two pumps

Publications (1)

Publication Number Publication Date
GB1325022A true GB1325022A (en) 1973-08-01

Family

ID=5760710

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5586270A Expired GB1325022A (en) 1970-01-28 1970-11-24 Hydraulic installation

Country Status (5)

Country Link
US (1) US3716308A (en)
CH (1) CH510203A (en)
DE (1) DE2003740C3 (en)
FR (1) FR2077386B1 (en)
GB (1) GB1325022A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2340188A (en) * 1998-08-03 2000-02-16 Unisia Jecs Corp Hydraulic circuits for internal combustion engines

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910044A (en) * 1973-08-24 1975-10-07 Case Co J I Hydraulic summating system
FR2259255B1 (en) * 1974-01-30 1976-11-26 Poclain Sa
FR2260013B1 (en) * 1974-02-04 1976-10-08 Poclain Sa
US4545202A (en) * 1983-10-24 1985-10-08 Sundstrand Corporation Pressure-regulating system
US4957283A (en) * 1988-10-07 1990-09-18 Combined Fluid Products Co. Vacuum system for feeding sheets
JPH0751796B2 (en) * 1989-04-18 1995-06-05 株式会社クボタ Backhoe hydraulic circuit
US5918573A (en) * 1997-05-02 1999-07-06 Killion; David L. Energy efficient fluid pump
US7086366B1 (en) 1999-04-20 2006-08-08 Metaldyne Machining And Assembly Company, Inc. Energy efficient fluid pump
GB0515494D0 (en) * 2005-07-28 2005-08-31 Bamford Excavators Ltd Fluid pumping apparatus
US9464580B2 (en) * 2014-01-02 2016-10-11 Caterpillar Paving Products Inc. Torque limit control
JP7256449B2 (en) 2019-04-12 2023-04-12 トヨタ自動車株式会社 cylinder head

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2273152A (en) * 1938-03-21 1942-02-17 American Machine & Metals Hydraulic pressure control for testing machines
FR1512503A (en) * 1966-12-27 1968-02-09 Oleomat Automatic pressure relief valves and hydraulic circuits for hydraulically controlled machinery
US3601506A (en) * 1969-11-28 1971-08-24 Chandler Evans Inc Wear equalized fuel delivery system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2340188A (en) * 1998-08-03 2000-02-16 Unisia Jecs Corp Hydraulic circuits for internal combustion engines
GB2340188B (en) * 1998-08-03 2000-09-06 Unisia Jecs Corp Hydraulic circuits for internal combustion engines
US6374603B1 (en) 1998-08-03 2002-04-23 Unisia Jecs Corporation Hydraulic circuits for internal combustion engines

Also Published As

Publication number Publication date
US3716308A (en) 1973-02-13
DE2003740C3 (en) 1981-05-07
FR2077386A1 (en) 1971-10-22
FR2077386B1 (en) 1976-03-19
DE2003740B2 (en) 1980-08-07
DE2003740A1 (en) 1971-08-12
CH510203A (en) 1971-07-15

Similar Documents

Publication Publication Date Title
GB1325022A (en) Hydraulic installation
GB1325417A (en) Fluid power braking and steering system
GB1335536A (en) Apparatus for regulating the total power consumption of at least two pumps
GB1347056A (en) Power control device for two or more hydraulic pumps
GB1493704A (en) Fluid control apparatus
GB1309162A (en) Fluid flow-regulating valves
ES429520A1 (en) Hydraulic summating system
GB1415726A (en) Hydrostatic drive
GB1309926A (en) Hydraulic units
GB1157104A (en) Hydraulic Pressure Control Circuit
GB1315064A (en) Hydraulic control system for a variable displacement pump supplied by a feed pump
GB1153580A (en) Fuel Injection System
GB1305116A (en)
GB1290376A (en)
GB1226447A (en)
GB1482827A (en) Fluid feed device including variable and fixed capacity pumps
GB1311868A (en) Gear pumps
GB1381827A (en) Device for regulating two coupled pumps
GB1390917A (en) Hydraulic transmission system
GB1375840A (en)
GB982542A (en) Improvements in lubricating liquid feed arrangements
GB1005842A (en) Improvements in or relating to hydraulic pumps
GB1059304A (en) Improvements in or relating to lubricating systems
GB1080001A (en) Improvements in hydraulic pumping systems having a delivery regulating device
GB913197A (en) Improvements in hydraulic systems

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee