GB1450473A - Apparatus for controlling hydraulic pressure - Google Patents

Apparatus for controlling hydraulic pressure

Info

Publication number
GB1450473A
GB1450473A GB198374A GB198374A GB1450473A GB 1450473 A GB1450473 A GB 1450473A GB 198374 A GB198374 A GB 198374A GB 198374 A GB198374 A GB 198374A GB 1450473 A GB1450473 A GB 1450473A
Authority
GB
United Kingdom
Prior art keywords
pressure
cylinder
piston
fluid
comparator
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
GB198374A
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.)
Consiglio Nazionale delle Richerche CNR
Original Assignee
Consiglio Nazionale delle Richerche CNR
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 Consiglio Nazionale delle Richerche CNR filed Critical Consiglio Nazionale delle Richerche CNR
Publication of GB1450473A publication Critical patent/GB1450473A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F15B21/087—Control strategy, e.g. with block diagram
    • 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
    • F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Control Of Fluid Pressure (AREA)
  • Reciprocating Pumps (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

1450473 Automatic control of pressure CONSIGLIO NAZIONALE DELLE RICERCHE 16 Jan 1974 [16 Jan 1973] 01983/74 Headings G3N and G3R Apparatus for controlling hydraulic pressure, e.g. pressure in a cylinder 9 under test, comprises a comparator 5 which receives an electrical reference signal from a generator 6 indicating the desired pressure and an electrical feedback signal from a transducer 7 indicating the actual pressure, the comparator output being fed to a device 4 producing a control pressure differential which is applied across a piston head 14 to displace the piston in cylinder 2 and thus adjust the test pressure until the comparator output is reduced to zero. As shown the device 4 is a servovalve which receives pressurized hydraulic fluid from a source 1 and directs the fluid through one of two ducts 10a, b. The enlarged head 14 of the piston relative to the stem 15 produces amplification of the applied pressure. Loss of hydraulic fluid past the head 14 is made up through a duct 16 which is uncovered when the piston is in its extreme rear position. Fluid is also introduced to the cylinder 9 through a pipe union 13. If the cylinder 9 ruptures, the output of the comparator 5 exceeds a limiting value and the fluid source 1 is isolated. The generator 6 is a function generator producing a signal which corresponds to a desired test cycle, the number of applied cycles being counted by a logic circuit (not shown). The reference signal may alternatively be constant or manually variable.
GB198374A 1973-01-16 1974-01-16 Apparatus for controlling hydraulic pressure Expired GB1450473A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT4771273A IT976905B (en) 1973-01-16 1973-01-16 EQUIPMENT TO PROVIDE A PRESSURE VARIABLE OVER TIME WITH A PRESET ELEGANCE

Publications (1)

Publication Number Publication Date
GB1450473A true GB1450473A (en) 1976-09-22

Family

ID=11262044

Family Applications (1)

Application Number Title Priority Date Filing Date
GB198374A Expired GB1450473A (en) 1973-01-16 1974-01-16 Apparatus for controlling hydraulic pressure

Country Status (5)

Country Link
JP (1) JPS507105A (en)
DE (1) DE2401202A1 (en)
FR (1) FR2214052B3 (en)
GB (1) GB1450473A (en)
IT (1) IT976905B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076050A1 (en) * 1981-09-08 1983-04-06 Gds Instruments Limited Pressure source
EP0118967A1 (en) * 1983-02-02 1984-09-19 Halliburton Company Apparatus for controlling pressure in a chamber
US4856413A (en) * 1982-04-06 1989-08-15 U.S. Philips Corporation Examination apparatus with mass balancing for a part thereof which is pivotable about an axis
GB2461061A (en) * 2008-06-19 2009-12-23 Vetco Gray Controls Ltd Subsea hydraulic intensifier with supply directional control valves electronically switched
EP2447545A1 (en) 2010-11-02 2012-05-02 Vetco Gray Controls Limited High pressure intensifiers
CN103939421A (en) * 2014-03-10 2014-07-23 北京工业大学 Fatigue test method and device used for hydraulic cylinder
EP3067573A3 (en) * 2015-02-19 2017-01-25 Robert Bosch Gmbh Method of dampening pressure pulsations in a working fluid within a conduit

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS585384A (en) * 1981-07-02 1983-01-12 Sumitomo Chem Co Ltd Adherent resin composition
JPS58193914A (en) * 1982-04-09 1983-11-11 Hitachi Constr Mach Co Ltd Trouble preindicating device for hydraulic system
JPH02500999A (en) * 1986-08-07 1990-04-05 イギリス国 Test equipment and method
CN1312948C (en) * 2000-05-26 2007-04-25 松下电器产业株式会社 Antenna, antenna arrangement and radio arrangement
US6712587B2 (en) * 2001-12-21 2004-03-30 Waters Investments Limited Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatography
CN102798570A (en) * 2011-05-23 2012-11-28 北京玻钢院复合材料有限公司 High pressure fatigue tester
CN104458306B (en) * 2014-12-04 2016-09-07 中国船舶重工集团公司第七○二研究所 One dry and wet transfer test device under water
CN104677624A (en) * 2015-03-19 2015-06-03 天津航天瑞莱科技有限公司苏州分公司 Air pressure fatigue load test method and device for train window

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076050A1 (en) * 1981-09-08 1983-04-06 Gds Instruments Limited Pressure source
US4856413A (en) * 1982-04-06 1989-08-15 U.S. Philips Corporation Examination apparatus with mass balancing for a part thereof which is pivotable about an axis
EP0118967A1 (en) * 1983-02-02 1984-09-19 Halliburton Company Apparatus for controlling pressure in a chamber
AU573201B2 (en) * 1983-02-02 1988-06-02 Halliburton Company Digital pressure controller
GB2461061A (en) * 2008-06-19 2009-12-23 Vetco Gray Controls Ltd Subsea hydraulic intensifier with supply directional control valves electronically switched
WO2012059478A1 (en) 2010-11-02 2012-05-10 Vetco Gray Controls Limited High pressure intensifiers
EP2447545A1 (en) 2010-11-02 2012-05-02 Vetco Gray Controls Limited High pressure intensifiers
US9938993B2 (en) 2010-11-02 2018-04-10 Ge Oil & Gas Uk Limited High pressure intensifiers
CN103939421A (en) * 2014-03-10 2014-07-23 北京工业大学 Fatigue test method and device used for hydraulic cylinder
CN103939421B (en) * 2014-03-10 2016-05-18 北京工业大学 A kind of method for testing fatigue for hydraulic cylinder and device
EP3067573A3 (en) * 2015-02-19 2017-01-25 Robert Bosch Gmbh Method of dampening pressure pulsations in a working fluid within a conduit
US9829139B2 (en) 2015-02-19 2017-11-28 Robert Bosch Gmbh Method of dampening pressure pulsations in a working fluid within a conduit
US10495075B2 (en) 2015-02-19 2019-12-03 Robert Bosch Gmbh Method of dampening pressure pulsations in a working fluid within a conduit

Also Published As

Publication number Publication date
IT976905B (en) 1974-09-10
FR2214052B3 (en) 1976-11-05
DE2401202A1 (en) 1974-07-25
JPS507105A (en) 1975-01-24
FR2214052A1 (en) 1974-08-09

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee