GB2301461A - Hydraulic valves - Google Patents

Hydraulic valves

Info

Publication number
GB2301461A
GB2301461A GB9616556A GB9616556A GB2301461A GB 2301461 A GB2301461 A GB 2301461A GB 9616556 A GB9616556 A GB 9616556A GB 9616556 A GB9616556 A GB 9616556A GB 2301461 A GB2301461 A GB 2301461A
Authority
GB
United Kingdom
Prior art keywords
valve
spool
operating
pilot
pressure
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.)
Withdrawn
Application number
GB9616556A
Other versions
GB9616556D0 (en
Inventor
George Kadlicko
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.)
Microhydraulics Inc
Original Assignee
Microhydraulics Inc
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
Priority claimed from GB9402146A external-priority patent/GB9402146D0/en
Priority claimed from GB9402147A external-priority patent/GB9402147D0/en
Priority claimed from GB9402142A external-priority patent/GB9402142D0/en
Priority claimed from GBGB9425144.4A external-priority patent/GB9425144D0/en
Priority claimed from GBGB9425092.5A external-priority patent/GB9425092D0/en
Application filed by Microhydraulics Inc filed Critical Microhydraulics Inc
Priority to GB9616556A priority Critical patent/GB2301461A/en
Priority claimed from PCT/CA1995/000057 external-priority patent/WO1995021332A1/en
Publication of GB9616556D0 publication Critical patent/GB9616556D0/en
Publication of GB2301461A publication Critical patent/GB2301461A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/16—Special measures for feedback, e.g. by a follow-up device
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B2013/0409—Position sensing or feedback of the valve member

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Servomotors (AREA)

Abstract

A hydraulic valve (10) includes a spool (40) movable within a body (12) to regulate flow across the valve (10). Movement of the spool (40) is controlled by an electromagnetic actuator (78) that operates either directly or through a pilot stage upon the spool (40). When operating through a pilot stage, the actuator varies pilot pressure by an operating member co-operating with an orifice. A flapper valve (129) may be used to vary a pair of pilot flows in complementary manner. Feedback signals of pressure and spool position are provided to a controller which selectively combines the signals to monitor the operating parameters of the valve. The controller may modify the position signal with the pressure signal to obtain an indication of flow rate through the valve (10).
GB9616556A 1994-02-04 1995-02-06 Hydraulic valves Withdrawn GB2301461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9616556A GB2301461A (en) 1994-02-04 1995-02-06 Hydraulic valves

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GB9402146A GB9402146D0 (en) 1994-02-04 1994-02-04 Pilot operator for valves
GB9402147A GB9402147D0 (en) 1994-02-04 1994-02-04 Actuator for direct acting control valve
GB9402142A GB9402142D0 (en) 1994-02-04 1994-02-04 Flapper valve
GBGB9425144.4A GB9425144D0 (en) 1994-12-13 1994-12-13 Improvements in or relating to hydraulic valves
GBGB9425092.5A GB9425092D0 (en) 1994-12-13 1994-12-13 Pilot controlled proportional valve
PCT/CA1995/000057 WO1995021332A1 (en) 1994-02-04 1995-02-06 Hydraulic valves
GB9616556A GB2301461A (en) 1994-02-04 1995-02-06 Hydraulic valves

Publications (2)

Publication Number Publication Date
GB9616556D0 GB9616556D0 (en) 1996-09-25
GB2301461A true GB2301461A (en) 1996-12-04

Family

ID=27547214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9616556A Withdrawn GB2301461A (en) 1994-02-04 1995-02-06 Hydraulic valves

Country Status (1)

Country Link
GB (1) GB2301461A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433126A (en) * 1966-10-19 1969-03-18 Sanders Associates Inc Hydraulic feedback system
DE3347000A1 (en) * 1983-12-24 1985-07-04 Robert Bosch Gmbh, 7000 Stuttgart Electrohydraulic arrangement for controlling a double-acting hydraulic motor
EP0177481A1 (en) * 1984-09-17 1986-04-09 Hoerbiger Ventilwerke Aktiengesellschaft Regulating method for a fluid cylinder
DE3738241A1 (en) * 1987-11-11 1989-05-24 Bosch Gmbh Robert Electrohydraulic device for the load-independent control of a volume flow in a manner proportional to an input signal
WO1989011597A1 (en) * 1988-05-17 1989-11-30 Moog Inc. Synthetisized flow-control servovalve
EP0439433A1 (en) * 1990-01-23 1991-07-31 IMI Norgren AG Pneumatic spool valve
JPH1079003A (en) * 1996-09-02 1998-03-24 Auto Denshi Kk Method and device for checking fire extinguisher and replacing chemical agent

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3433126A (en) * 1966-10-19 1969-03-18 Sanders Associates Inc Hydraulic feedback system
DE3347000A1 (en) * 1983-12-24 1985-07-04 Robert Bosch Gmbh, 7000 Stuttgart Electrohydraulic arrangement for controlling a double-acting hydraulic motor
EP0177481A1 (en) * 1984-09-17 1986-04-09 Hoerbiger Ventilwerke Aktiengesellschaft Regulating method for a fluid cylinder
DE3738241A1 (en) * 1987-11-11 1989-05-24 Bosch Gmbh Robert Electrohydraulic device for the load-independent control of a volume flow in a manner proportional to an input signal
WO1989011597A1 (en) * 1988-05-17 1989-11-30 Moog Inc. Synthetisized flow-control servovalve
EP0439433A1 (en) * 1990-01-23 1991-07-31 IMI Norgren AG Pneumatic spool valve
JPH1079003A (en) * 1996-09-02 1998-03-24 Auto Denshi Kk Method and device for checking fire extinguisher and replacing chemical agent

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol 10 no.249(M-511)(2305),27/8/96 *

Also Published As

Publication number Publication date
GB9616556D0 (en) 1996-09-25

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)