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GB2018895A - Force limiting device for an actuator rod - Google Patents

Force limiting device for an actuator rod

Info

Publication number
GB2018895A
GB2018895A GB7911862A GB7911862A GB2018895A GB 2018895 A GB2018895 A GB 2018895A GB 7911862 A GB7911862 A GB 7911862A GB 7911862 A GB7911862 A GB 7911862A GB 2018895 A GB2018895 A GB 2018895A
Authority
GB
United Kingdom
Prior art keywords
piston
actuator rod
force
hydraulic fluid
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.)
Granted
Application number
GB7911862A
Other versions
GB2018895B (en
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.)
Boeing North American Inc
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Publication of GB2018895A publication Critical patent/GB2018895A/en
Application granted granted Critical
Publication of GB2018895B publication Critical patent/GB2018895B/en
Expired 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Actuator (AREA)
  • Fluid-Driven Valves (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

In a force limiting device for an actuator rod having a valve actuator rod 76 coupled to a piston 66 slidable in a cylinder 64, one side of the piston being loaded by high pressure gas in a chamber 46 and the other side of the piston supplied with or exhausted of hydraulic fluid, the force applied to the actuator rod 76 when the valve has been moved by the hydraulic fluid from its closed position to an open stop position is arranged to be less than the initial valve opening force. The piston includes an interior cylindrical bore 70 which slidably receives a piston head 82 integral with the actuator rod 76. Atmospheric pressure communicates with the bore 70 through a passage 98 to act on the larger side 106 of the piston head, the smaller side 84 being in communication with the cylinder 64 through a clearance space around the rod 76. During valve opening the hydraulic fluid produces a force on the piston head 82 due to the pressure acting on the large area of the piston 66 but when the piston 66 forcibly abuts a piston stop 110 the hydraulic fluid becomes effective primarily only on the smaller piston head side 84 thereby limiting the maximum tensile force on the actuator rod when the valve reaches its fully open stop position. <IMAGE>
GB7911862A 1978-04-17 1979-04-04 Force limiting device for an actuator rod Expired GB2018895B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US89723878A 1978-04-17 1978-04-17

Publications (2)

Publication Number Publication Date
GB2018895A true GB2018895A (en) 1979-10-24
GB2018895B GB2018895B (en) 1982-09-15

Family

ID=25407597

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7911862A Expired GB2018895B (en) 1978-04-17 1979-04-04 Force limiting device for an actuator rod

Country Status (12)

Country Link
JP (1) JPS54140220A (en)
AU (1) AU538319B2 (en)
BE (1) BE875611A (en)
CA (1) CA1104467A (en)
CH (1) CH642728A5 (en)
DE (1) DE2915505A1 (en)
ES (1) ES479646A1 (en)
FR (1) FR2423703B1 (en)
GB (1) GB2018895B (en)
IT (1) IT1119723B (en)
NL (1) NL7902821A (en)
SE (1) SE440128B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177458A (en) * 1985-07-01 1987-01-21 Joy Mfg Co Dual stage hydraulic actuator
GB2180004A (en) * 1985-09-03 1987-03-18 Joy Mfg Co Pneumatic actuator for a mechanical device
CN108980144A (en) * 2018-08-07 2018-12-11 盛世瑶兰（深圳）科技有限公司 A kind of cylinder of Anti-splashing sanitary effect
CN110805642A (en) * 2019-11-18 2020-02-18 航宇救生装备有限公司 A heavy-load grading buffer and load-shedding device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112695724B (en) * 2020-12-14 2022-06-10 国网福建省电力有限公司 Hydraulic supporting mechanism of ship lift

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR971370A (en) * 1940-04-16 1951-01-16 Installation for remote control of a gate valve using pressurized fluid
US2329044A (en) * 1941-08-13 1943-09-07 Hugo C Gollmer Dual cylinder
US2478811A (en) * 1947-05-19 1949-08-09 W K M Company Inc Power-operated gate valve
FR2302430A1 (en) * 1975-02-26 1976-09-24 Milhyroux Sarl Ets R Multiple position linear actuator - has cylinder housing intermediate hollow piston in turn housing independent piston

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177458A (en) * 1985-07-01 1987-01-21 Joy Mfg Co Dual stage hydraulic actuator
AU591660B2 (en) * 1985-07-01 1989-12-14 Cooper Cameron Corporation Dual stage hydraulic actuator for expanding gate valve
GB2180004A (en) * 1985-09-03 1987-03-18 Joy Mfg Co Pneumatic actuator for a mechanical device
CN108980144A (en) * 2018-08-07 2018-12-11 盛世瑶兰（深圳）科技有限公司 A kind of cylinder of Anti-splashing sanitary effect
CN110805642A (en) * 2019-11-18 2020-02-18 航宇救生装备有限公司 A heavy-load grading buffer and load-shedding device

Also Published As

Publication number Publication date
BE875611A (en) 1979-08-16
DE2915505C2 (en) 1990-01-04
FR2423703B1 (en) 1984-03-23
NL7902821A (en) 1979-10-19
JPS54140220A (en) 1979-10-31
SE7903242L (en) 1979-10-18
GB2018895B (en) 1982-09-15
IT1119723B (en) 1986-03-10
CH642728A5 (en) 1984-04-30
AU538319B2 (en) 1984-08-09
IT7921836A0 (en) 1979-04-13
DE2915505A1 (en) 1979-10-25
SE440128B (en) 1985-07-15
AU4558679A (en) 1979-10-25
FR2423703A1 (en) 1979-11-16
CA1104467A (en) 1981-07-07
ES479646A1 (en) 1980-01-01
JPS6134583B2 (en) 1986-08-08

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980404