GB1256749A - - Google Patents

Info

Publication number
GB1256749A
GB1256749A GB1256749DA GB1256749A GB 1256749 A GB1256749 A GB 1256749A GB 1256749D A GB1256749D A GB 1256749DA GB 1256749 A GB1256749 A GB 1256749A
Authority
GB
United Kingdom
Prior art keywords
valve
servo
cut
pressure
turbine
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
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 filed Critical
Publication of GB1256749A publication Critical patent/GB1256749A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
    • F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
    • F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)

Abstract

1,256,749. Steam turbines. TOKYO SHIBAURA DENKI K.K. July 15, 1969 [July 15, 1968], No.35620/69. Heading F1T. [Also in Division G3] The fluid path between an electrically operated servo valve 21 and a servo-motor 13 controlling a valve 4 regulating the steam supply to a turbine 1 is interrupted by a valve 24 when a cut-off valve 49 receives an emergency trip signal. Dangerous over-speeding of the turbine or a fault in the electrical control system causes the trip signal to operate an electromagnetic device 48 on the cut-off valve which releases the pressure in a device 41 to operate the valve 24. The pressure may also be released by a regulator 51 in response to an abnormal increase in speed. Operation of the valve 24 causes the upper side of the servomotor piston to be connected to a high pressure oil line 40b and the lower side to be connected to drain port 35 so that the valve 4 is closed by the linkage 11, 10, 7, 5. In the normal position of the valve 24 the opposite sides of the piston are connected to output lines 38, 39 from the servo valve. The servo valve is supplied with highpressure flame retardant synthetic oil, such as a phosphoric ester, and the cut-off device with low-pressure turbine oil.
GB1256749D 1968-07-15 1969-07-15 Expired GB1256749A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4902868 1968-07-15

Publications (1)

Publication Number Publication Date
GB1256749A true GB1256749A (en) 1971-12-15

Family

ID=12819628

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1256749D Expired GB1256749A (en) 1968-07-15 1969-07-15

Country Status (2)

Country Link
US (2) US3551066A (en)
GB (1) GB1256749A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990230A (en) * 1973-11-16 1976-11-09 Hitachi, Ltd. Method for controlling steam turbine and device therefor in composite plant equipped with steam turbine and gas turbine
US4082115A (en) * 1976-08-16 1978-04-04 General Electric Company Valve operator
JPS57210170A (en) * 1981-06-17 1982-12-23 Hitachi Ltd Operation controller for hydraulic machinery
US4929148A (en) * 1988-12-27 1990-05-29 General Electric Company Turbine trip throttle valve control system
FR2681375B1 (en) * 1991-09-18 1995-01-20 Alsthom Gec DEVICE FOR CAUSING THE DROP IN PRESSURE OF THE HIGH PRESSURE OIL OF CONTROL OF THE VALVES OF INTAKE OF A TURBINE IN THE EVENT OF OVER-SPEED.
JP6746511B2 (en) 2017-01-31 2020-08-26 株式会社東芝 Steam turbine valve drive
CN114352360B (en) * 2022-01-13 2024-09-20 中国长江动力集团有限公司 Ac/dc safety control box

Also Published As

Publication number Publication date
US3551066A (en) 1970-12-29
US3669559A (en) 1972-06-13

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years