JPS57129204A - Sealing device for movable vane tip - Google Patents

Sealing device for movable vane tip

Info

Publication number
JPS57129204A
JPS57129204A JP1290481A JP1290481A JPS57129204A JP S57129204 A JPS57129204 A JP S57129204A JP 1290481 A JP1290481 A JP 1290481A JP 1290481 A JP1290481 A JP 1290481A JP S57129204 A JPS57129204 A JP S57129204A
Authority
JP
Japan
Prior art keywords
leak
plate spring
preventing
movable vane
preventing fin
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.)
Pending
Application number
JP1290481A
Other languages
Japanese (ja)
Inventor
Yoshitaka Ezawa
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1290481A priority Critical patent/JPS57129204A/en
Publication of JPS57129204A publication Critical patent/JPS57129204A/en
Pending 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
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
    • F01D11/14—Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

PURPOSE:To prevent contacting between a shroud and a leak-preventing fin, by installing a plate spring in the position that is opposed to the leak-preventing fin on the inside circumferential surface of the shroud, so that the plate spring is bent by pressure of fluid from a flow-out hole. CONSTITUTION:A fluid, extracted from a compressor, passes through a space 8 and a flow-out hole 6 and flows out to an expansion chamber 12. As a movable vane 1 is heated, the movable vane 1 expands in the radial direction. On the other hand, since expansion of a casing 4 in the radial direction is small, a gap between a leak-preventing fin 2a and a plate spring 10 and that between a leak- preventing fin 2b and a plate spring 11 become small. If the gaps become thus small, inside pressure of the expansion chamber 12 rises, and therefore, free ends of the plate springs 10 and 11 bend in the direction of departing from the leak-preventing fins 2a and 2b. As a result, it becomes possible to prevent contacting between the leak-preventing fin and the plate spring.
JP1290481A 1981-02-02 1981-02-02 Sealing device for movable vane tip Pending JPS57129204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1290481A JPS57129204A (en) 1981-02-02 1981-02-02 Sealing device for movable vane tip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1290481A JPS57129204A (en) 1981-02-02 1981-02-02 Sealing device for movable vane tip

Publications (1)

Publication Number Publication Date
JPS57129204A true JPS57129204A (en) 1982-08-11

Family

ID=11818347

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1290481A Pending JPS57129204A (en) 1981-02-02 1981-02-02 Sealing device for movable vane tip

Country Status (1)

Country Link
JP (1) JPS57129204A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1219788A3 (en) * 2000-12-28 2004-02-11 ALSTOM (Switzerland) Ltd Arrangement of vane platforms in an axial turbine for reducing the gap losses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1219788A3 (en) * 2000-12-28 2004-02-11 ALSTOM (Switzerland) Ltd Arrangement of vane platforms in an axial turbine for reducing the gap losses

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