JPS57122103A - Seal device at moving blade end - Google Patents

Seal device at moving blade end

Info

Publication number
JPS57122103A
JPS57122103A JP642181A JP642181A JPS57122103A JP S57122103 A JPS57122103 A JP S57122103A JP 642181 A JP642181 A JP 642181A JP 642181 A JP642181 A JP 642181A JP S57122103 A JPS57122103 A JP S57122103A
Authority
JP
Japan
Prior art keywords
space
moving blade
shroud
leaf springs
fins
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
JP642181A
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 JP642181A priority Critical patent/JPS57122103A/en
Publication of JPS57122103A publication Critical patent/JPS57122103A/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
    • F01D11/16—Adjusting or regulating tip-clearance, i.e. distance between rotor-blade tips and stator casing by self-adjusting means

Landscapes

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

Abstract

PURPOSE:To prevent a shroud and a fin from making contact with each other and improve sealing effect by enlarging an expansion chamber in such a way as forming a space on an inner face of the shroud facing a moving blade tip, and providing within the opening of the space leaf springs whose free ends confront the leak prevention fins. CONSTITUTION:Leak prevention fins 2a, 2b at the end of a moving blade 1 confront a turbine shroud 3 attached to a casing 4. A circumferential space 6 is formed on the inner circumference face 3a of the shroud confronting the moving blade 1, and leaf springs 7,8 are provided on the both sides of an opening of the space 6. An expansion chamber 9 is formed by the leaf springs 7,8, the turbine shroud 3, the moving blade 1, and fins 2a, 2b. The right space 10 of the fin 2a is called a high pressure side and the left space 11 of the fin 2b is a low pressure side. Consequently, the free ends of the leaf springs 7,8 can bend and get out of the fins 2a, 2b due to differential pressure of fluid, thus attaining the expected purpose.
JP642181A 1981-01-21 1981-01-21 Seal device at moving blade end Pending JPS57122103A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP642181A JPS57122103A (en) 1981-01-21 1981-01-21 Seal device at moving blade end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP642181A JPS57122103A (en) 1981-01-21 1981-01-21 Seal device at moving blade end

Publications (1)

Publication Number Publication Date
JPS57122103A true JPS57122103A (en) 1982-07-29

Family

ID=11637901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP642181A Pending JPS57122103A (en) 1981-01-21 1981-01-21 Seal device at moving blade end

Country Status (1)

Country Link
JP (1) JPS57122103A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182174A2 (en) * 2008-10-29 2010-05-05 General Electric Company Steam turbine with pressure activated sealing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2182174A2 (en) * 2008-10-29 2010-05-05 General Electric Company Steam turbine with pressure activated sealing device
EP2182174A3 (en) * 2008-10-29 2012-03-14 General Electric Company Steam turbine with pressure activated sealing device

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