JPS57102503A - Sealing structure for gap on tip of moving vane of turbine - Google Patents

Sealing structure for gap on tip of moving vane of turbine

Info

Publication number
JPS57102503A
JPS57102503A JP55177232A JP17723280A JPS57102503A JP S57102503 A JPS57102503 A JP S57102503A JP 55177232 A JP55177232 A JP 55177232A JP 17723280 A JP17723280 A JP 17723280A JP S57102503 A JPS57102503 A JP S57102503A
Authority
JP
Japan
Prior art keywords
tip
grooves
working fluid
turbine
moving vane
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
JP55177232A
Other languages
Japanese (ja)
Inventor
Kazuhiko Kawaike
Takashi Ikeguchi
Narihisa Sugita
Masami Noda
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 JP55177232A priority Critical patent/JPS57102503A/en
Publication of JPS57102503A publication Critical patent/JPS57102503A/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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/20—Specially-shaped blade tips to seal space between tips and stator
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding

Landscapes

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

Abstract

PURPOSE:To reduce the leakage of working fluid, by providing a plurality of grooves on one of the tip of a moving vane and the inside surface of a casing to form a pressure dam. CONSTITUTION:Ribs 8 are protruded from the peripheral part of a shoud 2. Nmerous grooves 9, which extend obliquely to the direction (a) of revolution of moving vanes 1, are provided on the surface of the shroud 2 which faces a casing 7. The downstream end of each groove 9 is open but its upstream end is closed. Pumping action is caused at the grooves 9 by the revolution of the moving vanes 1 so that dynamic pressure is produced toward the high pressure side of a working fluid. Since the upstream end of each groove 9 is closed, a pressure dam is formed on the top of the rib 2. According to this constitution, the leakage of the working fluid is reduced to improve the turbine performance.
JP55177232A 1980-12-17 1980-12-17 Sealing structure for gap on tip of moving vane of turbine Pending JPS57102503A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55177232A JPS57102503A (en) 1980-12-17 1980-12-17 Sealing structure for gap on tip of moving vane of turbine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55177232A JPS57102503A (en) 1980-12-17 1980-12-17 Sealing structure for gap on tip of moving vane of turbine

Publications (1)

Publication Number Publication Date
JPS57102503A true JPS57102503A (en) 1982-06-25

Family

ID=16027454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55177232A Pending JPS57102503A (en) 1980-12-17 1980-12-17 Sealing structure for gap on tip of moving vane of turbine

Country Status (1)

Country Link
JP (1) JPS57102503A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2451568A (en) * 2007-07-31 2009-02-04 Gen Electric Seal tooth arrangement for gas turbine engine rotor blade tip shroud

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2451568A (en) * 2007-07-31 2009-02-04 Gen Electric Seal tooth arrangement for gas turbine engine rotor blade tip shroud
GB2451568B (en) * 2007-07-31 2012-06-27 Gen Electric Rotor blade

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