Global Patent Index - EP 1013884 A2

EP 1013884 A2 2000-06-28 - Turbine blade with actively cooled head platform

Title (en)

Turbine blade with actively cooled head platform

Title (de)

Turbinenschaufel mit aktiv gekühltem Deckbandelememt

Title (fr)

Aube de turbine avec plateforme refroidie

Publication

EP 1013884 A2 (DE)

Application

EP 99811187 A

Priority

  • DE 19860245 A
  • DE 19860244 A

Abstract (en)

The turbine blade(10) has cooling holes(17) in the blade's shroud element(11) running from the inside outwards and parallel to the direction of the blade's movement. Each cooling hole opens out into a surface recess(14) before the outer edge(25) of the shroud element and open to the outer space around the turbine blade. The recess may be located on the upper side(22) of the shroud element, with the cooling holes running into it at the side, or the recess may be on the side edge of the shroud element.

Abstract (de)

Bei einer luftgekühlten Turbinenschaufel (10), welche an der Schaufelspitze ein sich quer zur Schaufellängsachse erstreckendes Deckbandelement (11) aufweist, wobei das Deckbandelement (11) zur Kühlung von einer Mehrzahl von Kühlbohrungen (17) durchzogen ist, welche eingangsseitig mit wenigstens einem durch die Turbinenschaufel (10) zur Schaufelspitze verlaufenden Kühlluftkanal (18) in Verbindung stehen, und ausgangsseitig in den die Turbinenschaufel (10) umgebenden Aussenraum münden, wird eine verbesserte und gesicherte Kühlung dadurch erreicht, dass die Kühlbohrungen (17) in dem Deckbandelement (11) zumindest annähernd parallel zur Bewegungsrichtung der Schaufelspitze von innen nach aussen verlaufen und jeweils vor dem äusseren Rand (25) des Deckbandelements (11) in eine zum Aussenraum hin offene Oberflächenvertiefung münden. Vorzugsweise ist die Deckbandoberseite (22) mit mindestens zwei parallel verlaufenden Rippen (12) und (13) ausgerüstet, die im Zusammenwirken mit der gegenüberliegenden Gehäusewand eine Kavität (21) bilden, in die die aus den Kühlbohrungen (17) austretende Kühlluft einströmt. <IMAGE>

IPC 1-7 (main, further and additional classification)

F01D 5/22; F01D 5/18

IPC 8 full level (invention and additional information)

F01D 5/18 (2006.01); F01D 5/22 (2006.01)

CPC (invention and additional information)

F01D 5/225 (2013.01); F01D 5/187 (2013.01); F05D 2240/81 (2013.01)

Citation (applicant)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 1013884 A2 20000628; EP 1013884 A3 20031105; EP 1013884 B1 20050727; CN 1260442 A 20000719; US 6340284 B1 20020122

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