Stator vane with inner and outer shroud

(19)

(11)

EP 1 707 744 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	27.05.2009 Bulletin 2009/22

(43)	Date of publication A2:
	04.10.2006 Bulletin 2006/40

(21)	Application number: 06251185.2

(22)	Date of filing: 06.03.2006

(51)

International Patent Classification (IPC):

F01D 5/22^(2006.01)

F01D 9/04^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA HR MK YU

(30)

Priority:

07.03.2005 US 72249

(71)	Applicant: GENERAL ELECTRIC COMPANY
	Schenectady, NY 12345 (US)

(72)	Inventors:
	Schirle, Steve Mark Anderson, Carolina 29621 (US) Zacharias, Robert M. Fountain Inn South Carolina 29644 (US) Cencula, James Edward Neenah, Wisconsin 54956 (US) Martin, Nicholas F. Simpsonville, South Carolina 29681 (US) Tipton, Thomas R. Greer South Carolina 29651 (US)

(74)	Representative: Bedford, Grant Richard
	GE London Patent Operation 15 John Adam Street London WC2N 6LU 15 John Adam Street London WC2N 6LU (GB)

(54)	Stator vane with inner and outer shroud

(57) Vibration induced compressor vane failure from tip leakage vortex bursting is eliminated or minimized. By securing the vane at opposite ends to inner and outer stationary casings (44, 42), tip leakage is entirely avoided hence avoiding the mechanism for inducing vibration. By contouring the inner surface of the flow path to converge the flow in a downstream direction with a cantilevered compressor vane having a vane tip spaced from the inner casing surface, airflow lift off is precluded or minimized maintaining the flow attached to the flowpath surfaces with consequent avoidance of tip vortex induced vibration.

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