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US 2003/0113206 A1Published application
Selective step turbine nozzle
AssigneeGeneral Electric Company
InventorsJohn Peter Heyward, Robert Ingram Ackerman, Gregory Alan White
Life of this patent
Estimating the term…
Abstract
A turbine nozzle includes segments of outer and inner bands supporting corresponding vane pairs. The bands adjoin each other at corresponding ends along splitlines, with each band having a forward land, an opposite aft land, and a middle land extending therebetween. The forward lands have a nominal aft-facing step, the aft lands have a nominal forward-facing step and the middle lands are nominally flush.
Claims20
A turbine nozzle comprising:
- a row of nozzle segments each including a pair of vanes mounted at opposite ends to outer and inner bands;
- each of said vanes having axially opposite leading and trailing edges and circumferentially opposite pressure and suction sides extending radially between said opposite ends;
- each of said bands having circumferentially opposite first and second ends adjoining at respective splitlines therebetween;
- each of said band ends having a forward land extending along said splitline near said vane leading edge, an aft land extending along said splitline near said vane trailing edge, and a middle land extending along said splitline over an intermediate portion of said vane between said forward and aft lands to collectively form flowpath surfaces bounding combustion gas flow between said vanes;
- and
- said forward lands at said splitlines having a nominal aft-facing, said aft lands at said splitlines having a nominal forward-facing step and said middle lands being nominally flush.
3 more elements
A turbine nozle comprising:
- a row of nozzle segments each including a pair of vanes mounted at opposite ends to outer and inner bands;
- each of said vanes having axially opposite leading and trailing edges and circumferentially opposite pressure and suction sides extending radially between said opposite ends;
- each of said bands having circumferentially opposite first and second ends adjoining at respective splitlines therebetween;
- each of said band ends having a forward land extending along said splitline near said vane leading edge, an aft land extending along said splitline near said vane trailing edge, and a middle land extending along said splitline over an intermediate portion of said vane between said forward and aft lands to collectively form flowpath surfaces bounding combustion gas flow between said vanes;
- said forward lands at said splitlines having a nominal aft-facing step, said aft lands at said splitlines having a nominal forward-facing step and said middle lands being nominal flush;
- and
- said middle lands have a smaller manufacturing tolerance in radial position than said forward and aft lands at said splitlines.
4 more elements
Dependencies are inferred from the claim text.