초록 ▼

Each nozzle vane of a turbine includes a leading edge cavity having an insert spaced from interior wall surfaces of the vane. The insert includes impingement holes for flowing cooling medium from within the insert through the holes for impingement cooling of the vane walls. The insert has a divider

Each nozzle vane of a turbine includes a leading edge cavity having an insert spaced from interior wall surfaces of the vane. The insert includes impingement holes for flowing cooling medium from within the insert through the holes for impingement cooling of the vane walls. The insert has a divider dividing the insert into first and second chambers. Cooling medium is supplied directly from a source to the first chamber for impingement cooling of the adjacent vane wall surfaces. Cooling medium at a substantially reduced pressure resulting from impingement cooling of the outer wall of the nozzle segment is supplied to the second chamber. The pressure of the cooling medium supplied the second chamber establishes the pressure difference between the interior and the exterior of the insert thereby affording increased cooling intensity of the impingement cooling flow.

대표청구항 ▼

[ What is claimed is:] [1.] A stator vane segment for forming part of a stage of a rotary machine, comprising:inner and outer walls spaced from one another;a stator vane extending between said inner and outer walls and having forward, leading and aft trailing edges, said vane including a discrete ca

[ What is claimed is:] [1.] A stator vane segment for forming part of a stage of a rotary machine, comprising:inner and outer walls spaced from one another;a stator vane extending between said inner and outer walls and having forward, leading and aft trailing edges, said vane including a discrete cavity between the leading and trailing edges and extending lengthwise of said vane adjacent the forward leading edge thereof, interior wall surfaces of said vane in part defining said cavity;an insert sleeve within said cavity for receiving a cooling medium and spaced from said interior wall surfaces of said vane;said sleeve having a plurality of holes therealong for flowing the cooling medium through said sleeve holes into the space between said sleeve and said interior wall surfaces for impingement cooling of said vane along said leading edge thereof;said sleeve having a divider extending at least a portion of the length of said insert and dividing the sleeve into first and second chambers;said insert having first and second inlets to said first and second chambers, respectively, for supplying the cooling medium to said chambers at different pressures.