Composite nozzle

Claim 2

A composite nozzle for a radial inward flow turbine wheel comprising: an outer nozzle ring having a plurality of spaced nozzle passages extending therethrough; and an inner nozzle ring of an erosion resistant material disposed radially inward from the outer nozzle ring and having a plurality of spaced nozzle passages extending therethrough individually aligned with the spaced nozzle passages of said outer nozzle ring to receive a flow of fluid therefrom, said inner nozzle ring radially disposed around said turbine wheel to deliver a flow of fluid thereto.

Claim 3

The composite nozzle of claim 1 wherein the spaced nozzle passages of said inner nozzle ring have a greater cross-sectional flow area than the spaced nozzle passages of said outer nozzle ring.

Claim 4

A composite nozzle for a radial inward flow turbine wheel comprising: an outer nozzle ring having a plurality of spaced nozzle passages extending therethrough, said outer nozzle ring spaced nozzle passages having a cross-sectional flow dimension D1 with a dimensional tolerance T1; and an inner nozzle ring of an erosion resistant material disposed radially inward from the outer nozzle ring and having a plurality of spaced nozzle passages extending therethrough individually aligned with the spaced nozzle passages of said outer nozzle ring, said inner nozzle ring spaced nozzle passages receiving a flow of fluid from said spaced nozzle passages of said outer nozzle ring and having a cross-sectional flow dimension D2 greater than D1 and with a dimensional tolerance T2 greater than T1 such that D2 - T2 is at least equal to D1 + T1 , said inner nozzle ring radially disposed around said turbine wheel to deliver a flow of fluid thereto.

Claim 5

A composite nozzle for a radial inward flow turbine wheel comprising: an outer nozzle ring having a plurality of spaced nozzle passages extending therethrough, said outer nozzle ring spaced nozzle passages having a cross-sectional flow dimension D1 with a dimensional tolerance T1; and an inner nozzle ring of an erosion resistant material disposed radially inward from the outer nozzle ring and having a plurality of spaced nozzle passages extending therethrough individually aligned with the spaced nozzle passages of said outer nozzle ring, said inner nozzle ring spaced nozzle passages receiving a flow of fluid from said spaced nozzle passages of said outer nozzle ring and having a cross-sectional flow dimension D2 greater than D1 and with a dimensional tolerance T2 greater than T1 such that D2 - T2 is at least equal to D1 + T1 , said inner nozzle ring radially disposed around said turbine wheel to deliver a flow of fluid thereto.

Claim 6

The composite nozzle of claim 3 wherein D2 - T2 is greater than D1 + T1.

Claim 7

The composite nozzle of claim 3 and in addition elastomeric seal means disposed between said outer nozzle ring and said inner nozzle ring.

Claim 8

The composite nozzle of claim 3 wherein the spaced nozzle passages of said outer nozzle ring have an enlarged tapered inlet section.

Claim 9

The composite nozzle of claim 3 wherein said plurality of spaced nozzle passages comprise two circumferential rows of staggered nozzle passages.

Claim 10

The composite nozzle of claim 3 wherein said inner nozzle ring is a sintered material.

Claim 11

The composite nozzle of claim 5 wherein said elastomeric seal means is a silicone rubber cemenT.

Claim 12

The composite nozzle of claim 1 wherein the spaced nozzle passages extending through said inner nozzle ring are substantially the same cross-sectional configuration as the spaced nozzle passages extending through said outer nozzle ring.

Claim 13

The composite nozzle of claim 3 wherein the spaced nozzle passages extending through said inner nozzle ring are substantially the same cross-sectional configuration as the spaced nozzle passages extending through said outer nozzle ring.

Claim 14

In combination: a radial turbine wheel; and a turbine housing to rotatably support said turbine wheel therein and direct the flow of fluid thereto, said turbine housing including a composite nozzle radially disposed around said turbine wheel to direct the flow of fluid from said housing to said radial turbine wheel; said composite nozzle comprising an outer nozzle ring having a plurality of spaced nozzle passages extending therethrough and an inner nozzle ring of an erosion resistant material disposed radially inward from said outer nozzle ring and having a plurality of spaced nozzle passages extending therethrough individually aligned with the spaced nozzle passages of said outer nozzle ring, the flow of fluid from said turbine housing to said radial turbine wheel being first through the spaced nozzle passages of said outer nozzle ring and then through the spaced nozzle passages of said inner nozzle ring.

Claim 15

In combination: a radial turbine wheel; and a turbine housing to rotatably support said turbine wheel therein and direct the flow of fluid thereto, said turbine housing including a composite nozzle radially disposed around said turbine wheel to direct the flow of fluid from said housing to said radial turbine wheel; said composite nozzle comprising an outer nozzle ring having a plurality of spaced nozzle passages extending therethrough and an inner nozzle ring of an erosion resistant material disposed radially inward from said outer nozzle ring and having a plurality of spaced nozzle passages extending therethrough individually aligned with the spaced nozzle passages of said outer nozzle ring, the flow of fluid from said turbine housing to said radial turbine wheel being first through the spaced nozzle passages of said outer nozzle ring and then through the spaced nozzle passages of said inner nozzle ring.

Claim 16

The combination of claim 12 wherein the spaced nozzle passages of said inner nozzle ring are substantially the same cross-sectional configuration as the spaced nozzle passages of said outer nozzle ring.

Claim 17

The composite nozzle of claim 13 wherein the spaced nozzle passages of said inner nozzle ring have a greater cross-sectional flow area than the spaced nozzle passages of said outer nozzle ring.