Tilted cone diffuser for use with an exhaust system of a turbine
AssigneeElliott Company
InventorJames R. Hardin
Life of this patent
Estimating the term…
Abstract
An exhaust system for a turbine includes an annular diffuser and a collector. The annular diffuser is positioned adjacent to a final stage of the turbine and includes a hub portion surrounding a turbine shaft and an outer cone having a substantially frusto-conical shape that is radially symmetrical about a central longitudinal axis thereof that is tilted relative to the turbine shaft. The collector has an inlet extending from the annular diffuser and an outlet. The collector is configured to include a turn that causes the collector to turn exhaust gases approximately 90° from the longitudinal axis of the turbine shaft. The outer cone of the annular diffuser is tilted in a direction of the turn of the collector.
Claims18
An exhaust system for a turbine comprising:
- a) an annular diffuser positioned adjacent to a final stage of the turbine, the diffuser comprising:
- i) a hub portion surrounding a turbine shaft, the turbine shaft having a central longitudinal axis;
- and
- ii) an outer cone having a substantially frusto-conical shape that is radially symmetrical about a central longitudinal axis thereof that is tilted relative to the turbine shaft;
- and
- b) a collector having an inlet extending from the annular diffuser and an outlet, the collector configured to include a turn that causes the collector to turn exhaust gases 90° from the longitudinal axis of the turbine shaft,
- wherein the outer cone of the annular diffuser is tilted in a direction of the turn of the collector.
A turbine comprising:
- a turbine shaft having a central longitudinal axis;
- a plurality of disks attached to the turbine shaft at spaced intervals;
- a plurality of turbine blade rows fastened to the plurality of disks;
- and
- an exhaust system comprising:
- an annular diffuser comprising:
- a hub portion surrounding the turbine shaft;
- and
- an outer cone having a substantially frusto-conical shape that is radially symmetrical about a central longitudinal axis thereof that is tilted relative to the turbine shaft;
- and
- a collector having an inlet extending from the annular diffuser and an outlet, the collector configured to include a turn that causes the collector to turn exhaust gases 90° from the longitudinal axis of the turbine shaft,
- wherein the outer cone of the annular diffuser is tilted in a direction of the turn of the collector.
A method of exhausting gases from a turbine comprising the steps of:
- positioning an annular diffuser adjacent to a final stage of the turbine, the diffuser comprising:
- a hub portion surrounding a turbine shaft, the turbine shaft having a central longitudinal axis;
- and
- an outer cone having a substantially frusto-conical shape that is radially symmetrical about a central longitudinal axis thereof that is tilted relative to the turbine shaft;
- positioning a collector adjacent to the annular diffuser with an inlet extending from the annular diffuser and an outlet, the collector configured to include a turn that causes the collector to turn exhaust gases about 90° from the longitudinal axis of the turbine shaft;
- and
- tilting the outer cone of the annular diffuser in a direction of the turn of the collector.
Dependencies are inferred from the claim text.