Clearance control system for a rotary machine and method of controlling a clearance

摘要

A clearance control system for a rotary machine includes an outer casing including an outer casing main portion having a first radial thickness, wherein the outer casing is configured to expand at a first time rate of thermal expansion. Also included is an inner casing disposed between the outer casing and a rotary portion, the inner casing including an inner casing main portion having a second radial thickness that is less than the first radial thickness, wherein the inner casing is configured to expand at a second time rate of thermal expansion that is greater than the first time rate of thermal expansion of the outer casing. Further included is an inner casing leg configured to separate from an outer casing leg during expansion of the inner casing and configured to engage the outer casing leg during contraction of the inner casing.

主权项

1. A clearance control system for a rotary machine comprising:
an outer casing including an outer casing main portion having a first radial thickness, wherein the outer casing is configured to expand at a first time rate of thermal expansion, the outer casing comprising at least outer casing two legs each extending in the same first direction; an inner casing disposed between the outer casing and a rotary portion, the inner casing including an inner casing main portion having a second radial thickness that is less than the first radial thickness, wherein the inner casing is configured to expand at a second time rate of thermal expansion that is greater than the first time rate of thermal expansion of the outer casing the inner casing comprising at least inner casing two legs each extending in the same second direction, where the first direction is oppositely oriented and opposed from the second direction; and the at least inner casing two legs configured to separate from the at least outer casing two legs during expansion of the inner casing and configured to engage the at least outer casing two legs during contraction of the inner casing.