Mid turbine frame system for gas turbine engine
AssigneePratt & Whitney Canada Corp.
InventorsEric DUROCHER, John PIETROBON
Life of this patent
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Abstract
A gas turbine engine mid turbine frame apparatus includes a an inner case supporting a bearing, an outer case to which the inner case is mounted, and an apparatus for radially positioning one relative to the other, the apparatus including a plurality of radial locators extending outwardly of the outer case and an associated locking apparatus. The locking apparatus is mounted adjacent to but independent of the locators and provides for anti-rotation of the radial locators once installed.
Claims14
A gas turbine engine having a mid turbine frame, the mid turbine frame comprising:
- an outer case, an inner case, at least three spokes extending radially between the inner and outer cases, and a gas path defined through the mid turbine frame, the gas path disposed between the inner and outer cases, the inner case supporting at least one main shaft bearing, the inner case radially adjustably mounted to the outer case via the spokes;
- a radial positioning apparatus mounted to the outer case, the apparatus including at least three radial locators threadedly mounted to the outer case and having a terminal portion extending radially outwardly of the outer case, the radial locators configured to adjust the radial position of the inner case relative to the outer case when the radial locators are threadingly adjusted relative to the outer case;
- and
- a locking apparatus associated with each radial locator, the locking apparatus mounted to an outer surface of the outer case by a fastening apparatus independent of the radial locator, the locking apparatus including at least one keying surface keyed to a corresponding surface on the terminal portion of the radial locator, said keying and corresponding surfaces cooperating to impede rotation of the radial locator when the locking apparatus is mounted to the outer case.
A gas turbine engine having a mid turbine frame, the mid turbine frame comprising:
- an outer case, an inner case, at least three spokes extending radially between the inner and outer cases, and a gas path defined through the mid turbine frame, the gas path disposed between the inner and outer cases, the inner case supporting at least one main shaft bearing, the inner case radially adjustably mounted to the outer case via the spokes;
- a radial positioning apparatus mounted to the outer case, the apparatus including plurality of radial locators threadedly mounted to the outer case and having a terminal portion extending radially outwardly of the outer case, the radial locators configured to adjust the radial position of the inner case relative to the outer case when the radial locators are threadingly adjusted relative to the outer case;
- and
- a locking apparatus associated with each radial locator, the locking apparatus mounted to an outer surface of the outer case by a fastening apparatus independent of the radial locator, the locking apparatus including a pair of flats cooperating with a mating pair of flats on the terminal portion of the radial locator.
Dependencies are inferred from the claim text.