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US 11,525,464 B2Granted
Rotor with centrifugally wedged damper
AssigneePratt & Whitney Canada Corp.
InventorMaksim Pankratov
Life of this patent
Estimating the term…
Abstract
A gas turbine engine rotor having an axis, comprising: a body about the axis having an inner surface, a seat having an outer seat edge at a first radial location surrounded by the inner surface at a second radial location, a lip along the inner surface having an inner lip edge spaced axially away from the seat to define a gap, the lip at a rated axial location between the inner lip edge and the seat facing toward the seat at a normal angle; a damper in the gap having first and second damper surfaces, the first damper surface adjacent the seat; and a split ring in the gap adjacent the second damper surface, having an outer ring edge spaced from the inner surface, engaging the lip at the rated axial location and resiliently expandable against the lip deflects the split ring to load the damper against the seat.
Claims20
A gas turbine engine rotor having a rotation axis, the gas turbine engine rotor comprising:
- a body rotatable about the rotation axis, the body having an inner body surface radially inward relative to the rotation axis, a seat axially inward the body relative to the rotation axis, the seat having an outer seat edge at a first radial location of the body relative to the rotation axis, the outer seat edge surrounded by the inner body surface at a second radial location of the body, the body including a lip extending circumferentially along the inner body surface, the lip having an inner lip edge spaced axially away from the seat so as to define an axial gap between the seat and the lip, the lip at a rated axial location of the body between the inner lip edge and the seat facing toward the seat at a normal angle relative to the rotation axis;
- a damper disposed about the rotation axis in the axial gap, the damper having axially opposite first and second damper surfaces, the first damper surface adjacent to the seat;
- and
- a split ring disposed about the rotation axis in the axial gap adjacent to the second damper surface, the split ring having an outer ring edge radially outward relative to the rotation axis and spaced radially inwardly from the inner body surface, the split ring radially engaging the lip at the rated axial location and resiliently expandable radially outwardly under centrifugal load relative to the rotation axis such that expanding the split ring radially against the lip axially deflects the split ring toward the seat so as to axially load the damper against the seat;
- wherein the damper has lugs defined axially between the first damper surface and the second damper surface and extending radially from radially inward of the inner lip edge to radially outward of the inner lip edge relative to the rotation axis, and the body defines axial passages defined inward a side of the body to the seat across the lip, the axial passages sized and arranged complementarily to the lugs such that the lugs are slidable across the lip as the damper is slid axially from outward of the side of the body to inside the axial gap.
2 more elements
A gas turbine engine rotor defining a rotation axis, the rotor comprising:
- a body rotatable about the rotation axis, the body having an inner body surface radially inward relative to the rotation axis, a seat axially inward the body relative to the rotation axis, the seat having an outer seat edge at a first radial location of the body relative to the rotation axis, the outer seat edge surrounded by the inner body surface at a second radial location of the body relative to the rotation axis, the body having a conical ramping surface about the rotation axis tapering radially inwardly from an outer ramp edge of the conical ramping surface to an inner ramp edge of the conical ramping surface located radially inward of the first radial location, the inner ramp edge spaced axially away from the seat so as to define an axial gap between the seat and the conical ramping surface;
- a damper disposed about the rotation axis in the axial gap, the damper having axially opposite first and second damper surfaces, the first damper surface adjacent to the seat;
- and
- a split ring disposed about the rotation axis in the axial gap adjacent to the second damper surface, the split ring radially engaging the conical ramping surface radially inward of the outer ramp edge, the split ring resiliently expandable radially outwardly under centrifugal load relative to the rotation axis such that radially loading the split ring against the conical ramping surface axially loads the split ring against the damper toward the seat;
- wherein the damper has lugs defined axially between the first damper surface and the second damper surface and extending radially from radially inward of the inner ramp edge to radially outward of the inner ramp edge relative to the rotation axis, and the conical ramping surface is defined by a lip of the body projecting radially inwardly from the inner body surface, the body defining axial passages extending inward a side of the body to the seat across the lip, the axial passages sixed and arranged complementarily to the lugs such that the lugs are slidable across the lip as the damper is slid axially from outward of the side of the body to inside the axial gap.
2 more elements
A gas turbine engine rotor having a rotation axis, the gas turbine engine rotor comprising:
- a body rotatable about the rotation axis, the body having an inner body surface radially inward relative to the rotation axis, a seat axially inward the body relative to the rotation axis, the seat having an outer seat edge at a first radial location of the body relative to the rotation axis, the outer seat edge surrounded by the inner body surface at a second radial location of the body, the body including a lip extending circumferentially along the inner body surface, the lip having an inner lip edge spaced axially away from the seat so as to define an axial gap between the seat and the lip, the lip at a rated axial location of the body between the inner lip edge and the seat facing toward the seat at a normal angle relative to the rotation axis;
- a damper disposed about the rotation axis in the axial gap, the damper having axially opposite first and second damper surfaces, the first damper surface adjacent to the seat;
- and
- a split ring disposed about the rotation axis in the axial gap adjacent to the second damper surface, the split ring having an outer ring edge radially outward relative to the rotation axis and spaced radially inwardly from the inner body surface, the split ring radially engaging the lip at the rated axial location and resiliently expandable radially outwardly under centrifugal load relative to the rotation axis such that expanding the split ring radially against the lip axially deflects the split ring toward the seat so as to axially load the damper against the seat;
- wherein the lip is a detachable portion of the body received by the inner body surface and fastenable in position relative to the inner body surface upon the damper being adjacent to the seat, the split ring being adjacent to the damper and the lip being adjacent to the split ring.
2 more elements
Dependencies are inferred from the claim text.