Mass offset for damping performance
First Claim
Patent Images
1. A gas turbine engine rotor assembly comprising:
- a plurality of blades spaced apart from each other for rotation about an axis, each of the blades including a platform having an inner surface and an outer surface, and wherein adjacent platforms are separated from each other by a gap; and
a damper defined by a center of mass and positioned to have an outer surface that abuts directly against the inner surfaces of the adjacent platforms across the gap, and wherein a first portion of the outer surface of the damper contacts the inner surface of one of the adjacent platforms at a first edge of the gap and a second portion of the outer surface of the damper contacts the inner surface of the other of the adjacent platforms at a second edge of the gap that is opposite of the first edge of the gap such that the damper is in contact with the first and second edges while extending across the gap, and wherein the center of mass of the damper is aligned with the gap between adjacent platforms and is positioned closer to one of the adjacent platforms than the other of the adjacent platforms, and wherein the center of mass is offset from a centerline of the gap between adjacent platforms.
3 Assignments
0 Petitions
Accused Products
Abstract
A gas turbine engine rotor assembly includes a plurality of blades spaced apart from each other for rotation about an axis. Each of the blades includes a platform having an inner surface and an outer surface. Adjacent platforms are separated from each other by a gap. A damper is positioned at an offset position within the gap to contact the inner surfaces of the adjacent platforms.
-
Citations
24 Claims
-
1. A gas turbine engine rotor assembly comprising:
-
a plurality of blades spaced apart from each other for rotation about an axis, each of the blades including a platform having an inner surface and an outer surface, and wherein adjacent platforms are separated from each other by a gap; and a damper defined by a center of mass and positioned to have an outer surface that abuts directly against the inner surfaces of the adjacent platforms across the gap, and wherein a first portion of the outer surface of the damper contacts the inner surface of one of the adjacent platforms at a first edge of the gap and a second portion of the outer surface of the damper contacts the inner surface of the other of the adjacent platforms at a second edge of the gap that is opposite of the first edge of the gap such that the damper is in contact with the first and second edges while extending across the gap, and wherein the center of mass of the damper is aligned with the gap between adjacent platforms and is positioned closer to one of the adjacent platforms than the other of the adjacent platforms, and wherein the center of mass is offset from a centerline of the gap between adjacent platforms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A gas turbine engine rotor assembly comprising:
-
a rotor disk defining an axis of rotation; a plurality of blades supported by the rotor disk and spaced apart from each other for rotation about the axis of rotation, the plurality of blades including at least a first blade having a first platform and a second blade having a second platform separated from the first platform by a gap, and wherein each of the first and second platforms includes an inner surface and an outer surface; and a damper defined by a center of mass and positioned to have an outer surface that abuts directly against the inner surfaces of the first and second platforms across the gap such that the center of mass is aligned with the gap between the first and second platforms and is positioned closer to one of the first and second platforms than the other of the first and second platforms so that the damper provides an unequal load split between the first and second blades, and wherein a first portion of the outer surface of the damper contacts the inner surface of one of the first and second platforms at a first edge of the gap and a second portion of the outer surface of the damper contacts the inner surface of the other of the first and second platforms at a second edge of the gap that is opposite of the first edge of the gap such that the damper is in contact with the first and second edges while extending across the gap, and wherein the center of mass is offset from a centerline of the gap between the first and second platforms. - View Dependent Claims (10, 11, 12, 13, 14, 15, 21, 22)
-
-
16. A gas turbine engine comprising:
-
a compressor section; and a turbine section downstream of the compressor section, the turbine section including at least one turbine stage having a rotor disk defining an axis of rotation; a plurality of blades supported by the rotor disk and spaced apart from each other for rotation about the axis of rotation, the plurality of blades including at least a first blade having a first platform and a second blade having a second platform separated from the first platform by a gap, and wherein each of the first and second platforms includes an inner surface and an outer surface; and a damper defined by a center of mass and positioned to have an outer surface that abuts directly against the inner surfaces of the first and second platforms across the gap, and wherein the center of mass of the damper is aligned with the gap between the first and second and is positioned closer to one of the first and second platforms than the other of the first and second platforms, and wherein the inner surfaces of the first and second platforms comprise contact surfaces that extend in a common direction such that a first portion of the outer surface of the damper contacts the contact surface of one of the first and second platforms at a first edge of the gap and a second portion of the outer surface of the damper contacts the contact surface of the other of the first and second platforms at a second edge of the gap that is opposite of the first edge of the gap such that the damper is in contact with the first and second edges while extending across the gap. - View Dependent Claims (17, 18, 19, 20, 23, 24)
-
Specification