Damper ring
AssigneePratt & Whitney Canada Corp.
InventorMAKSIM PANKRATOV
Life of this patent
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Abstract
A damper ring is mounted in frictional engagement with a radially inwardly facing surface of a circumferential groove defined in a rotary part of a gas turbine engine. Energy dissipation is provided via sliding friction of the ring in the groove. The damper ring has a circumferentially segmented ring body having a non-uniform circumferential stiffness around its circumference including a locally reduced stiffness in a circumferential direction between each pair of circumferentially adjacent ring segments.
Claims20
A damper ring adapted to be mounted in frictional engagement with a radially inwardly facing surface of a circumferential groove defined in a rotary part of a gas turbine engine for providing vibration damping by friction forces;
- the damper ring comprising:
- a circumferentially segmented ring body having a non-uniform circumferential stiffness around its circumference including a locally reduced stiffness between each pair of circumferentially adjacent ring segments.
A gas turbine engine rotor mounted for rotation about an axis, the rotor comprising:
- a body defining a circumferentially extending groove for receiving a damper ring, the damper ring having an outer diameter engageable, when centrifugally loaded, in friction engagement with a radially inwardly facing surface of the circumferentially extending groove to provide energy dissipation by friction, the damper ring being circumferentially segmented into a plurality of ring segments, the ring segments being retained on an inner diameter of the damper ring by a circumferentially extending lip projecting from the body of the rotor, and wherein circumferentially spaced-apart lugs are provided on at least one of the ring segments and the circumferentially extending lip of the rotor to axially retain the ring segments in the circumferentially extending groove.
A friction damper for frictional engagement with a radially inwardly facing surface of a circumferential groove defined in a rotary part of a gas turbine engine in order to provide energy dissipation by friction forces, the friction damper comprising:
- a damper ring having a discontinuous circumferential stiffness around its circumference, the damper ring including a plurality of ring segments, wherein at location between adjacent ring segments, the stiffness of the damper ring in a circumferential direction is less than that of each of the ring segments.
Dependencies are inferred from the claim text.