Tip treatment bar with a damping material
AssigneeROLLS-ROYCE plc
InventorBrynley Clark
Life of this patent
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Abstract
A tip treatment bar (16) for use in a gas turbine engine casing is provided with a cavity which is open on one side of the bar (16), the cavity being filled with a damping material (24). The bars (16) may be open ended. The damping material (24) reduces vibration amplitudes in the bar (16) caused by aerodynamic excitation, thus reducing high cycle fatigue of the tip treatment bars (16).
Claims13
A tip treatment bar for use in a gas turbine engine casing, the bar comprising:
- oppositely disposed ends;
- a channel extending between the oppositely disposed ends and the channel having an opening between the oppositely disposed ends;
- and
- a damping material housed within the channel.
A tip treatment assembly comprising a plurality of tip treatment bars disposed in a circumferentially extending array, each tip treatment bar comprising:
- oppositely disposed ends;
- an axial side extending lengthwise between the oppositely disposed ends;
- and
- a cavity which is open at the side of the bar between the oppositely disposed end;
- and
- a damping material provided in the cavity.
In a gas turbine engine, a tip treatment assembly comprising:
- oppositely disposed end supports;
- a plurality of tip treatment bars supported at and disposed in a circumferentially extending array, each tip treatment bar comprising:
- oppositely disposed ends of the plurality of tip treatment bars are supported by the respective end supports;
- a side surface facing radially outwardly with respect to the circumferentially extending array;
- a cavity which opens at the side surface;
- and
- a damping material provided in the cavity.
Dependencies are inferred from the claim text.