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US 12,595,747 B2Granted
Method of mitigating vibrations in a seal component
AssigneePratt & Whitney Canada Corp.
InventorIgnatius Theratil
Life of this patent
Estimating the term…
Abstract
A method of mitigating vibrations of a seal component of a bearing cavity, the method includes: injecting gas jets into the bearing cavity to disrupt vortices causing the vibrations of the seal component, the vortices having a frequency and an amplitude, the gas jets one or more of: decreasing the amplitude of the vortices; and modifying the frequency of the vortices to be offset from a natural frequency of the seal component.
Claims20
A method of mitigating vibrations of a seal component of a seal of a bearing cavity, the method comprising:
- limiting oil leakage out of the bearing cavity by introducing air into the bearing cavity through the seal;
- injecting gas jets into the bearing cavity to disrupt vortices causing the vibrations of the seal component, the vortices having a frequency and an amplitude, including injecting the gas jets into the bearing cavity independently of the air introduced into the bearing cavity through the seal, the gas jets one or more of:
- decreasing the amplitude of the vortices;
- and
- modifying the frequency of the vortices to be offset from a natural frequency of the seal component.
2 more elements
An aircraft engine, comprising:
- a shaft rotatable about a central axis;
- a bearing housing extending around the shaft and defining a bearing cavity, the bearing cavity containing a bearing;
- a seal disposed radially between the shaft and the bearing housing, the seal having a static component mounted to the bearing housing and a rotating component mounted to the shaft, a gap defined between the rotating component and the static component, the gap fluidly connecting a volume on a first side of the seal to the bearing cavity on a second side of the seal, the bearing cavity in fluid communication with a source of compressed air via the gap for limiting oil leakage out of the bearing cavity;
- a gas source at a pressure greater than a pressure inside the bearing cavity;
- and
- nozzles distributed circumferentially around the central axis and fluidly connecting the gas source to the bearing cavity proximate the seal and independently of the gap, the nozzles having outlets located on the second side of the seal and exposed to the bearing cavity and injecting jets of a gas from the gas source into the bearing cavity, the nozzles being defined through the bearing housing.
3 more elements
Dependencies are inferred from the claim text.