Cavitation resistant gear driven fuel pump
AssigneeHamilton Sundstrand Corporation
InventorsSteven Poteet, Blair A. Smith, Kevin M. Rankin
Life of this patent
Estimating the term…
Abstract
A gear pump for a gas turbine engine including a first gear having a plurality of gear teeth supported for rotation on a gear shaft relative to a second gear, wherein the gear teeth are formed from a steel base material and surfaces of the gear teeth are coated with a cavitation resistant coating material, and a journal bearing for carrying a gear shaft load through a fluid film pressure between a surface of the gear shaft and a surface of the journal bearing, wherein at least a portion of the journal bearing is formed from a cavitation resistant base material.
Claims15
A gear pump, comprising:
- a) a first gear having a plurality of gear teeth supported for rotation on a gear shaft relative to a second gear, wherein the gear teeth are formed from a steel base material and surfaces of the gear teeth are coated with a cavitation resistant coating material;
- and
- b) a journal bearing for carrying a gear shaft load by way of a fluid film between a first surface of the gear shaft and a second surface of the journal bearing, wherein at least a portion of the journal bearing is formed from a cavitation resistant base material.
A gear pump for a gas turbine engine, comprising:
- a) a drive gear having a plurality of driving gear teeth supported for rotation on a first gear shaft relative to a driven gear having a plurality of driven gear teeth supported on a second gear shaft, wherein the gear teeth of the drive gear and the gear teeth of the driven gear are formed from a steel base material and surfaces of the gear teeth are coated with a vapor-deposited cavitation resistant coating;
- and
- b) a plurality of journal bearings for respectively carrying gear shaft loads of the drive gear and the driven gear through a fluid film pressure between a surface of a gear shaft and a surface of a journal bearing, wherein at least a portion of one of the plurality of journal bearings is formed from an aluminum (Al) bronze cavitation resistant base material.
Dependencies are inferred from the claim text.