Reduction of cavitation in fuel pumps
AssigneeHamilton Sundstrand Corporation
InventorsSteven POTEET, Blair A. SMITH
Life of this patent
Estimating the term…
Abstract
A fluid gear pump gear arranged to rotate about a first axis. The fluid gear pump gear includes a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first hub portion and the first teeth being coated with a vapor-deposited of cavitation resistant coating. The gear also includes a first shaft on which the first hub portion is carried.
Claims16
A fluid gear pump comprising:
- a first gear constructed and arranged to rotate about a first axis, the first gear including a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first teeth being coated with a vapor-deposited of cavitation resistant coating;
- a second gear operably coupled to the first gear for rotation about a second axis, the second gear including a concentrically disposed second hub portion and a plurality of second teeth radially projecting and circumferentially spaced about the second hub portion, wherein at a time in operation the plurality of first teeth and the plurality of second teeth contact at first contact point and a second contact point to create a backlash volume interposed between the first contact point and the second contact point;
- a first bearing abutting and coaxial to the first hub portion;
- and
- a second bearing abutting and coaxial to the second hub portion.
A method of reducing cavitation during fluid gear pump operation, the method comprising:
- rotating a first gear around first axis, the first gear including a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, wherein the first teeth are coated with a vapor-deposited of cavitation resistant coating;
- rotating a second gear coupled to the first gear about a second axis, the second gear including a concentrically disposed second hub portion and a plurality of second teeth radially projecting and circumferentially spaced about the second hub portion, wherein the plurality of first teeth engage the plurality of second teeth;
- and
- transferring fluid from a low pressure side to a high pressure side when the first gear is rotating and the second gear is rotating.
A fluid gear pump gear arranged to rotate about a first axis, the fluid gear pump gear comprising:
- a concentrically disposed first hub portion and a plurality of first teeth radially projecting and circumferentially spaced about the first hub portion, the first hub portion and the first teeth being coated with a vapor-deposited of cavitation resistant coating;
- and
- a first shaft on which the first hub portion is carried
Dependencies are inferred from the claim text.