Dual vane pump with pre-pressurization passages
AssigneeHamilton Sundstrand Corporation
InventorsEdward W. Goy, Timothy J. Franckowiak
Life of this patent
Estimating the term…
Abstract
A dual vane pump system includes first and second vane pumps having first and second rotors with a plurality of vanes moving radially inwardly and outwardly of the first and second rotors, and into contact with an inner surface of the first and second outer liners. A first pre-pressurization passage connects a first pump inlet in the first pump that is at discharge pressure to a second pump outlet in the second pump which is upstream of the second discharge opening. There is a coupling connecting the first and second rotors for rotation together. The pre-pressurization passage extending through the bearing.
Claims20
A dual vane pump system comprising:
- a first vane pump having a first outer liner, a first rotor with a first plurality of vanes moving radially inwardly and outwardly of the first rotor, and into contact with an inner surface of the first outer liner, the first vane pump having a first suction opening extending through the first outer liner and a first discharge opening extending through the first outer liner;
- a second vane pump having a second outer liner, a second rotor with a second plurality of vanes moving radially inwardly and outwardly of the second rotor, and into contact with an inner surface of the second outer liner, the second vane pump having a second suction opening extending through the second outer liner and a second discharge opening extending through the second outer liner;
- a first pre-pressurization passage connecting a first pump inlet in the first pump that is at a discharge pressure to a second pump outlet in the second pump which is upstream of the second discharge opening;
- there being a coupling connecting the first and second rotors for rotation together, the coupling mounted in a first journal within the bearing;
- and
- the first pre-pressurization passage extending through the first bearing.
A dual vane pump system comprising:
- a first vane pump having a first outer liner, a first rotor with a first plurality of vanes moving radially inwardly and outwardly of the first rotor, and into contact with an inner surface of the first outer liner, the first vane pump having a suction opening extending through the first outer liner and a first discharge opening extending through the first outer liner;
- a second vane pump having a second outer liner, a second rotor with a second plurality of vanes moving radially inwardly and outwardly of the second rotor, and into contact with an inner surface of the second outer liner, the second vane pump having a first suction opening extending through the second outer liner and a second discharge opening extending through the second outer liner;
- and
- wherein a pre-pressurization passage connects an inlet at a discharge pressure in each of the first and second pumps with an outlet upstream of the discharge opening in the other of the first and second pumps.
Dependencies are inferred from the claim text.