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 with respect to a rotation direction of the second rotor;
- there being a coupling connecting the first and second rotors for rotation together, the coupling mounted in a first journal within a bearing;
- and
- the first pre-pressurization passage extending through the 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 with respect to a rotation direction of each of the first and second rotors.
Dependencies are inferred from the claim text.