초록 ▼

A dual lobe, split ring, variable displacement roller vane pump is provided for supplying an aircraft engine varying amount of fuel. In a preferred application, the pump is used with a gas turbine engine. The pump includes a housing having an inlet and an outlet, a rotor rotatably mounted within the

A dual lobe, split ring, variable displacement roller vane pump is provided for supplying an aircraft engine varying amount of fuel. In a preferred application, the pump is used with a gas turbine engine. The pump includes a housing having an inlet and an outlet, a rotor rotatably mounted within the housing and having a plurality of slots, and a plurality of roller vanes operatively mounted within the slots. The pump further includes a pair of port plates mounted on either side of the rotor and two cam segments received around the rotor. The cam segments each have a curvilinear surface for cooperating with the rotor, the port plates, and the roller vanes to define a plurality of pumping chambers. The cam segments are independently movable to create varying volumetric pumping chambers along the curvilinear surface of the cam segments.

대표청구항 ▼

1. A variable displacement vane pump, comprising:a housing: a rotor received within the housing for rotation about a center of rotation, the rotor having a plurality of slots that each receive a support shoe; a plurality of vanes operatively mounted within the slots of the rotor with each vane engag

1. A variable displacement vane pump, comprising:a housing: a rotor received within the housing for rotation about a center of rotation, the rotor having a plurality of slots that each receive a support shoe; a plurality of vanes operatively mounted within the slots of the rotor with each vane engaging a support shoe first and second cam segments each operatively mounted within the housing and independently movable relative to the rotor to create varying volumetric pumping chambers; an inlet provided in the housing for introducing fluid into the plurality of pumping chambers; an outlet provided in the housing for discharging fluid from the plurality of pumping chambers; and a hydrostatic pad in each shoe that supports a vane hydraulic pressure load.