Patent ID: 11885352
Assignee: HAMILTON SUNDSTRAND CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A compressor comprising:
a compressor housing comprising:
an inlet;
an outlet; and
a duct connecting the inlet to the outlet;

an impeller within the duct in the compressor housing; and
a variable channel diffuser within the duct and downstream from the impeller, the channel diffuser comprising:
a shroud;
a backing plate;
a channel plate adjacent to the backing plate such that the channel plate is between the shroud and the backing plate;
a floor plate adjacent to the shroud such that the floor plate is between the shroud and the divider plate, wherein the floor plate is movable relative to the divider plate;
a floor cavity defined by the floor plate and the shroud, wherein air at servo pressure is supplied to the floor cavity wherein a servo pressure source is configured to provide air at servo pressure to move the floor plate relative to the divider plate, and wherein the air at servo pressure is a mixture of ambient pressure air and compressed pressure air mixed by a servo pressure source upstream from the floor cavity;
a plurality of standoffs formed on the floor plate; and
a plurality of recessed areas formed in the channel plate, wherein a standoff of the plurality of standoffs and a recessed area of the plurality of recessed areas define a channel for fluid flow, each channel having an area which is variable through movement of the floor plate relative to the channel plate.