Variable area diffuser

A variable area diffuser comprising:

• a backing plate and a shroud spaced apart from the backing plate;
• a vane arranged between the backing plate and shroud, the vane adjustable between multiple positions, the vane including an aperture;
• structure extending from the backing plate towards the shroud through the aperture;
• wherein the vane includes a hole, and a pivot pin arranged within the hole, the hole spaced from the aperture, the vane rotatable about the pivot pin between the multiple positions;
• wherein the structure includes a protrusion integral with the backing plate;
• and
• wherein the structure includes a fastener extending through the aperture proximate to the protrusion, said fastener is non-coaxial to said protrusion.

A variable area diffuser comprising:

• a backing plate and a shroud spaced apart from the backing plate;
• a vane arranged between the backing plate and shroud, the vane adjustable between multiple positions, the vane including an aperture;
• structure extending from the backing plate towards the shroud through the aperture;
• wherein the vane includes a hole, and a pivot pin arranged within the hole, the hole spaced from the aperture, the vane rotatable about the pivot pin between the multiple positions;
• and
• wherein a drive ring having a drive pin rotates the vane about the pivot pin, the drive pin received in a slot in the vane.

A compressed air unit comprising:

• a housing having a shroud;
• a compressor arranged in the housing and including rotor blades;
• a variable area diffuser arranged in the housing and in fluid communication with the rotor blades, the diffuser including multiple vanes arranged circumferentially and outward of the rotor blades, the vanes rotatable about pivot pins between multiple positions, a mounting plate secured to the housing and supporting a backing plate, the vanes arranged between the backing plate and the shroud;
• and
• wherein the mounting plate includes bosses, and the vanes include holes, pivot pins extending from the shroud though the holes and into the bosses.

A compressed air unit comprising:

• a housing having a shroud;
• a compressor arranged in the housing and including rotor blades;
• a variable area diffuser arranged in the housing and in fluid communication with the compressor rotor blades, the diffuser including multiple vanes arranged circumferentially and outward of the rotor blades, the vanes rotatable about pivot pins between multiple positions, a mounting plate secured to the housing and supporting a backing plate, the vanes arranged between the backing plate and the shroud;
• and
• wherein a drive ring is supported by the housing on a bearing, the drive ring including drive pins received by slots in the vanes, and an actuator is operatively connected to the drive ring for moving the vanes between the multiple positions.