Rotor for a positive displacement compressor
AssigneeGM Global Technology Operations LLC
InventorsTyson W. Brown, Anil K. Sachdev, Carnell E. Williams
Life of this patent
Estimating the term…
Abstract
A rotor for a positive displacement compressor assembly having a housing defining an inlet, an outlet, and a rotor cavity in communication with the inlet and the outlet. The rotor may comprise a rotor body and a porous inner core enclosed within the rotor body. The rotor may comprise a tapered rotor body having an outer radius that decreases from a first end to a second end thereof. In one form, the positive displacement compressor assembly may comprise a supercharger assembly for an internal combustion engine.
Claims16
A rotor for a positive displacement compressor assembly having a housing defining an inlet, an outlet, and a rotor cavity in communication with the inlet and the outlet, the rotor comprising:
- a rotor body having a central longitudinal axis, a first end adjacent the inlet of the housing, a second end adjacent the outlet of the housing, an axially extending hub, and a plurality of lobes extending radially outward from the hub and axially along the hub from the first end to the second end of the rotor body,
- wherein the rotor body comprises a solid outer casing and a porous inner core enclosed within the solid outer casting,
- wherein the porous inner core extends between the first end and the second end of the rotor body, and
- wherein the rotor body has an outer radius, and wherein the outer radius of the rotor body at the first end thereof is greater than the outer radius of the rotor body at the second end thereof.
A positive displacement compressor assembly comprising:
- a housing defining an inlet and an outlet, the housing including a pair of end walls and a pair of intersecting sidewalls having inner wall surfaces that define first and second interconnected rotor cavities;
- first and second shafts extending within the rotor cavities and supported for rotation at the end walls;
- and
- a pair of intermeshing first and second rotors respectively supported within the first and second rotor cavities by the first and second shafts,
- wherein the first and second rotors respectively comprise first and second rotor bodies having respective first and second central longitudinal axes, respective first ends adjacent the inlet of the housing, and respective second ends adjacent the outlet of the housing,
- wherein each of the first and second rotor bodies has a first end face, an opposite second end face, an axially extending hub coupled to one of the shafts for rotation therewith, and a plurality of lobes extending radially outward from the hub and axially along the hub from the first end face to the second end face thereof,
- wherein a porous inner core is enclosed within each of the first and second rotor bodies, and
- wherein the first and second rotor cavities are frustoconical in shape.
A positive displacement compressor assembly comprising:
- a housing defining an inlet and an outlet, the housing including a pair of end walls and a pair of intersecting sidewalls having inner wall surfaces that define first and second interconnected rotor cavities;
- first and second shafts extending within the rotor cavities and supported for rotation at the end walls;
- and
- a pair of intermeshing first and second rotors respectively supported within the first and second rotor cavities by the first and second shafts,
- wherein the first and second rotors respectively comprise first and second rotor bodies having respective first and second central longitudinal axes, respective first ends adjacent the inlet of the housing, and respective second ends adjacent the outlet of the housing,
- wherein each of the first and second rotor bodies has a first end face, an opposite second end face, an axially extending hub coupled to one of the shafts for rotation therewith, and a plurality of lobes extending radially outward from the hub and axially along the hub from the first end face to the second end face thereof,
- wherein a porous inner core is enclosed within each of the first and second rotor bodies, and
- wherein the first and second central longitudinal axes of the first and second rotor bodies approach each other as the rotor bodies extend from the inlet to the outlet of the housing and form an acute angle therebetween.
Dependencies are inferred from the claim text.