Motorized compressor device with air bearing having reduced axial and radial stack-up

A turbomachine comprising:

• a housing assembly including a first housing member having a shroud surface, a second housing member, and a bearing housing;
• a rotating group disposed at least partly within the second housing member, the rotating group having a wheel that opposes the shroud surface to define a fluid gap therebetween;
• a bearing at least partly housed by the bearing housing, the bearing supporting rotation of the rotating group about an axis of rotation;
• wherein the first housing member has a first axial surface and the bearing housing has a second axial surface that is flush with the first axial surface;
• wherein the second housing member has a third axial surface facing in an axial direction opposite that of the first and second axial surfaces;
• wherein the first housing member has a first radial surface and the bearing housing has a second radial surface, the first and second radial surfaces facing in opposing radial directions relative to the axis of rotation;
• wherein the bearing housing includes an outer radial edge flange that includes the second axial surface and the second radial surface, the outer radial edge flange disposed axially between the first housing member and the second housing member;
• and
• wherein the first housing member and the bearing housing are attached to the second housing member with the fluid gap defined between the wheel and the shroud surface, the first and second axial surfaces abutting against the third axial surface, and the first radial surface abutting against the second radial surface;
• wherein the second housing member defines an interior space and an end opening that provides access to the interior space, a motor is disposed within the interior space and configured to drivingly rotate the rotating group about the axis of rotation, and the bearing housing at least partly covers over the end opening of the second housing member;
• and
• wherein the bearing is an air bearing with a thrust disc and a journal housing, the bearing housing includes a recess that receives the thrust disc and a base side projection that supports the journal housing, and a thrust cover is attached to the bearing housing to cover over the thrust disc within the recess.