Scroll assemblies and compressors including the same

A scroll assembly mounted in a main bearing housing, the scroll assembly comprising:

• a non-orbiting scroll including a non-orbiting spiral wrap;
• an orbiting scroll including an orbiting spiral wrap and a cylindrical hub oppositely positioned from the orbiting spiral wrap;
• a coupling positioned between the orbiting scroll and a fixed component and movable relative to at least one of the orbiting scroll and the fixed component, wherein the fixed component is fixed in both an axial and a radial direction;
• and
• a first seal sealingly engaged with the orbiting scroll and the coupling, a second seal sealingly engaged with the coupling and the main bearing housing, and a third seal sealingly engaged with the cylindrical hub and the main bearing housing,
• wherein at least the main bearing housing and the orbiting scroll define a pressure cavity.

A compressor comprising:

• a shell;
• a main bearing housing positioned within the shell, the main bearing housing comprising:
• a first cavity;
• and
• a primary bearing positioned within a second cavity positioned opposite the first cavity;
• a scroll assembly positioned within the shell and positioned relative to the first cavity of the main bearing housing, the scroll assembly comprising:
• a non-orbiting scroll including a non-orbiting spiral wrap;
• an orbiting scroll including an orbiting spiral wrap and a cylindrical hub oppositely positioned from the orbiting spiral wrap, the cylindrical hub defines a first opening including a drive bearing positioned therein;
• and
• a coupling positioned between the orbiting scroll and a fixed component and movable relative to at least one of the orbiting scroll and the fixed component, wherein the fixed component is fixed in both an axial and a radial direction;
• a drive shaft axially positioned relative to the first cavity and the second cavity of the main bearing housing, the drive shaft including a driveshaft body and an eccentric body, the eccentric body positioned within the first opening and drivingly engaged with the drive bearing of the orbiting scroll;
• and
• a plurality of seals positioned relative to the scroll assembly and the main bearing housing, wherein the plurality of seals isolate a pressure cavity defined by at least the orbiting scroll and the main bearing housing, the plurality of seals including a first seal sealingly engaged with the orbiting scroll and the coupling.