Lightweight compressor crankcase assembly and method

A compressor crankcase assembly, comprising:

• a crankcase made of a first material comprising at least 50% by weight aluminum;
• a crankcase liner disposed within the crankcase and having a groove along an outer surface of the crankcase liner;
• a protrusion of the crankcase that is at least partially disposed within the groove of the crankcase liner;
• and
• wherein the protrusion of the crankcase is a heat formed protrusion disposed along the inner surface of the crankcase.

A compressor crankcase assembly comprising:

• a crankcase made of a first material comprising at least 50% by weight aluminum, the crankcase having a protrusion which extends radially outward from the internal surface of the crankcase;
• a crankcase liner disposed within the crankcase, the crankcase liner having a body and a groove therein which extends along the perimeter of the body of crankcase liner, the crankcase liner;
• a fluid passageway disposed between crankcase and crankcase liner;
• and
• wherein the protrusion of the crankcase is at least partially disposed within the groove of the crankcase liner along the body between the fluid passageway and a base of the crankcase liner.

A method for producing a crankcase assembly comprising:

• forming a groove in the outer surface of crankcase liner;
• heating the crankcase comprising a material that comprises at least about 50% by weight aluminum;
• placing the crankcase liner into the crankcase such that the outer surface of the crankcase liner is placed into contact with an inner surface of the crankcase;
• and
• forming a protrusion that extends radially outward along the inner surface of the crankcase such that the protrusion extends at least partially inside the groove of the crankcase liner.