Direct drive refrigerant screw compressor with refrigerant lubricated rotors

A direct-drive refrigerant screw compressor, comprising:

• a housing;
• a compression chamber in the housing;
• a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile;
• a fluid being disposed in the compression chamber, the fluid consisting of a working fluid for providing lubrication to each rotor, wherein the working fluid is refrigerant delivered from a condenser conduit to the compressor for providing lubrication to compressor;
• a first port extending through the housing and configured for directing the fluid toward the compression chamber;
• wherein:
• when the compressor is activated, each rotor rotates and the fluid is distributed about each rotor to lubricate each rotors
• for each of the rotors, the compressor includes a plurality of bearing packs disposed within a respective plurality of bearing chambers, the plurality of bearing chambers being structural portions of the housing that are in or proximate the compression chamber, the respective plurality of bearing chambers being configured to securely position the respective bearing packs, the plurality of bearing chambers including a forward bearing chamber and an aft bearing chamber for each of the rotors, the forward and aft bearing chambers being fluidly connected with each other through the compression chamber of each of the rotors,
• wherein:
• the fluid is directed to the forward and aft bearing chambers for each of the rotors within the compressor that are fluidly coupled to the compression chamber;
• and
• upon activation of the compressor, the fluid is injected to one side of the plurality of bearing chambers and flows through the plurality of bearing chambers to lubricate each of the plurality of bearing packs and is distributed about the rotors;
• and
• the condenser conduit includes a forward branch and an aft branch for injecting in parallel the working fluid to the forward bearing chamber and the aft bearing chamber for each of the rotors of the compressor, each of the forward and aft branches of the condenser conduit includes a plurality of sub-branches for injecting in parallel the working fluid to the plurality of bearing chambers on each of the forward and aft branches of the condenser conduit.