Patent ID: 11965510
Assignee: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A compressor body comprising:
a compression mechanism including at least one screw rotor that compresses gas;
a casing that accommodates the compression mechanism and defines compression working chambers therein;
a suction side bearing that rotatably supports the at least one screw rotor;
a bearing chamber that accommodates the suction side bearing; and
at least one liquid supply port that communicates with the compression working chambers, the at least one liquid supply port being configured to supply liquid supplied from an outside of the casing into the compression working chambers, wherein
the casing has an internal liquid supply flow path that extends from a discharge side of the compression working chambers as an upstream side to a suction side of the compression working chambers as a downstream side, the internal liquid supply flow path being configured to supply the liquid to the at least one liquid supply port, and
the internal liquid supply flow path has a first flow path whose downstream portion reaches the bearing chamber, the first flow path being configured to supply the liquid to the suction side bearing, wherein
the internal liquid supply flow path includes a second flow path that is branched from the first flow path, and
the second flow path extends from the discharge side of the compression working chambers as an upstream side to the suction side of the compression working chambers as an downstream side without communicating with the bearing chamber, and has a second liquid supply port that is configured to supply the liquid into the compression working chambers.