Abstract
Screw rotor profile in the compressor is one of the significant factors affecting the efficiency and the manufacturing cost. The conventional screw rotor profile has made it difficult to reduce the manufacturing cost and to improve the precision, which affects the efficiency, due to the poor machinability. A new rotor profile having following advantages ; (i) higher productivity and precision due to more suitable profile for hobbing the rotor, (ii) smaller blow hole area and (iii) lower leakage loss. Based on the new rotor profile, an advanced oil injected screw compressor has been developed, which can achieve higher efficiency and lower manufacturing cost than those of the conventional compressor.
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