GEAR TRAIN OF SCREW COMPRESSOR Russian patent published in 1998 - IPC

FIELD: compressor engineering. SUBSTANCE: gear train has profile of tooth 3 in cross section which is asymmetric relative to straight line running through point of tooth 3 and center of rotation of rotor 1. Rotor 1 with lesser number of starts on side of low pressure from tip circle to pitch circle is formed by conjugated curves located in succession from point of tooth 3 to its root. Sections of rotor 2 with larger number of starts are the envelopes corresponding to respective sections of rotor with lesser number of starts. EFFECT: enhanced efficiency and loading capacity of gear train due to increased length of throttling path at tooth point and increased pressure angle on side of low pressure at simultaneous increase of relative length of contact line. 3 dwg