MULTISTART GYRATOR MECHANISM OF SCREW HYDRAULIC MACHINE Russian patent published in 2002 - IPC

FIELD: oil producing industry. SUBSTANCE: invention relates to construction of wells and it can be used in screw pumps for production of oil and transfer of liquid and in general-purpose screw hydraulic machines. Proposed mechanism has stator with internal helical teeth made of elastoplastic material and rotor with external helical teeth. Number of stator teeth is greater than number of rotor teeth by one. Axis of stator is displaced relative of axis of rotor by value of eccentricity equal to half of tooth depth. End face profile of teeth of one of members is made as envelope of basic rack inscribed by equidistant curve of shortened cycloid with displacement. End face profile of teeth of other member is made in form if equidistant curve of envelope of first member rolling over centroids without slipping and equidistance being equal to half of diametral interference in engagement. Invention provides uniform interference at all phases of contact of stator and rotor teeth. EFFECT: improved reliability and increased service life of mechanism. 4 dwg