GEROTOR MECHANISM OF SCREW FACE HYDRAULIC MACHINE Russian patent published in 2001 - IPC

FIELD: construction of holes. SUBSTANCE: invention specifically refers to gerotor mechanisms of screw face hydraulic machines drilling oil and gas wells. Gerotor mechanism includes stator with internal helical teeth and rotor with external helical teeth whose number is less by one than that of internal helical teeth of stator. Profile of teeth of stator in face section is made as envelope of starting contour of cycloidal rack of stator outlined by equidistant shortened cycloid and profile of teeth of rotor looks like envelope of another starting contour of cycloidal rack of rotor outlined by equidistant shortened cycloid by certain mathematical expressions. According to another version of implementation profile of teeth of rotor in face section is outlined by conjugate arcs of circles. Profiles of spaces and protrusions of teeth of rotor are outlined by arcs of radii of which one is specified and profile of space of tooth of rotor is outlined by arc which radius is computed by presented mathematical expression. EFFECT: improved energy characteristics, increased wear resistance and prolonged service life of gerotor mechanism of screw face hydraulic machine. 4 cl, 6 dwg