GYRATOR MECHANISM OF HELICAL HYDRAULIC MACHINE Russian patent published in 2004 - IPC

FIELD: gear-type gyrator mechanisms; drilling oil and gas wells.

SUBSTANCE: proposed gyrator mechanism has gear pair rotor-stator of internal cycloidal engagement whose teeth are in constant contact. Addendum modification shift is set taking into number of teeth according by the following relationships:

and maximum permissible magnitude of stator contour diameter are equal to

where are maximum permissible positive and negative addendum modification shifts; a is engagement eccentricity; is number of teeth of stator and rotor; is root circle diameter at absence of shift.

EFFECT: enhanced adaptability.

9 dwg