HYDRAULIC MOTOR Russian patent published in 2001 - IPC

FIELD: hydraulic drives of different mechanisms. SUBSTANCE: proposed hydraulic motor has stator with internal gear rim and teeth in form of cylindrical rollers installed with axial clearance, rotor installed inside stator with external gear rim for forming working chambers. Slots of width equal to 2.2-2.4 of rotor tooth radius and length not exceeding 0.5 of rotor width are made in tooth spaces. Motor has also covers in contact with stator end faces and provided with working medium inlet and outlet channels and system of distributing end face holes placing the working chambers in communication with working medium inlet/outlet channels. End faces of rollers are made spherical, with height of sphere equal to 0.5 of axial clearance. Additional slots are made in tooth spaces of rotor gear rim over its entire width. Width of slots is equal to diameter of holes, and depth is made to provide contact of slots with holes. EFFECT: increased efficiency and transmitted torque. 3 dwg