Processing capabilities of reducers with eccentric gearing for rotary drilling rigs

The present paper is dedicated to assessment of possibilities for using reducers with eccentric involute gearing in the system of the drilling rig top drive. Modern problems of top drive systems, in particular disadvantages of applied reducers are considered. The kinematics of eccentric gears is investigated; the main characteristics of the proposed gearing are calculated. High gear ratios and efficiency of the mechanism with its low weight and dimensions are revealed.