The development of new types of planetary and planetary face- gear drives is proposed. Fuentes, Alfonso Vecchiato, Daniele Gonzalez-Perez, Ignacio Handschuh, Robert (Technical Monitor) Litvin, Faydor L. New Design and Improvement of Planetary Gear Trains It is indicated that this methodology offers the designer/analyst a comprehensive tool with which planetary drives may be quickly and effectively evaluated. The computer program was used to determine the effect of manufacturing errors, damping and component stiffness, and transmitted load on dynamic behavior. The dynamic model has nine degrees of freedom resulting in a set of simultaneous second order differential equations with time varying coefficients, which are solved numerically. It considers fluctuating output torque, elastic behavior in the system, and loss of contact between gear teeth. A mathematical model comprised of power source, load, and planetary transmission is used to determine the instantaneous loads to which the components are subjected. Items considered in the analysis are: (1) static and dynamic load sharing among the planets (2) floating or fixed Sun gear (3) actual tooth geometry, including errors and modifications (4) positioning errors of the planet gears (5) torque variations due to noninvolute gear action. The method is incorporated into a computer program so that the static and dynamic behavior of individual components can be examined.

By utilizing the equivalent gear train concept, the developed method may be extended for use for all types of epicyclic gearing.

The analysis can be applied either involute or noninvolute spur gearing. A variable-variable mesh stiffness (VVMS) model was used to simulate the external and internal spur gear mesh behavior, and an equivalent conventional gear train concept was adapted for the dynamic studies. Pintz, A.ДЄ method to analyze the static and dynamic loads in a planetary gear train was developed.

Planetary gear template generator