LightWeight Design for Planetary Gear （轻量级的行星齿轮的设计）.pdf

technical Light-Weight Design for Planetary Gear Transmissions Bernd-Robert Höhn, Karsten Stahl and Philipp Gwinner There is a great need for future powertrains in automotive and industrial applications to improve upon their efficiency and power density while reducing their dynamic vibration and noise initiation. It is accepted that planetary gear transmissions have several advantages in comparison to conventional transmissions, such as a high power density due to the power division using several planet gears (Ref. 1). This paper presents planetary gear transmissions, designed according to ISO 6336 (Ref. 3), optimized in terms of efficiency, weight and volume, and calculated using low-loss involute gears (Ref. 4) as well as the maximum feasible number of planets. Introduction low load-dependent power losses due to low sliding in the load- As mentioned, planetary gear transmissions generally feature ed gear meshes. The gears of each concept and each gear ratio various advantages in relation to conventional gear transmis- are designed according to ISO 6336 (Ref. 3), with optimized sions, such as higher efficiency, higher feasible gear ratios, com- tool parameters to produce characteristically low-loss gears. pactness and lower weight. Present research concentrates on The volume of each concept is calculated assuming the gear planetary gear transmission designs with a low volume, low wheels, as well as the two-sided carrier shafts, to be solid cylin- power losses and, therefore, high efficiency values. Most of the ders. For the sake of simplicity, detailed shaft geometries, as well present applications are characterized by basic planetary gear as the weight and additiona