Power Flow and Efficiency Analysis of Compound Planetary Gears Transmission with Bevel Gears

doi:10.3901/JME.2015.21.042

Abstract

Abstract:

The motion of compound planetary gears transmission with bevel gears is analyzed. On this basis the power flows of compound planetary gears transmission with bevel gears are analyzed under two situations which are considered the power losses and without considering them by virtual power theory, the expression of compound planetary gears transmission efficiency is obtained under the defined speed ratio and torque ratio. Further, the influence rule of speed ratio, torque ratio, meshing power losses coefficient and geometrical parameter ratio on compound planetary gears transmission efficiency is studied and the relevant verified experiments are also carried out. Theoretical analysis show that with the increasing of torque ratio, the transmission efficiency of compound planetary gears transmission increases under its meshing power losses coefficient and geometrical parameter ratio are determined, but this influence tendency of speed ratio on its transmission efficiency declines firstly and then increases; there are differences that the compound planetary gears transmission efficiencies are affected by each gear pairs meshing power losses coefficient under its speed ratio, torque ratio and geometrical parameter ratio are determined; with the increasing of geometrical parameter ratio, the compound planetary gears transmission efficiency increases under the determined speed ratio, torque ratio and each gear pairs meshing power losses coefficient. Transmission efficiency tests show that the compound planetary gears transmission efficiency can be improved by using the high accuracy grade bevel gear, increasing the transmission mechanism’s torque ratio and pitch radius of planetary gear.

Key words: meshing power losses, torque ratio, transmission efficiency, virtual power theory

HU Qingchun, LI Jianying, DUAN Fuhai.

Power Flow and Efficiency Analysis of Compound Planetary Gears Transmission with Bevel Gears

[J]. Journal of Mechanical Engineering, 2015, 51(21): 42-48.

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