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Abstract: The
multi-ring gear reducer (MRGR) is a novel class of planetary gear
transmission devices with small tooth number difference. It has numerous
advantages over common gear reducers such as large transmission ratio,
high loading capacity, compact volume, low fabricating cost and wide
adaptability. To improve dynamic performance of the MRGR, the systematic
elastodynamic equation is formulated by taking into account the
elasticity of high-speed shafts, gear-couplers, meshing teeth and
bearings. An ANSYS based finite element model is developed for the
gear-couplers whose rigid-body motions are constrained by linear springs
with equivalent stiffness. The stresses, displacements and elastic
deformations of the gear-couplers are investigated in a whole motion
cycle of the parallelogram mechanism. The actual loading states of the
components are obtained by integrating iteratively the ANSYS based
finite element analysis of the gear-couplers and the elastodynamic
analysis of the MRGR. The simulation results reveal that both
longitudinal and lateral deformations of the gear-couplers will greatly
affect dynamic performance of the MRGR and the rating life of planetary
bearings will be shortened as a result of elastic deformations of the
gear-couplers.
Key words: Multi-ring
gear reducers Gear-coupler Finite element analysis Elastodynamic
analysis
CLC No: TH132.4
TH113.1
国家自然科学基金(50205019)和教育部高等学校博士学科点专项科研基金(20040056018)资助项目.
Received
20051107, received in revised form 20060320
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