一种新型摆线针轮减速器的模态特性研究
兰克飞，侯力，游云霞，陈帅，白青松
（四川大学 机械工程学院，四川 成都 610065）
摘要：新型摆线滚针减振减速器是以传统摆线针轮减速器为基础，在传统偏心轴承和摆线轮之间加入了一种柔性衬垫结构，以减小冲击与吸收振动，降低噪声，保证传动平稳，提高整个设备的性能和寿命。通过对减速器的精确建模和有限元模态分析，得到传统摆线针轮行星减速器、5种不同硬度的柔性材料对应的新型摆线针轮行星减速器的1～10阶固有频率及模态振型规律。根据变化规律选择新型摆线针轮行星减速器的柔性材料，然后将新型减速器、传统减速器的固有频率分别与啮合频率比较，发现新型减速器的固有频率与啮合频率的差值更大，因此，新型摆线滚针减振减速器能够更好地避免共振。
关键词：新型摆线针轮减速器；柔性材料；模态分析；共振
中图分类号：TH132.46 文献标志码：A doi：10.3969/j.issn.1006-0316.2019.09.010
文章编号：1006－0316 (2019) 09－0051－07
Finite Element Modal Analysis of New-Type Cycloidal Pinwheel Reducer
LAN Kefei，HOU Li，YOU Yunxia，CHEN Shuai，BAI Qingsong
( School of Mechanical Engineering, Sichuan University, Chengdu 610065, China )
Abstract: The new cycloidal needle roller vibration reducer incorporates a flexible gasket structure between the traditional eccentric shock bearing and the cycloidal wheel based on the traditional cycloidal pinwheel reducer to reduce shock, absorb vibration and reduce noise, which leads to smooth transmission and improved performance as well as longer life time. Through precise modelling and finite element modal analysis of the reducer, the 1-10 order natural frequencies and modal shapeof the traditional cycloidal pinwheel planetary reducer and the new cycloidal pinwheel planetary reducer corresponding to 5 flexible materials with different hardness are obtained. According to the law of variation, the flexible material of the new cycloidal pinion planetary reducer is selected. Then the natural frequencies of the new reducer and the traditional reducer are compared with the meshing frequency respectively. It turns out that the difference between the natural frequency and the meshing frequency of the new reducer is greater, which indicates that the new cycloidal needle roller vibration reducer can better avoid resonance.
Key words：a new cycloidal pinwheel reducer；flexible material；modal analysis；resonance
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收稿日期：2019－03－20
作者简介：兰克飞（1993－），男，山东济南人，硕士，主要研究方向为机械设计及理论；侯力（1956－），男，四川绵阳人，博士，教授，主要研究方向为机械传动、机电一体化和CAD/CAPP/CAM/PMD。
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