基于LS-DYNA少齿数非对称斜齿轮动态特性分析

发布时间：2018-05-05 06:16

本文选题：少齿数 + 非对称齿轮　；参考：《机械传动》2017年03期

【摘要】：少齿数非对称斜齿轮作为一种新形齿轮,其体积小且承载能力强,而对其动力学特性尤其瞬时法向相对速度造成弹性接触冲击对齿轮传动系统的稳定性的影响研究较少。以弹性体接触-冲击动力学方程为基础,建立少齿数非对称斜齿轮有限元动态接触模型。在考虑摩擦和阻尼等影响的情况下,对动态齿根弯曲应力和动态传动误差进行研究。描述轮齿在一个啮合周期内的动态齿根弯曲应力的分布规律,对比斜齿轮副整个啮合过程的静动态齿根弯曲应力,同时还分析工况参数对齿根弯曲强度的影响。研究由于主从动轮接触点的瞬时法向相对速度差造成的弹性接触冲击,以少齿数非对称斜齿轮副的瞬时冲击过程为研究对象,分析不同转速时,不同的冲击位置(齿根、节圆和齿顶)对冲击力、冲击应力和冲击时间的影响,对比分析不同压力角的少齿数齿轮冲击应力的变化规律。
[Abstract]:As a new type of gear, asymmetric helical gear with less teeth has small volume and strong bearing capacity. However, there is little research on the effect of elastic contact impact caused by instantaneous normal relative velocity on the stability of gear transmission system. The finite element dynamic contact model of unsymmetrical helical gears with less teeth is established based on the contact-impact dynamic equation of elastic body. Considering the influence of friction and damping, the bending stress and dynamic transmission error of dynamic tooth root are studied. This paper describes the distribution of dynamic root bending stress in a meshing period, compares the static and dynamic tooth root bending stress in the whole meshing process of the helical gear pair, and analyzes the influence of operating conditions on the tooth root bending strength. The elastic contact impact caused by the instantaneous normal relative velocity difference of the contact point of the main and slave driving wheel is studied. Taking the instantaneous impact process of the asymmetric helical gear pair with less teeth as the research object, the different impact positions (tooth root) at different rotational speeds are analyzed. The effects of pitch circle and tooth top on impact force, impact stress and impact time were compared and analyzed.
【作者单位】：江阴职业技术学院机电工程系;
【基金】：江苏省自然科学基金(BK2013168) 江阴职业技术学院课题(15-E-JS-26)
【分类号】：TH132.41

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