基于转子动力学的偏心齿轮对轴旋转的响应分析
巩博瑞，陈虹旭，殷国富
（四川大学 制造科学与工程学院，四川 成都 610065）
摘要：乏组水下检测装置是核电站中堆外重要装备之一，对乏组件的测量精度关系到核电站的安全运行。检测装置轴上齿轮存在不平衡质量，降低了测量精度、破坏了测量稳定性。选取乏组水下检测装置中一关键传动轴结构，简化模型并建立了传动轴的运动微分方程，通过有限元法进行了转子动力学分析，得到了多工况下齿轮节点的轨迹图和位移时程图。从分析结果可以看出：偏心将导致齿轮中心点轨迹产生较大变化；偏心量一定时，两齿轮间的偏心相位角决定了齿轮中心点轨迹，节点位移幅值关于180°成对称关系。
关键词：转子动力学；偏心；瞬态分析；轨迹图
中图分类号：TM623.4 文献标志码：A doi：10.3969/j.issn.1006-0316.2019.05.006
文章编号：1006－0316 (2019) 05－0028－06
Response Analysis of Eccentric Gear to Axis Rotation Based on Rotor Dynamics
GONG Borui，CHEN Hongxu，YIN Guofu
( School of Manufacturing Science & Engineering, Sichuan University, Chengdu 610065, China )
Abstract：The underwater detection device for spent units is one of the most important equipment outside nuclear power plant. The measurement accuracy of spent components is related to the safe operation of nuclear power plant. Because of the unbalanced mass of the axle gears in the detection device, the accuracy and stability of measurement is decreased. In this paper, the structure of the key transmission shaft in the underwater detection device is selected, and the simplified model and the differential equation of the motion of the transmission shaft are established. The dynamic analysis of the rotor is carried out by finite element method, and the locus and displacement time histories of the gear nodes under multiple working conditions are obtained. The results show that eccentricity will lead to a great change in the track of the center point of the gear; when eccentricity is constant, the eccentric phase angle between the two gears determines the track of the center point of the gear, and the displacement amplitude of the node is symmetrical at 180°.
Key words：rotor dynamics；eccentric；transient analysis；locus map
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收稿日期：2018－12－22
基金项目：四川省科技计划项目（2018GZ0111）
作者简介：巩博瑞（1993－），男，甘肃平凉人，硕士研究生，主要研究方向为计算机辅助设计与制造；殷国富（1956－），男，四川西充人，教授，博士生导师，主要研究方向为制造自动化、智能设计技术、CAD/CAM/CIMS。
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