行星齿轮箱齿根应变的光纤光栅测量方法  

Measurement of Tooth Root Strainin Planetary Gearbox with Fiber Bragg Grating

作　　者：牛杭 侯成刚[1] 张小栋[1,2] 赵欣丹 NIU Hang;HOU Chenggang;ZHANG Xiaodong;ZHAO Xindan(School of Mechanical Engineering,Xi'an Jiaotong University Xi'an,710049 ,China;Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xizan Jiaotong University Xi'an,710049 ,China)

机构地区：[1]西安交通大学机械工程学院,西安710049 [2]西安交通大学现代设计及转子轴承系统教育部重点实验室,西安710049

出　　处：《振动．测试与诊断》2019年第4期745-751,902,903,共9页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(51675419)

摘　　要：针对行星齿轮箱故障诊断的需求,以及内齿圈齿根应变难以准确测量的工程实际问题,提出了一种光纤光栅(fiber Bragg grating,简称FBG)动态测量内齿圈齿根应变的方法。首先,通过理论分析,仿真计算得到了内齿圈齿根应变的分布曲线以及变化曲线;其次,研究了光纤光栅在非均匀应变场作用下的传感原理,从测点布置以及测量系统构建等角度分析了所提出的测量方法;最后,在行星齿轮箱实验台上开展了内齿圈齿根应变的测量实验。实验与仿真结果对比分析表明,利用所提出的测量方法获取的内齿圈齿根应变信号表现出明显的单、双齿交替啮合区间,且每个区间的范围以及各区间下齿根应变的大小与理论计算结果具有较好的一致性。与传统方法相比,该方法更加适用于行星齿轮箱内狭小空间下齿根应变的在线测量任务。An approach to measure the tooth root strain of the ring gear in planetary gearboxes using fiber Bragg grating(FBG)is proposed.First,the computing method of the ring gear tooth root strain is studied,and the tooth root strain of the ring gear is simulated.Second,the measurement method is deeply analyzed from three aspects:the strain sensing characteristics of FBG,the installation of FBG,and the structure of the measurement system.Finally,the measurement is carried out.The tooth root strain of the ring gear obtained from the experiment shows obvious single and double meshing sections,meanwhile the range of each section and the strain values at each section are similar with that of the theoretical results,which proves that the tooth root strain of the ring gear can be accurately acquired with the proposed method.Compared with the traditional methods,the new method is more suitable for the real-time measurement of the ring gear tooth root strain in the narrow space of planetary gearboxes.

关 键 词：行星齿轮箱 齿根应变 内齿圈 光纤光栅 动态测量 

分 类 号：TH132.41[机械工程—机械制造及自动化] TN25[电子电信—物理电子学]