盘轴过盈力不足-支座松动耦合故障的转子系统的振动特性研究

doi:10.3901/JME.2022.11.109

机械工程学报 ›› 2022, Vol. 58 ›› Issue (11): 109-119.doi: 10.3901/JME.2022.11.109

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盘轴过盈力不足-支座松动耦合故障的转子系统的振动特性研究

李志农^1,2, 陈世尧¹, 乔芳¹, 周世健¹, 王冬³

1. 南昌航空大学无损检测技术教育部重点实验室南昌 330063;
2. 国防科学技术大学装备综合保障技术重点实验室长沙 410073;
3. 上海交通大学机械系统与振动国家重点实验室上海 200240

收稿日期:2021-07-08 修回日期:2022-03-08 出版日期:2022-06-05 发布日期:2022-08-08
通讯作者: 李志农(通信作者),男,1966年出生,博士,教授,博士研究生导师。主要研究方向为机械设备状态监测与故障诊断,转子动力学。E-mail:lizhinong@tsinghua.org.cn
作者简介:陈世尧,男,1995年出生,硕士研究生。主要研究方向为转子动力学,E-mail:1037823055@qq.com;乔芳,女,1995年出生,硕士研究生。主要研究方向为转子动力学,E-mail:1654511145@qq.com;周世健,男,1966年出生,博士,教授,博士生导师。研究方向为机械动力学与故障诊断。E-mail:408608628@qq.com;王冬,男,1984年出生,博士,副教授。研究方向为机械动力学与故障诊断。E-mail:dongwang4-c@sjtu.edu.cn
基金资助:
国家自然科学基金（52075236，51675258）、装备预研基金（6142003190210）和江西省自然科学基金重点（20212ACB202005）资助项目

Vibration Characteristics of a Rotor System with Coupling of Insufficient Interference Fit of Disc-Shaft and Pedestal Looseness

LI Zhinong^1,2, CHEN Shiyao¹, QIAO Fang¹, ZHOU Shijian¹, WANG Dong³

1. Key Laboratory of Nondestructive Testing Ministry of Education, Nanchang Hangkong University, Nanchang 330063;
2. Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha 410073;
3. State Key Laboratory of Mechanical Systems and Vibration, Shanghai Jiaotong University, Shanghai 200240

Received:2021-07-08 Revised:2022-03-08 Online:2022-06-05 Published:2022-08-08

摘要/Abstract

摘要： 转子在交变载荷作用下极易产生盘轴过盈配合失效，过盈配合失效将导致盘轴打滑、微动等，同时还易引起其他孪生故障。针对盘轴过盈力不足-支座松动耦合故障，建立了转子系统有限元模型。仿真分析了转速及接触过盈量对转子系统动力学特性的影响，并搭建了盘轴过盈力不足-支座松动耦合故障转子试验台，通过试验验证了仿真结果的合理性。结果表明：转盘的时域振动响应有明显的拍振特性，且随着转速的增加，拍振现象越来越明显，拍振周期变大；由于盘轴间的过盈力不足，盘和轴的转速不完全相同，且随着转速的增加，盘轴转速差的稳态值呈增大趋势。盘心轨迹随着转速的增加而逐渐向圆心靠拢；随着过盈量的增加，盘心轨迹不仅逐渐向圆心靠拢，而且还出现了“内8字”形轨迹。

关键词: 过盈失效, 支座松动, 耦合故障, 振动特性, 转子系统

Abstract: The rotor is easy to produce the interference fit failure between the disc and the shaft under alternating load, this interference fit failure will cause the skidding, slight loosening between the disc and the shaft etc, also easy to cause other twin faults. In order to reveal the vibration characteristics of the rotor with coupling faults of insufficient interference fit and pedestal looseness, a finite element model of the rotor system with coupling faults of insufficient interference fit and pedestal looseness, is proposed. The simulation analyzes the influence of the loosening stiffness, loosening damping, rotating speed and interference range on the dynamic characteristics of the rotor system. A test bench for the rotor system with coupling of insufficient interference fit and pedestal looseness is built to verify the rationality of the simulation results. The results show that obvious beat vibration characteristics appear in the time domain vibration response of the rotor system with the loose disk. The beat vibration phenomenon becomes more and more obvious, and the beat period becomes larger with the increase of the rotating speed. Due to the insufficient interference force between the disc and the shaft, the rotating speed of the disk is not exactly the same as that of the shaft, and the difference of the disc speed to that of the shaft shows an increasing trend with the increase of the speed. The orbit of the disc centre gradually moves closer to the circle centre with the increase of the speed. With the increase of the amount insufficient interference, the orbit of the disc centre gradually moves closer to the circle centre and occurs an inner-8 shape.

Key words: interference failure, pedestal looseness, coupling faults, vibration characteristics, rotor system

中图分类号:

TH17
TH132

李志农, 陈世尧, 乔芳, 周世健, 王冬. 盘轴过盈力不足-支座松动耦合故障的转子系统的振动特性研究[J]. 机械工程学报, 2022, 58(11): 109-119.

LI Zhinong, CHEN Shiyao, QIAO Fang, ZHOU Shijian, WANG Dong. Vibration Characteristics of a Rotor System with Coupling of Insufficient Interference Fit of Disc-Shaft and Pedestal Looseness[J]. Journal of Mechanical Engineering, 2022, 58(11): 109-119.

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盘轴过盈力不足-支座松动耦合故障的转子系统的振动特性研究

Vibration Characteristics of a Rotor System with Coupling of Insufficient Interference Fit of Disc-Shaft and Pedestal Looseness

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