| Author Name | Affiliation | | Chuang Huang | School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
Gree Electric Appliances, Inc.of Zhuhai, Zhuhai 519070,Guangdong, China | | Yongqiang Zhao | School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China | | Guanghu Jin | National Key Laboratory of Science and Technology on Helicopter Transmission, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: |
| To study the overall vibration characteristics of the sprag clutch-flexible rotor system (SC-FRS) under high-speed operating conditions, a finite element model of SC-FRS considering rotor flexibility and bearing support stiffness was established based on the proposed calculation method of the stiffness matrix. According to this model, the natural frequency and mode shape of the system are calculated, and the correctness of the model was verified by comparing it with the calculation results of ANSYS software. Under the action of unbalance, the bending-torsion coupled vibration and the dynamic load of the inter-shaft bearings were analyzed, and it is found that the resonant peak in the torsional direction has the same resonance frequency as that in the bending direction. A test rig for the sprag clutch-rotor system was built, and the axis trajectory and critical speed were tested. The test results show that the finite element model of SC-FRS can accurately describe the vibration characteristics of the system. The coupling vibration characteristics analysis of the sprag clutch-flexible rotor system can provide theoretical guidance for the dynamic design of the sprag clutch components. |
| Key words: sprag clutch-rotor system finite element model unbalanced mass experimental verification |
| DOI：10.11916/j.issn.1005-9113.2020093 |
| Clc Number:TH133.4 |
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| Descriptions in Chinese: |
| 斜撑离合器-柔性转子系统有限元建模及振动特性分析 黄创1,2，赵永强1*，靳广虎3* （1. 哈尔滨工业大学 机电工程学院，哈尔滨 150001； 2. 珠海格力电器股份有限公司，广东 珠海 519070； 3. 南京航空航天大学 直升机传动技术重点实验室，南京 210016） 摘要：为研究高速运行工况下斜撑离合器-柔性转子系统 (SC-FRS，sprag clutch-flexible rotor system) 的整体振动特性，基于推导的斜撑离合器刚度矩阵的计算方法，建立了考虑转子柔性及轴承支撑刚度的SC-FRS的有限元模型。以此模型为基础，计算了系统的固有频率和模态振型，通过与ANSYS软件计算结果的比较，验证了本文模型正确性。同时，在不平衡量作用下，分析了系统的弯扭耦合振动和中介轴承动载荷，研究发现扭转方向的共振峰与弯曲方向的共振峰有着相同的共振频率。搭建了斜撑离合器-转子系统试验台，进行了轴心轨迹和临界转速的测试，试验结果表明使用SC-FRS的有限元模型能够较准确地描述系统的振动特性。 关键词：斜撑离合器转子系统；有限元模型；不平衡量；实验验证 |
