| 引用本文: | 李静,曹树谦,郭虎伦,聂日敏,侯远航.考虑中介轴承弹流润滑时双转子系统振动特性[J].哈尔滨工业大学学报,2021,53(6):138.DOI:10.11918/201909168 |
| LI Jing,CAO Shuqian,GUO Hulun,NIE Rimin,HOU Yuanhang.Vibration performance of dual rotor systems considering elastohydrodynamic lubrication of intershaft bearings[J].Journal of Harbin Institute of Technology,2021,53(6):138.DOI:10.11918/201909168 |
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| 考虑中介轴承弹流润滑时双转子系统振动特性 |
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李静1,2,3,曹树谦1,2,3,郭虎伦1,2,3,聂日敏1,2,3,侯远航1,2,3
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(1.天津大学 机械工程学院,天津 300354; 2.天津市非线性动力学与控制重点实验室(天津大学),天津 300354; 3.天津大学 力学国家级实验教学示范中心,天津 300354)
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| 摘要: |
| 为研究中介轴承在弹流润滑作用时双转子系统的非线性振动特性,针对航空发动机双转子系统,根据弹流润滑理论和转子动力学理论,建立中介轴承弹流润滑接触模型和中介轴承-双转子系统模型.采用数值仿真方法获得系统动力学特性,对比分析了考虑弹流润滑作用和忽略弹流润滑作用两种工况下,双转子系统的幅频响应特征,并比较了中介轴承赫兹接触刚度、径向游隙以及润滑油黏度对系统特性的影响. 结果表明: 中介轴承弹流润滑作用对高压转子和低压转子一阶共振峰附近的振幅及共振峰位置影响较小,对高转速区间的共振峰影响较大,使共振峰右移并且共振峰处振幅减小; 分别改变中介轴承赫兹接触刚度和径向游隙,考虑弹流润滑作用与不考虑弹流润滑作用相比,一阶共振峰处振幅改变小于5%,在二阶共振峰处振幅改变百分数在4%~9%之间; 一阶共振峰位置未发生偏移,二阶共振峰向高频移动2%~8%; 改变润滑油黏度,对低压转子和高压转子振动幅值影响小于1%. 最后利用气体驱动双转子实验台对仿真结果进行验证. |
| 关键词: 双转子系统 中介轴承 弹流润滑 动力学特性 实验研究 |
| DOI：10.11918/201909168 |
| 分类号:V231 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(11672201);航空发动机及燃气轮机重大专项基础研究项目(2017-IV-0008-0045) |
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| Vibration performance of dual rotor systems considering elastohydrodynamic lubrication of intershaft bearings |
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LI Jing1,2,3,CAO Shuqian1,2,3,GUO Hulun1,2,3,NIE Rimin1,2,3,HOU Yuanhang1,2,3
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(1.School of Mechanical Engineering, Tianjin University, Tianjin 300354, China; 2.Tianjin Key Laboratory of Nonlinear Dynamics and Control (Tianjin University), Tianjin 300354, China; 3.National Demonstration Center for Experimental Mechanics Education, Tianjin University, Tianjin 300354, China)
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| Abstract: |
| To study the nonlinear vibration characteristics of dual rotor systems considering the elastohydrodynamic lubrication (EHL) of intershaft bearings, an intershaft bearing contact model and an intershaft bearing-dual rotor system model for aero-engine were established based on the EHL theory and the rotor dynamics theory. The dynamic characteristics of the system were obtained by numerical simulation. The amplitude-frequency response of the dual rotor system was analyzed under the conditions with or without EHL. The influences of Hertz contact stiffness, radial clearance, and viscosity of lubricating oil of intershaft bearing on the system characteristics were compared. Results show that EHL had little effect on the vibration amplitude and the position of the resonant peak of the high pressure rotor and low pressure rotor at the first order resonant peak, while it had great effect on the resonant peak in the high speed range, which made the resonant peak move to the right and decreased its amplitude. With varying Hertz contact stiffness and radial clearance of intershaft bearing, the variation of amplitude at the first order resonant peak was less than 5% when considering EHL, and that at the second order resonant peak was between 4% and 9%. The position of the first order resonant peak was not offset, while that of the second order resonant peak moved about 2%–8% to the high-frequency direction. The influence on the vibration amplitude of the low pressure rotor and high pressure rotor was less than 1% when the viscosity of lubricating oil was changed. Finally, simulation results were validated by gas-driven dual rotor experimental facility. |
| Key words: dual rotor system intershaft bearing elastohydrodynamic lubrication dynamic characteristics experimental research |
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