| 航空发动机转子轴向力动态特征测试技术 |
| |
| 引用本文： | 袁雪,张岩松,邱大明,陈中刚.航空发动机转子轴向力动态特征测试技术[J].航空动力学报,2021,36(9):1804-1810. |
| |
| 作者姓名： | 袁雪 张岩松 邱大明 陈中刚 |
| |
| 作者单位： | 中国航空发动机集团有限公司 沈阳发动机研究所，沈阳 110015 |
| |
| 摘 要： | 以航空发动机止推轴承轴向力为研究对象，基于应力环法的测量原理，发展出一种新的适用于转子轴向力动态特征测试技术。基于固支梁模型设计了扇形支点的应力环传感器，通过理论分析和有限元仿真验证结构设计的合理性，并对应力环传感器测量的灵敏度和静态特性指标进行量化表征。某型航空发动机整机轴向力试车结果表明:转子轴向力中存在不可忽略的动态交变载荷，其峰值与轴向力稳态值的比值为6%~29%。频域分析发现，引起轴向力动态交变载荷的频率成分包括转速基频、转速2倍频及34、68 Hz。相位分析表明，34 Hz与68 Hz引起的动态交变载荷使应力环传感器周向测点的时域波形发生相位同步变化，符合轴向的振动特征；转速基频与2倍频引起的动态交变载荷则沿应力环传感器周向进动变化，符合转子不平衡特征。
|
| 关 键 词： | 轴向力测试 应力环 传感器 动态特征 轴向振动 进动 |
| 收稿时间： | 2021/4/5 0:00:00 |
Test technique for dynamic characteristic of rotor axial force on aero-engine |
| |
| YUAN Xue,ZHANG Yansong,QIU Daming,CHEN Zhonggang.Test technique for dynamic characteristic of rotor axial force on aero-engine[J].Journal of Aerospace Power,2021,36(9):1804-1810. |
| |
| Authors: | YUAN Xue ZHANG Yansong QIU Daming CHEN Zhonggang |
| |
| Affiliation: | Shenyang Engine Research Institute，Aero Engine Corporation of China，Shenyang 110015，China |
| |
| Abstract: | Taking the axial force of thrust bearing on aero-engine as research object，and based on the measurement principle of stress ring method，a new testing technique applicable to dynamic characteristic of rotor axial force was developed.A stress ring transducer with fan-shaped fulcrum structure was designed on the basis of clamped beam model.The rationality of the special stress ring structure was validated by theoretical analysis and finite element simulation； and the measuring sensitivity and static characteristic index of stress ring transducer were quantified and represented.The trial run results of the aero-engine showed that non-negligible dynamic alternating load existed in rotor axial force，and its peak value accounted for 6%-29% of steady-state value.The results of frequency domain analysis indicated that the vibration source of axial force dynamic alternating quantity consisted of the fundamental frequency of rotating speed and the 2 times frequency of rotating speed，as well as 34，68 Hz.The phase analysis reveals that time domain waveform of stress ring circumference measuring points has phase synchronization change due to the dynamic alternating load caused by 34 Hz and 68 Hz，which met the manifestation of axial vibration，while the fundamental frequency and the 2 times frequency of rotating speed could have precessional motion changes along the stress ring circumference，meeting the manifestation of rotor imbalance failure. |
| |
| Keywords: | axial force measurement stress ring transducer dynamic characteristic axial vibration precession |
|
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
