| 基于AK-IS法的航空齿轮泵滑动轴承可靠性分析 |
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| 引用本文： | 高宁,李华聪,洪林雄,曹瑞,符江锋.基于AK-IS法的航空齿轮泵滑动轴承可靠性分析[J].北京航空航天大学学报,2022,48(6):1057-1064. |
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| 作者姓名： | 高宁 李华聪 洪林雄 曹瑞 符江锋 |
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| 作者单位： | 西北工业大学 动力与能源学院, 西安 710072 |
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| 基金项目： | 国家科技重大专项(2017-V-0013-0065)~~； |
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| 摘 要： | 为研究高转速、低介质黏度运行的航空齿轮泵滑动轴承动压润滑可靠性，通过将Reylonds润滑方程与影响矩阵耦合，建立了考虑轴瓦弹性变形的航空齿轮泵滑动轴承弹流润滑(EHL)模型。考虑滑动轴承尺寸公差和运行工况等引起的不确定性，将与滑动轴承润滑特性密切相关的动压润滑的压力峰值作为可靠性判据，采用自适应Kriging和重要抽样法相结合的AK-IS法对滑动轴承动压润滑特性进行了可靠性及灵敏度计算。研究结果表明:考虑轴瓦弹性变形的压力峰值比刚性轴瓦压力峰值降低15.04%，表明滑动轴承弹流润滑对轴承动压润滑的影响不能忽略；基于AK-IS法的航空齿轮泵滑动轴承动压润滑可靠性分析具有准确性和高效性；各不确定因素对动压润滑可靠性的影响程度不同，其中轴承的半径间隙对可靠性最敏感，转速对可靠性最不敏感。
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| 关 键 词： | 航空齿轮泵 滑动轴承 弹流润滑(EHL) AK-IS法 可靠性分析 |
| 收稿时间： | 2020-12-26 |
Reliability analysis of journal bearings inside aero-gear pump based on AK-IS method |
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| Affiliation: | College of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China |
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| Abstract: | To study the hydrodynamic lubrication reliability of journal bearings inside aero-gear pumps running at high speed and with low medium viscosity, an elastohydrodynamic lubrication (EHL) model considering elastic deformation of bearing bush is established by coupling Reynolds lubrication equation with influence matrix. Considering the uncertainty caused by the size tolerance and operating conditions of journal bearings, the peak pressure of hydrodynamic lubrication, which is closely related to the lubrication characteristics of journal bearings, is taken as the reliability criterion. The AK-IS method combining adaptive Kriging and importance sampling is used to calculate the reliability and sensitivity of the hydrodynamic lubrication characteristics of journal bearings. The results show that considering bearing deformation, the pressure peak value of journal bearings is 15.04% lower than that of rigid bearings, and hence the influence of EHL on hydrodynamic lubrication of bearings cannot be neglected. The results also show the accuracy and efficiency of the AK-IS based reliability analysis of hydrodynamic lubrication of journal bearings. Moreover, the degree of the effect of various uncertainties on the reliability of hydrodynamic lubrication is different, with the radius clearance of bearings being the most sensitive to reliability, and the rotational speed the least. |
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