针对某船用轴流涡轮增压器的径向轴承进行性能优化设计，采用数值模拟方法，对比分析不同的轴承油楔结构参数和滑油参数对径向轴承油膜特性的影响；之后开展了径向轴承油楔结构优化设计、供油参数、油楔公差等和转子稳定性的分析。结果表明，油楔宽度L变化对轴承功耗影响最大，而对轴承油膜厚度、油膜压力、油膜温度等参数有一定影响；经优化后的径向轴承-转子系统的运行稳定性得到大幅提升，径向轴承优化后降低了机械功耗3 kW以上。对径向轴承参数的分析方法和结论，对该船用大流量涡轮增压器径向轴承设计具有重要的工程应用价值。
The performance optimization design of the radial bearing of a marine axial flow turbocharger was carried out. The numerical simulation method was used to compare and analyze the influence of different bearing oil wedge structure parameters and lubricating oil parameters on the oil film characteristics of the radial bearing. After that, the optimization design of the oil wedge structure of the radial bearing, the oil supply parameters and the stability of the rotor were analyzed. The results show that the change of the width of the oil wedge L has the greatest influence on the power consumption of the bearing, and has a certain influence on the oil film thickness, oil film pressure, oil film temperature and other parameters of the bearing. The operation stability of the optimized radial bearing-rotor system has been greatly improved, and the mechanical power consumption has been reduced by more than 3 kW after the optimization of the radial bearing. The analysis method and conclusion of the radial bearing parameters have important engineering application value for the design of the radial bearing of the marine large flow turbocharger.
2025,47(10): 100-106 收稿日期：2024-6-26
DOI：10.3404/j.issn.1672-7649.2025.10.017
分类号：U664.121
作者简介：申华（1987-），男，硕士，高级工程师，研究方向为增压器结构设计
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