The effects of dimensional manufacturing tolerances on stability of a symmetric hydrodynamic journal bearing rotor system – an experimental investigation
The effects of dimensional manufacturing tolerances on stability of a symmetric hydrodynamic journal bearing rotor system – an experimental investigation
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DOI：
10.1177/1350650111414627
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发表时间：
2011-09
期刊：
影响因子：
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通讯作者：
P. Ogrodnik;W. Xu;M. Goodwin;G. Bancroft
中科院分区：
文献类型：
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作者：
P. Ogrodnik;W. Xu;M. Goodwin;G. Bancroft
大尺寸对动压径向轴承系统设计和运行的重要性已被广泛了解，然而，制造公差的影响仅被宏观地分析。在前人理论分析的基础上，对尺寸制造公差的影响进行了实验研究。重要的是，这项研究着眼于个体效应和综合效应。实验数据表明，根据稳态工作位置的不同，制造公差在估计油膜不稳定开始时产生的误差可高达±20%。这一结果表明，为了最大限度地减少制造公差对系统稳定性的影响，动压滑动轴承系统应设计为在修正的Sommerfeld数大于0.1的情况下运行，其中制造公差对系统稳定性的影响可以忽略不计。
The importance of gross dimensions on the design and operation of hydrodynamic journal bearing system are widely understood, however, the effects of manufacturing tolerances have only been macroscopically analysed. Building on previous theoretical analyses, an experimental investigation on the effect of dimensional manufacturing tolerances is presented. Importantly, the study looks at individual effects and combined effects. The experimental data suggested that the error created by manufacturing tolerances in estimating the onset of oil film instability can be as much as ±20 per cent, depending on the steady state operating position. This finding shows that in order to minimize the effect of manufacturing tolerances on system stability, the hydrodynamic journal bearing system should be designed to operate at a modified Sommerfeld number greater than 0.1, where the effects of manufacturing tolerances on system stability are negligible.