Abstract This article proposes a new thermohydrodynamic (THD) bearing design method based on an improved version of a precedent method. The precedent method used two charts prepared in advance to easily and quickly find two crucial predicted data of the maximum bearing temperature and the effective temperature of the bearing oil film to be used later in an isoviscous Reynolds equation. Three sets of charts were prepared for three different values of journal eccentricity ratio, 0.25, 0.5, and 0.75. Which set should be used was determined based on the preliminarily obtained value of journal eccentricity ratio derived from the initially assumed bearing specifications. Two dimensionless temperature rise parameters and were introduced for the common coordinate variables of the two charts. On the other hand, the new improved method uses a single set of charts for the two crucial temperatures for any value of journal eccentricity ratio. Furthermore, the two coordinate variables for each chart explicitly include the four well-known dimensionless numbers used in THD bearing analyses; that is, Sommerfeld number, bearing aspect ratio (L/D), Peclet number, and dimensionless temperature–viscosity index of the lubricant oil. Compared with some measurements in test rigs of cylindrical bearings, the new improved method is confirmed to predict reasonably accurate bearing performances of cylindrical bearings faster and more easily than the precedent method over a wide range of operating conditions. In conclusion, the new method is simpler, easier, and more straightforward for bearing design use than the precedent method.

中文翻译：

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基于简化热流体润滑理论的轴颈轴承设计图新方法

摘要 本文提出了一种新的热流体力学 (THD) 轴承设计方法，该方法基于先前方法的改进版本。前面的方法使用预先准备的两个图表，可以轻松快速地找到两个关键的轴承最高温度和轴承油膜有效温度的预测数据，以便稍后用于等粘性雷诺方程。为三个不同的轴颈偏心比值（0.25、0.5 和 0.75）准备了三组图表。应该使用哪一组是根据初步获得的轴颈偏心比值确定的，该值是从最初假定的轴承规格得出的。两个无量纲温升参数被引入两个图表的公共坐标变量。另一方面，新的改进方法使用一组图表来表示任何轴颈偏心比值的两个关键温度。此外，每个图表的两个坐标变量明确包括 THD 轴承分析中使用的四个众所周知的无量纲数；即润滑油的 Sommerfeld 数、轴承纵横比 (L/D)、Peclet 数和无量纲温度粘度指数。与圆柱轴承试验台中的一些测量结果相比，新的改进方法被证实可以在较宽的工作条件范围内比以前的方法更快、更容易地预测圆柱轴承的合理准确的轴承性能。总之，新方法比以前的方法更简单、更容易、更直接地用于轴承设计。