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 ${\kappa }_1$ and ${\kappa }_2$ 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.

本文提出了一种新的热流体动力学（THD）轴承设计方法，该方法基于先验方法的改进版本。先前的方法使用了预先准备的两个图表来轻松快速地找到两个关键的预测数据，即最高轴承温度和轴承油膜的有效温度，这些数据稍后将在等粘度雷诺方程中使用。为三种不同的轴颈偏心率值0.25、0.5和0.75准备了三组图表。根据从最初假定的轴承规格中得出的轴颈偏心率的初步确定值，确定应使用哪一组轴承。两个无因次温升参数${\kappa }_{\mathrm{1个}}$ 和 ${\kappa }_2$介绍了两个图表的通用坐标变量。另一方面，对于轴颈偏心率的任何值，新的改进方法对两个关键温度使用一组图表。此外，每个图表的两个坐标变量明确包括在THD轴承分析中使用的四个众所周知的无量纲数。也就是说，索末菲数，轴承长宽比（L / D），佩克数和润滑油的无量纲温度-粘度指数。与圆柱轴承试验台中的一些测量结果相比，新方法得到了证实，可以在较宽的工作条件下比先前的方法更快，更轻松地预测圆柱轴承的合理准确的轴承性能。总之，与以前的方法相比，这种新方法对于轴承设计的使用更加简单，容易和直接。