An elastohydrodynamic model of ferrofluid‐lubricated involute spur gears was established, and transient thermal elastohydrodynamic lubrication (EHL) analysis was conducted using multigrid method and multigrid integral method. The transient lubricant film thickness, pressure, and friction coefficient characteristics of the spur gears were compared under different carrier fluid ferrofluids. Ester‐based H01 ferrofluid was selected to further examine the lubricant film elastohydrodynamic characteristics of the involute spur gears under different loads and speeds. The results indicated that the film thickness and the inlet area pressure were the largest when hydrocarbon‐based E02 ferrofluid was used for lubrication and were the smallest when ester‐based ferrofluid H01 was used for lubrication. When ester‐based H01 ferrofluid was used, the film thickness, the inlet area pressure, and the second pressure peak increased with the increase of speed, and the second pressure peak shifted toward the inlet area. The friction coefficient and the maximum temperature gradually decreased with the increase of speed, and the second pressure peak, the friction coefficient, and the maximum temperature gradually increased with the increase of load, while the film thickness gradually decreased.

中文翻译：

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铁磁润滑渐开线正齿轮对的牛顿热弹性流体动力润滑模型

建立了铁磁润滑渐开线正齿轮的弹性流体力学模型，并采用多网格方法和多网格积分方法进行了瞬态热弹性流体动力润滑（EHL）分析。在不同的载液铁磁流体条件下，比较了正齿轮的瞬态润滑剂膜厚度，压力和摩擦系数特性。选择基于酯的H01铁磁流体来进一步检查渐开线正齿轮在不同负载和速度下的润滑膜弹性流体力学特性。结果表明，当使用烃基E02铁磁流体润滑时，膜厚度和入口面积压力最大，而当使用酯基铁磁流体H01润滑时，膜厚度和入口面积压力最小。当使用基于酯的H01铁磁流体时，膜厚度，入口面积压力和第二压力峰值随速度的增加而增加，并且第二压力峰值向入口面积移动。摩擦系数和最高温度随着速度的增加而逐渐减小，第二压力峰值，摩擦系数和最高温度随着载荷的增加而逐渐增加，而膜厚度逐渐减小。