Purpose

The purpose of this paper is to study the film-forming capacity of logarithmic crowned roller for tapered roller bearing (TRB) and to design a tapered roller profile based on an elastohydrodynamic lubrication model.

Design/methodology/approach

A coupled model, incorporating a quasi-static model of TRBs and an elastohydrodynamic lubrication model was developed to investigate the load distribution of TRB and to evaluate the lubrication state of tapered roller/raceway contact.

Findings

The model is verified with published literature results. Parametric analysis is conducted to investigate the effect of crown drop on azimuthal load distribution of the roller, film thickness and pressure distribution in the contact area. The result shows that crown drop has little influence on the azimuthal load distribution; also, the film thickness and the pressure distribution are asymmetric. When the tapered roller is designed and manufactured, the crown drop of the small end should be larger than that in the large end.

Originality/value

Precise roller profile design is conducive to improve the fatigue life of TRBs. Currently, most crown design methods neglect the influence of lubrication, which can lead to a non-suitable roller profile. Therefore, the present work is undertaken to optimize roller profiles based on lubrication theory.

中文翻译：

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基于弹流润滑模型的圆锥滚子轴承对数凸面滚子设计

目的

本文的目的是研究圆锥滚子轴承 (TRB) 用对数凸面滚子的成膜能力，并设计基于弹性流体动力润滑模型的圆锥滚子轮廓。

设计/方法/方法

开发了一个结合了 TRB 准静态模型和弹性流体动力润滑模型的耦合模型，以研究 TRB 的载荷分布并评估圆锥滚子/滚道接触的润滑状态。

发现

该模型已通过已发表的文献结果进行验证。通过参数分析研究了凸度下降对滚子方位角载荷分布、接触区油膜厚度和压力分布的影响。结果表明，拱顶落差对方位角载荷分布影响不大；此外，薄膜厚度和压力分布是不对称的。圆锥滚子设计制造时，小端的凸度降应大于大端的凸度降。

原创性/价值

精确的滚子轮廓设计有利于提高TRBs的疲劳寿命。目前，大多数凸面设计方法都忽略了润滑的影响，这会导致不合适的滚子轮廓。因此，目前的工作是基于润滑理论来优化滚子轮廓。