Abstract In this study, we established a performance analysis model of two types of ball continuously variable transmissions (CVT), conformal type and non-conformal type, by modifying the rheological model based on the elastohydrodynamic contact behavior for the existing toroidal traction drive to suit the working mechanism of ball CVTs. The main purpose of this study is, based on our analysis model, to identify the tendency of performance change according to design factors of ball CVTs and to compare the performance between two ball CVTs. Performance was analyzed in terms of torque capability, torque density and efficiency; factors affecting performance were selected through analysis of individual shapes and operating conditions. In this process, all design and performance factors were expressed as dimensionless quantities. It was confirmed that the conformal ball CVT has superior traction capability compared to the non-conformal ball CVT. In addition, by solving an example problem for ball CVT design and describing the process of designing optimal ball CVTs, it was proved that this study is applicable to real on-site problems.

中文翻译：

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球型无级变速器性能评估及保形与非保形比较

摘要 在本研究中，我们根据现有环形牵引传动装置的弹性流体动力接触行为修改流变模型，建立了共形和非共形两种球式无级变速器（CVT）的性能分析模型。球状无级变速器的工作机制。本研究的主要目的是基于我们的分析模型，根据滚珠 CVT 的设计因素确定性能变化的趋势，并比较两种滚珠 CVT 之间的性能。在扭矩能力、扭矩密度和效率方面对性能进行了分析；通过分析个体形状和操作条件来选择影响性能的因素。在此过程中，所有设计和性能因素都表示为无量纲量。与非保形球 CVT 相比，保形球 CVT 具有更好的牵引能力。此外，通过解决球式 CVT 设计的示例问题并描述设计最佳球式 CVT 的过程，证明了该研究适用于实际的现场问题。