正齿轮和斜齿轮负载能力的计算 - 第2部分:表面耐久性（点蚀）的计算

[中文适用范围]： 本文件规定了用于确定渐开线外齿或内齿圆柱齿轮表面承载能力的基本公式。它包括所有影响表面耐久性的公式，可以对其进行定量评估。它主要适用于油润滑传动装置，但也可用于获得（低速）脂润滑传动装置的近似值，只要啮合中始终有足够的润滑剂。给出的公式适用于齿廓符合 ISO 53 中标准化基本齿条的圆柱齿轮。它们也可用于与其他基本齿条共轭的齿，其中实际横向重合度小于 εαn = 2.5。结果与其他方法一致（见参考文献 [5]、[7]、[10]、[12]）。除了第 4 条所述情况外，这些公式不能直接用于评估齿轮齿面损伤类型，例如塑性屈服、划伤、擦伤等。通过允许接触应力确定的负载能力称为“表面负载能力”或“表面耐久性”。如果不适用此范围，请参阅 ISO 6336-1:2019，第 4 条。 [外文原描述]： This document specifies the fundamental formulae for use in the determination of the surface load capacity of cylindrical gears with involute external or internal teeth. It includes formulae for all influences on surface durability for which quantitative assessments can be made. It applies primarily to oil‑lubricated transmissions, but can also be used to obtain approximate values for (slow‑running) grease‑lubricated transmissions, as long as sufficient lubricant is present in the mesh at all times. The given formulae are valid for cylindrical gears with tooth profiles in accordance with the basic rack standardized in ISO 53. They can also be used for teeth conjugate to other basic racks where the actual transverse contact ratio is less than ε α n = 2,5. The results are in good agreement with other methods (see References [5], [7], [10], [12]). These formulae cannot be directly applied for the assessment of types of gear tooth surface damage such as plastic yielding, scratching, scuffing and so on, other than that described in Clause 4. The load capacity determined by way of the permissible contact stress is called the "surface load capacity" or "surface durability". If this scope does not apply, refer to ISO 6336-1:2019, Clause 4.