滚动轴承.静载荷额定值

[中文适用范围]： 本国际标准规定了相关 ISO 标准所示尺寸范围内滚动轴承基本额定静载荷和当量静载荷的计算方法，滚动轴承由当代常用的高质量淬硬轴承钢按照良好制造规范制造。 就滚动接触面的形状而言，基本上采用常规设计。 对于由于应用条件和/或内部设计，滚动体和套圈滚道之间的接触面积有相当大的截断的轴承，根据本国际标准进行的计算不会产生令人满意的结果。 当应用条件导致轴承中的正常载荷分布出现偏差时，例如不对中、预载或超大间隙，或者使用特殊表面处理或涂层的情况，也适用相同的限制。 如果有理由假设存在这种情况，用户应咨询轴承制造商以获取建议和静态当量载荷的评估。 本国际标准不适用于滚动元件直接在轴或外壳表面上运行的设计，除非该表面在所有方面与其所取代的轴承表面等效。 在本国际标准中提及时，双列向心轴承和双向推力轴承被假定为对称的。 此外，还给出了在重载应用中应用的静态安全系数的指南。 [外文原描述]： ISO 76:2006 specifies methods of calculating the basic static load rating and the static equivalent load for rolling bearings within the size ranges shown in the relevant ISO standards, manufactured from contemporary, commonly used, high quality, hardened bearing steel in accordance with good manufacturing practice and basically of conventional design as regards the shape of the rolling contact surfaces. Calculations carried out in accordance with ISO 76:2006 do not yield satisfactory results for bearings in which, because of application conditions and/or internal design, there is a considerable truncation of the area of contact between the rolling elements and the ring raceways. The same limitation applies where application conditions cause deviations from a normal load distribution in the bearing, for example misalignment, preload or extra large clearance or where special surface treatment or coatings are used. Where there is reason to assume that such conditions prevail, the user should consult the bearing manufacturer for recommendations and the evaluation of the static equivalent load. ISO 76:2006 is not applicable to designs where the rolling elements operate directly on a shaft or housing surface, unless that surface is equivalent in all respects to the bearing surface it replaces. Double-row radial bearings and double-direction thrust bearings are, when referred to in ISO 76:2006, presumed to be symmetrical. In addition, guidelines are given for static safety factors to be applied in heavy loaded applications.