2 选择指南..................................................................20 技术概念....................................................................21 Ewellix 滚柱丝杠简介...............................................21 基本动态承载能力 Ca........................................21 公称疲劳寿命 L10.........................................................................21 使用寿命....................................................................22 当量动态载荷 Fm.............................................................22 基本静态承载能力 C0a.........................................................22 丝杠轴的临界转速 ncr.........................................................23 允许的速度限制 (n d0) 和加速度.........................................................23 效率 η.............................................................................24 反向驱动和制动扭矩 Tb.............................................................................25 脱离扭矩 Tx.............................................................................25 驱动扭矩 Tt.............................................................................25 静态轴向刚度 Rt.............................................................................25 材料、热处理和涂层.............................................................26 工作温度.............................................................................27 丝杠轴屈曲或柱强度 Fc.............................................................27 轴设计.............................................................................28 产品检验和认证.............................................................29 工作环境.................................................................29 轴向游隙和预紧...............................................................30 轴向游隙和预紧...............................................................30 预紧和刚度...............................................................30 预紧扭矩 Tpr................................................................32 预紧扭矩公差...............................................................32 预紧调整.......................................................................34 导程精度和制造公差....................................................36 导程精度....................................................................36 制造公差....................................................................40 计算公式....................................................................44 计算示例....................................................................47