第十一章滚动轴承解说.ppt

第十一章 Ball and roller bearings滚动轴承 § 11-1 General considerations 概述 § 11-2 Option of the types for rolling bearings 滚动轴承的类型选择 § 11-3 Option of the sizes for rolling bearings (Carrying-load ability calculations) 滚动轴承尺寸选择(承载能力计算） § 11-4 Design arrangements for rolling bearings 滚动轴承组合设计 一、 Structure , materials and characteristics 构造、材料和特点 二、 Study task 任务 ① Understanding standards of the bearings and properly selecting their types and dimensions 熟悉标准、正确选用(类型、尺寸） ②Reasonably treating the relation between the bearings and other elements (design arrangements) 处理好与周围零件的关系(组合设计） §11-2 Selection of the types for rolling bearings 滚动轴承的类型选择 一、Types of rolling bearing 分类 二、Code of rolling bearing 轴承代号 三、Selection of types of rolling bearing 类型选择 二、轴承代号Code of bearings 1、 Prefix and post codes 前置代号和后置代号 2、 Basic codes 基本代号 1、 Prefix and post codes前置代号和后置代号 2、 Basic codes 基本代号 2） Dimensional series codes尺寸系列代号 3） Bore diameter series codes内径系列代号 三、 Options of bearing types类型选择 1、 With respect to loads carried 根据载荷性质 The loads differ in magnitude, direction and feature 2、 With respect to limit speed根据极限转速 §11-3 Selection of the sizes for rolling bearings (Carrying-load ability calculations)滚动轴承尺寸选择 （承载能力计算）  2） Fixed ring Stable zero-plus alternating cycle stress固定套圈：稳定脉动循环应力 二、 Failure types and design criteria 失效形式和计算准则 1、 Failure types 失效形式 Fatigue spotting 点蚀 Plastic deformation（ indenting） 塑性变形 Excess wear 磨粒磨损、粘着磨损 Cage breakdown 套圈、保持架破裂 Fatigue spotting 三、 Life calculations 寿命计算： 1、 Basic concepts 基本概念 ① Bearing life 轴承寿命：Before the first evidence of fatigue develops on any element of the bearing, the total number of revolutions the bearing will run or operating hours under certain operating rotating speed. 轴承中任一元件出现疲劳点蚀前运转的总转数或一定转速下的工作小时数。 ② Basic rati