:Q SCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING LESSON FOUR FOUNDATIONS OF bearing轴承 MACHINE DESIGN (PARTD conical roller Bearings With rolling Contact 圆锥滚柱 In bearings with rolling contact, the shaft is needle itt directly or indirectly supported by rolling elements, cylindrical such as balls, cylindrical or conical rollers, or roller needles(ie, cylindrical rollers with a high I/ D ratio).圆柱滚柱 The occasionally encountered name " antifrictionantifriction bearings"suggests that this type has little or no bearing friction. This is erroneous, since the friction is‖减摩轴承 merely of another nature than in journal bearings. In journal bearing bearings with rolling contact, friction losses are‖颈轴承 caused by the elastic deformation of the surfaces in滑动轴承 rolling contact,, sliding friction of rolling elements‖cage保持架 with cages, retaining rings and seals, or with one retaining ring another, and also by some shear of lubricant 档圈SCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING LESSON FOUR FOUNDATIONS OF MACHINE DESIGN (PART l) Bearings With Rolling Contact In bearings with rolling contact, the shaft is directly or indirectly supported by rolling elements, such as balls, cylindrical or conical rollers, or needles (i.e., cylindrical rollers with a high L/D ratio). The occasionally encountered name " antifriction bearings" suggests that this type has little or no friction. This is erroneous, since the friction is merely of another nature than in journal bearings. In bearings with rolling contact, friction losses are caused by the elastic deformation of the surfaces in rolling contact, sliding friction of rolling elements with cages, retaining rings and seals, or with one another, and also by some shear of lubricant. conical roller 圆锥滚柱 needle 滚针 cylindrical roller 圆柱滚柱 antifriction bearing 减摩轴承 cage 保持架 retaining ring 档圈 bearing 轴承 journal bearing 颈轴承 滑动轴承