【作者】 王翔；

【导师】 申光宪；

【作者基本信息】 燕山大学 ， 机械设计及理论， 2003， 硕士

【摘要】 现代高速线材精轧机为满足线材产品的大量需求，不断向高速化方向发展，其代表轧机有八十年代从德国DEMAG公司引进的侧交15°/75°型φ200悬臂式精轧机。然而，φ200悬臂式精轧机从试生产至今，频繁发生油膜轴承短寿烧损事故，造成年经济损失达一百多万元，严重困扰生产。 用间接测定轧制力和直接测定油膜轴承润滑油温度的方案对φ200悬臂式精轧机进行现场实测轧制力和油温，查明导致油膜轴承短寿烧损问题的原因。 利用机构学和动力学理论，分析φ200悬臂式精轧机辊系的动态行为。针对实验查明的油膜轴承短寿烧损原因共给出五种解决方案，分别为自位式、拉杆式、斜铁式、偏心套式和油膜—滚子组合轴承式。概述每种方案的理论依据并给出改造示意图，经过认真综合、比较，最后确定选用油膜—滚子组合轴承方案。 建立油膜—滚子组合轴承载荷特性的匹配原理。在φ200悬臂式精轧机最恶劣工况条件下，用ANSYS有限元法软件模拟计算辊轴辊颈在油膜轴承宽度方向上的偏斜量，并用滚动轴承载荷三维分布的边界元法专用程序3—DECBBEM及相关前后处理程序计算滚子轴承的压扁量。利用计算结果给出油膜—滚子组合轴承方案中油膜轴承与滚子轴承中心线的偏心距。 针对φ200悬臂式精轧机现有辊系结构，开发设计油膜—滚子组合轴承。确定改造方案的具体结构，即对每个改造件都给出改造说明和改造后的结构简图。 油膜—滚子组合轴承，不仅防止原油膜轴承在重载下的油膜破坏，还显著强化轴承的承载能力，可解决单一油膜轴承烧损短寿问题，具有重要的学术意义和工程实用价值。更多还原

【Abstract】 In order to meet the great need of providing wire products, modern high-speed wire mills will develop to be of higher working speed. The typical kind of mills is lateral intersection 15°/75°φ200 cantilever finishing mill. However, from its pilot to now, there are frequent occurrences of the shortened longevity and burning damage accidents of oil film bearing of φ 200 cantilever finishing mill. The result is more than one million of economic losses every year and hardship of production.A new scheme of indirectly measuring rolling force and directly measuring temperature of lubricating oil is used to measure the magnitude of rolling force and temperature of lubricating oil. All these measurements above are to study the reasons of shortened longevity and burning damage accidents of oil film bearing.With the theory of mechanism and dynamics, the dynamic behavior of roll system of φ 200 cantilever finishing mill has been analyzed. According to these reasons, five projects which can solve the problem has been presented: self-aligning, puller, lean-iron, eccentric-cover and oil film-roller bearing. The paper gives the references and drawing of each project. After the comparison of synthetic function among the five projects, oil film-roller bearing project has been chosen.The theoretical modal of oil film-roller bearing’s load was set up. With the worst working conditions, the FEM software ANSYS was used to calculate the deflection of roll shaft in the width direction of oil film bearing as well as the software program 3-DECBBEM and corresponding supporting programs are used to calculate the press flat of the roller bearing in the width direction of roller bearing. The result will be used to determine excursion between center line of oil film bearing and roller bearing.Oil film-roller bearing is designed and produced in accordance with the existing construct of roll system of φ 200 cantilever finishing mill. Then, part of detailed structure of oil film-roller bearing will be determined. The paper will give the declaration and drawing of each component reformed.Oil film-roller bearing can not only prevent film’s destruction when oil film bearing is on heavy load, but also extremely reinforce capacity load bearing of oil film bearing. It can solve the problem of shortened longevity and burning damage accidents of oil film bearing. Above all, this will have important academic significance and value of engineering utilitarian.更多还原