多场耦合条件下中空轴式重载静压轴承设计理论与方法

项目名称： 多场耦合条件下中空轴式重载静压轴承设计理论与方法

项目编号： No.51265020

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 机械、仪表工业

项目作者： 于向军

作者单位： 昆明学院

项目金额： 50万元

中文摘要： 静压轴承是大型磨机的核心部件，其在重载、低速恶劣环境下工作；随着球磨机规格的不断增大，对其承载能力、可靠性、使用寿命、维护及能耗提出了更高的要求，为攻克承受重载、尺度巨大的静压轴承设计理论难题与关键技术，本项目采用球磨机筒体内多体运动的离散元仿真分析与多体动力学计算相结合，建立磨机起动/制动工况的非线性多体动力学模型，预测对应工况下轴承所受动载荷，为静压轴承提供准确的边界条件进行流/固/热耦合分析，与采用相似理论设计的比例磨机进行试验研究对比分析，提出轴瓦包角、油腔包角、油腔宽度、油腔偏位角、配合间隙、筒体和端盖的刚度、中空轴的刚度、轴承衬体的刚度和润滑油粘度对油膜承载能力的影响规律；提出静压轴承液压系统参数的确定方法；结合轴承座与轴承衬体的接触非线性分析，提出轴承座和轴承衬体结构参数的优化设计方法；形成大型磨机专用重载静压轴承的设计理论与方法，提升我国大型球磨机静压轴承的自主设计。

中文关键词： 多场耦合；中空轴式静压轴承；载荷谱；多目标优化；承载能力

英文摘要： Working at low speed in the heavy-duty and harsh environment, hydrostatic bearing is one of the key components of the large mill. With the size of the mill machine become larger, hydrostatic bearing must work under larger pressure, and also, more higher standard about its reliability, life span, maintainability and energy consumption are requested by users. To master the design philosophy and the key technology of the large, heavy-duty hydrostatic bearing, this project establish the nonlinear multi-body dynamics model by combining the discrete element simulation analysis method and the multi-body dynamics algorithm. Start and brake cases are simulated by using these two mathematic model above, and also, the dynamic load of bear at the two work cases are predicted. These numeric simulation results provide the accurate boundary condition to the further fluid-structure-thermo coupling analysis. The corresponding experimental results obtained on the scale mill machine, which designed using the theory of similarity, are compared with the numeric solution elaborately. Many factors, such as the bearings angle, the angle, width and the deviation angle of the oil chamber, the fit clearance, the stiffness of the cylinder, cover and the hollow shaft, the stiffness and the lubricating oil viscosity of the bearing lining bod

英文关键词： multi-field coupling；hydrostatic bearing of hollow shaft；load spectrum；Multi-objective optimization；bearing capacity