支座松动故障下滑动轴承油膜空穴迁移规律研究  

The Study of Migration of Oil Film on Journal Bearing of Rotating Machine with Loose of Bearing

作　　者：凌寒[1] 贺利乐[1] 张平[1] LING Han;HE Li-le;ZHANG Ping(School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Shaanxi Xi’an 710055, China)

机构地区：[1]西安建筑科技大学机电工程学院,陕西西安710055

出　　处：《机械设计与制造》2019年第2期110-113,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51405366)

摘　　要：针对旋转机械支承松动故障识别困难问题,研究滑动轴承的油膜空穴迁移规律。建立了一端松动转子-轴承系统模型,采用短轴承下的非线性油膜力模型和JFO边界条件,用数值求解的方法对支座松动故障转子-轴承系统进行仿真模拟计算,得到了支座松动下的油膜空穴迁移规律。仿真结果表明:一端支承松动故障下的松动端油膜破裂边界迁移过程是不连续的,松动支座的无规则运动是引起空穴迁移发生异常的主要因素;松动端空穴体积会随挤压速度的增加而减小。研究结果为支座松动故障诊断提了供理论依据。Aimed at the misdiagnosis shortage of rotating machinery pedestal looseness fault recognition, the cavitation of Journal bearing oil film is studied. The rotor - bearing system model with looseness fault on one pedestal is established, considering the nonlinear oil film force model in the case of short bearing and JFO boundary conditions. Using numerical solution method simulates the rotor bearing systems with the pedestal looseness fault to get the migration law of the rotor-bearing system of oil film. Simulation results show that the process of oil film rupture boundary migration at the loose end is discontinuous;in the process a loose bearing is the main factor causing cavitation migration anomalies;at the looseness pedestalcavitation will decrease with the increase of the extrusion speed , which provide theoretical basis for the pedestal looseness fault diagnosis.

关 键 词：支座松动 滑动轴承 油膜 空穴 

分 类 号：TH16[机械工程—机械制造及自动化] TH165.3