静动压油膜轴承油腔结构优化设计  

Optimal Design of Oil Cavity Structure of Hybrid Oil-Film Bearings

作　　者：张婉茹 王建梅[1] ZHANG Wanru;WANG Jianmei(Engineering Research Center of Heavy Machinery Ministry of Education,Taiyuan University of Science and Technology,Taiyuan 030024,China)

机构地区：[1]太原科技大学重型机械教育部工程研究中心,太原030024

出　　处：《轴承》2024年第2期23-29,共7页Bearing

基　　金：国家自然科学基金资助项目(51875382)。

摘　　要：静动压油膜轴承作为无头轧制粗轧机组支承传动轴的部件,在低速重载工况下建立动压油膜困难,静压支承供油系统需长期连续工作。静压油腔压力流量特性直接影响静压支承性能,设计满足工况的静压油腔结构并与供油参数的相互匹配尤为重要。设计了一种非对称三油腔静动压油膜轴承结构,以静压油腔包角、宽度、中心间距、周向夹角、节流器尺寸为影响因素,通过封油面流量法建立以静压油腔压力、流量为目标函数的优化模型,基于正交试验法对轴承结构参数进行优化设计及多因素方差分析。研究结果表明:非对称三油腔轴承,采用恒流量供油,静压油腔压力大;减小静压油腔包角、宽度,周向夹角,增大中心间距有利于提高静压油腔压力和承载力。The hybrid oil-film bearings are components supporting the drive shaft of endless roughing mill.Under low speed and heavy load conditions,it is difficult to establish hydrodynamic oil-film and the hydrostatic support oil supply system needs to work continuously for a long time.The pressure-flow characteristics of hydrostatic oil cavity directly affect the performance of hydrostatic support.It is particularly important to design the structure of hydrostatic oil cavity that meets working conditions and match it with oil supply parameters.An asymmetric three oil cavity hybrid oil-film bearing structure is designed,with wrapping angle,width,center distance,circumferential included angle and throttle size of hydrostatic oil cavity as influencing factors.An optimization model is established using sealing oil surface flow method,with hydrostatic oil cavity pressure and flow rate as objective functions.Based on orthogonal test method,the structural parameters of the bearings are optimized,and the multi-factor variance analysis is carried out.The research results show that asymmetric three oil cavity bearing adopts constant flow oil supply,with high hydrostatic oil cavity pressure;reducing wrapping angle,width and circumferential included angle of hydrostatic oil cavity,and increasing center distance are beneficial for improving the pressure and load capacity of hydrostatic oil cavity.

关 键 词：滑动轴承 油膜轴承 非对称 油腔 优化设计 正交试验 

分 类 号：TH133.31[机械工程—机械制造及自动化]