泵入型平面螺旋槽气体止推轴承气膜特性研究  

Study on Gas Film Characteristics of In-pump Style Gas Lubricated Spiral Grooved Thrust Bearing

作　　者：赖天伟[1] 尤宏良 陈双涛[1] 刘炅辉[1] 侯予[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049 [2]中航沈飞民用飞机有限责任公司工程研发中心,辽宁沈阳110013

出　　处：《润滑与密封》2014年第4期1-6,14,共7页Lubrication Engineering

基　　金：国家自然科学基金项目(11176023;51306135)

摘　　要：采用CFD数值模拟方法研究气体润滑泵人型螺旋槽止推轴承内气膜的压力场和承载力等静态特性参数，分析台槽宽度比、气膜厚度和转速变化等参数对气膜承载能力的影响。数值计算结果表明，槽端密封区域的压力明显高于气膜内的其他区域，密封区的设计参数对承载力具有很大影响；随着气膜厚度的减小和转速的升高，气膜的承载能力逐渐增大，同时台槽宽度比在0．6—0．8范围内时承载力最大，最佳槽深与气膜厚度比接近于3．0，与经验设计值一致。The static characters of the in-pump style gas-lubricated spiral grooved thrust bearing such as pressure field and loading ca- pacity was presented by computational fluid dynamic numerical method. Designing parameters including ridge-groove width ratio, gas film thickness and rotating speed of the bearing influenced on the loading capacity of the bearing were analyzed. The numerical results indicate that the pressure at the inner part of the groove around the sealing area is above the average pressure in the gas film which forms a large por- tion of the loading capacity. The loading capacity is improved with the increase of speed and the decrease of gas film thickness. There exists a maximal loading capacity with the ridge to groove ratio in the range of 0. 6 -0. 8 and the optimal groove depth to film thickness ratio which agrees well with the designing experiences.

关 键 词：泵入型 螺旋槽 止推轴承 压力场 承载能力 

分 类 号：TH133.35[机械工程—机械制造及自动化] TH117.2