单螺杆压缩机星轮水润滑轴承接触应力分析  

Analysis of Contact Stress of Star Wheel Water Lubricated Bearings in Single Screw Compressors

作　　者：侯方勇 张平[2] 吴伟烽 HOU Fang-yong;ZHANG Ping;WU Wei-feng(Xingzhi College,Xi′an University of Finance and Economics,Xi′an 710038,China;School of Energy and Power Engineering,Xi′an Jiaotong University,Xi′an 710049,China)

机构地区：[1]西安财经大学行知学院,陕西西安710038 [2]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《压缩机技术》2025年第1期36-38,59,共4页Compressor Technology

基　　金：国家自然科学基金资助项目(52076162);陕西高校青年创新团队;秦创原“科学家+工程师”队伍建设(2024QCY-KXJ-004)。

摘　　要：水润滑轴承是单螺杆压缩机的热点技术,目前还不成熟。因气体力作用于星轮齿对星轮轴形成轴向气体力和弯矩,单螺杆压缩机的星轮轴承需承受轴向力和径向作用力。开展了水润滑单螺杆压缩机的星轮轴承受力的数值仿真模拟,得到不同轴承规格下星轮轴承接触面的接触应力大小。结果表明:轴承直径越大,接触面的最大接触应力和平均接触应力越小;轴承长度越长,接触面的平均接触应力越小,但最大接触应力先增大后减小。从水润滑液膜角度,轴承尺寸越大,变形和装配误差引起的轴承间隙变化将会增加,不利于轴承润滑水膜的形成。因此,在给定受力条件下,水润滑轴承的设计尺寸存在最佳值。Developing water lubricated bearings is a hot technology for single screw compressors.Due to the action of gas force on the planetary wheel teeth,axial gas force and bending moment are formed on the wheel shaft,which create axial and radial forces on its bearings.Numerical simulation of the bearing force of the star wheel shaft was carried out in this paper,to investigate the contact stress magnitude covering the contact surface of the water lubricated bearings with different bearing sizes.The results show that the larger the bearing diameter,the smaller the maximum and average contact stresses on the contact surface.The longer the bearing length,the smaller the average contact stress on the contact surface,but the maximum contact stress first increases and then decreases.From the perspective of water lubrication film,when bearing size is increased,the change of bearing clearance would be larger caused by deformation and assembly errors of the shaft assembly,which is harmful to the formation of water lubrication film.Therefore,under given force conditions,there exists an optimal size for water lubricated bearings in design size.

关 键 词：单螺杆压缩机 星轮轴承 数值模拟 接触应力 

分 类 号：TH455[机械工程—机械制造及自动化]