向心透平发电膨胀机静压气体轴承设计与承载特性分析  

Design and Loading Characteristics Analysis of Aerostatic Bearings for Radial Inflow Turbogenerator

作　　者：武潭 蔡树亭 高晓蕾[2] 郭保国 张黎君 WU Tan;CAI Shuting;GAO Xiaolei;GUO Baoguo;ZHANG Lijun(School of Energy and Power Engineering,Zhengzhou University of Light Industry,Zhengzhou Henan 450001,China;School of Mechanics and Safety Engineering,Zhengzhou University,Zhengzhou Henan 450001,China;Henan Boiler and Pressure Vessel Inspection Technology Research Institute,Zhengzhou Henan 450016,China;School of Chemical Engineering,Henan Technical Institute,Zhengzhou Henan 450001,China)

机构地区：[1]郑州轻工业大学能源与动力工程学院,河南郑州450001 [2]郑州大学力学与安全工程学院,河南郑州450001 [3]河南省锅炉压力容器检验技术科学研究院,河南郑州450016 [4]河南应用技术职业学院化学工程学院,河南郑州450001

出　　处：《润滑与密封》2024年第6期145-153,共9页Lubrication Engineering

基　　金：2022年教育部产学合作协同育人项目(220506298074600,220806517115750);2021年度郑州轻工业大学博士启动科研基金项目(2021BSJJ040);2024年度河南省科技攻关项目(242102221038,242102320189);郑州大学2023年度全国大学生创新创业训练计划资助项目(2023CXCY446);郑州大学2022年度校级教育教学改革研究与实践项目(2022ZZUJG005)。

摘　　要：为提升有机朗肯循环(organic Rankine cycle,ORC)系统向心透平发电膨胀机静压气体轴承的承载力与刚度,采用表压比法设计了以R245fa为润滑工质的静压气体轴承,分析转子偏心率、供气孔尺寸、进气压力对静压气体轴承承载力与刚度的影响。实验结果表明:在相同供气压力下,轴承承载力与刚度随着转速的增大而增大;在相同转速下,0.7 MPa供气压力相对于其他气体供气压力轴承的承载力与刚度略高;静压气体轴承的偏心率越大承载力越大;相同供气孔直径下,静压气体轴承的承载力与刚度随着转速的升高而升高;随供气孔直径增大,静压气体轴承的承载力和刚度也随之增大。In order to improve the load carrying capacity and stiffness of the aerostatic bearings of the radial inflow turbogenerator for the organic Rankine cycle(ORC) system,the aerostatic bearings with R245fa as the lubricating medium was designed by gauge pressure ratio method,and the effects of rotor eccentricity,orifice size and inlet pressure on the load carrying capacity and stiffness of the aerostatic bearings were analyzed.The results show that the bearing load capacity and stiffness increase with the increase of speeds under the same air supply pressures.At the same speed,the load capacity and stiffness of the bearing at the air supply pressure of 0.7 MPa is slightly higher than those at other air supply pressures.The greater the eccentricity of the aerostatic bearings,the greater the load carrying capacity.The load carrying capacity and stiffness of the aerostatic bearings increases with the increase of rotational speeds under the same air supply hole diameter.The larger the air supply hole diameters,the greater the bearing capacity and stiffness of the aerostatic bearings.

关 键 词：静压气体轴承 膨胀机 承载力 刚度 有机朗肯循环 

分 类 号：TH133.31[机械工程—机械制造及自动化]