叠片式气体箔片推力轴承热特性分析
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摘要
叠片式气体箔片推力轴承具有制造工艺简单、散热能力强等优点,针对该新型轴承提出了相应的热特性分析模型,通过数值仿真分析得到轴承气膜及各元件的温度,并对关键影响参数进行了重点分析.研究结果表明:由于气膜在半径较大位置处的线速度大,其剪切产热效果明显,温度越高,气膜的高温区分布在靠近周向末端和顶箔侧;气膜、顶箔和推力盘温度均会随推力盘转速和轴承载荷的增大而升高;向箔片结构中通入冷却气流可以获得良好的降温效果,轴承温度随着箔片内通入冷却气流量的增大,先迅速下降后趋于平缓.
Laminated gas foil thrust bearing has the advantages of simple manufacturing process and strong heat dissipation capability and a thermohydrodynamic model is proposed for this gas foil thrust bearing in this study. The temperature of the film and each component were obtained through numerical simulation analysis, and the key parameters were analyzed. The research shows that the higher the velocity of the film at the larger radius, the more obvious the energy dissipation and the higher the temperature. The high temperature region of the film was distributed near the circumferential end and the top foil. The temperature of the film, top foil and thrust plate increased with a rise in the speed of the thrust disk and the bearing load. The temperature of the bearing first droped rapidly and then tended to be stable with the increase of the cooling airflow inside the foil, and the cooling effect of the airflow was obvious.
Laminated gas foil thrust bearing has the advantages of simple manufacturing process and strong heat dissipation capability and a thermohydrodynamic model is proposed for this gas foil thrust bearing in this study. The temperature of the film and each component were obtained through numerical simulation analysis, and the key parameters were analyzed. The research shows that the higher the velocity of the film at the larger radius, the more obvious the energy dissipation and the higher the temperature. The high temperature region of the film was distributed near the circumferential end and the top foil. The temperature of the film, top foil and thrust plate increased with a rise in the speed of the thrust disk and the bearing load. The temperature of the bearing first droped rapidly and then tended to be stable with the increase of the cooling airflow inside the foil, and the cooling effect of the airflow was obvious.
引文
[1]Shu Xingjun,Xu Gang,Zhen Yueqing,et al.Engineering experimental investigation on the performance of large load capacity air foil bearing[J].Lubrication Engineering,2017,42(4):125-131(in Chinese)[舒行军,徐刚,郑越青,等.大承载波箔型空气动压轴承性能的工程试验研究[J].润滑与密封,2017,42(4):125-131].doi:10.3969/j.issn.0254-0150.2017.04.024.
[2]Xu Gang,Shu Xingjun,Zhen Yueqing,et al.Engineering application experimental investigation of air foil journal bearing[J].Bearing,2017(3):31-35(in Chinese)[徐刚,舒行军,郑越青,等.气体动压箔片径向轴承工程应用试验研究[J].轴承,2017(3):31-35].
[3]Emerson T P.Application of foil air bearing turbomachinery in aircraft environmental control systems[J].Control Systems,1978,100(11):111-111.
[4]Walton J F,Hesmat H.Application of foil bearings to turbomachinery including vertical operation[J].Journal of Engineering for Gas Turbines and Power-Transactions of the Asme,2002,124(4):1032-1041.doi:10.1115/1.1392986.
[5]Wang Wei,Li Xiaojiang,Zeng Qiang,et al.Stability analysis for fully hydrodynamic gas-lubricated protuberant foil bearing in high speed turbomachinery[J].Journal of Xi'An JiaotTong University,2017,51(8):84-89(in Chinese)[王伟,李晓疆,曾强,等.高速透平机械全金属鼓泡箔片动压气体轴承稳定性研究[J].西安交通大学学报,2017,51(8):84-89].
[6]Childs D W.Discussion:“Advancements in the performance of aerodynamic foil journal bearings:high speed and load capability”(Heshmat,H.,1994,ASME J.Tribol.,116,pp.287-294)[J].Journal of Tribology,1994,116(2):294-294.
[7]Heshmat H.Advancements in the performance of aerodynamic foil journal bearings:high speed and load capability[J].Journal of Tribology,1994,116(2):287-294.doi:10.1115/1.2927211.
[8]Dellacorte C.A new foil air bearing test rig for use to 700℃and 70,000 rpm[J].Tribology Transactions,1998,41(3):335-340.doi:10.1080/10402009808983756.
[9]Dellacorte C,Fellenstein J A,Benoy P A.Evaluation of advanced solid lubricant coatings for foil air bearings operating at 25°and 500℃[J].Tribology Transactions,1999,42(2):338-342.doi:10.1080/10402009908982226.
[10]Salehi M,Swanson E,Heshmat H.Thermal features of compliant foil bearings-theory and experiments[J].Journal of Tribology-Transactions of the Asme,2001,123(3):566-571.doi:10.1115/1.1308038.
[11]Peng Z C,Khonsari M M.A Thermohydrodynamic analysis of foil journal bearings[J].Journal of Tribology,2006,128(3):534-541.doi:10.1115/1.2197526.
[12]Feng K,Kaneko S.Thermohydrodynamic study of multiwound foil bearing using lobatto point quadrature[J].Journal of Tribology,2009,131(2):021702-021702.doi:10.1115/1.3070579.
[13]Feng K,Kaneko S.A Thermohydrodynamic sparse mesh model of bump-type foil bearings[J].Journal of Engineering for Gas Turbines and Power,2013,135(2):022501-022501.doi:10.1115/1.4007728.
[14]Kim T H,San Andrés L.Thermohydrodynamic model predictions and performance measurements of bump-type foil bearing for oilfree turboshaft engines in rotorcraft propulsion systems[J].Journal of Tribology,2009,132(1):011701-011701-11.
[15]Lee D,Kim D.Thermohydrodynamic analyses of bump air foil bearings with detailed thermal model of foil structures and rotor[J].Journal of Tribology,2010,132(2):021704-021704-12.doi:10.1115/1.4001014.
[16]Lee D,Kim D.Three-dimensional thermohydrodynamic analyses of rayleigh step air foil thrust bearing with radially arranged bump foils[J].Tribology Transactions,2011,54(3):432-448.doi:10.1080/10402004.2011.556314.
[17]Lee D,Kim D,Sadashiva R P.Transient thermal behavior of preloaded three-pad foil bearings:modeling and experiments[J].Journal of Tribology,2011,133(2):021703-021703-11.doi:10.1115/1.4003561.
[18]Liu Liangjun.Theoretical considerations of hydrodynamic and thermal characteristics of gas foil thrust bearings[D].Changsha:Hu Nan University.2015(in Chinese)[刘良军.弹性箔片气体动压推力轴承的静动态特性和热特性研究[D].长沙:湖南大学,2015.].
[19]Feng Kai,Deng Zhihong,Zhao Xueyuan,et al.Test on static and temperature characteristics of gas foil bearing[J].Journal of Aerospace Power,2017,32(6):1394-1399(in Chinese)[冯凯,邓志洪,赵雪源,等.箔片气体轴承静态特性和温度特性试验[J].航空动力学报,2017,32(6):1394-1399].
[20]Heshmat H,Walowit J A,Pinkus O.Analysis of gas-lubricated foil journal bearings[J].Journal of Lubrication Technology,1983,105(4):647-655.doi:10.1115/1.3254697.
[21]Khonsari M M,Jang J Y,Fillon M.On the generalization of thermohydrodynamic analyses for journal bearings[J].Journal of Tribology,1996,118(3):571-579.doi:10.1115/1.2831576.
[22]Dowson D,Hudson J D,Hunter B,et al.Paper 3:An experimental investigation of the thermal equilibrium of steadily loaded journal bearings[J].Proceedings of the Institution of Mechanical Engineers,Conference Proceedings,1966,181(2):70-80.doi:10.1243/PIME_CONF_1966_181_034_02.
[2]Xu Gang,Shu Xingjun,Zhen Yueqing,et al.Engineering application experimental investigation of air foil journal bearing[J].Bearing,2017(3):31-35(in Chinese)[徐刚,舒行军,郑越青,等.气体动压箔片径向轴承工程应用试验研究[J].轴承,2017(3):31-35].
[3]Emerson T P.Application of foil air bearing turbomachinery in aircraft environmental control systems[J].Control Systems,1978,100(11):111-111.
[4]Walton J F,Hesmat H.Application of foil bearings to turbomachinery including vertical operation[J].Journal of Engineering for Gas Turbines and Power-Transactions of the Asme,2002,124(4):1032-1041.doi:10.1115/1.1392986.
[5]Wang Wei,Li Xiaojiang,Zeng Qiang,et al.Stability analysis for fully hydrodynamic gas-lubricated protuberant foil bearing in high speed turbomachinery[J].Journal of Xi'An JiaotTong University,2017,51(8):84-89(in Chinese)[王伟,李晓疆,曾强,等.高速透平机械全金属鼓泡箔片动压气体轴承稳定性研究[J].西安交通大学学报,2017,51(8):84-89].
[6]Childs D W.Discussion:“Advancements in the performance of aerodynamic foil journal bearings:high speed and load capability”(Heshmat,H.,1994,ASME J.Tribol.,116,pp.287-294)[J].Journal of Tribology,1994,116(2):294-294.
[7]Heshmat H.Advancements in the performance of aerodynamic foil journal bearings:high speed and load capability[J].Journal of Tribology,1994,116(2):287-294.doi:10.1115/1.2927211.
[8]Dellacorte C.A new foil air bearing test rig for use to 700℃and 70,000 rpm[J].Tribology Transactions,1998,41(3):335-340.doi:10.1080/10402009808983756.
[9]Dellacorte C,Fellenstein J A,Benoy P A.Evaluation of advanced solid lubricant coatings for foil air bearings operating at 25°and 500℃[J].Tribology Transactions,1999,42(2):338-342.doi:10.1080/10402009908982226.
[10]Salehi M,Swanson E,Heshmat H.Thermal features of compliant foil bearings-theory and experiments[J].Journal of Tribology-Transactions of the Asme,2001,123(3):566-571.doi:10.1115/1.1308038.
[11]Peng Z C,Khonsari M M.A Thermohydrodynamic analysis of foil journal bearings[J].Journal of Tribology,2006,128(3):534-541.doi:10.1115/1.2197526.
[12]Feng K,Kaneko S.Thermohydrodynamic study of multiwound foil bearing using lobatto point quadrature[J].Journal of Tribology,2009,131(2):021702-021702.doi:10.1115/1.3070579.
[13]Feng K,Kaneko S.A Thermohydrodynamic sparse mesh model of bump-type foil bearings[J].Journal of Engineering for Gas Turbines and Power,2013,135(2):022501-022501.doi:10.1115/1.4007728.
[14]Kim T H,San Andrés L.Thermohydrodynamic model predictions and performance measurements of bump-type foil bearing for oilfree turboshaft engines in rotorcraft propulsion systems[J].Journal of Tribology,2009,132(1):011701-011701-11.
[15]Lee D,Kim D.Thermohydrodynamic analyses of bump air foil bearings with detailed thermal model of foil structures and rotor[J].Journal of Tribology,2010,132(2):021704-021704-12.doi:10.1115/1.4001014.
[16]Lee D,Kim D.Three-dimensional thermohydrodynamic analyses of rayleigh step air foil thrust bearing with radially arranged bump foils[J].Tribology Transactions,2011,54(3):432-448.doi:10.1080/10402004.2011.556314.
[17]Lee D,Kim D,Sadashiva R P.Transient thermal behavior of preloaded three-pad foil bearings:modeling and experiments[J].Journal of Tribology,2011,133(2):021703-021703-11.doi:10.1115/1.4003561.
[18]Liu Liangjun.Theoretical considerations of hydrodynamic and thermal characteristics of gas foil thrust bearings[D].Changsha:Hu Nan University.2015(in Chinese)[刘良军.弹性箔片气体动压推力轴承的静动态特性和热特性研究[D].长沙:湖南大学,2015.].
[19]Feng Kai,Deng Zhihong,Zhao Xueyuan,et al.Test on static and temperature characteristics of gas foil bearing[J].Journal of Aerospace Power,2017,32(6):1394-1399(in Chinese)[冯凯,邓志洪,赵雪源,等.箔片气体轴承静态特性和温度特性试验[J].航空动力学报,2017,32(6):1394-1399].
[20]Heshmat H,Walowit J A,Pinkus O.Analysis of gas-lubricated foil journal bearings[J].Journal of Lubrication Technology,1983,105(4):647-655.doi:10.1115/1.3254697.
[21]Khonsari M M,Jang J Y,Fillon M.On the generalization of thermohydrodynamic analyses for journal bearings[J].Journal of Tribology,1996,118(3):571-579.doi:10.1115/1.2831576.
[22]Dowson D,Hudson J D,Hunter B,et al.Paper 3:An experimental investigation of the thermal equilibrium of steadily loaded journal bearings[J].Proceedings of the Institution of Mechanical Engineers,Conference Proceedings,1966,181(2):70-80.doi:10.1243/PIME_CONF_1966_181_034_02.