基于双向流固耦合理论的可倾瓦推力轴承润滑性能研究
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摘要
以双向流固耦合理论为基础,运用CFD技术对某蓄能机组推力轴承进行数值模拟,研究瓦面位置参数及材料对轴承润滑性能的影响。结果表明,瓦面倾角增大,油膜压力及承载增加,且压力中心区沿镜板旋转方向及瓦面径向外侧偏移;油膜间隙减小,压力及承载均增加。弹性模量减小,轴瓦压力梯度变缓,且压力极值中心向瓦侧边缘移动,因而适当降低轴瓦弹性模量,能够有效减少瓦面高压集中区域,提高轴承使用寿命。
Based on fluid-structure two-way coupling theory,the effects to the bearing lubricating properties caused by tile-surface position parameters and materials were studied by using CFD technology to make numerical simulations of a storage unit thrust bearing.The results show that film pressure and load are increased with the increasing of tile-surface inclination,and the position of central pressure deflects along the outward rotation direction of the mirror plate and the radial direction of tile-surface.The pressure and load are both increased with the decreasing of oil clearance.The pressure gradient of the bearing pad is reduced with the decreasing of elastic modulus of the pad,and the position of maximum pressure is shifted to the side edge of the pad,indicating the concentration of the high-pressure region can be effectively reduced and the bearing life can be improved by appropriately reducing the elastic modulus of the pad.
Based on fluid-structure two-way coupling theory,the effects to the bearing lubricating properties caused by tile-surface position parameters and materials were studied by using CFD technology to make numerical simulations of a storage unit thrust bearing.The results show that film pressure and load are increased with the increasing of tile-surface inclination,and the position of central pressure deflects along the outward rotation direction of the mirror plate and the radial direction of tile-surface.The pressure and load are both increased with the decreasing of oil clearance.The pressure gradient of the bearing pad is reduced with the decreasing of elastic modulus of the pad,and the position of maximum pressure is shifted to the side edge of the pad,indicating the concentration of the high-pressure region can be effectively reduced and the bearing life can be improved by appropriately reducing the elastic modulus of the pad.
引文
[1]梅祖彦.抽水蓄能发电技术[M].北京:机械工业出版社,2000.
[2]曹明良.抽水蓄能电站在我国电力工业发展中的重要作用[J].水电能源科学,2009,27(2):212-214.Cao Mingliang.Important role of pumped storage power station in power system development of China[J].Water Resources and Power,2009,27(2):212-214.
[3]孟令元.立式水轮机分块瓦导轴承润滑机构的试验研究[J].大机电技术,1982(2):46-52.Meng Lingyuan.Experimental study on vertical-turbine block pad guide bearing lubrication mechanism[J].Large Electric Machine and Hydraulic Turbine,1982(2):46-52.
[4]谢小成,黄昆.分块瓦式导轴承在水电机组上的应用[J].东方电机,1998(4):5-12.Xie Xiaocheng,Huang Kun.The application of block tile type guide bearing in hydro turbine[J].Dongfang Electrical Machine,1998(4):5-12.
[5]王凤才,李忠.瓦块弹性对大型水轮发电机组径向可倾瓦轴承润滑性能的影响[J].摩擦学学报,1999,19(3):255-260.Wang Fengcai,Li Zhong.The effects of pad deformations on large tilting-pad journal bearing for tubular turbine-generator set[J].Tribology,1999,19(3):255-260.
[6]史冬岩,张成,任龙龙,等.滑动轴承压力分布及动特性系数[J].哈尔滨工程大学学报,2011,32(9):1134-1139.Shi Dongyan,Zhang Cheng,Ren Longlong,et al.Research on the oil film pressure and dynamic coefficient of a sliding bearing[J].Journal of Harbin Engineering University,2011,32(9):1134-1139.
[7]何春勇,刘正林,吴铸新,等.船用水润滑推力轴承扇形推力瓦润滑性能数值分析[J].润滑与密封,2009,34(6):39-42.He Chunyong,Liu Zhenglin,Wu Zhuxin,et al.Numerical analysis of lubricating properties of sector thrust pad of ship water-lubricated thrust bearing[J].Lubricating Engineering,2009,34(6):39-42.
[8]于晓东,陆怀民,郭秀荣,等.高速圆形可倾瓦推力轴承的润滑性能[J].农业机械学报,2007,38(2):204-207.
[9]于晓东,陆怀民,郭秀荣,等.扇形推力轴瓦润滑性能的数值分析[J].润滑与密封,2007,32(1):123-125.Yu Xiaodong,Lu Huaiming,Guo Xiurong,et al.Numerical analysis of lubricating characteristics of sector thrust bearing pad[J].Lubricating Engineering,2007,32(1):123-125.
[10]Guo Z,Hirano T,Kirk R G.Application of CFD analysis for rotating machinery.Part I:Hydrodynamic,hydrostatic bearings and squeeze film damper[J].Journal of Engineering for Gas Turbines and Power,2005,127(2):445-451.
[11]高庆水,杨建刚.基于CFD方法的液体动压滑动轴承特性研究[J].润滑与密封,2008,33(9):65-67.Gao Qingshui,Yang Jiangang.Research on the dynamic characteristics of hydro-dynamical journal bearing based on CFD analysis[J].Lubrication Engineering,2008,33(9):65-67.
[12]Gertzos K P,Nikolakopoulos P G,Papadopoulos C A.CFD analysis of journal bearing hydrodynamic lubrication by Bingham lubricant[J].Tribology International,2008,41(12):1190-1204.
[13]孟凡明,陈原培,杨涛.CFX和Fluent在径向滑动轴承润滑计算中的异同探讨[J].重庆大学学报,2013,36(1):7-14.Meng Fanming,Chen Yuanpei,Yang Tao.Discussion on similarities and differences between CFX and Fluent software in calculating journal bearing lubrication[J].Journal of Chongqing University,2013,36(1):7-14.
[14]徐秉业,王建学.弹性力学[M].北京:清华大学出版社,2007.
[15]王福军.计算流体动力学[M].北京:清华大学出版社,2011.
[16]宋学官,蔡林,张华.ANSYS流固耦合分析与工程实例[M].北京:中国水利水电出版社,2012.
[2]曹明良.抽水蓄能电站在我国电力工业发展中的重要作用[J].水电能源科学,2009,27(2):212-214.Cao Mingliang.Important role of pumped storage power station in power system development of China[J].Water Resources and Power,2009,27(2):212-214.
[3]孟令元.立式水轮机分块瓦导轴承润滑机构的试验研究[J].大机电技术,1982(2):46-52.Meng Lingyuan.Experimental study on vertical-turbine block pad guide bearing lubrication mechanism[J].Large Electric Machine and Hydraulic Turbine,1982(2):46-52.
[4]谢小成,黄昆.分块瓦式导轴承在水电机组上的应用[J].东方电机,1998(4):5-12.Xie Xiaocheng,Huang Kun.The application of block tile type guide bearing in hydro turbine[J].Dongfang Electrical Machine,1998(4):5-12.
[5]王凤才,李忠.瓦块弹性对大型水轮发电机组径向可倾瓦轴承润滑性能的影响[J].摩擦学学报,1999,19(3):255-260.Wang Fengcai,Li Zhong.The effects of pad deformations on large tilting-pad journal bearing for tubular turbine-generator set[J].Tribology,1999,19(3):255-260.
[6]史冬岩,张成,任龙龙,等.滑动轴承压力分布及动特性系数[J].哈尔滨工程大学学报,2011,32(9):1134-1139.Shi Dongyan,Zhang Cheng,Ren Longlong,et al.Research on the oil film pressure and dynamic coefficient of a sliding bearing[J].Journal of Harbin Engineering University,2011,32(9):1134-1139.
[7]何春勇,刘正林,吴铸新,等.船用水润滑推力轴承扇形推力瓦润滑性能数值分析[J].润滑与密封,2009,34(6):39-42.He Chunyong,Liu Zhenglin,Wu Zhuxin,et al.Numerical analysis of lubricating properties of sector thrust pad of ship water-lubricated thrust bearing[J].Lubricating Engineering,2009,34(6):39-42.
[8]于晓东,陆怀民,郭秀荣,等.高速圆形可倾瓦推力轴承的润滑性能[J].农业机械学报,2007,38(2):204-207.
[9]于晓东,陆怀民,郭秀荣,等.扇形推力轴瓦润滑性能的数值分析[J].润滑与密封,2007,32(1):123-125.Yu Xiaodong,Lu Huaiming,Guo Xiurong,et al.Numerical analysis of lubricating characteristics of sector thrust bearing pad[J].Lubricating Engineering,2007,32(1):123-125.
[10]Guo Z,Hirano T,Kirk R G.Application of CFD analysis for rotating machinery.Part I:Hydrodynamic,hydrostatic bearings and squeeze film damper[J].Journal of Engineering for Gas Turbines and Power,2005,127(2):445-451.
[11]高庆水,杨建刚.基于CFD方法的液体动压滑动轴承特性研究[J].润滑与密封,2008,33(9):65-67.Gao Qingshui,Yang Jiangang.Research on the dynamic characteristics of hydro-dynamical journal bearing based on CFD analysis[J].Lubrication Engineering,2008,33(9):65-67.
[12]Gertzos K P,Nikolakopoulos P G,Papadopoulos C A.CFD analysis of journal bearing hydrodynamic lubrication by Bingham lubricant[J].Tribology International,2008,41(12):1190-1204.
[13]孟凡明,陈原培,杨涛.CFX和Fluent在径向滑动轴承润滑计算中的异同探讨[J].重庆大学学报,2013,36(1):7-14.Meng Fanming,Chen Yuanpei,Yang Tao.Discussion on similarities and differences between CFX and Fluent software in calculating journal bearing lubrication[J].Journal of Chongqing University,2013,36(1):7-14.
[14]徐秉业,王建学.弹性力学[M].北京:清华大学出版社,2007.
[15]王福军.计算流体动力学[M].北京:清华大学出版社,2011.
[16]宋学官,蔡林,张华.ANSYS流固耦合分析与工程实例[M].北京:中国水利水电出版社,2012.