双矩形腔静压推力轴承内部流场动态分析
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摘要
以Q1-205型双矩形腔静压推力轴承为研究对象,采用理论分析、动态仿真和实验测试相结合的研究方法,针对6种入口流速和3种工作转速工况油膜厚度变化对静压轴承的速度场、涡度及压力场进行了分析。采用动网格技术得出不同工况参数下膜厚与封油边流量、涡度、油膜压力关系曲线,揭示了油膜性能动态变化规律。研究发现,油腔内的低速区和高涡度区集中分布于逆流侧封油边处,且油膜厚度越小集中现象越显著,随着入口流速增大,油腔压力升高,低膜厚下高速时由于压力损失严重使得腔内压力随工作转速的增加而有所减少。
Taking the Q1-205 type double-rectangular cavity hydrostatic thrust bearing as study object,the method combining theoretical analysis,dynamic simulation and experimental testing is used,aiming at the variation of oil film thickness under six inlet velocity and three working speed conditions,the velocity field,vorticity and pressure field are analyzed. Though the dynamic mesh technique,the relationship curves between the film thickness and the flow rate,vorticity and pressure of the film under different operating conditions are obtained. Which revealed the dynamic change rule of film performance. The results show that the low speed regions and high vorticity regions in the oil cavity are located at the edge seal of the countercurrent side,and the phenomenon increases with the decrease of film thickness. In the wake of the inlet velocity and pressure of oil cavity raise the pressure in the cavity reduces with the increase of working speed due to the serious pressure loss.
Taking the Q1-205 type double-rectangular cavity hydrostatic thrust bearing as study object,the method combining theoretical analysis,dynamic simulation and experimental testing is used,aiming at the variation of oil film thickness under six inlet velocity and three working speed conditions,the velocity field,vorticity and pressure field are analyzed. Though the dynamic mesh technique,the relationship curves between the film thickness and the flow rate,vorticity and pressure of the film under different operating conditions are obtained. Which revealed the dynamic change rule of film performance. The results show that the low speed regions and high vorticity regions in the oil cavity are located at the edge seal of the countercurrent side,and the phenomenon increases with the decrease of film thickness. In the wake of the inlet velocity and pressure of oil cavity raise the pressure in the cavity reduces with the increase of working speed due to the serious pressure loss.
引文
[1]邵俊鹏,张艳芹,李鹏程.基于FLUENT的静压轴承椭圆腔和扇形腔静止状态流场仿真[J].润滑与密封,2007,32(1):93-95.
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[12] PAJA C P. SCHUBERT A,WASILCZUK M,et al. Simulation of large thrust-bearing performance at transient states,warm and cold start-up[J]. Journal of Engineering Tribology,2014,228(1):96-103.
[13]熊万里,侯志泉,吕浪,等.基于动网格模型的液体动静压轴承刚度阻尼计算方法[J].机械工程学报,2012,48(23):118-126.
[14]王少力,熊万里,桂林,等.偏载液体静压转台旋转工况下承载力及倾覆力矩动网格计算方法[J].机械工程学报,2014,50(23):66-74.
[15]孙丹,王双,王克明,等.椭圆轴承与圆轴承动力特性CFD数值分析[J].噪声与振动控制,2015,35(4):1-5.
[2]邵俊鹏,张艳芹,韩桂华,等.重型静压轴承油腔结构优化与流场仿真[J].系统仿真学报,2010,22(5):1093-1096.
[3]刘赵淼,张成印.不同边界条件下液体静压油腔流场与承载稳定性数值研究[J].科技导报,2011,29(19):40-46.
[4]王艳真,蒋丹,尹忠慰,等.基于CFD的水润滑静压推力轴承承载能力分析[J].东华大学学报(自然科学版),2015,41(4):428-432.
[5]崔海龙,岳晓斌,张连新,等.基于数值模拟的小孔节流空气静压轴承静动态特性研究[J].机械工程学报,2016,52(9):116-121.
[6]王禹,王连吉,王续跃.液体静压推力轴承设计与FLUENT仿真分析[J].机械设计与制造,2017(9):220-224.
[7] ZHANG Yanqin,FAN Liguo,LI Rui. Simulation and experimental analysis of supporting characteristics of multiple oil pad hydrostatic bearing disk[J]. Journal of Hydrodynamics, 2013, 25(2):236-241.
[8]于晓东,孙丹丹,吴晓刚,等.环形腔多油垫静压推力轴承膜厚高速重载特性[J].推进技术,2016,37(7):1350-1355.
[9] SHARMA S C,JAIN S,BHARUKA D. Influence of recess shape on the performance of a capillary compensated circular thrust pad hydrostatic bearing[J]. Tribology International,2002,35(6):347-356.
[10] RAJASEKHAR N E,SHARMA S C. Orifice compensatedmultirecess hydrostatic/hybrid journal bearing system of various geometric shapes of recess operating with micropolar lubricant[J]. Tribology International,2011,44(3):284-296.
[11]舒敏骅,陈科,尤云祥,等.动网格方法在螺旋桨非定常轴承力数值计算中的应用[J].中国舰船研究,2016,11(3):25-31.
[12] PAJA C P. SCHUBERT A,WASILCZUK M,et al. Simulation of large thrust-bearing performance at transient states,warm and cold start-up[J]. Journal of Engineering Tribology,2014,228(1):96-103.
[13]熊万里,侯志泉,吕浪,等.基于动网格模型的液体动静压轴承刚度阻尼计算方法[J].机械工程学报,2012,48(23):118-126.
[14]王少力,熊万里,桂林,等.偏载液体静压转台旋转工况下承载力及倾覆力矩动网格计算方法[J].机械工程学报,2014,50(23):66-74.
[15]孙丹,王双,王克明,等.椭圆轴承与圆轴承动力特性CFD数值分析[J].噪声与振动控制,2015,35(4):1-5.