基于热油携带的静压支承油膜温度场及试验
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摘要
为了更加准确地阐明静压支承油膜发热机理,提出了一种考虑热油携带的油膜温升计算方法。定义了油膜热油携带因子并推导出表达式,从理论上对不同工况条件扇环腔油垫是否发生热油携带进行了判定。建立了热油携带影响下供油温升方程,采用有限体积法进行油膜温度场模拟,得到不同工况条件下考虑热油携带的油膜温升曲线,并与试验结果进行对比分析,吻合较好。结果表明:针对本结构静压支承,当转速小于10 r/min时,任何载荷工况下均无热油携带发生;当转速大于60 r/min时,在整个载荷范围(0～32 t)内均有热油携带现象发生。当发生热油携带时,油膜温升加剧,且转速对温升的影响比载荷对温升的影响更明显。
For clarifying the heat generation mechanism of hydrostatic bearing oil film accurately,a calculation method of the oil film temperature is proposed,which considered the influence of hot-oilcarrying(HOC). The factor of HOC was defined and deduced,and the occurring conditions was determined theoretically when the phenomenon of HOC appears. The temperature rise equation of lube feeding under the influence was established. The finite volume method was used to simulate the temperature field of the film. The temperature rise curves of oil film under different working conditions was obtained,which were in good agreement with the experimental results. The results show that,for this structure bearings,the phenomenon doesn't appear under any load condition when the rotating speed is less than 10 r/min. When the rotating speed is greater than 60 r/min,the phenomenon occurs in the entire load range,from 0 t to 32 t. The temperature rise of the film is aggravated,while the phonmenon of HOC occurs,and the rotation speed affects the temperature rise more than the load does.
For clarifying the heat generation mechanism of hydrostatic bearing oil film accurately,a calculation method of the oil film temperature is proposed,which considered the influence of hot-oilcarrying(HOC). The factor of HOC was defined and deduced,and the occurring conditions was determined theoretically when the phenomenon of HOC appears. The temperature rise equation of lube feeding under the influence was established. The finite volume method was used to simulate the temperature field of the film. The temperature rise curves of oil film under different working conditions was obtained,which were in good agreement with the experimental results. The results show that,for this structure bearings,the phenomenon doesn't appear under any load condition when the rotating speed is less than 10 r/min. When the rotating speed is greater than 60 r/min,the phenomenon occurs in the entire load range,from 0 t to 32 t. The temperature rise of the film is aggravated,while the phonmenon of HOC occurs,and the rotation speed affects the temperature rise more than the load does.
引文
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[16]李海宁,张晓青,李奎,等.动磁直线压缩机气体轴承特性的CFD模拟[J].工程热物理学报,2013,34(6):1026-1030.Li Hai-ning,Zhang Xiao-qing,Li Kui,et al.CFDsimulation of gas bearing characteristic for a movingmagnet linear compressor[J].Journal of Engineering Hermophysics,2013,34(6):1026-1030.
[17]Yadav S K,Sharma S C.Performance of hydrostatic tilted thrust pad bearings of various recess shapes operating with non-Newtonian lubricant[J].Finite Elements in Analysis and Design,2014,87:43-55.
[2]陈玲,黄智,衡凤琴,等.大型车铣磨复合机床静压转台油膜热特性分析及其优化研究[J].机床与液压,2016,44(19):109-114.Chen Ling,Huang Zhi,Heng Feng-qin,et al.Thermal characteristics analysis and optimization study of hydrostatic rotary table oil film for large lathe milling and grinder compound machine tool[J].Machine Tool&Hydraulics,2016,44(19):109-114.
[3]Nelias D,Antaluca E,Boucly V.Rolling of an elastic ellipsoid upon an elastic-plastic flat[J].Journal of Tribology,2007,129(4):791-800.
[4]Kim S,Cho J W.Thermal characteristic analysis of a high-precision centerless grinding machine for machining ferrules[J].International Journal of Precision Engineering and Manufacturing,2007,8(1):32-39.
[5]Johansen P,Roemer D B,Pedersen H C,et al.Analytical thermal field theory applicable to oil hydraulic fluid film lubrication[C]∥Proceedings of the ASME/BATH Symposium on Fluid Power and Motion Control,Bath,England,2014:1-8.
[6]彭育志,明越,肖金生,等.活性炭/沸石层状床氢气纯化穿透曲线热效应[J].工程热物理学报,2016,37(7):1511-1518.Peng Yu-zhi,Ming Yue,Xiao Jin-sheng,et al.Thermal effects on hydrogen purification breakthrough curves of activated carbon/zeolite layered bed[J].Journal of Engineering Thermophysics,2016,37(7):1511-1518.
[7]孟曙光,熊万里,王少力,等.小孔节流深浅腔动静压轴承承载特性解析研究[J].机械工程学报,2015,51(22):191-201.Meng Shu-guang,Xiong Wan-li,Wang Shao-li,et al.Analytical research on characteristics of deep-shallow journal bearings with orifice restrictors[J].Journal of Mechanical Engineering,2015,51(22):191-201.
[8]于晓东,耿磊,郑小军,等.恒流环形腔多油垫静压推力轴承油膜刚度特性[J].哈尔滨工程大学学报,2017,38(12):1-6.Yu Xiao-dong,Geng Lei,Deng Xiao-jun,et al.Oil film stiffness characteristics of constant fluid hydrostatic thrust bearing with annular cavity multi-pads[J].Journal of Harbin Engineering University,2017,38(12):1-6.
[9]于晓东,高春丽,邱志新,等.高速重载静压推力轴承润滑性能研究[J].中国机械工程,2013,24(23):3230-3234.Yu Xiao-dong,Gao Chun-li,Qiu Zhi-xin,et al.Research on lubrication performance of high-speed heavy-duty hydrostatic thrust bearings[J].China Mechanical Engineering,2013,24(23):3230-3234.
[10]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.Yu Xiao-dong,Sun Dan-dan,Wu Xiao-gang,et al.High speed and heavy load characteristic on oil film thickness of annular recess multi-pad hydrostatic thrust bearing[J].Journal of Propulsion Technology,2016,37(7):1350-1355.
[11]谢方伟,侯友夫,张立强,等.液粘传动变形界面间油膜温度场实验研究[J].中南大学学报,2015,34(11):1733-1737.Xie Fang-wei,Hou You-fu,Zhang Li-qiang,et al.Experimental research on oil film temperature field of hydro-viscous drive between deformed interfaces[J].Journal of Central South University,2015,34(11):1733-1737.
[12]Zhang Yan-qin,Fan Li-guo,Yu Xiao-dong,et al.Simulation and experimental analysis on supporting characteristics of multiple oil pad hydrostatic bearing disk[J].Journal of Hydrodynamics,2013,25(2):236-241.
[13]Zhang Yan-qin,Fan Li-guo,Chen Yao.Simulation and experimental study of lubrication characteristics of vertical hydrostatic guide rail[J].High Technology Letters,2014,20(3):315-320.
[14]Zhang Yan-qin,Fan Li-guo.Simulation and experimental analysis of influence of inlet flow on heavy hydrostatic bearing temperature field[J].Asian Journal of Chemistry,2014,26(17):5478-5482.
[15]张艳芹.重型静压推力轴承综合物理场研究[D].哈尔滨:哈尔滨理工大学机械动力工程学院,2009.Zhang Yan-qin.Integrated physical field research of heavy hydrostatic thrust bearing[D].Harbin:School of Mechanical and Power Engineering,Harbin University of Science and Technology,2009.
[16]李海宁,张晓青,李奎,等.动磁直线压缩机气体轴承特性的CFD模拟[J].工程热物理学报,2013,34(6):1026-1030.Li Hai-ning,Zhang Xiao-qing,Li Kui,et al.CFDsimulation of gas bearing characteristic for a movingmagnet linear compressor[J].Journal of Engineering Hermophysics,2013,34(6):1026-1030.
[17]Yadav S K,Sharma S C.Performance of hydrostatic tilted thrust pad bearings of various recess shapes operating with non-Newtonian lubricant[J].Finite Elements in Analysis and Design,2014,87:43-55.