空气静压径向轴承动压效应对其承载能力的影响
|
摘要
建立空气静压径向轴承的理论模型,利用有限体积法分析软件,仿真分析了轴承处于旋转状态时,平均间隙和供气压力对轴承承载力和耗气量等特性参数的影响。结果表明:随着轴承转速的增加,空气静压径向轴承产生明显的动压效应;轴承的平均间隙越小,动压效应对轴承承载力的提高作用越明显;供气压力越大,纯静压润滑在动静压混合润滑中所占的比例越大,动压效应所占的比例越小。
The theoretical model is established for an aerostatic radial bearing.The effects of bearing clearance and supply pressure on the bearing′s load capacity and air consumption are analyzed under the condition of rotating by using the finite element software.The results show the obvious dynamic pressure effect is generated with the increase of the rotating speed.The less the bearing clearance,the more the obvious enhancing effect of dynamic pressure effect on the bearing′s load capacity.The larger the supply pressure,the greater the proportion of pure hydrostatic lubrication in hydrostatic-dynamic hybrid air lubrication,and the smaller the proportion of dynamic pressure effect.
The theoretical model is established for an aerostatic radial bearing.The effects of bearing clearance and supply pressure on the bearing′s load capacity and air consumption are analyzed under the condition of rotating by using the finite element software.The results show the obvious dynamic pressure effect is generated with the increase of the rotating speed.The less the bearing clearance,the more the obvious enhancing effect of dynamic pressure effect on the bearing′s load capacity.The larger the supply pressure,the greater the proportion of pure hydrostatic lubrication in hydrostatic-dynamic hybrid air lubrication,and the smaller the proportion of dynamic pressure effect.
引文
[1]刘暾,刘育华,陈世杰.静压气体润滑[M].哈尔滨:哈尔滨工业大学出版社,1980.
[2]陈雪梅,黎文兰.气体轴承技术及其应用[J].润滑与密封,2000(4):61-63.
[3]边新孝,李谋渭.静压空气轴承偏载时的承载分析[J].航空精密制造技术,2005,41(1):17-19.
[4]乔江东.基于数值模拟的精密摆角铣头气体静压轴承的研究[D].哈尔滨:哈尔滨工业大学,2006.
[5]侯予,王瑾,陈纯正.径向小孔静压气体轴承的试验研究[J].润滑与密封,2002(2):15-17.
[6]于贺春,马文琦,王祖温,等.基于FLUENT的径向静压气体轴承的静态特性研究[J].润滑与密封,2009,34(12):77-81.
[7]郑书飞.精密空气电主轴气体轴承动态特性参数分析[D].南京:东南大学,2010.
[8]龙威,李军,包钢.FLUENT软件在空气轴承研究领域的应用[J].机床与液压,2006(6):151-153.
[9]李进良,李承曦,胡仁喜.精通FLUENT6.3流场分析[M].北京:化学工业出版社,2009.
[2]陈雪梅,黎文兰.气体轴承技术及其应用[J].润滑与密封,2000(4):61-63.
[3]边新孝,李谋渭.静压空气轴承偏载时的承载分析[J].航空精密制造技术,2005,41(1):17-19.
[4]乔江东.基于数值模拟的精密摆角铣头气体静压轴承的研究[D].哈尔滨:哈尔滨工业大学,2006.
[5]侯予,王瑾,陈纯正.径向小孔静压气体轴承的试验研究[J].润滑与密封,2002(2):15-17.
[6]于贺春,马文琦,王祖温,等.基于FLUENT的径向静压气体轴承的静态特性研究[J].润滑与密封,2009,34(12):77-81.
[7]郑书飞.精密空气电主轴气体轴承动态特性参数分析[D].南京:东南大学,2010.
[8]龙威,李军,包钢.FLUENT软件在空气轴承研究领域的应用[J].机床与液压,2006(6):151-153.
[9]李进良,李承曦,胡仁喜.精通FLUENT6.3流场分析[M].北京:化学工业出版社,2009.