摘要
为了提升多孔质气体静压止推轴承的刚度及精度稳定性,对作用面面型为平面、微米凹面的多孔质气体静压轴承作对比研究。用Gambit和Fluent软件进行建模和仿真分析,并以平面、1.5和3μm两种凹槽深度为参数,研究凹槽深度对多孔质气体静压止推轴承承载力及刚度特性影响。仿真及试验结果对比分析表明:气膜厚度1~20μm,承载力及静态刚度随凹槽深度变大而增强;精密车削与研磨加工工艺对微米级凹槽刚度及稳定性影响较大,凹槽形状误差易引起气锤现象。
In order to improve the stiffness and accuracy stability of the porous aerostatic thrust bearing,the porous aerostatic bearings with different surfaces such as plane and micro concave surfaces were compared and analyzed,which were modeled and simulated by Gambit and Fluent software.The effects of groove depth on bearing capacity and stiffness characteristics of the porous aerostatic thrust bearing were studied taking the plane,1.5μm and 3μm groove depths as parameters.A comparative analysis of the simulation and test results shows that the gas film thickness of the aerostatic bearings is 1~20μm,the bearing capacity and static stiffness are enhanced with the groove depth becoming larger.The precision turning and grinding process have great influence on the stiffness and stability of the micron groove,and the groove shape error is easy to cause the air hammer phenomenon.
作者
任东旭
李彬
席建普
赵惠英
REN Dongxu;LI Bin;XI Jianpu;ZHAO Huiying(School of Mechatronics Engineering,Zhongyuan University of Technology,Zhengzhou Henan 450007,China;School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an Shaanxi 710049,China)
出处
《机床与液压》
北大核心
2020年第14期33-36,共4页
Machine Tool & Hydraulics
基金
河南省高等学校现代制造装备与仪器重点学科开放实验室(2016MEI005)
中原工学院青年人才创新能力基金项目(K2018QN002)。
关键词
气体静压轴承
多孔质
微米凹面
气锤现象
Aerostatic bearing
Porous
Micro-concave surface
Air hammer phenomenon
