工业平缝机旋梭轴不同倾斜状态下气浮轴承动态特性分析  

Different Inclined State Air Bearing Dynamic Analysis of Industrial Sewing Machine Bobbin Axis

作　　者：吴昱桦 李军宁[2] 卢志伟[2] 刘波[2] 

机构地区：[1]白银矿冶职业技术学院机电工程系 [2]西安工业大学机电工程学院

出　　处：《组合机床与自动化加工技术》2017年第11期32-35,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然基金项目(51505361);西安市科技局科技计划专项资金项目(CXY1301)

摘　　要：工业平缝机旋梭轴在实际生产过程中会受到诸多复杂力作用而发生倾斜。为研究旋梭轴倾斜状态对轴承气浮特性的影响规律,文章建立旋梭轴倾斜下的物理模型,分别对前后轴承气膜高度进行曲面拟合,并利用Matlab有限差分法计算气膜压力分布,分析旋梭轴绕不同倾斜中心倾斜时,转速在4000~8000rpm下,前后气浮轴承动态性能的变化。结果表明:旋梭轴在倾斜条件下,最大承载力倾斜中心在靠近前轴承后端三分之一处附近;随着旋梭轴转速增大,气浮动压效应越明显,引起承载力增大,耗气量也增大;前后轴承气膜差异明显,旋梭轴高速运动下前轴承的气体稳定性比后轴承好,后轴承比前轴承具有更好的动压效应。Industrial sewing machine bobbin axis in the actual production process will be subject to many complex forces and tilting. To study the impact of the hook axis tilt state law bearing flotation characteristics of the physical model under the hook axis tilt of the front and rear air bearing surface fitting membrane height, respectively, and calculate the air film pressure distribution use Matlab finite difference method, analysis bobbin center shaft about different tilt tilt speed at 4000 - 8000rpm, the change before and after the air bearing dynamic performance. The results showed that： the hook shaft in an inclined condition, the maximum carrying capacity tilt center near the front near the rear third of the beating; with the hook shaft speed increases, the more obvious the effect of gas floating pressure, causing increased carrying capacity gas con- sumption also increased; significant difference before and after bearing gas film, gas stability under high speed motion before the hook shaft beating is better than rear bearings, rear bearing has a better effect than in the previous hydrodynamic bearings.

关 键 词：旋梭轴倾斜 倾斜中心 动压效应 

分 类 号：TH133.3[机械工程—机械制造及自动化] TG113.25[金属学及工艺—物理冶金]