新型水润滑动静压高速主轴轴承的流场模拟  

Simulation on the Flow Fields of a Novel Water-lubricated Static and Dynamic Hybrid Bearing for High-speed Spindle

作　　者：王芳芳[1] 陈渭[1] 张友峰[1] 

机构地区：[1]西安交通大学润滑理论及轴承研究所,陕西西安710049

出　　处：《润滑与密封》2010年第12期28-31,共4页Lubrication Engineering

基　　金：国家973项目(2009CB724404)

摘　　要：轴承过热会造成高速高刚度主轴抱轴,导致主轴失效。如何提高小间隙轴承内的泄油量来降低轴承温升,是高速高刚度主轴轴承设计必须考虑的重要因素。提出一种新型的可应用于高速机床主轴的高速水润滑多孔阶梯轴承,应用FLUENT软件对其流场进行模拟分析。根据轴承的对称性,选用1/8轴承建立流场分析模型。分析结果表明,可以在同一个深腔内开设有进出油孔的结构,从进油孔节流后流入深腔的润滑油不会无效泄漏,可达到降低轴承温升的目的;深腔内的润滑油为紊流,而浅腔中润滑油紊流现象逐渐减弱;进油孔的节流形式为孔式环面节流。The shaft of high speed and high stiffness spindle could be stuck due to overheat generated by bearing and poor lubrication,and then the failure of spindle occurs.It should be seriously considered as a key factor for the bearing design of high-speed and high-stiffness spindle that how to increase the flow rate within the bearing with small clearance to reduce the temperature rising of bearing.A novel multi-holes deep and shallow recesses water lubricated hybrid bearing which can be used for high-speed machine tool spindle was proposed,the FLUENT software was used to simulate the flow field in bearing.To save computer time,a one-eighth bearing model was built for flow analysis according to the bearing symmetry.The results shows that,inlet hole and outlet hole could be machined in the same deep groove,lubricant flowed into deep groove through the orifice restrictor could work appropriate for high speed bearing lubrication,but not directly flow out through outlet in the same groove,so the temperature of bearing could be reduced effectively.The remarkable turbulence flow occurs for lubricant in deep groove,and turbulence flow is gradually weakened for lubricant in the shallow recesses.The discharge model of the inlet hole is orifice restrictor.

关 键 词：润滑 摩擦 FLUENT软件 高速轴承 

分 类 号：TH133.31[机械工程—机械制造及自动化]