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CFD based investigation on influence of orifice chamber shapes for the design of aerostatic thrust bearings at ultra-high speed spindles
Affiliation:1. School of Mechatronics Engineering, Harbin Institute of Technology, P.O. Box 413, Harbin 150001, PR China;2. College of Engineering, Design and Physical Sciences, Brunel University, Uxbridge, Middlesex UB8 3PH, UK;1. Beijing Key Laboratory of Advanced Manufacturing Technology, Beijing University of Technology, Beijing 100124, PR China;2. Chengdu Fine Optic Engineering Research Center, Chengdu 610041, PR China;1. Shenzhen Key Lab of Digital Manufacturing Technology, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China;2. State Key Laboratory in Ultra-precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;1. School of Mechatronics Engineering, Harbin Institute of Technology, P.O. Box 413, Harbin 150001, PR China;2. College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge, Middlesex UB8 3PH, UK;1. Institute of Machinery Manufacturing Technology, China Academy of Engineering Physics, Mianyang, 621000 People''s Republic of China;2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240 People''s Republic of China;1. Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, China;2. Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621900, China
Abstract:The influences of six orifice chamber configurations on performance characteristics of aerostatic thrust bearings under various operating conditions are thoroughly studied using the computational fluid dynamics approach. Experiments are carried out to further verify the simulations. The obtained results show that there are many differences in performance behaviors of the aerostatic thrust bearing caused by different orifice chamber shapes. Further analysis represents that the pressure depression, gas vortices, and the turbulent intensity which are all weakened with decreasing air film thickness. The load capacity of the aerostatic thrust bearing slightly decreases with increasing rotational speeds of the spindle.
Keywords:Aerostatic thrust bearing  Orifice chamber shape  CFD simulations  Aerostatic bearing performance
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