Research of CFD Application to Simplify the Design of Sleeve Bearing

• Main Authors: Chu-Hsien Chou, 周初憲
• Other Authors: Chang-Huei Wu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/89627936277462471335

碩士 === 元智大學 === 機械工程學系 === 96 === The air moving device used in personal computer required reliable bearing system. There are ball bearing and sleeve bearing in the market now. Sleeve bearing had the advantage in low cost and high resistance to shock and vibration, but the life expectancy is not well studied yet in the industry. That resulted in long time expended in design and life validation. This paper is to use CFD software to simulate sleeve operating in gravity field in horizontal and vertical positions. Based on this study to come out a completely design process including simulation model and key factors definition. The results showed the key factors are clearance and permeability. In this paper had applied this design tool to small axial fan and blower to optimize the design and had good result by experiments. Compared to original design, this new bearing can extend the life 60% in axial fans and 180% in blowers and decrease the design cycle from 12 months to within 6 months.