RELIABILITY DESIGN OF A CRANK SHAFT SUBJECTED TO REPETITIVE LOADS
Based on the field data from units sold in the market and laboratory data from a tailored set of accelerated life tests, a crank shaft from a compressor used in side-by-side refrigerators was redesigned to improve reliability. Using standard mass and energy conservation balances, a variety of loads were estimated and analyzed for the refrigerator cycles. Experimental data indicated that the failure modes and mechanisms for the failures were locking of the compressor due to crank shaft wear. These modes were similar to those found in the failures in the field samples. Failure analysis, accelerated life tests, and corrective actions were used to identify the sources of the failures. Redesigns of the compressor shaft included redesigns of hole position and grooves of the crank shaft for oil lubrication, hardening the crank shaft, and eliminating interference of the thrust washer. The estimated life, B1, of the new design is now guaranteed to be over 10 years with the annual failure rate of 0.01 percent.
reliability design load analysis parameter design accelerated life testing
Seong-woo Woo Sangkyoung Oh Chulho Kim Youngchan Kim Dennis L.ONeal
SAMSUNG Electronics Co., LTD., 272, Oseon-Dong, Gwangsan-Gu Gwangju-City, 506-723, Korea Department of Mechanical Engineering, Korea University, Anam-dong, Sungbuk-Gu, Seoul, Korea Holdredge/Paul Professor and Head of the Department of Mechanical Engineering, Texas A&M University,
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）