11. Reliability by Design, Reliability Through Manufacturing—Mark Tussing.pdfVIP

Reliability by Design Reliability Through Manufacturing 发动机可靠性设计及生产 China Engine Reliability Conference Southwest Research Institute® San Antonio, Texas Engine Life Regimes 发动机寿命规律 Failure Rate 故障率 Infant Random failure Wear-out mortality 随机故障 磨损 新品故障 Engine Age (Hours) 发动机寿命（小时） 2 Engine Life Regimes 发动机寿命规律 • The infant mortality rate is controlled by manufacturing 生产制造环节影响新品故障率 – Material quality problems 材料质量问题 – Failure to maintain specifications 不符合产品设计规格 – Assembly errors 装配问题 • Wear-out is controlled by design and maintenance 耐久性失效受设计和维护因素的影响 – Selection of materials 材料的选择 – Tolerances and specifications 公差和规格 – Filtration effectiveness 筛选有效性 – Oil change intervals, oil quality, other maintenance 机油更换间隔、机油质量和其他维护 3 Design for a Duty Cycle 设计环节运行工况因素 • Duty cycle has a huge impact on reliability and Durability 运行工况对可靠性和耐久性影响很大 – It is important to consider duty cycle during the design process 在设计过程中考虑运行工况是非常重要的 – Duty cycles vary widely between different markets and applications 不同市场和应用的运行工况差别很大 • Design for the most severe duty cycle you expect to encounter 在设计中要考虑可能面对的最恶劣的工作环境 4 Duty Cycle Example: Hi-HP Engines 运行工况示例：重型发动机 Initial Cost Total Life Cycle Cost G 初始成本 Crew 总寿命周期成本 P 机 y 电 Boat b d 发 轮船 Barge Prime Gas n 用 a