2关键构件是高端机械装备的核心2.1关键构件及其“三大问题”关键构件是指决定机械装备主要功能,体现机械装备寿命与可靠性,失效酿成灾难性后果,主要失效部件是疲劳的主承力构件。关键构件有三大类:①转动构件,如叶片、轮盘、轴;②传动构件,如齿轮、轴承;③主 2 key components are the core of high-end machinery and equipment 2.1 The key components and their “three major issues” The key components is to determine the main functions of mechanical equipment, machinery and equipment to reflect the life and reliability, failure lead to disastrous consequences, the main failure components are The main component of fatigue. There are three main types of key components: ① rotating components, such as blades, wheels, shafts; ② transmission components, such as gears, bearings; ③ Lord