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可靠性是产品在规定的条件下、规定的时间内,完成规定功能的能力。可靠性工程包括可靠性技术和可靠性管理两个方面。其目的是提高装备的完好性和任务的完成性,减少全寿命期费用。航空发动机是高速高温燃烧气体在高负荷下工作的动力机械。这种复杂的热力旋转机械是综合运用了气动热力学、燃烧学、结构力学、自动控制技术以及材料、工艺、测试等方面的科技成果而研制出来的。由数以万计精密零部件组合在一个尺寸受到严格限制的空间内的燃气涡轮发动机,要求它在压力、温度、转速和应力变化范围很大的严酷条件下。不仅要满足性能、作战适用性、环境等方面的许多特殊要求,而且还要持久、可靠地工作。由此对航空发动机的可靠性要求比一般机械产品的可靠性要求更高,难度更大。
Reliability is the ability of the product to perform the prescribed functions within the prescribed time and under the specified conditions. Reliability Engineering includes both reliability and reliability technologies. Its purpose is to improve the integrity of the equipment and the completion of the mission, reducing the cost of the entire life cycle. Aero-engines are high-speed, high-temperature combustion gases that operate at high loads. This complex thermal mechanical rotation is the synthesis of the use of aerodynamic, combustion, structural mechanics, automatic control technology and materials, technology, testing and other aspects of scientific and technological achievements developed. Gas turbine engines, assembled from tens of thousands of precision components in a tightly-constrained space, require it to operate under harsh conditions where pressure, temperature, speed and stress vary widely. Not only do we have to meet many special requirements in terms of performance, operational suitability, environment, etc., but we also need to work long-lasting and reliably. As a result, the reliability requirements of aeroengines are more demanding and more demanding than the reliability of general mechanical products.