可靠性是机械产品的一个重要质量特性。对于可维修性机械产品的可靠性,一般可用在规定条件下和规定运行时间内,实现规定功能的概率来定量表示。图1为可维修性机械的故障率曲线。由图可知,初期故障(由于设计、制造和使用条件不当所造成的故障)率一般很高,但随着运行时间增长而减低;偶发故障期间是机械最稳定的工作时 Reliability is an important quality characteristic of mechanical products. The reliability of maintainability of mechanical products, generally available under specified conditions and the provisions of the operating hours, the probability of achieving the specified function to quantify. Figure 1 for the maintainability of the mechanical failure rate curve. The figure shows that the initial failure (due to the design, manufacture and use of improper conditions caused by the failure) rate is generally high, but with the increase of operating time and reduced; accidental failure period is the most stable mechanical work