论文部分内容阅读
我们知道机械设备有三种不同寿命——设计寿命、技术寿命和经济寿命。所谓设计寿命是在机械设计时,按机械的磨损理论和强度理论,根据计算及试验所确定的机械损坏至无使用价值所经历的时间;而技术寿命是由于技术进步,原机的技术经济指标落后被硬性淘汰,由开始起用至被淘汰所经历的时间,在现今技术突飞猛进的情况下,技术寿命将是越来越短;经济寿命则是从成本观点上研究设备更新的最佳周期。如果使用新设备其耗用的成本费低于使用旧设备,就应更新;如果使用旧设备,其耗用的成本费低于换用新设备就不必更新,所以经济寿命应该是研究设备更新时主要考虑的问题。
We know that mechanical equipment has three different life spans - design life, technical life, and economic life. The so-called design life is the mechanical design time, according to mechanical wear theory and strength theory, according to the calculation and test determined by the mechanical damage to no use value of the time; and technical life is due to technological progress, the original machine’s technical and economic indicators Backwards are hard phased out, from the time they are used until they are eliminated. With today’s technology escalating, technology life will be shorter and shorter; economic life is the best cycle for investigating equipment renewal from a cost perspective. If the cost of using a new device is lower than the cost of using the old device, it should be updated; if the old device is used, the cost of its cost will be lower than if the new device is replaced, so the economic life should be when the device is updated. The main considerations.