Analysis of the Equipment’s Maintenance Period Under Different Operation Stages

Abstract

To improve the equipment’ operation efficiency, this paper discusses the various maintenance strategies in different employ stages by analyzing the rules of devices faults and the maintenance methods. Results shown, when the faults take place in chance fault stage, i.e., fault rate ${\lambda^\prime}(t) = 0$, it is impossible to improve the operation efficiency of the devices when preventive maintenances are made. When the faults take place in wear out fault stage and initial fault stage, i.e., fault rate ${\lambda^\prime}(t) \ne 0$, the best time for maintenance T should satisfy $\int_0^T {t{\lambda^\prime}} (t)dt = {t_p}/{t_f}$. Meanwhile, on the basis of the broken-down data of Series Air Compressors (ZW-17/29) in using, we find the suitable time for maintenance T in wearing stage and bring the relevant maintenance plans.