О надежности технических устройств, прошедших ремонт

Abstract

Article purpose – to offer and investigate expressions for definition of average failure rate and a time between failures of the repaired technical devices, the non-failure operation restitutions differing in depth.Value of average failure rate with decrease of frequency and number of repairs decreases to replacement of technical devices, and with decrease of depth of restitution of non-failure operation increases. Varying depth of restitution of non-failure operation or frequency and the number of preventive repairs for endurance, it is possible to provide practically any preset value of average failure rate of technical devices. The time between failures of technical devices significantly depends on depth of restitution of non-failure operation when carrying out their preventive repair. There are boundary values of frequency and depth of restitution of non-failure operation at which carrying out preventive repairs is inexpedient as the time between failures of technical devices in these cases becomes lower, than in the absence of such repair. There are limiting values of depth of restitution of non-failure operation at which carrying out preventive repairs with any frequency reduces a time between failures of technical devices and carrying out such repairs is inexpedient. The received results show that under operating conditions due to change of frequency of carrying out preventive repairs and depth of restitution of non-failure operation it is possible to provide a desired value of a time between failures of technical devices. For technical devices, with obviously expressed processes of an aging and wear, effectiveness of carrying out preventive repair increases. In this case with other things being equal at the technical devices having distribution of a time between failures with smaller value of a variation factor, average failure rate is lower.