The Equipment Fault Diagnosis Technique And Its Application In The Petrochemical Corporations

Since the fault diagnosis technology of equipments applies to the management and maintaince of equipments, it has brought enormous economic and social benefits to us and became an important matter in promoting the modernization of the equipment management. Based on detailed research content research significance implementary key and the development of maintaince thought established in the production practice of petrochemical industry ,and combined with the experience that has been got by us in engaging in the fault diagnosis of equipments for many years, this paper carries through application researches for the method of fault diagnosis that suits to the equipments of petrochemical corporations, and its primary contents include the following points.1. Using the time base locus (the time domain waveshape and the axes locus) to diagnose the common faults, such as imbalance unalignment friction and oil membrane whorl;2. Researched the mensuration method of phase analysis and discussed how to diagnose the faults using phase information;3. Applied the frequency domain analysis to the locale fault diagnosis;4. The frequency characters of the fault of equipments are often related to the rev frequency. If we need to obtain these frequency characters, we must adopt the full periods sampling technology. This paper introduces the principle the realization electrocircuit and the locale implement of the technology. Based on this, one can realize the phase spectrum analyses and the transient analyses of equipments;5. If we actualize on-line inspection to all important equipments, its cost will be high and this is unnecessary. We always depend on off-line polling system to accomplish the fault diagnosis and the maintainment. So this paper researched the fault diagnosis system of the polling equipments, designed the general structure and the software-hardware project of the system and brought forward the establishment of the database;6. This paper applied the theory and method of the diagnosis to the production practice, introduced a diagnosis example and validated the correctness of the theory and method.