Failure Analysis on Mechanical Equipments (Continued) Lecture 8 Failure Diagnosis and Prevention Technology (1)

The basic content and diagnosis basis of failure diagnosis are introduced. It is considered that the failure law of mechanical equipments is the same as the general law of development and change of things; that is to say, the failure always occurs at the weak part of the system and originates from the stress concentration area of the components. The life course of mechanical equipments is divided. The failure factors in the links from raw materials to design, processing, inventory, transportation, assembly and service of products are classified and described, the main failure modes, failure mechanism and failure diagnosis basis of each link are summarized, and the basic principles and procedures of failure prevention are introduced. Combined with some typical cases in practical analysis, the diagnosis process of several different failure modes and the application of failure prevention techniques in safety service of mechanical equipments are introduced.