The Research On Structure Security Evaluation And Reliability Of Gate Crane Jib System

Most active gate crane has been reached or soon to reach service life, because of funding and actual needs, the crane will not be easy to replace, the crane's safety and reliability issues have become increasingly prominent. The jib system is one important load bearing parts of gate crane, and its overall performance quality has the immediate influence to the complete machine normal work. Active duty gate crane has used many years, and it has already presented many security hidden dangers. For example, the rivet falls off, the fatigue cracks, the corrosion thins and so on.In view of the above question, this article takes the jib system of active duty 75t gate crane as the object of study, with the reference massive hoist crane paper and the gate crane design handbook and unifies the data which the factory provides, and we have conformed to the actual movement load and the operating mode of the jib system.. Because s the object has used the riveted joint and the welding structure massively, we can apply"moves main - from the restraint"the method, unify the actual observation result, complete the jib system in the I-DEAS software to receive the system key component's three dimensional model, carry on the finite element analysis, and try in this part observation spot different operating mode stress and the distortion rule through the computation.This article by the reliability has carried on the FMEA analysis and FTA analysis to the jib system of gate crane, which proposes attention item of the gate crane in using.The practice indicates that the research, which results to the gate place crane's maintenance, the service and the maintenance, will provide the beneficial theory basis.