One method for life time estimation of a bucket wheel machine for coal moving

7th International Conference on Advanced Concepts in Mechanical Engineering

Vîlceanu, Fl^1 ; Iancu, C.^2

University of Petroani, Petroani, Romania^1

Department of Engineering and Management of Technological Systems, University Constantin Brâncui of Târgu-Jiu, Târgu-Jiu, Romania^2

关键词: Effective resistances;    Fatigue cracking;    Geometric modeling;    Metal structures;    Nondestructive methods;    Operational safety;    Residual lifetime;    Welding details;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/147/1/012064/pdf
DOI  :  10.1088/1757-899X/147/1/012064

来源: IOP

【 摘 要 】

Rehabilitation of outdated equipment with lifetime expired, or in the ultimate life period, together with high cost investments for their replacement, makes rational the efforts made to extend their life. Rehabilitation involves checking operational safety based on relevant expertise of metal structures supporting effective resistance and assessing the residual lifetime. The bucket wheel machine for coal constitute basic machine within deposits of coal of power plants. The estimate of remaining life can be done by checking the loading on the most stressed subassembly by Finite Element Analysis on a welding detail. The paper presents step-by-step the method of calculus applied in order to establishing the residual lifetime of a bucket wheel machine for coal moving using non-destructive methods of study (fatigue cracking analysis + FEA). In order to establish the actual state of machine and areas subject to study, was done FEA of this mining equipment, performed on the geometric model of mechanical analyzed structures, with powerful CAD/FEA programs. By applying the method it can be calculated residual lifetime, by extending the results from the most stressed area of the equipment to the entire machine, and thus saving time and money from expensive replacements.