Investigations of causes of dumping conveyor breakdown

• Autorzy: Rusiński E. , Czmochowski J. , Moczko P.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main purposes of the paper are to discuss designing and exploitation problems of machines used in strip mines and investigation of its reasons based on steering frame breakdown of the dumping conveyor. Design/methodology/approach: Numerical (FEM) and experimental approach was used to investigate reasons of the breakdown. Fractographic and microscopic evaluation and chemical analysis, were used to perform material evaluations. The objectives are achieved by analysis of the numerical simulations results and data coming from material evaluations. Additionally the new design of the steering frame was discussed in order to prevent future similar problems in the half-shafts systems. Findings: The causes of break-down of the steering frame were found. Designing and manufacturing problems were the main reasons of the failure. The undercarriages half shafts systems of the open pit machines are prone to break-downs. They require detailed analysis to be successfully implemented into steering system. Recommendations for the single shaft system are given in the paper. Research limitations/implications: There are horizontal forces acting on safetying in the half-shaft undercarriage systems, which are limited by the friction in the supporting areas. Investigations of the static and sliding friction coefficients should be performed to estimate correct forces and optimal designing rules. Practical implications: The study provides practical implication into designing of half-shafts undercarriage systems and their safetyings. Discussed design of the safetying should be redesigned or the half-shaft system should be changed into one shaft design. Originality/value: The paper provides information backed by evaluation and test results, stating the nexus of causes of the dumping conveyor failure. The experimental and numerical approaches show relationship between designing and manufacturing process of machines. This can be helpful for the designers and researchers looking for reasons, methods of investigations or how to prevent failures of similar machines.

Słowa kluczowe

EN

CAD/CAM; constructional design; material; metallography

PL

CAD/CAM; projektowanie konstrukcji; materiał; metalografia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 24, nr 1
• Strony: 267--274
• Opis fizyczny: Bibliogr. 20 poz., fot., rys., tab.

Twórcy

autor

Rusiński E.

autor

Czmochowski J.

autor

Moczko P.

• Institute of Machines Design and Operation, Wroclaw University of Technology, ul. Lukasiewicza 7/9 51-370 Wrocław, Poland,

Bibliografia

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