An analysis of the causes of a BWE counterweight boom support fracture

Rusiński, E.; Czmochowski, J.; Iluk, A.; Kowalczyk, M.

doi:10.1016/j.engfailanal.2009.06.001

Cited by 60 publications

(22 citation statements)

References 5 publications

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“…However, the acceleration is measured at the identified weak spots and their level proved that calculation loads should be 1,25-1,5 times higher to obtain a true behaviour of the structure. Authors of the paper [8], taking into account that the loading of the excavator is dynamic (not static), introduce the term "amplitude of stress changes".…”

Section: Zone Of Interestmentioning

confidence: 99%

“…There are many examples of failure of the bearing structure and mining machinery structural parts [2][3][4][5][6][7][8]. The object of observation in this paper is a crack that has occurred on gusset plate of pylon vertical truss of bucket wheel excavator (BWE) SchRs630.…”

Section: Introductionmentioning

confidence: 99%

“…The significance of the fact that the excavator is a dynamically loaded machine was emphasized in the papers [7,8]. Thus, the authors of the paper [7], analysing the occurrence of cracks on slew platform of excavator…”

Section: Introductionmentioning

confidence: 99%

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Identification of Crack Initiation Cause in Pylons Construction of the Excavator SchRs630

et al. 2018

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A crack occurred on gusset plate of pylon vertical truss of bucket wheel excavator (BWE) SchRs630. Numerical calculation model of pylons, slewing platform and undercarriage was formed. Calculations are done using finite element method (FEM) for different load cases. It was determined that the inertial forces caused by bucket wheel boom and counterweight boom masses while breaking slew drive cause the stress concentration in this spot. To complete the whole picture of the structure behaviour dynamic analysis was performed. Based on calculation and distribution of potential and kinetic energy on oscillation modes, using the reanalysis method, redesign of this part of the structure was proposed. The stress was reduced by over 20 % by the proposed redesign solution.

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Section: Zone Of Interestmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Identification of Crack Initiation Cause in Pylons Construction of the Excavator SchRs630

et al. 2018

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“…However, non-replacement of cutting teeth manifests itself as increased vibrations of the machinery during mining. This increased strain may lead to fatigue cracks on the bearing steel parts of the machinery which may further lead to serious damage of machinery (Bošnjak et al 2010(Bošnjak et al , 2011Rusiński et al 2010a).…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis of Tangential Digging Forces of the Bucket Wheel Excavator SCHRS 1320 for Different Terraces

Gottvald

Kala

2012

Journal of Civil Engineering and Management

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Abstract. Researches in the field of economy of control of mining processes of minerals are continually met with a number of unsolved and newly arising problems. New deposits of brown coal are located at greater depths than before and are more difficult to mine. Problems in the field of rock mining stem from the greater diversity of rocks in mining, and it results in more difficult mining conditions. On the other hand, even greater demands are made to decrease the economic demand of mining. Current research is aimed at the most optimal utilization of energy provided on the bucket wheel of excavators, such that the energy demand of the mining process decreases, whilst preserving maximum performance. These requirements place greater demands on the precision of planning of mining and maximum economic efficiency. The presented article illustrates the possibilities of the utilization of Sobol sensitivity analysis during the investigation of the influence of the parameters of mining processes on tangential digging forces. Analyses are carried out for the mining process of bucket wheel excavator SchRs 1320. For purposes of the study, detailed measurements of operational parameters were performed on the excavator during a whole work cycle.

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“…3, the grid of measurement points does not cover the entire machine and there is no justification as to why these particular points were selected. Particular attention should [37] be paid to the points that measure acceleration and are located on the undercarriage. Given the nature of vibrations in the presented structures [11,28,30], it can be assumed that the values measured in these points will not be large.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of large-scale load-carrying structures of machines with the application of the dynamic effects factor

Pietrusiak¹

2017

EiN

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An analysis of the causes of a BWE counterweight boom support fracture

Cited by 60 publications

References 5 publications

Identification of Crack Initiation Cause in Pylons Construction of the Excavator SchRs630

Identification of Crack Initiation Cause in Pylons Construction of the Excavator SchRs630

Sensitivity Analysis of Tangential Digging Forces of the Bucket Wheel Excavator SCHRS 1320 for Different Terraces

Evaluation of large-scale load-carrying structures of machines with the application of the dynamic effects factor

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