Original scientific paper In order to reduce the testing costs for structural welded joints and production losses due to excavator standstill, a new method for integrity and reliability assessment of welded joints during exploitation of bucket wheel excavators has been developed. In this paper, a part of non-destructive testing results for the butt welded joints on bucket …
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Most common types of bucket wheels were analyzed by finite elements method in this paper. Also, relevant diagnostics parameters are defined for various constructions (stress concentration, deformation energy, distribution of potential and kinetic energy for main oscillation shapes). This approach enabled identification of weak spots and selection of such types of bucket wheel …
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Abstract The bucket wheel boom tie-rods are vital structural parts of the bucket wheel excavators (BWE). Their failures inevitably cause BWE collapse and are followed, among other things, by a substantial financial loss (millions of €). Non-destructive testing revealed a flaw in the butt welded joint of the body and eye-plate of the bucket wheel tie-rod.
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Calculation of the Structural Elements of the Bucket Wheel Excavator Working Wheel Transmission 1243 Fig. 1. Bucket wheel excavator Fig. 2. Gear transmission of the bucket wheel excavator working wheel Previous knowledge of load and deformation status, as well as the dynamic behavior
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Jan 01, 2014 · Keywords: Bucket wheel excavator, structure, fatigue fracture 1. Introduction In-service behaviour of bucket wheel excavator (BWE), aimed to supply electrical power plants by coal, depends on * Darko Danicic. Tel.: +381648361474; fax: +381118120127. E-mail address: [email protected]
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wheel boom, response of mechanism for bucket wheel boom lifting, estimation of rheolinearity level, analysis of impact of counterbalance weight on the dynamic parameters and system response. Keywords: bucket wheel excavator, structure, dynamics, resistance to excavation, mechanisms. 1. INTRODUCTION The operation of the bucket wheel excavators
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The influence of structural parameters on response of bucket wheel excavator superstructure in the out-of-resonance region, XII International Scientific Conferece "Computer aided Engineering", Plenary Session, Szklarska Poręba, Poland, 25th-28th June, p. 12, 2014.
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in this paper is bucket wheel excavator SchRs740 boom structure. Bucket wheel excavator SchRs740 (Fig. 1) is operating at Tamnava West Field, Mining Basin Kolubara. Figure 1 Bucket wheel excavator SchRs740 . In order to determine the behaviour of the bucket wheel excavator SchRs740 boom structure, firstly the static and dynamic loads are analysed.
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periodically varying external load, such as bucket wheel stacker/reclaimers [10]. A methodology for monitoring and diagnostics of bucket wheel excavators in exploitation, with an aim to predict the potential problems, is presented in [11]. BWE SchRs 1760, Fig. 1, has been in operational mode for 85.000 hours (17 years) prior to the collapse, in
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After years of excavator`s operation in adverse conditions, one can expect a ratio between the bucket wheel drive and bucket wheel boom which may lead to impairment of structural integrity. Finite elements method is defined as a diagnostic tool for the anomalies occurrence prevention during operation, and the measured acceleration as a proof of the model's correctness i.e. …
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The appearance of cracks on load-bearing steel structure of compact, hydraulic bucket wheel excavator was a perennial problem. Unfavourable stress concentration, inadequate geometry and structure of materials, inadequate operational technology has led to crack appearance and reduced structural integrity.
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subsystems elements, bucket wheel drive system and supporting structure of bu cket wheel excavator. 3 Dynamics model of bucket wheel excavator Fig. 4 shows the kinematics scheme of the boom lifting drive system, consisting of the following: an asynchronous electric motor (EM), mechanical coupling
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Calculation of the Structural Elements of the Bucket Wheel Excavator Working Wheel Transmission 1243 Fig. 1. Bucket wheel excavator Fig. 2. Gear transmission of the bucket wheel excavator working wheel Previous knowledge of load and deformation status, as well as the dynamic behavior
Get a Quotethe appearance of cracks on load-bearing steel structure of compact, hydraulic bucket wheel excavator was a perennial problem. unfavourable stress concentration, inadequate geometry and structure of materials, inadequate operational technology has led to crack appearance and reduced structural integrity. finite elements method is defined in this paper as a diagnostic tool …
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10. Maneski T, Ignjatović D. Repair and reconstruction of bucket wheel excavators. Structural Integrity and Life 2004; 1: 9-28. 11. Maneski T, Ignjatović D. Structural performance diagnostics. Structural Integrity and Life 2004; 1: 3-7. 12. Markowski T, Mucha J, Witkowski W. FEM analysis of clinching joint machine's C-frame rigidity.
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In addition to the Bucket wheel excavator numerical analysis (FEA), a parallel experimental analysis of the original as well as the Two-wheel bogie failure Finite element analysis redesigned TWB is conducted on a test board especially designed for this purpose. it is conclusive that FEM model truly simulates the structural behavior of the
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Dec 02, 2018 · The low-frequency vibration of the bucket wheel excavator has an important impact on the fatigue life of the structures. For conventional vibration testing methods, it is difficult and expensive to excite the overall low-frequency vibration of the whole machine. Hence, in this paper, the excitation method that uses the belt-supporting rollers on the boom as an …
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PDF | On Jan 1, 2010, Daničić Darko and others published Structural diagnostics and behaviour of bucket wheel excavator | Find, read and cite all the research you need on ResearchGate
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The structural characteristics and steering behaviour of a six-track vehicle are described in this paper. Kinematic analysis for skid steering of a six-track vehicle under steady-state conditions on firm ground is conducted, with the relationship between thrust force and speed instantaneous centre of the track-terrain interface taken into consideration.
Get a QuoteAbstract Bucket wheel excavator ERs 1250 has been in operation for over 30 years in the Gracanica-Gacko mining basin. It is operating in very hard working conditions due to exploiting very solid material, which has adverse effects on the behavior of the whole structure. Bucket wheel excavator boom is a single tube approximately 20 m long. The crack was detected in a …
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