SpringerLink Springer Engineering eBooks 2017 English+International

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Preface; Contents; Jerzy Czmochowski; Damian Pietrusiak; 1 Introduction; 2 Main Problems Related to the Operation and Maintenance of Mega Machines; 2.1 Introduction; 2.2 The Design of Surface Mining Machines; 2.2.1 Bucket-Wheel Excavators; 2.2.2 Bucket-Chain Excavators; 2.2.3 Spreaders; 2.3 Main Mechanical and Structural Subassemblies of Surface Mining Machines and the Problems that Occur During Their Operation; 2.4 Main Phenomena During the Operation of Surface Mining Machines; 2.5 Disadvantages of Traditional Methods of Dimensioning Surface Mining Machines; References.

3 Methods of Condition Assessment3.1 Experimental Methods; 3.2 Analytical and Numerical Methods; 3.3 Preventive and Predictive Approaches in Condition Assessment; 3.4 Combined, Comprehensive Experimental and Numerical Condition Assessment Method; 3.4.1 Identification of Loads; 3.4.2 Identification of State of Stress; 3.4.3 Methodology of Fatigue Calculations; 3.5 Examples; 3.5.1 Tests on the SRs 2000 Excavator; 3.5.2 Tests on the SchRs 4000 Excavator; 3.5.3 Tests on the KWK1500 Excavator; References; 4 Failure Analysis; 4.1 Methods; 4.2 Examples; 4.2.1 KWK 1400 Excavator Collapse.

4.2.2 Failure and Repair of the SRs 2000 Excavator Supports4.2.2.1 Repair Technology; 4.2.3 Fracture of a Half Axle of Crawler Track Set in the ZGOT-11500.100 Stacker; 4.3 Summary; References; 5 Modernization of Existing Machines; 5.1 Objectives of Modernizations-Increase in Lifetime of Machines and the Optimization of Operational Parameters; 5.2 Modernizations-Examples of Solutions; 5.2.1 Modernization of Buckets; 5.2.2 Load-Carrying Structure of the KWK jib; 5.2.3 Modeling and Modification of Modal Characteristics of the KWK 1500.1 Excavator; 5.2.4 Modernization of Portals.

5.2.5 New Solutions Introduced to Surface Mining Machines5.3 Case Study; References; 6 Summary and Conclusions; References; Index.

This unique volume imparts practical information on the operation, maintenance, and modernization of heavy performance machines such as lignite mine machines, bucket wheel excavators, and spreaders. Problems of large scale machines (mega machines) are highly specific and not well recognized in the common mechanical engineering environment. Prof. Rusiński and his co-authors identify solutions that increase the durability of these machines as well as discuss methods of failure analysis and technical condition assessment procedures. "Surface Mining Machines: Problems in Maintenance and Modernization" stands as a much-needed guidebook for engineers facing the particular challenges of heavy performance machines and offers a distinct and interesting demonstration of scale-up issues for researchers and scientists from across the fields of machine design and mechanical engineering.