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Mathematical Model for the Kinematics of a Continuous Ship Unloader


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DOI: https://doi.org/10.15866/irece.v9i6.16719

Abstract


Unlike traditional portal cranes, a Continuous Ship Unloader (CSU) is not hampered by an intermittent offloading mechanism. The digging foot, consisting of an endless chain with offloading buckets, allows reaching very high capacities when unloading large Panamax vessels carrying iron ore or coal. However, severe problems were reported with the hydraulic control system of the CSU during service. Measurements of cylinder displacements and hydraulic pressures revealed that the digging foot fails to follow the imposed positions. A profound kinematic analysis, presented in this paper, sheds a brighter light on the evolution of the chain length during the transition from idle state to bypass. The aberrations in the calculated chain sag can explain why some imposed positions cannot be obtained by the hydraulic control system.
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Keywords


Kinematics; Continuous Ship Unloader; Digging Foot; Chain Length

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References


C. F. Alsop, G. A. Forster and F. R. Holmes, Ore Unloader Automation – a Feasibility Study, Proc IFAC Symp, pp. 295-305 (1965)

Y. Sassa et.al., Continuous Ship Unloader for Coke Unloading, Fuel and Energy Abstracts 77, pp. 41-46 (1998).

C. S. Park and Y.D. Noh, An Interactive Port Capacity Expansion Simulation Model, Engineering Costs and Production Economics 11(1), pp. 109-124 (1987)

Continuous Ship Unloader Operating and Maintenance Manual (1999).

F. Darko and W. Dierick, Continuous Ship Unloader for Iron Ore and Coal, Internship Report, Department Harbour, Transport and Recycling, ArcelorMittal Gent

A. Noca, Mathematical Model for a Continuous Ship Unloader, M. Sc. dissertation, Department of Mechanical Construction and Production, Faculty of Engineering, Ghent University, 2006.

J. Van Wittenberghe, Global Positioning System for the Digging Foot of a Continuous Ship Unloader, M. Sc. Dissertation, Department of Mechanical Construction and Production, Faculty of Engineering, Ghent University, 2006.


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