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State of the Art and Conceptual Design of Robotic Solutions for In Situ Hard Coating of Hydraulic Turbines

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Abstract

Hydropower turbine’s blades are constantly exposed to abrasion and cavitation phenomena, demanding regular maintenance for flow stability. Hard coating techniques by thermal aspersion are used to reduce the mechanical wear, thus increasing blade’s life cycle, and turbine efficiency. Currently, applying a new coating layer requires turbine disassembling and recalibration. EMMA is a robotic system to perform hard coating by thermal spray on hydraulic turbine blades within the turbine environment, i.e., hard coating application to an installed blade, significantly reducing the turbine downtime. This document is a study of the state of the art of in situ hydropower turbine robotic systems and describes the conceptual designs for EMMA. The results outlines the next steps for EMMA and future projects in the same area.

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Notes

  1. https://www.hydropower.org/.

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Acknowledgements

We gratefully acknowledge the financial support of Energia Sustentável do Brazil and the ANEEL R&D program (contract COPPETEC/UFRJ JIRAU 09/15 6631-0003/2015).

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Authors and Affiliations

  1. Department of Electrical Engineering, COPPE UFRJ, Rio de Janeiro, Brazil

    Renan S. Freitas, Gabriel A. C. Silva, Eduardo E. M. Soares & Ramon R. Costa

  2. Department of Mechanical Engineering, COPPE UFRJ, Rio de Janeiro, Brazil

    Estevão F. Ferrão

Authors
  1. Renan S. Freitas
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  2. Gabriel A. C. Silva
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  3. Eduardo E. M. Soares
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  4. Estevão F. Ferrão
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  5. Ramon R. Costa
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Correspondence to Renan S. Freitas.

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Freitas, R.S., Silva, G.A.C., Soares, E.E.M. et al. State of the Art and Conceptual Design of Robotic Solutions for In Situ Hard Coating of Hydraulic Turbines. J Control Autom Electr Syst 28, 105–113 (2017). https://doi.org/10.1007/s40313-016-0287-6

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  • DOI: https://doi.org/10.1007/s40313-016-0287-6

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