Understanding and managing the safety and reliability issues of ocean energy converters is a key factor in the development of viable technologies. The present article deals with wear in the high-pressure hydraulic power take-off machinery in a heaving-buoy wave energy converter. In this study, an abrasive wear model for such machinery is developed for the steady-state operation by considering the effects of sealed pressure, relative velocity, material properties, time-varying environmental conditions, and lubrication, with a focus on the piston ring. In particular, the dependence of the wear damage on the sea state condition is investigated. The dynamic parameter named instantaneous wear work rate (Load x Velocity) is numerially calculated in the time domain. An estimate of the average wear work rate in each sea state is computed on the basis of a wave scatter table (significant wave heights versus peak period). Long-term wear damage can then be accounted for by summing up the short-term wear damage multiplied with the occurrence probability of each sea state Finally, the relative contribution of wear damage from different sea states is obtained.


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    Titel :

    Numerical modeling of wear damage in seals of a wave energy converter with hydraulic power take-off under random loads


    Beteiligte:
    Yang, Limin (Autor:in) / Moan, Torgeir (Autor:in)

    Erschienen in:

    Tribology Transactions ; 54 , 1 ; 44-56


    Erscheinungsdatum :

    2011


    Format / Umfang :

    13 Seiten, 13 Bilder, 1 Tabelle, 33 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch