Determination of Geometrical Deviations of Large-Size Crankshafts with Limited Detection Possibilities Resulting from the Assumed Measuring Conditions

Krzysztof Nozdrzykowski (), Zenon Grządziel, Rafał Grzejda and Mateusz Stępień
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Krzysztof Nozdrzykowski: Faculty of Marine Engineering, Maritime University of Szczecin, 2 Willowa Str., 71-560 Szczecin, Poland
Zenon Grządziel: Faculty of Marine Engineering, Maritime University of Szczecin, 2 Willowa Str., 71-560 Szczecin, Poland
Rafał Grzejda: Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, 19 Piastow Ave., 70-310 Szczecin, Poland
Mateusz Stępień: Piping Company ‘Chemar Rurociągi’ Sp. z o. o., 6 Olszewskiego St., 25-663 Kielce, Poland

Energies, 2023, vol. 16, issue 11, 1-19

Abstract: This article deals with the geometrical deviation measurements of crankshafts of large marine engines fuelled with conventional or alternative fuels, taking into account the problem of their deformability. Since the detectability of geometrical deviations of a crankshaft supported by prisms depends largely on the support conditions assumed and the parameters of the method, the study was carried out for two cases of crankshaft support. The first case concerned measurements of the main journals of a crankshaft seated on a set of supports pre-positioned at an equal height. In contrast, the second case involved measurements of the main journals of a crankshaft seated on supports pre-positioned at various heights. In particular, the research focused on evaluating the effect of sensor location angle on the results of measurements of deviations and contour profiles of the crankshaft main journal system. The results of the research are the developed procedures, the application of which in practical measurements under workshop conditions, where there is no access to coordinate measuring machines, enables correct interpretation of the measurement results and evaluation of the geometrical state of the measured crankshaft.

Keywords: energy machines; large-size crankshafts; support conditions; elastic deformations; geometrical deviations; harmonic analysis; method parameters (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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