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The effect of misalignment on performance characteristics of engine main crankshaft bearings |
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| Institution: | 1. Mechanical Engineering Department, Guelma University, B.P. 401 Guelma 24000, Algeria;2. Solid Mechanics Laboratory, URA-CNRS, University of Poitiers, France;1. Institute of Noise & Vibration, Naval University of Engineering, Wuhan 430033, PR China;2. National Key Laboratory on Ship Vibration & Noise, Wuhan 430033, PR China;1. Centro Universitario de la Defensa. Academia General Militar. Crta. Huesca s/n. 50090, Zaragoza, Spain;2. Department of Design and Manufacturing Engineering, University of Zaragoza. María de Luna 3, 50018 Zaragoza, Spain |
| Abstract: | The effect of static misalignment on the dynamic behaviour of a main crankshaft bearing is examined in this paper. The mobility method of Booker is used to predict the performance parameters of the bearing such as the minimum oil-film thickness and the journal centre cyclic path under dynamic load conditions. The theoretical results are compared with those of an aligned bearing. The Ruston–Hornsby 6 Veb-X Mk III engine big-end bearing is selected as an example to validate the computer program incorporating the present analysis. It is shown that the misalignment has significant effects on the minimum film thickness and the journal centre trajectories even for the low values of misalignment parameters. It is also found that the presence of circumferential feed grooves can cause metal-to-metal contact in such bearings. |
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