Study of vibration reducing crankcase covers
Niiranen, Eerika (2025)
2025
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2025050910248
https://urn.fi/URN:NBN:fi:amk-2025050910248
Tiivistelmä
This thesis was commissioned by Wärtsilä Finland Oy. The aim of this thesis was to study whether bushings added to the crankcase covers reduce the vibration levels in Wärtsilä 46F and 46DF engines.
In the theoretical part of the thesis, general information about materials and manufacturing techniques, as well as vibration theory, is introduced. A literature review was conducted on manufacturing techniques, examining the development and profitability of low-pressure casting.
In the practical part, a modified crankcase cover was designed with a metal-rubber-metal bushing in each corner. This cover was simulated using SimSolid, and the results show a significant reduction in vibration levels.
Finally, the properties and actual use of the modified cover are analysed based on the simulation results. Development proposals are considered and presented.
In the theoretical part of the thesis, general information about materials and manufacturing techniques, as well as vibration theory, is introduced. A literature review was conducted on manufacturing techniques, examining the development and profitability of low-pressure casting.
In the practical part, a modified crankcase cover was designed with a metal-rubber-metal bushing in each corner. This cover was simulated using SimSolid, and the results show a significant reduction in vibration levels.
Finally, the properties and actual use of the modified cover are analysed based on the simulation results. Development proposals are considered and presented.