Characteristics of the propulsion shafting alignment for a small class electric propulsion ship equipped with a reduction gear
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초록
In response to the International Maritime Organization’s (IMO) strengthened marine environmental regulations and the trend of high oil prices, newly built ships are increasingly adopting eco-friendly technologies. Large vessels engaged in international navi-gation typically employ dual-fuel diesel engines based on low-carbon or zero-carbon fuels, while small vessels operating mainly in coastal waters utilize electric propulsion systems powered by batteries. To optimize the performance of propellers, which are more efficient at low rotational speeds, these systems often incorporate reduction gears. The integration of reduction gears necessitates care-ful shaft alignment to prevent quality issues such as misalignment-induced bearing damage. While classification societies generally do not mandate shaft alignment analysis for propeller shafts with diameters under 400 mm, they recommend evaluating the bearing reac-tion forces of reduction gear shafts during the design phase to ensure reliability. This study investigates the static and dynamic alignment characteristics of propulsion shafting systems equipped with reduction gears in small electric propulsion vessels. Key findings highlight the impact of dynamic loads on bearing reaction forces and the need for adjustments to maintain alignment under varying conditions. An optimal alignment configuration is proposed to enhance design sta-bility, thereby contributing to safer and more efficient propulsion systems for small vessels.
Abstract
In response to the International Maritime Organization’s (IMO) strengthened marine environmental regulations and the trend of high oil prices, newly built ships are increasingly adopting eco-friendly technologies. Large vessels engaged in international navi-gation typically employ dual-fuel diesel engines based on low-carbon or zero-carbon fuels, while small vessels operating mainly in coastal waters utilize electric propulsion systems powered by batteries. To optimize the performance of propellers, which are more efficient at low rotational speeds, these systems often incorporate reduction gears. The integration of reduction gears necessitates care-ful shaft alignment to prevent quality issues such as misalignment-induced bearing damage. While classification societies generally do not mandate shaft alignment analysis for propeller shafts with diameters under 400 mm, they recommend evaluating the bearing reac-tion forces of reduction gear shafts during the design phase to ensure reliability. This study investigates the static and dynamic alignment characteristics of propulsion shafting systems equipped with reduction gears in small electric propulsion vessels. Key findings highlight the impact of dynamic loads on bearing reaction forces and the need for adjustments to maintain alignment under varying conditions. An optimal alignment configuration is proposed to enhance design sta-bility, thereby contributing to safer and more efficient propulsion systems for small vessels.
참고문헌 (19)
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