We have successfully developed the world's first CFRP propeller for general commercial vessels.
The greatest features, "high efficiency" and "quietness," are performances created by maximizing the properties of the materials. In 2015, we received the Prime Minister's Award at the 6th Monozukuri Nippon Grand Award for the development of the world's first carbon fiber reinforced plastic propeller installed on a commercial ship that achieves energy conservation. Lightweight - Achieved lightweight due to a specific gravity of about 1/5 that of conventional materials, making installation easy. - Reduction of moment of inertia and lightweighting of the shaft system. High Strength - Higher fatigue strength and reliability compared to conventional materials. Low Vibration - Vibration is reduced due to lightweighting and high damping rate. - Improvement of living environment. Overload Reduction - The shape of the blades deforms to match the flow, reducing overload during rough weather and other conditions. High Efficiency - Lightweighting allows for easy increase in diameter, achieving improved propeller performance. - Suppression of cavitation occurrence. Improved Maintainability - By stocking spare blades, quick response is possible even in case of damage. - No specialized knowledge required for replacement, and repairs are also possible.
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basic information
【 Reduction of Torsional Vibration Stress 】 CFRP is lighter and stronger than conventional propeller material NAB, resulting in a smaller propeller weight and moment of inertia, which reduces torsional vibration stress. Additionally, CFRP has higher damping than conventional propeller material NAB, contributing to noise suppression and further reduction of torsional vibration stress. 【 Elastic Deformation 】 Due to deformation in the direction of decreased pitch with increased load, during rough weather (sudden load fluctuations) or during acceleration, elastic deformation allows the flow to dissipate forces, thereby suppressing engine overload. 【 Suppression of Cavitation 】 CFRP propellers deform under load, which helps suppress the occurrence of cavitation, leading to a reduction in stern vibrations.
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Applications/Examples of results
There are proven applications in chemical tankers, passenger ships, fishing boats, and others.
Company information
Nakashima Propeller Co., Ltd. has been producing ship propellers that meet our customers' needs. We have developed and expanded the technology and philosophy of custom-made production, honed through propeller manufacturing, into various fields such as healthcare, daily life, and the environment. Moving forward, we aim to tackle the challenge of accurately responding to each of our customers' diverse needs, continuously pursuing new possibilities and shaping the infinite potential that lies beyond.
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