We take pride in our numerous delivery achievements by incorporating the know-how and high technical skills developed with fixed-pitch propellers into our environmentally friendly, high-efficiency variable-pitch propellers.
**Features** By controlling the wing angle, it becomes easy to move forward, stop, and reverse. When combined with side thrusters, it offers convenience in situations where frequent changes in ship speed are necessary, such as during entering and leaving ports or during docking and undocking. Additionally, it can respond immediately from full forward to full reverse during emergency stops. By adjusting the wing angle, the engine can always operate at the most efficient load, allowing for free adjustment of the ship's speed, which can lead to fuel savings and reductions in NOx emissions. Due to these advantages, it is widely adopted in various types of vessels, including fishing boats, tankers, ferries, and tugboats.
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**Merits** - Operations can be conducted to effectively utilize the main engine output and minimize fuel consumption. - By continuously operating from full forward to full reverse, efficient driving, high stopping performance, and reduced docking/undocking time can be achieved. - Fuel consumption can be reduced by operating at the optimal efficiency point, taking into account propeller propulsion efficiency and main engine fuel consumption. - Vessels with significant changes in loading conditions, such as trawlers and tugboats, can achieve the required speed or thrust. - During operations in rough weather, reducing the propeller pitch angle compared to normal operations can help avoid torque-rich conditions in the main engine.
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Applications/Examples of results
【 XS Type CPP 】 Mainly adopted for medium and small vessels with a power of 5,000 PS or less, it features a hydraulic cylinder that controls the blade angle, which is installed inside the cylinder shaft on the ship's interior side. The force generated by the hydraulic cylinder is transmitted to the propeller hub through a deflection rod (push-pull rod), changing the blade angle. The structure is simple, reducing maintenance costs. The inside of the hub is lubricated with grease, preventing oil leaks from the hub and eliminating concerns about environmental pollution. 【 XL Type CPP 】 Mainly adopted for large vessels with a power of 5,000 PS or more, it features a hydraulic cylinder that controls the blade angle, which is installed inside the propeller hub on the exterior side. The hydraulic cylinder installed inside the propeller hub can directly move the propeller blades, allowing for precise control of the blade angle. Additionally, with a deflection pressure set at a high pressure of 12.5 MPa, it can accommodate high output. Furthermore, by employing a flow direction control valve for blade angle control, even when the movement of the blade angle is slowed down by time programming, the movement is not in an inching operation but achieves smooth and delicate motion.
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.