Marine Propulsion System

The propeller blades are the main part of the propeller that generates thrust. Its shape is usually twisted, extending outward from the hub. The number of propeller blades is generally 3-6 pieces. The hub is the part that connects the propeller blades and the ship's power shaft. Its main function is to transmit power to the blades, allowing them to rotate stably.

The manufacturing process of propeller shafts includes forging, cutting, and heat treatment. Forging is to improve the internal structure of the shaft material, enhance its strength and toughness. The forged shaft body needs to be cut to obtain precise dimensions and surface smoothness. For example, machining key slots, threads, and other structures on the shaft body for installing couplings and other components.

When the ship needs to change course, the servo drives the rudder stock to rotate through a transmission device (such as a hydraulic system or an electric system), and the rudder stock drives the rudder blades to rotate around the axis. When the rudder blade rotates in water, it changes the direction of the water flow, thereby generating a hydrodynamic force perpendicular to the direction of the water flow. This hydrodynamic force generates a turning moment on the center of gravity of the ship, causing it to rotate around its center of gravity and thus change its course.