Propeller with combined continuous fiber reinforced composite blades for ship

Abstract

The invention belongs to the technical field of propellers and relates to a propeller with combined continuous fiber reinforced composite blades, in particular to a propeller with combined continuous fiber reinforced composite blades for a ship. The propeller with the combined continuous fiber reinforced composite blades for the ship is characterized in that the assembly surfaces of dovetail grooves in a propeller hub and blade roots are planes, and thus the assembly positioning precision of the dovetail grooves and the blade roots is high; the blades are inserted from large ends of the dovetail grooves in the propeller hub, then an end cap is fixed to the propeller hub to exert fastening force so as to mount the blades in position, thus mounting is convenient, and the composite blades are not damaged; the space between the dovetail grooves and the blades is filled with resin adhesive, the end cap and the propeller hub are fixed, the blades are not loosened, dropped or damaged under a working condition after testing, and thus the propeller has high reliability; and the structure, performance and manufacturing features of the composite blades are fully taken into account in the aspect of designing of the dovetail grooves in the propeller hub, and thus the blades are suitable for various immersion propellers and water surface propellers.

Description

technical field [0001] The invention belongs to the technical field of propellers, and relates to a combined continuous fiber reinforced composite material blade propeller, in particular to a combined continuous fiber reinforced composite material blade propeller for ships. Background technique [0002] The traditional propeller blades commonly used in modern ships are basically made of metal materials. Compared with traditional metal propellers, propellers made of continuous fiber reinforced composite materials have the characteristics of low vibration, low noise, light weight and high efficiency, seawater corrosion resistance, and easy maintenance. Composite propellers have huge advantages in both military and civilian fields. application potential. However, most of the research on propellers using fiber-reinforced composite materials to make blades focuses on composite blade layup and structural design. For example, Chinese patents CN 101706832A and CN 101706833A both in...

AI Technical Summary

Problems solved by technology

The disadvantage is that it is not easy to apply a large fastening force when the wedge iron is used to fasten the blade root. If the wedge iron is not wedged in place, it is difficult to ensure the installation positioning accuracy and firmness. If the tightening force is too large, the wedge iron will not It is easy to cause damage to the composite material blade root, and the magnitude of the fastening force is difficult to control

Chinese patent CN 102930116A relates to a detachable composite material propeller, which adopts the method of setting a boss on both sides of the wedge-shaped blade root to realize positioning and assembly, but the existence of the boss will affect the accuracy of the blade root and hub forming process. The requirements are very high, the difficulty is very high, it is easy to get stuck during the assembly operation, and the practical application feasibility is not high

German patent DE4211202A1 uses dovetail slots of equal width to connect blades and hubs. The disadvantage is that the assembly surface of the dovetail slots is a curved surface, which is difficult to process and position.

The traditional wedge-shaped blade roots of the propeller blades in the above patents are of equal width and are mainly positioned by the two sides, so the manufacturing or machining accuracy of the two sides is required to be high; moreover, the blade root and the groove on the blade hub adopt an interference fit To ensure the positioning accuracy, there is a large friction force between the blade root and the inner wall of the blade groove during assembly, and the blade root of the composite material blade is easily damaged and affects the bearing capacity.

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