Horizontal foldable self-retractable airfoil sail

Abstract

The invention discloses a horizontally foldable and automatically retractable airfoil sail. The upper end of a multi-section main mast is fixed with a first fixed pulley, the right end of the upper frame cross bar is fixed with a second fixed pulley, and the lower right end of the frame cross bar is fixed. The third fixed pulley is fixed; the left ends of the upper and lower spring telescopic rods are respectively fixedly connected to a corresponding frame cross bar, and the right ends are respectively fixedly connected to a corresponding slider located in the card slot; One sail body is fixed to the mast, the upper end of the second sail body is fixed to the first slider above the mast, and the lower end is fixed to the second slider below; one end of the first cable is fixedly connected to the lower end inside the base and the other end It is fixedly connected to the first slider; one end of the second cable is fixedly connected to the upper end inside the multi-section main mast, and the other end is fixedly connected to the second slider; only the hydraulic lifting rod is used as the power to drive the sail to automatically unfold and retract Therefore, the utilization rate of wind energy has been improved.

Description

technical field [0001] The invention relates to a sail installed on a ship, which can use wind force to propel the ship when it is unfolded, in particular to an automatically retractable airfoil sail. Background technique [0002] During the development of ship navigation, sails have experienced from ancient soft sails to modern hard sails. The sails have appeared in triangular sails, quadrilateral sails, and curved sails, and have developed to today's airfoil sails. The upper surface of airfoil sails Curved, the lower surface is flat, and when the sail wing moves relative to the air, the air flowing over the upper surface travels a longer distance than the air flowing over the lower surface at the same time, so the relative speed of the air on the upper surface is faster than that of the lower surface. The air on the surface is small, so the air on the upper surface exerts less pressure on the sail than the air on the lower surface, and the resultant force of the upper and ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low utilization rate of wind energy in existing sails with adjustable size and position, and propose a horizontally foldable and automatically retractable airfoil sail, which adopts a symmetrical airfoil sail surface and only uses hydraulic elevating rods It is driven by power to expand and retract the airfoil sails, which has a high degree of automation and reduces deck occupancy, improving wind energy utilization and thrust effect

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