Cross foldable automatic retracting and spreading wing type sail

Abstract

The invention discloses a cross foldable automatic retracting and spreading wing type sail. A first fixed pulley is fixed at the upper end of a multi-section main mast, a second fixed pulley is fixed at the right end of a top frame cross rod, and a third fixed pulley is fixed at the right end of a bottom frame cross rod. The left ends of an upper spring telescopic rod and a lower spring telescopic rod are fixedly connected with one corresponding frame cross rod respectively, and the right ends are fixedly connected with one corresponding sliding block in snap grooves respectively. A first sail body fixing mast is arranged close to the right of the multi-section main mast, the upper end of a second sail body fixing mast is fixedly connected with a first sliding block at the top, and the lower end of the second sail body fixing mast is fixedly connected with a second sliding block at the bottom. One end of a first pulling cable is fixedly connected with the lower end of the inside of a base, and the other end is fixedly connected with the first sliding block. One end of a second pulling cable is fixedly connected with the upper end of the inside of the multi-section main mast, and the other end is fixedly connected with the second sliding block. By means of the sail, the sail is driven to be spread and retracted automatically by using hydraulic lifting rods as power, and accordingly, the wind energy utilization rate is 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 a...

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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