A new type of propeller deflector

Abstract

The invention belongs to a novel propeller diversion device, which comprises a hull and a propeller. There is a diversion pipe on the upper side of the propeller. The upper end surface of the flow tube is a horizontal plane, the lower end surface and the left and right sides of the draft tube have an inclination angle, and the streamlines of the inner walls of the lower end surface and the left and right sides start from the front end surface and gradually reach the highest point, and then gradually go down to the rear. When the streamline of the inner wall of the end face and the lower end face reaches the rear end face, the curvature of the streamline is 0, and the curvature of the highest point of the streamline of the inner wall of the left and right sides gradually decreases to 0 from the lower end face to the upper end face; The size and shape of the flow tube, and installed in front of the propeller, can make the propeller inflow more uniform, reduce the resistance of the guide tube, increase the additional thrust and reduce the separation of the water body at the tail of the hull; improve the efficiency of the propeller and have a structural Simple and firm, with the advantages of energy saving and drag reduction.

Description

technical field [0001] The invention belongs to the technical field of ships, and in particular relates to a novel propeller deflector. Background technique [0002] At this stage, with the development of the new normal economy, the shipping industry is developing rapidly, but the energy consumption of the traditional shipping industry is huge, and this high energy consumption makes the cost of shipping transportation remain high. Therefore, the development of ship energy-saving technology has attracted much attention, and it is an effective method to install a guide tube for the propeller that provides thrust to the ship to achieve the purpose of saving energy and reducing consumption. The traditional guide tube is installed directly in front of the propeller, which increases the turning radius of the ship, and deteriorates the turning performance and low-speed rudder effect of the ship. The diameter is slightly larger than the diameter of the propeller, so that underwater...

AI Technical Summary

Problems solved by technology

The diameter is slightly larger than the diameter of the propeller, so that underwater aquatic plants and other debris are easy to get stuck in the tube, and if there is a hard object colliding and deforming, the blade tip will collide with the inner wall of the tube, which will affect the normal navigation of the ship

The side section of the pipe is similar to a platform shape, which makes the incoming flow unstable, the energy saving efficiency is not high, and the ship's navigation resistance is relatively large.

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