Ship propeller

Abstract

A ship propeller is provided with a paddle wheel and nozzles which are integrated by the aid of a fairing and is mounted below the ship waterline. The ship propeller comprises a short shaft or long shaft, a telescopic shaft, the fairing, split bearing blocks, a fixed nozzle, a movable nozzle, clutches and a driving mechanism. The fairing is mounted on the upper half side of the paddle wheel, slotted holes are uniformly distributed on the circumference of the paddle wheel, and the nozzles are mounted on the paddle wheel. After entering the nozzles through the slotted holes on the fairing to turn around, a driven flow is jet from the opposite running direction of the ship to form a thrust; propelling power of the ship jets water directly padded by the lower half side of the paddle wheel and the flow driven by the upper half side of the paddle wheel. Principle and structure of the ship propeller are feasible according to test of a prototype model. The ship propeller has the advantages that the paddle wheel having simple shape and structure is easy to manufacture and maintain and low in cost, the thrust is free of fluctuation thereby resulting in high efficiency, requirements for draft of water are low, and backing of the ship is easy to realize by the aid of the ship propeller.

Description

technical field [0001] A ship propeller belongs to the technical field of direct action on water and water jet reaction propulsion. Background technique [0002] Existing ship propellers are divided into paddle wheels, propellers, straight wings (horizontal rotation), water jets, half-rotating blades and bionic propellers. [0003] The paddle wheel propeller originated from the early steam-powered ships. It is a propeller installed on both sides or stern of the ship and only the lower half of the water enters the water; it is usually distinguished according to whether the fins mounted on the paddle wheel rotate. It is a fixed fin paddle wheel and a movable fin paddle wheel; the reaction force generated by its stroke pushes the ship forward. Some water entertainment tools, such as water bicycles, also use a simple and effective propulsion method similar to the paddle wheels with fixed fins. Since the paddle wheels of paddle steamers are mostly installed on the side and most...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the water inlet pipe loses the effective volume in the ship; and in order to improve the water spray efficiency, most of the impellers (including the impeller of the water pump) have complex geometric shapes

Its disadvantage is that the kinematic mechanism of the blade is more complicated, and the propulsion generated is pulsating and will not be very large.

[0008] However, the literature search shows that in the process of the evolution of the paddle wheel propeller to the "dark" type propeller, people seem to have not explored how to make the fixed fin paddle wheel with a simple structure fully immersed in water (that is, fully immersed) to produce propulsion effect ; perhaps still following the design idea of ​​early paddle steamers, it is simply believed that when the paddle wheel rotates, the direction of motion of the symmetrical fins is opposite, and the thrust generated by the two paddles will cancel each other after full immersion; therefore, the paddle wheel as a propeller only Can be half-immersed or less-half-immersed

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