Sleeve screw propeller thrustor

Abstract

A propeller with sleeve barrel for ship features that the propeller is arranged in a sleeve barrel whose diameter is consistent with that of propeller, said sleeve barrel is fixed to the ship tail under ship body, and a protecting net is arranged between sleeve barrel and ship bottom. The rotating propeller can generate a cylindrical water stream for increasing speed of ship. Said protecting net can prevent the propeller from being wound by other material.

Description

(1) Technical field [0001] The invention relates to the field of various ships on water, in particular to a sleeve propeller propeller for ships. (2) Background technology [0002] At present, all ship propellers are installed under the stern of the hull nakedly. Its working principle is: using the rotation of the inclined blades on the propeller to push the water to the rear, the reverse thrust of the water will push the hull push forward. At this time, the faster the propeller rotates, the greater the reverse thrust of the water it produces, and the faster the hull travels. But propeller also has the phenomenon of wasting power to exist when propeller does work, and existing propeller all is made up of three inclined-plane blades, and when they rotate in water, is to push water into the expansion parallel water column of a garden cone, will The water pushes quickly and parallel to the rear. At this time, the parallel water column of the cone flowing q...

AI Technical Summary

Problems solved by technology

But propeller also has the phenomenon of wasting power to exist when propeller does work, and existing propeller all is made up of three inclined-plane blades, and when they rotate in water, is to push water into the expansion parallel water column of a garden cone, will The water pushes quickly and parallel to the rear. At this time, the parallel water column of the cone flowing quickly in the water is blocked by the water section relative to it, so that it cannot quickly open a water channel, and at the same time relatively give this parallel fast water column. The strong reverse thrust of the bottom surface of the flowing cone makes this force feedback to the entire section of the rotating propeller, forcing the propeller to retreat, and the propeller is fixed under the stern of the hull , so the propeller drives the hull to move forward

From here we can easily see that through the rotation of the propeller, after the water is turned into a cone and pushed out, the water surface relative to the bottom section of the cone is like a "water wall". , that is, according to the equal area of ​​the bottom section of this garden cone, it is given the same reverse thrust force (comprising the consumption of water flow), and at this time, the reverse thrust force of the bottom section of this garden cone can really be Feedback on the propeller section also only has the central part of the bottom section of this garden cone, and the reverse thrust force around the other side has all done invalid power and wasted. Therefore, it is said that the existing propeller has wasted power. phenomenon exists! As the current propeller is installed under the hull stern, when the hull is running, it is often damaged by obstacles and entangled by some fish, algae, and flowing sundries, making it impossible to rotate or reduce the thrust Therefore, it is necessary to frequently send people to dive for maintenance or cleaning, which brings a lot of trouble to people

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