Small-size LNG transport ship tail structure propelled by double full-circle-swinging rotary pull type propellers

Abstract

The invention relates to a small-size LNG transport ship tail structure propelled by double full-circle-swinging rotary pull type propellers. The line style of the tail structure is a longitudinal flow type tail line style; an integrated water diversion heel is arranged at the stern, the pull type propellers are fixedly arranged at the two sides of the integrated water diversion heel respectively, and the pull type propellers are controlled in a 360-degree full-circle-swinging mode in a horizontal plane; the tail line style is of a horizontal line style structure at the mounting positions of the pull type propellers; the pull type propellers are mounted in a mode of extending outward by 2 degrees in the horizontal direction and extending downward by 1 degree in the longitudinal direction. By means of the small-size LNG transport ship tail structure, maneuverability of a ship is greatly improved, excellent maneuverability can be achieved even at the zero navigational speed, independence of a towboat can be achieved in the aspect of maneuverability when the ship enters and leaves a port, and work of getting close to or leaving the port is completed independently; compared with conventional push type full-circle-swinging propellers, the pull type propellers are higher in propelling efficiency, thereby the disadvantage that a double-propeller ship is inferior to a single-propeller ship in propelling efficiency is well made up, high propelling efficiency is still maintained when the ship navigates on the sea, and economical efficiency is improved.

Description

technical field [0001] The invention relates to a tail structure propelled by double full-turn pull-type oars of a small LNG carrier, and belongs to the technical field of small LNG carriers. Background technique [0002] Small LNG carriers are usually used for secondary transshipment between large LNG receiving terminals and small and medium-sized LNG receiving terminals. This type of transshipment is characterized by shorter voyages and shorter sea voyages; compared with large LNG carriers, they enter and leave ports more frequently , so the maneuverability of a small LNG ship has a crucial impact on its work efficiency. One of the most important factors affecting the operational performance is the propulsion mode of the small LNG carrier. The tail line shape and the propulsion mode match each other, and a specific propulsion mode must have a specific tail line shape to match it. [0003] The main propulsion method of existing small LNG ships is single propeller shafting ...

AI Technical Summary

Problems solved by technology

This not only increases the cost of the tugboat, but also affects the efficiency of entering and leaving the port, resulting in an increase in cost and a decline in economy

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