Low-vibration high-efficiency energy-saving device in front of double-guide-pipe propeller

Abstract

The invention provides a low-vibration efficient energy-saving device in front of a double-guide-pipe propeller. The low-vibration efficient energy-saving device in front of the double-guide-pipe propeller comprises two first radial guide blades, a first arc guide pipe, a second arc guide pipe and a plurality of second radial guide blades. The first radial guide blades are distributed in a radialdirection of a stern shaft, and first ends of the first radial guide blades are fixed to a periphery of the stern shaft. The second radial guide blades are distributed in the radial direction of the stern shaft and located between the two first radial guide blades, and the second radial guide blades are connected with the periphery of the stern shaft or connected with the first radial guide bladesthrough the first arc guide pipe and / or the second arc guide pipe; and the first arc guide pipe and the second arc guide pipe are connected with the first radial guide blades and the second radial guide blades or connected with the at least two second radial guide blades respectively. According to the low-vibration efficient energy-saving device in front of the double-guide-pipe propeller, a hydrodynamic characteristic of a ship tail accompanying flow field can be fully utilized, an energy-saving effect is improved, structural reliability is greatly improved, and risks of structural damage and resonance are reduced.

Description

technical field [0001] The invention relates to the field of energy-saving devices in front of propellers, in particular to a low-vibration and high-efficiency dual-duct energy-saving device in front of propellers. Background technique [0002] In the current shipping industry, ship owners have increasingly strict requirements on fuel consumption, and ship emissions are becoming more and more low-carbon and environmentally friendly. More and more new and rebuilt ships are equipped with pre-rotation energy-saving ducts before propellers. At present, the pre-swirl energy-saving ducts in front of the propeller mainly include the form of several pre-swirl guide vanes and the combination of several pre-swirl guide vanes and a fan-shaped duct. Energy-saving effect, and at present, with the emergence of large-diameter propellers, the length of guide vanes is too long, and there are structural strength safety issues. At the same time, the vibration performance of energy-saving devic...

AI Technical Summary

Problems solved by technology

Relatively speaking, the combination of a fan-shaped duct and guide vanes has greatly improved the above aspects, but now more and more large-diameter propellers are used on large ships, and the length of the guide vanes is also increased, resulting in guide vanes More and more slender, there is still a high risk of structural damage and resonance

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