Device and method for reducing noise of marine propeller through pulse laser etching

Abstract

The invention relates to a device and method for reducing noise of a marine propeller through pulse laser etching, the device comprises a mechanical arm, a laser head used for emitting laser and a rotating device, the rotating device is arranged on an external carrier below the mechanical arm and can rotate in the circumferential direction, and the propeller to be machined is arranged on the rotating device. And the laser head is arranged at the tail end of the mechanical arm and can rotate in the circumferential direction along with the rotating device, the laser head is rotationally arranged at the tail end of the mechanical arm, and laser emitted by the laser head can irradiate the surfaces of blades of the propeller below the laser head. The mechanical arm drives the laser head to move so that laser emitted by the laser head can machine the surface of the propeller blade of the propeller, modification treatment on the surface of the propeller blade of the propeller can be rapidly and efficiently completed, and a composite microstructure is formed on the surface of the propeller blade of the propeller; and the noise generated when the propeller works in fresh water and seawater is reduced, the structure is simple, the machining speed is high, and environmental protection and no pollution are achieved.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a device and method for reducing noise of marine propellers by utilizing pulsed laser etching. Background technique [0002] Propeller noise is one of the three main noises of ship noise. The propeller is accompanied by noise when it moves, and its components can be divided into flow noise and noise induced by mechanical vibration. With the continuous development of science and technology, the precision of machining has been greatly improved, and the assembly precision between the propeller, the shaft and the main engine has also reached a certain height, which greatly reduces the vibration and noise accompanying the mechanical transmission. Therefore, flow noise naturally becomes the main sound source of current propeller noise. With the continuous development of heavy-duty and high-speed ships and underwater vehicles, the problems of marine noise pollution caused by u...

AI Technical Summary

Problems solved by technology

Although the adhesion-release antifouling coating shows excellent anti-bioadhesion effect, the influence of the coating itself on the propeller efficiency remains to be clarified

At the same time, with the attachment of marine organisms, the coating will be detached layer by layer, reducing the protective effect, and the durability cannot be guaranteed. The detached coating will still affect the marine environment.

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