A Noise Reducing Marine Propeller

Abstract

The invention discloses a noise-reducing impeller for a ship. The noise-reducing impeller for the ship comprises a housing fixed to the outer side of a ship body, a driving motor is fixed to the innerside of the ship body, and a rotary shaft is connected to the driving end of the driving motor; the end, far from the driving motor, of the rotary shaft penetrates through the ship body and extends into the housing; the housing is divided, from the ship body to the exterior, into a suction section, a flat section, a reefed section and an ejection section; multiple suction openings are formed in the side wall of the suction section in an encircling mode, and the rotary shaft is fixedly sleeved with a first impeller located in the water outlet end of the suction section; a protrusion is arranged at the upper side of the flat section and provided with multiple air discharge holes, and the aperture of the water inlet end of the reefed section is bigger than that of the water outlet end of thereefed section. In the noise-reducing impeller for the ship, the water flow speed is reduced through the arrangement of the flat section, accordingly it is convenient for bubbles in water to have enough time to ascend into the protrusion and are discharged through the air discharge holes, the contact between air and the inner side wall of the housing is reduced, and the noise is reduced.

Description

technical field [0001] The invention relates to the technical field of thrusters, in particular to a noise-reducing marine thruster. Background technique [0002] The marine thruster is the forward power mechanism of the ship, and it is an energy converter that converts natural force, manpower or mechanical energy into the thrust of the ship. [0003] Propellers can be divided into active and reactive types according to their mode of action. Fibers, sails (see sailboats), etc. that are driven forward by manpower or wind are active, while oars, sculls, paddle wheels, water jets, propellers, etc. are reactive. Most modern transport ships use reactive propellers, and propellers are the most widely used. [0004] In the process of using the screw propeller of the existing ship, the water flows to the rear of the ship by stirring the water to generate a reaction force, so that the ship obtains forward power, and in this process, the air in the water flow will Contact with the ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem in the prior art that the air in the water flow will be in contact with the inner side wall of the propeller, which will generate relatively loud noise and affect the riding experience of the crew and passengers, and proposes a marine propeller with reduced noise

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