Microbubble Noise Reduction Applicable to Ducted Propellers

A technology of micro-bubbles and ducted propellers, which is applied in transportation and packaging, ship propulsion, ship parts, etc., can solve the adverse effects of marine organisms, sound pollution of ships, etc., and achieve the goal of improving concealment, protecting the living environment, and reducing noise Effect

Active Publication Date: 2018-08-17
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Sound pollution from ships, especially from propellers, can have serious adverse effects on the survival of marine life

Method used

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  • Microbubble Noise Reduction Applicable to Ducted Propellers
  • Microbubble Noise Reduction Applicable to Ducted Propellers
  • Microbubble Noise Reduction Applicable to Ducted Propellers

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] combine Figure 1 to Figure 5 , the present invention is a microbubble noise reduction device suitable for ducted propellers, mainly including ducted propellers, air supply pipelines and air compressors, wherein the ducted propellers include a propeller 1, a duct 2 and a duct support 3, and the trailing edge of the duct has two The small holes 4 with dense rings can generate a large number of microbubbles, thereby forming a gas-liquid mixture with a certain thickness. The gas supply pipeline includes the gas charging port 5, the gas supply pipeline 6, the pressure gauge 7 and two jet semi-rings 8, and the air pressure Machine comprises main parts such as adjustable high-pressure valve 9 and air storage tank 10. The air pipeline has two branches, and the air is input from the upper and lower ends of the two air jet half-rings o...

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Abstract

The invention provides a micro-bubble noise reduction device applicable to ducted propellers. The micro-bubble noise reduction device comprises the propellers, a duct and a duct support. Two air jetting semi-rings are oppositely arranged on the tail edge of the duct; two circles of small holes are formed in the end face of the tail edge of the duct in a staggered mode at same intervals along the circumferential direction of the duct. The air jetting semi-rings communicate with the two circles of small holes. The two air jetting semi-rings are connected with an air supply pipeline in the duct support through a pipeline simultaneously, and the end of the air supply pipeline is sequentially connected to an adjustable high-pressure valve and an air storage tank. A pressure gauge is further arranged on the air supply pipeline. The micro-bubble noise reduction device is applicable to noise reduction behind the propellers of a ship with the ducted propellers and a pump-jetting thruster.

Description

technical field [0001] The invention relates to a noise reduction device, in particular to a microbubble noise reduction device suitable for ducted paddles. Background technique [0002] Many creatures in the ocean, from whales to invertebrates, use sound for various activities such as communicating, foraging, avoiding predators and migrating. Sound pollution from ships, especially from propellers, can have serious adverse effects on the survival of marine life. For warships, reducing the noise of the ship itself can greatly reduce the hit probability of the enemy ship's sound-guided torpedo. Therefore, reducing the underwater radiation noise of ships has been highly valued by navies of various countries. Considering the current problems that need to be solved, the design scheme of the microbubble noise reduction device suitable for ducted propellers is proposed. Contents of the invention [0003] The purpose of the present invention is to provide a microbubble noise re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63H5/14
CPCB63H5/14
Inventor 龚杰郭春雨林健峰吴铁成曹绪祥宋科委魏少鹏
Owner HARBIN ENG UNIV
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