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Frictional resistance reducing device for air-lubricated ships, ships

A technology of friction resistance and air, applied in the direction of hull, ship construction, hull design, etc., can solve the problems of smaller energy saving effect, larger energy consumption, and inability to fully obtain air ejection pressure, so as to achieve reduction effect and improve energy saving effect of effect

Inactive Publication Date: 2019-09-20
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the discharge pressure of the air may not be sufficiently obtained by the blower
For example, a method of using a high-pressure air source such as a compressor that can boost the pressure to a higher pressure is also considered, but the energy consumption becomes larger
Therefore, when the draft is deep, the difference between the energy consumption reduced by reducing the frictional resistance and the energy consumption required for feeding air becomes smaller, and the energy-saving effect becomes smaller.

Method used

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  • Frictional resistance reducing device for air-lubricated ships, ships
  • Frictional resistance reducing device for air-lubricated ships, ships
  • Frictional resistance reducing device for air-lubricated ships, ships

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Effect test

no. 1 approach

[0056] figure 1 It is a schematic diagram which shows the frictional resistance reduction apparatus of the air lubrication type ship of this embodiment, and the whole structure of a ship.

[0057] Such as figure 1 As shown, the ship (air lubricated ship) 10 of this embodiment mainly includes a hull 11, a propeller 12, a main engine 13, a supercharger 14, and a frictional resistance reducing device 20A.

[0058] The propeller 12 protrudes rearward from the bottom of the stern part 11r side of the ship body 11. As shown in FIG. This propeller 12 is provided with the rotating shaft 12s, and this rotating shaft 12s is connected to the main engine 13 provided in the hull 11. As shown in FIG.

[0059] The main engine 13 generates driving force by burning a mixer that mixes fuel and air, and drives the rotating shaft 12s of the propeller 12 to rotate.

[0060] The supercharger 14 takes in atmospheric air from the outside, compresses it, and sends at least a part of it to the main ...

no. 2 approach

[0078] Next, a frictional resistance reducing device and a ship of an air-lubricated ship according to a second embodiment of the present invention will be described based on the drawings. In the second embodiment described below, only the structure including the air supply unit is different from the first embodiment. Therefore, the same reference numerals will be assigned to the same parts as those in the first embodiment, and repeated description will be omitted.

[0079] figure 2 It is a schematic diagram which shows the frictional resistance reduction apparatus of the air lubrication type ship of this embodiment, and the whole structure of a ship.

[0080] Such as figure 2 As shown, the ship 10 of the present embodiment includes a frictional resistance reducing device 20B. The frictional resistance reducing device 20B includes a bubble ejection unit 21 , an air supply unit 30A, and a low-pressure air supply unit (air booster unit) 40 .

[0081] The low-pressure air s...

no. 3 approach

[0098] Next, a frictional resistance reducing device and a ship of an air-lubricated ship according to a third embodiment of the present invention will be described based on the drawings. In this third embodiment, the same parts as those in the first embodiment and the second embodiment will be described with the same reference numerals, and repeated description will be omitted.

[0099] image 3 It is a schematic diagram which shows the frictional resistance reduction apparatus of the air lubrication type ship of this embodiment, and the whole structure of a ship.

[0100] Such as image 3 As shown, the ship 10 of the present embodiment includes a frictional resistance reducing device 20C. This frictional resistance reducing device 20C includes a bubble ejection unit 21 , an air supply unit 30C, and a low-pressure air supply unit 40 .

[0101] The air supply unit 30C includes an injector body 31 . A suction port 32 is connected to the outer peripheral side of the injector...

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PUM

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Abstract

The frictional resistance reducing device (20E) of the air lubricated type ship (10) that sprays air around the hull (11) to reduce the frictional resistance generated between the hull (11) and the surrounding water has: the injector main body ( 31) has a flow path (31r) for the flow of high-pressure air (AH) supplied from a high-pressure air supply source (14), and introduces low-pressure air (AL ); and the bubble ejection unit (21), which generates air bubbles around the hull (11) by ejecting high-pressure air (AH) and low-pressure air (AL) discharged from the injector body (31).

Description

technical field [0001] The present invention relates to a frictional resistance reducing device and a ship of an air-lubricated ship. [0002] This application claims priority based on Japanese Patent Application No. 2015-73479 for which it applied to Japan on March 31, 2015, and uses the content here. Background technique [0003] When a ship is sailing, it will be subjected to frictional resistance generated between the submerged part of the ship's hull and the water. This frictional resistance becomes a loss to the propulsive force of the hull, so it hinders the improvement of the energy-saving effect by reducing fuel consumption, the improvement of CO 2 Emission reduction. [0004] Therefore, a technique has been proposed in which air bubbles generated by jetting air from the hull into the surrounding water flow along the surface of the hull to reduce frictional resistance with water. [0005] Air bubbles can be generated, for example, by blowers. This blower is adva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B1/38B63H21/14B63J3/00
CPCB63B1/38B63H21/14B63J3/00Y02T70/10B63B2001/387B63H1/14
Inventor 高野真一川北千春村田聪佐藤慎辅
Owner MITSUBISHI HEAVY IND LTD
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