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A method for installing energy-saving fins on ships

An installation method and fin technology, which are applied in ship construction, ship parts, transportation and packaging, etc., can solve the problems of low installation accuracy, long installation period of energy-saving fins, and poor ship energy-saving effect, so as to shorten the construction period and improve the Installation accuracy, the effect of ensuring installation accuracy

Active Publication Date: 2018-09-21
HUDONG ZHONGHUA SHIPBUILDINGGROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of long installation period and low installation accuracy of energy-saving fins in the prior art, which affect the ship's construction period and poor energy-saving effect during ship operation, the present invention proposes an innovative energy-saving fin installation method

Method used

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  • A method for installing energy-saving fins on ships
  • A method for installing energy-saving fins on ships
  • A method for installing energy-saving fins on ships

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Embodiment Construction

[0030] Below we will further elaborate on the installation method of the energy-saving fins of the present invention in combination with the accompanying drawings and specific examples, in order to understand its operation flow and implementation process more clearly, but this cannot limit the protection scope of the patent of the present invention .

[0031] as attached figure 1 As shown, the energy-saving fin is a pre-vortex device composed of 5 fins, which are respectively recorded as P1, P2, S3, S2, and S1. The 5 fins not only have angles in the circumferential direction, but each The axis angles also vary.

[0032] In an embodiment, the method of the present invention mainly includes the following detailed steps:

[0033] The first step is the actual measurement of the outline of the outer plate of the stern hub: as attached figure 2 As shown, draw a 45° line according to the theoretical line shape characteristics of the outer plate of the stern hub, draw a longitudin...

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Abstract

The invention discloses an installation method for an energy-saving fin keel of a ship. The installation method comprises following steps: actually measuring the contour line of an outer plate of a stern tube shaft in an installation region of an energy-saving fin, utilizing the actually measured line shape and an installation angle of the fin keel to find a primary installation position line of the fin keel on the stern contour of a tube shaft, utilizing the line shape to cut off the remaining amount of the fin keel in advance, compiling control program of deviation of the fin plate, correlating three-dimensional coordinates of a fin keel point measured by a total-station instrument to the positioning deviation of the fin keel for real-time tracking and positional guiding of the fin keel, reinforcing the fin keel prior to welding and formulating reasonable program of welding process, utilizing positioning deviation of the fin plate to control program so that welding influence upon installation of the fin keel is adjusted within the controllable range. The installation method for the energy-saving fin keel of the ship is capable of shortening time spent on positioning and installing the energy-saving fin keel in the dock phase and effectively reducing period of newly constructing a dock of the ship and dock-repair period of repairing the ship so that construction or cost of the ship or dock repair can be effectively saved.

Description

technical field [0001] The invention relates to an installation method of energy-saving fins, in particular to an installation method of energy-saving fins for large VLCCs (large oil tankers), VLOCs (large ore carriers) and bulk carriers with high square coefficients. Background technique [0002] In response to the energy crisis, all shipbuilding countries have set off a wave of technology to develop and apply ship hydrodynamic energy-saving devices. The working principle of the energy-saving fin is that through the interference of the fin blades on the energy-saving fin on the accompanying flow field of the propeller, the direction of the water flow that originally revolves around the propeller hub changes with the propeller, so that the hub vortex of the propeller disappears and the induced resistance caused by the hub vortex is eliminated. , has a rectifying effect on the propeller, causing the wake rotation speed to decrease and the axial acceleration behind the propell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B9/06
Inventor 罗金王伟潘洪波
Owner HUDONG ZHONGHUA SHIPBUILDINGGROUP
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