Method for manufacturing watercraft commutation tube

Abstract

The invention relates to a manufacture method of a ship rectification duct, which comprises the following steps: (1) manufacturing a bow fetal board and processing a first breach and manufacturing a bow fetal board and processing a second breach which is located as a shaped grid; (2) arranging the base level of the shaped grid and fixing the lowest point and ensuring the level; (3) assembling an outside casing plate and rolling a semi-circled table for the outside casing plate; (4) providing the outside casing plates on the internal frames of the first breach and the second breach; (5) rulingin the outside casing plate and installing a knee plate distributed horizontally and vertically; (6) installing an inner casing composition plate on the knee plate and welding the composition plate into inner casing plate and completing the manufacture of the rectification duct after checking and adjusting. The manufacture method of the rectification duct of the invention can easily control the deformation of the whole manufacture method of the rectification duct, ensures the accuracy of inner and outer linearity of the rectification duct, improves the production efficiency, saves time and speeds up the construction of the whole ship.

Description

technical field [0001] The invention relates to ship construction, in particular to a method for manufacturing a ship rectifying duct. Background technique [0002] The fairing duct is an important energy-saving component on the ship, which can improve the water flow at the propeller during the propulsion process of the ship, so as to reduce energy consumption and increase thrust. [0003] The fairing duct is composed of a set of circular frustum-shaped double shells, which are installed at the stern of the ship, located at the outlet of the propeller, with one on each side, such as figure 1 shown, figure 1 It is a schematic diagram of the installation position of the rectifier conduit. [0004] The main function of the rectifier duct is to improve the water flow state, and it is an important ship propulsion energy-saving device. please see figure 2 ,Yes figure 1 E-E sectional view of the middle rectifying duct. It can be seen from the figure that the rectifying duct ...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned prior art, because the tire frame used is not a solid body, the deformation during linear laying, positioning and welding is difficult to control

In the prior art, the inner shell is used as the base surface to manufacture rectifying ducts, and there are still disadvantages such as difficulty in laying tire frames, low precision, long manufacturing hours, and high cost.

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