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Manufacturing method of air-permeable metal shell body structure for reducing resistance of fluid to moving object and application

A technology of moving objects and gas-permeable metals, applied in the field of reducing fluid resistance, can solve the problems of difficult processing of porous silicon material plates, inability of the bottom of the ship, and obstacles to practical applications, etc., to achieve improved safety and reliability, shortened travel time, and easy pore size The effect of control

Inactive Publication Date: 2018-11-02
周照耀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of porous silicon material plates to generate microbubbles, porous silicon material plates are difficult to process, and the bottom of the ship can only be made into a flat plate shape, and the bottom of the ship cannot be integrally manufactured into a breathable structure, which hinders the practical application of this technology

Method used

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  • Manufacturing method of air-permeable metal shell body structure for reducing resistance of fluid to moving object and application
  • Manufacturing method of air-permeable metal shell body structure for reducing resistance of fluid to moving object and application
  • Manufacturing method of air-permeable metal shell body structure for reducing resistance of fluid to moving object and application

Examples

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Effect test

Embodiment 1

[0030] The technical solution provided by the present invention is: a method for manufacturing a breathable metal shell structure that reduces the resistance of fluid to moving objects. First, weave metal fiber filaments to form a braided body slab, then sinter, and then press the fiber through plastic processing. Silk sintered slab, compressing the pore size of the fiber sintered blank, reducing the porosity of the material, improving the mechanical properties of the material, while maintaining the connectivity of the material pores, obtaining a breathable fiber metal plate; and then manufacturing the breathable metal plate through plastic pressure processing The shape and size of the shell of the moving object are obtained to obtain a breathable shell structure, so that one side of the multi-microporous breathable metal plate material forms the outer surface of the moving object shell, and the other side forms the inner surface of the moving object shell, and constitutes a clo...

Embodiment 2

[0033] The difference from Example 1 is that the present example adopts 200 20 steel wires with a diameter of 50 microns as a bunch, and the braiding machine carries out multi-bundle braiding, braiding a braided board body with a length of 2000 millimeters, a width of 300 millimeters and a thickness of 10 millimeters, and then Sinter at a temperature of 1250 degrees Celsius for 2 hours to achieve metallurgical bonding between the wires to obtain a sintered slab body, and then place the sintered woven sheet material body between the rolls of a plate rolling machine at room temperature for rolling processing to compress the fibers The pore size of the sintered billet reduces the porosity of the material, improves the mechanical properties of the material, and at the same time maintains the connectivity of the material pores to obtain a 5 mm thick breathable fiber metal plate, and then process the breathable fiber metal plate into the shell shape of the moving object and size.

Embodiment 3

[0035] The difference from Example 1 is that in this embodiment, a layer of stainless steel powder is uniformly distributed on the fiber filament sintered slab, the stainless steel powder is 100 microns, and then the stainless steel powder is rolled on the fiber filament sintered slab, and then the stainless steel is sintered The powder layer combines the stainless steel powder on the fiber filament sintered base plate and keeps the pores between the powder particles connected to obtain a breathable metal plate whose pore size is distributed along the thickness step change. The pore size change distribution of the multi-microporous breathable material is step change. The largest pore size on the fiber surface is 100 microns, the smallest pore size on the powder surface is 5 microns, the thickness of the air-permeable fiber layer is 5 mm, and the thickness of the air-permeable powder layer is 0.5 mm.

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Abstract

The invention discloses a manufacturing method of an air-permeable metal shell body structure for reducing the resistance of a fluid to a moving object. Firstly, metal fiber yarns are weaved to form awoven body plate blank; then sintering is carried out; and then a fiber wire sintering plate blank is pressed through plastic machining, pore sizes of the compressed fiber wire sintering plate blankis reduced, and the porosity of a material is reduced, the mechanical property of the material is improved, and meanwhile, the pore connection of the material is kept so as to obtain an air-permeablefiber metal plate; and then the air-permeable fiber metal plate is manufactured into a shell shape and size of the moving object through a plastic pressure machining method, an air-permeable outer shell structure is obtained, so that one face of the multi-microporous air-permeable metal plate material forms the outer surface of the shell of the moving object, the other face of the multi-microporous air-permeable metal plate material forms the inner face of the shell of the moving object, and a closed space is formed; a gas source outputs pressure gas enters the closed space, the gas penetratesfrom one face of a multi-microporous air-permeable metal shell body through the multi-microporous air-permeable metal shell body material to achieve the other face of the multi-microporous air-permeable metal shell body; and meanwhile, the structure shape of the shell of the moving object can be kept by an air-permeable metal material, and the structural strength requirement can be met.

Description

technical field [0001] The invention relates to the technical field of reducing fluid resistance, in particular to a manufacturing method and application of a gas-permeable metal shell structure that reduces fluid resistance to high-speed moving objects. Background technique [0002] The drag reduction technology of the air layer on the surface of the hull (that is, the air curtain) can significantly reduce the resistance of the ship, reduce fuel consumption, and increase the speed of the ship, which has important economic and environmental values. The basic principle of this technology is to inject air or main engine exhaust gas between the outer surface of the hull and the water to form a thin layer of uniform and stable gas-liquid two-phase flow, and use the difference in density and viscosity between water and air to change the surface flow of the hull The viscosity, density and turbulent flow mode of the field can reduce the actual wetted area of ​​the ship, thereby red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02
CPCB21C37/02B22F5/10B22F7/04
Inventor 周照耀
Owner 周照耀
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