Laval and hartmann structure integrated type supersonic-speed atomizing nozzle

An atomization nozzle, supersonic technology, applied in the field of supersonic atomization nozzle, can solve the problems such as no nozzle, achieve high atomization efficiency, fine atomization particles, narrow particle size distribution effect

Active Publication Date: 2015-02-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the domestic and foreign research reports tha

Method used

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  • Laval and hartmann structure integrated type supersonic-speed atomizing nozzle
  • Laval and hartmann structure integrated type supersonic-speed atomizing nozzle
  • Laval and hartmann structure integrated type supersonic-speed atomizing nozzle

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Embodiment 1

[0029] A supersonic atomizing nozzle that combines laval and hartmann structures, such as figure 1 As shown, it includes a liquid guiding chamber 1, a nozzle opening 2 is provided below the liquid guiding chamber 1, an annular high-pressure air inlet chamber 3 is surrounded around the liquid guiding chamber 1, and an air inlet channel is opened on the inner wall of the high-pressure air inlet chamber 3 4. The high-pressure intake chamber 3 communicates with the nozzle opening 2 through the intake passage 4, and the number of the intake passage 4 is greater than 18.

[0030] refer to figure 1 , figure 2 , the intake channel 4 is a crossed Hartmann two-stage resonance tube structure formed by connecting the inlet conduit 5, the outlet conduit 6, the primary resonance tube 7 and the secondary resonance tube 8, wherein the inlet conduit 5 and the primary resonance tube 7 are located On the same straight line, the outlet conduit 6 and the secondary resonance tube 8 are located o...

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PUM

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Abstract

The invention relates to a laval and hartmann structure integrated type supersonic-speed atomizing nozzle. The nozzle comprises a drainage cavity, wherein a nozzle hole is formed in the lower side of the drainage cavity, an annular high-pressure air inlet cavity surrounds the drainage cavity, an air inlet channel is formed in the inner wall of the high-pressure air inlet cavity which is communicated with the nozzle hole through the air inlet channel, the air inlet channel is of a cross-shaped hartmann two-stage resonating tube structure which is formed after an inlet conduit, an outlet conduit, a primary resonating tube and a secondary resonating tube are communicated, the inlet conduit and the primary resonating tube are located on the same straight line, the outlet conduit and the secondary resonating tube are located on the same straight line, the tail end of the primary resonating tube and the tail end of the secondary resonating tube are closed, the inlet conduit is a reducing channel which has the features of a laval tube, and the outlet conduit is a reducing channel which has the features of a compression tube. Compared with the prior art, the nozzle has the advantages that due to the fact that a laval tube and a cross-shaped hartmann resonating tube are integrated to form the air inlet channel which is of an annular ring structure, nozzle atomization efficiency can be improved remarkably, the diameter of an atomization particle can be reduced, and particle size distribution can be narrowed.

Description

technical field [0001] The invention relates to an atomizing nozzle, in particular to a supersonic atomizing nozzle combining laval and hartmann structures. Background technique [0002] At present, with the development of modern powder metallurgy technology and high-performance powder metallurgy materials, as well as the development of advanced preparation technologies such as ball grid array packaging, metal injection molding, thermal spraying, and metal rapid prototyping 3D printing, more stringent requirements have been put forward for metal powders. Requirements, such as powder particle size and uniformity, fluidity and so on. Now, most of the powder market and technology applicable to these advanced preparation technologies are monopolized by foreign powder product companies, such as titanium alloy powder, aluminum alloy powder, magnesium alloy powder, stainless steel powder, etc., and their price is as high as that of conventional powder Metallurgy requires more than...

Claims

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Application Information

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IPC IPC(8): B22F9/08
Inventor 严彪严鹏飞
Owner TONGJI UNIV
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