Post-mixing type abrasive water jet nozzle based on annular jet

Abstract

The invention discloses a post-mixing type abrasive water jet nozzle based on annular jet. The post-mixing type abrasive water jet nozzle comprises an annular nozzle and a secondary annular nozzle which are successively arranged from front to back, wherein a straight pipe section used for sucking abrasive is arranged at the inlet of the annular nozzle; a high-pressure water jet working fluid pipeline is arranged on the side of the annular nozzle; a convergent section and a secondary straight pipe section stretching into the inlet of the secondary annular nozzle are successively arranged at the outlet of the annular nozzle; a high-pressure water jet secondary working fluid pipeline is arranged on the side of the secondary annular nozzle; a secondary convergent section and a focusing pipe are arranged at the outlet of the secondary annular nozzle. The working fluid successively enters the annular nozzle and the secondary annular nozzle; then abrasive particles and abrasive-water mixture are sucked; the abrasive particles are mixed and accelerated; finally, the focusing pipe can form high-speed abrasive water jet. Through the post-mixing type abrasive water jet nozzle, the abrasive and the water can be efficiently and uniformly mixed; the abrasion to the focusing pipe caused by non-uniform mixing of the abrasive and the water can be reduced; the energy utilization rate can be increased; and the cutting perform of the abrasive jet can be improved.

Description

technical field [0001] The invention relates to an abrasive jet nozzle, in particular to a post-mixing abrasive water jet nozzle based on annular jet. Background technique [0002] Abrasive water jet is a new processing technology developed in recent years. Its working medium is water and abrasives. It has the advantages of high efficiency, energy saving, environmental protection, wide application range and no thermal effect. It is widely used in light industry, machinery, mining, etc. , chemical industry, military industry and other national economic fields. Among them, the abrasive jet nozzle is the key component of the abrasive water jet, which has an important influence on the formation, cutting effect and energy utilization of the abrasive water jet. [0003] The current post-mixing abrasive waterjet system is mainly composed of CNC machine tool system, ultra-high pressure system, abrasive conveying system and abrasive jet nozzle, among which abrasive jet nozzle loss...

AI Technical Summary

Problems solved by technology

The widely used post-mixing abrasive jet nozzle is mainly composed of straight pipe section, high-velocity fluid nozzle, mixing chamber, converging section and focusing pipe (such as figure 2 As shown), the main part of acceleration is in the convergence section; the main problems are low acceleration efficiency, low energy utilization, serious nozzle wear, and short service life

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