Research on the technology of pressure relief and outburst prevention in the seam area of high pressure water jet cutting

2020 ◽  
Author(s):  
Chengcheng Li
Keyword(s):  
High Pressure ◽  
Water Jet ◽  
Pressure Relief ◽  
Water Jet Cutting ◽  
Pressure Water ◽  
High Pressure Water Jet

Research and Apply the Technique of Dip Rock Cross-Cut Uncovering Serious Outburst Coal Seam Group

2013 ◽  
Vol 868 ◽  
pp. 356-360
Author(s):  
Jun Liu
Keyword(s):  
High Pressure ◽  
Coal Seam ◽  
Coal Dust ◽  
Water Jet ◽  
Pressure Relief ◽  
Dust Extraction ◽  
Pressure Water ◽  
High Pressure Water Jet ◽  
Outburst Coal Seam ◽  
Integrated Technique

Apply high pressure water jet drilling and reaming integrated technique to research the technique of dip cross-cut uncovering serious outburst coal seam group; numerical simulation by FLAC3D concludes that how much the diameters be after being reamed can get relief pressure well at different hole spacing; it shows that the technique expands pressure relief range, increases the permeability of coal and improves the drainage efficient at uncovering coal area in the experiment. Improve the craft and equipment of high pressure water jet drilling and reaming integrated technique, solve the problem of coal dust extraction difficultly at the dip hole, prolong high pressure and rotating joints life; the research indicates that high pressure water jet drilling and reaming integrated technique gets well effect on uncovering coals speed and outburst prevention effect, its of promotion application value to uncovering coal safely and efficiently in mine.

Fatigue Simulation of High Pressure Water Jet Cylinder

2012 ◽  
Vol 538-541 ◽  
pp. 909-914
Author(s):  
Kun Wang ◽  
Deyi Ma ◽  
Yue Gan Song
Keyword(s):  
High Pressure ◽  
Water Jet ◽  
The Body ◽  
High Pressure Cylinder ◽  
Element Analysis ◽  
Water Jet Cutting ◽  
Pressure Cylinder ◽  
Pressure Water ◽  
Water Cutting ◽  
High Pressure Water Jet

The development of abrasive water jet cutting technology needs much higher reliability requirements of water cutting system. As one of the core parts in pressure generating system of water jet cutting, the High-pressure cylinder should have a stable fatigue life. The materials of the high-pressure cylinder are 34CrNi3MoA and AISl4340, and the stress of it under high pressure conditions was analyzed with the finite element analysis software ANSYS. For the existence of repeated plastic strain, the fatigue curves were gat by long-life theory. At last the fatigue of the high-pressure cylinder was simulated based on the stress. The results show that the stress is in distribution of 29MPa - 699MPa, and main of the body is under elastic strain. The whole fatigue condition can meet the requirements, but fatigue situation is worse in close to high pressure check export, the minimal life is 250000 cycle indexes.

ROBOTIC HIGH PRESSURE WATER JET CUTTING of CHUCK SLICES

1990 ◽  
Vol 12 (2) ◽  
pp. 131-136 ◽  
Author(s):  
W.K. HEILAND ◽  
R.P. KONSTANCE ◽  
J.C. CRAIG
Keyword(s):  
High Pressure ◽  
Water Jet ◽  
Water Jet Cutting ◽  
Pressure Water ◽  
High Pressure Water Jet

Numerical Simulation of Liquid-Solid Two-Phase Flows on Internal and Outside Flow Field in High Pressure Abrasive Water Jet Cutting Nozzle

2008 ◽  
Vol 392-394 ◽  
pp. 565-569
Author(s):  
Hong Yan Ruan ◽  
Hui Xia Liu ◽  
S.Y. Ding ◽  
K. Yang ◽  
Xiao Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Flow Characteristics ◽  
Water Jet ◽  
Two Phase ◽  
Finite Analytic Method ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Hybrid Finite Analytic Method ◽  
Pressure Water ◽  
High Pressure Water Jet

Based on premixed high pressure water jet cutting, five kinds of nozzle models were established, and the control equations and closed equtions of liquid-solid two-phase were given. The inside-outside liquid-solid two-phase flow characteristics of the nozzles were simulated by Hybrid Finite Analytic Method (HFAM). The results indicate that the taper-beeline nozzle has better convergence characteristic, good hydraulic characteristic and lower radical velocity, thus it is more suitable for premixed high pressure water jet cutting nozzle.

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