| 摘要 |
<p>A nozzle apparatus for use with an abrasive fluid jet cutting system (1), an d its method of construction and operation, are disclosed that reduce the wear and erosion problems typically experienced in the cutting jet~s nozzle (16). This improved nozzle apparatus comprises (a) a nozzle (16) having an entry port for receiving a slurry consisting of a carrier fluid and abrasive particles, an inner wall for directing the flow of the slurry, and an outlet port through which the slurry exits the nozzle, (b) wherein at least a porti on of the nozzle wall is porous, and (c) a lubricating fluid chamber (14) that surrounds the porous portion of the outer wall of the nozzle, the chamber having a port where a lubricating fluid enters the chamber, with the chamber port connecting to an input pipe which connects to a filter (12) for filteri ng contaminants that might clog the pores of the porous portion of the nozzle. The nozzle operates by having the lubricating fluid pass from the lubricatin g reservoir and through the porous wall to lubricate at least a portion of the surface of the nozzle inner wall so as to resist erosion of the wall, as wel l as result in an abrasive slurry jet with improved coherence and cutting efficiency.</p> |
