Apparatus for generating a high-pressure fluid jet

B - Operations – Transporting – 24 – C

Patent

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Details

B24C 5/04 (2006.01) B24C 1/04 (2006.01) B26F 3/00 (2006.01)

Patent

CA 2457530

An improved apparatus (10) for generating a high-pressure fluid jet includes an orifice mount (11) having a frusto-conical surface that engages a frusto- conical wall in a cutting head (22), the geometry of the orifice mount and cutting head being selected to increase the stability of the mount and reduce deflection of the mount adjacent a jewel orifice (20), when subjected to pressure. Alignment of a nozzle body (37) and the cutting head is improved by providing pilot (42, 43) diameters both upstream and downstream of threads (41) on the nozzle body and bore of the cutting head, respectively. Accurate placement of a mixing tube (49) in a cutting head is achieved by rigidly fixing a collar (52) to an outer surface of the mixing tube, the collar (52) engaging a shoulder (34) and bore of the cutting head downstream of a mixing chamber, to precisely locate the mixing (33) chamber axially and radially.

Dispositif amélioré servant à produire un jet de fluide haute pression, qui comprend un support d'orifice présentant une surface tronconique qui entre en contact avec une paroi tronconique de tête de découpe. La géométrie du support d'orifice et de la tête de découpe sont sélectionnées de manière à accroître la stabilité du support et à réduire la courbure du support à proximité d'un orifice de précision, lors de l'application de pression. On améliore l'alignement d'un corps de buse et de la tête de découpe en prévoyant des diamètres pilotes en amont et en aval des filets du corps de buse et de l'orifice de la tête de découpe, respectivement. On obtient une mise place précise d'un tube de mélange dans la tête de découpe en fixant fermement une bride sur une surface extérieure du tube de mélange, la bride entrant en contact avec un épaulement et l'orifice de la tête de découpe, en aval de la chambre de mélange, de manière à positionner précisément la chambre de mélange axialement et radialement.

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