Thrust balanced turn base for the nozzle assembly of an abrasive

Details Thrust balanced turn base for the nozzle assembly of an abrasive Thrust balanced turn base for the nozzle assembly of an abrasive

1997-03-07

1998-08-18

Eley, Timothy V.

Abrading

Machine

Sandblast

451 99, 239654, B24C 504

Patent

active

057952140

ABSTRACT:
A thrust balanced turn base for changing the direction of a fluid flow containing entrained abrasive media is provided. The turn base includes an elongated member having an inlet for the fluid flow with the entrained abrasive media. The turn base further includes a first internal passageway that extends in a downstream direction from the inlet. The first passageway includes a first throat, a converging portion between the inlet and the throat, a diverging portion extending downstream from the throat, an additional converging portion downstream from the diverging portion, a turning portion downstream from the additional converging portion that converges to a second throat and that leads to a nozzle that conducts the fluid flow containing the entrained abrasive media in an angled direction relative to the long axis of the turn base. The turn base also includes a second internal passageway that is in fluid communication with the first internal passageway at an aperture in the first internal passageway located between the inlet and the first throat. The second internal passageway includes a first portion that extends from the aperture and a second gentlely diverging portion that extends from the first portion and that terminates abruptly in a second nozzle that is oriented at about 90.degree. to the long axis of the turn base. The first portion of the second passageway is configured to divert a portion of substantially abrasive media-free fluid flow from the first internal passageway. The second nozzle is oriented and sized so that the thrust of the entrained abrasive media flow from the first nozzle is substantially counter balanced by the thrust of the abrasive media-free flow from the second nozzle.

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