Abrasive blast cleaning nozzle

Details Abrasive blast cleaning nozzle Abrasive blast cleaning nozzle

1997-07-17

1999-11-02

Rose, Robert A.

Abrading

Machine

Sandblast

239589, 2395905, B24C 504

Patent

active

059759968

ABSTRACT:
A nozzle for an abrasive blast cleaning apparatus consisting of a short, relatively rapidly converging inlet section, a constant-area throat, a rapidly diverging first diverging section, and a long second diverging section that diverges less rapidly than the first diverging section. The inlet section quickly accelerates the abrasive particles after entering the nozzle, while the first diverging section rapidly brings the relative velocity of the air stream and the abrasive particles to about Mach 1.4. The second diverging section helps to maintain the relative Mach number while the abrasive particles continue to accelerate. This makes abrasive blast cleaning more efficient, particularly because the kinetic energy of the abrasive particles emerging from the nozzle is significantly increased.

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patent: 5545073 (1996-08-01), Kneisel
"Redesigning Blasting Nozzles to Improve Productivity", Gary S. Settles and Stephen T. Geppert, Journal of Protective Coatings and Linings, Oct. 1996, vol. No. 10, pp. 64-72.
"A Scientific View of the Productivity of Abrasive Blasting Nozzles", Gary S. Settles and Sanjay Garg, Research News, vol. 12, No. 4, Apr. 1995, pp. 28-41, 101-102.

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