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Title: Ultrasonic cleaning of interior surfaces

An ultrasonic cleaning apparatus for cleaning the interior surfaces of tubes. The apparatus includes an ultrasonic generator and reflector each coupled to opposing ends of the open-ended, fluid-filled tube. Fluid-tight couplings seal the reflector and generator to the tube, preventing leakage of fluid from the interior of the tube. The reflector and generator are operatively connected to actuators, whereby the distance between them can be varied. When the distance is changed, the frequency of the sound waves is simultaneously adjusted to maintain the resonant frequency of the tube so that a standing wave is formed in the tube, the nodes of which are moved axially to cause cavitation along the length of the tube. Cavitation maximizes mechanical disruption and agitation of the fluid, dislodging foreign material from the interior surface.
Inventors:
 [1]
  1. (Aiken, SC)
Issue Date:
OSTI Identifier:
869170
Assignee:
United States of America as represented by United States (Washington, DC) SRS
Patent Number(s):
US 5289838
Contract Number:
AC09-89SR18035
Research Org:
WESTINGHOUSE SAVANNAH RIVER CO
Country of Publication:
United States
Language:
English
Subject:
ultrasonic; cleaning; interior; surfaces; apparatus; tubes; generator; reflector; coupled; opposing; open-ended; fluid-filled; tube; fluid-tight; couplings; seal; preventing; leakage; fluid; operatively; connected; actuators; whereby; distance; varied; changed; frequency; sound; waves; simultaneously; adjusted; maintain; resonant; standing; wave; formed; nodes; moved; axially; cavitation; length; maximizes; mechanical; disruption; agitation; dislodging; foreign; material; surface; ultrasonic cleaning; resonant frequency; sound waves; interior surface; interior surfaces; standing wave; operatively connected; cleaning apparatus; ultrasonic generator; moved axially; filled tube; foreign material; fluid-filled tube; tight coupling; sound wave; /134/