DMTA-20073-01EN, Rev. C, November 2015
Chapter 1
20
Figure 1-3 Acoustic wheel components
The acoustic wheel’s main components are the transparent tire, the acoustic wheel
flanges, one plain and the other holding the liquid-control valves, and a pair of
stainless steel rings that hold the flanges to the tire and seal the acoustic wheel. When
assembled, these components constitute a watertight chamber.
The acoustic wheel contains the phased array probe, which is integrated to the
acoustic wheel’s axle. This probe-axle can be removed from inside the acoustic wheel
to clean the liquid chamber or to change the probe-axle. For more information, see the
following sections:
• “Cleaning the Liquid Chamber” on page 85
• “Changing the Probe-Axle” on page 77
The tire is made of a unique low-attenuation material that provides exceptional
coupling with the inspected part and also possesses an acoustic impedance nearly
identical to water.
Tire Tire flange with valves and
internal retaining screws
(probe-cable side)
Plain tire flange with
external retaining
screws
Liquid-control valves
Stainless steel ring with
ports
Stainless steel ring with
ports and captive screws
(probe-cable side)
Probe-axleFirst and last probe-element indicators
Retaining C-clip
Axle-end bushing
C-clip groove on axle end
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