Method of monitoring heat exchanger vibrations

Details Method of monitoring heat exchanger vibrations Method of monitoring heat exchanger vibrations

1993-10-21

1994-07-12

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73168, 367 99, 376248, 376252, G01N 2910, G01N 2924

Patent

active

053277830

ABSTRACT:
A non-intrusive vibration measurement system and method using commercial ultrasonic instruments together with digital signal filtering and analysis techniques is adapted to quantitatively detect vibrations as small as 0.04-inch peak-to-peak. The system and its methodology is used for in-service vibration monitoring of internal components of check valves, pumps, nuclear reactors, steam generators and heat exchangers, especially when the vibration frequency is too low for quantitative analysis by accelerometers and when the strain induced is too low for strain gauge analysis, and when the vibrating component is in an "encased" environment.

REFERENCES:
patent: 4920802 (1990-05-01), McMullin et al.
patent: 4977778 (1990-12-01), Nafziger et al.
patent: 5008841 (1991-04-01), McElroy
patent: 5154080 (1992-10-01), Hill et al.
patent: 5159835 (1992-11-01), Nafziger et al.
patent: 5228342 (1993-07-01), McShane

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