Evaluation of Refrigeration Compressor Quality Using Acoustic Techniques

摘要

A system using acoustic techniques was designed for the nondestructive testing of refrigeration compressors. An initial system evaluation was restricted to one connecting rod bearing and one suction valve of a Dunham-Bush model BP-44(II) refrigeration compressor. An oversize bearing and a leaking suction valve were used to simulate defects which do not at the time of acceptance testing impair functionality of the compressor, but eventually lead to shortened functional life and/or catastrophic failure. Results of the evaluation indicate that such defects have vibrational patterns which can be distinguished from nondefective bearings and suction valves. (Author)