Some Problems of a Diagnosis of Turbine Engine BearingsUsing FAM-C Method

摘要

Diagnostic FDM-A method [2] based on a measurement of frequency modulation of apulsation component as well as FAM-C method based on a measurement of a alternating current'sfrequency have been developed in Air Force Institute of Technology. These methods provide todefine a level of a sub-assembly's abrasive wear and its localization during normal work of a powerunit. It is possible to define numerous parameters of bearings and their kinematics pairs as well as arotor assembly. They are: a level of a bearing rolling friction, smoothness of a bearing cage'smotion, a quantity of a radial clearance. It also provides to detect resonances in elements as well asobserve a shape and a relative height of characteristic patterns, from which it is possible tocalculate, among others, a quantity of a mechanical quality factor of a kinematics pair — it ispossible to define an operating time reserve of the kinematics pair to resonance.