MODELS FOR ASSESSING THE PRESENCE OF DEFECTS IN BEARING SUPPORTS OF AIRCRAFT GAS TURBINE ENGINES

Abstract

Increasing the level of reliability of aviation equipment is quite relevant, but at the same time a difficult task. Aircraft engines (AD) are removed from operation every year if they have not exhausted their established resources and service life. As a rule, the reasons for early termination of operation are defects and malfunctions of individual engine components, their mechanical damage, as well as human errors that lead to a malfunction of the engines. From the performed analysis of the causes of failures and damages of the engines of operational-tactical aviation aircraft, it can be concluded that in the vast majority of cases, the failures manifested themselves in increased vibration, which indicated the destruction of the bearing supports of the compressor and turbine rotors, the failure of which may lead to shutdown and damage to the gas turbine engine. Such consequences adversely affect flight safety and can lead to both the loss of the aircraft and the death of the crew. The specifics of the placement of the bearing supports of the GTE rotors greatly complicates their diagnostics in the framework of non-destructive testing. New models are proposed for assessing the presence of defects in the bearing supports of the rotors of aircraft gas turbine engines, based on the analysis of vibroacoustic signals in the frequency and time domains. A software and hardware complex has been created that allows diagnosing the technical condition of the bearing supports of the rotors of aircraft gas turbine engines.