METHOD FOR VIBROACOUSTIC DIAGNOSTICS OF THE TECHNICAL CONDITION OF THE INTER-ROTOR BEARING OF A TWO-SHAFT GAS TURBINE ENGINE Russian patent published in 2023 - IPC G01M15/02 

FIELD: complex diagnostics.

SUBSTANCE: invention relates to a method for complex diagnostics of the technical condition of the inter-rotor bearings of two-shaft aircraft and ground gas turbine engines (GTE) using vibration diagnostics methods and can be used in aircraft engine building. The proposed method for vibroacoustic diagnostics of the technical condition of GTE bearings can be implemented using the device shown in figure 1, where it is indicated: 1 - wireless vibroacoustic sensor type VWV001; 2 - rubber sucker; 3 - extension rod; 4 - inspection window of the front part of the working blades of the high-pressure turbine; 5 - shelf of the working blade of the high-pressure turbine. In this case, the vibration sensor 1 of the VWV001 type, using an extension rod 3, at the end of which there is a threaded connection, is installed through the inspection window of the front part of the working blades of the high-pressure turbine 4 on the shelf of the working blade of the high-pressure turbine 5 in such a way as to get as close as possible to the GTE bearing support, and fixed with a rubber suction cup 2, then disconnect the threaded connection between the vibration sensor and the extension rod. The extension rod is removed from the inside of the gas turbine engine through the inspection window of the rotor blades. To estimate the magnitude of the vibration amplitude excited by the inter-rotor bearing, the low-pressure rotor is spun up by a manual drive to a rotation speed of 60-100 rpm. The technical condition of the inter-rotor bearing is assessed using the crest factor method. A conclusion is made about the technical serviceability of the inter-rotor bearing.

EFFECT: creation of a method for complex diagnostics of the technical condition of the inter-rotor bearings of two-shaft aircraft and ground gas turbine engines.

1 cl, 1 dwg