TECHNICAL DIAGNOSIS METHOD FOR GAS TURBINE PLANT Russian patent published in 2014 - IPC G01M15/14 

FIELD: machine building.

SUBSTANCE: method of GTP technical diagnosis can be used at the operation of compressor plants. The GTP developer performs on-site analysis of changes in the GTP engine parameters in the course of operation as compared to the parameters obtained at acceptance tests at the manufacturing plant, afterwards he evaluates the power produced at the shaft of the engine's free turbine, its compliance with the power characteristic as per the operational guidelines, considering the installation of a unit to adjust the limitation of maximal temperature of gas at the free turbine outlet. Further on the following is determined: the actual power at the free turbine shaft reduced as per the ambient pressure and specified as per the current temperature values at the engine input and temperature at the exhaust device, the reserves up to the engine speed limits, reduced and nominal, and the temperature of the free turbine limited to nominal mode. Quantity and intervals of performed cleansing of the GTP engine's gas-flow duct within the operation period are analysed, the efficiency of the above cleansing is evaluated by comparing the deviations of parameter values before and after cleansing from the data of the acceptance tests. Changes of the engine lubrication system parameters and of the engine vibration parameters are evaluated, the GTP engine gas-air flow duct is inspected in visual-optical manner by an industrial endoscope, namely gas generator compressor, combustion chamber, high-pressure turbine, free turbine are inspected. Implemented measures aimed at the stabilisation and improvement of operating parameters, service life and reliability of GTP performance as well as the results of the performed GTP maintenance and repair within the whole operation period are analysed, then an opinion on the possibility or impossibility to increase the maintenance and/or repair frequency up to the design values, namely as per the GTP technical state, shall be drawn up.

EFFECT: improved reliability parameters at GTE operation.