METHOD OF DIAGNOSING AND REPAIRING NONREUSABLE AND SHORT-LIFE GAS TURBINE ENGINES Russian patent published in 2009 - IPC G01M15/14 

FIELD: engines and pumps.

SUBSTANCE: invention relates to rocketry, particularly to diagnosis, repairing, acceptance and delivery of gas turbine engines for aircraft and power installations, which work on liquid and gas fuels. The method of diagnosing and repairing nonreusable and short-life gas turbine engines involves recording current criteria values of the engine condition, comparing them with given standard values, eliminating detected defects and carrying out inspection tests. Current criteria values of the engine state are recorded through visual inspection with subsequent disassembling of the engine, sending the assemblies and component parts to vendors and manufacturers, carrying out non-destructive control methods and laboratory tests. The recorded criteria values of the engine are compared, for example, with criteria of the condition of an engine, which has withstood official tests, and formation of minor components to be repaired, replaced and considered suitable for assembling, while meeting requirements for repairing the list of assemblies. The engine is then assembled and mounted on a testing stand. Stand acceptance tests are done with adjustment of parameters and regulation of all its systems and tests on compliance with specifications for quality of assembling and compliance of key engine parameters to given values. An engine is chosen from the batch which has undergone acceptance tests and endurance tests are carried out on that engine. During fatigue testing, there is further running which exceeds the total operating time of all operation modes. Making conclusion on evaluation of repairing technique and allowing engines, belonging to one batch, for further use with initial fixed or changed service life is done without disassembling the engine, and after that, the rest of the engines from this batch are accepted and delivered for operation. Further running is done, exceeding the total operating time for all operating modes by 1.5…2 times.

EFFECT: such a method widens functional capabilities of functional testing assemblies.

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