A method for assessing the life of aero-engine accessories

Abstract

The invention relates to a method for evaluating the service life of an accessory of an aircraft engine. The method comprises the following steps of: formulation of a primary evaluation implementation scheme, sampling evaluation, life evaluation and examination, acceptable risk and serviceability analysis, issue life determination, conclusion appraisal and reporting implementation. The method comprises the steps of firstly knowing whether the normal working of the engine is influenced by the working and adjusting conditions of the accessory on the engine, and if the performance change of the accessory is remedied by the adjustment of the accessory on the engine, evaluating whether the accessory has margin to work to a next issue life according to the size of the adjustment amount. According to the method, the concept of 'condition-based' maintenance of the accessory of the engine is introduced, the service life is no longer controlled, aspects of evaluation time interval and the like in existing accessory life control methods are broken through, and adaptable management methods are scientifically and reasonably formulated according to accessories with different lives and states.

Description

technical field [0001] The invention relates to the field of engine maintenance, in particular to a method for evaluating the life of an aeroengine accessory. Background technique [0002] Gas turbine engine accessories belong to different systems such as main fuel system, afterburner fuel system, nozzle control system, anti-surge system, anti-icing system, electrical equipment, lubricating oil system, etc., and their structures, functions, and installation and use conditions vary. same. During the accessory testing process, if the accessory life assessment is strict, it may cause waste of resources and increase costs. If the accessory life assessment is loose, it may cause machine crashes and human deaths due to life assessment problems. Therefore, finding a scientific, practical and economical method to control the service life of accessories is a necessary condition to ensure the safe and reliable use of engines with different accessories. [0003] Existing accessories ...

AI Technical Summary

Problems solved by technology

[0003] Existing accessories mainly determine the refurbishment life by testing, which is not only costly, but also due to the difference between the service conditions and test conditions, the test cannot fully reflect the actual life of the accessories, which also leads to the insufficiency and backwardness of the research on the life of aero-engine accessories. and chaos

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