| We compute the life-span of aeroengine parts by fly-hours now While, advanced country compute the life-span of whole-engine by test-bed long and outfield-fly in advance, the safe circle life-span of the main parts by high-low circle fatigue experience, the circle life-span combining heavy repair overhaul. XX engine is the power fitting of XX plane of our country,.It is used widely and general. Due to technology and outlay, we do not study the life-span of main parts.so, it bring biggish safety-trouble for engine and tremendous pressure for fitting service.resolving the key question firstly of the paper is statistic analysis and compute corresponding relation (aviation conversion ratio)between engine outfield-fly hours and circle times. Due to XX engine is used widely and general, the calculation quantity is very big, statistic and analysis date is very much, the work is very difficult.The main work of the paper is as follows:according to structure and use character of XX engine, referring to the new way of aeroengine life-span study in advanced country, making use of production of civil engine prolong life and outfield-fly in advance, we study the life-span of main parts of engine. The paper compute collectivity load table of engine by statistic fistly, Stress section、criterion cicus load and representive section life conversion ratio of main parts, secondly, make low circle fatigue life experience thirdly, confirm the part life-span lastly.The paper compute main parts life-span in reason. it settle technology base for technology general life、scientific maintenance and repair、safe use of XX engine. At the same time, the paper compute life use potential and weakness tache of main parts. the production exert directly to betterment of turbo vane parts. It improve engine use security and plane work ratio, accelerate develop-plan of upswing engine, and save develop outlay. It is significative for compound develop of our army fitting. |
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