Features of operation of turboshaft engine TV3-117
In this article the statistical data of failures of TV3-117 engines obtained from the operating organizations and the aircraft repair entity of АО UWCA (Y ekaterinburg) are provided. The question condition on detection and control of damages of the TV3-117 engine in the course of operation because of hit of foreign objects to the air-gas highway of the engine, and also a number of the shortcomings connected with it is shown in article. Damage of jet engines in use because of hit of foreign objects to the air-gas highway led to entering of special requirements in «Airworthiness standards of engines of air vehicles» which accomplishment allows to provide a certain degree of reliability of operation of the engine in case of possible hits of foreign objects. As hit of foreign objects first of all leads to damage of the compressor, at a design stage of its design depending on dimensions of the input device and feature of the entrance directing device the possibility of protection against hit of foreign objects is considered. Also a number of testing of the engine according to resistance of a design of the engine to mechanical impact of foreign objects is carried out. As completely it is difficult to prevent hit in the engine of firm particles, one of methods of decrease in the early engine renting (EER), extension of admissions in the maximum sizes on damages for the admission of the engine to further operation is. The actual requirements to admissible injuries of shovels of the compressor to operation and the analysis of their change are provided in article. The analysis of the existing actions for prevention of hits of software is carried out, and also several directions on prevention of hits of software in the engine are considered.