METHODS FOR INSPECTION OF INTERNAL STRUCTURE OF COOLED HPT BLADES WITH PERSPECTIVE COOLING SYSTEMS

2019

Авіаційно-космічна техніка та технологія, Vol 0, Iss 8, Pp 133-137 (2019)

The cooled turbine blades are very complex, labor-intensive parts, both for manufacturing and for inspection. With the development of aviation gas-turbine engines, the design of cooled turbine blades is becoming more complicated. To create new promising cooled turbine blades requires the introduction of new advanced manufacturing technologies and new progressive methods of dimensional control. This paper discusses the existing methods of inspection, which are used in the manufacture of turbine blades in mass production. Their advantages and disadvantages are given. The results of the work carried out in the framework of the international project "AERO.UA" are presented. The work was carried out to develop the inspection method of the internal cavity of the high-pressure turbine (HPT) blade with a promising cooling system developed at Ivchenko-Progress. The inspection of the internal cavity of the HPT blade with a promising cooling system was performed using computed tomography. Computed tomography performed at the Air Force Institute of Technology (ITWL) Warsaw on the General Electric X-Ray phoenix V | tome | X m tomograph. According to the results of testing the inspection method, the possibility of identifying manufacturing defects, the detection of which under the conditions of steady-state production is associated with very labor-intensive operations, is shown, and in some cases, inspection is impossible at all without destroying the part or performing expensive repairs. An assessment was made of the possibility of monitoring the geometrical dimensions of the internal cavity and external surfaces of cooled turbine blades. With the use of computed tomography, the dimensional control is possible with an accuracy of 0.01 mm. But to bind the blades to the base surfaces specified in the drawing when scanning, you must use a special snap. To confirm the possibility of controlling the dimensions specified in the drawing, it is necessary to continue work on scanning the cooled turbine blades using special tools.

article

English
Ukrainian

National Aerospace University «Kharkiv Aviation Institute», 2019.

рабочая лопатка, система охлаждения, компьютерная томография, Motor vehicles. Aeronautics. Astronautics, TL1-4050