К вопросу фланкирования зубьев планетарных редукторов ГТД

Abstract

In turboprop and turbofan gas turbine engines (GTE), the torque is transmitted from a turbine to propellers and fan blades via a gearbox. This GTE unit is the most complex and highly stressed engine part, which is designed as per the differential planetary scheme. In order to reduce the impact force when the teeth engage, and to reduce noise and vibration, the tip profile modification (flanking) is used [1]. The effect of a number of factors on the GTE gearbox operation causes wear of the sun gear and satellite gear teeth. The greatest wear occurs at the tooth roots and tips. The initial flanking causes even greater distortion of the tooth tip shape. This results in the frequency range expansion and the gearbox-generated vibration amplification [2]. For example, the beginning of NK-12 engine operation with an initial flank of 0.035 mm resulted in the development of the latter to 0.006 mm through wear. This caused fatigue failures of a number of engine compressor components. A series of studies was conducted t