The turboprop engine is equipped with an oblique transmission mechanism in the accessory transmission device to drive the AC engine. Located on the lower right side of the accessory drive. The inclined transmission chain is composed of thin-walled transmission shaft, inclined transmission middle driving bevel gear/middle passive bevel gear pair, inclined transmission lower driving bevel gear/lower passive bevel gear pair, inclined transmission lower horizontal gear/AC motor gear and other parts.
When the engine is working, the power input end is an elastic shaft. An outer spline is added at the rear of the elastic shaft (near the compressor end), which is connected with the inner spline of the thin-walled transmission shaft. The other end of the thin-walled transmission shaft transmits power to the driving bevel gear in the oblique transmission through the spline, and then through the driving bevel gear in the oblique transmission, the lower driving bevel gear in the oblique transmission passes through the inner cavity of the right lower rectifying support plate of the accessory gearbox, and is transmitted to the lower driving bevel gear in the oblique transmission, The oblique lower passive bevel gear drives the oblique lower horizontal gear through the internal spline, and then the alternator gear drives the alternator.
The fault bearing is installed on the lower driving bevel gear of the oblique transmission of the lower aeroengine, and is a deep groove ball bearing, as shown in the figure.