Jet Engine Component (11): CVT(CSD), Toroidal type

简介

There are various types of CVT (Continuous Variable Transmission), but there are the following types of friction type. (1) Belt type using V-groove pulley ... There are various belts such as metal belts and chains. (2) Toroidal type that uses the donut-shaped roller Currently, the method of (1) is widely used in automobiles. (2) has been used for several car models, but it seems that it has ended. These types of CVT are not used in the aero engine itself. However, I knew that the Toroidal CVT of (2) is used for an AC generator (115V, 400Hz) called IDG (Integrated Drive Generator), which is an accessory for the aircraft that is attached to the gearbox. Also it is called CSD (Constant Speed Drive). I wanted to know the basic structure and made a simple model. A. Features of this model (elements required for products vs countermeasures for this model) Required elements for products ・→・ Countermeasures in this model ―――――――――――――――――――――――――――――――――――――――――― ① Part accuracy (high accuracy required) ・ → ・ PLA material, FDM 3D printer used ② Bearing (Thrust bearings are often used) ・ → ・ Ball bearings are used instead ③ Special oil (traction) (high friction resistance) ・ → ・ Not used ④ Power Roller shaft rotation method (using hydraulic pressure) ・ → ・ Lever method ⑤ Double toroidal set (for thrust cancellation) ・ → ・ Single set ⑥ Output shaft planetary gear mechanism ・ → ・ Omitted [Video} https://youtu.be/aMOuT2x_L-8 The speed changing state has been reproduced using the "Air…