Jet Engine, Geared Turbofan (GTF)

thingiverse

Jet Engine; Geared Turbofan (GTF) The latest jet engine for passenger planes boasts an increasingly larger Bypass Ratio, pushing the boundaries of engine performance to new heights. Among these innovations, the Geared Turbofan (GTF) stands out as a remarkable achievement. A 3D model was designed and created to illustrate this system. Key design elements include: 1. A compact "Fan Drive Gear System" with a 3-to-1 Reduction Ratio, highlighted in red in photos. 2. Ball bearing and dummy bearing methods are used for each spool's rotation. 3. All stator vanes have been omitted to prevent vane-blade contact, and each rotor except the Low Pressure Turbine (LPT) is designed with support for single-piece printing. The blade angle aligns with the spool rotational direction: - High Pressure Spool: Clockwise - Low Pressure Spool: Counterclockwise - Fan: Clockwise 4. Additionally, parts that require support during printing have been prepared with STL files featuring a "ws" suffix for easier understanding of contents and assembly order. Downloadable files include: STL Files Images: Parts Breakdown for Assembly Aid Excel File: Parts List Purchase Parts Information: Bearing Options: - DDL-1370ZZ (7 x 13 x 4) - 2ea for LP-Spool - 689ZZ (9 x 17 x 5) - 3ea for HP-Spool and Fan - 675ZZ (5 x 8 x 2.5) - 2ea for Fan Drive Gear Train Aluminum Tubes: Refer to Parts List Screws: - Micro screws M1.4x3L - Approximately 60 ea, directly screwed into 1mm dia holes (no nut) - Screws M2 x 6L - 4 ea, see Parts List - Screws M3 x 8L and Washer - 1 ea, see Parts List Assembly Points: Standard skills such as drilling, tapping, filing, tightening, painting, and gluing are required, along with perseverance. Deburring is crucial for smooth gear rotation, especially for gears. When removing support from HPC and LPC rotors, take care to avoid damage. Estimated Total Net Print Time: Approximately 31HR (based on PLA material, 0.4mm nozzle, 0.2mm layer height, 40% infill, no raft, and no support) [Update] Optional Fan: https://www.thingiverse.com/thing:2796851 - 2018.2.17 Modified Rotor: https://www.thingiverse.com/thing:2834191 - 2018.3.21 [Update] 2019.09.01 The FDG Carrier Parts have been modified to improve gear teeth mesh. STL files changed: - Index 11: FDG-Frt-Panel201 → FDG-Frt-Panel301 - Index 15: FDG-Rr-Panel201 → FDG-Rr-Panel301 Refer to the updated Image and Photo added. [Update] 2019.12.16 A brand new Engine has been re-designed, featuring a 10-inch Fan and rotation devices for both spools as seen in selling models. This can be printed with small printers (150x130x100). For more information, please refer to the following URL: https://cults3d.com/en/3d-model/tool/geared-turbofan-engine-gtf-10-inch-fan