Turboshaft Engine with Radial Turbine

cults3d

This model is a turboshaft engine which uses a radial compressor and a radial turbine. It is a type mainly used for compact engines, like the auxiliary power unit in helicopters. Created to provide a source of shaft horsepower for turning other models, besides just explaining its structural aspect. A home vacuum cleaner is the source of power for this model. The features are as follows: 1. Radial compressor (Impeller), Diffuser 2. Radial turbine rotor, Turbine nozzle 3. Planetary reduction gears 4. Output shaft 5. Use metal ball bearings for all rotating shafts. 6. Prepare parts for reversing rotating direction. 7. Introduce the clamp system and finger screw to make disassembly easy. 8. The vacuum nozzle with variable opening for speed control. Since it rotates well beyond anticipation, it can be used as a source of power. But the maximum allowable RPM and torque are not verified. Please decide by your own responsibility. Video: https://youtu.be/maxeQ6HPnNI B. Assembly Manual (PDF format, 20 pages) The detail assembly manual including "Parts-List", "After printing treatment" and "Assembly procedure" are prepared based on "Standard Skill (Filing, Drilling, Tapping and painting)". To make it rotate smoothly, careful eccentricity and gap adjustment are needed. C. General Notes 1. Bearings Metal Ball Bearing is used for every shafts. Refer to Appendix. 2. For M1.4 Screw No need "Tapping". Drill with φ1.0 drill then direct screw-in. 3. STL file "ws" of last 2 digits of file name means "With Support" special designed. Total STL files are 48 items including the optional items (Vacuum Duct, Stand etc.). 4. Blending of gear tooth profile is important to get smooth rotation. 5. For the Helicopter Power Train, use the following parts as a set. - Comp-Diffuser01CCW - Impeller01CCW - Turb-Nozzle101CCW - Turbine101CCW Total Net Print Time: Approx. 72HR - (Estimated as case of PLA, 0.4mm Nozzle, 0.2mm Layer Height, 40% infill and No raft and support) Especially, Air-Intake-Case201mws.stl needs about 12 hours to print. Note: When at actual print, each parameter may be adjusted by your experience. [Update] 2019.05.07 Gear-Carrier102.stl changed 2019.05.09 Assy-Manual typo revised 2019.06.29 Gear-BRG-Hsg301ws.stl added 2019.06.30 Air-Intake-Case201.stl (No support STL) is added for reference. 2019.07.02 VC-Duct-Sprt01.stl, VC-Duct-Sprt02.stl-added 2019.08.20 Note C.5 added Air-Intake-Case301ws.stl (with my designed support) added. I wish you all the best!