$3.50Jet Engine Component; Torque Meter, Planetary Gear type

myminifactory

Engines that utilize rotational output (turboprop and turboshaft) feature a torque meter system that counters the opposite torque of engine output. The most common method in integrated engines is to use oil pressure from the engine. This involves replacing anti-torque with axial movement and adjusting the control valve's opening to balance pressure inside the piston and cylinder with anti-torque force. The resulting pressure is then displayed on the cockpit panel as a torque meter, used for engine control. To achieve this axial movement, there are four primary methods: One uses planetary gear with spur gears (the carrier shaft acts as the output shaft), incorporating a helical spline around the ring gear to generate axial force through the ring gear. This method allows for a relatively large piston area, enabling the use of engine oil pressure. The second method employs planetary gear with helical gears (the ring gear serves as the output shaft) and utilizes the axial force generated on the carrier gear(s). However, this approach requires a higher-pressure pump due to narrower piston areas. The third method involves a reduction gear with a helical gear train, primarily used in turboshaft engines. It leverages axial force from the intermediate gear. Lastly, other engines exploit the difference in torsion between two or more shafts (hydraulic or electrical). This model replicates the first method as a cutaway model: A. The components include: ① Sun Gear ② Carrier gear ③ Ring gear with helical spline on the outer diameter (moves axially) ④ Housing with fixed helical spline ⑤ Piston and cylinder with piston ring ⑥ Control valve ⑦ Oil passage (engine oil, torque meter oil, bleed) ⑧ Brake adjustment screw for operation reproduction and handle By reproducing anti-torque through a screw and turning the handle, you can observe the movement of the ring gear, piston, and valve. To operate without oil, gaps between parts are enlarged, such as between the piston ring and control valve. B. Assembly Manual (PDF format, 14 pages): A detailed assembly manual is provided, including "Parts List," "After printing treatment," and "Assembly procedure," based on standard skills like filing, drilling, tapping, gluing, and tightening. C. Purchase Parts: 1. Screws: M1.4x3.5L, M2x6L, M2x8L, M3x8L, M3x15L, M4x35L 2. Others: φ6 ABS Pipe, φ6x25L AL Pipe, φ5x10L Spring D. STL File: 26 total items, including the stand and tools, with almost all parts redesigned for this purpose. "ws" in the last two digits of file names indicates "With Support," a special design. E. Total Net Print Time: Approximately 51 hours (estimated using PLA, 0.4mm nozzle, 0.2mm layer height, 40% infill, no raft or support). F. Printing settings: Raft, support, layer height, and infill may vary based on your experience. My models were printed with "idbox" using a 0.4 nozzle and 1.75 PLA. I wish you every success!