Jet Engine Desk Fan (V2.1)

thingiverse

A Desk Fan Born From a Jet Engine Concept.\nUnveiled version yet - don't try printing it now! This is a proof of concept that needs further refinement before becoming fully operational.\nThe version now running is fairly quiet and pleasant although relatively underpowered; unfortunately, the motor gets extremely hot due to inadequate cooling system design.\nA desk fan's shaded pole induction motor (I bought one for £10 from Argos) powers a centrifugal compressor inspired by early jet engines and modern turboprop/turboshaft engines. The compressor pushes air through the narrow gap around the shroud.\nThe entire design is created with OpenSCAD, check the latest code on my Github repository (https://github.com/pittance)\n\n\n \n \n Print Instructions Don't Yet!\nThis V2.1 design is significantly smaller than V1, easily printable on a smaller round bed; however, it's still an extensive print - expect more than 10 hours for all components.\nAll bolts holes are designed with M3 threads in mind, ideal ream and tap to ensure a secure grip.\nThe exact fan I used is now out of stock, consider replacing with this: http://www.argos.co.uk/static/Product/partNumber/4251800.htm\nSolved Issues: \nV2 got far too hot as it lacked proper motor base cooling, resolved in V2.1; although the motor still overheats with PLA, ABS might provide a better outcome.\nThe terrible noise produced by V1 originated from a poor choice of rotor and stator numbers - fixed by changing blade count to 11 (from 12) and stators to 5 (from 6).\nExisting Issues: \nHEAT: The motor becomes scorching hot and the mounts start to melt, even with improved ventilation; further thermal insulation might be needed, such as a mounting plate separating the hot motor from PLA.