Variable Length Stroke
Вставка
- Опубліковано 16 вер 2024
- Stirling Engines have variable amounts of heat delivered to each piston stroke. As an engine runs faster, the time for the gas to be heated is reduced. This reduces the amount of expansion available to push the piston.
How about a variable length stroke mechanism that can adjust?
Very nice set up Andrew. A variable length stroke is essential for tuning the Stirling Engine optimally.
It's impossible to make it easier, it's a good option!
I too have been considering variable stroke control for a sterling engine, based hot side temperature vs cold side temperature rather than speed to maintain torque and allow low and high temperature operation. Would reduce overall power as temperature lowers but should still run down in power until bearing and piston friction exceeds available torque.
Hi There Jack - Yes with variable stroke it should carry on running as then temperature lowers. Also it should start quicker when starting and the temperature is building.
correct me if im wrong, ive not even built my first stirling engine kit (any suggestions on good quality ones?) yet, but that mechanism would only deliver power to the flyweel in one direction of the stroke. Doesn't a stirling piston attached in the usual way deliver power during both the expansion and contraction? Would this not make the engine less powerfull?
No. The mechanism allows for both the "push" and the "pull". So, what power there is, is all transmitted to the shaft. Kits - there's quite a lot for 3d printers. Search thingiverse - www.thingiverse.com/search?q=stirling+engine&type=things&sort=relevant
Also Kontax sell kit versions of their superb LTD engines
www.stirlingengine.co.uk/
@@andrewhall2702 Ah yes, very sorry, I didn't correctly see that on my small Phone screen. Thank you for the suggestions!
I suggest timing of the displacer would need rethinking as rotation angle of the crank is now also variable.