My first Stirling machine - made by my grandfather.
In my younger years, my grandfather showed
me a machine that he had made himself - he used to
work in a weaving mill as an engine fitter. He called
it a "Warmluftmaschine", i. e. a machine running
with hot air, and he had made it just to try out the
working principle. Unfortunately I was too young to
understand how it worked, but nevertheless I enjoyed it when
it was running!
Later he gave it to me, and I still hold it
with great admiration as a keepsake from him.
Here are some photos (click to enlarge) of this one-piston air cooled
Stirling machine (beta type):
Notes on the pictures:
- "Opa, was machsch du do?" (Grandpa, whatcha doin'?)
- General view.
The aluminum part on the right is not original
- my grandpa added it so that I did not bruise my little fingers
under the moving connecting rods.
Note the alcohol burner,
soldered from a copper lamp cover. The machine runs for several
minutes, until the somewhat small cooling fins get too hot,
reducing the temperature difference.
- Detail: connecting rod and piston.
The rod to the displacer
runs through the middle of the power piston, which is connected
to the crank shaft of the red flywheel. The 4 rods a arranged
in a way that I saw nowhere else so far - one "spare hole"
shows a trace of earlier experiments.
- The power piston and the displacer, disassembled.
- The machine in maintenace phase, power piston and displacer
- Don't miss to watch the animated gif
from M. Keveney,
which shows how the machine works. He has many other well done machine
drawings there as well.
Copyright(c) 2006 by uh-lab.de