3D printed flexure bearing/ collected flat spiral spring

Hi folks!

Yep, I've been busy so much! :(

Here is my new small project with my 3D printer from ABS material.

The springs are only 1 mm thick. I collected 4 pcs of them with 1 mm spacers.

The product is so cool!

I hope it could be work with a nice free piston engine soon!

Hacked air pump as an alpha type Stirling engine heat pump

Hi folks!

Here is my new little HACK just for fun!

I was excited about this configuration, because on the web I can't found too much information from this type of engine. 

Some people said it is failed, and this configuration is not possible to work, but why?

I needed one! :)

OK! I found some pdf documents about some experiments without any usable information for a simple DIY engine. 

So, I started to think as a modeller, how can I create a simple design from something what I can buy in the market.

So a linear air pump was the solution. 

This is a long life, low maintenance solution with a good price and life time period. 

I choosen the RESUN's ACO-003 electromagnetic air pump for it.

It has a 45mm diameter piston with dry sealing in a graphite-steel cylinder.

Some modification on the engine:
- took off the air filter and the nozzle cup

- took off the valves

- closed ALL the holes around the engine 

- fixed the spring's end, took off the ball valve from there and closed it with a bolt

- closed with rubber sheet and insulated the piston's head with polystyrene

The piston's maximum stroke is approximately 15mm.

I created a custom/home made passive hot heat exchanger side from flat
aluminium acetone heat pipes.

The homemade modificated heatpipes dimensions: L: 200mm W: 1,2mm H: 5mm

I collected 30 pcs of them with 0,35mm gap between neighboring parts.

Molded the whole HX with two components polyurethane.

That was the biggest pain in the arse...

The engine's free piston is a 100 mm of a simple motocycle's rubber boots. 

This is a simple solution for this stroke limit. 

The self resonance frequency was near by 30-40 Hz, 

so should compress a bit with an adjustable end for the best phase shift.

The regenerator is fine stainless steel mesh.
I collected them with 45˙ degrees different in every layer for the lower heat conduction.
The length was 30 mm
Fixed with bolts, threaded rod, PVC tubes
 and the chiller was ready to use.

Yes it hasn't got cold side HX actually, because it was a prototype! 

But no insulated around the cold side, so it is loaded via the PVC material from the outside. 

The cold heat exchanger will be the next step. I'll update it as soon as possible!

Shematic drawing cross view

Thanks for your attention!

See you soon!

BLADE

Magnetic propulsion drive LTD Stirling

Hi folks!

I made a little LTD Stirling engine with my open source magnetic drive system.

The mechanism works perfectly!

The engine could run fast as a JAXA Stirling,

but actually I created  some mistakes in the construction yet.

The cylinder and the glass piston was sticky somehow!

And the piston movement was limited too.

Anyway...

but the engine started with these bad parameters too!

This gives enormous power to continue my work on my way!

I won give up!

Here is a little video below.

Support my efforts with a simple video sharing, or link sharing on your community site please!

Magnetic Propulsion Drived Stirling Engine (Video)

Hi folks!

Do you remember my very old Stirling engine driving method?

YEP!

Last weekend I found an old but short video from my first prototype 

magnetic propulsion drived HTD Stirling engine.

That was a big suprise, 

I didn't remember any video from this engine!

:)

But here it is!

It was a bad construction, but it worked 4 full stroke and two other. :)

The engine wasn't cooled, so it wasn't a big suprise.

Share this video, and the driving method too

because it is an open source project!

Non patented driving mechanism!

And I believe the Butterfly effect 
also 
the 100th monkey theorys!

My older post HERE.

See You Soon!

BLADE

My new LTD Stirling with this driving mechanism!
HERE!

Self rotating LTD solar heat engine

Hey guys!

I wondered how viable a rotary heat engine with solar energy only.

The temperature different maximum 3 degrees at the moment what this engine use.

But the engine is working only 1 degrees too!

I was suprised in this afternoon when the sun is goes away from the sunflower engine, but that is works well, but slowly. It was a big suprise!

Outside was hot, so the solution was the radiant heat across the window glass what the engine is absorbed and the room was the "cold" side actually. 

Outside temperature was 38 degrees, the room temperature was 35. 

The engine arms moves slowly and somethimes I measured only 

0.8 degrees different between the sides!!!

Also works with angle.

I made a mimic plastic flower at 45 degrees.

And the full shadded one is a pretty unique:

SUPPORT MY EFFORTS WITH A SIMPLE VIDEO SHARING

or

use my paypal button on my YOUTUBE channel!

THANKS!

See You Soon!

BLADE

New DIY tutorial step by step video for a Solar LTD Puskás teeter heat engine

Hi guys,

I have received a lot of feedback via e-mail:

"How do you build it?"

"I need one, send me the parameters please!"

"Cool! Where is the tutorial video Blade?"

I finished with it last night, so the video is arrived!

Share this instructional video with your friends!

That is the primary help what you can do for me!

THANKS!

:)

LTD Puskás heat engine

Hi folks,

here is my new type 

Puskás teeter heat engine!

This is a real LTD heat engine, because the engine works with low temperature different!
The engine start at 3-5 degrees different!
My engine's working range is 27-31 C

The key of the operation is a heat sensitive material.

This material is pretty sensitive for heat.

If we have a curved one then after heated up that material will straight or even concave.

This is a salted peanuts bag's material.

Aluminium base coated with plastic.

The original Puskás water engine is here:

And the Hungarian blog:

Water engine

This engine use moisture for an expansion/contraction effect in paper material.

The paper base is cellulose what really sensitive for humidity.

If we can moisturising one side only than the paper fold in a curve.

The engine was my friend Simi112's (YT name) invention in 2006!

It works with water only.

Pretty suggestive little engine for tabletop.

My version is a real heat engine actually.

When the plastic material heated then 

the sheet from a curved shape goes to the straight

pretty fast!

After when it's cooled down then curved back as originally was.

So the teeter can unbalanced with it too! 

:)

Let's build one! :)

So easy to make!

This is a solar engine too, but it was a cloudy day in Hungary.

I used only a cup of hot water as "sun"!

If the heat different enough to make the unbalancer curves

then the heat engine start freely!

If the shadow, or clouds coming, 

than the engine stop and hold on the start position.

So cool! 

:)

And the real SOLAR LTD version works in sunrise:

Please share these videos with your friends!

Would you need one?

Would you need a DIY instruction video?

Share and vote this movie please!

Follow my blog

also

Subscribe my YT channel!

See You Soon!

BLADE