A repository of 3D print STL sources

[rob.mwpropane]

Well I think it's awesome. If Vance can use whiffle balls I'm pretty sure just about anything would help in disrupting the flow enough to get a mix.... and honestly who cares. I get that there may be more efficient designs, but if I tie 3-4 of these together in an 18"-24" housing I'm pretty sure it'll work.

You might be right, a more efficient design could be shorter, but it also costs a lot more money. I don't think most people care about short....

 

[James79]

Would it be a good idea to make a mirror image of half the sections to get better mixing in which case just push together would be easier.

Planning on mirroring, I'll do 3 STL's.... a push together that can be mirrored in the slicer, and part a (right handed) and part b (left handed) threaded

Just my opinion, but I don't think that design will work as well as you may like it to. I've seen quite a few designs along this path and some of the better ones have designs that split the airflow paths, and your design seems to be 2 opposing spirals without any path splits. Just doesn't seem like it would make enough turbulence to really get the 2 (or more) gasses to mix.

I very much appreciate constructive criticism! I agree, and plan on doing mirrored sections, alternating.

Respectfully,

James

 

[James79]

Standard disclaimer: This has zero testing or math applied... not intended for actual use, purely a thought exercise. Print at own risk.

Friction fit version (.5mm tolerance) 50 mm diameter, 150 mm working length (center post goes to 170 mm for 20 mm overlap in the base of next segment). Recommend mirroring in slicer to do alternating directions.

Respectfully,

James

 

[grf88]

Thankyou for your efforts in this. Much appreciated.

 

[rob.mwpropane]

Standard disclaimer: This has zero testing or math applied... not intended for actual use, purely a thought exercise. Print at own risk.

Friction fit version (.5mm tolerance) 50 mm diameter, 150 mm working length (center post goes to 170 mm for 20 mm overlap in the base of next segment). Recommend mirroring in slicer to do alternating directions.

Respectfully,

James

Looks amazing. I can wait for the others to come out. I'd like to line them up and see what'll work. I really appreciate your efforts.

My splicer say's $1.27 @ 50% infill and 20% support infill;

 

[James79]

Same disclaimer, threaded version

 

[James79]

Looks amazing. I can wait for the others to come out. I'd like to line them up and see what'll work. I really appreciate your efforts.

My splicer say's $1.27 @ 50% infill and 20% support infill;

Just a warning, the vanes are only 2mm thick.... I don't know how well the supports are going to play out. This was a quick and dirty design with no real effort to optimize for print-ability.

 

[rob.mwpropane]

Just a warning, the vanes are only 2mm thick.... I don't know how well the supports are going to play out. This was a quick and dirty design with no real effort to optimize for print-ability.

I guess I'll let you know

Edit: they look great

 

[rob.mwpropane]

I guess I really don't need supports with it spiraling up, yeah?

Edit: printing both without supports will cost.....exactly $0.99

 

[rob.mwpropane]

I'm having an issue after slicing where there's "air gaps" in the model.

Any ideas?