This is a pump I've been designing for a while. Finally went and hit the 'print' button today. Features: - Proven volute technology. - 1 13/16" dia. 6-blade impeller to create max flow. - Converging/diverging restrictor to increase efficiency. - 16mm and 19mm spaced mounting pattern provides motor flexibility. One thing you'll notice is this pump is quite large. (shown next to a @Tugboat pump for comparison) That's why I call it a battleship pump. I'll later do cruiser and destroyer sizes. I decided instead of having the exit port come out the side I would have it go vertical to hopefully help prevent air-lock problems. We will see. Anyway, here are some photos. Hopefully tomorrow I'll have some flow test to report.
I think it's curved in the wrong direction. You'll need a left hand spanner to fix that : P Can I redeem my points for pump parts?
Very good! I'll be putting the files onto here as soon as I fix a few things. That is unless you need a pump now, I can send you the files. It's usable now, but there are some things that can be perfected.
looking forward to seeing some numbers. i need to get my own testing done of a few things i've got cooked up
Brushless pumps tend to push alot of water, and watts. I use a oil seal on the shaft at the top of the case to keep the water in it and not spray out of the top of the case. Impellers take a beating so the shaft attachment has to be very solid, mine are cut on a CNC mill and weigh 2 grams.
1/8" dubro collar ABS slurried in. It has worked well on all my other pumps, hoping for the same here. Nozzle connection I'm really excited about this pump. I've done a few tests, but full potential hasn't been reached yet. Too much leakage from the top and bottom connection. I'll be applying a gasket tonight for some more tests tomorrow.
For the tests I've been doing, I've used a 450 size 2500kv outrunner on 7.4v. So far, no issues with it bogging down. But, most of the water has gone out the side of the case and not out the outlet, so I might need a bigger motor once I get a better seal.
Not a fan of having to remove 6-8 bolt to get my pump open. Four is plenty adequate, the pump just need a better shiplap.
plastic flexes, you don't have a strong clamping force on the outside of your volutes exit, you really should, or enclose the top in the base. Were I you, I would add another 2mm to the top of the base such that your volute is enclosed at the top as it expands, so you only have the bore for the impeller exposed.
I second Nick's suggestion to add some to the base and add the same amount to the top in the shape of the volute. That way you get a male/female interface which will seal better. I would also suggest making the wall of the base thicker, to give more seal area and make the seal area less prone to flexing. I've used a hose attachment design similar to yours on some of my past pumps and have not been satisfied with its durability. It's possible to make a stronger attachment point by putting it on the base instead of the lid. See example below for ideas.
Yes, I see your point. I'll see about beefing it up and building a better seal. Thanks for the input.
