[3DP]MAXi Brushless Battleship Pump

Discussion in 'Construction' started by Beaver, Aug 21, 2016.

  1. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    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. :)
    DSCN2165.JPG DSCN2164.JPG DSCN2162.JPG DSCN2160.JPG DSCN2156.JPG Brushless Pump v1.png
     

    Attached Files:

    Last edited: Aug 21, 2016
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  2. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    Free points to the person that can tell me the problem with the impeller. :)
     
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  3. Xanthar

    Xanthar Well-Known Member

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    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?
     
    Last edited: Aug 21, 2016
  4. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    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. :)
     
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  5. NickMyers

    NickMyers Admin RCWC Staff

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    Lol. My first impeller and pump body design were also in need of the left hand spanner
     
  6. NickMyers

    NickMyers Admin RCWC Staff

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    looking forward to seeing some numbers. i need to get my own testing done of a few things i've got cooked up
     
  7. NickMyers

    NickMyers Admin RCWC Staff

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    are you gluing in a wheel collar for the impeller - shaft connection?
     
  8. thegeek

    thegeek Well-Known Member

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    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.
     
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  9. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    1/8" dubro collar ABS slurried in. It has worked well on all my other pumps, hoping for the same here.

    Nozzle connection
    image.jpeg

    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.
     
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  10. Nate G

    Nate G Well-Known Member

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    bring it to the battle this weekend
     
  11. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    Won't be coming, Nate. Sorry :(
     
  12. Maxspin

    Maxspin -->> C T D <<--

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  13. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    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.
     
  14. NickMyers

    NickMyers Admin RCWC Staff

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    moar boltses
     
  15. Lou

    Lou It's just toy boats -->> C T D <<-- Admiral (Supporter)

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    Tim Allen approves this message
    [​IMG]
     
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  16. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    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.
     
  17. NickMyers

    NickMyers Admin RCWC Staff

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    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.
     
  18. rcengr

    rcengr Vendor

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    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.
    printed pump.jpg
     
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  19. NickMyers

    NickMyers Admin RCWC Staff

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    This is a pump i was playing around with earlier this year
    20160825_164200.jpg 20160825_164211.jpg
     
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  20. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    Yes, I see your point. I'll see about beefing it up and building a better seal. Thanks for the input. :)