Pump Project Kawasaki

Discussion in 'Research and Development' started by SteveT44, May 22, 2018.

  1. SteveT44

    SteveT44 Well-Known Member

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    Something new coming out of Tyng Labs. Lets see if a water pump impeller from Kawasaki 250 can be the basis for a kick ass bilge pump.

    No flimsy resin molded or 3D printed stuff here. Cast and machined aluminum and designed like a centrifugal pump impeller should be!

    upload_2018-5-22_12-10-27.png


    I modded the impeller, shortening the blade height, sacrificing flow for higher pressure. Still working on the hub bit. It's a bolt through drilled to 1/8".

    upload_2018-5-22_12-4-1.png


    Will get started on the case shortly.

    ...
     
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  2. NickMyers

    NickMyers Admin RCWC Staff

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    well this should be interesting

    +1 subscription to your newsletter
     
  3. SteveT44

    SteveT44 Well-Known Member

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    Started fabbing the case. The case is machined out of a laminated block of PVC plastic lumber.

    The 1/4" outlet tube press fits into the case. I'm trying to get minimal ID changes as possible to get as smooth a flow from the case to the restrictor.

    upload_2018-5-25_6-34-39.png


    upload_2018-5-25_6-34-58.png


    Flattened the hub nut

    upload_2018-5-25_6-35-21.png


    Drilled and tapped the setscrew hole

    upload_2018-5-25_6-35-34.png


    The business end

    upload_2018-5-25_6-35-44.png


    The impeller is tapered on the bottom. I chucked it up in the drillpress and used it to drill out the bottom of the 1 1/2" hole for a perfect fit.

    upload_2018-5-25_6-35-56.png

    ...
     
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  4. SteveT44

    SteveT44 Well-Known Member

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    Almost done. Just a few more bits to finish up.

    pump2.jpg pumpt1.jpg pump3.jpg
     
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  5. Beaver

    Beaver 2020 Rookie of the Year Admiral (Supporter)

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    I'm looking forward to the data! :woot:
     
  6. SteveT44

    SteveT44 Well-Known Member

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    We will see. I think the 1.5" impeller may be a bit to much for the RS555 motor. If it seems to be under performing, I'll machine a 5mm hub for it and mount an RS775 motor and test.
     
  7. Kevin P.

    Kevin P. Well-Known Member

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    Wait, Steve found an application where the RS555 isn't ideal? I'm assuming you tested up to 1,000V, right?
     
  8. SteveT44

    SteveT44 Well-Known Member

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    Pumped some water today. Pushed a gallon in 32 seconds so right now I'm calling this a 2GPM pump. That was through a plain jane restictor though. The motor sounded a little bogged but it didn't get hot, warm, but not hot. I have an amp meter coming in the mail this week so I'll be able to get some real testing done. Will also have a better restrictor for the next test. One nice thing with this pump was that it primed in a 1/4" of water and sucked that container practically dry before losing suction.

    upload_2018-5-28_15-39-57.png
     
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  9. SteveT44

    SteveT44 Well-Known Member

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    Hmm...

    upload_2018-5-29_7-50-42.png
     
  10. SteveT44

    SteveT44 Well-Known Member

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    Well, I tested the new pump against my current Barham pump. Both pumps have the same motors. Turns out my old pump does pretty well. It pumps a gallon 3 seconds faster than the new one and uses half the current (2A vs 4A). Go figure. I do like the nozzle on the new pump though. It has a better stream. Think I'll make a copy and adapt it to the old pump to see if it improves it. On the new pump, I'll try a 755 motor on it next.

    upload_2018-6-8_14-17-33.png
     
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