Spherical Bearing Engine

Discussion in 'Plans' started by vederstein, Mar 10, 2019.

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  1. Mar 10, 2019 #1

    vederstein

    vederstein

    vederstein

    Must do dumb things....

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    I wanted to create a steam engine that, as far as I know, has no real world analogue or has been done before.

    It's still a work in progress, but I submit my first concept. At this stage, I haven't even looked at the valving....



    Assy, Baseplate- 01.jpg Assy, Baseplate- 02.jpg Assy, Baseplate- 03.jpg Assy, Baseplate- 04.jpg
     
  2. Mar 22, 2019 #2

    Anatol

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    Interesting idea.!
    I too have been working on designs for horizontally opposed engines without crankshaft. Trying avoid the pitfalls of the scotch yoke, which is a great idea in terms of reducing moving parts but has serious mechanical impediments.

    The first issue I see with your drawing/video is that the bearing on the flywheel is cylindrical. Is this where the spherical bearing comes in, but your 3D package didn't have one?
    You could make a pivot for the box the bearing is sliding in.
    OR !put the bearing on the end of the bar and cut a conic section track in the flywheel! This would also allow you to support the flywheel with bearings on both sides.

    I see you've introduce a transverse slot in the piston rod to account for the arc of the driven pin. A vertical pin in the piston rod running in a slot in the oscillating bar might be more efficient?

    Regarding valving, I think might be able to utilize the oscilating bar to come up with some interesting rod actuated piston valving, :)

    I look forward to future installments, good luck!
     
  3. Mar 24, 2019 #3

    vederstein

    vederstein

    vederstein

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    I spent much time trying to make an oscillating bar work but I finally realized it's mechanically impossible without additional cams. So that's way I somewhat did as shown in the following video.

    As for the spherical bearing, It's hard to see in the video, but the spherical bearing does swivel in the cad model. In the end, I don't know if this design has a chance in hell to run, but it's been a fun design/CAD modelling exercise.

    I realize that the flywheel is highly unbalanced. I need to look at resolving that.

    Being that this engine is almost entirely cam driven, I think I'm going to rename it from "Spherical Bearing Engine" to "Camgine!" (For some reason, I think it requires the explanation point)

    As with my previous designs, I'll post all design information (drawings, cad models, etc) after the thing is done and issues resolved.

    ...Ved.

     
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  4. Mar 24, 2019 #4

    john_reese

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    Pillow block bearings have a spherical OD. That should work fine in your application. SKF bearings with the barrel shaped rollers could also work but are probably not made in small enough sizes for model work.
     
  5. Mar 25, 2019 #5

    johnmcc69

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    Hey Ved, very nice work on the CAD animation, it's a bear just doing the design & you well know how hard it is to pull it off.

    Very nice work.

    John
     
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  6. Mar 25, 2019 #6

    TonyM

    TonyM

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    Spherical roller bearings are designed to allow for axial misalignment and would work but self aligning pillow blocks are designed for small misalignment between the shaft axis and the plane of the bearing mount. The spherical element is not designed for continuous movement / wear.
     
  7. Mar 25, 2019 #7

    vederstein

    vederstein

    vederstein

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    I already have the spherical bearing. It was am EBay item and therefore I designed the engine around it. The bearing is a 1204 for those that care.

    I have four of them, so I have no idea what to do with the other three.

    ...Ved.
     
  8. Mar 25, 2019 #8

    davidyat

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    Ved,

    Not fair. I’m not done with your 2 Cylinder, double action engine yet. Stop making me more interested in this one. Kidding aside, this looks like my next one from you.

    Grasshopper
     
  9. Mar 25, 2019 #9

    vederstein

    vederstein

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    David,

    Don't get too excited yet. Give me 5 or 6 months to build this damn thing and see if it even works.

    This is a risky design.

    ...Ved
     
  10. Mar 25, 2019 #10

    davidyat

    davidyat

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    Probably take me about 4 to 5 months to finish the 2 cylinder.
    Grasshopper
     

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