screwed .5 Fluid assisted lift

[bw100007]

Few years ago I was following Webby with his Screwed project and took a step back from the packets and air pressures concepts he was working with.  I wanted to see if there was a way to continuously shift the water right and left and place that on a lever and fulcrum.  Starting with a Archimedes screw pump to shift the water horizontally as the water moves through the tube it always seeks its own level so the energy to move the water is = the rotation of the screw and not the amount of water being moved.   the picture shows the basic idea 1 full wrap on the left is used as a reservoir 1 transfer wrap to shift the water to the right and a 3rd wrap on the right again used as a reservoir.  If the left wrap is pre-filled with water using energy to rotate the screw 1 turn moves the water into the transfer wrap and another full turn on the screw moves the water all the way to the right wrap/reservoir.  reverse the direction 2 full turns and the water always seeking its own level moves back to the left. Adding a 2nd transfer loop not shown in the picture from right to left and this screw becomes continuous and able to rotate in one direction.

[bw100007]

There are some draw backs to the above wrap pattern.  The number of cylinder rotations per cycle (water down and Back) is 4.  When looking at the formula for horse power is HP = Torque X RPM / 5252.  If we were able to reduce the number of wraps we would improve performance.


Another draw back is, It is fairly difficult to manufacture all the wraps on the cylinder.
The water can become segmented into different wraps over time when the water is shifted left to right and the level is oscillating up and down while speed is increased.


The advantage is the entire amount is shifted from left all the way to the right on the lever.

[bw100007]

There is a little trapeze artist that is also the one who sells Balloons at the circus. In fact they sell so many that when she rides her unicycle around the ring she needs to fill the inner tube of the unicycle 1/2 full of water to keep her from floating away.  As she pedals the water flows through the inner tube always remaining in the bottom 1/2 of the inner tube.  The rim of the tires center line is perpendicular to the ground. One day she takes a wrong turn and finds herself going downhill faster and faster and nails a park bench bending the rim of the tire on the pedal and hub assemble at a 45 degree angle.  The top of the rim is now against the left pedal in the top dead center of its stroke.  The bottom of the rim is against the right pedal at the bottom dead center of its stroke.  The bottom 1/2 of the rim from the hub down to the lower right pedal is filled with water.

[bw100007]

Lets pedal the tire 180 degrees.  Looking from the back, as we press down on the left pedal the water starts to seek is own level moving through the inner tube.  As the left pedal moves 180 degrees so now the left pedal is at bottom dead center of its stroke. The rim is now at a 45 degree angle going from the lower left pedal up to the right through the hub and to the right pedal now at its tdc.  All the water is now from the hub and lower left half of the hub.  A full cycle with this configuration would then take anther 1/2 turn to move the water back to the right. 

[bw100007]

In 1 full turn the water shifts from the lower right to the lower left and back.  The power required to do this is the torque to turn the pedals times the number of rotations per cycle/min / 5252. 


The water is never lifted and moved to its different right and left positions.  The screw drive with the fluid assisting by always seeking its own level takes .5 rotations to move from right to left. Thus the name screwed .5 Fluid assisted lift.