I'm on Mr. Novus' thread
https://overunity.com/19459/buoyancy-calculations-making-use-of-an-exception-to-archimedes-principle/

I studied and discussed buoyancy and sealing issues.
And from that, I thought about the structure of change.
Because is no longer a 'use of an exception to Archimedes'
So build another thread.

About calculating buoyancy, here it is simpler and more clear .
Fixing sealing problems may also be easier.

Figure 1 is an overall block diagram.

Among them, a string of pontoons to the left of the sprocket,
immersed in water, gets buoyancy and will rise.

A string of pontoons on the right, in a tube.
The upper mouth of this pipe is above the surface of the water.
The lower mouth of the tube is sealed.
Ideally, there is no water inside the tube, it is air.
A string of pontoons on the right did not get buoyancy .

So, the key is how the pontoon passes through the sealing mechanism
at the lower mouth of the tube,
keeping only air in the tube.

Figure 2 is a pontoon.
The middle part of the pontoon is a sealed air tank.
The parts of the pontoon that extend beyond the air tank
at both ends are made into a crown tooth shape.
There are chains connected to pontoon strings.

Figure 3 is a possible seal drive mechanism.

If it is assumed that the pontoon is a continuous tube
that goes down from the lower mouth of the air tube,
it may be easier to achieve.
But the tubular pontoon does not get much buoyancy
on the left side of the sprocket.

So the pontoons have to be made section by section.
Such a pontoon passes through the donut sealing mechanism
and there will be a large diameter change that makes sealing difficult.

Figure 2 Such a pontoon with Group edge teeth
Two pontoons up and down can form the shape of a tube.

Two continuous pontoons go through the donut sealing mechanism,
there is no diameter change, and the sealing is much simpler.

Donuts are made of suitable elastic materials.
When the pontoon passes through the doughnut,
the donut flattens a length outside the pontoon wall.
This section is press to the extent that it exceeds the length
of the crown teeth at the pontoon junction and will not leak.

The buoyancy of a string of pontoons to the left of the sprocket,
enough to pull the pontoons out of the doughnut .
But then the two pontoons that are going to pass through
the donut cannot be connected into a tube.

Therefore, by asking the donut to actively rotate itself,
it is possible to make two pontoons pass continuously
at the donut without separating.

After the pontoon passes through the doughnut,
it separates and reaches the state of chain straightening.

This requires the donut to rotate and phase in sync with the large sprocket.
It is easy to achieve using electronic control technology.

The doughnut and the red shell are also closely matched and do not leak.
Many blue drive wheels drive the donut to spin.

The deeper the left pontoon string is underwater, the more power it gets.
This depth is determined by the sealing performance of the doughnut.

Donut sealing mechanism may seem complicated, but it is more than use of an exception to Archimedes'
It is much easier to seal in a long strip.

Thank you
panyuming

  I improved it again.

The connection of the pontoon was changed to the hinged method.
A small magnet is added to the pontoon to compensate for the eccentric moment.
The blue drive wheel was removed, and the buoyancy
on the left side of the sprocket pulled the pontoon down through the doughnut.
Removed the starting water pump. The upper sprocket is actively
rotated at start-up to drain water from the lower part of the air pipe.

Many layers of rubber rings spacer gaskets make up a sealed doughnut.
It does not require high precision.
Unlike the application of boat shafts, some water leakage is allowed here.
The amount of water leaking is less than the amount brought out between the pontoons,
and the water in the air pipe will remain at the level controlled by the valve.
Design the shape of the pontoon, you can adjust the amount of water carried out from the pontoon gap.

Therefore, the processing is much simpler.

  This system can be used on ships that do not need fuel to sail forever.

 
* Simple pontoon structure.doc

The pontoon structure was improved.

In order to speed up the pontoon running line speed,
the two ends of the pontoon should be made into a conical shape to reduce the resistance of the pontoon in the water.
In this way, the hinge is placed on the axis line of the pontoon,
so that the pulling pontoon has no eccentric moment, eliminating the hook for balancing the torque,
The pontoon structure was also simplified.

The pontoon in Figure 7 is made of PVC finished pipe, the size is mm,
and the air volume in the pontoon is slightly greater than 5 liters.

 
Stay in the future Waterworld

A very nice study in buoyancy, I think.

Thank you Willy for joining the discussion.

The mass (weight) of each pontoon's own structure is the same.
There are as many pontoon skewers on the left as there are pontoon skewers on the right.
They are balanced to the sprocket center.
So just calculate the difference in the number of pontoons on the left and right sides in the water,
and then calculate the volume of air in the pontoon of the difference,
and the buoyancy value is obtained.

So buoyancy has nothing to do with the mass of the pontoon.

The force required to pull the pontoon down from the sealing ring is divided into two parts.
one Part is the upward buoyancy of the water on the bottom surface of the pontoon.
This force is roughly balanced by subtracting the buoyancy of one pontoon on the left.
The fatal mistake I designed could be here.

The other part is the friction of the pontoon with the sealing ring.
This friction force is mainly related to the difference between
the hole diameter of the sealing ring and the interference fit of the pontoon diameter,
the material elasticity of the sealing ring,
the lubrication between the sealing ring and the pontoon,
The number of layers of the seal，
and the pressure of the water depth.

Minimize the interference fit between the sealing ring and the pontoon,
minimize the number of layers of the sealing ring,
and try to use materials with good elasticity, which minimizes these frictions.

The total effect: the rate at which water leaks from the bottom of the seal
into the air pipe is lower than the speed at which the pontoon
carries water out of the air pipe at the rated operating speed.
It works well.

I won't calculate any of that.  
I just feel that it can be done, the friction is less than the buoyancy of one pontoon.
So I put the total loss at 37%, which should have margin.

I used to think that buoyancy machines would get a lot of buoyancy.
After roughly calculating this machine, I don't think it's worth actually making.
Because the output/size ratio is too small.
Probably because the speed that can be achieved is not high.
The higher the operating speed of the pontoon, the greater the output, and the smaller the effective buoyancy.

Although this buoyancy machine may be a free energy device.
But it is not as practical as using solar panels or wind turbines plus battery systems.

Thank you!

he force required to pull the pontoon down from the sealing ring is divided into two parts.
one Part is the upward buoyancy of the water on the bottom surface of the pontoon.
This force is roughly balanced by subtracting the buoyancy of one pontoon on the left.
The fatal mistake I designed could be here.

Correct. The force is the pressure at the depth. It is not countered by the pressure on the top surface of the pontoon, so it will be significantly more. Sorry, but here is no advantage to your design.