hydraulic cylinders in parallel

[Jari]

I have two hydraulic cylinders (identical) connected in parallel that I will call a and b.
I would like to know if something changes between the two following ways.

1) not symmetrical
the cylinder a is powered directly by the mandate while the cylinder b is powered by a "t" that intercepts the fluid (oil) from the cylinder a.

2) symmetrical
the mandate immediately encounters the "t" and therefore symmetrically breaks in the two cylinders with identical geometry (both elbows, same length tubes, same load losses).

Maybe for many it will be a children's game but I find myself in trouble.
Is it not true that parallel users are subject to the same pressure ?
because the practical experience makes me suppose that it is always wise to symmetry as much as possible the hydraulic circuits.

 

[cacciatorino]

I have two hydraulic cylinders (identical) connected in parallel that I will call a and b.
I would like to know if something changes between the two following ways.

1) not symmetrical
the cylinder a is powered directly by the mandate while the cylinder b is powered by a "t" that intercepts the fluid (oil) from the cylinder a.

2) symmetrical
the mandate immediately encounters the "t" and therefore symmetrically breaks in the two cylinders with identical geometry (both elbows, same length tubes, same load losses).

Maybe for many it will be a children's game but I find myself in trouble.
Is it not true that parallel users are subject to the same pressure ?
because the practical experience makes me suppose that it is always wise to symmetry as much as possible the hydraulic circuits.

If your intention is to move the cylinders in synchronous, you only have two roads:

1) use a flow divider

2) mechanically connect the two stems (hard bar, pinion+cremagliere + twist bar, etc)

This is because, even if you make the most symmetrical system in the world, you'll always have difficulties in synchronization due to friction: Basically, the oil will go first into the lower-strength chamber (e.g., the smoothest cylinder) and then fill the room with higher resistance.

If you just have the same pressure in the two cylinders, both alternatives are fine, always that the dynamics of your system are not extremely fast.

 

[Jari]

in this case it is not necessary synchronism.
Thank you for the answer!