Dual 3PH Tilt Cylinders--Plumbed In Parallel?

[npalen]

Double post. Sorry.

 

[npalen]

It would use a master cylinder and a slave cylinder. They need to be sized appropriately and the master cylinder has a bleeder in the piston so the system can be phased. This particular application would be different from the typical master/slave setup in that the cylinders would be moving in opposite directions rather than the typical common direction. Tough to design and probably cheaper and easier to use two separate control valves and separate cylinders.

I'm familiar with how the master/slave rephasing systems work but in this case I would think that the two cylinders could be identical size. I would envision the base end of the first cylinder would be connected to the valve. The rod end of the first cylinder would then be connected to the rod end of the second. The base of the second would be connected to the valve's other port.
The oil coming out of the rod end of the first cylinder while it is extending, for example, would retract the second cylinder and vice versa. Right?

Edit: And both cylinders would have to include rephasing bypass capability so the cylinders could be filled with oil initially and then rephased when needed later. Right?

 

[RickB]

Only one would need bypass capability for rephrasing. You are correct in thinking the cylinders would be the same dimensionally, so apart from the rephrasing challenge it would actually be fairly straightforward.

 

[npalen]

Only one would need bypass capability for rephrasing. You are correct in thinking the cylinders would be the same dimensionally, so apart from the rephrasing challenge it would actually be fairly straightforward.

I think you're right, Rick. I was trying to think how to get rid of the air between the rod side of the two cylinders.

 

[countrybumpkin]

Bored are we?

 

[npalen]

Bored are we?

Pretty much. Hydraulics has always been interesting to me and I enjoy sharing ideas with folks of similar interests. Sometimes we endeavor to find solutions for which there is no problem, but that's okay too.

 

[oldnslo]

To really get crazy you could use a valve with float spool option along with master slave and then have maximum tilt and float features. Would require a valve with very minimal spool leakage though to prevent drifting.

 

[countrybumpkin]

I completely agree, it’s good , especially with all the other stuff going on.

 

[RickB]

To really get crazy you could use a valve with float spool option along with master slave and then have maximum tilt and float features. Would require a valve with very minimal spool leakage though to prevent drifting.

In line pilot operated check valves work great. No flow until the opposite hose has pressure supplied to it.

 

[oldnslo]

Agree pilot operated checks prevent drifting but they also prevent float from working