ScoutB said: (quoted from post at 21:46:57 01/14/14) A picture is worth a thousand words. The cylinders can be powered up or down.
Oh - I understood the setup. The point I was trying to make was that the reason it works as you want is that the cylinders are hydraulically locked against each other. And because teh displacements in each end of the cylinder are equal the rods all move the same amount.
But if i have got the physics right (always a big if) the downside is that means the cylinder loads are additive and the hydraulic pressure requirement is the same as if you only had one cylinder lifting the load. You could use 100 cylinders and it would not change the pressure requirement. One calculation is worth a thousand words:
Total load being raised:6000 pounds
Effective piston area of each cylinder: 2 sq in.
Assuming the load to be lifted is evenly distributed across all four rod ends (e.g. 1500#) the hydraulic loading on the individual cylinders is:
C4 = 1500# piston load @ 750 PSI
C3 = 3000# piston load @ 1500 PSI
C2 = 4500# piston load @ 2250 PSI
C1 = 6000# piston load @ 3000 PSI
Agree or disagree?
TOH
This post was edited by TheOldHokie at 07:04:36 01/15/14 5 times.
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