hydraulic cylinder design - pressure

[TonyCro]

Hello,

Being moved out of my material comfort zone and into fluids after a job change; and in need of some basic advice.

we have a pneumatic driven oil unit that can develop 700b and a flow rate of 5.3cc/stroke. The cylinder that is being supplies is a double acting design 2" bore and 1" rod dia, to open a 660lb vessel lid and the cylinder is rated to to 200b.

In an effort to reduce the stroke time the supply pressure was allowed to run to maximum - even I know that pressure dies not give speed !


But the question, if the pump is design to give an output of 700b - will the system see that pressure or will only see the the pressure generated by the resistance due to the load ?

many thanks
tony

 

[LittleInch]

A sketch would be useful, but from your description the system would only see whatever pressure it needs to do its job, presumably < 200 bar? (b is not an abbreviation I am familiar with).

The issue will be what stops it going >200 - any relief valves? if it say gets to the end of its stroke or something happens to increase the load or if something blocks the flow (valve?)

difficult to say for definite without a bit more info / sketch /P&ID??

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[KevinNZ]

Unless there a is unusual and fail safe position control on cylinder you will need to design the cylinder for maximum oil pressure the pump or relief valve dictates.