Hydraulic piston accumulators. How do they work?

Hydraulic piston accumulators. How do they work?
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Posted by: swooch ^®

11/14/2007, 05:55:57

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Hi, I cannot find any description except the very short one at wikipedia.

I know theres a cylinder with a gas on one side wich compresses. But how does the pre-charge work? Is there some kind of stopper, that keeps the end of the piston from going to far out, and thus preventing the pressure from spreading to he rest of the system?

|
|_ | _|
|____|___|
| |
|___gas__|

Here's how I envision it. (F*A here exceeds pre-charge pressure, depressing the piston.) Hope the ASCII-art survives formatting. EDIT: turns out it didn't. Perhaps it's possible to recreate it for the interested reader.

Thanks in advance.

Modified by swooch at Wed, Nov 14, 2007, 05:57:25

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: Hydraulic piston accumulators. How do they work?

: Hydraulic piston accumulators. How do they work? -- swooch Post Reply Top of thread Forum

Posted by: Kelly Bramble ^®

11/14/2007, 08:02:43

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Look on the folowing web page towardsa the boootm for accumulator stuff -> /hydraulic_fluid_flow_menu.shtml
In general, the piston will contact the wall of the accumulator housing when either the gas pressure exceeds the hydraulic pressure or the hydraulic pressure exceeds the gas pressure. Keep in mind that the gas pressure increases as that side of the piston is compressed. Normally, the precharge (for a diaphram accumulator) is one half the normal operating pressure of the hydraulics.

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: Hydraulic piston accumulators. How do they work?
: Hydraulic piston accumulators. How do they work? -- swooch	Post Reply	Top of thread	Forum