An accumulator is a device that allows a hydraulic system to store oil, under pressure, for an extended period of time.
Precharge: The pressurized gas in the accumulator.
Charge: The hydraulic fluid in the accumulator.
Accumulators come in two basic types.
Each type of accumulator has its own advantages, and a few shortcomings.
A bladder type accumulator, sometimes known as a hydro-pneumatic accumulator, is a metal tank that contains a rubber bladder filled with compressed gas. There is also a poppet valve in the discharge port and a gas valve used to precharge the bladder.
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