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Hydraulic and Pneumatic Knowledge
Fluid Power Equipment
Like an electrical storage battery, a hydraulic accumulator
stores potential power, in this case liquid under pressure for future conversion
into useful work. This work can include operating cylinders and fluid motors,
maintaining the required system pressure in case of pump or power failure, and
compensating for pressure loss due to leakage. Accumulators can be employed as
fluid dispensers and fluid barriers and can provide a shock-absorbing
(cushioning) action.
On military equipment, accumulators are used mainly on the lift
equipment to provide positive clamping action on the heavy loads when a pump’s
flow is diverted to lifting or other operations. An accumulator acts as a safety
device to prevent a load from being dropped in case of an engine or pump failure
or fluid leak. On lifts and other equipment, accumulators absorb shock, which
results from a load starting, stopping, or reversal.
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