hydraulic accumulator

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Related to hydraulic accumulator: hydraulic intensifier

hydraulic accumulator

[hī′drȯ·lik ə′kyü·myə‚lād·ər]
(mechanical engineering)
A hydraulic flywheel that stores potential energy by accumulating a quantity of pressurized hydraulic fluid in a suitable enclosed vessel.

Hydraulic accumulator

A pressure vessel which oper-ates as a fluid source device or shock absorber. It is used to store fluid under pressure or to absorb excessive pressure increases. The hydraulic accumulator is an energy-efficient component, which allows the use of a smaller pump to achieve the same end results in terms of cylinder rod actuation speeds. In certain circuit designs, the accumulator will permit a pump motor to be completely shut down for an extended period of time while the accumulator supplies the necessary fluid to the circuit.

The operation of the hydraulic accumulator is induced by a pressurized gas (usually nitrogen), a spring, or a weighted plunger. The accumulator supplies fluid for actuator movement or to replace fluid lost by leakage. The gas-charged accumulator and the spring-type accumulator discharge their fluid into the system at pressures which are decreasing as the gas or spring expands. The weighted accumulator allows stored fluid to be discharged into the system at a constant pressure for the entirety of its downward stroke. See Control systems, Hydraulics, Pump

References in periodicals archive ?
BorgWarner supplies multi-segment wet friction plates, hydraulic accumulators and Eco-Launch(TM) solenoid valves for GM's new Hydra-Matic 8L45 automatic transmission.
The front wheels of the tractor are connected to a spring-loaded ball via the pistons of a hydraulic cylinder which serves as a hydraulic accumulator.
Janus SE combines a variable-speed electric pump motor and a hydraulic accumulator.
Tenders are invited for Supply of Spare blader for hydac make hydraulic accumulator model no.
GreenLine manages the hydraulic accumulator to fill only to the required level, thereby using the minimum pump capacity, and avoids parallel movements when not needed.
Charging of the hydraulic accumulator is dynamically regulated, meaning that the pressure level is automatically adapted to the actual demand, so as to use the minimum required pump capacity.
Tenders are invited for Supply of Hydraulic accumulator bladder & seal kit .
Standard features: Clamping by servo-controlled variable-volume pumps and hydraulic accumulator for fast lock-up time.
Taiwanese builder of injection machines: HRN series of toggle presses from 100 to 400 tons; HDC coinjection models with rotary table, 140 to 500 tons; and HRQ hydraulic accumulator models from 140 to 400 tons.
VIII - the supply of hydraulic accumulator type BLH-3-300 helicopter W-3 - 4 pieces;
These two-platen units feature AC vector-driven single or dual extruders, combined with two-stage hydraulic accumulator injection.