Advanced HydraulicsAdvanced HydraulicsDon GillilandDon Gilliland

Hydraulic ComponentsReservoirsAccumulatorsPumpsValvesActuatorsConductors

Hydraulic ComponentsAccumulator Functions

Energy StorageStabilize Pump PulsationStabilize Load ShocksStoreVolumeUnderPressure

For High Volume Demands

Hydraulic ComponentsAccumulators

What You Don't Know About Hydraulic Accumulators Can KILL You! Click Below For Video

https://www.youtube.com/watch?v=-oXh3FILZdg

Gas Accumulator Pressure Test https://www.youtube.com/watch?

v=6e8ZVCKCO1U

Hydraulic ComponentsAccumulator Types

Spring Loaded Gas Charged (Nitrogen)Weight LoadedHydraulic Counter Loaded

Accumulator TypesSpring Loaded Types

Sealed PistonPiston may be sealed with an O-ring, quad ring, or square ring and may even be backed up with a Teflon cushion washer depending on pressure requirements of system and spring strength

Accumulator TypesSpring Loaded Types

Sealed PistonCompound Spring

This accumulator system is often used for variable loads or independent pressure volumes for light load extensions in sequential operation

Accumulator TypesSpring Loaded Types

Sealed PistonCompound Spring Diaphragm The sprung side may be pneumatically boosted

Accumulator TypesSpring Loaded Types

Sealed PistonCompound Spring Diaphragm Hydraulic Counter Loaded

Notice: 2 different size pistons allowing for mechanical advantage boosting that are balanced by 2 springs working against each other (learn the math!!)

Accumulator TypesSpring Loaded Types

Sealed PistonCompound Spring Diaphragm Hydraulic Counter LoadedSpring with Bellows

Review Spring TypesSpring Loaded Types

Sealed PistonCompound Spring Diaphragm Hydraulic Counter LoadedSpring with Bellows

Hydraulic ComponentsAccumulator Types

Spring Loaded Gas Charged (Nitrogen)Weight LoadedHydraulic Counter Loaded

Accumulator TypesGas Charged Types

Bladder TypeDiaphragm TypeSealed Piston TypeMetal Bellows TypeUsually Nitrogen (Nuetral)

Accumulator TypesGas Charged Types

Accumulator TypesGas Charged Types

Hydraulic ComponentsAccumulator Types

Spring Loaded Gas Charged (Nitrogen)Weight LoadedHydraulic Counter Loaded

Accumulator TypesWeight Loaded Types

Sealed Piston Type

Accumulator TypesWeight Loaded Types

Usually Piston TypeLoad Used for Stabilization in Construction Equipment

Early HydraulicsAdditional Readinghttp://hsc.csu.edu.au/engineering_studies/

application/lift/3377/hydraulics.htm

Weight Loaded AccumulatorAn elevated load acting on Loader Bucket Cylinders can be

used as an accumulator to be used to control ancillary systems on

this machine

Hydraulic ComponentsAccumulator Types

Spring Loaded Gas Charged (Nitrogen)Weight LoadedHydraulic Counter Loaded

Accumulator TypesHydraulic Counter LoadedSealed Piston Type

This Hydraulic Counter Loaded Sealed2 size Piston Accumulator is Used to Multiply Volume or Pressure Needs for Various Transmission Actuators

Hydraulic ComponentsAccumulatorsReviewNext Pumps

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