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What are the functions of accumulators in hydraulic systems? How to choose the right one?

2025-04-28

Accumulators have multiple functions in hydraulic systems: short-term large-volume oil supply to supplement the insufficient flow of axial piston pumps and meet periodic peak demand. Absorb pressure pulsation and reduce pipeline vibration and noise, especially for multi-cylinder pump systems. Emergency energy to provide emergency operating power when the pump fails. Leakage compensation to maintain system pressure stability and reduce frequent pump starts and stops. When selecting an accumulator, consider: Working medium - usually a bladder accumulator is selected, which has good compatibility with mineral oil. Capacity - the required effective volume is calculated according to the purpose, emergency use is calculated according to the actuator action requirements, and pulsation absorption is selected according to 1-2 times the pump single-turn displacement. Pressure - the pre-charge pressure is generally 60-70% of the system's minimum working pressure, and the maximum working pressure does not exceed 90% of the accumulator's rated pressure. Installation location - pulsation absorption should be close to the vibration source, and emergency use should be close to the actuator. In addition, temperature effects, installation space and maintenance convenience need to be considered.

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Hydraulic Axial Piston Pump

Construction Machinery Piston Pump

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Bent Axis Piston Motor

Variable Axial Piston Pump

Fixed Displacement Piston Motor

Hydropower Plant Hydraulic Cylinder

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What are the functions of accumulators in hydraulic systems? How to choose the right one?

What are the functions of accumulators in hydraulic systems? How to choose the right one?