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The biggest difference between piston and bladder accumulators

Piston and bladder accumulators are two common devices used to store hydraulic energy in hydraulic systems, and the biggest difference between them is their operating principle and structural form.

1.Piston accumulator:

Working Principle: Piston accumulators store energy by compressing a piston in an airtight container by means of hydraulic fluid. When the hydraulic oil is pressed into the accumulator, the piston will be compressed by the pressure, and the energy will be stored in the compressed gas or spring.

Form of construction: A piston accumulator usually consists of a container, a piston and a spring or gas cushion. When compressing hydraulic fluid, the piston moves and stores energy in the spring or gas cushion.

2.Skin bladder accumulators:

Working Principle: Skin bladder accumulators utilize a membrane bladder made of soft rubber or elastic material to store hydraulic energy. When the hydraulic fluid is pressed into the accumulator, the membrane capsule will be expanded to store energy inside the capsule.

Structural form: The bladder accumulator consists of a container and a soft membrane bladder. When hydraulic fluid is pressed into the container, the membrane sac will be expanded to store hydraulic energy.

The main difference is that piston accumulators use a piston to compress a gas or a spring to store energy, whereas skin bladder accumulators utilize a soft membrane bladder to store energy. This leads to differences in construction, capacity and application. Piston accumulators are typically better suited for high-pressure, low-capacity applications, while bladder accumulators are better suited for high-volume, low-pressure applications.

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