Piston Accumulators

What is Piston Accumulators

Piston accumulator works as an energy saving and releasing device that is designed to save and release hydraulic energy. Besides, it can also absorb pressure surges, dampen pulsation and smoothen volume flow rates by the method of compressing nitrogen.

This device works under the concept of internal hydraulic pressure changing. When the piston accumulator is not storing hydraulic fluids, the nitrogen would full of the accumulator instead of just empty them, and the piston would position near the oil port valve.

When the energy storage demand is required, the hydraulic fluid would flow into the accumulator and increase the hydraulic pressure inside the accumulator. Then, the piston in it would be pushed and then press the nitrogen out for more space to store the hydraulic fluid.

When it is required to release the hydraulic energy, the piston would be pushed by the nitrogen and then press the hydraulic fluid out for creating powerful hydraulic energy.

Piston accumulators are designed mechanically that can work continually day and night in high efficiency in limited spaces or even under extreme environments.

Piston accumulators would not require much maintenance that they can in some level reduce the cost.


Structure of Piston Accumulators

Described according to its appearance and shapes, the piston accumulator looks just like a metal bottle. Also, as the previous section described, the working principle of the hydraulic energy saving device is simple. It would be easy to see that the structure of the piston accumulator is simple and is consistent with less parts.

However, the parts of a piston accumulator are surprisingly many:
● Accumulator Shell
● Piston
● Screwed End Cap Gas Side
● Gas Filling Valve
● Screwed End Cap Oil Side
● Thread Ring
● Connection Oil-Side
● End Cap Seat
● Screw Plug

Through the cooperation of the parts, the piston accumulators have successfully made themselves valuable to the market.


Features of Piston Accumulators

Piston accumulators, as one of the excellent energy saving devices, contain a plenty of features which provide them a place on the market. Same as other assisting devices do, these features would finally lead to the result of either cost saving or productivity increasing, or even both.

Below are the features that value the piston accumulators:
High Efficiency
By the special design of changing diameter or length, the piston accumulators can perform in high efficiency and optimize its application. Through this motion, the energy saving efficiency would be increased.

Monitoring System
It is possible to monitor the quantity of the gas in the piston accumulators by the piston position while using the piston accumulators to store the hydraulic energy.

Multiple Installation Position
The position of the piston accumulation for installing is not limited. The users can install the piston accumulator anywhere they require the accumulator to be.

Total Discharge
It is possible to take out the piston accumulator entirely.

Sealing System
The sealing system can reduce the friction and contains long lifespan. Moreover, it is suitable for different kinds of operating liquids, wide temperature range and applications.

Maintainable Design
The structure of the piston accumulator is simple so that it would not be too difficult to maintain.

Less Gas leaking
Compared with other kinds of accumulators, piston accumulators can prevent gas leaking problems because the sealing areas are smaller.

High Dynamics
The piston inside the accumulator is not heavy enough that it can help to increase the dynamics.

Larger Connection Cross-Section
The piston accumulator contains a larger connection cross-section that can ensure the stability of the device.

Hardly to be Broken
The structure of the piston accumulator is simple and strong that in case of failure, the gas inside the accumulator would not be abruptly lost or leaked.


Work with Piston Accumulators

Piston accumulators are used to store and release hydraulic energy. When the piston accumulators are “empty,” the nitrogen would fill the accumulators.

Under that situation, there would also be some hydraulic fluids between the piston and the oil port valve for preventing the piston from hitting the wall of the accumulator directly.

When the piston accumulator is required to store the hydraulic energy, the pressurized hydraulic fluid would flow into the accumulator through the oil port valve and compress the nitrogen in it, then push the piston to create more space for the hydraulic fluid.

The less the nitrogen is, the more the hydraulic energy will be stored.

When releasing the hydraulic energy, the pressure inside the accumulator would be decreased, and the piston would be pushed by the nitrogen and get the space back to it. Thus, the hydraulic liquid would be pushed out of the accumulator and release the hydraulic energy.


Application of Piston Accumulators

Piston accumulators, as an excellent device for hydraulic energy saving and releasing, are welcomed by various fields that include but not limit with:
● Energy Storage
● Pulsation Damping
● Volume Compensation
● Hydraulic Springing
● Shock Absorption
● Media Transfer Partition
● Emergency Operation

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