What is a hydraulic accumulator primarily used for?

A hydraulic accumulator serves a critical role in hydraulic systems primarily by maintaining constant pressure. When pressure decreases in the system, the accumulator releases stored energy, which helps sustain the required pressure for optimal operation. This function ensures that hydraulic systems can perform effectively, especially during peak demand situations where additional fluid may be needed to compensate for transient pressure drops.

While storing hydraulic fluid is part of an accumulator's capabilities, the more significant aspect of its operation is its ability to deliver this stored fluid under pressure, thereby helping stabilize the system's pressure. Filtering impurities and regulating flow rates are functions typically associated with other components within a hydraulic system, such as filters and flow control valves, rather than the primary purpose of an accumulator. Thus, focusing on the maintenance of constant pressure highlights the accumulator's vital contribution to the efficiency and reliability of hydraulic operations.