What is the purpose of a hydraulic accumulator?

A hydraulic accumulator serves the essential purpose of storing hydraulic energy and maintaining pressure within a hydraulic system. This component accumulates hydraulic fluid under pressure, which can be released when needed to assist in system operation, improve efficiency, and protect against pressure fluctuations. By acting as a reservoir for energy, it allows for the smooth operation of hydraulic machinery and provides a rapid response during peak demands or sudden changes in load.

Moreover, in situations where the hydraulic source may be temporarily inadequate, the stored energy can be utilized to maintain system pressure, effectively ensuring operational stability. This capability is crucial in applications where consistent pressure is required for efficient performance, such as in hydraulic lifts, presses, or other machinery relying on hydraulic power.

In contrast to the other choices, filtering hydraulic fluid, measuring hydraulic pressure, or draining excess fluid, are functions associated with different components within a hydraulic system rather than the primary role of an accumulator.