nyomásfenntartókat

Nyomásfenntartók, or pressure sustainers, are devices used in hydraulic systems to maintain a certain minimum pressure even when the main pump is not actively supplying fluid or when flow demands are low. They are crucial for ensuring the proper functioning of hydraulic actuators and other components that require a consistent pressure baseline to operate correctly or to remain in a specific position.

The primary function of a nyomásfenntartó is to store a small volume of hydraulic fluid under pressure. This stored fluid acts as a buffer, releasing pressure when system demand drops and preventing it from falling below a set threshold. When the system pressure drops, a valve within the nyomásfenntartó opens, allowing the stored fluid to flow back into the system, thereby maintaining the minimum pressure. Conversely, when the system pressure rises above the preset level, the nyomásfenntartó may close off or absorb excess fluid to prevent over-pressurization.

Common applications for nyomásfenntartók include holding loads in place, such as in lifting equipment or clamping mechanisms, where a constant downward force is needed to prevent movement. They are also utilized in systems where rapid response is required, as the pre-charged pressure allows for immediate actuator movement without waiting for the main pump to build pressure. The design of nyomásfenntartók can vary, often incorporating a bladder or piston-type accumulator with an integrated relief or check valve mechanism to regulate pressure.