HYDRAULIC POWER SYSTEM

摘要

The fluid reservoir (14) of a hydraulic system (10) is fitted with a nozzle (92) having a constricted primary discharge opening (100) for directing an accelerated jet stream of hydraulic fluid returned to the reservoir (14) from a pump (12) back to an inlet (38) of the pump (12). The jet stream aspirates additional fluid from the reservoir (14) to boost the supply to the pump (12) to minimize cavitation for quiet operation. The nozzle (92) includes at least one bleed hole (104) located upstream of the primary discharge opening (100) through which a fraction of the fluid stream escapes into the reservoir (14) and is permitted to dwell for a time sufficient to allow natural separation of entrained gas from the fractional stream before being drawn into the reservoir outlet (96) by the jet stream.