AIRBORNE, FLUID-BORNEA ND STRUCTURE-BORNNEO ISE RADIATIONP ATHS IN A HYDRAULICP OWERA PPLICATIONE QUIPPEDW ITHA GEAR PUMP

摘要

External gear pumps are a common source of significant vibration and noise in hydraulic powerapplications. While them have been numerous investigations of the mechanism of noise generation in thepump and its effect on fluid-borne noise, few studies have considered the pump in the context of a typicalapplication where it may be mounted to a compliant supporting structure, such as a vehicle frame. Severalpaths for noise radiation are present, including: (i) dhect air-borne radiation fmm the pump casing, (ii)radiation from other hydraulic components connected to the pump through coupled fluid/structuraltransmission paths, and (iii) radiation from the support frame to which the pump is mounted. In this paper,relevant literature on the subject is reviewed. Results of pmliminaty experhnental parametric designstudies for a lift truck application focusing on hydraulic loading and coupling conditions and pumpmounting conditions are presented. Some reuunmendationa for future research are offered.