Exploration of Acoustic Characteristics of Gear Pumps with Polymeric Pinion Shafts

The previous researches show that it is possible to replace several parts of gear pumps to polymeric ones. This substitution leads to cost and noise reduction of the pump unit. Therefore, the series of experiments on test bench SVNSH-08 with the use of acoustic camera Norsonic Nor848 for the analysis of acoustic characteristics was carry-out. Measuring system - portable 12-channel signals analyzer LMS SCADAS Mobile (SCM05) was used. Conducted experiment shows that acoustic characteristics of the pump unit depend on different material drive and driven rotor. Experimental result indicates that the proposed measures for replacing metal pinion shafts to polymeric reduce pump unit noise on the test modes.