Investigation of vibration activity of a centrifugal disc pump

Pumps with increased vibration and acoustic requirements are in high demand in various fields of both peaceful and military equipment, especially underwater, due to stricter standards of sound pollution and the development of tracking systems for vehicles. Disc pumps are one of the "quietest" pumps, due to their simple design and the absence of elements that cause eddy formation, but at the same time they provide less pressure than, for example, vane pumps, which is why the former have not been studied in detail at the moment. Despite this, these machines require optimization, design innovations and deeper analysis in the field of vibration reduction. One of the most optimal solutions to this problem may be the use of hydromodeling, which will make it possible to analyze several potentially successful design solutions before manufacturing and testing on specialized stands. Not so long ago, the staff of the Department of Hydraulics of the Moscow State Technical University named after N. E. Bauman began research in the field of disc pumps using hydrodynamic modeling and subsequent verification of the results on a test bench, which made it possible to modernize these machines, bringing them to a design intermediate between vane and disc pumps; but these studies did not concern the analysis of vibro-acoustic parameters. In this paper, the main sources of noise in centrifugal pumps are considered. One example of pump optimization in terms of vibro-acoustic properties is described. The optimization concerned some geometric parameters of the wheel and the guide device, and one of the main criteria affecting the vibro-acoustic properties was the uneven operating characteristics of the pump and hydraulic efficiency. A range of vibration accelerations was also obtained for the device as part of the stand.