The Strength Calculation of the Pump Shaft with a Worn Impeller
Nikolay P. Ovchinnikov
Introduction: This paper presents the study of the impeller wear influence on stress-strain state of a centrifugal pump shaft. In agro-industrial sector, centrifugal pumps are used for watering various agricultural crops. During pumping water, a centrifugal pump impeller is usually a subject to influence of various irreversible physical-and-mechanical and physical-and-chemical processes that can result in a certain reduction in its mass.
Materials and Methods: We used a comprehensive approach including the analysis of a sufficient number domestic and foreign publications on the research topic and parametric studies conducted on a laboratory-pumping unit. We had modern vibration-based diagnostic equipment, the mathematical models of loading a pump shaft and a finite-element modeling in APM Win Machine software (Beam module).
Results: The comparison of the maximum equivalent dynamic stresses obtained according to the proposed method with existing methods for carrying out the checking strength calculation of a centrifugal pump shaft showed that account of the impeller wear significantly changes picture of stress-strain state shaft.
Discussion and Conclusions: The amendments proposed by the author in checking strength calculation of a centrifugal pump shaft will allow estimating its stress-strain state in certain production situations.
Keywords: centrifugal pump, shaft, strength calculation, impeller, wear
For citation: Ovchinnikov N. P. Strength Calculation of the Pump Shaft with a Worn Impeller. Vestnik Mordovskogo universiteta = Mordovia University Bulletin. 2017; 27(4):592–606. DOI: 10.15507/0236-2910.027.201704.592-606
This work is licensed under a Creative Commons Attribution 4.0 License.