05. Levtsev A.P., Lapin E.S., Chen D. The Use of Disk-Shaped Diaphragm of Vehicles in Double-Circuit Diaphragm Pumps

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DOI: 10.15507/2658-4123.033.202301.068-078

The Use of Disk-Shaped Diaphragm of Vehicles in Double-Circuit Diaphragm Pumps

Alexey P. Levtsev
Dr.Sci. (Engr.), Professor, Head of the Chair of Heat and Power Systems of Institute of Mechanics and Power Engineering, National Research Mordovia State University (68 Bolshevistskaya St., Saransk 430005, Russian Federation), ORCID: https://orcid.org/0000-0003-2429-6777, Researcher ID: В-8620-2019, This email address is being protected from spambots. You need JavaScript enabled to view it.

Evgeniy S. Lapin
Senior Lecturer of the Chair of Heat and Power Systems of Institute of Mechanics and Power Engineering, National Research Mordovia State University (68 Bolshevistskaya St., Saransk 430005, Russian Federation), ORCID: https://orcid.org/0000-0001-9647-8663, This email address is being protected from spambots. You need JavaScript enabled to view it.

Daifen Chen
Ph.D., Professor, Dean of the School of Energy and Power, Jiangsu University of Science and Technology (2 Mengxi Rd, Zhenjiang 212003, China), ORCID: https://orcid.org/0000-0002-4110-2199, Scopus: 26536999100, This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract
Introduction. The article concentrates on improving the efficiency of double-circuit diaphragm pumps, which can be successfully used in heat and water supply systems of industrial and agricultural facilities where there is excess head. It is advisable to equip double-circuit diaphragm pumps with disc-shaped diaphragms interconnected by a rod, for example, from motor vehicles, and to drive them from the available head of the hydraulic network. In order to increase the efficiency of their work and further use, it is necessary to predict the hydraulic characteristics according to the geometric parameters of the membranes and the cycle of their operation in dynamics.
Aim of the Article. The article aims at obtaining adequate calculated dependencies of pumped liquid flow rate on speed of double-circuit diaphragm pumps.
Materials and Methods. There were used the idealization method from differential geometry, physical experiment, and mathematical statistics to solve the tasks for identifying the relationship between the rod motion and the liquid flow rate for a poppet diaphragm with different geometric surfaces in dynamics. There have been obtained the dependences of pumped liquid volume on the movement of the point of attachment by the poppet diaphragm and the volume flow rate on the movement speed of the point of attachment by the poppet diaphragm with specific geometric parameters for the parabolic and chain line. An experimental testing of the dependence of displaced pumped liquid flow rate on the movement of the attachment point to the stem for the diaphragm type 30 was carried out.
Results. Based on the obtained dependences of the volume flow rate on the speed of movement of the point of attachment by a poppet diaphragm with specific geometric parameters for a parabolic and chain line, there were constructed the graphs of dependences of the volume flow rate on the frequency of the working cycle. For practical implementation, there are proposed the dependencies for constructing the hydraulic characteristics of a two-circuit membrane (the dependence of the volume flow rate on the frequency of the working cycle) obtained on the basis of a parabolic interpretation.
Discussion and Conclusion. The hydraulic characteristics of a two-circuit membrane pump are close to the equation of a straight line and are consistent with experimental dependencies within 4%.

Keywords: diaphragm pump, disc diaphragm, hydraulic characteristics, dynamics, heat and water supply systems, energy efficiency

Conflict of interest: The authors declare no conflict of interest.

For citation: Levtsev A.P., Lapin E.S., Chen D. The Use of Disk-Shaped Diaphragm of Vehicles in Double-Circuit Diaphragm Pumps. Engineering Technologies and Systems. 2023;33(1):68‒78. doi: https://doi.org/10.15507/2658-4123.033.202301.068-078

Authors contribution:
A. P. Levtsev – obtaining volume dependences on the movement of the attachment point with a poppet diaphragm and volume flow, on the speed of movement of the attachment point with a poppet diaphragm with specific geometric parameters for a parabolic and chain line, analysis and revision of the text.
E. S. Lapin – text preparation, analysis of literary data, obtaining experimental volume dependences on the movement of the point of attachment with a poppet diaphragm.
D. Chen – development of the article concept, verification of the adequacy of the obtained volume flow rate dependences on the speed of movement of the point of attachment with the poppet diaphragm.

All authors have read and approved the final manuscript.

Submitted 05.02.2023; revised 20.02.2023;
accepted 02.03.2023

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