Main Catalog Power, Metallurgic and Chemical Engineering Hydraulic Machines and Hydropneumatic units

Dynamics of small oscillations in a low-inertia rotor of a low-discharge centrifugal pump with hydrostatic bearings

Authors: Zakharova E.V., Protopopov A.A.
Published in issue: #5(10)/2017
DOI: 10.18698/2541-8009-2017-5-95
Category: Power, Metallurgic and Chemical Engineering \| Chapter: Hydraulic Machines and Hydropneumatic units
Keywords: low-inertia rotor, hydrostatic bearings, mathematical model, steady-state rotor angular velocity, pump specifications
Published: 26.04.2017

We studied oscillation dynamics for a low-inertia rotor of a low-discharge centrifugal pump with hydrostatic bearings and semi-open impellers so as to find the steady-state rotor angular velocity. We derived an equation for rotor angular velocity as a function of time from the equations of torques affecting the pump shaft. The steady-state angular velocity for preset parameter values was determined graphically. We also derived the steady-state angular velocity as a function of pump specifications.

References

[1] Lomakin A.A. Tsentrobezhnye i osevye nasosy [Impeller and propeller pumps]. Moscow, Mashinostroenie Publ., 1966. 364 p. (in Russ.)

[2] Mikhaylov A.K., Malyushchenko V.V. Lopastnye nasosy. Teoriya, raschet i konstruirovanie [Semirotary pumps: theory, calculation and engineering]. Moscow, Mashinostroenie Publ., 1977. 288 p. (in Russ.)

[3] Borovin G. K., Petrov A.I., Protopopov A.A., Isaev N.Yu. The dynamics of the rotor of the low mass centrifugal pumps with the hydrostatic bearings and the driven by the DC motors. Preprinty IPM im. M.V. Keldysha [KIAM Preprint], 2016, no. 142, 24 p. URL: http://www.keldysh.ru/papers/2016/prep2016_142.pdf (in Russ.) DOI:10.20948/prepr-2016-142

[4] Petrov A.I., Martynov N.D., Pokrovskiy P.A., Pashchenko V.I., Ustyuzhanin P.Yu., Korolev P.V., Artemov A.V. The experience of designing test bench for testing large centrifugal pumps. Nauka i obrazovanie: nauchnoe izdanie MGTU im. N.E. Baumana [Science and Education: Scientific Publication of BMSTU], 2010, no. 11, pp. 1–6. URL: http://technomag.bmstu.ru/doc/163848.html (in Russ.)