(ON THE HYDRAULIC RESISTANCES OF STAGES OF VANE PUMPS)
The influence of flow channel roughness on hydraulic losses in vane pump stages is considered. A calculation method and algorithm have been proposed, which make it possible to estimate the contribution of hydraulic friction resistance of the fluid while flowing through hydraulically rough flow channels to the total value of hydraulic resistance of the stages of real vane pumps. The estimation of this contribution depending on axial width of flow channels for classical stages was carried out. The four Russian-produced ETsNAKI5 pump stages of 5th dimension with 80 mm diameter and three American-produced pump stages SN2600, SN3600 and S8000N of 7A dimension with 122.22 mm diameter have been chosen for investigation. It has been established, in particular, that during the operation of high-flow vane pump stages with relatively wide flow channels the contribution of flow channel surface roughness into the hydraulic losses is insignificant, whereas for narrower flow channels the volume of hydraulic losses due to surface roughness significantly increases. A prediction is given about the values of reduction of hydraulic resistance and growth of hydraulic efficiency of pump stages at modernization of their design for oval type and type with oval-shaped cross-section of inter-blade flow channels.
Ageev Sh.R., Grigoryan E.E., Makienko G.P. Russian Vane Pump Units for Oil Production and Their Application. Encyclopedic reference book. Perm: Press-Master; 2007. (In Russ.)
Ivanovskiy V.N., Sabirov A.A., Degovtsev A.V., et al. Design and Study of Dynamic Pump Stages. Moscow: Gubkin Russian State University of Oil and Gas; 2014. (In Russ.)
Stasyuk I.O., Savin V.V. Method for Evaluating the Hydraulic Resistance of a Vane Pump Stage and Its Use to Improve the Efficiency of Pumping Units. Territorija “NEFTEGAS” [Oil and Gas Territory]. 2022;(7–8):52–60. (In Russ.)
Idelchik I.E. Handbook of Hydraulic Resistances. Edited by M.O. Shteinberg. 3d ed., updated and revised. Moscow: Mashinostroenie; 1992. (In Russ.)
Impeller of Blade Pump Stage: Patent No. 2735971 Russian Federation, IPC F04D 29/22 (2006.11), F04D 13/10 (2006.11), F04D 1/06 (2006.11). No. 2020108153, appl. 25.02.2020, publ. 11.11.2020. Authors and patent holders – Stasyuk I.O., Stasyuk A.O., Nakonechnyi A.I. (In Russ.)