Investigation of hermetic low-speed pumps performance when operating on highly viscous liquids

Abstract

Annotation During the operation of hermetic low-speed vane pumps in a wide range of viscosities of the working fluid, their characteristics change significantly. Experimental dependencies of the effect of viscosity on these characteristics for hermetic vane pumps do not exist. To determine these changes, 3D-models of the flow parts for various pumps are designed. By means of hydrodynamic modeling characteristics for each model are calculated when operating on highly viscous liquids. The results obtained are summarized in the form of relative head ratio and relative efficiency, which determine the performance characteristics of a hermetic pump for various operating modes. A comparison of the results with existing ones is carried.