Экспериментальное исследование рабочего процесса в пилотном образце осевого насоса с трехрядными мультипланными проточными частями

Abstract

The article describes the stages of preparing the pilot sample of a vertical first-lift condensate pump with a unique axial active part for physical tests and the results from studying the working process in it. The actual parameters of the polyrow hydraulic machine mockup version intended for carrying out physical experiments are given, and the main stages of elaborating the innovative unit’s design are outlined. The working members used in the three-row arrangement are described, their design is shown, and the method for manufacturing the impeller and guide vanes of the proposed complex multirow configuration is considered in detail. Prototyping---an advanced approach practiced in the machinery constructing industry---has been chosen as the method for manufacturing the polyrow pump working members. A technology for manufacturing the active part of a three-row mockup pump on a 3D printer is proposed. Information about the experimental test setup constructed at the research-and-production facilities of the Moscow Power Engineering Institute National Research University Institute is given. The difficulties encountered in designing the experimental test setup and in adjusting its equipment are described together with the methods used to resolve them. The vertical three-row pump assembled at the experimental test setup and prepared for a series of tests according to existing standards is shown. Information on carrying out the physical experiments is briefly outlined. The results from the polyrow pump tests are analyzed. Single-row axial working members designed according to the conventional pattern have been manufactured. The results from tests of the three-row pump and the single-row axial pump have been compared with each other.