Факультет технічних систем і енергоефективних технологій (ТеСЕТ)
Permanent URI for this communityhttps://devessuir.sumdu.edu.ua/handle/123456789/25
Browse
Search Results
Item The analysis of the performance of a sewage pump in terms of the wear of hydraulic components(IOP Publishing Ltd, 2021) Молошний, Олександр Миколайович; Moloshnyi, Oleksandr Mykolaiovych; Szulc, P.; Moliński, G.; Сапожніков, Сергій Вячеславович; Sapozhnikov, Serhii Viacheslavovych; Антоненко, Сергій Сергійович; Antonenko, Serhii SerhiiovychThe paper presents the comparison of the performance of the three-blade centrifugal pump operating in sewage water in the function of time. Two conditions of the analysed pump were investigated: a new one and one after a long period of utilization. The main objects of research were the impeller, due to its enormous wear, and the L–shape wear ring. Three dimensional optical scanning was applied to reflect the real geometrical parameters of the analysed pump. The investigations were conducted by means of numerical simulations and a real test. The achieved results indicate the impact of the wear on the performance curves of middle specific speed sewage pump.Item Creation a universal technique of predicting performance curves for small-sized centrifugal stages of well oil pump units(IOP Publishing Ltd, 2021) Антоненко, Сергій Сергійович; Antonenko, Serhii Serhiiovych; Сапожніков, Сергій Вячеславович; Sapozhnikov, Serhii Viacheslavovych; Кондусь, Владислав Юрійович; Kondus, Vladyslav Yuriiovych; Черноброва, Анна Костянтинівна; Chernobrova, Anna Kostiantynivna; Мандрика, Анатолій Семенович; Mandryka, Anatolii SemenovychThe work provided is a continuation the development of research work on the process of pumping high-viscosity liquids and is aimed at creating a universal technique of recalculating the performance curves of dynamic small-sized pumps from water to highviscosity liquid. The practical need to develop such a technique became relevant after obtaining different results when using existing methods of predicting performance curves for hydrodynamic oil well pumps. The expediency of carrying out studies aimed at clarifying the scope of the technique for calculating the work parameters of a well oil centrifugal pump, which is being developed, is substantiated, and more thorough analysis of the structure of conversion coefficients taking into account the scale factor and flow regime in the hydraulic flow parts of the studied pumps.Item Effect of gas content in the pumped liquid on the characteristics of a torque flow pump(IOP Publishing Ltd, 2021) Сапожніков, Сергій Вячеславович; Sapozhnikov, Serhii Viacheslavovych; Антоненко, Сергій Сергійович; Antonenko, Serhii Serhiiovych; Мілтих, Вікторія Станіславівна; Miltykh, Viktoriia Stanislavivna; Москаленко, В`ячеслав Васильович; Moskalenko, Viacheslav Vasylovych; Мандрика, Анатолій Семенович; Mandryka, Anatolii SemenovychThe article considers one of the ways to increase the ability of a dynamic pump to pump gas-liquid mixtures - the application of the vortex principle of energy transfer. This scheme is embodied in a torque flow pump, which is able to pump mixtures with a gas content of up to 0,40 - 0,45 without additional devices for preparing the mixture. Experimental researches the influence the value of the volumetric gas content on the performance characteristics of the torque flow pump of the "Turo" type are given. The analysis of influence of structure of a stream of gas-liquid mixture on the value of the critical gas content in the interblade channels of the impeller is represented and developed a physical model of decrease the parameters of the torque flow pump.Item Influence of construction and operating pump parameters on pressure pulsations amplitude(IOP Publishing Ltd., 2021) Сотник, Микола Іванович; Sotnyk, Mykola Ivanovych; Москаленко, В`ячеслав Васильович; Moskalenko, Viacheslav Vasylovych; Strokin, O.O.; Антоненко, Сергій Сергійович; Antonenko, Serhii Serhiiovych; Сапожніков, Сергій Вячеславович; Sapozhnikov, Serhii ViacheslavovychThe research results that presented in the article are focused on decreasing the intensity of pressure pulsations in the flowing part of centrifugal pumps. The aim of the work is researching influence of changes in construction and/or operating pump parameters on pressure pulsations amplitude. Basing on the research results, were determined the main sources of pressure pulsations in the flowing part of the spiral centrifugal pumps and the reasons of increasing their amplitude during pump operation mode at supply 0.3Qopt…0.7Qopt. The article presents information about dependencies of pump head and pressure pulsations amplitude on construction and operating pump parameters, such as: number of blades (z), blade width at the impeller outlet (b2), ratio of volute initial diameter to impeller outer diameter (D3/D2), angle of output edge inclination (φ), rotor rotation frequency (n) and blades position of impeller halves in relative to each other (shift step - ψ).