Assessment of the impact of the main technological characteristics of wells on the power consumption of pumps

The issue of assessing the impact of the main technological characteristics of wells on the power consumption of pumps is one of the important issues. Based on the analysis of the data obtained in the article, the electric energy consumption of the well pump device the rotational speed of the pump (co); the density of the solution (liquid) (p); the pressure generated by the pump (H); the performance of the pump aggregate (q); depth of the well (H); hydrodynamic resistance (dp); Also, on the basis of the STATISTICA program, the calculation work is carried out, the binding function of the pumps is determined to what extent the factor affects the electricity consumption, and is described in the Pareto diagram.

FORECASTING THE VIBRATIONAL STATE OF AN ELECTRIC PUMP AGGREGATE

Purpose. The operation of electromechanical systems (EMS) in off-design modes and in which centrifugal pumps are used is accompanied by a number of negative factors, a special place among which is occupied by excessive blade vibration of the pump, which negatively affects its operational characteristics and causes a reduction in the service life of the main EMS units. Thus, an urgent task is to improve the operating characteristics of the pump as a component of EMS, which, by increasing the energy efficiency of the EMS working process and/or reducing the total cost of the life cycle of the pumps in their composition, will ultimately have a significant economic effect. Methodology. Experimental research of working process of an electric pump aggregate type D according to DSTU 6134:2009 and ISO 10816-3:2014. Results. Based on the experimental research results of vibration state of the pump D2000-100-2 bearing shell, which operates as part of the EMS, and the intensity of fluid pressure pulsations at its outlet, the limit root mean square value (RMS) of the pressure pulsation amplitude (∆Р ≥ 35,8 kPa and/or 3,4 % Н) is set at which an excess of the established ISO 10816: 3-2014 limit RMS of vibration velocity of the pump bearing shell ( V  2,8 mm/s ) and also is determined correlation coefficient ( / л k V Р ), which characterizes the RMS of the vibration velocity of the pump bearing shell at the blade frequency ( Vл ) depending on the RMS amplitude of the blade pressure pulsations (∆Р). Practical value. Since the number and systematic of experimental researches of the effect of pump parameters on the intensity of its blade vibration is complicated by the high cost of their implementation, therefore, it is advisable in further researches to use the RMS amplitude of blade pressure pulsations as an indirect indicator of the RMS vibration velocity of the pump bearing shell at the blade frequency. Conclusion. The intensity of pressure pulsations and influence of main parameters of the pump on their amplitude, with sufficient accuracy for engineering calculations can be determined by numerical modeling of the unsteady fluid flow in the flowing part of the pump. Figures 5, tables 2, references 10.

The development of turbine-pump aggregate

With increasing needs for energy, renewable energy sources have been nowadays the one of the main subject of interest all around the world. Therefore, we made an effort to develop a gamma of axial micro turbines, for a purpose of generation of electrical energy on small water derivation, as well as a part of an irrigation turbine-pump aggregate. In this paper are presented constructive solution of a turbine-pump aggregate with micro turbine and standard norm centrifugal pump. Based on project calculation, expected operating parameters are obtained. After defining conceptual solution of the aggregate detailed development of model on computer and numerical simulation of fluid flow in axial turbine are conducted. .

Paper 7: Hydraulic Powered Arm Systems

This presentation outlines the basic considerations and design objectives established for a modular artificial arm system activated by hydraulic pressure, and energized by a storage battery driving a miniature pump aggregate. The effects of physical disability and the clinical need for functional devices are presented in the light of previous experience with powered artificial limbs at the Rehabilitation Institute of Montreal and elsewhere. As a working example, the prototype hydraulic arms developed and constructed by the Northern Electric Research Laboratories are described in some detail. The engineering philosophy pointing toward the use of hydraulic power was evolved in an effort to exploit the advantageous characteristics of the pneumatic and the electromechanical system, without inheriting some of their innate drawbacks. The main function of the arms is to deliver the terminal devices to the work site; the design of a multifunctional cosmetic hand, developed specifically to be operated by external power, forms an integral part of a total-system approach.