scholarly journals Development of an Improved Methodology of Calculation of Parameters of an Asynchronous Motor Equivalent Circuit Using Experimental Data Obtained on the Basis of a Specialized Measuring Complex

2019 ◽  
Vol 7 (2) ◽  
pp. 60-71
Keyword(s):  
Experimental Data ◽  
Equivalent Circuit ◽  
Asynchronous Motor ◽  
Calculation Of Parameters ◽  
Measuring Complex ◽  
Specialized Measuring

scholarly journals Investigation of transitional processes of vibration machine with inertionic vibrator and asynchronous motor

2021 ◽  
Vol 2 (133) ◽  
pp. 97-109
Author(s):  
Dmytro Kononov ◽  
Viktor Yermokratiev ◽  
Yevhen Miroshnyk
Keyword(s):  
Experimental Data ◽  
Differential Equations ◽  
Nonlinear Differential Equations ◽  
Asynchronous Motor ◽  
Oscillation Amplitude ◽  
Mining Industry ◽  
Stable Operation ◽  
Vibration Machine ◽  
Start Up ◽  
Quality Of Products

Strict compliance with technological requirements in the production of steel is one of the main factors that determine the quality of products. In the mining industry, at metallurgical enterprises and transport hubs, all kinds of vibrating machines are widely used, and in particular vibrating conveyors (VTM): vibrating conveyors, vibrating conveyors and feeders, vibrating screens and screen feeders, and vibratory loaders. The main type of drive of such machines is an inertial drive, which consists of unbalanced vibrators. This drive is simple and has been widely used in vibrating machines of various types. To ensure stable operation (constancy of the oscillation amplitude when changing any system parameters) of such a vibrating machine with an inertial drive, a resonant setting is used. In this regard, there are difficulties that arise during start-up and run-out of the vibrating feeder: increasing the amplitude of oscillations, load on the foundation, power consumption, which leads to the fact that the motor does not reach rated speed and fails during start-up. Purpose: to study the dynamics of transients in VTM, which accompany the start of VTM from rest and run. The idea of the work is computer simulation of VTM dynamics based on numerical integration of a system of nonlinear differential equations describing the motion of a machine. As well as comparing them with experimental data. A mathematical model of VTM has been developed, differential equations of VTM motion have been compiled taking into account the characteristics of an induction motor. To solve the system of differential developed a program in the application Simulink. The obtained dependences confirm the increase in the amplitude of oscillation of the VTM tray when empty and stop VTM, which must be taken into account to calculate the parameters of the systems with vibrating machines. The experimental data are compared with the calculated ones, there is a good coincidence of results.

scholarly journals Some updates to the method for calculation of parameters of bottom trawl system

2016 ◽  
Vol 184 (1) ◽  
pp. 253-263
Author(s):  
Egor A. Zakharov ◽  
Oleg N. Kruchinin
Keyword(s):  
Experimental Data ◽  
Transcendental Equation ◽  
Geometric Parameters ◽  
Bottom Trawl ◽  
Fishing Gear ◽  
Calculation Of Parameters ◽  
Trawl Surveys

The method for calculation of geometric parameters of trawl system proposed by F.I. Baranov is analyzed. The calculation includes evaluation of spacer force and drag for all elements of trawl system and solution of transcendental equation to find a distance between the otter boards of bottom trawl. Special attention is paid to considering and enhancement of common techniques for determining force and geometric parameters of some elements of trawl system, with identifying the most appropriate ways. The calculations and experimental data are compared for a trawl system using the Scanmar equipment for monitoring of fishing gear. The updated model simulates more adequately the forming of bottom trawl geometry, therefore it can be used for assessment of the catch area during trawl surveys conducted by bottom trawls.

Investigation of the parameters of the cooling strength of compression foam when feeding through pumping and hose systems at low temperatures

2021 ◽  
Vol 92 ◽  
pp. 8-19
Author(s):  
M. V. Aleshkov ◽  
◽  
T. G. Merkushkina ◽  
V. D. Fedyaev ◽  
A. S. Gumirov ◽  
...  
Keyword(s):  
Experimental Data ◽  
Mass Flow ◽  
Low Temperatures ◽  
Statistical Data ◽  
Experimental Studies ◽  
Ambient Temperatures ◽  
Measuring Complex ◽  
Negative Temperatures ◽  
Goals And Objectives

Introduction. The article describes a methodology and a program of experimental studies to determine the parameters of the cooling strength of compression foam when feeding through pumping and hose systems at low temperatures. The numerical values of the parameters of the cooling strength of the compression foam when feeding through the fire hose 20 m long are determined. The experimental dependences of the parameters of the cooling strength of the compression foam on the multiplicity and mass flow are obtained. Goals and objectives. A program and methodology for experimental studies to determine the parameters of the intensity of cooling of compression foam when feeding through pumping and hose systems has been developed. To carry out experimental studies, the following tasks were set: - development of a measuring complex for determining the parameters of the cooling strength of compression foam when feeding through pumping and hose systems at negative temperatures; - determination of the physical model of the movement of the compression foam when feeding through the fire hoses; - development of a program and methodology for experimental research to determine the mass flow rate of compression foam. Methods. Methods of mathematical analysis of statistical data obtained during experimental data were used to determine the parameters of the cooling strength of compression foam when feeding through the pumping and hose systems. Results and its discussion. The numerical value of the cooling of the compression foam when feeding through the pumping-hose systems at low temperatures was obtained experimentally, depending on the multiplicity along the length of the hose line. Conclusions. 1. A program and methodology for conducting experimental studies to determine the parameters of the cooling strength of compression foam when feeding through pumping and hose systems at low temperatures has been developed. 2. As a result of the experimental studies, data were obtained on the rates and parameters of the cooling strength of the compression foam when feeding through fire hoses in winter at various negative temperatures. To measure the parameters of the cooling strength of compression foam when feeding through fire hoses at negative ambient temperatures, a measuring complex was developed and assembled. 3. The data obtained will make it possible to evaluate the parameters of the compression strength of foam cooling when feeding through the pumping and hose systems at low temperatures. Keywords: intensity of cooling, compression foam, foam-air mixture, pumping-hose system, foam generating unit, a unit for generating and supplying compression foam, low temperatures

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