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Matematičeskaâ modelʹ integralʹnogo pokazatelâ poteri resursa silovogo èlektrooborudovaniâ tâgovyh podstancij v usloviâh èkspluatacii

Matusevič A. A.

Problemy Kolejnictwa

2015

Z. 169

29--36

W artykule sformułowano i rozwinięto teoretyczne podstawy oraz metodykę rozwiązywania problemów naukowo-technicznych dotyczących oceny eksploatacyjnej zasobów energetyki trakcyjnej na podstacjach. Udoskonalono metody prognozowania całkowitych zasobów, dzięki czemu stało się możliwe naukowe określenie możliwości przedłużenia okresu eksploatacji urządzeń elektrotrakcyjnych w podstacjach trakcyjnych. Na tej podstawie można planować zakres i okresy odnowy tych urządzeń w cyklu życia, a także zmniejszyć nakłady na eksploatację dzięki prowadzeniu procesu utrzymania na podstawie rzeczywistego stanu technicznego urządzeń. Parametr zasobów określa kompleksową, ilościową charakterystykę rzeczywistego stanu technicznego urządzeń. Opracowano model matematyczny zmniejszania się zasobów energetycznych w zależności od warunków eksploatacji. Przedstawiono obliczenia utraty zasobów transformatora przy różnych temperaturach pracy występujących w eksploatacji.

The theoretical basis and methodological support solution of actual scientific and technical problems of the quality and efficiency of maintenance and repair is formed and further developed by providing an assessment the resource power electric of traction substations of railways in operation. Methods of forecasting of a residual resource are improved. They allow making scientifically based conclusions about the possible timing of the extension of operation of power electric of traction substations and thus providing a reasonable frequency and amount of recovery of wear throughout the life cycle, and reduce operating costs through the use of service based on the actual technical state. The parameter a technical resource is viewed as an integral quantitative characteristic of the actual state of the electrical equipment. The mathematical model for evaluating operation of electrical power resource, taking into account its operation modes is developed. Calculation of the expense of the resource transformer for different temperature operating conditions when exposed to operational factors is done.

Prediction of pumping units reducers' resource

Kopey B. V., Bednarz S., Steafanyshyn O. I.

AGH Drilling, Oil, Gas

2014

Vol. 31, no. 1

117--122

Periodic monitoring of pumping units reducer vibration allow for a prediction of its full or residual resource to the next repair, which can be estimated on the basis of extrapolation methods and classification . Considering these two methods, we can say that the advantage extrapolation method has its accuracy and the possibility of adaptation to each specific gear, and the disadvantages include its complexity and the need to respect the conditions of constant change over time the vibration characteristics of the selected gear by law. In the application of classification method, which is simple, you need to process a certain amount of statistical data derived from the operation of machines, swing or perform experiments on a special stand that is relatively complex. In addition, the practice shows that the use of statistical techniques often makes accurate predictions due to the large gap modes of machines, swing and various properties of the pumped wells product, so the decision was made in solving this problem use the method of construction and extrapolation of time trend change of gear operating parameters. In Borislav CBPC the diagnostic examination of a number of reducers RN -2300 were conducted and the optimal level of vibration determined, whereby it can be concluded the qualitative repair of this type of gear . Some sensors during testing were installed on the gear housing near the output shaft. The average frequency of rotation of the input shaft gear was during vibroobservations was obtained respectively: /vh = 3.9 Hz and /vh = 3.53 Hz. Processing of the results was conducted by software MathCAD. Acceptable level of vibration that is recommended by standard GOST ISO 8579-2-2002 for gear RN -2300 is 8.3 mm / s, which can be used to determine its suitability for further exploitation . According to calculations conducted by an appropriate method the acceptable level of vibration above mentioned gear is 3.1 mm / s. These valid values are in good agreement with the experimental values and have a lower level compared to the standard recommendations. According to conducted researches the curve of resource prediction for gear of pumping unit has been plotted. Thus, the expected service life of the gear RN -2300 of pumping unit will be approximately 36-38 thousand hours.