scholarly journals Electroresistive method for monitoring the technical condition, quality, reliability and safety the supports of rolling of electrical machines

2022 ◽  
Vol 1211 (1) ◽  
pp. 012021
Author(s):  
K V Podmasreryev ◽  
V V Markov ◽  
V V Mishin ◽  
A V Selikhov ◽  
N V Uglova
Keyword(s):  
Mathematical Modeling ◽  
Electrical Resistance ◽  
Experimental Studies ◽  
Rolling Bearing ◽  
Technical Condition ◽  
Electric Machines ◽  
The State ◽  
Electrical Machines ◽  
Technical State ◽  
Internal Environment

Abstract The necessity of monitoring the technical condition of the rolling supports of electric machines has been substantiated. It is proposed to use the electrical resistance of the bearing as an indicator of the technical condition the rolling support. The results of mathematical modeling of electrical resistance in the form of a function of resistance from factors of the internal environment of the bearing and modes of its assembly and operation in a rolling bearing are presented. An electroresistive method for monitoring the technical state the rolling support is proposed, which differs from the known methods by original algorithms for collecting information about the state of bearing parts, experimental studies have been carried out to confirm the efficiency of this method.

scholarly journals Reinforcement of Flexural Members with Basalt Fiber Mortar

Fibers ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 26
Author(s):  
Dmitry Kurlapov ◽  
Sergey Klyuev ◽  
Yury Biryukov ◽  
Nikolai Vatin ◽  
Dmitry Biryukov ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Experimental Studies ◽  
Concrete Structures ◽  
Basalt Fiber ◽  
Technical Condition ◽  
The State ◽  
Reinforced Concrete Structures ◽  
Fiber Reinforced ◽  
Flexural Members ◽  
New Buildings

Reconstruction of buildings and structures is becoming one of the main directions in the field of construction, and the design and production of works during reconstruction are significantly different from the ones of new buildings and structures. After carrying out a number of studies on the inspection of the technical condition of buildings in order to determine the effect of defects on the bearing capacity, the criteria for assessing the state of floor slab structures were identified. Conclusions on the state and further work of elements of reinforced concrete structures are considered. The authors achieve the aim of reinforcing flexural elements of reinforced concrete structures with fiber-reinforced mortar, which is especially important for floor elements with increased operational requirements. A technique for constructing a reinforcement layer using fiber-reinforced mortar from coarse basalt fiber has been developed. The parameters of basalt fiber in the reinforcement layer are substantiated. A method for solving problems of the operation of multilayer coatings under the influence of operational loads is used, in which the model prerequisites for describing the operation of layers are simplified, where the bearing layers are represented by classical Kirchhoff-Love plates. When solving problems, the maximum possible number of design features of flexural members is taken into account, in combination with appropriate experimental studies, the method allows us to consider all the variety of structures for reinforcing coatings and meet the needs of their practical application.

scholarly journals Methods for calculation of the marginal exploitation lifespan of power transformers 35 rV and higher based on the state index

2018 ◽  
Vol 58 ◽  
pp. 02006
Author(s):  
Alexandr Nazarychev ◽  
Dmitriy Andreev ◽  
Alexey Tadjibaev ◽  
Svetlana Vysogorets ◽  
Ilia Sulynenkov
Keyword(s):  
Initial Data ◽  
Condition Index ◽  
Technical Condition ◽  
The State ◽  
Technical State ◽  
Power Transformers ◽  
Integral Evaluation ◽  
The Real ◽  
State Index

A methods for determining the marginal exploitation lifespan of a transformer based on a complex diagnostic survey was developed. The integral evaluation of the technical state of the transformers is performed according to the value of the condition index. An example of the marginal exploitation lifespan calculation of the transformer according to the real initial data is given. The application of the methods will allow to proceed to the planning of technical re-equipment and reconstruction of energy facilities taking into account the technical condition of the equipment.

scholarly journals Method of diagnosing a car by fuel consumption

2021 ◽  
Vol 12 (2) ◽  
pp. 45-53
Author(s):  
Yuri Gorbik ◽  
◽  
Andriy Kashkanov ◽  
Oleg Antoniuk ◽  
◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Fuel Consumption ◽  
Experimental Studies ◽  
Calculated Data ◽  
Technical Condition ◽  
Operating Conditions ◽  
Energy Losses ◽  
Individual Assessment ◽  
Consumption Data ◽  
Overall Efficiency

Fuel consumption is a complex indicator that characterizes the efficiency of the vehicle, energy perfection of the car, the level of technical condition of the car, a variety of operating conditions. Changing the technical condition of components and systems of the car leads to increased energy losses, which ultimately increases fuel consumption and reduces the power of the car. If to carry out control of energy losses in each unit of the car on fuel consumption it is possible to diagnose not only the general condition of the car, but also to localize malfunction on units. The general assessment of the technical condition of the car can be performed on the basis of experimental and calculated fuel consumption data. Individual assessment of the technical condition of the units can also be assessed by private efficiency and indicator fuel consumption. The purpose of the work is to further improve the methodology and develop an algorithm for diagnosing the technical condition of the car to change the indicator fuel consumption of the car. To solve this goal, mathematical dependences and an algorithm for calculating fuel consumption and efficiency of the car on the units (indicator and mechanical engine, transmission and suspension of the car) were proposed. Also, after performing mathematical modeling of fuel consumption through efficiency, experimental studies of fuel consumption of the car VAZ-21101 were conducted. After conducting the experiment and obtaining the results, comparisons were made of the values of fuel consumption calculated by the formula M.Ya. Govorushchenko, due to the overall efficiency of the car, and the data obtained experimentally showed that the method really works and the error is about 5%. This allows us to conclude that the overall assessment of the technical condition of the car can be performed on the basis of experimental and calculated data on fuel consumption. Individual assessment of the technical condition of units can also be assessed by private efficiency and indicator fuel consumption.

Efficiency of application of the phase-chronometric method and neurodiagnostics for monitoring the degradation of rolling bearings during operation

2020 ◽  
pp. 43-50
Author(s):  
A.S. Komshin ◽  
K.G. Potapov ◽  
V.I. Pronyakin ◽  
A.B. Syritskii
Keyword(s):  
Life Cycle ◽  
Wavelet Analysis ◽  
Metrological Support ◽  
Rolling Bearing ◽  
Technical Condition ◽  
Measurement Information ◽  
Rolling Bearings ◽  
Vibration Diagnostics ◽  
Bearing Life ◽  
Alternative Approach

The paper presents an alternative approach to metrological support and assessment of the technical condition of rolling bearings in operation. The analysis of existing approaches, including methods of vibration diagnostics, envelope analysis, wavelet analysis, etc. Considers the possibility of applying a phase-chronometric method for support on the basis of neurodiagnostics bearing life cycle on the basis of the unified format of measurement information. The possibility of diagnosing a rolling bearing when analyzing measurement information from the shaft and separator was evaluated.

Method of tribodiagnostics of d-30KU engines/KP with the use of a microwave plasma complex: results of metrological examination and analysis of the accuracy

2020 ◽  
pp. 22-29
Author(s):  
A. Bogoyavlenskiy ◽  
A. Bokov
Keyword(s):  
Gas Turbine ◽  
Microwave Plasma ◽  
Technical Condition ◽  
The State ◽  
Turbine Engines ◽  
Metrological Examination ◽  
Gas Turbine Engines ◽  
High Frequency Plasma ◽  
Frequency Plasma ◽  
Primary Standards

The article contains the results of the metrological examination and research of the accuracy indicators of a method for diagnosing aircraft gas turbine engines of the D30KU/KP family using an ultra-high-frequency plasma complex. The results of metrological examination of a complete set of regulatory documents related to the diagnostic methodology, and an analysis of the state of metrological support are provided as well. During the metrological examination, the traceability of a measuring instrument (diagnostics) – an ultrahigh-frequency plasma complex – is evaluated based on the scintillation analyzer SAM-DT-01–2. To achieve that, local verification schemes from the state primary standards of the corresponding types of measurements were built. The implementation of measures to eliminate inconsistencies identified during metrological examination allows to reduce to an acceptable level the metrological risks of adverse situations when carrying out aviation activities in industry and air transportation. In addition, the probability of occurrence of errors of the first and second kind in the technological processes of tribodiagnostics of aviation gas turbine engines is reduced when implementing a method that has passed metrological examination in real practice. At the same time, the error in determining ratings and wear indicators provides acceptable accuracy indicators and sufficient reliability in assessing the technical condition of friction units of the D-30KP/KP2/KU/KU-154 aircraft engines.

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