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REAL-TIME VIBRATION DIAGNOSTICS
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In 2001 the quality management system of DYNAMICS SPC was put through facultative certification. In 2018 it was recertified for compliance with standards ISO 9001:2015. Its results confirmed a high level of goods and services quality management.
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Home Publications

Increasing precision of asynchronous motor diagnostics in real-time monitoring systems

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The paper dwells upon the precision of vibration parameter-based diagnostics of asynchronous motors with continuous monitoring systems. For diagnostics of asynchronous motors, it is important to separate mechanical and electrical components of a signal using its long selection ensuring necessary resolution capability. In that case, a combined monitoring algorithm is used to separate the mechanical and electrical components of a signal, although the monitoring period remains minimal.  Using the empirically acquired data we found out the suggested combined algorithm separates mechanical and electrical components and ensures minimal monitoring period.

 

Kostyukov Al.V., Boychenko S.N., Dudkin A.V. Increasing precision of asynchronous motor diagnostics in real-time monitoring systems // THE YOUNG RUSSIA: BREAKTHROUGH TECHNOLOGIES – INTO PRODUCTION. - No 1, - 2017. - p.249-254

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Tags: asynchronous motor mechanic defects electric defects long selection combined monitoring algorithm Date: 14.04.2020
Views: 456
 

Combining methods of vibration diagnostics and partial discharges for asynchronous motor diagnostics

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To determine machinery condition methods of vibration diagnostics are widely used today.  Those methods are utilized in personal, bench and stationary systems and adapted for various causes, including diagnostics of asynchronous motors by the vibration parameters of their bearing units.

Asynchronous motors can have specific defects of the electromagnetic system. Such defects are detected by the vibration diagnostic methods, but it’s quite difficult to localize and classify them. That might be connected with the fact that vibration signals may reflect processes undergoing on the stator windings, iron core and rotary conduction system.

The partial discharge method increases precision of the diagnostics since various defects of the electromagnetic system have different values of partial discharge parameters.  For instance, one can determine a stator winding phase in which the defect is developing. A combination of vibration diagnostics and partial discharge methods helps to detect defects of asynchronous motor electromagnetic system using various physical effects simultaneously to increase the precision of diagnostics.

 

Kostyukov Al.V., Boychenko S.N., Schelkanov A.V., Burda E.A Combining methods of vibration diagnostics and partial discharges for asynchronous motor diagnostics // THE YOUNG RUSSIA: BREAKTHROUGH TECHNOLOGIES – INTO PRODUCTION. - No 1, - 2017. - p.28-32

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Tags: diagnostics vibration partial discharge asynchronouselectric motor Date: 07.04.2020
Views: 481
 

Studying vibration parameters distribution laws for in-operation vibration in rotary units

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The paper describes a study of vibration parameters distribution laws for in-operation vibration in rotary units. To evaluate the reliability of rotary units’ diagnostics it is important to know the nature of the distribution of diagnostic signs characterizing the equipment operation.  The chi-squared test is used to check whether the empiric distribution belongs with the theoretical one. The experimental data helped to determine that an empiric distribution of diagnostic signs in rotary equipment is best to be described with a logarithmically normal distribution law.

 

Kostyukov V.N. Zaytsev A.V., Teterin A.V., Basakin V.V. Studying vibration parameters distribution laws for in-operation vibration in rotary units // THE YOUNG RUSSIA: BREAKTHROUGH TECHNOLOGIES – INTO PRODUCTION. - No 1, - 2017. - p.33-36 (http://elibrary.ru/title_about.asp?id=41264)

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Tags: diagnostic sign distribution law Date: 31.03.2020
Views: 511
 

On training scientific and engineering personnel and certification of NDT and technical diagnostic specialists

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The paper dwells upon an urgent problem of specialist training in various industries considering specific training programs for colleges and universities and demands of actual productions. Based on the specialist training program analysis, experience of the NDT personnel pre-certification training and college/university student training, communication with personnel of the existing production facilities, it was concluded that not only college training programs, but personnel training systems should be changed in order to comply with existing order at the modern enterprises of various industries.   

 

Kostyukov V.N., Kosyih A.V., Naumenko A.P. On training scientific and engineering personnel and certification of NDT and technical diagnostic specialists // Kontrol. Diagnostika. - 2017. - p. 38-44

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Tags: diagnostics NDT engineer personnel training college bachelor magister training program curriculum Date: 24.03.2020
Views: 512
 

Generalized model of vibration-acoustic signal structure and formation mechanism

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The paper dwells upon problems of modeling vibration-acoustic (VA) signals of machines and mechanisms. Its main objective is creating approaches to developing a phenomenological model of VA signal structure during the occurrence of defects and malfunctions. Partial models of VA signal structures of certain malfunctions of piston machines are suggested.

 

Kostyukov V.N., Naumenko A.P. Generalized model of vibration-acoustic signal structure and formation mechanism // Proceedings of the XXI Russian NDT and Diagnostics Conference. - Moscow: "Spektr" Publishing House, 2017. - p.187-196

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Tags: piston machine vibration-acoustic signal defect modeling Date: 17.03.2020
Views: 548
 

Monitoring distributed imbalance of experimental rotor using shaft sensor

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The paper dwells upon methodical issues of using shaft sensors for balancing and monitoring of imbalance in super-critical rotors. On the example of shafting with four rotary-table bearings, there are various results of different types of and finding distributed imbalance of a super-critical rotor with five discs.

The suggested method allows giving a constant estimation of residual imbalance state in modern systems of monitoring and technical diagnostics.

 

Kumenko A.I., Kuzminyih N.Yu., Timin A.V. Monitoring distributed imbalance of experimental rotor using shaft sensor // Proceedings of the XXI Russian NDT and Diagnostics Conference. - Moscow: "Spektr" Publishing House, 2017. - p. 186-187

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Tags: balancing shafting shaft sensor super-critical rotor Date: 10.03.2020
Views: 590
 

Reliability criteria and condition monitoring of power turbine units using static and dynamic powers in shafting supports

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The paper dwells upon the methodology of using shaft sensors in systems for vibration control, monitoring and automatic diagnostics of power units’ condition.  It suggests the ways of improving the regulatory environment in monitoring and diagnostic systems for turbine units.

Apart from traditional vibration-parameter-based criteria stated by GOST R 55263-2012 and GOST R 55265.2-2012, we suggest additional criteria for reliability of rotors and turbine units supported by sleeve-type bearings.  First of all, those are criteria for static and dynamic responses, as well as criteria for a shaft floating. For static responses we suggest, on the first stage, a maximum permissible deviation of 40% from the rotor’s weight. For dynamic responses, we suggest standards for dynamic loads due to residual imbalance.   For sub-critical rotors, the dynamic load must not exceed 5 % from the rotor’s weight, supported by the bearings. For super-critical rotors - 2 % maximum.

We suggest methods for their rating by the results of measuring static and dynamic displacements of the rotors’ necks. The paper gives examples of modeling static and dynamic forces in a power turbine unit’s bearings. Also, there are examples of modeling static and dynamic forces in turbine units’ bearings.

Those criteria of rotary units’ operation status imply using a full system of shaft sensors measuring displacement from both sides of the bearing as per GOST R 55263-2012, unlike ISO 13373-3: 2015, since for an introduction of the said criteria one needs to know quite precisely the position of shaft neck in the bearing bore.

The formulated criteria can be used for machinery status assessment in modern automatic diagnostic systems.        

 

Kumenko A.I., Kuzminyih N.Yu., Timin A.V. Reliability criteria and condition monitoring of power turbine units using static and dynamic powers in shafting supports // Proceedings of the XXI Russian NDT and Diagnostics Conference. - Moscow: "Spektr" Publishing House, 2017. - p. 181-186

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Tags: turbine unit monitoring system shaft sensor automatic system shaft neck displacement static displacement dynamic displacement; static and dynamic responses in bearings reliability criteria Date: 03.03.2020
Views: 528
 

On additional requirements to vibration control and condition monitoring systems for turbine units of TPS and NPC

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The paper provides an analysis of standard documents - ISO standards and Russian GOST analogues, such as: ISO 13379- 2:2014 (GOST R ISO 13379- 2- 2016)   Condition monitoring and diagnostics of machines - General guidelines on data interpretation and diagnostics technique. Part 2. Data-driven applications; ISO 13373-3:2015 (GOST R ISO 13373- 3- 2016)   Condition Monitoring And Diagnostics Of Machines — Vibration Condition Monitoring — Part 3: Guidelines For Vibration Diagnosis; ISO 13373- 9:2015 (GOST R ISO 13373- 9- 2016) Condition monitoring and diagnostics of machines - Vibration condition monitoring - Part 9: Diagnostic techniques for electric motors.

 

Kumenko A.I., Kuzminyih N.Yu On additional requirements to vibration control and condition monitoring systems for turbine units of TPS and NPC // Proceedings of the XXI Russian NDT and Diagnostics Conference. - Moscow: "Spektr" Publishing House, 2017. - p. 174-180

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Tags: diagnostic system turbine unit standards analysis vibration control Date: 25.02.2020
Views: 523
 

Automatic systems for health monitoring of production and transport industries providing high safety and efficiency

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For companies with an uninterrupted production cycle where the technology of operation is strictly set, the main problem of efficiency increasing is the reliability of equipment which is greatly influenced by the personnel operating various production processes in real time and often causing degradation of its condition. Combined with severe wear out of the main equipment featured at the majority of production and transport companies, the personnel’s negative impact on equipment condition leads to considerable losses due to accidents and downtime, as well as the high cost of repair.

 

Kostyukov V.N., Kostyukov A.V., Kostyukov Al.V., Boychenko S.N., Kazarin D.V. Automatic systems for health monitoring of production and transport industries providing high safety and efficiency // Proceedings of the XXI Russian NDT and Diagnostics Conference. - Moscow: "Spektr" Publishing House, 2017. - p. 167-174

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Tags: reliability safety automatic diagnostics monitoring system Date: 18.02.2020
Views: 518
 

Application of characteristic function of vibration for condition diagnostics of rolling bearings

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A big share of machinery failures (40÷50 %) is caused by the destruction of rolling bearings. To prevent sudden failures of rolling bearings a vibration diagnostics system for in-operation monitoring of bearings must be installed.

Virtually all methods of condition diagnostics of rolling bearings are based on the analysis of vibration-acoustic signals in time or frequency area.  To increase the accuracy of diagnostic results, there is an urgent task aimed at developing new methods.

The paper dwells upon the problems of practical use of vibration characteristic function (CF) parameters for evaluation of rolling bearings’ condition.  It describes an experimental system, system of diagnostic signs based on CF parameters, methods for obtaining experimental data, results of the data processing.

 

Kostyukov V.N., Kostyukov Al.V., Boychenko S.N. Application of characteristic function of vibration for condition diagnostics of rolling bearings // Proceedings of the XXI Russian NDT and Diagnostics Conference. - Moscow: "Spektr" Publishing House, 2017. - p. 155-162

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Tags: diagnostics monitoring rolling bearing characteristic function vibration-acoustic signal Date: 11.02.2020
Views: 547
 
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