THE COMPACS SYSTEM®
REAL-TIME VIBRATION DIAGNOSTICS
OF MACHINERY WITH PROBABILITY CLOSE TO 1
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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.
In 2001 the quality management system of DYNAMICS SPC was put through facultative certification. In 2018 it was recertified for compliance with standard GOST ISO 9001-2011. Its results confirmed a high level of goods and services quality management.
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Research of dependence of current consumption parameters of electric motor on its health

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Operation of motors in unsatisfactory technical condition leads to financial losses, connected with unpredictable equipment breakdown and caused by this violation of technological process. And also, it leads to considerable electric energy expenditure, caused by an increased current consumption.

In some cases, the diagnostics by the current or consumption capacity, perhaps, is the only one method of non-dismountable diagnostics of electric equipment. Such problem occurs during the diagnostics of air coolers and wind-powered generators. Such facilities have restricted access in terms of vibration sensors mounting, at the same time the mounting of current consumption sensors and control of consumed and outputted electric power do not involve any difficulties.

Spectrum-current analysis is the procedure of monitoring of current and voltage signals on motor terminals and their further analysis aimed at detection of electric and mechanical malfunctions (defects) of electric motors.

 

Boychenko S.N., Tkachenko A.A. Research of dependence of current consumption parameters of electric motor on its health // Nauka, obrazovanie, biznes (Science, education, business). - 2012. - pp. 199-200

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Tags: electric motor diagnostics Date: 24.02.2015
Views: 1408
 

Selection of method for diagnostics of auxiliary machine system of electric trains

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Operation of electric motors in unacceptable condition leads to material loses connected with unpredictable failure of the equipment and technological process breakdown produced by this failure, and also considerable expenditures of electrical energy, caused by increased power consumption.

One of these methods is based on that fact that the auxiliary machine systems of each section are independent in terms of ranked measured values. It allows to mark out sections with current references deviation from train`s average values, thereby it points out the section with developing malfunction in the supporting machine system.

It is perspective to develop method for condition diagnostics of electric trains based on spectral analysis of consumption/ generated current. This analysis allows to specify the condition of machine`s different elements and detect specific types of malfunctions.

Physical principle lying in the basis of this method is that any disturbance in the operation of electric and mechanical parts of the machine leads to change of magnetic flux in air gap and, consequently, to a change of a momentary electric current value. Accordingly, the presence of particular frequencies of fixed value in a current of a spectrum of three-phase feed system of auxiliary machines testifies the development of particular malfunctions of a unit.

Thus, for the continuous monitoring of auxiliary machine system it is enough to install three current sensors to the corresponded line conductors of transformation generator.

 

Tsurpal A.E. Selection of method for diagnostics of auxiliary machine system of electric trains // Nauka, obrazovanie, biznes (Science, education, business). - 2012. - pp. 202-205

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Tags: diagnostics electric multiple unit MDRS Date: 13.02.2015
Views: 1365
 

Condition monitoring and diagnostics of rolling bearings of high-voltage electric motors during their operation

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During the operation of high-voltage motors at hazardous industries, it has been proved that, bearings do not work out the operating time assigned by the manufacturer. The report covers issues on the condition monitoring and diagnostics of the defects in rolling bearings of a high-voltage motors during theirs operation, defines the causes of a premature emergence and development of the defects as well the measures worked out for ensuring safe and prolonged operation of the rolling bearings of high-voltage motors.

The collection and analysis of vibration parameters of electric motors during their operation is performed by means of the real-time condition monitoring system. A spectral matrix of defects frequencies has been developed on the basis of the analysis of rolling bearings vibration source. The spectral analysis of vibration parameters showed the presence of frequency components that reveal defects of the bearings. As a result of vibration analysis, a number of defects in the rolling bearings have been revealed and proved during the motor repair and inspection of its bearings for likely defects.

The condition monitoring and diagnostics of the rolling bearings during the operation of the electric motors have allowed:

  • timely decommissioning of the motor with the damaged bearings as well as prevention of accidents which may have occurred with the unit that dispenses fire explosive products;
  • detection of the principal cause of frequent failures of the rolling bearings, which is application of the bearings in inappropriate working conditions and non-fulfillment of auxiliary measures recommended by manufacturers of bearings to prolong lifetime of the equipment;
  • submitting of recommendations on use of the bearings in the motor.

 

Kostyukov V.N., Tarasov E.V. Condition monitoring and diagnostics of rolling bearings of high-voltage electric motors during their operation // Condition Monitoring and Diagnostic Engineering Management (COMADEM-2011), pp. 824-833

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Tags: vibration analysis rolling bearings electric motor diagnostics Date: 06.02.2015
Views: 1325
 

Condition monitoring and diagnostics of rolling bearings of high-voltage electric motors during their operation

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During the operation of high-voltage motors at hazardous industries, it has been proved that, bearings do not work out the operating time assigned by the manufacturer. The report covers issues on the condition monitoring and diagnostics of the defects in rolling bearings of a high-voltage motors during theirs operation, defines the causes of a premature emergence and development of the defects as well the measures worked out for ensuring safe and prolonged operation of the rolling bearings of high-voltage motors.

The collection and analysis of vibration parameters of electric motors during their operation is performed by means of the real-time condition monitoring system. A spectral matrix of defects frequencies has been developed on the basis of the analysis of rolling bearings vibration source. The spectral analysis of vibration parameters showed the presence of frequency components that reveal defects of the bearings. As a result of vibration analysis, a number of defects in the rolling bearings have been revealed and proved during the motor repair and inspection of its bearings for likely defects.

The condition monitoring and diagnostics of the rolling bearings during the operation of the electric motors have allowed:

  • timely decommissioning of the motor with the damaged bearings as well as prevention of accidents which may have occurred with the unit that dispenses fire explosive products;
  • detection of the principal cause of frequent failures of the rolling bearings, which is application of the bearings in inappropriate working conditions and non-fulfillment of auxiliary measures recommended by manufacturers of bearings to prolong lifetime of the equipment;
  • submitting of recommendations on use of the bearings in the motor.

 

Kostyukov V.N., Tarasov E.V. Condition monitoring and diagnostics of rolling bearings of high-voltage electric motors during their operation // Condition Monitoring and Diagnostic Engineering Management (COMADEM-2011), pp. 824-833

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Tags: vibration analysis rolling bearings electric motor diagnostics Date: 06.02.2015
Views: 57
 

Analysis of malfunctions of wheel-motor units of motor-driven rolling stock for the purpose of their diagnostics

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One of the most important assemblies of electric rolling stock is a wheel-motor unit. Its faultless operation determines abilities of transport to fulfill their main functions.

One of the main requirements to the wheel-motor units is a set operational resource. Operation of rolling and sliding friction systems, such as ball- and roller-bearing assemblies, traction gears, commutator-and-brush device and other devices, which are the elements limiting the train resource in general, and depend on the vibration condition, quality of manufacture, repair and assembly.

It is reasonable to carry out the diagnostics of these facilities both during operation and maintenance with the required diagnostic depth.

Typical for these malfunctions is high level of noise, vibration, impact sound. By the deviations and higher levels of these parameters with the help of vibration analysis means it is possible to trace the defect development up to the moment when the usage of defected element is inexpedient or impossible in terms of operation.

Vibration analysis is based on the analysis of vibration process features changes, presupposing that the vibration signal of the operation unit contains all the information on the interactions of its details.

 

Basakin V.V. Analysis of malfunctions of wheel-motor units of motor-driven rolling stock for the purpose of their diagnostics // Nauka, obrazovanie, biznes (Science, education, business). - 2012. - pp. 136-140

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Tags: diagnostics wheel motor unit vibration analysis rolling stock MDRS Date: 23.01.2015
Views: 1430
 

Choice of reciprocating compressors units for real time health monitoring

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The main purpose of condition monitoring systems (health monitoring systems) of piston compressors is maintenance of their safe and accident-free operation. The majority of modern piston compressor monitoring systems use direct measurement of structural parameters and thermodynamic process parameters. The quantity of structural parameters that can be measured by means of the sensors installed into assemblies does not guarantee sufficient control of technical condition of compressor assemblies and parts.

Measurement of compressor's thermodynamic parameters is an effective method of compressor's condition control in case the compressor squeezes technologically stable gases. Otherwise thermodynamic parameters mostly characterize technological working conditions of a compressor and not its technical condition.

The most effective monitoring covers condition of assemblies and details that are subject to frequent repairs. It should be noted that such assemblies and details determine safe exploitation of a compressor.

In order to reduce the cost of monitoring system's purchase and maintenance it is reasonable to measure the parameters of indirect processes, for example, vibration. Vibration sensors are easy to operate because they are mounted directly on a case of a compressor and its assemblies.

The paper presents data about repairs and faults of piston compressors at different oil-refining plants. On the basis of statistical data processing the most vulnerable assemblies and frequent faults are detected. In addition repair cost of a compressor is estimated. On the basis of the data obtained through processing the location of sensors to diagnose compressor assemblies and to detect defects by vibration parameters was detected.

The paper contains a block diagram of monitoring system of piston compressors based on a real-time condition monitoring system COMPACS® that has been functioning at oil-refining plants. Trends and parameters of vibration acoustic signals indicating emergence and development of compressor defects and malfunctions were analyzed. Emergence and development of defects and malfunctions in a compressor were illustrated by the analysis of trends and parameters of vibration acoustic signals. The analysis of data of COMPACS® monitoring system confirms high efficiency of compressor health monitoring systems that use vibratory (vibration acoustic) signals analysis.

 

Kostyukov V. N., Naumenko A.P. Choice of reciprocating compressors units for real time health monitoring // Condition Monitoring and Diagnostic Engineering Management (COMADEM-2011), pp. 824-833

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Tags: diagnostics piston compressor vibration analysis Date: 16.01.2015
Views: 1375
 

Experience of monitoring systems design and operation

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Low objectiveness of condition assessment and lack of observability of hidden processes of condition degradation of potentially dangerous and critically important units, caused by the wear and inadequate actions of maintenance and repair personnel. These are the fundamental reasons of operational problems of the units.

Operational losses can be minimized by timely and purposeful maintenance on the basis of real-time condition monitoring results and usage of full resource of the units, eliminating unscheduled (emergency) shutdowns and repairs providing high level of safety and technical readiness.

The existing regulatory framework of international standards determines only the general approaches to the monitoring problem solving by measuring of parameters of different processes, including vibration measurement.

Joint usage of various methods of diagnostics and non-destructive testing for condition control of potentially dangerous and critically important units, on one hand, is a complicated and actual task, since it is necessary to develop a complex of diagnostic features based on various parameters of physical processes. On the other hand, various types of units demand specific decisions on choosing of the diagnostic methods and parameters.

The solution of this problem can be made on the basis of fundamental research works, adequate approbation of the decisions and the developed systems operation in real conditions of potentially dangerous and critically important units functioning.

Many years of DYNAMICS SPC experience in design, implementation and operation of real-time monitoring systems for dangerous production facilities without shutdown, demounting and decommissioning at Russian enterprises and abroad allowed to develop not only methodological bases and brand-new technological decisions and means of real-time condition monitoring, but, also, regulative-and-methodical documents, which determine the classification and main technical requirements to monitoring systems, operational norms of vibration for several types of machines and mechanisms, and principles of dangerous production facilities monitoring.

 

Kostyukov V. N., Naumenko A.P. Experience of monitoring systems design and operation // Monitoring – Nauka i bezopasnost’ (Monitoring - Science and Safety). - 2012. - pp.108-119

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Tags: COMPACS diagnostics vibration non-destructive testing standard monitoring Date: 13.01.2015
Views: 1353
 

Basic principles of diagnostics and monitoring of piston machines

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In the basis of diagnostics and monitoring of piston machines lies collection and processing of the data providing detection of defects and malfunctions of piston machines with a set depth of specification and reliability, as well as the danger rates.

Diagnostics and monitoring technology realization is based on the structure models of vibro-acoustic signals occurring if case of failure nucleation in assemblies and details of piston machines, combination of their diagnostic features (DF) of malfunctions and signal parameters (DPF) if case of failure nucleation, standard values of DF and DPF, vibro-acoustic signal transduction and vibro-acoustic signal parameter assessment.

One practical method of the technology realization and diagnostic and piston machines monitoring problems solution is implementation of the mentioned above methodological decisions which determine the knowledge base connecting DPF and condition of assemblies and details of piston machines into the algorithms of the COMPACS® diagnostic and monitoring system functioning.

The article deals with the principles of formation of the technology for diagnosing by vibroacoustic signal parameters and condition monitoring of piston machines. The methodology of diagnostic signal processing and the operating diagram of the system for technical diagnosing are considered. Particular attention has been paid to the structure and principle of operation of decision-making expert system.

 

Kostyukov V.N., Naumenko A.P. Basic principles of diagnostics and monitoring of piston machines // Bulletin of the Siberian office of Academy of Military Sciences. - 2011. - pp. 198-201

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Tags: COMPACS vibroacoustic signal piston machine monitoring Date: 09.12.2014
Views: 1422
 

Vibration parameter trend classification for the aims of real-time condition monitoring

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With the help of automatic systems for real-time diagnostics and monitoring COMPACS®, which cover a huge amount of machinery equipment on the dozens of Russian enterprises, wide-ranging researches were carried out. As the result, the database in the form of vibration parameter trends was created in order to discover connection patterns between the vibration parameter changes nature and condition degradation of units of different types.

There is an experimentally proved mathematic model of the vibration parameter trend, which confirms the exponential increase of the trend in a catastrophic wear state. The statistical features of vibration parameter trends are examined. It is ascertained that the values of vibration parameters and their growth rates with high reliability are subjected to the Weibull-Gnedenko law.

Classification of the vibration parameter trend and other diagnostic features measured by the real-time monitoring systems is conducted. It revealed the trends with slow, medium and fast growth rates, trends with monotonous, exponential, alternating and multimodal features. There are also trends characterized by high and low dispersion.

All the types of trends reflect different types of the developing faults and their danger level. This data allowed to evaluate the standards of vibration parameter s and their growth rates in the centrifugal pump-and-compressor units. The received results are the basis of several Russian Federal standards, concerning condition monitoring of hazardous production facilities.

 

Kostyukov V.N., Kostyukov A.V. Vibration parameter trend classification for the aims of real-time condition monitoring // Testing. Diagnostics. - 2011. - № 12. - pp.26-33

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Tags: COMPACS diagnostics vibration parameter hazardous continuous productions monitoring Date: 28.11.2014
Views: 1400
 

Condition Monitoring and Automatic Diagnostics of the auxiliary equipment of the typical electric stations

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In order to provide stable, uninterruptible process of power production, one needs the constant condition control of the electric stations equipment. However, mainly, the general electric mechanisms - turbines – are equipped with the operational control and blocking systems. At the same time for the ensuring of a turbine operation it is necessary to use a few dozens of auxiliary equipment such as: different grinders, blowing fans, smoke-exhausters, feed, condensate, circulating, net pumps, coolers. Though, many auxiliary units are operated with no reserve and their sudden failure leads to the reduction of the amount of produced energy right up to full shutdown of the turbine.

Sudden failures are determined by the lack of constant automatic condition monitoring and diagnostics of auxiliary equipment. Usually, the vibration-diagnosing staff, which controls the equipment of thermoelectric power station by means of portable instruments, counts 2-3 members, and the number of the power station units is about several hundreds. In connection with that, the interval of the "manual" diagnostics of units exceeds the failure nucleation period, which leads to the sudden (from the operational personnel point of view) failure and faults of main units operation.

Equipping the auxiliary units of the power stations with systems of automatic diagnostics and condition monitoring COMPACS® is a real way to provide safe and reliable operation of electric stations.

The COMPACS® system ensures reliable diagnostics of the bearing defects, lubrication defects, technological process violations (cavitation, hydro-blows, etc.), defects of shaft centering and rotating parts balancing, poor fastening of pumps and electric motors, electro-magnetic defects, face seal failures more than 70% of which are caused by the high vibration rates of pumps and electric motors.

 

Kostyukov V.N., Tarasov E.V. Condition Monitoring and Automatic Diagnostics of the auxiliary equipment of the typical electric stations // Problems of vibration, vibration adjustment, vibration monitoring and diagnostics of the equipment of power plants. - 2011. - pp. 24-28

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Tags: COMPACS accidents prevention monitoring Date: 14.11.2014
Views: 1431
 
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