Intensive implementation of the piston compressor monitoring systems at hazardous production facilities of refinery and petrochemical enterprises established a problem of standardizing of measured parameters, which are used for condition monitoring of piston compressors. One of the main physical processes applied in monitoring systems is vibration.
Vibration parameter standardizing method uses a deduced form experiments fact: when machines function normally the vibration parameters of some of the machines have lower values than those that can be used as limiting ones.
Today in Russia there are acting standards which allow together with monitoring systems for hazardous production facilities and in compliance with requirements of the 1st class monitoring systems, to ensure that static, dynamic errors and risk of failure of dangerous condition do not exceed 5%.
As a result, for the first time in the world, monitoring systems made in accordance with STO 03-007–11 standard using the developed algorithms of automatic expert system for decision-making allows to carry out condition monitoring of piston compressors of hazardous production facilities and to provide their safe resource-saving operation.
Kostyukov V.N., Naumenko A.P. Standardization in diagnostics and monitoring of piston compressors // Territoriya NDT (NDT Territory). - 2014. - №4. - P. 28-33.
Improving techniques for condition assessment of mechanical parts of electric trains in operation is an ongoing challenge.
The paper presents the results of researches aimed at establishment of a range of vibration parameters change for mechanical part of electric trains, in order to provide requirements for the dynamic range of measurement channels when developing an on-board system for vibration analysis and condition monitoring of mechanical parts of electric trains.
Tsurpal A.E., Basakin V.V., Ilyushin M.S. Vibration-activity analysis of mechanical parts of electric trains // Dinamika sistem, mehanizmov i mashin (Dynamics of systems, mechanisms and machines). - Omsk: OmSTU, 2014. - Iss. 4. - p. 164-167.
Satisfying operation of a turbo-unit can be reached by elimination of unacceptable values of defects, good alignment of details in hot position, stable position of supports in the turbo-unit, i.e. absence of considerable damages in their base or support shift during the change from cooling or cold condition to hot condition.
The article touches upon operational detection of various defects of big power turbo-units’ shaft lines assembly, made during repair works. Specifications of rotor movements and variable stress in rotor journals, weld joints and half-coupling bolts are shown by the numerical defect modeling. The examples and basic causes of half-coupling bolts operational distortion are revealed. Also, the article shows specifications of automatic diagnosing and quantitative measurement of defect parameters in turbo-unit condition monitoring systems.
Kumenko A.I. Diagnostics of shafting lines assembly in large power turbo-units using shaft sensors // Dinamika sistem, mehanizmov i mashin (Dynamics of systems, mechanisms and machines). - Omsk: OmSTU, 2014. - Iss. 4. - p. 161-164.
Higher intensity of suburban railway line transportation and provision of its safety in conditions of simultaneous reduction of operational costs for railway-yard maintenance have even requirements towards reliability level and maintenance quality provided for rolling stock.
Statistically, an electro-pneumatic system and its parts is highly vulnerable to the impact of human factor during maintenance and repair and damageable during operation. It’s about 80% of all damages and at least 75% of all costs for maintenance and repair.
The article presents the results of studies on the development for diagnostics of electro-pneumatic systems, which allows to increase the accuracy by increasing the depth and completeness of the diagnostics.
Kostyukov Al.V., Kazarin D.V., Schelkanov A.V. Method for diagnostics of electro-pneumatic systems of electric trains // Dinamika sistem, mehanizmov i mashin (Dynamics of systems, mechanisms and machines). - Omsk: OmSTU, 2014. - Iss. 4. - p. 158-161.
Solution for the problem of safe and reliable operation of machines of hazardous petrochemical facilities is directly related to the monitoring of their operational risks.
To monitor risks of hazardous production facilities one need to assess the performance of equipment reliability in real operating conditions, to know the mean time of machinery operation before defect nucleation and occurrence of a dangerous technical condition (emergency).
In addition, the reliability analysis of machinery units of petrochemical facilities shows that dynamic equipment accounts for more than 70% of failures.
Thus, the solution for the most important problems of safe and reliable operation of machines of continuous hazardous productions of petrochemical facilities is to determine the mean time of the machinery operation considering different technical conditions.
Kostyukov V.N., Kostyukov A.V., Sinitsyn A.A., Tarasov E.V. Reliability assessment of safe operation of petrochemical facilities // Dinamika sistem, mehanizmov i mashin (Dynamics of systems, mechanisms and machines). - Omsk: OmSTU, 2014. - Iss. 4. - p. 154-157.
In general case, using a combination of diagnostic features, with each feature characterizing the diagnostic object’s condition with a certain probability, it would be correct to establish a critical rule by which the combination of features would be considered to be related to one of the possible states (diagnoses). In particular case, it is important to distinguish two diagnoses (differential diagnostics or dichotomy), such as “good condition” and “faulty condition”.
Methods of statistics decisions, such as minimal risk method, minimal faulty decision method, minimax method, Neumann-Pearson method, maximum likelihood method allow to choose the critical rule using optimum conditions, such as minimum risk condition, reducing chance of a diagnostic error at a set level of another error.
The paper considers selection of a method for establishing standard values of diagnostic features using a theory of statistic decisions-making. The paper dwells upon calculation of probability of defect skipping and false alarm, as well as failure skipping risk while establishing a standard feature value by various methods of decision-making.
Kostyukov V.N., Naumenko A.P. Risk assessment for establishing standard values of diagnostic features // Dinamika sistem, mehanizmov i mashin (Dynamics of systems, mechanisms and machines). - Omsk: OmSTU, 2014. - Iss. 4. - p. 150-154.
The paper dwells upon the development results of an experimental unit intended to be used as a part of a comprehensive program to study vibration-acoustic processes in order to obtain data on vibration of mechanical parts of a rolling stock in operation.
Kostyukov V.N., Kostyukov Al.V., Boyarnikov A.V., Schelkanov A.V., Kazarin D.V., Tsurpal A.E., Yudin K.V., Aleksandrov I.V., Melk V.V. Measuring system for broadband vibration-acoustic processes // Dinamika sistem, mehanizmov i mashin (Dynamics of systems, mechanisms and machines). - Omsk: OmSTU, 2014. - Iss. 4. - p. 146-149.
Development of methodology and technology for piston compressors health control, diagnostics and monitoring by means of vibration analysis, as well as algorithms of automatic systems for piston compressors monitoring which provide their fault-free operation, is an actual problem.
Data collection and processing is the basis of piston compressors monitoring and diagnostics technology, thus providing compressors defects and malfunctions detection with a specified depth of their detailing and reliability and a hazard level.
Realization of monitoring and diagnostics technology is based on application of vibration-acoustic signals structure models upon occurrence of various defects and malfunctions in piston compressors components, set of malfunctions and standard values diagnostic features, methods of vibration-acoustic signals transformation and a system for their parameters estimation.
The paper considers methodology of the diagnostic signal processing and the monitoring system functional diagram.
The proposed monitoring and diagnostics methodology is based on measurement of vibration-acoustic oscillations parameters and characteristics, as well as measurement of direct structural and thermodynamic parameters.
The structure and functioning principles of the expert system for decision-making support have been presented.
Functioning algorithm of the automatic expert system includes calculation of the diagnostic features values based on their normative ones, formation of the diagnostic features sets which correspond to individual malfunctions classes and formation of the expert system messages.
The scheme of the system for piston compressors real-time condition monitoring has been considered.
The system has a series-parallel structure of a data-measuring complex for data collection and processing, which allows to measure the vibration-acoustic signals parameters for piston compressors and their operating modes monitoring. Besides, the system allows to measure other physical processes parameters, for example, for monitoring and diagnosis-making purposes it has been provided to measure and apply pressure in decreasing spaces (an indicator diagram), gas temperature, a rod position, leakage through stuffing boxes and others.
GOST R 53563-2009. Condition monitoring and diagnostics of machines. Monitoring the condition of the equipment hazardous. Order organization - DYNAMICS SPC, Russian Technical Expertise, Scientific-and-Industrial Union "RISCOM", NPO "RDC CD", – Introduced on 01/01/2011, Moscow, "Standardinform" - 2010 – 5 p.
Naumenko A.P., Vibration-acoustic model of piston compressor diagnostic signal // Dynamics of systems, mechanisms and machinery systems: materials of VII International Scientific and Technical Conference, 10-12 November 2009, Omsk. Omsk Technical State University, 2009. Vol. 2. P. 39-44.
Naumenko A.P., Methodology of vibration-acoustic diagnostics of piston machinery // Bauman’s MSTU Reporter. Special edition. Mechanical engineering series. Moscow, Moscow State Technical University n.a. N.E. Bauman. 2007. p. 85-95.
Naumenko A.P., Models of piston compressor vibration-acoustic signals // Science, Education and Business: materials of regional scientific and practical conference devoted to Radio day. Omsk, KAN, 2010, p. 114-120.
Naumenko A.P., On some models of piston machinery vibration-acoustic signal structure // Dvigatel – 2010: International Scientific conference, devoted to the 180-Anniversary of Moscow State Technical University n.a. N.E. Bauman [edited by N.A.Ivashchenko, V. A. Wagner, L.V.Grekhov]: Moscow State Technical University n.a. N.E. Bauman, 2010. С. 75-79.
Kostyukov V.N., Synthesis of invariant diagnostic features and the units health models for diagnostic purposes (article), V.N. Kostyukov, Omsk Scientific Bulletin, 2000, №12, pp. 77-81.
Kostyukov V.N., Naumenko A.P., Practice of piston machines vibration-acoustic diagnostics (article), V.N. Kostyukov, A.P. Naumenko, Collected works on engine building problems, devoted to the 175th Anniversary of Moscow State Technical University n.a. N.E. Bauman, Moscow, 2005, pp. 30-33.
Kostyukov V.N., Naumenko A.P., Problems and solutions of piston compressors safe operation (article), V.N. Kostyukov, A.P. Naumenko, Compressor Techniques and Pneumatics, 2008, №3, pp. 21-28.
Kostyukov V.N., Naumenko A.P., Solution for problems of piston compressors safe operation (article), V.N. Kostyukov, A.P. Naumenko, Assembling in Mechanical Engineering and Instrument-Making, 2009, №3, pp. 27-36.
Naumenko A.P., On vibrational diagnostic parameters’ choice// Science, Education and Business: materials of regional scientific and practical conference devoted to Radio day. Omsk, KAN, 2010, p 106-115.
GOST R 53565-2009. Condition monitoring and diagnostics of machines. Monitoring the condition of the equipment hazardous. Vibration centrifugal pump and compressor units - DYNAMICS SPC, Russian Technical Expertise, Scientific-and-Industrial Union "RISCOM", NPO "RDC CD", - Introduced on 01/01/2011, Moscow, "Standardinform" – 2010 - 8 p.
Kostyukov V.N., Rationing of vibration parameters within piston compressors diagnostics (article), V.N. Kostyukov, Consumers – manufacturers of compressors and compressor equipment, 7th International Symposium, Proceedings, Saint-Petersburg, 2001, pp. 90-93.
Kostyukov V.N., Naumenko A.P., Regulatory and methodological support of piston compressors health monitoring (article), V.N. Kostyukov, A.P. Naumenko, Testing. Diagnostics, 2005, №11, pp. 20-23.
Naumenko A.P., Modern methods and means of real-time piston machinery health monitoring / Compressor machinery and pneumatics. №8, 2010. p. 27-34.
Kostyukov V.N., Naumenko A.P., Boychenko S.N.. Method of vibration diagnostics of machinery: pat. 2 314 508 Russian Federation. 2006135874/28; declared 10.10.2006; published 10.01.2008. Bulletin No. 1.
Kostyukov V.N., Naumenko A.P., Boychenko S.N.. Method of vibration diagnostics of piston cars’ condition by spectral invariants: pat. 2 337 341 Russian Federation. No. 2007113529/28; declared 11.04.2007; published 27.10.2008. Bulletin No. 30.
Kostyukov V.N., Naumenko A.P., Method of vibration diagnostics of objects: pat. 2 363 936 Russian Federation. 2008121486/28; declared 27.05.2008. published 10.08.2009. Bulletin No. 22.
GOST R 53564-2009. Condition monitoring and diagnostics of machines. Monitoring the condition of the equipment hazardous. Requirements for monitoring - DYNAMICS SPC, Russian Technical Expertise, Scientific-and-Industrial Union "RISCOM", NPO "RDC CD", - Introduced on 01/01/2011, Moscow, "Standardinform" - 2010 – 20 p.
Kostyukov V.N., Boychenko S.N., Kostyukov Al.V., Automated control systems for safe money-saving operation of refineries and petrochemical plants equipment (ACS SMSPM - COMPACS®) (monograph), V.N. Kostyukov, S.N. Boychenko, Al.V. Kostyukov, Moscow, Mechanical Engineering, 1999, 163 p.
Kostyukov V.N., Naumenko A.P., Health monitoring system for reciprocating machines (article), V.N. Kostyukov, A.P. Naumenko, Testing. Diagnostics, 2007, №3 (105), pp. 50-59.
Naumenko A.P., Real-time condition monitoring of reciprocating machines (full report text) // CM2009/MFPT2009 (The sixth international conference on condition monitoring and machinery failure prevention technologies): materials of a conference (June 23-25, 2009). Irish, Dublin, 2009. Pp. 1202-1213.
Naumenko A.P., Research on vibration-acoustic parameters of piston units // Dvigatel – 2007: materials of International Scientific and Technical Conference [edited by N.A.Ivashchenko, V. A. Wagner, L.V.Grekhov] М.: Moscow State Technical University n.a. N.E. Bauman, 2007. P. 518-525.
Naumenko A.P. Diagnostics and Condition Monitoring of piston compressors // CM2010/MFPT2010 (The Seventh International Conference on Condition Monitoring and Machinery Failure Prevention Technologies) (June 22-24, 2010): materials of a conference. England, Stratford-upon-Avon, 2010. Pp. 1-11. 1 CD-disk (CD-ROM).
Vibration in Technic: Reference book in 6 volumes. [edit. council: V.N. Chelomey]. Moscow, Mashinostroenie, 1981. Vol. 5. Measurings and testings [under edit. Of M.D. Genkin]. 1981. 496 p.
Kostyukov V.N., Naumenko A.P. Technology of piston compressors real-time diagnostics and monitoring // Condition Monitoring and Machinery Failure Prevention Technologies (СМ/MFPT 2014)
Analysis of accidents and machinery comprising rotating parts has revealed that a considerable amount of shutdowns is caused by the destruction of rolling bearings (40-50 %). To solve the problem of preventing sudden failures of the bearings one shall implement vibration monitoring of bearings condition during operation and switch from PPM to a condition-based maintenance and repair system.
Almost all existing methods of rolling bearing condition diagnostics deal with analysis of vibration-acoustic signals in time or frequency domains. But since operation of bearings within the machinery unit sometimes produces a lot of noise, there is a chance of a second-kind error occurrence.
That is why an increase of reliability of diagnostic results due to new method development is an urgent task. In that connection, a study of changes in characteristic function parameters of vibration-acoustic signals of bearings during condition measurement arouses a great interest.
Kostyukov V.N., Naumenko A.P., Kudryavtseva I.S. Diagnostics of rolling bearings by characteristic function parameters // Dinamika sistem, mehanizmov i mashin (Dynamics of systems, mechanisms and machines). - Omsk: OmSTU, 2014. - Iss. 4. - p. 142-145.