Autor: Lus, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Tests results of new diagnostic method for WOLA marine diesel engines type H
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/245573.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
maritime transport
combustion engines
diagnostics
Opis:: Results of studies that aim was to develop a diagnostic method for WOLA marine diesel engines type H are presented in this paper. These engines are high-speed type units used to drive small vessels or more often to drive ship generators. Polish Navy is operating significant number engines of this type. Motors of this type do not have indicator valves, which complicates the assessment of their technical condition in exploitation. These engines also, because of their age, are relatively poorly equipped in control and measurement devices. In the era of cost reduction in operation of marine equipment there is also tendency to reduce the cost of maintenance and repair of diesel engines. One way to avoid malfunction of the motor can be systematic monitoring of the technical condition of selected critical systems using reliable diagnostic methods. Polish Naval Academy (PNA) in Gdynia for years has been doing research on methods of diagnosing marine internal combustion engines. In recent years, a diagnostic method for high-speed diesel engines based on the analysis of envelope of vibration accelerations generated by the valve gear mechanism and fuel system of WOLA type H engines has been developed. Preliminary tests were carried out on a six-cylinder WOLA engine type 57H6Aa in the Marine Power Plant Operation Laboratory in PNA. Verification tests were conducted on twelve-cylinders WOLA engines of the same type on navy vessels. The developed method allows determine the angles of opening and closing the fuel injection valves and angles of closing intake and exhaust valves during engine operation. Using this method it could not be clearly determined opening angles of intake and exhaust valves.
Źródło:: Journal of KONES; 2013, 20, 1; 193-200
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Contemporary diagnostic and tuning methods for marine diesel engines
Współczesne metody diagnozowania i regulacji okrętowych tłokowych silników spalinowych
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/244329.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: okrętowe silniki spalinowe
diagnozowanie
regulacja
marine diesel engine
diagnostics
tuning
Opis:: Contemporary diagnostic and tuning methods and diagnostic tools for marine diesel engines are presented in the paper. Most of them, in their principle, based on measurements of internal cylinder pressure traces, pressure traces in high pressure fuel lines and on vibration signals. Different methods of fuel injection systems monitoring and diagnosing are shown together with malfunction finding in marine engines valve-train mechanisms. Specific aspects of low-, medium- and high-speed marine diesel engines tuning processes are discussed and some examples of malfunction from real maintenance process of engines which were observed with such systems are shown in the paper. Cylinder head with exhaust valve broken, broken exhaust valve - MB820 engine, pressure curve in cylinder and mean pressure for all engine cylinders after three years engine overhaul, piston group dismantling for engine type TD48 are presented in the paper. The paper concentrates on strategy of the operation of shipping engines, examples of monitoring systems and diagnostic methods for shipping engines and examples of their damages and inefficients. The dynamic development of the different kind devices for the inspection of the technical state and regulation of shipping engines is an object the paper.
W referacie przedstawiono współczesne metody diagnozowania stanu technicznego i regulacji okrętowych tłokowych silników spalinowych. Metody bazujące na pomiarach przebiegów: ciśnień wewnątrz-cylindrowych, ciśnień w instalacji wtryskowej oraz przebiegów drgań. W szczególny sposób omówiono sposoby oceny pracy aparatury paliwowej oraz mechanizmów rozrządu zaworowego. Uwzględnione zostały specyficzne aspekty dotyczące regulacji silników wolno-, średnio- i szybkoobrotowych oraz silników wyposażonych w różne typy układów wtrysku paliwa. Referat zawiera eksploatacyjne przykłady niesprawności wybranych elementów silnika, których rozwój byłśledzony z wykorzystaniem metod diagnostycznych. Głowica cylindra z uszkodzonym zaworem wylotowym, przełom grzybka zaworu wylotowego silnika MB820, przebieg ciśnienia w cylindrze na tle uśrednionego przebiegu ciśnień dla całego silnika w ok. trzy lata po remoncie kapitalnym silnika, demontaż zespołu tłoka - silnik TD48 są ilustrowane w artykule. Artykuł koncentruje się na strategii eksploatacji silników okrętowych, przykładach systemów monitorowania i metod diagnostycznych dla silników okrętowych oraz Przykładach uszkodzeń i niesprawności silników okrętowych. Dynamiczny rozwój różnego rodzaju urządzeń do kontroli stanu technicznego i regulacji silników okrętowych jest przedmiotem artykułu.
Źródło:: Journal of KONES; 2007, 14, 4; 239-246
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Vibro-acoustic methods in marine diesel engines diagnostics
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/245521.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
turbocharger
diagnostics
vibration
Opis:: Vibro-acoustic diagnostic methods which are used on marine high-speed diesel engines with turbochargers are presented in this paper. Vibration and acoustic signals generated by turbochargers need different signal processing methods to be effective and faultless in turbochargers diagnostics. Diagnostic methods which based on vibration and acoustic signals analysis are sensitive on engine load and speed changes. Methods presented in this paper based on vibration and acoustic signals processing in time and frequency domain. Using this methods checking technical condition of the turbochargers and its rotors and bearings without stopping the engine and dismantling it is possible. Examples of radial-flow rotor turbine overgrown by carbon soot and axial-flow rotor turbine without turbine blades, sound intensity level of turbocharger and acoustic spectrum of turbocharger in octave mode acoustic spectrum of turbocharger in octave mode for two different technical conditions, acoustic and vibration signal spectrum of the turbocharger, vibration acceleration amplitude of first harmonic for three turbochargers, values of harmonic vibrations of accelerations equivalent of turbine blades number, amplitude of vibrations accelerations in frequency domain for turbocharger in good and bad technical conditions are presented in the paper.
Źródło:: Journal of KONES; 2011, 18, 3; 203-210
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Marine diesel engine valve gear mechanism diagnostics problems
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/245681.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
diagnostics
valve gear
Opis:: Marine diesel engines have changed their construction last years because of electronic control implementation in fuelling process. Electronic control implementation could be also important in valve gear mechanism which is main part of the engine gas es exchange system. In this paper problems connected with of valve gear mechanisms operation and diagnostics have been presented. the diagnostic methods and processes which could impact diagnostic process will be shown together with examples from test bed and real vessels. diagnostic methods which based on vibration signals analysis are sensitive on engine load and speed change. separate engine cylinder 's loads generale differences in so called "dynamic valve gear diagrams " which will be shown for some marine engine types. opening and closing of inlet and exhaust valves generale vibration signals in entire engine structure. There are some tools available in signal analysis which gives opportunity to trace changes in signal patterns in real time monitoring systems. special diagnostic method based on vibration signal analysis worked out in the polish naval academy, gives opportunity to change engine maintenance philosophy from scheduled planed maintenance system to condition based maintenance system without fear about real operating engine conditions.
Źródło:: Journal of KONES; 2009, 16, 4; 287-292
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Marine high - speed reciprocating internal combustion engines investigations using envelope vibration method
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/246754.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine engines
diagnostics
fuel system
valve gear system
vibration method
Opis:: The article presents some current diagnostic methods for high-speed marine internal combustion engines in operation. A new exploitation strategy of marine diesel engines (Condition Based Maintenance strategy) requires having a substantial amount of information about the condition of the engines and the most important machinery and systems in conjunction with them. In the case of high-speed diesel engines, which usually are not factory-fitted with indicating valves, to assess the combustion process, to assess the technical condition and tightness of cylinders and tuning of fuel and valve gear systems can be used other methods such as vibro-acoustic. Test methods of technical condition assessment of the main propulsion engines and auxiliary engines on the basis of low- and high-frequency changing engine operating parameters and on the vibration processes accompanying such processes have been discussed in the paper. Vibration methods are of particular importance when engines are not equipped with cylinder pressure valves. The possibilities offered by the diagnostic method based on the angular selection of the vibrations accelerations envelope in the diagnosis of high-speed marine engines are also presented.
Źródło:: Journal of KONES; 2012, 19, 3; 263-269
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Tuning method for high-speed marine diesel engine MB820 Type
Autorzy:: Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/246964.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
diagnostics
tuning
fuel injector
valve gear
Opis:: Checking and tuning of the fuel injection valves opening pressures, fuel valves timing and exhaust or inlet valves clearances is a common practice in high-speed marine diesel engines maintenance. Cost lowering tendency in engine maintenance schedules and unmanned vessel's propulsion plants need new approach to these old and reliable procedures. Conventional maintenance methods for engine valve gear mechanism depend on valve clearances checks between valve stem and rocker arm and valve timing diagram checks on crankshaft flywheel. But how to observe valves' timing diagram on working engine and what is the difference between static and dynamic valves timing diagram and in the end how engine load and speed changes disturb observed parameters? Answers for these and other questions for high-speed marine diesel engines MB820 type are given in this paper. Dynamic valve gear timing diagrams are indispensable to perform an accurate engine tuning. A new original diagnostic and tuning method for high-speed marine diesel engine MB820 is presented in the paper. In the principle this method based on measurements of: internal cylinder pressure curves and on vibration signals. Typical diagnostic methods which based on vibration signals analysis are sensitive to engine load and speed changes. Researches presented in this paper were focused on the possibilities and differences of the dynamic timing diagram assessing at engine rated load and when idling.
Źródło:: Journal of KONES; 2010, 17, 2; 277-284
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The WOLA marine high-speed diesel engines diagnostics using vibro-acoustic methods
Autorzy:: Kluczyk, M.
Lus, T.
Powiązania:: https://bibliotekanauki.pl/articles/241671.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
maritime transport
combustion engines
vibroacoustic diagnostics
Opis:: In the paper, some results achieved during the tests of high-speed marine diesel engine WOLA 57H6Aa type are presented. This type of engine is still broadly use on Polish Navy vessels and on some civilian ships built in Polish shipyards, mostly as auxiliary or emergency generator. Several types of engine malfunction had been simulated especially in fuel injection system and in valve gear mechanism. The malfunctions were connected with fuel valve opening pressure, intake and exhaust valves clearances. During the tests engine speed and load had been changed in tolerant operation range. The tests were devoted to prepare some new diagnostic methods, which could be used on these types of marine diesel engines. Diagnostic methods, which based on vibration and acoustic signals analysis are usually sensitive on engine load and speed changes. During the tests, different methods based on vibration and acoustic signals processing in frequency domain were used. Set of applications possible to use by B&K PULSE system together with acoustic and vibration sensors were applied to analyse of signals changing by different types of simulated malfunctions. Aim of the research was to check if the acoustic and vibration signals generated by the engine systems and components analysed by B&K PULSE system with CPB measurement give possibility to find such parameters, which are unequivocal, strongly connected with different object structure parameters, easy to asses and measure.
Źródło:: Journal of KONES; 2014, 21, 4; 225-231
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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