Abstract
The paper presents an innovative method for assessing technical condition of a marine diesel engine that drives synchronous generator. It is based on the measurement and analysis of generators phase-to-phase voltage. Additionally, it requires the measurement of a pseudoperiodic signal [3] with a period equal to duration of engines working cycle. The basis for developing method was the assumption that rotational speed fluctuations of an engines crankshaft (and also the generator) depend on a course of a working process carried out in it. The generators phase-to-phase voltage is directly dependent on a rotational speed fluctuation of its rotor. It must therefore be possible to assess a course of a working process of an engine based on a voltage waveform of a synchronous generator that cooperates ogether.
Highlights
An important group of engines used in shipbuilding diesel engines propelling ship's generators
The paper presents an innovative method for assessing technical condition of a marine diesel engine that drives synchronous generator
The study was conducted model for other states of partial technical suitability arguing that it should be possible to detect and identify damage involving: reducing a dose of fuel supplied to a cylinder by more than 20% of a nominal dose, change of injection timing, leaks in the piston-rings-cylinder system, changing an active cross-section of an injector holes
Summary
Method for assessing the technical condition of marine diesel engine driving the synchronous generator. The paper presents an innovative method for assessing technical condition of a marine diesel engine that drives synchronous generator. It is based on the measurement and analysis of generator's phase-to-phase voltage. The basis for developing method was the assumption that rotational speed fluctuations of an engine’s crankshaft (and the generator) depend on a course of a working process carried out in it. The generator's phase-to-phase voltage is directly dependent on a rotational speed fluctuation of its rotor. It must be possible to assess a course of a working process of an engine based on a voltage waveform of a synchronous generator that cooperates together
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