ASSESSMENT OF SHIP POWER PLANT CAPACITY
| Autor: | Boris Olegovich Lebedev, Victor Ivanovich Kochergin, Sergei Sergeevich Glushkov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies. :56-63 |
| ISSN: | 2225-0352 2073-1574 |
| DOI: | 10.24143/2073-1574-2019-2-56-63 |
| Popis: | In modern conditions developing methods of functional diagnostics of the technical state of internal combustion engines, which are based on monitoring of power indicators, is of current importance for ship power plants (SPP). In terms of inability to estimate the plant’s capacity during the voyage, it was proposed to develop methods for its indirect estimation. Measuring the angular acceleration of the crankshaft of the going up engine is considered the well-known and most reliable method for estimating the power plant capacity. There has been presented a device flowchart for estimating the capacity of a SPP based on the ratio of fuel and air consumption. In this case the restriction is that the method can be employed only for the SPPs equipped with gearboxes with the function of discontinuity of the shaft line due to a great moment of inertia of the propeller submerged into the water. There has been suggested the analysis of the ratio of fuel and air consumption at a certain frequency of shaft rotation, as a versatile way to evaluate capacity of SPPs with internal combustion engines. It has been stated that the SPP energy parameters can be evaluated using the analysis of the torsional-vibrational system values. To this end, it was suggested to use a relatively new method of processing diagnostic information based on wavelet analysis using sensors of torsional vibrations installed on fixed supports and having a function to determine angular deformations of the shaft line caused by the rotation torque vibrations. A distinctive feature of the wavelet analysis is a high sensitivity in determining short-term high-frequency signal fluctuations. There is given an example of recording the amplitude values of torque when using this method. Amplitude values have been calculated on the basis of Morlet function, according to Hölder's indicator, at the SPP engine rotation speed 900 rpm for four turns of the engine crankshaft. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|