The aim of the work is to develop and study a method for monitoring the technical condition of YaMZ-238D four-stroke V8 diesel engine of UK-25/25 laying crane by signal of the crankshaft instantaneous angular velocity. A refined mathematical model of the diesel shaft line has been developed taking into account both elastic properties of the shaft line sections and energy dissipation in the bearing units. The periodic nature of change in the shaft line instantaneous angular velocity makes it possible to use a Fourier transform to analyze amplitude spectra of the instantaneous crankshaft rotation speed, which spectral density depends on the shape of the total torque acting on the shaft line from the side of diesel cylinders. The results of modeling the diesel speed characteristics modes show that the spectral density of the signal of the crankshaft instantaneous angular velocity changes significantly when power of one of the cylinders decreases by 50% or more that allows to use this method for an integral assessment of the working process quality in diesel cylinders. At the same time localization of a faulty cylinder based on the analysis of the amplitude spectrum of the instantaneous angular velocity signal is possible only in the presence of a phase mark signal that is absent in serial engines. To solve this problem, it is proposed to use a wavelet transform of the crankshaft instantaneous angular velocity signal that converts the signal to the time-frequency domain and allows determining not only the general technical condition of the diesel engine, but also localizing the faulty cylinder.


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    Title :

    Operational Control of the Diesel Technical Condition of the Track-Laying Crane by the Signal of the Crankshaft Instantaneous Angular Velocity


    Additional title:

    Lect. Notes in Networks, Syst.


    Contributors:

    Conference:

    International Scientific Siberian Transport Forum ; 2021 May 11, 2021 - May 14, 2021



    Publication date :

    2022-03-19


    Size :

    9 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English