نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده مهندسی مکانیک، دانشگاه صنعتی اصفهان
2 دانشکده مهندسی مکانیک دانشگاه صنعتی اصفهان
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Fault Diagnosis of gearboxes using vibrations is one of the most common methods in industry, which is performed by measuring and analyzing the transverse or torsional signals. The purpose of this research is to analyze the torsional vibration signals in time and frequency domain in comparison with the transverse vibration signals at different speeds, and then to determine the advantage of the torsional vibration signals for detecting the crack defect of the gearbox. To this end, the time-varying mesh stiffness of the gear pair has been extracted using the potential energy method for healthy and defective teeth. Then, the dynamic equations of the system are derived by the lumped parameter method and the transverse and torsional vibration signals of the gearbox are obtained. In the following, the vibration signals at different speeds has been analyzed in the time and frequency domain. The results show that the amplitude of frequency components, including mesh frequency and side bands, in the transverse vibration signal, is highly dependent on the working speed of the gearbox. However, by speed change, the torsional vibration signal, the vibration amplitudes at the mentioned components have little changes. This issue becomes important in the fault diagnosis process. Therefore, by using the torsional vibration signal, it is possible to survey the defect growth at different speeds (specially low speeds) of the system better than the transverse vibration signal.
کلیدواژهها [English]