BISOPE series 36 Vibration problems of sleeve bearings journal bearings, metal bearings 3 excessive скачать в хорошем качестве

BISOPE series 36 Vibration problems of sleeve bearings journal bearings, metal bearings 3 excessive

BISOPE series 36- Vibration problems of sleeve bearings (journal bearings, metal bearings)-3-excessive tolerance -------------------------------------------------------------------------------------------------------------------------------------- Among the defects of the journal bearing, if the tolerance between the bearing and the shaft is large or the margin is large, it is not very different from the mechanical looseness phenomenon of vibration diagnosis. Since the bearing is not subjected to strong oil pressure, it is regularly cured at a frequency related to the number of revolutions. In addition, when most of the relaxation occurs, the space between the bearing and the shaft is large, so it is not related to the pulsation of oil (Whirl), and in gradually severe cases, it is naturally accompanied by friction (Rub). Therefore, the procedure of accurately measuring and assembling sleeve bearing tolerances requires deep attention and is one of the tasks performed by highly experienced maintenance personnel. Excessive clearance of sleeve bearings If the tolerance is excessive, the following vibration frequency characteristics are obtained. 1. High vibration values in the radial direction appear in the form of unbalance (mass imbalance), misalignment (shaft misalignment) or looseness (mechanical loosening), and are relatively good to detect in the vertical direction. 2. 1X, 2X or 3X RPM factors appear. Higher harmonics can also come in the form of looseness. 3. Vibration in the axial direction may also appear high. Especially in the case of Trust Bearing. It appears in the form of misalignment. 4. It is observed as a phenomenon in which floor noise rises through the entire frequency band. All copyright korea CBM written by BISOPE , [email protected], 070-4388-0415, www.kCBM.kr #bearing vibration, #sleeve bearing, #metal bearing defect, #journal bearing, #vibration defect, #whirl, #bearing friction, #subharmonic, #non synchronous, #transient tolerance, #vibration diagnosis, #vibration analysis, #vibration Measurement, #frequency analysis, #facility diagnosis, #vibration education, #resonance analysis, #resonance measurement, #CBM, #vibration monitoring