A dry quenching condensate pump bearings from the assembly to the failure of the whole process of monitoring data

A dry quenching condensate pump bearings from the assembly to the monitoring data of 2021 - the whole failure process 01 - 21 peng beg flourishing plant dry quenching with the condensate pump drive on the drive end bearing are 6310, speed is 2981 RPM, by calculating the: outer characteristic frequency BPOF = 151. 4 ( Hz) Inner ring characteristic frequency BPIF = 245. 8 ( Hz) Rolling element characteristic frequency BSF = 196. 6 ( Hz) Maintains a characteristic frequency FTF = 18. 87 ( Hz) Through the vibration monitoring, tracing to its bearing from installation to fail. The first stage, in the initial stage of bearing failure, the frequency range between 20 KHz ~ 60 KHz or higher. Have a variety of electronic equipment can be used to detect these frequencies, including peak energy, HFD, impact pulse, SEE super audio measurement devices, etc. At this stage, the ordinary on the spectrum of won't appear any display. Installation does not appear after this bearing failure frequency. On the second stage, bearing minor defects produced by natural frequency, resonance frequency may be as a carrier frequency modulation of the bearing fault frequency. The third stage, when the bearing wear worsen, peak value will increase over time linear failure frequency spectrum. Some bearing bearing defects when just installed by frequency, but is not necessarily damage, mainly for harmonic frequencies. Below to run for a period of time after the velocity spectrum in outer ring failure frequency, inner ring failure frequency spectral envelope. The fourth stage, the failure frequency will generate harmonic, this suggests that a certain degree of impact, failure frequency harmonic sometimes earlier than the fundamental frequency peak was found at the same time, also can appear in the time domain waveform shock pulse. The fifth stage, more bearing failures, harmonic, due to the nature of the fault itself, there will be side band on the time domain waveform of spike wave will be more clear and obvious bearing high frequency detection, such as peak energy and impact pulse trend continues to rise. Phase 6, the rotating speed frequency amplitude increases, and a 1 x harmonic, this is the result of gap caused by the wear increases. The seventh stage, failure frequency and side band into high peak shape, often called 'the haystack. Can still hear the noise from the bearing, bearing temperature rise, but the bearing high frequency measurements may be gradually reduced. Phase, 8 'haystack' will continue to expand, in the spectrum of harmonic increases with increasing as loose. High frequency bearing measurements trends will continue to reduce, the noise level is on the rise. Can hear clearly bearing a different sound, abnormal bearing temperature rise at the same time, the herald the bearing will be scrapped. （ Source: the coalification run dry quenching technology exchange learning platform)