Dry vacuum pump common fault analysis

Common failure characteristics of dry vacuum pumps, including rotor imbalance, rotor misalignment, rotor bending, rotor wear or corrosion, the rotor attached to foreign bodies, rolling bearing wear, surface damage, including the outer ring, the inner ring, rolling Body, cage, etc., journal bearing loose, gear installation error, tooth damage or wear, loose parts, the following small make up to you in detail. Common Troubleshooting of Dry Vacuum Pumps 1. Rotor unbalance: the characteristic frequency of vibration is 1 × R; the vibration direction is radial; and the excessive vibration is a phenomenon often encountered. Among them, the ruler is the rotor rotation frequency. 2, rotor misalignment, rotor bending, rotor wear or corrosion, foreign body attached to the rotor: vibration characteristic frequency is generally 1 × R, often appear 2 × R, sometimes 3 × R and 4 × R; vibration direction is radial And axial; are common faults, the phase changes relatively stable, the phase mutation, and then stable. 3, the rolling bearing wear and tear, surface damage, including the outer ring, inner ring, rolling elements, cage, etc.: Vibration characteristics of the same frequency with the normal bearing the same frequency, but significantly higher amplitude should not be detected from the speed and bearing geometry Obtained, and often occur with the bearing resonance frequency of high-frequency (2 ~ 60kHz) vibration, vibration direction for the radial and axial. 4, journal bearing loose: axial sub-harmonic R, R / 2 or R / 3, the vibration direction is mainly radial. May occur at run time, or at high temperatures. 5, gear installation error, tooth damage or wear: vibration frequency of 1 × R; vibration direction of the radial and axial; occurred in the gear meshing frequency before and after the side band, indicating modulation, side frequency spacing corresponding to the modulation Frequency, the need to use narrowband analysis can be found. 6, loose parts: vibration frequency of 2 × R; Corresponding to the shaft bearing loose, but also the subharmonic and intermediate harmonic. (Editor: Li Juan) Recommended reading: 2016 second session of the Internet and Industrial Integration Innovation Summit

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