IMI Industrial Vibration Sensors Katalog Seite 37

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Predictive Maintenance Gearboxes The sensor has to be chosen based on calculated gear mesh frequency and bearing defect frequencies The gear mesh frequency is easily determined by multiplying the number of teeth on a gear by the rotational frequency For example a motor with 1800 rpm 30 Hz and a gear with 50 teeth results in a gear mesh frequency of 1500 Hz This result multiplied by a factor of 3 25 will provide the maximum frequency the sensor should be able to measure for best results If the number of teeth on a gear is unknown as a rule of thumb the maximum sensor frequency should be assumed to be 200 times rpm in Hz Typically high speed input and low speed output frequencies need to be measured near shaft bearings Sensors should not be mounted on resonance frequency prone housing locations to improve accuracy of the readings Sensors can be placed in radial ideally two sensors with a 90 degree angle and axial locations Radial sensors can be used to spot imbalance and axial sensors will best analyze gear mesh and bearing faults Most IMI sensors can be offered with an option to safely affix them inside of the gear housing for best measurement results Sensors can be pressure tested can withstand oils and chemicals inside of the case and are available in high temperature versions Advanced vibration monitoring systems in combination with experienced analysis can deliver a broad range of results Tooth wear gear eccentricity misalignment damaged teeth and other potential problems can be spotted instantly while the transmission is in service Main Drive Shaft Bearing Housing 34 visit us online at www imi sensors com 1 716 684 0003


Vorschau IMI Industrial Vibration Sensors Katalog Seite 37