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Error determination of gear rotation by vibration detection and neural measurement
Gears with broken teeth may be caused by gear overload and material defects. In the vibration measurement, the state of the broken tooth can be clearly observed according to the time domain signal, and the signal amplitude rapidly reaches a peak when the broken tooth is in meshing contact. Pitting failures are simulated on worn gears. Pitting is a major form of tooth surface fatigue. This is caused by the alternating load acting when the gears mesh. In this state of operation for a long period of time, cracks or other defects may be caused in the middle and the lower portion of the tooth surface, and at the end, abrasive grains are generated and fall off to form pitting corrosion. Radial runout is generally caused by inaccurate or incorrect gear machining methods. In the vibration measurement, the radial runout shows an increase in the sideband amplitude of the meshing frequency. The integrated lead error is generally caused by incorrect or erroneous methods of gearing during machining and assembly. In this case, the gear is not mounted perpendicular to the shaft, for example, because the gear bore is tilted or the key is not properly inserted. In vibration measurement, the integrated lead error can be expressed in the amplitude increase of the meshing frequency and the higher harmonics and the sideband of the meshing frequency. Limited lubrication means that the flow rate of the oil supply is much lower than normal. Changes in fuel supply flow rate affect temperature, oil film thickness, and ultimately increase friction and tooth surface failure probability.