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Vibration and Tooth Strain Measurement on a Pair Misaligned Power Transmission Helical Gears

Komang Bagiasna, Kiyohiko Umezawa & Toshio Suzuki


Abstract. A pair of helical gears with the following specifications: (1) the total contact ratio of more than 2.0, and (2) the overlap ratio of less than 1.0, has been investigated to determine the relationship of the gears shaft alignment errors with the vibration characteristic, and with the tooth strains as well. For this purpose an experimental set up has been made available to measure the acceleration level, tooth root strains, and to carry out frequency analysis of the gear vibration signals. It was found that at a certain level of gears shaft alignment errors the characteristic of gear vibration were strongly affected by errors. The results demonstrated that for the same amount of error, the gear shaft deviation and gear shaft inclination applied at different sides, i.e., at gear leading side and at gear trailing side, produced different gear vibration characteristics as well as tooth strain values.

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