27 July 2016 GMT azimuth bogie wheel-rail interface wear study
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Abstract
Performance of the GMT azimuth drive system is vital for the operation of the telescope and, as such, all components subject to wear at the drive interface merit a high level of scrutiny for achieving a proper balance between capital costs, maintenance costs, and the risk for downtime during planned and unplanned maintenance or replacement procedures. Of particular importance is the interface between the azimuth wheels and rail, as usage frequency is high, the full weight of the enclosure must be transferred through small patches of contact, and replacement of the rail would pose a greater logistical challenge than the replacement of smaller components such as bearings and gearmotors. This study investigates tradeoffs between various wheel-rail and roller-track interfaces, including performance, complexity, and anticipated wear considerations. First, a survey of railway and overhead crane industry literature is performed and general detailing recommendations are made to minimize wear and the risk of rolling contact fatigue. Second, Adams/VI-Rail is used to simulate lifetime wear of four specific configurations under consideration for the GMT azimuth wheel-rail interface; all studied configurations are shown to be viable, and their relative merits are discussed.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jose Teran, Jose Teran, Cory Lindh, Cory Lindh, Chris Morgan, Chris Morgan, Eric Manuel, Eric Manuel, Bruce C. Bigelow, Bruce C. Bigelow, William S. Burgett, William S. Burgett, } "GMT azimuth bogie wheel-rail interface wear study", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99062P (27 July 2016); doi: 10.1117/12.2230989; https://doi.org/10.1117/12.2230989
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