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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
1. Explain why the number of teeth on the ring gear in a planetary geartrain is related to the sizes of the sun and planet gears by the equation Nr = Ns + 2Np.
2. A planetary geartrain with Ns = 48 and Np = 30 uses the carrier and ring gear as inputs and the sun gear as output. When viewed from the right-hand side in Figure 8.36, the hollow carrier shaft is driven at 1200 rpm clockwise, and the shaft for the ring gear is driven at 1000 rpm counterclockwise.
(a) Determine the speed and rotation direction of the sun gear.
(b) Repeat the calculation for the case in which the carrier is instead driven counterclockwise at 2400 rpm.
Figure 8.36

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