Heated mill drive system
AssigneeDominion Engineering Works Limited
InventorsRobert M. Vadas, Marvin B. Shaver
Life of this patent
Estimating the term…
Abstract
A rotatable drum apparatus for use with a drying kiln or a dry grinding mill has a large gear wheel secured to the periphery of the drum, the drum being heated. In order to minimize the generation of undue stresses between gear wheel and drum due to thermal gradients, the apparatus includes a stationary heat shield extending about the gear in thermal stabilizing relation therewith. The arrangement includes air pressurization within the shield and seal means between stationary and rotary components, to limit the loss of heated air from the enclosure, and to preclude the ingress of air and foreign particles into the enclosure.
Claims6
In a rotatable mill apparatus having a heated drum rotatably mounted for rotation about the polar axis of the drum, including a large gear wheel for driving the drum and physically attached to the outer circumference of the drum in torque transmitting relation therewith, the improvement comprising gear guard means including heat insulation means extending about the gear in substantially shrouding relation therewith having seal means to limit air transfer therepast and heating means for heating the gear wheel and the interior of the gear guard.
In a rotatable mill apparatus having a heated drum rotatably mounted for rotation about the polar axis of the drum, including a large gear wheel for driving the drum and physically attached to the outer circumference of the drum in torque transmitting relation therewith, the improvement comprising gear guard means extending about the gear in substantially shrouding relation therewith having seal means to limit air transfer therepast, heating means for heating the gear wheel and the interior of the gear guard, and pressurized air supply means to provide air leakage outwardly past said seal means.
Dependencies are inferred from the claim text.