Patent ID: 7703746
Filing Date: 2010-04-27
Classification: F16C

Abstract:
1. A hot gas valving system for a ground-based power generation system, the hot gas valving system comprising: a gas flow conduit having a wall and defining a path for fluid flow; and a butterfly valve located in the wall of the gas flow conduit and transversely across the path for fluid flow, the butterfly valve comprising, a first raceway defined by an inner ring and a cooperatively associated outer ring, a second raceway defined by an inner ring and a cooperatively associated outer ring, a combination of ball bearings and roller bearings retained in the first raceway and the second raceway, an axle rotatably mounted in the inner rings of the first raceway and the second raceway and cooperably rotatable therewith, and a baffle mounted longitudinally along a length of the axle and extending from the axle into the path of fluid flow; wherein upon rotation of the axle, the baffle restricts or permits fluid flow; and wherein the combination of ball bearings and roller bearings accommodates both an axial load on the axle and a radial load on the axle.