Abstract: Disclosed herein is a packing ring assembly including a packing ring segment, a bar, a cover plate, and a spring. The packing ring segment has an axial slot. The bar is disposed within the slot. The cover plate is disposed along an outer periphery of the packing ring segment. And, the spring is compressed between the bar and the cover plate.

Abstract: Disclosed herein is a packing ring assembly including a packing ring segment, a bar, a cover plate, and a spring. The packing ring segment has an axial slot. The bar is disposed within the slot. The cover plate is disposed along an outer periphery of the packing ring segment. And, the spring is compressed between the bar and the cover plate.

Abstract: An abradable coating and/or an abrasive coating applied to the rotor of a steam or gas turbine allows the temperature and pressure drop capabilities of conventional brush seal assemblies to be increased. The pressure drop capability of brush seals is closely related to fence height, i.e., the distance between the rotor and the bottom edge of the backing plate supporting the brush seal wire bristles. Application of the abradable or abrasive coating allows the fence height to be reduced and the pressure capability of a brush seal assembly increased commensurately because the risk of the backing plate rubbing against the surface of the rotor, so as to cause damage to the rotor, is reduced. In addition, the backing plate can be made from a higher strength material that can withstand higher temperatures because any contact between the backing plate and the rotor results in no damage to the rotor, but rather a gradual reduction of the backing plate as it wears.

Abstract: A seal between rotary and stationary turbine components includes an abradable coating on the surface of the stationary component between axially spaced caulked-in seal strips. The rotatable component includes a plurality of axially spaced teeth interdigitated with the teeth of the stationary component and engaging the abradable coating on the stationary component in the cold condition of the turbine. The teeth on the stationary component have larger clearances to prevent mushrooming of the tips in the event of a transient condition. By utilizing caulked-in teeth, a larger number of seal teeth are provided for the same axial extent as compared with conventional labyrinth seal teeth.

Abstract: A turbine comprises an oil deflector including at least one set of seal rings, and a shaft including an annular step. The step includes a circumferential surface in proximity to the seal rings of the oil deflector and a side surface extending radially from a center portion of the shaft and defining a groove positioned radially underneath the circumferential surface.