US Patent:
20050287006, Dec 29, 2005
Inventors:
Carlo Roso - Farmington KY, US
Gary Owens - Bardwell KY, US
Assignee:
Ingersoll-Rand Company - Montvale NJ
International Classification:
F03B001/02
Abstract:
A rotor assembly for a turbomachine includes an impeller, a shaft, a bolt, and a compliant spacer. The impeller has an opening extending in an axial direction and a stem with an outer surface having a tapered profile in a cross section including the axis and a non-circularly symmetric profile in a cross section perpendicular to the axis. The shaft includes a bore that is configured to receive and engage the impeller stem. The bolt connects the impeller to the shaft, and the compliant spacer is located between a first surface of the shaft and a first surface of the impeller, wherein the compliant spacer substantially conforms to the first surface of the shaft and to the first surface of the impeller when the bolt is tightened to a predetermined torque value.