Patent ID: 7513747
Filing Date: 2009-04-07
Classification: F01D,F04D,F05D

Abstract:
1. A compressor with a rotor, said rotor having predetermined material characteristics and said compressor having predetermined operating conditions, said predetermined material characteristics and operating conditions defining a compressor-specific minimum recess depth for a circumferential, rotor-blade-receiving recess in said rotor, such that the rotor has sufficient initial strength in the area of the blade attachment, said rotor comprising: a circumferential recess including side walls and two shoulders formed in said side walls, each shoulder having a shoulder depth; a plurality of rotor blades arranged as a rim around a rotation axis of the rotor, each blade including a blade root which holds the rotor blades in the rotor circumferential recess; wherein each blade root includes a widening lower part which engages behind the two shoulders of the side walls; wherein the depth of the recess is at least 10% greater than said compressor-specific minimum recess depth; and wherein the shoulder depth is sized to correspond to the recess depth, and wherein the rotor blade roots are sized to correspond to the recess depth.