| US 7,513,747 B2 | ||
| Rotor for a compressor | ||
| René Bachofner, Untersiggenthal (Switzerland); Pietro Grigioni, Ehrendingen (Switzerland); and Wolfgang Kappis, Fislisbach (Switzerland) | ||
| Assigned to ALSTOM Technology Ltd., Baden (Switzerland) | ||
| Filed on May 18, 2006, as Appl. No. 11/419,031. | ||
| Application 11/419031 is a continuation of application No. PCT/EP2004/053114, filed on Nov. 26, 2004. | ||
| Claims priority of application No. 103 57 134 (DE), filed on Dec. 06, 2003. | ||
| Prior Publication US 2006/0228216 A1, Oct. 12, 2006 | ||
| Int. Cl. F01D 5/30 (2006.01) | ||
| U.S. Cl. 416—215 [416/248] | 4 Claims |
| 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.
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