TURBOMACHINE ROTOR

• US 3,625,634 A
• Filed: 12/10/1969
• Issued: 12/07/1971
• Est. Priority Date: 12/10/1969
• Status: Expired due to Term

• Current Assignee: Rowland L. Stedfeld
• Original Assignee: Rowland L. Stedfeld
• Inventors: Stedfeld, Rowland L.
• Primary Examiner(s): Powell, Jr., Everette A.
• Application Number:
  US04/883,920
• Time in Patent Office: 727 Days
• Field of Search: 416/230,201,244,245,198,200,196,218
• US Class Current: 416/198.00R
• CPC Class Codes: F01D 21/045 special arrangements in stators or in rotors dealing with breaking-off of part of rotor
• CPC Class Codes: F01D 5/06 Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections F01D5/022, F01D5/023 take precedence

Abstract

A turbomachine rotor comprises a number of rings forming a drum with end bells at the ends of the drum. Each ring mounts a row of blades with roots which extend through openings in the ring and which are brazed or welded to retain them on the ring. Rings of fibrous composite wrap extend around the blade mounting rings between the rows of blades. The rings may be welded together.

Claims

1. An axial-flow turbomachine rotor drum comprising, in combination, a plural number of open-centered metal rotor rings arranged coaxially in successive abutting relationship to define a rotor drum, each rotor ring including a blade mounting portion and a flange portion extending axially from the blade mounting portion, a ring of blades mounted on and fixed to each blade mounting portion, the blades having airfoil-contoured roots and the mounting portion defining airfoil-contoured holes receiving the blade roots, a fiber-reinforced tensile wrap disposed on the outer surface of each flange portion, the flange portion overlapping the exterior of the blade mounting portion of an adjacent rotor ring, the roots of the blades having spanwiseextending flutes thereon defining shallow recesses between the flutes, and braze metal within the recesses fixing the blades to the rotor rings.