Skip to Content
Find More Like This
Return to Search

Retention system and method for the blades of a rotary machine

United States Patent

June 4, 2002
View the Complete Patent at the US Patent & Trademark Office
A retention system and method for the blades of a rotary machine for preventing forward or aft axial movement of the rotor blades includes a circumferential hub slot formed about a circumference of the machine hub. The rotor blades have machined therein a blade retention slot which is aligned with the circumferential hub slot when the blades are received in correspondingly shaped openings in the hub. At least one ring segment is secured in the blade retention slots and the circumferential hub slot to retain the blades from axial movement. A key assembly is used to secure the ring segments in the aligned slots via a hook portion receiving the ring segments and a threaded portion that is driven radially outwardly by a nut. A cap may be provided to provide a redundant back-up load path for the centrifugal loads on the key. Alternatively, the key assembly may be formed in the blade dovetail.
Pedersen; Poul D. (Cincinnati, OH), Glynn; Christopher C. (Hamilton, OH), Walker; Roger C. (Piedmont, SC)
General Electric Company (Schenectady, NY)
09/ 863,899
May 24, 2001
This invention was made with Government support under Contract No. DE-FC21-95MC-31176 awarded by the Department of Energy. The Government has certain rights in this invention.