The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 30, 2013
Filed:
Mar. 17, 2010
Sudhir Rajagopalan, Chuluota, FL (US);
Sudhir Rajagopalan, Chuluota, FL (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
A system for locking blades to a rotor of a turbomachine including adjacent pairs of generally axially extending grooves for receiving blades inserted in an axial direction. A circumferential slot is disposed around the periphery of the rotor and a locking device assembly is located in the circumferential slot between an adjacent pair of grooves. The assembly includes a last locking device, a spacer and key member formed of a shape memory alloy. The key member is located in a gap between the last locking device and the spacer. The shape memory alloy key member is heated to cause a transition from a martensite to an austenite phase to cause the key member to engage and press against opposing faces of the last locking device and the spacer to increase a force applied to a respective pair of blades in the adjacent pair of grooves.