Siemens Energy, Inc.

Siemens Westinghouse Power Corporation

Siemens Power Generation, Inc.

Stephen Thomas Soto

Randy Edward Whitener

William Cannon Gardner

Jiping Zhang

Peter Jon Clayton

Kevin Michael Light

Larry L Zeller

David Earl Hulsey

Robert R Messel

Robert W Ralph

Christian T Schneider

Mark A Grobe

Neil R Smith

James V Johnson

Robert F Lemke

A winding for a rotor for use in an electrical generator utilized in the power generation industry. The winding includes a plurality of axial sections and a plurality of transversely oriented end arc sections. An integrated leg section extends from each end arc section to form an associated corner section at an intersection of each leg section and associated end arc section. Each leg section is affixed to an associated axial section at a joint that is spaced apart from an associated corner section such that the joint is not subjected to stress concentration which occurs at the associated corner section.

Rotor winding having a braze joint spaced apart from stress concentration

A system for securing a nut () used to compress a compliant seal () surrounding a radial conductor lead () of an electric generator (). The generator has a rotor () with the radial conductor lead arranged in a radial lead bore () of the rotor and the seal coaxially arranged surrounding the radial lead. A receiving pocket () is arranged in a body of the rotor adjacent to the radial lead bore. The nut is arranged coaxially with the radial conductor lead, the nut including a seal contacting surface () and a ligament () arranged opposite the seal contacting surface, wherein a portion of the ligament is deformed into the receiving pocket to lock the nut against rotation, thereby maintaining a desired degree of compression on the seal.

Nut securing arrangement for electrical generator

An interconnecting assembly () for a rotor assembly of a dynamoelectric machine is provided. The interconnecting assembly may be part of an electrically conductive path generally extending from a radially inward section of the rotor assembly to a top winding of a stacked winding () located at a radially outward section of the rotor assembly. The interconnecting assembly may include a first connecting member () connected to a radial lead () at the inward section of the rotor assembly. This first connecting member is made up of multiple conductive leaves and includes a flexible bend () positioned to provide a resilient-connection relative to at least a radial direction. The interconnecting assembly may further include a second connecting member () mechanically connected to the first connecting member by way of the resilient connection. This second connecting member is electrically connected to the first connecting member and to the top winding. The second connecting member may include a stiffener () for providing support relative to an outer portion of the bend to increase stiffness and prevent buckling of the bend due to a centrifugal force that develops during operation of the machine.

Generator rotor conductive path for connecting to a top-turn of a winding

A dynamoelectric machine includes a rotor assembly and a main lead insulating assembly . The rotor assembly includes a shaft having a main lead receiving recess in its outer surface, a rotor mounted to the shaft , and a stator surrounding the rotor . The main lead insulating assembly lines the main lead receiving recess and includes at least one insulating bottom block axially secured to the shaft and at least one insulating sidewall block secured to the at least one insulating bottom block with at least one interlocking joint . A main lead is received in the main lead insulating assembly

Dynamoelectric machine including insulator and associated methods

A method for repairing stress-induced cracks in a generator rotor keyway is disclosed. The method comprises disassembling the retaining ring and ring key from the rotor, and machining away the crack and surrounding rotor metal from the rotor keyway. The machining step may be performed in a lathe or milling machine. This method diminishes the labor cost, equipment cost, and down time required for crack repairs because the slot contents may remain in the slots during the entire repair process. A spacer ring and an enlarged key that may be inserted into the machined, enlarged keyway are also disclosed.

Generator rotor and method for eliminating keyway stress cracks in same

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Maitland, FL, United States of America

Stephen Thomas Soto