Apparatus and method for suspending a stator core of an electric generator
AssigneeALSTOM Technology Ltd
InventorLeif Jonson
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AssigneeALSTOM Technology Ltd
InventorLeif Jonson
Estimating the term…
An apparatus and method for suspending a stator core (100) in an electric generator upon a foundation (206), where two natural modes of vibration, including known second and third modes, are excited in the core, each mode having four loops and four nodes displaced 45 degrees between the second and third modes. A non-rigid connection (212) connects a yoke to the foundation, and two connection members connect the yoke to the stator core at opposite sides of the non-rigid connection. The two connection points (210a,b) are located at adjacent loops of one of the second and third vibration modes. By this arrangement, radial deflections of the stator core at the respective connection points are transferred into a rocking movement of the yoke around the non-rigid connection. Thereby, vibrations transferred to the foundation are considerably reduced during operation.
A suspension apparatus for suspending a ring-shaped or tube-shaped stator core (100) in an electric generator upon a foundation (206), wherein natural modes of vibration are excited in the stator core during operation, including a known second vibration mode with four circumferentially distributed loops (L1) and four nodes (N1) being displaced 45 degrees from the loops (L1), and a known third vibration mode with four loops (L2) and four nodes (N2) displaced 45 degrees in relation to the loops (L1) and nodes (N1) of the second vibration mode, characterised by:
A method of suspending a ring-shaped or tube-shaped stator core (100) in an electric generator upon a foundation (206), wherein natural modes of vibration are excited in the stator core during operation, including a known second vibration mode with four circumferentially distributed loops (L1) and four nodes (N1) being displaced 45 degrees from the loops (L1), and a known third vibration mode with four loops (L2) and four nodes (N2) displaced 45 degrees in relation to the loops (L1) and nodes (N1) of the second vibration mode, characterised by the steps of:
Dependencies are inferred from the claim text.