Dynamic blocking restraint of a rotor field winding contained by a non-metallic structural rotor enclosure
First Claim
1. A dynamic blocking restraint assembly for field windings of a generator rotor winding module contained by an enclosure, the dynamic blocking restraint assembly comprising:
- a first support block engageable with a rotor field winding;
a first spring disposed engaging the first support block;
a second support block engageable with an adjacent rotor field winding;
a second spring disposed engaging the second support block; and
a wedge disposed between the first spring and the second spring.
1 Assignment
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Accused Products
Abstract
The conventional bar by bar assembly of a generator rotor can be replaced with a solid rotor having parallel slots milled into a rotor forging so that containment components can be replaced with a simplified enclosure. A dynamic blocking restraint assembly is beneficial to control winding position, to prevent load dissymmetries against the winding enclosure, and to provide sufficient preload to obtain predictable behavior in all expected modes of operation. The blocking assembly includes a sandwich construction of a first support block, at least one spring, additional wedge-shaped spacers in the case of multiple springs, and a second support block disposed in a symmetrical arrangement substantially aligned with the quadrature axis of the rotor. The assembly serves to provide circumferential restraint and to match the structural hoop stiffness of the winding enclosure. The construction of components can be configured to accommodate any desired degree of preloading.
28 Citations
15 Claims
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1. A dynamic blocking restraint assembly for field windings of a generator rotor winding module contained by an enclosure, the dynamic blocking restraint assembly comprising:
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a first support block engageable with a rotor field winding;
a first spring disposed engaging the first support block;
a second support block engageable with an adjacent rotor field winding;
a second spring disposed engaging the second support block; and
a wedge disposed between the first spring and the second spring. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A generator rotor comprising:
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a multi-pole magnetic core and a plurality of core assemblies, one for each pole, the core assemblies defining a winding module having a plurality of field windings;
an enclosure housing the core and the core assemblies; and
a dynamic blocking restraint assembly disposed between adjacent first and second field windings, the dynamic blocking restraint assembly comprising;
a first support block engaging the first field winding, a first spring disposed engaging the first support block, a second support block engaging the second field winding, a second spring disposed engaging the second support block, and a wedge disposed between the first spring and the second spring. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification