Integral composite nozzle-shield assembly for a gas-cooled dynam

Details Integral composite nozzle-shield assembly for a gas-cooled dynam Integral composite nozzle-shield assembly for a gas-cooled dynam

1978-06-07

1980-06-17

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 53, H02K 518

Patent

active

042085993

ABSTRACT:
An integral nozzle-shield assembly for a gas-cooled dynamoelectric machine such as a large turbine-driven generator is described. The nozzle-shield assembly is formed of a non-conductive, non-magnetic material such as molded fiberglass and resin and serves to channel hydrogen gas between a heat exchanger and a rotor-mounted fan used to pump the gas through coolant passages in the dynamoelectric machine, and the assembly also provides a labyrinth seal over the fan blade tips. In one embodiment, the nozzle-shield assembly includes two 180-degree halves whose thickness varies circumferentially and which may be installed in a generator by bolting their outer edges to a stator frame member of the generator and bolting the halves together at the two radial joints between halves using flat metal plate connectors. Use of a material such as fiberglass and resin to form an integral nozzle-shield assembly results in a structure which is not susceptible to eddy current losses or damage due to arcing, and this integral assembly is readily fabricated and easy to install in a dynamoelectric machine.

REFERENCES:
patent: 2920218 (1960-01-01), Beckwith
patent: 3110827 (1963-11-01), Baudry
patent: 3271600 (1966-09-01), Philofsky
patent: 3497737 (1970-02-01), Philofsky
patent: 3739208 (1973-06-01), Sharthand
patent: 3818256 (1974-06-01), Ying
patent: 4039872 (1977-08-01), Armor
patent: 4071791 (1978-01-01), Armor

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