Drying and gas or vapor contact with solids – Process – Gas or vapor pressure varies during treatment
Patent
1993-06-14
1994-07-26
Bennett, Henry A.
Drying and gas or vapor contact with solids
Process
Gas or vapor pressure varies during treatment
34104, 15407, F26B 504
Patent
active
053317475
ABSTRACT:
A hydraulic testing and drying apparatus for a water cooled-stator in an electrical generator. The apparatus is mounted on a sled (10) and comprises an air compressor (16), regenerative air dryer (18), receiver (20), vacuum pump (22) and associated piping and control devices. After the receiver is coupled to the inlet to a stator winding, dry and clean compressed air pressurizes the receiver and stator winding. Pressure activates valves between the compressor and receiver, and at the drain of the stator winding operate so that the pressurized air purges moisture from the stator windings. Through the use of pressure activated switches, cycles of pressurization and purging are run automatically. Hygrometer sensors monitor the dewpoint of the air entering the generator and of the air exhausting from the generator. A vacuum pump (22) creates a vacuum within the stator winding to complete drying and to test the decay of a vacuum in the stator windings.
REFERENCES:
patent: 4986008 (1991-01-01), Falk
patent: 5133136 (1992-07-01), Sykora
"Removal of Water From a Water-Cooled Generator Stator", Bristor, Sep. 19, 1968 (General Electric; 348HA607).
"Removing Water From Liquid Cooled Stator Windings", Racko, Jun. 6, 1978 (General Electric; P24A-AL-5035).
"Automatic Blowdown Procedure", Luther, May 18, 1978 (General Electric).
"Generator Inspection & Test Manual", ES-STM-E3.1, Jun. 1, 1984 (General Electric).
Bennett Henry A.
General Electric Company
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