| 摘要 |
PROBLEM TO BE SOLVED: To provide a seal for a hydrogen cooled generator which can substantially prevent diffusion and mass transfer to a seal cavity of hydrogen atmosphere, by comprising a rotor and a housing wall which provides the hydrogen atmosphere in the one side and provides, in the opposite side, the seal cavity in which the hydrogen purity is lower than that of the hydrogen atmosphere. SOLUTION: A casing (30) is provided at the intermediate area between a bearing cavity (22) of the hydrogen cooled generator and a seal cavity (52). A oil deflector seal (50) is provided intermediate an interval cavity filled with the hydrogen and the seal cavity of the generator. Combination of a brush seal (54) or brush seal/labyrinth seal forms an oil deflector seal between a hydrogen cavity and seal cavity to substantially prevent or minimize diffusion and mass transfer of hydrogen and lubricant across this seal. The brush seal may be provided as an original equipment or as a retrofit in lieu of existing labyrinth to seal teeth. The brush seal maintains the hydrogen atmosphere of the generator cavity and lesser hydrogen purity atmosphere in the seal cavity substantially segregated from one another, whereby reduced hydrogen consumption is provided.
|
