초록 ▼

A seal is provided around a shaft extending through a cavity in a hydrogen cooled generator. The seal includes a plurality of brush seal structures adapted to reduce flow to/from the cavity to a level where the risk of creating an explosive mixture of gases is minimized. In an embodiment of the inve

A seal is provided around a shaft extending through a cavity in a hydrogen cooled generator. The seal includes a plurality of brush seal structures adapted to reduce flow to/from the cavity to a level where the risk of creating an explosive mixture of gases is minimized. In an embodiment of the invention, a series of brush seals are provided to interface with the rotary shaft so as to define a seal for minimizing the flow of hydrogen out of the cavity. In one preferred embodiment, the seal is composed of first and second brush seal assemblies, each of which is comprised of a plurality of brush seal structures. In another embodiment, spring(s) are provided to urge the brush seal structures into sealing engagement with the rotor. If deemed necessary or desirable, a vent outlet is provided in a cavity wall remote from the hydrogen atmosphere, to remove hydrogen that has leaked through the brush seals.

대표청구항 ▼

A seal is provided around a shaft extending through a cavity in a hydrogen cooled generator. The seal includes a plurality of brush seal structures adapted to reduce flow to/from the cavity to a level where the risk of creating an explosive mixture of gases is minimized. In an embodiment of the inve

A seal is provided around a shaft extending through a cavity in a hydrogen cooled generator. The seal includes a plurality of brush seal structures adapted to reduce flow to/from the cavity to a level where the risk of creating an explosive mixture of gases is minimized. In an embodiment of the invention, a series of brush seals are provided to interface with the rotary shaft so as to define a seal for minimizing the flow of hydrogen out of the cavity. In one preferred embodiment, the seal is composed of first and second brush seal assemblies, each of which is comprised of a plurality of brush seal structures. In another embodiment, spring(s) are provided to urge the brush seal structures into sealing engagement with the rotor. If deemed necessary or desirable, a vent outlet is provided in a cavity wall remote from the hydrogen atmosphere, to remove hydrogen that has leaked through the brush seals. 1 wherein said upper jigsaw layer is disposable above said first layer in the same configuration as said first layer and, its position within said cavity may be exchanged with that of other layers, where the layer may be disposed below or above the base surface when assembled, so that it may not lie flush with the base surface; noting that if all layers are returned to the cavity, the final or topmost layer will be flush with the base surface. 6. The puzzle of claim 1 wherein at least one layer includes at least one blank, unpainted jigsaw piece cut in complete form, e.g., lamb, horse, for painting or drawing upon by a user. 7. The puzzle of claim 1 wherein at least one said layer comprises a complete, unpainted blank layer for the painting in of a scene by a user. 8. The puzzle of claim 1 wherein said layers can be placed in the base cavity in alternative positioning, e.g., layer 1 is placed as layer 3 and layer 2 as layer 1, and so on, noting that if all layers are returned to the cavity, the final or top-most layer will be flush with the base surface. 9. Multiples of the puzzle of claim 1 are bonded together by a hinge mechanism, i.e., book binding material, multiple mechanical hinges or other similar devices, and a cover added which is also hinged by one of the aforementioned methods to form a book with a cover added, wherein the outside of the cover would hold the title of the story, with the text of the story beginning on the inside, e.g., back, of the cover and, continuing on the back of each succeeding multi-layer puzzle, e.g., page, with the story ending on the back of the last interior puzzle page. 10. The puzzle of claim 9, e.g., a multi-layer puzzle joined with other multi-layer puzzles of claim 1 to form a book with a cover where, one or more puzzle pieces are cut to include the full subject, e.g., lamb, horse, to comprise a single play element, i.e., individual toy, enabling the user to remove said play element from the puzzle so that the user may act out the story in the book.