FIELD: contactless seals; devices for avoidance of admission of fluid into structural members; high-speed revolving shafts.
SUBSTANCE: proposed contactless end seal has fixed body with circular grooves and shaft with discs mounted in it; discs of this shaft are received by grooves forming labyrinth slot; circular grooves are concentric relative to shaft axis. Discs are made in form of concentric fins mounted on end face of rotor secured on shaft. Width of peripheral groove exceeds width of other grooves; web of fin received by it has radial holes or slots smoothly distributed over circumference. Besides that, one radial hole (or bottom of slot) lies in plane of bottom of recess formed between circular fins of rotor.
EFFECT: simplified construction; ease of servicing; reliable tightness of electric motor revolving shaft.
2 cl, 3 dwg
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