Positive drive compensating shaft seal

Details Positive drive compensating shaft seal Positive drive compensating shaft seal

F - Mech Eng,Light,Heat,Weapons

16

J

F16J 15/38 (2006.01) F16J 15/24 (2006.01)

Patent

CA 2164630

A compensating positive drive rotary shaft seal assembly comprises a two-part housing (11, 12), each housing part including a radially directed stator surface (30, 31) surrounding the shaft (S). A collar (33) is keyed to the shaft between the stators, and an axially shiftable rotor (37, 38) is interposed between the collar and each stator. The rotors an positively coupled to the collar for rotation with the shaft. An elastomeric annular seal (55) is mounted on the shaft between each rotor and the collar. The housing parts are axially shiftable toward and away from each other adjustably to compress the elastomeric seals and yieldably bias the rotor against the stators. An internal annular gasket (25) spanning the housing parts encompasses the seal assembly and defines a sealed chamber coupled to one or more purge ducts (29).

Un agencement de joint d'étanchéité à compensation d'un arbre d'entraînement direct comprend un logement en deux parties (11, 12), chaque partie de logement ayant une surface de stator (30, 31) dirigée radialement entourant l'arbre (S). Un collier (33) est claveté à l'arbre entre les stators et un rotor déplaçable axialement (37, 38) est disposé entre le collier et chaque stator. Les rotors sont couplés directement au collier pour rotation avec l'arbre. Un joint d'étanchéité annulaire en élastomère (55) est monté sur l'arbre entre chaque rotor et le collier. Les parties de logement sont déplaçables axialement pour se rapprocher ou s'éloigner d'une manière ajustable en comprimant les joints en élastomère et elles pressent élastiquement le rotor contre les stators. Une garniture annulaire interne (25) joignant les deux parties du logement entoure l'agencement de joint d'étanchéité et délimite une chambre étanche reliée à une ou plusieurs conduites (29) de purge.

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