초록 ▼

A shaft seal includes a plurality of axially spaced annular sealing rings which define oil collection channels. A radial drain aperture extends from the bottom of each channel into an interior trough which extends axially to a discharge orifice in a front end wall of the seal. The bottom of the trou

A shaft seal includes a plurality of axially spaced annular sealing rings which define oil collection channels. A radial drain aperture extends from the bottom of each channel into an interior trough which extends axially to a discharge orifice in a front end wall of the seal. The bottom of the trough is downwardly inclined for enhanced gravity flow. A portion of the outer periphery of the seal which projects into the housing is outwardly flared and includes a lower discharge lip to provide a return flow surface which directs return flow of sprayed oil away from the seal.

대표청구항 ▼

A self-draining seal for a rotating shaft, the seal comprising a generally cylindrical body having an axis, a radially outer periphery, a radially inner periphery, an axially inner front end wall and an axially outer rear end wall, means for seating the seal in an aperture of a housing, a plurality

A self-draining seal for a rotating shaft, the seal comprising a generally cylindrical body having an axis, a radially outer periphery, a radially inner periphery, an axially inner front end wall and an axially outer rear end wall, means for seating the seal in an aperture of a housing, a plurality of axially spaced sealing rings on the inner periphery, each sealing ring being continuous and unbroken, the sealing rings contacting the rotating shaft and defining annular collection channels therebetween, one collection channel being adjacent the front axially inner end wall and another channel being adjacent the rear axially outer end wall, means forming a trough in the body, the trough extending axially within the body below the plurality of sealing rings, below the collection channels and radially spaced between each collection channel and the radially outer periphery of the seal, the trough including means forming a discharge orifice in the axially inner front end wall, means forming drain apertures at a bottom of each channel, the trough including a radially outer bottom wall and a radially inner top wall, each drain aperture extending through the radially inner top wall, the transverse cross section of the trough having a width to heighth ratio of at least two to one, whereby a flow path of adequate capacity for the draining of all collection channels is provided.