Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1991-03-15
1992-08-11
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
271 25, 271 58, 271153, F16J 1532
Patent
active
051372851
ABSTRACT:
The sealing system consists of a commercially-available shaft seal (2), having a covering ring (3) to protect the shaft seal dirt and from exposure to the atmosphere. The covering ring (3) pre-arranged separately outside the conventional flexible shaft seal (2) and is made of a material which is specially suited for drying running, having high strength values and low internal damping, and is designed with a Z or S-shaped intermediate wall (6) which has a radially elastic action. The seal gap (8) is covered, on the side exposed to contamination, first by a scraper lip (12) having radial preloading, and then by a cylindrical jacket region (10) of a guide ring (16) so that the lip (12) can follow the eccentric movements of the rotating machine part (1). The guide ring (16), which is fitted axially in relation to the scraper lip (12), is designed with a cylindrical jacket region (10) that surrounds the rotating machine part (1) as closely as possible and thus entrains the scraper lip ( 12) without any significantly increased distortion or radial deflections even in the event of eccentric or oscillating movements. The radial elasticity of the seal ring during oscillating movements, is ensured by using appropriate design expedients, such as axial notches (13, 14), or a thin intermediate wall (6) between the inner guide ring (16) and outer support ring (7), which is held firm against rotation and axial movement, and by the S or Z-shaped cross-section.
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Simrit-Metalastik Merkbuch 1960.
Cuchlinski Jr. William A.
DePumpo Daniel G.
Zahnradfabrik Friedrichshafen AG
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