Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1993-01-14
1995-08-22
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 41, 277 81R, 277 82, F16J 1534
Patent
active
054432740
ABSTRACT:
A stationary sealing ring (6) surrounds a rotatable shaft (2) and is fitted to, and held by, a cylindrical guide (1a) of a seal case (1). An extremely small clearance is provided between the outer peripheral surface (6b) of the stationary sealing ring and the inner peripheral surface (1c) of the guide. This small clearance prevents radial displacement of the ring but allows the ring to move in the axial direction and permits the passage of a fluid. Because the sealing ring is held without the use of a holding ring or an O-ring, the concentricity and parallelism of the stationary sealing ring to a rotary sealing ring (3) can be continuously maintained despite pressure fluctuations. Clearance between the stationary sealing ring and a holding ring (4) is maintained by an O-ring (9) held in an annular dovetail groove (10) formed in a surface (4c) of the holding ring facing the stationary sealing ring. The O-ring serves as a strain isolator which prevents the transmission of thermal and pressure strains between the holding ring and the stationary sealing ring.
REFERENCES:
patent: 3582090 (1971-06-01), Lott
patent: 3715169 (1973-02-01), Molis
patent: 4406466 (1983-09-01), Geary, Jr.
patent: 4586719 (1986-05-01), Marsi et al.
patent: 4625977 (1986-12-01), Azibert et al.
patent: 4768790 (1988-09-01), Netzel et al.
patent: 5026076 (1991-06-01), Back
DePumpo Daniel G.
Nippon Pillar Packing Co. Ltd.
LandOfFree
Non-contact mechanical seal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-contact mechanical seal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-contact mechanical seal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2136694