Mechanism for forming a seal around the shaft of a liquid pump

Details Mechanism for forming a seal around the shaft of a liquid pump Mechanism for forming a seal around the shaft of a liquid pump

1998-04-09

2000-08-08

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

277443, 277938, F16J 926

Patent

active

060989882

ABSTRACT:
A mechanism for forming a liquid-tight seal around the rotary shaft of a liquid pump having a stationary ring attached to the casing of the pump and a rotating ring attached to the rotary shaft and contacting the stationary ring. The stationary ring is formed from baked carbon, while the rotating ring is a sintered product of silicon nitride. The stationary ring has an effective seal width ratio, rp/Di, of 0.07/1 to 0.22/1, where rp is the width of the effective seal surface of the stationary ring and Di is its inside diameter.

REFERENCES:
patent: 4632150 (1986-12-01), Gagas
patent: 4681817 (1987-07-01), Shinada
patent: 4693481 (1987-09-01), Quinn
patent: 4751871 (1988-06-01), Burghardt et al.
patent: 5037276 (1991-08-01), Tremoulet, Jr.
patent: 5549462 (1996-08-01), Mischler et al.

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