Thin faced balanced seal

Details Thin faced balanced seal Thin faced balanced seal

1996-01-11

1998-08-18

Cummings, Scott

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

F16J 1534

Patent

active

057949395

ABSTRACT:
A mechanical seal 30 is disclosed comprising a sleeve 32 which is adapted to be affixed to the shaft 34 of a item of mechanical equipment, together with a rotary component 42 which carries a rotary seal face 44. Two O-ring grooves 46, 48 are provided on the sleeve 32, the first 46 being remote from the rotary seal face 44 and cut somewhat deeper into the sleeve 32 than the second 48. The rotary component 42 has a first region 50 remote from the rotary seal face 44, the inner surface of which has a relatively small diameter and a second region 52 between the first region 50 and the rotary seal face 44, the inner surface of which has a larger diameter. A pair of O-rings 54, 56 are located in the O-ring grooves 46, 48 and seal against the inner surface of the rotary component 42. The net thrust, if any, acting on the rotary component 42 and hence on the rotary seal face 44 tends to close the seal face irrespective of whether the barrier fluid pressure is in excess for less than the product pressure.

REFERENCES:
patent: 5378000 (1995-01-01), Orlowski

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