Fluid-sealed shaft seal with bores for supplying and discharging

Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member

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Details

277 27, 277 74, 277 75, 277 72FM, 277 961, F16J 1538, F16J 1540, F16J 1548

Patent

active

045237646

ABSTRACT:
A fluid sealed shaft seal has a radial sealing gap formed between radial surfaces of a first seal ring rotating with a shaft, and a second stationary seal ring biased toward the first ring and connected over a packing element to a housing. The stationary seal ring carries at least one sealing fluid supply bore and at least one sealing fluid discharge bore for supplying and discharging sealing fluid to and from the gap, to maintain a gap width. Spiral grooves are provided radially outwardly or radially inwardly of the supply and discharge bores for supplying an auxiliary sealing fluid to establish a high pressure annular area to prevent escape of the sealing fluid from the gap.

REFERENCES:
patent: 2895751 (1959-07-01), Standish
patent: 3109658 (1963-11-01), Barrett et al.
patent: 3527465 (1970-09-01), Guinard
patent: 3804424 (1974-04-01), Gardner

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