Mechanical seal assembly with integral pumping device

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

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277 22, 277 59, 277 65, 277134, F16J 1534, F16J 1540

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active

044666195

ABSTRACT:
A double or tandem mechanical seal construction having as an integral part thereof a pumping structure for effecting circulation of buffer fluid. The shaft sleeve is provided with surface irregularities thereon, such as a series of circumferentially spaced slots, so that the shaft sleeve functions as a pumping rotor. The surrounding seal stator has supply and discharge ports extending radially therethrough, which ports extend substantially tangentially with respect to the shaft sleeve so that the latter, due to its rotation, will effectively pump and hence circulate the cooling or buffer fluid through the buffer chamber.

REFERENCES:
patent: 2230881 (1941-02-01), Browne
patent: 3081095 (1963-03-01), Hamrick
patent: 3746350 (1973-07-01), Mayer et al.
patent: 3888495 (1975-06-01), Mayer
patent: 3937477 (1976-02-01), Gyory
patent: 4010960 (1977-03-01), Martin
patent: 4108569 (1978-08-01), Rydall et al.
patent: 4243230 (1981-01-01), Baker et al.

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