Pump shaft sealing system

Details Pump shaft sealing system Pump shaft sealing system

1996-08-23

1999-04-13

Kwon, John T.

Rotary kinetic fluid motors or pumps

With lubricating, sealing, packing or bearing means having...

415113, 415118, 277 27, 277 35, F04D 2908

Patent

active

058937030

ABSTRACT:
For a pump that produces a negative pressure in a pump casing, a shaft seal system comprises a positive flow of air into the seal system to flow about shaft seals to counteract the negative pressure otherwise being communicated thereto from within the pump casing. The seals engage the rotating shaft and a lubrication passageway supplies lubricant to the shaft seals engaging the rotating shaft, which is driving the rotor. Preferably, no air flows through the seal system when the rotor shaft is stationary and a small air flow, e.g., 0.3 c.f.m. to 1 c.f.m., flows through the shaft seal when the shaft is rotating. This flow rate is preferably monitored.

REFERENCES:
patent: 2448717 (1948-09-01), Jeffcock
patent: 2903970 (1959-09-01), Ellovitz et al.
patent: 4063743 (1977-12-01), Petros
patent: 4776753 (1988-10-01), Weinrib
patent: 4984811 (1991-01-01), Kuwabara et al.
patent: 5098256 (1992-03-01), Smith

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