Pump and seal arrangement to prevent leakage due to fluid boilin

Details Pump and seal arrangement to prevent leakage due to fluid boilin Pump and seal arrangement to prevent leakage due to fluid boilin

1996-03-25

1998-10-27

Verdier, Christopher

Rotary kinetic fluid motors or pumps

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

For shaft sealing, packing, lubricating or bearing means

415111, 415113, 415 582, F04D 2912, F04D 2916

Patent

active

058270418

ABSTRACT:
A fluid pump having a pump body defining a pump cavity and a pump shaft rotatable on a bearing in the cavity, wherein the pump cavity contains a seal in a closed chamber between the pump body and the shaft, and the cavity is characterized by a first zone for high pressure pump discharge fluid, a second zone for low pressure pump inlet fluid, and an interconnecting passage which supplies fluid from the high pressure zone to a third zone, which exists at an intermediate pressure surrounding the pump seal and discharges its fluid into the low pressure zone, the intermediate pressure being sufficient to prevent fluid boiling and cavitation by insuring that the pumped fluid does not exceed its vapor pressure point.

REFERENCES:
patent: 1474454 (1923-11-01), Telfer
patent: 2331641 (1943-10-01), Walker
patent: 2741991 (1956-04-01), Disbrow
patent: 3070028 (1962-12-01), Loy et al.
patent: 4621981 (1986-11-01), Lorett
patent: 5156522 (1992-10-01), Tessier

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