Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Patent
1991-07-01
1993-03-16
Denion, Thomas E.
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
415111, 4151711, 277 74, 277 75, F01D 1100
Patent
active
051939746
ABSTRACT:
A mechanical seal assembly for use in a pump seal chamber, through which a pump shaft rotates and in which a process fluid is contained by a stationary seal and a rotating seal, converts the velocity head of the circulating process fluid in the seal chamber back to a positive static pressure at the stationary seal and rotating seal faces and ensures a steady film of the process fluid at the seal faces. The mechanical seal assembly converts the velocity head to a positive static pressure through one or more velocity recovery tubes that project outwardly from the pump housing into the sealed chamber, or that project outwardly from the rotating seal into the seal chamber, and communicate with respective passages through the seals and channel the process fluid to the seal faces.
REFERENCES:
patent: 3527465 (1970-09-01), Guinard
patent: 3804424 (1974-04-01), Gardner
patent: 3905605 (1975-09-01), Hubner
patent: 4196911 (1980-04-01), Matsushita
patent: 4383720 (1983-05-01), Ernst
patent: 4706966 (1987-11-01), Lind
patent: 4759553 (1988-07-01), Goodman et al.
patent: 4902197 (1990-02-01), Rhodes et al.
patent: 4961678 (1990-10-01), Janocko
Annex to the International Search Report on International Patent Application No. US 9205546 Dated: Sep. 2, 1992.
BW/IP International, Inc.
Denion Thomas E.
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