Sealing system for use in composite multi-stage pump

Details Sealing system for use in composite multi-stage pump Sealing system for use in composite multi-stage pump

1977-08-09

1978-10-24

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 12, 277 70, 277226, 415100, 415112, 417243, 417244, F16J 1540, F01D 1102

Patent

active

041218396

ABSTRACT:
A sealing system for use in a composite multi-stage pump or pumps is disclosed which utilizes part of the liquid pressurized by the pump to moderate sealing conditions by introducing said liquid to a portion or portions around the shaft, where the sealing conditions are most critical, and by thus reducing the pressure imposed on the sealing portion make the designing of seals easy. Also, by introducing pressurized liquid of relatively low temperature to the critical portion(s), minimum flow rate is lowered and thus the operational range of the pump is extended.
When two or more pumps are employed for maintaining continuous operation by alternately switching the working pumps, a flow passage is provided between the pumps so the pressurized liquid from the pump under operation can be introduced to the non-operating pump, thus utilizing the pressurized liquid to prevent liquid kept under pressure in the non-operating pump from leaking therefrom.

REFERENCES:
patent: 1123364 (1915-01-01), Peterson
patent: 1151965 (1915-08-01), Peterson
patent: 1900531 (1933-03-01), Vitu
patent: 1912452 (1933-06-01), Hollander
patent: 1978277 (1934-10-01), Noble
patent: 3297329 (1967-01-01), Smith et al.
patent: 3420434 (1969-01-01), Swearingen
patent: 3718406 (1973-02-01), Onal
patent: 3792935 (1974-02-01), Randell

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