Motor-pump set for boreholes and a method of protection relating

Details Motor-pump set for boreholes and a method of protection relating Motor-pump set for boreholes and a method of protection relating

1983-06-01

1985-11-19

Husar, Cornelius J.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

417372, 415111, 415176, F04B 1700

Patent

active

045539090

ABSTRACT:
A motor pump set having two coaxial shafts is provided with a fluid circuit for protecting the rotary packing-gland against any ingress of solid particles such as sand. Pumped fluid is withdrawn from an intermediate space of the pump and returned upstream via a duct within the pump shaft in order to lubricate the bearings as it passes. The fraction of the fluid stream which is discharged from the last bearing flows in the vicinity of the packing-gland and is driven through radial discharge ducts under the action of centrifugal force.

REFERENCES:
patent: 2001172 (1935-05-01), Wintroath
patent: 2043236 (1936-06-01), Conant
patent: 2783400 (1957-02-01), Arutunoff
patent: 2809590 (1957-10-01), Brown
patent: 3022739 (1962-02-01), Herrick et al.
patent: 3288075 (1966-11-01), Lung
patent: 3850550 (1974-11-01), Kaessen
patent: 3975117 (1976-08-01), Carter

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