Diesel engine water pump with thrust bearing preload

Details Diesel engine water pump with thrust bearing preload Diesel engine water pump with thrust bearing preload

2005-07-19

2005-07-19

Nguyen, Hoang (Department: 3748)

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Casing having tangential inlet or outlet

C415S229000

Reexamination Certificate

active

06918746

ABSTRACT:
An improved diesel engine water pump includes three main features that aid in extending the maintenance free life of the pump. The impeller shaft is carried by tapered roller shaft support bearings of which the impeller bearing has a floating outer race that is urged axially by a preload spring to provide a prescribed axial preload that maintains concentricity of the shaft with the axis and prolongs bearing life. An improved oil seal combines an oil slinger, a stationary deflector and a lip oil seal with a return passage to the engine to more effectively limit oil leakage from the pump. An improved water seal includes pressurized water jets fed from the pump volute that flush wear particles from the water seal surface and increase water seal life. Further details of these features are also disclosed.

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patent: 5482432 (1996-01-01), Paliwoda et al.
patent: 5638931 (1997-06-01), Kerr
patent: 2046372 (1980-11-01), None

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