Lubricating system for shaft bearings
AssigneeKlein, Schanzlin & Becker Aktiengesellschaft
InventorsJurgen Schill, Gunther Klein, Wilfried Lenk
Life of this patent
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Abstract
The thrust bearing for the shaft of a boiler feed pump in a nuclear reactor plant is cooled by a first stream of lubricant which is drawn from a sump by an impeller receiving motion from the shaft. The first stream constitutes one branch of a larger second stream which flows from the discharge end of the impeller. A third stream constituting another branch of the second stream is sprayed against and is cooled by the housing of the feed pump. The first and third streams are caused to reenter the sump by gravity flow. The exterior of the housing is provided with heat dissipating ribs.
Claims13
In a fluid flow machine or the like wherein a rotary shaft is subjected to pronounced thermal stresses, the combination of a bearing for the shaft, and a housing and cooling unit for the bearing, said cooling unit comprising a source of liquid lubricant, means in said housing defining a first path extending through the bearing and back to said source, and a second path terminating at said source, means for cooling the lubricant in said second path including a wall of said housing, and pump means for drawing a solid stream of liquid lubricant from said source, raising the pressure of the lubricant, conveying a solid first stream of the liquid lubricant along said first path under pressure, and spraying a second steam of the lubricant against said wall.
Dependencies are inferred from the claim text.