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US 4,305,592 AGranted
Gas seal bushing
AssigneeTransamerica DeLaval Inc.
InventorHaakon O. Peterson
Life of this patent
Estimating the term…
Abstract
An improved pressure seal assembly for rotary machinery. The assembly utilizes a buffer oil flowing through a seal ring surrounding the rotating shaft of the machinery. The seal ring includes a plurality of openings about its periphery to pass the oil through the ring to a number of bearing pads. The oil serves to cool, lubricate, seal and damp the seal ring. The assembly reduces oil loss to the pressurized environment to a minimum.
Claims6
A pressure seal assembly, utilizing an external supply of a fluid barrier such as oil at a pressure differential from that of the pressure to be sealed, for a rotating shaft comprising:
- a one-piece stationary ring surrounding said shaft;
- said ring including a portion proximate to the highpressure side of said shaft having windback grooves on the surface adjacent to said shaft to direct said fluid barrier in a predetermined direction;
- said ring including a portion with at least one bearing pad proximate to the low-pressure end of said shaft;
- said ring having an annular space disposed between said windback grooves and said bearing pad;
- and
- a plurality of channels in said ring adjacent to said windback grooves communicating between said external supply of said fluid barrier and said annular space, said fluid barrier first flowing through said channels to cool said windback grooves, thereafter passing into said annular space to flow towards said windback grooves and said bearing pad, said windback grooves resisting the flow of said fluid barrier.
3 more elements
Dependencies are inferred from the claim text.