Turbomachinery seal

A turbomachinery seal (20) attached to annular member (30) which surrounds and rotatably engages a shaft (34). The seal is capable of sealing pressure differentials between a high pressure region (24) and a low pressure region (26) well in excess of 300 psi at relatively low leakage rates. One embod...

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Bibliographic Details
Main Authors BHATTACHARYYA ABHIJIT, MARSCHER WILLIAM D
Format Patent
LanguageEnglish
Published 26.10.2004
Edition7
Subjects
BLASTING
CYLINDERS
ENGINE PLANTS IN GENERAL
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES
PISTONS
SEALINGS
STEAM ENGINES
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:A turbomachinery seal (20) attached to annular member (30) which surrounds and rotatably engages a shaft (34). The seal is capable of sealing pressure differentials between a high pressure region (24) and a low pressure region (26) well in excess of 300 psi at relatively low leakage rates. One embodiment (120) of the seal includes a plurality of confronting plates (128) arranged so as to form an annular structure. Another embodiment (220) includes a plurality of bristle packs (252), each positioned between annular plates (256) having an axial taper (278) adjacent radially inner ends (274). In another embodiment (320) bristles 334' and 334'' extend in axial positive and negative directions so as to create an interleaved bristle structure. In yet another embodiment (720), a plurality of elongate members (450) are embedded within bristles (434). A turbomachine (550) includes seals 520' and 520'' of the invention.
Bibliography:Application Number: US19980127372