Title: Fluid seal for rotating shafts

Abstract: An improved fluid seal for a rotating shaft is provided which includes an inner annular ring or runner adapted to be secured to the rotating shaft and a composite sealing ring which is keyed to the inner ring and includes a radial sealing surface. An outer, nonrotating, annular ring or housing which is concentrically disposed with respect to the runner and sealing ring, includes a radial sealing surface which sealingly engages the sealing surface of the sealing ring. A circular wave spring, which is anchored to the housing and is disposed between the composite sealing ring and a snap ring secured to the housing, provides an axial force which forces the two sealing surfaces into sealing contact. The waves of the spring act as individual hydrodynamic bearings, and the axial force is transmitted across an oil film. This eliminates rubbing contact and the need for a separate thrust bearing.

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Inventors: Ludwig, Lawrence P. (Fairview Park, OH, US)

Application Number: 551184
Filing Date: 1975-02-19
Publication_date: 1976-04-27
Assignee: The United States of America as represented by the United States (Washington, DC)
Primary Class(es): 277/384 277/397, 277/401, 277/925
Other Classes:
US Patent Ref:

1826212	Oct, 1931	Gremminger	277/74.
2575549	Nov, 1951	Doble	277/93.
2706652	Apr, 1955	Berger	277/41.
2756080	Jul, 1956	Andresen et al.	277/4.

Other Refs:
Primary Examiner: Rothberg, Samuel B.
Assistant Examiner:
Attorney: Musial; N. T., Shook; G. E., Manning; J. R.