Low torque hydrodynamic lip geometry for rotary seals

Dietle, Lannie L.; Schroeder, John E.

Title: Low torque hydrodynamic lip geometry for rotary seals

Patent · Tue Jul 21 00:00:00 EDT 2015

OSTI ID:1195937

Dietle, Lannie L.; Schroeder, John E.

A hydrodynamically lubricating geometry for the generally circular dynamic sealing lip of rotary seals that are employed to partition a lubricant from an environment. The dynamic sealing lip is provided for establishing compressed sealing engagement with a relatively rotatable surface, and for wedging a film of lubricating fluid into the interface between the dynamic sealing lip and the relatively rotatable surface in response to relative rotation that may occur in the clockwise or the counter-clockwise direction. A wave form incorporating an elongated dimple provides the gradual convergence, efficient impingement angle, and gradual interfacial contact pressure rise that are conducive to efficient hydrodynamic wedging. Skewed elevated contact pressure zones produced by compression edge effects provide for controlled lubricant movement within the dynamic sealing interface between the seal and the relatively rotatable surface, producing enhanced lubrication and low running torque.

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Research Organization:: Kalsi Engineering Inc., Houston, TX (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FG02-05ER84206

Assignee:: Kalsi Engineering Inc. (Houston, TX)

Patent Number(s):: 9,086,151

Application Number:: 13/242,107

OSTI ID:: 1195937

Resource Relation:: Patent File Date: 2011 Sep 23

Country of Publication:: United States

Language:: English

References (75)

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Hydrodynamic rotary seal with opposed tapering seal lips Gobeli, Jeffrey D.; Dietle, Lannie; Kalsi, Manmohan S. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6767016 US Patent Document 6,767,016	patent	July 2004
Hydrodynamic rotary seal Gobeli, Jeffrey D.; Dietle, Lannie; Kalsi, Manmohan S. https://doi.org/https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/7052020 US Patent Document 7,052,020	patent	May 2006

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