CA2601282A1 - Hydrodynamic rotary seal with opposed tapering seal lips - Google Patents
Hydrodynamic rotary seal with opposed tapering seal lips Download PDFInfo
- Publication number
- CA2601282A1 CA2601282A1 CA002601282A CA2601282A CA2601282A1 CA 2601282 A1 CA2601282 A1 CA 2601282A1 CA 002601282 A CA002601282 A CA 002601282A CA 2601282 A CA2601282 A CA 2601282A CA 2601282 A1 CA2601282 A1 CA 2601282A1
- Authority
- CA
- Canada
- Prior art keywords
- annular
- fluid
- dynamic sealing
- relatively rotatable
- dynamic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
A hydrodynamically lubricating rotary seal for partitioning a lubricant from an environment has a generally circular seal body and sloping, generally opposed projecting static and dynamic lips. The dynamic sealing lip is provided for establishing compressed sealing relation with a relatively rotatable surface, and has a sloping dynamic sealing surface that varies in width, and also has a hydrodynamic inlet curvature that varies in position around the circumference of the seal. When the seal is installed against a relatively rotatable surface, the dynamic sealing lip deforms to define a variable width interfacial contact footprint against the relatively rotatable surface that is wavy on the lubricant side, and wedges a film of lubricating fluid into the interface in response to relative rotation.
The environment edge of the interfacial contact footprint is substantially circular, and therefore does not produce a hydrodynamic wedging action in response to relative rotation.
The environment edge of the interfacial contact footprint is substantially circular, and therefore does not produce a hydrodynamic wedging action in response to relative rotation.
Claims (3)
1. An annular hydrodynamic seal (103) for sealing between a first machine component (109) and a second machine component (118) having a relatively rotatable surface (115) and partitioning a lubricant chamber (122) of the first machine component (109) having a first fluid (121) from an environment having a second fluid (124), comprising:
A. an annular seal body (104) having a first seal end (133);
B. said annular seal body (104) defining an at least one resilient annular dynamic sealing lip (127) having an annular sloping dynamic sealing surface (140);
C. a dynamic exclusionary intersection (139) with said annular sloping dynamic sealing surface (140) for facing and preventing intrusion of the second fluid (124);
D. upon compression of said at least one resilient annular dynamic sealing lip (127) against the relatively rotatable surface (115) at least a portion of said annular sloping dynamic sealing surface (140) being deformed by and assuming the configuration of the relatively rotatable surface (115) and defining a dynamic sealing interface establishing an interfacial contact footprint having varying width (W) throughout the circumference thereof and having a first footprint edge (157) facing the lubricant chamber (122) and the first fluid (121) and a second footprint edge (160) facing the second fluid (124);
E. an annular static sealing surface (131) defining a static sealing interface with the first machine component (109);
F. at least one energizer feature (163) loading said annular sloping dynamic sealing surface (140) into compressed sealing relation with the relatively rotatable surface (115).
A. an annular seal body (104) having a first seal end (133);
B. said annular seal body (104) defining an at least one resilient annular dynamic sealing lip (127) having an annular sloping dynamic sealing surface (140);
C. a dynamic exclusionary intersection (139) with said annular sloping dynamic sealing surface (140) for facing and preventing intrusion of the second fluid (124);
D. upon compression of said at least one resilient annular dynamic sealing lip (127) against the relatively rotatable surface (115) at least a portion of said annular sloping dynamic sealing surface (140) being deformed by and assuming the configuration of the relatively rotatable surface (115) and defining a dynamic sealing interface establishing an interfacial contact footprint having varying width (W) throughout the circumference thereof and having a first footprint edge (157) facing the lubricant chamber (122) and the first fluid (121) and a second footprint edge (160) facing the second fluid (124);
E. an annular static sealing surface (131) defining a static sealing interface with the first machine component (109);
F. at least one energizer feature (163) loading said annular sloping dynamic sealing surface (140) into compressed sealing relation with the relatively rotatable surface (115).
2. An annular hydrodynamic sealing assembly comprising:
A. a first machine component (109) defining at least a portion of a lubricant chamber (122) containing a lubricating fluid (121);
B. a second machine component (118) having a relatively rotatable surface (115);
C. an annular hydrodynamic seal (103) partitioning said lubricating fluid (121) from a fluid environment (124), comprising:
i. at least one resilient annular dynamic sealing lip (127) having at least one annular sloping dynamic sealing surface (140) and having a generally circular dynamic exclusionary intersection (139) facing the fluid environment (124) for preventing intrusion of the fluid environment (124) into said lubricating fluid (121);
ii. an annular static sealing surface (131) defining a static sealing interface with the first machine component (109);
iii. at least one energizer feature (163);
D. said at least one energizer feature (163) compressing at least a portion of said at least one annular sloping dynamic sealing surface (140) into sealing relation with said relatively rotatable surface (115), said at least a portion of said at least one annular sloping dynamic sealing surface (140) being deformed by and assuming the configuration of said relatively rotatable surface (115) and defining a dynamic sealing interface establishing an interfacial contact footprint having varying width (W) throughout the circumference thereof, said interfacial contact footprint having a first footprint edge (157) facing the lubricant chamber (122) and the lubricating fluid (121) and having a second generally circular footprint edge (160) facing the fluid environment (124);
E. said at least one resilient annular dynamic sealing lip (127) defining a hydrodynamic wedging angle (158) with respect to said relatively rotatable surface (115) proximate said first footprint edge (157); and F. said at least one resilient annular dynamic sealing lip (127) hydrodynamically wedging a lubricating film of the lubricating fluid (121) into said dynamic sealing interface in response to relative rotational velocity, causing said lubricating film to migrate within said dynamic sealing interface toward said second generally circular footprint edge (160) and into the fluid environment (124).
A. a first machine component (109) defining at least a portion of a lubricant chamber (122) containing a lubricating fluid (121);
B. a second machine component (118) having a relatively rotatable surface (115);
C. an annular hydrodynamic seal (103) partitioning said lubricating fluid (121) from a fluid environment (124), comprising:
i. at least one resilient annular dynamic sealing lip (127) having at least one annular sloping dynamic sealing surface (140) and having a generally circular dynamic exclusionary intersection (139) facing the fluid environment (124) for preventing intrusion of the fluid environment (124) into said lubricating fluid (121);
ii. an annular static sealing surface (131) defining a static sealing interface with the first machine component (109);
iii. at least one energizer feature (163);
D. said at least one energizer feature (163) compressing at least a portion of said at least one annular sloping dynamic sealing surface (140) into sealing relation with said relatively rotatable surface (115), said at least a portion of said at least one annular sloping dynamic sealing surface (140) being deformed by and assuming the configuration of said relatively rotatable surface (115) and defining a dynamic sealing interface establishing an interfacial contact footprint having varying width (W) throughout the circumference thereof, said interfacial contact footprint having a first footprint edge (157) facing the lubricant chamber (122) and the lubricating fluid (121) and having a second generally circular footprint edge (160) facing the fluid environment (124);
E. said at least one resilient annular dynamic sealing lip (127) defining a hydrodynamic wedging angle (158) with respect to said relatively rotatable surface (115) proximate said first footprint edge (157); and F. said at least one resilient annular dynamic sealing lip (127) hydrodynamically wedging a lubricating film of the lubricating fluid (121) into said dynamic sealing interface in response to relative rotational velocity, causing said lubricating film to migrate within said dynamic sealing interface toward said second generally circular footprint edge (160) and into the fluid environment (124).
3. An annular hydrodynamic seal (103) for sealing between a first machine component (109) and a second machine component (118) having a relatively rotatable surface (115) and partitioning a lubricant chamber (122) of the first machine component (109) having a first fluid (121) from an environment having a second fluid (124), comprising:
A. an annular seal body (104) having a first seal end (133) and a second seal end (136);
B. at least one resilient annular dynamic sealing lip (127) having an at least one annular sloping dynamic sealing surface (140) and having at least one dynamic exclusionary intersection (139) for facing and preventing intrusion of the second fluid (124);
C. upon compression of said at least one resilient annular dynamic sealing lip (127) against the relatively rotatable surface (115) at least a portion of said at least one annular sloping dynamic sealing surface (140) being deformed by and assuming the configuration of the relatively rotatable surface (115) and defining a dynamic sealing interface establishing an interfacial contact footprint having varying width (W) throughout the circumference thereof and having a first footprint edge (157) facing the first fluid (121) within the lubricant chamber (122) and a second footprint edge (160) facing the second fluid (124);
D. an annular static sealing surface (131) defining a static sealing interface with the first machine component 109);
E. said second seal end (136) defining an annular recess (167) intermediate said at least one resilient annular dynamic sealing lip (127) and said annular static sealing surface (131); and F. said at least one resilient annular dynamic sealing lip (127) defining a hydrodynamic wedging angle (158) with respect to the relatively rotatable surface (115) for hydrodynamically wedging a lubricating film of the first fluid (121) into said dynamic sealing interface in response to relative rotational velocity, causing the lubricating film to migrate within said dynamic sealing interface toward the second footprint edge (160) and into the second fluid (124).
A. an annular seal body (104) having a first seal end (133) and a second seal end (136);
B. at least one resilient annular dynamic sealing lip (127) having an at least one annular sloping dynamic sealing surface (140) and having at least one dynamic exclusionary intersection (139) for facing and preventing intrusion of the second fluid (124);
C. upon compression of said at least one resilient annular dynamic sealing lip (127) against the relatively rotatable surface (115) at least a portion of said at least one annular sloping dynamic sealing surface (140) being deformed by and assuming the configuration of the relatively rotatable surface (115) and defining a dynamic sealing interface establishing an interfacial contact footprint having varying width (W) throughout the circumference thereof and having a first footprint edge (157) facing the first fluid (121) within the lubricant chamber (122) and a second footprint edge (160) facing the second fluid (124);
D. an annular static sealing surface (131) defining a static sealing interface with the first machine component 109);
E. said second seal end (136) defining an annular recess (167) intermediate said at least one resilient annular dynamic sealing lip (127) and said annular static sealing surface (131); and F. said at least one resilient annular dynamic sealing lip (127) defining a hydrodynamic wedging angle (158) with respect to the relatively rotatable surface (115) for hydrodynamically wedging a lubricating film of the first fluid (121) into said dynamic sealing interface in response to relative rotational velocity, causing the lubricating film to migrate within said dynamic sealing interface toward the second footprint edge (160) and into the second fluid (124).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/834,354 US6767016B2 (en) | 1998-05-20 | 2001-04-12 | Hydrodynamic rotary seal with opposed tapering seal lips |
| US09/834,354 | 2001-04-12 | ||
| CA002443731A CA2443731C (en) | 2001-04-12 | 2002-04-05 | Hydrodynamic rotary seal with opposed tapering seal lips |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002443731A Division CA2443731C (en) | 2001-04-12 | 2002-04-05 | Hydrodynamic rotary seal with opposed tapering seal lips |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2601282A1 true CA2601282A1 (en) | 2002-10-24 |
| CA2601282C CA2601282C (en) | 2010-02-09 |
Family
ID=38653262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2601282A Expired - Lifetime CA2601282C (en) | 2001-04-12 | 2002-04-05 | Hydrodynamic rotary seal with opposed tapering seal lips |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2601282C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9103445B2 (en) | 2009-04-08 | 2015-08-11 | Kalsi Engineering, Inc. | Rotary seal with truncated wave form |
| CN114008353A (en) * | 2019-06-26 | 2022-02-01 | 舍弗勒技术股份两合公司 | Press-fit interlocking connection and belt tensioner having such a connection |
-
2002
- 2002-04-05 CA CA2601282A patent/CA2601282C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9103445B2 (en) | 2009-04-08 | 2015-08-11 | Kalsi Engineering, Inc. | Rotary seal with truncated wave form |
| CN114008353A (en) * | 2019-06-26 | 2022-02-01 | 舍弗勒技术股份两合公司 | Press-fit interlocking connection and belt tensioner having such a connection |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2601282C (en) | 2010-02-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20220405 |