WO2006134756A1 - リップタイプシール - Google Patents
リップタイプシール Download PDFInfo
- Publication number
- WO2006134756A1 WO2006134756A1 PCT/JP2006/310295 JP2006310295W WO2006134756A1 WO 2006134756 A1 WO2006134756 A1 WO 2006134756A1 JP 2006310295 W JP2006310295 W JP 2006310295W WO 2006134756 A1 WO2006134756 A1 WO 2006134756A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lip
- type seal
- lip type
- sliding contact
- contact surface
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3244—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with hydrodynamic pumping action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3228—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip formed by deforming a flat ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
- F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
Definitions
- the present invention relates to a lip type seal made of a resin such as PTFE, which is used for an injection pump for a gasoline direct injection engine as a seal of a high pressure fuel pump, and used for other hydraulic, pneumatic and hydraulic devices in general. .
- a conventional lip type seal 101 has a substantially cylindrical recess 102 that opens to face the first sealed fluid side A, and is provided on the inner and outer periphery of the cylindrical recess 102.
- An inner peripheral lip 103 and an outer peripheral lip 104 which are in sliding contact with the shaft and the housing, and a substantially wedge-shaped recess 106 opened on the second sealing fluid side B facing the shaft.
- the plate-like lip 105 provided on the sealed fluid side B is integrally formed with grease, and this plate-like lip 105 is substantially wedge-shaped when the shaft 107 is inserted in the thick arrow X direction toward the inner periphery.
- the bending margin is secured by the reaction force that is bent largely in the direction of the arrow Y with the tip A of the shape recess 106 as a fulcrum and tries to recover the original shape.
- the lip type seal 101 is made of grease
- the plate-like lip 105 has a drawback in that the sealing property is reduced due to the lower tightening margin due to the poor creep characteristics caused by the grease. .
- the plate-like lip 105 is bent at the point A as a fulcrum and sealed with the reaction force. Therefore, there is a risk of stress concentration at the point A, and there is a risk of breakage.
- the tightening allowance was reduced.
- the adhesion performance to the shaft which is poor in elastic properties due to being a resin, is inferior and the sealing property is also inferior.
- Patent Document 1 Japanese Utility Model Publication No. 61-117962
- Patent Document 2 Japanese Patent Laid-Open No. 2000-320689
- the present invention aims to reduce the rigidity of a plate-like lip that is bent around a substantially wedge-shaped recess tip A with a lip type seal made of resin,
- the purpose is to reduce the stress concentration at point A, to improve the safety factor against fracture, to suppress the deterioration of the sealing performance due to the reduction of creep, and to improve the followability to shaft eccentricity.
- Another object of the present invention is to improve the sealing performance of a lip type seal made of resin.
- an object of the present invention is to control sliding resistance by controlling the lip rigidity in a lip type seal made of resin.
- a lip type seal is installed in an annular gap between an actuating member and a fixed member, and has a substantially cylindrical recess that opens toward the first sealing fluid side.
- An inner peripheral lip and an outer peripheral lip that are in sliding contact with the actuating member and the fixed member provided on the inner and outer periphery of the cylindrical recess, and the second sealing fluid side is positioned on the opposite side in the axial direction.
- the sealing fluid side has a substantially wedge-shaped concave portion extending in the radial direction facing the working member side and extending toward the second sealing fluid side provided on the second sealing fluid side of the wedge-shaped concave portion.
- a lip type seal having a plate-like lip that is in sliding contact with a resin body, a seal body 5 made of resin and formed in a body, and a spring 61 having a U-shaped cross section that is housed in the cylindrical recess 6.
- the sliding surface of the plate-like lip to the actuating member or Z and It is characterized in that the cut is formed on the sliding surface.
- the lip type seal has a small number of the slidable contact surface and the anti-slidable contact surface of the lip in which the cut is formed even if the inclined slidable contact surface of the inner peripheral lip is formed.
- the notch may be formed on one surface, and the ratio of the notch to the surface area of the surface may be 1Z2 or more.
- the cross-sectional shape of the cut is triangular or semi-circular but the cross-sectional shape of the cut is a triangle
- the side of the object to be sealed is the anti-sealable side of the inclination angle that the cut forms with the actuating member. It is larger than the object side, and an angle gradient is given.
- the first sealing fluid side may be a fuel side such as gasoline, and the second sealing fluid side may be an engine oil side.
- the present invention has the following effects.
- the lip type seal made of a resin such as PTFE according to the present invention having the above-described configuration has a notch formed on the sliding contact surface or Z and the anti-sliding contact surface of the plate-like lip. Even if it is molded with grease, the lip rigidity can be reduced, the stress concentration generated at the point A of the substantially wedge-shaped recess can be reduced, and the safety factor against breakage can be improved.
- the plate-like lip reduces creep by reducing the lip rigidity, can reduce a reduction in sealing performance due to a decrease in tightening allowance, and improve the followability to the eccentricity of the shaft. Can do.
- the lip rigidity can be controlled by changing the ratio of the portion where the cut is formed with respect to the surface area of the surface of the plate-like lip and the inner peripheral lip.
- the sliding resistance can be controlled.
- FIG. 1 is a cross-sectional view of a lip type seal according to Embodiment 1 of the present invention.
- FIG. 3 is a sectional view of a lip type seal according to Embodiment 2 of the present invention.
- FIG. 4 is a sectional view of a lip type seal according to Embodiment 3 of the present invention.
- FIG. 5 is a cross-sectional view of a lip type seal according to Embodiment 4 of the present invention.
- FIG. 6 is a cross-sectional view of the lip type seal according to the present invention attached to the shaft.
- FIG. 7 Cross-sectional view of a conventional lip type seal mounted on a shaft
- the lip type seal according to the embodiment of the present invention is installed in an annular space between the housing and the shaft.
- the lip type seal 1 As shown in FIG. 1, the lip type seal 1 according to Embodiment 1 of the present invention has a substantially cylindrical recess 6 that opens toward the first sealed fluid side A, and the inside and outside of the cylindrical recess 6 Opening facing the shaft side to the inner peripheral lip 2 and outer peripheral lip 3 slidably contacting the shaft and housing provided on the circumference, and the second sealing fluid side B located on the opposite side of the first sealing fluid side A in the axial direction A substantially wedge-shaped concave portion 8 extending in the radial direction, a plate-like lip 4 provided on the second sealing fluid side B of the wedge-shaped concave portion 8, and a seal body formed of PTFE, which is a resin body. 5 and cylindrical recess 6 It is equipped with a U-shaped spring 61 with a U-shaped cross section.
- the inner peripheral lip 2 is formed with a notch 7 having a substantially triangular cross section on the inclined sliding contact surface 21 on the right side in the figure, which is in sliding contact with the shaft, and is creeped by a spring 61 housed in the substantially cylindrical recess 6. Is to be suppressed.
- the ratio of the portion where the notch 7 is formed with respect to the surface area of the inclined sliding contact surface 21 is 1Z2 or more of the surface area of the inclined sliding contact surface 21, depending on the use conditions. It is advisable to select appropriately within this range.
- the plate-like lip 4 is provided on the second sealing fluid side B of the substantially wedge-shaped recess 8 extending in the radial direction and opening facing the shaft side formed on the second sealing fluid side B of the seal body 5.
- the slidable contact surface 41 on the left side of the figure has a substantially triangular cut 7.
- FIG. 2 shows an enlarged state of a portion C surrounded by a broken line in which the cut 7 is formed, and it is preferable that the shape of the tip 71 is as sharp as possible.
- the ratio of the portion where the notch 7 is formed with respect to the surface area of the sliding contact surface 41 is preferably 1Z2 or more of the surface area of the sliding contact surface 41, and in this range depending on the use conditions. It is good to select suitably.
- the shape of the tip 71 of the notch 7 formed on the inclined sliding contact surface 21 of the inner peripheral lip 2 is also preferably a sharp shape as described above.
- the cut 7 formed in the plate-like lip 4 may be formed not on the slidable contact surface 41 but on the anti-slidable contact surface 42 as in the second embodiment of the present invention shown in FIG. It may be formed on both side surfaces (41, 42) as in Embodiment 3 of the present invention shown in FIG.
- the ratio of the portion on which the notch 7 is formed is 1Z2 or more of the surface area of the anti-sliding contact surface 42, as with the sliding contact surface 41. It is preferable to select within this range depending on the use conditions.
- the shape of the tip 71 of the cut 7 is preferably a sharp shape as described above.
- the cross-sectional shape of the notch 7 may be a semicircular shape instead of a triangle as shown in FIG. 5 according to the fourth embodiment of the present invention, or may be other shapes. Even in this case, it is preferable that the shape of the distal end portion 71 is as sharp as possible.
- the cross-sectional shape of the notch 7 may be different on both side surfaces (41, 42).
- the notch 7 formed in both the inner peripheral lip 2 and the plate-like lip 4 is concentric.
- the shape of the notch 7 may be different between the two lips (2, 4).
- the inclination angle oc on the sealing object side after the insertion of the shaft 9 is larger than the inclination angle ⁇ on the anti-sealing object side. Is to be granted. That is, in the inner peripheral lip 2, as shown in FIG. 6 (2), which is an enlarged view of the D portion surrounded by the broken line portion, the first sealing fluid on the sealing target side with respect to the sealing target on the left side in the drawing.
- the inclination angle oc of the side ridge is greater than the inclination angle ⁇ of the second sealed fluid side B, and the plate-like lip 4 is an enlarged view of the ridge portion surrounded by the broken line portion in FIG.
- the inclination angle oc of the second sealing fluid side ⁇ which is the sealing object side, is larger than the inclination angle ⁇ of the first sealing fluid side ⁇ with respect to the sealing object on the right side of the figure. Has been.
- the inner peripheral lip 2 is pressed in the radial direction and tightened as shown in FIG. Secured force
- the notch 7 is formed, so that a multi-stage lip is obtained, the rigidity of the force is reduced, the adhesion to the shaft 9 is increased, and the sealing property can be improved.
- the plate-like lip 4 is bent starting from the saddle point of the substantially wedge-shaped recess, and the force is pressed in the radial direction by the reaction force to form a force notch 7 so that the rigidity is reduced.
- Stress concentration generated in part A is reduced; safety factor against
- the notch 7 is formed on the sliding contact surface 41, the sealing performance is improved because a multi-stage lip is formed.
- the ratio of the portion where the notch 7 is formed with respect to the surface area of the inner peripheral lip 2 and the plate-like lip 4 is preferably 1Z2 or more. , 4)
- the sliding resistance can be controlled by controlling the rigidity.
- the first sealing fluid side may be the fuel side such as gasoline
- the second sealing fluid side may be the engine oil side
- the first sealing fluid side is the engine oil side
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020087000945A KR101306828B1 (ko) | 2005-06-14 | 2006-05-24 | 립타입 시일 |
US11/922,076 US7942423B2 (en) | 2005-06-14 | 2006-05-24 | Lip type seal |
EP06746778.7A EP1892444B1 (en) | 2005-06-14 | 2006-05-24 | Lip type seal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-173283 | 2005-06-14 | ||
JP2005173283A JP4877460B2 (ja) | 2005-06-14 | 2005-06-14 | リップタイプシール |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006134756A1 true WO2006134756A1 (ja) | 2006-12-21 |
Family
ID=37532122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/310295 WO2006134756A1 (ja) | 2005-06-14 | 2006-05-24 | リップタイプシール |
Country Status (6)
Country | Link |
---|---|
US (1) | US7942423B2 (ja) |
EP (1) | EP1892444B1 (ja) |
JP (1) | JP4877460B2 (ja) |
KR (1) | KR101306828B1 (ja) |
CN (1) | CN101194119A (ja) |
WO (1) | WO2006134756A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7959159B2 (en) | 2006-11-23 | 2011-06-14 | Elringklinger Ag | Sealing arrangement |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007036625B4 (de) * | 2007-08-02 | 2013-10-17 | Ab Skf | Dichtelement |
KR200459738Y1 (ko) * | 2009-11-20 | 2012-04-13 | 한일전기엠엠씨 주식회사 | 브이 링 압착 방지구조 |
DE102011002491A1 (de) * | 2011-01-11 | 2012-07-12 | Aktiebolaget Skf | Radialwellendichtring |
US11235274B2 (en) | 2011-06-30 | 2022-02-01 | Donaldson Company, Inc. | Filter systems; components; features; and, methods of assembly and use |
DE102011080970B4 (de) * | 2011-08-15 | 2020-01-09 | Elringklinger Ag | Dichtung zum Abdichten eines Dichtspalts und Verfahren zum Herstellen einer solchen Dichtung |
DE102013207029B4 (de) * | 2013-04-18 | 2016-05-04 | Aktiebolaget Skf | Radialwellen-Dichtungsanordnung |
KR101395983B1 (ko) * | 2013-10-08 | 2014-05-16 | 조순식 | 오일 실 |
JP6314487B2 (ja) * | 2014-01-16 | 2018-04-25 | Nok株式会社 | 密封装置 |
DE102014205105A1 (de) * | 2014-03-19 | 2015-09-24 | Robert Bosch Gmbh | Pumpe, insbesondere Kraftstoffhochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
EP3434943A1 (en) * | 2016-03-22 | 2019-01-30 | NOK Corporation | Sealing device |
WO2017218966A1 (en) | 2016-06-17 | 2017-12-21 | Donaldson Company, Inc. | Air cleaner assemblies and cartridge |
CN109642675B (zh) * | 2016-08-24 | 2021-03-19 | Nok株式会社 | 密封装置 |
BR112019025694A2 (pt) | 2017-06-05 | 2020-09-01 | Donaldson Company, Inc. | montagens de purificador de ar e métodos de uso |
FR3071298B1 (fr) * | 2017-09-21 | 2020-07-03 | Euro Techniques Industries | Dispositif d'etancheite dynamique |
CN112483652B (zh) * | 2020-10-29 | 2023-01-31 | 一重集团(黑龙江)专项装备科技有限公司 | 一种楔形补偿型俯仰密封装置 |
Citations (9)
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JPS56117161U (ja) * | 1980-02-09 | 1981-09-08 | ||
EP0133928A1 (de) * | 1983-07-28 | 1985-03-13 | Elring Dichtungswerke GmbH | Radialwellendichtring |
DE3420523A1 (de) * | 1984-06-01 | 1985-12-05 | Elring Dichtungswerke Gmbh, 7012 Fellbach | Radialwellendichtring |
JPS61117962U (ja) | 1985-01-09 | 1986-07-25 | ||
JPH0882372A (ja) * | 1994-09-09 | 1996-03-26 | Mitsubishi Cable Ind Ltd | U形シール |
JP2000320689A (ja) | 1999-04-01 | 2000-11-24 | Carl Freudenberg:Fa | パッキング |
JP2002323137A (ja) * | 2001-04-10 | 2002-11-08 | Carl Freudenberg Kg | ラジアルシャフトシール |
JP2002349390A (ja) * | 2001-05-23 | 2002-12-04 | Nissan Motor Co Ltd | 内燃機関の高圧燃料ポンプのシール装置 |
JP2003247646A (ja) * | 2002-02-21 | 2003-09-05 | Mitsubishi Cable Ind Ltd | 樹脂製シール |
Family Cites Families (21)
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JPS56117161A (en) * | 1980-02-20 | 1981-09-14 | Oriental Yeast Co Ltd | Electrode coated with diaphragm |
US4578856A (en) * | 1984-04-11 | 1986-04-01 | Federal-Mogul Corporation | Method and mold for making a dual-lip shaft seal with one spring urged lip |
DE3418738C2 (de) * | 1984-05-19 | 1986-05-15 | Fa. Carl Freudenberg, 6940 Weinheim | Wellendichtung |
US4699526A (en) * | 1985-08-01 | 1987-10-13 | Nok Corporation | Sealing device for bearings |
DE3545683C1 (de) * | 1985-12-21 | 1987-07-16 | Freudenberg Carl Fa | Wellendichtung |
US4995623A (en) * | 1987-09-11 | 1991-02-26 | Nok Corporation | Sealing device for reciprocating member |
DE3741084C1 (de) * | 1987-12-04 | 1989-05-18 | Ford Werke Ag | Radialwellendichtring mit Staubschutzlippe |
JP3150861B2 (ja) * | 1994-12-15 | 2001-03-26 | エヌオーケー株式会社 | 往復動用密封装置 |
JP3261275B2 (ja) * | 1994-12-28 | 2002-02-25 | エヌオーケー株式会社 | 密封装置 |
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EP2290268B1 (en) * | 2001-06-04 | 2017-09-13 | NOK Corporation | Sealing device |
DE20121487U1 (de) * | 2001-11-08 | 2002-12-19 | Bruss Dichtungstechnik | Wellendichtring |
US6616146B2 (en) * | 2001-12-05 | 2003-09-09 | Caterpillar Inc | Radial seal arrangement |
US7100924B2 (en) * | 2004-01-15 | 2006-09-05 | Federal-Mogul Worldwide, Inc. | Elastomeric hinged seal |
JP2005299808A (ja) * | 2004-04-13 | 2005-10-27 | Nok Corp | ポンプ用シール |
US20090230630A1 (en) * | 2005-05-27 | 2009-09-17 | Nok Corporation | Lip type seal |
JP5045869B2 (ja) * | 2005-12-08 | 2012-10-10 | Nok株式会社 | リップタイプシール |
-
2005
- 2005-06-14 JP JP2005173283A patent/JP4877460B2/ja not_active Expired - Fee Related
-
2006
- 2006-05-24 EP EP06746778.7A patent/EP1892444B1/en not_active Expired - Fee Related
- 2006-05-24 KR KR1020087000945A patent/KR101306828B1/ko active IP Right Grant
- 2006-05-24 US US11/922,076 patent/US7942423B2/en not_active Expired - Fee Related
- 2006-05-24 CN CNA2006800209044A patent/CN101194119A/zh active Pending
- 2006-05-24 WO PCT/JP2006/310295 patent/WO2006134756A1/ja active Application Filing
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JPS56117161U (ja) * | 1980-02-09 | 1981-09-08 | ||
EP0133928A1 (de) * | 1983-07-28 | 1985-03-13 | Elring Dichtungswerke GmbH | Radialwellendichtring |
DE3420523A1 (de) * | 1984-06-01 | 1985-12-05 | Elring Dichtungswerke Gmbh, 7012 Fellbach | Radialwellendichtring |
JPS61117962U (ja) | 1985-01-09 | 1986-07-25 | ||
JPH0882372A (ja) * | 1994-09-09 | 1996-03-26 | Mitsubishi Cable Ind Ltd | U形シール |
JP2000320689A (ja) | 1999-04-01 | 2000-11-24 | Carl Freudenberg:Fa | パッキング |
JP2002323137A (ja) * | 2001-04-10 | 2002-11-08 | Carl Freudenberg Kg | ラジアルシャフトシール |
JP2002349390A (ja) * | 2001-05-23 | 2002-12-04 | Nissan Motor Co Ltd | 内燃機関の高圧燃料ポンプのシール装置 |
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Non-Patent Citations (1)
Title |
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See also references of EP1892444A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7959159B2 (en) | 2006-11-23 | 2011-06-14 | Elringklinger Ag | Sealing arrangement |
Also Published As
Publication number | Publication date |
---|---|
EP1892444A4 (en) | 2012-03-28 |
KR20080019706A (ko) | 2008-03-04 |
JP4877460B2 (ja) | 2012-02-15 |
CN101194119A (zh) | 2008-06-04 |
US20090302549A1 (en) | 2009-12-10 |
EP1892444B1 (en) | 2013-05-01 |
JP2006348995A (ja) | 2006-12-28 |
EP1892444A1 (en) | 2008-02-27 |
KR101306828B1 (ko) | 2013-09-10 |
US7942423B2 (en) | 2011-05-17 |
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