WO2004036095A1 - 往復動シール - Google Patents
往復動シール Download PDFInfo
- Publication number
- WO2004036095A1 WO2004036095A1 PCT/JP2003/011995 JP0311995W WO2004036095A1 WO 2004036095 A1 WO2004036095 A1 WO 2004036095A1 JP 0311995 W JP0311995 W JP 0311995W WO 2004036095 A1 WO2004036095 A1 WO 2004036095A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lip
- seal
- shaft
- reciprocating
- frictional force
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
-
- 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
-
- 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
-
- 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
- F16J15/56—Other sealings for reciprocating rods
Definitions
- the present invention relates to a reciprocating seal used for, for example, a shock absorber.
- FIG. 3 is a schematic cross-sectional view of a reciprocating seal according to the related art.
- the reciprocating seal is disposed in an annular gap between a shaft (not shown) that moves relatively in the axial direction and an inner periphery of the housing (more specifically, a shaft hole provided in the housing).
- the reciprocating seal 100 generally includes a metal ring 200 and a rubber seal 30 baked on the metal ring 200.
- the rubber seal 300 has an outer peripheral seal portion 301 fitted on the inner periphery of the nozzle, a main seal lip 302 slidably contacting the outer peripheral surface of the shaft, and a sub-seal lip also slidably contacting the outer peripheral surface of the shaft.
- the main seal lip 30.2 is composed of the first lip 30a of the first stage and the second lip of the second stage. It has a two-stage rip structure consisting of a step 302b. In this way, by bringing the first lip 302a and the second lip 302b into sliding contact with the shaft surface, the posture of the main seal lip 302 is stabilized. ing. Thereby, the frictional force is made uniform, and the frictional force characteristics are improved.
- the structure for roughening the surface of the second lip may be a matte finish on the lip surface, a spiral screw projection, or a parallel projection perpendicular to the axis. (See the above-mentioned publication).
- the irregularities on the rip surface are random.
- the leakage amount of the sealing fluid (which is usually oil, and hence the sealing fluid will be described as oil hereinafter) is not uniform, and the leakage amount may be partially increased.
- the frictional force may be non-uniform. In other words, there is a problem that it is difficult to precisely control the amount of leakage and the distribution of frictional force in a structure in which satin finish is applied.
- An object of the present invention is to provide a reciprocating seal that improves sealing performance while improving frictional force characteristics.
- the present invention employs the following configurations.
- the seal lip has a two-stage lip structure, and a plurality of projections extending in the axial direction are provided on the surface of the second-stage lip.
- the seal lip since the seal lip has a two-stage lip structure, the posture of the seal lip is stabilized. Thereby, the distribution of the frictional force generated between the seal lip and the shaft is made uniform. Further, since a plurality of protrusions are provided on the surface of the second-stage lip, an increase in frictional force is suppressed. In addition, since the plurality of protrusions are configured to extend in the axial direction, if the protrusions discharge the sealing fluid, None to say. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a schematic sectional view of a reciprocating seal according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view schematically showing a projection provided on the reciprocating seal according to the embodiment of the present invention.
- FIG. 3 is a schematic cross-sectional view of a reciprocating seal according to the related art.
- FIG. 1 is a schematic sectional view of a reciprocating seal according to an embodiment of the present invention.
- the reciprocating seal 1 according to the embodiment of the present invention can be suitably used for a shock absorber mounted on an automobile or the like.
- the reciprocating seal 1 according to the embodiment of the present invention has an annular shape between a shaft (not shown) that relatively moves in the axial direction and an inner periphery of a housing (more specifically, a shaft hole provided in the housing). It is arranged in the gap to form a sealed space.
- oil which is a sealed fluid, is sealed in a sealed space formed by the reciprocating seal 1. This allows the axis and When the housing relatively reciprocates, the reciprocating seal 1 exhibits a cushioning function.
- the reciprocating seal 1 generally includes a metal ring 2 and a rubber seal 3 baked on the metal ring 2.
- the rubber seal 3 has an outer peripheral seal portion 31 fitted on the inner periphery of the housing (not shown) (the inner periphery of a shaft hole provided in the housing) and a main seal lip sliding on the outer peripheral surface of the shaft (not shown). 32 and a sub-seal lip 33 that slides on the outer peripheral surface of the shaft.
- a spring 4 for pressing the lip against the shaft surface is provided on the outer peripheral side of the main seal lip 32.
- the main seal lip 32 has a two-stage lip structure.
- the main seal lip 32 has a first lip 32 a located on the sealed fluid side and a second lip 32 a located on the non-sealed fluid side. b and.
- the two-stage lip structure is adopted, and the first lip 32a and the second lip 32b are brought into sliding contact with the shaft surface, so that the posture of the main seal lip 32 is achieved. Is stabilized. Thereby, the distribution of the frictional force is made uniform, and the frictional force characteristics are improved. That is, the micro vibration generated at the time of sliding contact between the main seal lip 32 and the shaft surface is reduced.
- a plurality of projections 34 extending in the axial direction are provided on the sliding surface of the second lip 32 b (the lip surface on the anti-sealing fluid side in the present embodiment). Is provided.
- the projections 34 are provided at equal intervals over the entire circumference.
- FIG. 2 is an image of a projection provided on the reciprocating seal according to the embodiment of the present invention.
- FIG. 2 is an image of a projection provided on the reciprocating seal according to the embodiment of the present invention.
- the cross-sectional shape of the projection is preferably triangular.
- the height h is preferably 2 to 500 m, and preferably 5 to 100 / X m in consideration of elastic contact.
- the distance w between the protrusions is 0.005 to 1.0 mm, and that the elastic contact is 0.01 to 0.2 mm.
- the apex angle of the projection be 60 to 120 °.
- the height H of the protrusion is 0.03 mm
- the interval w between the protrusions is 0.15 m
- m the vertex angle of the protrusion
- the length of the protrusion is 1.2. mm.
- the concave and convex shapes are not randomly formed as in the case of performing satin finish processing. That is, the shape and dimensions of the projections 34 can be precisely controlled. Therefore, the thickness of the oil film is made uniform, and variations in the leakage amount (leakage distribution) of the sealed fluid and variations in the frictional force distribution are suppressed.
- the plurality of projections 34 are configured to extend in the axial direction.
- the direction in which the protrusion 34 extends matches the relative movement direction of the shaft and the housing, and the movement (sliding contact) direction of the main seal lip 32 with respect to the shaft surface.
- the projection 34 does not discharge the sealing fluid (usually oil). This prevents the sealing fluid film (usually an oil film) from becoming too thick. This also suppresses leakage of the sealed fluid.
- the speed ratio leak test is a test for measuring the amount of leakage by inserting and removing the shaft so that the pushing speed and the pulling speed are different. That is, in the case of a reciprocating seal, a thin oil film is formed on the shaft surface when the shaft is pulled out. The thickness of this oil film tends to increase as the speed of movement of the shaft increases. Therefore, if the shaft is quickly pulled out and pushed in gently, the oil film becomes thicker in the pulling process (pulling process) and thinner in the pushing process. This makes it easier for oil to be extracted.
- the speed ratio leak test measures the amount of oil leaked out by repeatedly inserting and removing the shaft with a speed difference.
- the pulling speed in the pulling process was four times the pressing speed in the pressing process.
- the distribution of the frictional force on the shaft surface of the main seal lip 32 can be made uniform, and the increase in the frictional force can be suppressed. You can plan. As a result, it is possible to improve the frictional force characteristics, that is, to reduce the micro vibration generated when the main seal lip 32 and the shaft surface are in contact with each other.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003264524A AU2003264524A1 (en) | 2002-10-15 | 2003-09-19 | Reciprocating seal |
US10/531,443 US20060138729A1 (en) | 2002-10-15 | 2003-09-19 | Reciprocating seal |
EP03808888A EP1553335B1 (en) | 2002-10-15 | 2003-09-19 | Reciprocating seal |
US12/230,708 US7918463B2 (en) | 2002-10-15 | 2008-09-03 | Reciprocating seal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002300650A JP2004138091A (ja) | 2002-10-15 | 2002-10-15 | 往復動シール |
JP2002-300650 | 2002-10-15 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10531443 A-371-Of-International | 2003-09-19 | ||
US12/230,708 Continuation US7918463B2 (en) | 2002-10-15 | 2008-09-03 | Reciprocating seal |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004036095A1 true WO2004036095A1 (ja) | 2004-04-29 |
Family
ID=32104990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/011995 WO2004036095A1 (ja) | 2002-10-15 | 2003-09-19 | 往復動シール |
Country Status (7)
Country | Link |
---|---|
US (2) | US20060138729A1 (ja) |
EP (1) | EP1553335B1 (ja) |
JP (1) | JP2004138091A (ja) |
KR (1) | KR20050071545A (ja) |
CN (1) | CN100390445C (ja) |
AU (1) | AU2003264524A1 (ja) |
WO (1) | WO2004036095A1 (ja) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006242373A (ja) * | 2004-09-24 | 2006-09-14 | Nok Corp | 密封装置 |
JP2008101640A (ja) * | 2006-10-17 | 2008-05-01 | Nok Corp | 往復動軸用密封装置 |
US7887062B2 (en) * | 2007-04-18 | 2011-02-15 | Freudenberg-Nok General Partnership | Radial shaft seal with large radial offset accommodation |
US7963526B2 (en) * | 2007-05-15 | 2011-06-21 | Freudenberg-Nok General Partnership | Prelubricated multi-lipped radial shaft seal with large radial offset accommodation |
DE102007036625B4 (de) * | 2007-08-02 | 2013-10-17 | Ab Skf | Dichtelement |
JP2009058051A (ja) * | 2007-08-31 | 2009-03-19 | Nok Corp | 往復動軸用密封装置 |
JP2010038328A (ja) * | 2008-08-07 | 2010-02-18 | Nok Corp | 密封装置 |
WO2011111631A1 (ja) * | 2010-03-08 | 2011-09-15 | 本田技研工業株式会社 | 自動車用トランスミッションオイルシール |
US9322476B2 (en) * | 2010-03-08 | 2016-04-26 | Honda Motor Co., Ltd. | Vehicle engine oil seal |
US8931452B2 (en) * | 2010-03-08 | 2015-01-13 | Honda Motor Co., Ltd. | Vehicle valve stem seal |
CN101975278B (zh) * | 2010-11-04 | 2012-12-26 | 重庆大学 | 基于磁流变橡胶与磁流变脂的自愈合密封装置及往复机构 |
DE102011002491A1 (de) * | 2011-01-11 | 2012-07-12 | Aktiebolaget Skf | Radialwellendichtring |
EP2808585A4 (en) * | 2012-01-23 | 2015-10-07 | Daikin Ind Ltd | OIL SEAL FOR AUTOMOTIVE |
WO2013121812A1 (ja) * | 2012-02-15 | 2013-08-22 | イーグル工業株式会社 | 軸封装置 |
WO2013136958A1 (ja) * | 2012-03-13 | 2013-09-19 | ダイキン工業株式会社 | 自動車用フィラーキャップ |
DE102013207029B4 (de) * | 2013-04-18 | 2016-05-04 | Aktiebolaget Skf | Radialwellen-Dichtungsanordnung |
CN103742651B (zh) * | 2014-01-29 | 2016-11-16 | 烟台润蚨祥油封有限公司 | 一种低摩擦往复运动密封件 |
WO2014183542A1 (zh) * | 2013-05-16 | 2014-11-20 | 烟台润蚨祥油封有限公司 | 往复运动密封件 |
CN105020323A (zh) * | 2014-04-26 | 2015-11-04 | 烟台润蚨祥油封有限公司 | 一种防尘密封结构总成 |
CN105276066A (zh) * | 2014-06-24 | 2016-01-27 | 烟台润蚨祥油封有限公司 | 一种减震器密封系统 |
CN105782447B (zh) * | 2014-12-25 | 2019-06-14 | 斯凯孚公司 | 轴密封件 |
ES2841800T3 (es) | 2016-10-20 | 2021-07-09 | Henn Gmbh & Co Kg | Sello de acoplamiento de enchufe para un conducto de fluido de un motor de accionamiento |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63168365U (ja) | 1987-04-22 | 1988-11-02 | ||
JPH0235272A (ja) * | 1988-07-22 | 1990-02-05 | Sakagami Seisakusho:Kk | バックアップリング |
GB2256687A (en) | 1991-06-15 | 1992-12-16 | Gen Motors France | Master cylinder and end fitting therfor |
JPH0684067U (ja) * | 1993-05-19 | 1994-12-02 | 株式会社荒井製作所 | 往復動用オイルシール |
JP2001355740A (ja) * | 2000-06-15 | 2001-12-26 | Nok Corp | オイルシール |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1219272A (en) * | 1967-05-30 | 1971-01-13 | Dunlop Co Ltd | Improvements in sealing rings |
JPS63168365A (ja) | 1986-12-29 | 1988-07-12 | Nec Corp | プリンタに於ける文字パタ−ンアクセス方式 |
JPS6427410A (en) | 1988-04-04 | 1989-01-30 | Mitsubishi Agricult Mach | Reaper in harvester |
DE3830706A1 (de) * | 1988-09-09 | 1990-03-22 | Freudenberg Carl Fa | Wellendichtung |
JPH02121668A (ja) | 1988-11-01 | 1990-05-09 | Tokyo Electric Co Ltd | 浴中ポンプ |
JPH02136858A (ja) | 1988-11-18 | 1990-05-25 | Canon Inc | 感光性樹脂組成物 |
US4962359A (en) | 1989-06-29 | 1990-10-09 | Hewlett-Packard Company | Dual directional bridge and balun used as reflectometer test set |
JP3152466B2 (ja) | 1991-04-04 | 2001-04-03 | 三菱電機株式会社 | ソーティング装置およびソーティング方法 |
JPH0684067A (ja) * | 1992-09-04 | 1994-03-25 | Murata Mfg Co Ltd | カップベンダー吐出ノズル |
JP3261275B2 (ja) * | 1994-12-28 | 2002-02-25 | エヌオーケー株式会社 | 密封装置 |
US6029980A (en) * | 1997-09-18 | 2000-02-29 | Freudenberg-Nok General Partnership | Fluid side contamination exclusion sealing lip for radial shaft seals |
US6279914B1 (en) * | 1997-10-24 | 2001-08-28 | Eagle Industry Co., Ltd. | Sealing apparatus |
JP4244442B2 (ja) * | 1998-06-12 | 2009-03-25 | Nok株式会社 | 密封装置 |
US6729624B1 (en) * | 2001-02-20 | 2004-05-04 | Freudenberg-Nok General Partnership | Radial shaft seal |
-
2002
- 2002-10-15 JP JP2002300650A patent/JP2004138091A/ja active Pending
-
2003
- 2003-09-19 WO PCT/JP2003/011995 patent/WO2004036095A1/ja active Application Filing
- 2003-09-19 AU AU2003264524A patent/AU2003264524A1/en not_active Abandoned
- 2003-09-19 EP EP03808888A patent/EP1553335B1/en not_active Expired - Lifetime
- 2003-09-19 KR KR1020057005880A patent/KR20050071545A/ko not_active Application Discontinuation
- 2003-09-19 US US10/531,443 patent/US20060138729A1/en not_active Abandoned
- 2003-09-19 CN CNB038241412A patent/CN100390445C/zh not_active Expired - Lifetime
-
2008
- 2008-09-03 US US12/230,708 patent/US7918463B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63168365U (ja) | 1987-04-22 | 1988-11-02 | ||
JPH0235272A (ja) * | 1988-07-22 | 1990-02-05 | Sakagami Seisakusho:Kk | バックアップリング |
GB2256687A (en) | 1991-06-15 | 1992-12-16 | Gen Motors France | Master cylinder and end fitting therfor |
JPH0684067U (ja) * | 1993-05-19 | 1994-12-02 | 株式会社荒井製作所 | 往復動用オイルシール |
JP2001355740A (ja) * | 2000-06-15 | 2001-12-26 | Nok Corp | オイルシール |
Non-Patent Citations (1)
Title |
---|
See also references of EP1553335A4 |
Also Published As
Publication number | Publication date |
---|---|
JP2004138091A (ja) | 2004-05-13 |
KR20050071545A (ko) | 2005-07-07 |
EP1553335B1 (en) | 2012-02-08 |
CN100390445C (zh) | 2008-05-28 |
EP1553335A1 (en) | 2005-07-13 |
US20060138729A1 (en) | 2006-06-29 |
US7918463B2 (en) | 2011-04-05 |
US20090134586A1 (en) | 2009-05-28 |
AU2003264524A1 (en) | 2004-05-04 |
CN1688832A (zh) | 2005-10-26 |
EP1553335A4 (en) | 2010-07-14 |
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