WO2015004963A1 - 軸シール - Google Patents

軸シール Download PDF

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Publication number
WO2015004963A1
WO2015004963A1 PCT/JP2014/059760 JP2014059760W WO2015004963A1 WO 2015004963 A1 WO2015004963 A1 WO 2015004963A1 JP 2014059760 W JP2014059760 W JP 2014059760W WO 2015004963 A1 WO2015004963 A1 WO 2015004963A1
Authority
WO
WIPO (PCT)
Prior art keywords
outer peripheral
side wall
shaft seal
wall surface
corner
Prior art date
Application number
PCT/JP2014/059760
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
卯ノ田　和史
尚彦 本井伝
敦 細川
Original Assignee
三菱電線工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電線工業株式会社 filed Critical 三菱電線工業株式会社
Priority to CN201480011262.6A priority Critical patent/CN105008776B/zh
Priority to KR1020157020842A priority patent/KR20160030070A/ko
Publication of WO2015004963A1 publication Critical patent/WO2015004963A1/ja

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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
    • 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 shaft seal.
  • a shaft seal (as a single seal) that is used in a pneumatic device such as a cylinder or a valve and integrally includes a U-shaped seal portion 42 and a dust strip 47.
  • a shaft seal that is mounted in the annular groove 50 of the head or the valve body and slidably contacts the shaft member 41 (such as a rod or a spool) that reciprocates is known.
  • H 43 0 in FIG. 10
  • the conventional shaft seal 40 of Patent Document 1 or the like has a U-shaped seal portion 42 composed of an inner peripheral lip 43 and an outer peripheral lip 44 protruding in the direction of arrow R (hereinafter referred to as pressure receiving side R). And a sliding dust strip 47 projecting in the direction of the arrow L (hereinafter referred to as the low pressure side L), and a projecting portion 45 is formed on the outer surface of the outer peripheral lip 44.
  • the shaft seal 40 is mounted in an annular groove 50 of a female body B (such as a cylinder head) through which an insertion hole through which the shaft member 41 is reciprocally inserted is inserted. 41 is in sliding contact with the outer peripheral surface 41A.
  • the annular groove 50 has a first side wall surface 51 on the pressure receiving side R, a second side wall surface 52 on the low pressure side L, and a groove bottom surface 53.
  • the outer peripheral surface portion 49 of the shaft seal 40 contacts the groove bottom surface 53, and the support surface portion 46 formed on the low pressure side L of the shaft seal 40 is formed on the second side wall surface 52. Face to face.
  • the shaft seal 40 receives pressure from the U-shaped seal portion 42 and is pressed from the pressure receiving side R toward the low pressure side L.
  • the support surface portion 46 is pressed against the second side wall surface 52, and the dust lip 47 moves in volume inside the shaft seal 40 so as to enter the clearance between the female body B and the shaft member 41, and the corner portion P (
  • a rotational moment M is generated with the second side wall surface 52 side as a fulcrum.
  • the rotational moment M increases due to the dimensional difference H 43 and the short inner peripheral lip 43. Due to distortion (elastic deformation) due to the rotational moment M, the dust lip 47 may be lifted off the shaft member 41.
  • an object of the present invention is to provide a shaft seal capable of preventing the dust lip from being lifted under a pressure-receiving state (while preventing the above-described suction leakage).
  • the shaft seal according to the present invention is attached to the annular groove of the female body through which an insertion hole having an annular groove composed of a pressure-receiving side first side wall surface, a low-pressure side second side wall surface, and a groove bottom surface is provided.
  • a shaft seal that is in sliding contact with the outer peripheral surface of a shaft member that is reciprocally inserted into the insertion hole, the pressure receiving side U-shaped seal portion including an inner peripheral lip and an outer peripheral lip, and a dust lip that protrudes toward the low pressure side
  • a protruding portion is formed on the low pressure side outer peripheral corner formed by the outer peripheral surface portion contacting the groove bottom surface and the support surface portion facing the second side wall surface, and is in a pressure receiving state.
  • the protrusion is pressed against the groove bottom and the corner of the second side wall surface, and the protrusion is absorbed by the low-pressure side outer peripheral corner by elastic compression deformation. Further, in the pressure receiving state, with the corner portion of the second side wall surface and the insertion hole as a fulcrum, the dust lip rises due to the generated rotational moment to the radially inward direction generated by the elastic compression deformation of the protrusion. It is constructed so as to prevent it by the impact force.
  • the shaft seal of the present invention it is possible to prevent the dust lip from being lifted from the shaft member by the elastic reaction biasing force generated by the elastic compression deformation of the protrusion in the pressure receiving state.
  • the dust intrusion prevention performance also referred to as dust resistance
  • the grease retention can be improved.
  • FIG. 1 It is a figure which shows the cross-sectional shape and surface pressure distribution of a pressure-receiving state, Comprising: Graph (i) is a figure which shows the surface pressure distribution of a shaft member and a dust lip, Graph (ii) shows a support surface part and a 2nd side wall surface. It is a figure which shows surface pressure distribution, and graph (iii) is a figure which shows surface pressure distribution of an outer peripheral surface part and a groove bottom face. It is sectional drawing which showed another embodiment of this invention in the free state. It is sectional drawing which showed the Example of the protrusion part, (a) is sectional drawing of another Example, (b) is sectional drawing of another Example, (c) is another Example. FIG.
  • the shaft seal of the present invention is used in a reciprocating part such as a cylinder or a valve of a pneumatic device.
  • a reciprocating part such as a cylinder or a valve of a pneumatic device.
  • an insertion hole 20 having an annular groove 2 composed of a first side wall surface 13 on the pressure receiving side (high pressure side) R, a second side wall surface 12 on the low pressure side L, and a groove bottom surface 14.
  • the shaft seal is attached to the annular groove 2 of the penetrating female body B and slidably contacts the outer peripheral surface 1A of the shaft member 1 inserted in the insertion hole 20 so as to reciprocate.
  • the female body B is a cylinder head or a valve body
  • the shaft member 1 is a rod or a spool.
  • the clearance C 2 on the low pressure side L of the annular groove 2 is set larger than the clearance C 1 on the pressure receiving side R of the annular groove 2. This is because, on the low pressure side L of the annular groove 2, the dust lip 7 is inserted between the female body B and the outer peripheral surface 1 ⁇ / b> A of the shaft member 1 and is brought into sliding contact with the outer peripheral surface 1 ⁇ / b> A of the shaft member 1.
  • the shaft seal of the present invention can be used not only for pneumatic equipment but also for hydraulic equipment as long as it is for low pressure. A rubber-based material is used as the material of the shaft seal.
  • the shaft seal of the present invention includes a U-shaped seal portion 10 composed of an inner peripheral lip 3 and an outer peripheral lip 4 projecting to the pressure receiving side R, and a dust lip 7 projecting to the low pressure side L.
  • the U-shaped seal portion 10 receives pressure from the inner peripheral lip 3 and the outer peripheral lip 4 so that the inner peripheral lip 3 is in sliding contact with the outer peripheral surface 1 ⁇ / b> A of the shaft member 1. 4 (and the outer peripheral surface portion 15) are in close contact with the groove bottom surface 14.
  • a protruding portion 5 is provided on the outer surface of the outer peripheral lip 4 in a free state.
  • a concave inner peripheral abdomen 11 is formed on the inner peripheral surface between the inner peripheral lip 3 and the dust lip 7, and grease is sealed between the shaft member 1 by the inner peripheral lip 3, the dust lip 7 and the inner peripheral abdomen 11. Chamber 17 can be formed.
  • the shaft seal of the present invention has a low-pressure-side outer peripheral corner formed by an outer peripheral surface portion 15 that contacts the groove bottom surface 14 and a support surface portion 6 that faces the second side wall surface 12.
  • a protrusion 9 is formed.
  • the protrusion 9 is formed in an arc shape in cross section, and protrudes (bulges out) to the outer peripheral surface 15 side of the low pressure side outer peripheral corner 8.
  • the low pressure side outer peripheral corner 8 is pressed against the groove bottom surface 14 and the corner 16 of the second side wall surface 12, and the projection 9 is absorbed by the low pressure side outer peripheral corner 8 by elastic compression deformation. Is done.
  • the protrusion 9 is compressed (elastically deformed) between the low pressure side outer peripheral corner 8 and the corner 16 and the low pressure side outer peripheral corner 8 and the corner 16 are in close contact with each other.
  • the U-shaped seal portion 10 receives pressure and is pressed from the pressure receiving side R toward the low pressure side L, and the support surface portion 6 is pressed against the second side wall surface 12.
  • the entire shaft seal receives the rotational moment M. (As in the conventional seal shown in FIG. 9) by the occurrence of rotational moment M as described above, the dust lip 7 is going Ukiagaro as arrow M 7.
  • the protruding portion 9 of FIG. 1 is elastically compressed and deformed until it matches the shape of the groove bottom surface 14 of the annular groove 2, and the radial inward direction indicated by the arrow F in FIG. Generates a repulsive biasing force.
  • This elastic reaction urging force F preventing uplift M 7 dust lip 7 from the shaft member 1. That is, the elastic reaction force F not only counteract the arrow M 7 force to be Ukiagaro is dust lip 7, further pressed in the radial inward direction, indicated by the graph (i) in FIG. 2 surface Maintain contact with pressure.
  • a surface pressure peak occurs at the corner P between the second side wall surface 12 and the support surface portion 6.
  • a high surface pressure P 9 is generated in the vicinity of the corner portion 16 due to the repulsive force of the projection portion 9.
  • This high surface pressure P 9 is it that is causing the resilient anti-biasing force F described above.
  • the lift M 7 caused by the rotational moment M around the corner portion P in the pressure receiving state can be prevented by the elastic reaction biasing force F.
  • the shaft member 1 and the dust lip 7 are in sliding contact with an appropriate mountain-shaped surface pressure distribution as shown in the graph (i).
  • the height dimension H from the inner peripheral abdomen 11 to the tip of the protrusion 9 in the free state is set slightly smaller. It is constituted so that it may not fall off from the low pressure side L.
  • the protrusion 9 is absorbed by the low pressure side outer peripheral corner 8 by elastic compression deformation, so that the inner peripheral abdomen 11 is the shaft member even if the height dimension H is slightly different from the depth dimension D. 1 can be avoided, and sliding is possible with low friction.
  • the protrusion 9 formed on the low pressure side outer peripheral corner 8 protrudes (bulges out) toward the support surface 6 of the low pressure side outer peripheral corner 8. Since other configurations are the same as those of the above-described embodiment, description thereof is omitted.
  • the U-shaped seal portion 10 receives pressure, the projection 9 is pressed against the second side wall surface 12, and the projection 9 is elastically compressed and deformed to the low pressure side outer peripheral corner. 8 is absorbed (in cross-sectional shape).
  • the surface pressure increases in the vicinity of the corner 16 due to the repulsive force of the protrusion 9, and shows a peak Pmax.
  • the low pressure side outer peripheral corner portion 8 is pressed against the groove bottom surface 14 and the corner portion 16 of the second side wall surface 12, and the vicinity of the corner portion 16 as shown in the graph (iii) by volume movement due to elastic compression deformation of the protrusion portion 9.
  • low-pressure side circumference edge 8 is in contact strongly the groove bottom surface 14 at, shows a surface pressure P 9, by the elastic reaction force F in the radial in the direction indicated by an arrow, M 7 Ri floating dust lip 7 Is maintained and an appropriate surface pressure is maintained as shown in the graph (i).
  • the lift M 7 of the dust lip 7 from the shaft member 1 caused by the rotational moment M around the corner P in the pressure receiving state is prevented.
  • the shaft member 1 and the dust lip 7 are in sliding contact with an appropriate mountain-shaped surface pressure distribution as shown in the graph (i).
  • FIG. 6 shows another embodiment of the present invention. As shown in FIG. 6, it is also desirable to form oblique projections 9 projecting (expanding) on the outer peripheral surface portion 15 side and the support surface portion 6 side on the low pressure side outer peripheral corner portion 8. In the pressure receiving state, as in FIG. 2, the protrusion 9 is pressed against the groove bottom surface 14 and the corner 16 of the second side wall surface 12 and is absorbed by the low pressure side outer peripheral corner 8 by elastic compression deformation. Other configurations are the same as those of the above-described embodiment.
  • the protrusion 9 may have a quadrangular end surface. Or it is good also as trapezoid shape of FIG.7 (b), or it is also preferable to set it as the triangular shape of FIG.7 (c).
  • the protrusions 9 are continuously formed on the circumference.
  • the protrusions 9 are not limited to this embodiment, and are preferably formed intermittently (not shown).
  • the shaft seal according to the present invention is provided with the insertion hole 20 having the annular groove 2 including the first side wall surface 13 on the pressure receiving side R, the second side wall surface 12 on the low pressure side L, and the groove bottom surface 14.
  • a shaft seal provided with a U-shaped seal portion 10 on the pressure side R and a dust strip 7 projecting toward the low pressure side L, and an outer peripheral surface portion 15 that contacts the groove bottom surface 14 and a support that faces the second side wall surface 12.
  • the protrusion 9 is formed on the low-pressure side outer peripheral corner 8 formed by the surface 6 and is pressed against the groove bottom surface 14 and the corner 16 of the second side wall surface 12 in the pressure receiving state, so that the protrusion 9 is elastically deformed. So that the protrusion is absorbed in the low pressure side outer peripheral corner portion 8 in the pressure receiving state.
  • the elastic compressive deformation of 9 by generating elastic reaction force F in the radial inward direction, in a reaction force F, thereby preventing floating of the dust lip 7 from the shaft member 1.
  • the grease retention is improved and the sliding contact resistance can be reduced.
  • the eccentricity followability of the dust lip 7 can be maintained, and the dust resistance and grease retention can be improved. Furthermore, it is possible to prevent the dropout from the annular groove 2.
  • the lift M 7 of the dust lip 7 due to the generated rotational moment M is caused by the radial compressive deformation of the protrusion 9. Since it is configured to prevent it by the inward impact and repulsive force F, it achieves the desired purpose with a simple configuration, prevents dust lip lifting, has excellent eccentricity tracking, and retains grease. Also excellent in properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Devices (AREA)
PCT/JP2014/059760 2013-07-09 2014-04-02 軸シール WO2015004963A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480011262.6A CN105008776B (zh) 2013-07-09 2014-04-02 轴封
KR1020157020842A KR20160030070A (ko) 2013-07-09 2014-04-02 축 씨일

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013143184A JP6088374B2 (ja) 2013-07-09 2013-07-09 軸シール
JP2013-143184 2013-07-09

Publications (1)

Publication Number Publication Date
WO2015004963A1 true WO2015004963A1 (ja) 2015-01-15

Family

ID=52279660

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/059760 WO2015004963A1 (ja) 2013-07-09 2014-04-02 軸シール

Country Status (5)

Country Link
JP (1) JP6088374B2 (zh)
KR (1) KR20160030070A (zh)
CN (1) CN105008776B (zh)
TW (1) TWI522555B (zh)
WO (1) WO2015004963A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016200599B2 (en) * 2015-03-05 2017-06-22 Snap-On Incorporated Integrated seal for control button

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6664298B2 (ja) * 2016-09-09 2020-03-13 株式会社バルカー シール材
JP6576321B2 (ja) * 2016-10-26 2019-09-18 株式会社ニフコ ダンパー
DE102021212080B3 (de) 2021-10-26 2022-12-22 Trelleborg Sealing Solutions Germany Gmbh Dichtring mit druckaktivierbarer Zusatzdichtkante sowie Dichtungsanordnung
KR102581288B1 (ko) * 2021-11-16 2023-09-22 현대트랜시스 주식회사 자동변속기의 오일 씰

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6014356U (ja) * 1983-07-08 1985-01-31 株式会社　阪上製作所 パツキング
JPS61168354U (zh) * 1985-04-08 1986-10-18
US5205568A (en) * 1991-03-14 1993-04-27 Festo Kg Sealing ring

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040487B3 (de) * 2006-08-30 2007-11-08 Lucas Automotive Gmbh Dichtelement für einen Bremszylinder einer Fahrzeugbremsanlage
FR2916406B1 (fr) * 2007-05-22 2009-07-10 Bosch Gmbh Robert Maitre-cylindre comportant un joint et une gorge associee favorisant la realimentation.
JP5326265B2 (ja) * 2007-09-26 2013-10-30 Ｎｏｋ株式会社 密封装置
US20110091143A1 (en) * 2008-05-28 2011-04-21 The Timken Company Spherical bearing triple-lip seal
US20110309585A1 (en) * 2009-06-16 2011-12-22 Hidekazu Uehara Shaft seal device
JP5507273B2 (ja) * 2010-01-26 2014-05-28 Ｎｏｋ株式会社 密封装置およびこれを用いるポンプ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6014356U (ja) * 1983-07-08 1985-01-31 株式会社　阪上製作所 パツキング
JPS61168354U (zh) * 1985-04-08 1986-10-18
US5205568A (en) * 1991-03-14 1993-04-27 Festo Kg Sealing ring

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016200599B2 (en) * 2015-03-05 2017-06-22 Snap-On Incorporated Integrated seal for control button

Also Published As

Publication number Publication date
KR20160030070A (ko) 2016-03-16
CN105008776B (zh) 2017-05-17
JP6088374B2 (ja) 2017-03-01
JP2015017626A (ja) 2015-01-29
CN105008776A (zh) 2015-10-28
TW201502399A (zh) 2015-01-16
TWI522555B (zh) 2016-02-21

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