WO2010143694A1 - Dispositif d'étanchéité - Google Patents

Dispositif d'étanchéité Download PDF

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Publication number
WO2010143694A1
WO2010143694A1 PCT/JP2010/059869 JP2010059869W WO2010143694A1 WO 2010143694 A1 WO2010143694 A1 WO 2010143694A1 JP 2010059869 W JP2010059869 W JP 2010059869W WO 2010143694 A1 WO2010143694 A1 WO 2010143694A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing device
slinger
seal lip
outward flange
diameter side
Prior art date
Application number
PCT/JP2010/059869
Other languages
English (en)
Japanese (ja)
Inventor
佐藤彰洋
Original Assignee
Nok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 Nok株式会社 filed Critical Nok株式会社
Publication of WO2010143694A1 publication Critical patent/WO2010143694A1/fr

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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
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
    • 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
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • 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
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/3456—Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip

Definitions

  • FIG. 4 is a schematic cross-sectional view of a conventional sealing device.
  • FIG. 5 is a partially broken perspective view of a slinger in a sealing device according to a conventional example.
  • the seal member 520 includes a reinforcing ring 521 and a seal body 522 made of a rubber-like elastic body that is integrally formed with the reinforcing ring 521.
  • the seal body 522 includes an outer peripheral seal portion 522a that is in close contact with the inner peripheral surface of the shaft hole of the housing, and a seal lip 522b that is slidable with respect to the outward flange portion 512 of the slinger 510.
  • the seal member 520 also includes a felt dust 523 slidable on the cylindrical portion 511 a of the slinger 510.
  • the sealing device of the present invention is A sealing device that seals an annular gap between a shaft hole provided in a housing and a rotating shaft inserted through the shaft hole,
  • a slinger comprising an annular portion having a cylindrical portion fixed to the rotating shaft, and an outward flange portion extending in an outer radial direction from an end portion of the annular portion;
  • a seal member which is fixed to the shaft hole side of the housing and includes a seal lip which extends in an outer radial direction and is slidable with respect to an outward flange portion of the slinger;
  • a sealing device comprising: The surface of the outward flange portion on which the seal lip slides is closer to the inner diameter side and the outer diameter side than the sliding area of the seal lip toward the outer diameter side as the rotary shaft rotates. Screw projections for generating a fluid flow are provided, respectively.
  • the sealing performance can be improved.
  • FIG. 1 is a schematic cross-sectional view of a sealing device according to Embodiment 1 of the present invention.
  • FIG. 2 is a partially broken perspective view of the slinger in the sealing device according to the first embodiment of the present invention.
  • FIG. 3 is a partially broken perspective view of the slinger in the sealing device according to the second embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional view of a conventional sealing device.
  • FIG. 5 is a partially broken perspective view of a slinger in a sealing device according to a conventional example.
  • the sealing device 100 includes a slinger 110 fixed to the rotary shaft 200 and a seal member 120 fixed to the shaft hole side of the housing 300.
  • the slinger 110 includes an annular portion 111 having a cylindrical portion 111a fixed to the rotating shaft 200, and an outward flange portion 112 extending from the end on the oil side O of the annular portion 111 in the outer diameter direction. .
  • the seal member 120 includes a reinforcing ring 121 and a seal body 122 made of a rubber-like elastic body formed integrally with the reinforcing ring 121.
  • the reinforcing ring 121 includes an annular portion 121a having a cylindrical portion 121a1 that is fitted to the inner periphery of the shaft hole of the housing 300, and an inward support portion 121b that extends from the end on the atmosphere side A toward the inner diameter side of the annular portion 121a. And.
  • the seal body 122 includes an outer peripheral seal portion 122a that is in close contact with the inner peripheral surface of the shaft hole of the housing 300, and a seal lip 122b that is slidable with respect to the outward flange portion 112 of the slinger 110.
  • the seal lip 122b extends from the vicinity of the tip of the inward support portion 121b that supports most of the seal body 122 toward the outer diameter direction and the oil side O, and the vicinity of the tip contacts the outward flange portion 112. It is configured as follows.
  • a region indicated by X in FIG. 2 is a region where the seal lip 122 b slides in the outward flange portion 112.
  • the seal member 120 also includes a felt dust lip 123 slidable on the cylindrical portion 111 a of the slinger 110.
  • a plurality of screw projections 112a and 112b are provided on the inner diameter side and the outer diameter side from the sliding region X of the seal lip 122b. Is provided.
  • These screw protrusions 112a and 112b exhibit a function of generating a fluid flow toward the outer diameter side by rotating the slinger 110 as the rotating shaft 200 rotates. That is, in the present embodiment, the slinger 110 is configured to rotate together with the rotating shaft 200 in the direction of arrow R in FIG. Therefore, the screw protrusions 112a and 112b are configured to be inclined from the inner diameter side toward the outer diameter side toward the opposite side to the rotation direction.
  • the slinger 110 rotates together with the rotating shaft 200, a fluid flow is generated from the inner diameter side toward the outer diameter side along the screw protrusions 112a and 112b.
  • the direction in which the screw protrusions 112a and 112b are inclined may be set to the opposite side.
  • the positions where the screw projections 112a and 112b are arranged, the number of the screw projections 112a and 112b, and the height of the projections may be appropriately set according to the rotational speed of the rotating shaft 200, the viscosity of the oil, and the like.
  • the screw protrusions 112a and 112b are provided on the inner diameter side and the outer diameter side from the sliding region X of the seal lip 122b, respectively. Therefore, the screw protrusions 112a and 112b do not adversely affect the sealing performance in the sliding region X of the seal lip 122b. That is, when the rotary shaft 200 is stationary, the screw protrusions 112a and 112b do not cause oil leakage.
  • the sliding region X of the seal lip 122b in the outward flange portion 112 is configured by a plane, and the sliding portion of the seal lip 122b has an inner diameter side and an outer diameter side of the sliding region X. There is no gap that communicates. Therefore, even when the seal lip 122b is exposed to oil for a long time and the rotating shaft 200 is stationary and no fluid flow is generated by the screw protrusions 112a and 112b, the oil remains on the atmosphere side. It is possible to prevent leakage to A.
  • FIG. 3 shows a second embodiment of the present invention.
  • the case of the screw protrusion is shown as the one that generates the flow of the fluid toward the outer diameter side.
  • the case of the screw groove is used as the one that generates the flow of the fluid. Show. Since other configurations and operations are the same as those of the first embodiment, the description of the same components is omitted.
  • the slinger 150 also includes an annular portion 151 and an outward flange portion 152 as in the case of the first embodiment.
  • the surface side on which the seal lip 122b slides is more than the sliding region X of the seal lip 122b.
  • Screw grooves 152a and 152b are provided in the outward flange portion 152 of the slinger 150. These thread grooves 152a and 152b exhibit the function of generating a fluid flow toward the outer diameter side by rotating the slinger 150 as the rotating shaft 200 rotates. That is, in this embodiment, the slinger 150 is configured to rotate together with the rotary shaft 200 in the direction of arrow R in FIG.
  • the screw grooves 152a and 152b are configured to be inclined from the inner diameter side toward the outer diameter side toward the opposite side to the rotation direction. Thereby, when the slinger 150 rotates with the rotating shaft 200, a fluid flow is generated from the inner diameter side toward the outer diameter side along the thread grooves 152a and 152b.
  • the rotation direction of the rotating shaft 200 is opposite, the direction in which the screw grooves 152a and 152b are inclined may be opposite.
  • the position where the screw grooves 152a and 152b are arranged, the number of the arranged grooves, and the groove depth may be appropriately set according to the rotational speed of the rotating shaft 200, the viscosity of the oil, and the like.
  • Sealing device 110 Slinger 111 Annular part 111a Cylinder part 112 Flange part 112a, 112b Screw protrusion 120 Seal member 121 Reinforcement ring 121a Annular part 121a1 Cylindrical part 121b Support part 122 Seal body 122a Outer peripheral seal part 122b Seal lip 123 Dustrip 150 Slinger 151 Annular part 152 Flange part 152a, 152b Thread groove 200 Rotating shaft 300 Housing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

L'invention porte sur un dispositif d'étanchéité dans lequel une amélioration de performances d'étanchéité est obtenue. L'invention porte sur un dispositif d'étanchéité (100) qui assure l'étanchéité de l'espace annulaire entre un trou d'arbre disposé dans un boîtier (300) et un arbre rotatif (200) inséré à travers le trou d'arbre mentionné ci-dessus, et qui comporte une section annulaire (111) comprenant une section tubulaire (111a) fixée à l'arbre rotatif (200) ; une bague d'étanchéité (110) équipée d'une section de bride vers l'extérieur (112) s'étendant à partir de l'extrémité de la section annulaire (111) dans la direction du diamètre extérieur ; et un élément d'étanchéité (120) équipé d'une lèvre d'étanchéité (122b) qui est fixé à la partie de trou d'arbre du boîtier (300), qui s'étend dans la direction du diamètre extérieur, et qui est apte à coulisser librement par rapport à la section de bride vers l'extérieur (112). Le dispositif d'étanchéité (100) est caractérisé par un agencement dans lequel, sur la surface de la section de bride vers l'extérieur (112) sur laquelle la lèvre d'étanchéité (122b) coulisse, des saillies filetées sont disposées, lesquelles génèrent des écoulements de fluide vers une zone de diamètre extérieur en maintenant la rotation de l'arbre rotatif (200), les saillies filetées mentionnées ci-dessus étant disposées dans une zone de diamètre intérieur au-delà de la région dans laquelle la lèvre d'étanchéité (122b) coulisse et dans une zone de diamètre extérieur au-delà de la région mentionnée ci-dessus.
PCT/JP2010/059869 2009-06-10 2010-06-10 Dispositif d'étanchéité WO2010143694A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-138946 2009-06-10
JP2009138946A JP2010286023A (ja) 2009-06-10 2009-06-10 密封装置

Publications (1)

Publication Number Publication Date
WO2010143694A1 true WO2010143694A1 (fr) 2010-12-16

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PCT/JP2010/059869 WO2010143694A1 (fr) 2009-06-10 2010-06-10 Dispositif d'étanchéité

Country Status (2)

Country Link
JP (1) JP2010286023A (fr)
WO (1) WO2010143694A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3385579A4 (fr) * 2015-11-30 2018-11-14 NOK Corporation Dispositif de joint d'étanchéité
IT202000023131A1 (it) * 2020-10-01 2022-04-01 Skf Metal Stamping S R L Dispositivo di tenuta per unità cuscinetto
US11692591B2 (en) 2020-10-01 2023-07-04 Skf Metal Stamping S.R.L. Sealing device for a bearing unit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8403333B2 (en) * 2010-09-17 2013-03-26 Freudenberg-Nok General Partnership Zero torque membrane seal
JP6378548B2 (ja) * 2014-06-10 2018-08-22 Nok株式会社 密封装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63173568U (fr) * 1987-04-30 1988-11-10
JPH0755014A (ja) * 1993-08-12 1995-03-03 Koyo Seiko Co Ltd オイルシール
JP2004204935A (ja) * 2002-12-25 2004-07-22 Eagle Ind Co Ltd シール装置
JP2005240894A (ja) * 2004-02-26 2005-09-08 Nok Corp 密封装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63173568U (fr) * 1987-04-30 1988-11-10
JPH0755014A (ja) * 1993-08-12 1995-03-03 Koyo Seiko Co Ltd オイルシール
JP2004204935A (ja) * 2002-12-25 2004-07-22 Eagle Ind Co Ltd シール装置
JP2005240894A (ja) * 2004-02-26 2005-09-08 Nok Corp 密封装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3385579A4 (fr) * 2015-11-30 2018-11-14 NOK Corporation Dispositif de joint d'étanchéité
US10711899B2 (en) 2015-11-30 2020-07-14 Nok Corporation Seal device
IT202000023131A1 (it) * 2020-10-01 2022-04-01 Skf Metal Stamping S R L Dispositivo di tenuta per unità cuscinetto
US11692591B2 (en) 2020-10-01 2023-07-04 Skf Metal Stamping S.R.L. Sealing device for a bearing unit

Also Published As

Publication number Publication date
JP2010286023A (ja) 2010-12-24

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