WO2021014842A1 - Structure étanche - Google Patents

Structure étanche Download PDF

Info

Publication number
WO2021014842A1
WO2021014842A1 PCT/JP2020/023980 JP2020023980W WO2021014842A1 WO 2021014842 A1 WO2021014842 A1 WO 2021014842A1 JP 2020023980 W JP2020023980 W JP 2020023980W WO 2021014842 A1 WO2021014842 A1 WO 2021014842A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal lip
wall portion
end wall
seal
lip
Prior art date
Application number
PCT/JP2020/023980
Other languages
English (en)
Japanese (ja)
Inventor
直樹 萩原
琢也 天野
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 WO2021014842A1 publication Critical patent/WO2021014842A1/fr

Links

Images

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
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • 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
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering

Definitions

  • Patent Document 1 a gasket that maintains the sealing property by a pair of seal beads that are oriented in opposite directions in the axial direction regardless of the insertion direction into the mounting groove.
  • the gasket described in Patent Document 1 in which the sealing property is maintained by a pair of seal beads facing in opposite directions in the axial direction, the gasket may vary in the axial direction depending on the fixing method between the housings, the material, processing, deformation, etc. It may not be able to keep up sufficiently.
  • An object of the present invention is to provide a sealing structure that can follow the variation in the axial direction while maintaining the sealing property.
  • the sealed structure of the present invention It is a sealing device A first seal lip having a first seal lip tip and extending inward in the radial direction and in the first direction in the axial direction.
  • a second seal lip having a tip of the second seal lip and extending inward in the radial direction and extending in the second direction opposite to the first direction in the axial direction.
  • a holding ring that holds the first seal lip and the second seal lip,
  • a plurality of members that define a mounting space in which the sealing device is mounted.
  • a first member having a first end wall portion located in the first direction
  • a second member having an outer peripheral wall portion and a second end wall portion located in the second direction.
  • the first seal lip tip has a tightening margin with respect to the first end wall portion so as to press the holding ring against the second end wall portion by an axial reaction force.
  • the sealing structure of the present invention it is possible to follow the variation in the axial direction while maintaining the sealing property.
  • the plurality of members 11 and 12 have a first member 11 and a second member 12.
  • the first member 11 is a member that seals from the upper surface.
  • the first member 11 has an oil passage diameter R1.
  • the oil passage diameter R1 is the shortest distance from the central axis O to the first member 11 as shown in FIG.
  • the first member 11 has a first end wall portion 16.
  • the first end wall portion 16 has a planar shape orthogonal to the axis of the lip seal 21, and is provided on one side (upper in the figure) of the lip seal 21 in the axial direction.
  • the second member 12 is, for example, a housing or a case.
  • the second member 12 has an oil passage diameter R2.
  • the oil passage diameter R2 is the shortest distance from the central axis O to the second member 12, as shown in FIG.
  • the second member 12 has a second end wall portion 17 and an outer peripheral wall portion 18.
  • the second end wall portion 17 has a planar shape orthogonal to the axis of the lip seal 21, and is provided on the other side (lower in the figure) in the axial direction of the lip seal 21.
  • the outer peripheral wall portion 18 has a cylindrical surface shape.
  • the outer peripheral surface 21a of the lip seal 21 comes into contact with the outer peripheral wall portion 18.
  • the mounting space 14 is defined as an annular space surrounded by the first end wall portion 16, the second end wall portion 17, and the lip seal 21.
  • the lip seal 21 has a holding ring (lip holding ring, reinforcing ring) 22 and a rubber-like elastic body 23.
  • the holding ring 22 holds or reinforces the lip seal 21, and is made of a rigid material such as metal.
  • the holding ring 22 has an outer peripheral surface, an inner peripheral surface, a first end surface 22a located on one axial direction (upper side), and a second end surface 22b located on the other axial direction (lower side).
  • the rubber-like elastic body 23 may or may not be adhered to the second end face 22b, but it is preferable that the rubber-like elastic body 23 is not adhered to the second end face 22b. In this case, since the second end surface 22b directly contacts the second end wall portion 17 of the mounting space 14 to support the lip seal 21 during pressurization, the posture of the lip seal 21 is stable and the pressure resistance is increased. improves.
  • An annular seal lip (first seal lip) 27 is integrally formed on the rubber-like elastic body 23.
  • the seal lip 27 is located on the inner peripheral side of the lip seal 21 and from one end in the axial direction (upper in the figure) of the lip seal 21 toward inward in the radial direction and one in the axial direction (upper in the figure). It extends diagonally.
  • the seal lip tip (first seal lip tip) 27a comes into contact with the first end wall portion 16. That is, the axial tip portion 27b of the seal lip tip 27a comes into contact with the first end wall portion 16.
  • the seal lip tip 27a comes into contact with the first end wall portion 16 with a predetermined tightening allowance.
  • the axial reaction force generated thereby presses the holding ring 22 against the second end wall portion 17, thereby positioning the holding ring 22 in the axial direction.
  • An annular sub-seal lip (second seal lip) 28 is integrally formed on the rubber-like elastic body 23.
  • the secondary seal lip 28 is directed inward in the radial direction and from the other end in the axial direction (downward in the figure) of the lip seal 21 on the inner peripheral side of the lip seal 21 (downward in the figure). It extends diagonally.
  • the seal lip tip (second seal lip tip) 28a may be a seal portion having a protruding or bead shape.
  • an axial reaction force is generated when the sealing lip tip 27a comes into contact with the first end wall portion 16 with a predetermined tightening allowance. Since the axial reaction force presses the holding ring 22 against the second end wall portion 17, the lip seal 21 is fixed in the axial direction.
  • the outer peripheral surface 21a of the lip seal 21 of the present embodiment comes into contact with the outer peripheral wall portion 18. Therefore, the lip seal 21 can be positioned concentrically with respect to the central axis O of the mounting space 14.
  • the axial length of the lip seal 21 excluding the seal lip 27 is shorter than the distance between the first end wall portion 16 and the second end wall portion 17. Therefore, the lip seal 21 may be assembled in the mounting space 14 in a state where there is an axial variation in the mounting space 14.
  • the axial length of the lip seal 21 including the seal lip 27 of the present embodiment is longer than the distance between the first end wall portion 16 and the second end wall portion 17. Therefore, the lip seal 21 is pressed against the second end wall portion 17 by the axial reaction force. Therefore, it is possible to follow the variation in the axial direction.
  • FIG. 2 shows a cross-sectional view of a main part of a sealed structure in a sealed state according to the embodiment.
  • the lip seal 21 seals the mounting space 14.
  • the seal lip 27 is elastically deformed along the first end wall portion 16 on the first member 11 side.
  • the oil passage diameter R1 of the first member 11 is smaller than the oil passage diameter R2 of the second member 12. That is, there is a difference between the oil passage diameter R1 and the oil passage diameter R2.
  • FIG. 3 shows a cross-sectional view of a main part of a sealed structure in a sealed state in a modified example.
  • the sealed structure of the modified example has a different configuration of the first member 11 from the sealed structure of the embodiment. Other configurations are the same as in the embodiment.
  • the first member 11 of the modified example is a shaft with a flange.
  • the first member 11 has an inner peripheral wall portion connected to the first end wall portion 16.
  • the inner peripheral wall portion has a cylindrical surface shape.
  • FIG. 4 shows a cross-sectional view of a main part of a sealed structure in a sealed state in a comparative example.
  • the sealed structure of the comparative example has a different configuration of the first member 11 from the sealed structure of the embodiment. Other configurations are the same as in the embodiment.
  • the oil passage diameter R1 of the first member 11 of the comparative example is substantially the same as the oil passage diameter R2 of the second member 12. That is, there is no substantial difference between the oil passage diameter R1 and the oil passage diameter R2. In this case, when the seal lip 27 is elastically deformed along the side of the first member 11, the seal lip 21 may fall off from the mounting space 14.
  • the sealing structure described in the embodiment includes the first member 11 and the second member 12 having a difference between the oil passage diameter R1 and the oil passage diameter R2 as shown in FIG. 2, and the first member 11 as shown in FIG. Can be suitably applied when is a shaft with a flange.

Landscapes

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

Abstract

L'invention concerne une structure étanche qui peut se conformer aux variations dans la direction axiale lorsqu'un arbre doté d'une bride est inséré. La présente structure étanche comprend un dispositif d'étanchéité 21 comprenant une première lèvre d'étanchéité 27 qui comprend une première pointe de lèvre d'étanchéité 27a et qui s'étend vers l'intérieur dans une direction radiale et dans une première direction dans une direction axiale, une seconde lèvre d'étanchéité 28 qui comprend une seconde pointe de lèvre d'étanchéité 28a et qui s'étend vers l'intérieur dans la direction radiale et dans une seconde direction dans la direction axiale, et une bague de retenue 22 qui retient la première lèvre d'étanchéité 27 et la seconde lèvre d'étanchéité 28 ; une pluralité d'éléments comprenant un premier élément 11 qui comprend une première section de paroi d'extrémité 16 positionnée dans la première direction, une partie de paroi périphérique 18, et un second élément 12 qui comprend une seconde section de paroi d'extrémité 17 positionnée dans la seconde direction. La première lèvre d'étanchéité 27a comprend une tolérance de serrage par rapport à la première section de paroi d'extrémité 16 de telle sorte que la bague de retenue 22 est pressée contre la seconde section de paroi d'extrémité 17 par une force de réaction dans la direction axiale.
PCT/JP2020/023980 2019-07-25 2020-06-18 Structure étanche WO2021014842A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-136984 2019-07-25
JP2019136984 2019-07-25

Publications (1)

Publication Number Publication Date
WO2021014842A1 true WO2021014842A1 (fr) 2021-01-28

Family

ID=74193051

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2020/023980 WO2021014842A1 (fr) 2019-07-25 2020-06-18 Structure étanche

Country Status (1)

Country Link
WO (1) WO2021014842A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0640523U (ja) * 1992-10-30 1994-05-31 エヌオーケー株式会社 ガスケット
JPH07151233A (ja) * 1993-09-02 1995-06-13 Eaton Corp 保持型シーリング装置
JP2008256193A (ja) * 2007-03-09 2008-10-23 Uchiyama Mfg Corp 制振ワッシャ
JP6502318B2 (ja) * 2014-03-14 2019-04-17 Nok株式会社 ガスケット

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0640523U (ja) * 1992-10-30 1994-05-31 エヌオーケー株式会社 ガスケット
JPH07151233A (ja) * 1993-09-02 1995-06-13 Eaton Corp 保持型シーリング装置
JP2008256193A (ja) * 2007-03-09 2008-10-23 Uchiyama Mfg Corp 制振ワッシャ
JP6502318B2 (ja) * 2014-03-14 2019-04-17 Nok株式会社 ガスケット

Similar Documents

Publication Publication Date Title
EP3412941B1 (fr) Joint d'étanchéité
JP4875597B2 (ja) リップタイプシール
JP5692504B2 (ja) ガスケット
JP5216084B2 (ja) リップタイプシール
EP1959173B1 (fr) Dispositif d'etancheite
WO2017104278A1 (fr) Dispositif d'étanchéité
WO2007052685A1 (fr) Dispositif d’etancheite
US20160186864A1 (en) Sealing ring
JPWO2016031411A1 (ja) メカニカルシール
US11187326B2 (en) Mechanical seal
CN111133237B (zh) 密封结构
WO2021014842A1 (fr) Structure étanche
JP5016423B2 (ja) リップタイプシール
JP7301149B2 (ja) ガスケット
JP6625340B2 (ja) 密封装置
EP2815158B1 (fr) Joint d'étanchéité à anneau de glissement
JP2012154483A (ja) シールリング
CN220134610U (zh) 旋转密封件和密封结构
JP7170938B2 (ja) ガスケットの装着構造
EP1290365B1 (fr) Joint
EP4027041A1 (fr) Dispositif d'étanchéité
US20230387673A1 (en) Cable gland
JP2007182957A (ja) 密封装置
JPH0810713Y2 (ja) 密封装置
JP2000104831A (ja) 密封装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20843296

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20843296

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP