WO2011132337A1 - Dispositif d'étanchéité - Google Patents

Dispositif d'étanchéité Download PDF

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Publication number
WO2011132337A1
WO2011132337A1 PCT/JP2010/068657 JP2010068657W WO2011132337A1 WO 2011132337 A1 WO2011132337 A1 WO 2011132337A1 JP 2010068657 W JP2010068657 W JP 2010068657W WO 2011132337 A1 WO2011132337 A1 WO 2011132337A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal lip
oil
supply member
sealing device
oil supply
Prior art date
Application number
PCT/JP2010/068657
Other languages
English (en)
Japanese (ja)
Inventor
岳洋 中川
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
Priority claimed from JP2010099418A external-priority patent/JP2010270909A/ja
Application filed by Nok株式会社 filed Critical Nok株式会社
Publication of WO2011132337A1 publication Critical patent/WO2011132337A1/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
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/324—Arrangements for lubrication or cooling of the sealing itself

Definitions

  • the present invention relates to a sealing device for sealing a rotating part of an automobile or other equipment with a sealing lip.
  • this type of sealing device 100 includes, for example, as shown in FIG. 9, a reinforcing ring 101 having a substantially L-shaped cross section, and a synthetic resin having a rubber material or rubber-like elasticity at the outer peripheral cylindrical portion of the reinforcing ring 101.
  • the fixed seal portion 102 is press-fitted and fixed to the inner peripheral surface of the housing 200, and the seal lip 103 is slidably in close contact with the outer peripheral surface of the rotary shaft 300 inserted through the inner periphery of the housing 200. As a result, the interior space A is sealed.
  • the sealing device 100 shown in FIG. 10 covers the inner space A of the seal lip 103 on the inner periphery of the fixed seal portion 102 in order to form a sufficient lubricating oil film on the sliding portion of the seal lip 103.
  • An oil supply member 104 is attached. This oil supply member 104 receives and adheres to the surface a mist-like lubricating oil flying from the interior space A side, and among these, oil droplets O attached to the oil supply member 104 on the upper side of the seal lip 103 It is intended to ensure the lubricity of the sliding portion of the seal lip 103 by dropping from 104a to the portion of the outer peripheral surface of the rotating shaft 300 that is in the vicinity of the sliding portion of the seal lip 103 (Patent Document). 1). However, in the oil supply member 104 according to the prior art, the amount of lubricating oil supplied to the sliding portion of the seal lip 103 is not always sufficient, and further improvement has been desired.
  • the present invention has been made in view of the above points, and its technical problem is to further improve the lubricity of the sliding portion of the seal lip.
  • a sealing device for sealing a fluid at the outer periphery of a horizontal rotation shaft, and is inserted into the inner periphery of the housing.
  • a seal lip that is slidably in contact with the outer peripheral surface of the rotating shaft in a state of facing the internal space, and an oil supply member that extends to cover the internal space side of the seal lip. Is located on the upper side of the seal lip, and a required number of windows are opened, and on the inner diameter side, the tip facing the inner space side is close to the outer peripheral surface of the rotating shaft and toward the outer peripheral side of the seal lip.
  • a guide tube portion having a large diameter is formed.
  • a sealing device is the sealing device according to the first aspect, wherein a guide plate for guiding the drop of the oil droplet to the vicinity of the sliding portion of the seal lip is formed on the window portion.
  • the sealing device according to the first aspect, wherein an oil injection port for injecting oil toward the guide cylinder portion of the oil supply member is provided on the in-machine space side of the oil supply member.
  • the guide tube portion has an inclination to return oil from the oil injection port toward the window portion side of the oil supply member.
  • a part of the oil droplets flying from the in-machine space side slides on the seal lip through the window provided on the oil supply member located above the seal lip.
  • those that are located on the inner peripheral side of the guide cylindrical portion of the oil supply member can be shaken off by the centrifugal force and scattered, Since it is trapped in the large diameter side and falls to the vicinity of the sliding part of the seal lip, it is possible to improve the lubricity of the sliding part of the seal lip and maintain good sealing performance over a long period of time. it can.
  • the guide plate formed on the window portion receives the oil droplets flying to the window portion and falls to the vicinity of the sliding portion of the seal lip. Therefore, the lubricity of the sliding portion of the seal lip can be improved more reliably.
  • the oil injected from the oil injection port is kneaded toward the window part side of the oil supply member by the guide cylinder part of the oil supply member. Therefore, a part of the oil droplet is guided from the window part to the inner surface of the guide tube part and falls to the vicinity of the sliding part of the seal lip. Good sealing performance can be maintained over a wide range.
  • FIG.1 and FIG.2 shows the 1st form of the sealing device based on this invention.
  • reference numeral 1 is a housing of an apparatus
  • reference numeral 2 is a rotating shaft inserted through the inner periphery of the housing 1 whose axis is oriented sideways (substantially horizontal). That is, the rotating shaft 2 is rotated about a substantially horizontal axis, and the sealing device 10 according to the present invention is mounted on the inner peripheral surface 1 a of the housing 1.
  • the sealing device 10 includes a reinforcing ring 11, a fixed seal portion 12 formed integrally with the reinforcing ring 11 by a rubber material or a synthetic resin material having rubber-like elasticity, a seal The lip 13 and the dust lip 14, a garter spring 15 fitted to the outer peripheral surface near the tip of the seal lip 13, and an oil supply member 16 extending so as to cover the in-machine space A side of the seal lip 13 are provided.
  • the reinforcing ring 11 is manufactured by press molding of a metal plate or the like, and includes an outer diameter cylindrical portion 11a in which a fixed seal portion 12 is integrally vulcanized and bonded to an outer peripheral surface, and the outer diameter cylindrical portion.
  • 11a has a substantially L-shaped cross section composed of an inward flange 11b extending from the end opposite to the in-machine space A to the inner diameter side.
  • the fixed seal portion 12 is a portion that is press-fitted and tightly fitted to the inner peripheral surface 1 a of the housing 1, and is between the outer diameter cylindrical portion 11 a of the reinforcing ring 11 and the inner peripheral surface 1 a of the housing 1 in the mounted state. , And pre-compressed appropriately in the radial direction.
  • the seal lip 13 extends from the inner diameter portion of the inward flange 11b of the reinforcing ring 11 toward the in-machine space A side, and the inner diameter portion having a substantially V-shaped cross section in the vicinity of the tip thereof is appropriately tightened to the outer peripheral surface of the rotary shaft 2. It comes to be slidably in close contact with each other.
  • the dust lip 14 extends from the root of the seal lip 13 toward the side opposite to the in-machine space A, and the inner diameter end thereof is close to the outer peripheral surface of the rotating shaft 2 with a minute gap or is slightly tightened. It comes to be slidably in close contact with each other.
  • the garter spring 15 is formed by connecting both ends of a metal coil spring into an annular shape.
  • the garter spring 15 is fitted in an annular groove formed on the outer peripheral surface of the seal lip 13, and the seal lip 13 with respect to the outer peripheral surface of the rotary shaft 2.
  • the oil supply member 16 is manufactured by press molding of a metal plate or the like, and includes an attachment cylinder portion 16a press-fitted to the inner peripheral surface of the outer diameter cylinder portion 11a of the reinforcing ring 11, and an in-machine space A thereof.
  • the disk portion 16b extending from the end on the inner side toward the inner diameter side, and the inner diameter of the disk portion 16b located on the outer diameter side of the tip end portion of the seal lip 13 is inclined toward the front side of the seal lip 13 (the in-machine space A side).
  • An intermediate conical portion 16c extending further from the inner diameter toward the in-machine space A, and having a conical cylindrical shape with a gentler slope than the intermediate conical portion 16c and a larger diameter toward the outer peripheral side of the seal lip 13. It consists of a guide tube portion 16d.
  • a plurality of window portions 161 and 162 are opened at predetermined intervals in the circumferential direction.
  • the guide cylinder portion 16 d of the oil supply member 16 has a tip facing the in-machine space A side close to the outer peripheral surface of the rotary shaft 2.
  • the tip of the guide cylinder portion 16d of the oil supply member 16 faces the in-machine space A side so that the seal lip 13 faces the in-machine space A side.
  • the fixed seal portion 12 is press-fitted to the inner peripheral surface 1 a of the housing 1, and the inner diameter portion of the seal lip 13 is slidably brought into close contact with the outer peripheral surface of the rotary shaft 2.
  • mist-like lubricating oil present in A is prevented from leaking from the shaft periphery to the atmosphere side outside the machine B, and foreign matter is prevented from entering from outside the machine B.
  • the oil supply member 16 has an intermediate conical portion 16c and a guide tube portion 16d that protrude toward the in-machine space A side, so that the oil supply member 16 is a plane perpendicular to the axis, such as the oil supply member 104 of FIG. More lubricating oil can be collected as compared with the one that collects oil droplets.
  • the lubricity of the sliding portion S of the seal lip 13 can be improved and good sealing performance can be maintained over a long period of time.
  • the oil supply member 16 naturally drops oil droplets on the sliding portion S of the seal lip 13 from the upper side of the rotating shaft 2 (upper side of the seal lip 13). However, if it is opened only at a position above the rotary shaft 2 (seal lip 13) at a predetermined interval throughout the circumferential direction, when the sealing device 10 is mounted on the housing 1, It is not necessary to perform the alignment in the circumferential direction so that the windows 161 and 162 are located above the rotating shaft 2 (seal lip 13).
  • FIGS. 4 and 5 show a second embodiment of the sealing device according to the present invention.
  • the difference from the first embodiment described above is that the disk portion 16b of the oil supply member 16 has no window portion, and the window portion 163 opened in the intermediate cone portion 16c is It is not completely punched out, but is formed by punching out the tongue-shaped guide plate 164 through the U-shaped notch in the intermediate cone portion 16c.
  • the guide plate 164 forms a plane parallel to the disk portion 16b, in other words, a plane substantially orthogonal to the axis, and is located on the outer peripheral side of the tip of the seal lip 13, and the tip 164a faces the inner diameter side.
  • the window portion 163 is established by driving the guide plate 164 from the intermediate cone portion 16c so as to form a plane substantially orthogonal to the axis.
  • the sealing device 10 according to the second embodiment configured as described above is arranged so that the seal lip 13 faces the in-machine space A, in other words, the tip of the guide cylinder portion 16d in the oil supply member 16 is
  • the fixed seal portion 12 is press-fitted to the inner peripheral surface 1a of the housing 1 so as to face the in-machine space A, and the inner diameter portion of the seal lip 13 is slidably in close contact with the outer peripheral surface of the rotary shaft 2. This prevents, for example, mist-like lubricating oil present in the in-machine space A from leaking from the shaft periphery to the atmosphere side outside the machine B, and prevents foreign matter from entering from the outside B.
  • the oil supply member 16 has an intermediate conical portion 16c and a guide tube portion 16d that protrude toward the in-machine space A, so that the oil supply member 16 is orthogonal to the axis as in the oil supply member 104 of FIG. More lubricating oil can be collected as compared with the one that collects oil droplets on a flat surface.
  • FIG. 7 shows a third embodiment of the sealing device according to the present invention.
  • the sealing device 10 basically has a substantially cylindrical shape integrally formed with the reinforcing ring 11 with a rubber material or a synthetic resin material having rubber-like elasticity, as in the first or second embodiment.
  • the difference from the first or second embodiment described above is that the oil supply member 16 is press-fit into the inner peripheral surface of the outer diameter tube portion 11a of the reinforcing ring 11. 16a, a disk portion 16e extending from the end in the press-fitting direction to the inner diameter side, and a guide having a conical cylinder shape having a small diameter from the inner diameter end toward the front side (inside the machine space A) of the seal lip 13
  • the injection port 1c is located at the upper side of the rotary shaft 2 and is opened.
  • a plurality of window portions 165 are opened at predetermined intervals in the circumferential direction.
  • the inclination angle of the guide tube portion 16f is set so that the oil injected from the oil injection port 1c is turned back toward the window portion 165.
  • the fixed seal portion 12 is press-fitted to the inner peripheral surface of the seal mounting portion of the housing 1 so that the seal lip 13 faces the interior space A side.
  • the inner diameter portion of the seal lip 13 is slidably brought into close contact with the outer peripheral surface of the rotary shaft 2, for example, mist-like sealing target oil existing in the in-machine space A is discharged from the shaft periphery to the atmosphere B outside the machine.
  • the dust strip 14 prevents leakage of foreign matter from outside the machine B.
  • the lubricating oil O by striking the guide tube portion 16f of the oil supply member 16 located in front of the oil injection port 1c, partially O 11 is directed to the outer diameter side of the guide cylinder portion 16f (upper side) Te returned I behead obliquely, adhere to the inner surface of the window portion 165 which is opened in the disk portion 16e, is guided along the inner surface of the guide tube portion 16f as shown by reference numeral O 12 therefrom, the oil droplets O since 13 is in fall into the vicinity of the sliding portion S of the seal lip 13 is prompted formation of a good lubricating oil film on the sliding portion S.
  • the oil drop O 13 is dropped from the oil supply member 16 onto the sliding portion S of the seal lip 13 from the upper side of the rotary shaft 2, so that the window portion 165 basically has the rotary shaft 2 ( It is only necessary to be opened at a position above the seal lip 13). However, if the seal lip 10 is opened at predetermined intervals in the entire circumferential direction, the window portion 165 can be rotated when the sealing device 10 is attached to the housing 1. It is not necessary to perform circumferential alignment so as to be above 2 (seal lip 13).
  • the opening position of the window portion 165 does not necessarily need to be the disk portion 16e, and the position where the O 11 turned back by the guide tube portion 16f can be captured and is above the rotating shaft 2 (seal lip 13). If it is, it will not specifically limit.

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

Abstract

Selon l'invention, la lubrification d'une partie coulissante (S) située sur une lèvre de joint (13), est améliorée. Afin d'atteindre cet objectif, le dispositif d'étanchéité (10) de l'invention garde de manière étanche un fluide contenant une huile lubrifiante à la périphérie externe d'un axe de rotation (2) orienté transversalement. Ce dispositif d'étanchéité (10) est équipé : d'une lèvre de joint (13) en contact étroit avec la face périphérique externe de l'axe de rotation (2) traversé dans sa périphérie interne par un logement (1), de façon à pouvoir coulisser librement et dans un état dans lequel elle est orientée côté espace interne du moteur (A); et d'un élément d'alimentation en huile (16) qui se prolonge de manière à couvrir ce côté espace interne du moteur (A). Un nombre requis de parties fenêtre (161, 162) est installé sur cet élément d'alimentation en huile (16) de façon à être positionné côté supérieur de la lèvre de joint (13). Enfin, le dispositif d'étanchéité (10) est configuré de sorte que soit formée ,côté diamètre interne, une partie tube de guidage (16d), dont l'extrémité avant orientée côté espace interne du moteur (A) s'oriente côté périphérie externe de la lèvre de joint (13), et présente un diamètre élargi au fur et à mesure qu'elle s'approche de la face périphérique externe de l'axe de rotation (2).
PCT/JP2010/068657 2010-04-23 2010-10-22 Dispositif d'étanchéité WO2011132337A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010099418A JP2010270909A (ja) 2009-04-24 2010-04-23 密封装置
JP2010-099418 2010-04-23

Publications (1)

Publication Number Publication Date
WO2011132337A1 true WO2011132337A1 (fr) 2011-10-27

Family

ID=44834961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/068657 WO2011132337A1 (fr) 2010-04-23 2010-10-22 Dispositif d'étanchéité

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Country Link
WO (1) WO2011132337A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118977U (fr) * 1985-01-09 1986-07-26
JPH0384479U (fr) * 1989-12-20 1991-08-27
JP2000291808A (ja) * 1999-04-13 2000-10-20 Honda Motor Co Ltd オイルシールの潤滑装置
JP2008202614A (ja) * 2007-02-16 2008-09-04 Nok Corp 密封装置
JP2008309328A (ja) * 2007-05-11 2008-12-25 Nok Corp 密封装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118977U (fr) * 1985-01-09 1986-07-26
JPH0384479U (fr) * 1989-12-20 1991-08-27
JP2000291808A (ja) * 1999-04-13 2000-10-20 Honda Motor Co Ltd オイルシールの潤滑装置
JP2008202614A (ja) * 2007-02-16 2008-09-04 Nok Corp 密封装置
JP2008309328A (ja) * 2007-05-11 2008-12-25 Nok Corp 密封装置

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