WO2014021179A1 - 密封装置 - Google Patents
密封装置 Download PDFInfo
- Publication number
- WO2014021179A1 WO2014021179A1 PCT/JP2013/070133 JP2013070133W WO2014021179A1 WO 2014021179 A1 WO2014021179 A1 WO 2014021179A1 JP 2013070133 W JP2013070133 W JP 2013070133W WO 2014021179 A1 WO2014021179 A1 WO 2014021179A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lip
- sealing device
- slinger
- contact
- face
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 67
- 239000000428 dust Substances 0.000 claims abstract description 38
- 239000010687 lubricating oil Substances 0.000 claims description 16
- 239000003921 oil Substances 0.000 description 29
- 230000002093 peripheral effect Effects 0.000 description 27
- 230000000694 effects Effects 0.000 description 16
- 229920001971 elastomer Polymers 0.000 description 16
- 238000005452 bending Methods 0.000 description 12
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 8
- 229910052731 fluorine Inorganic materials 0.000 description 8
- 239000011737 fluorine Substances 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 5
- 239000007769 metal material Substances 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 229920000800 acrylic rubber Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
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
- F16J15/002—Sealings comprising at least two sealings in succession
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- 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
- F16J15/3264—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 the elements being separable from each other
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- 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
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- 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
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth 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
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
- F16J15/4476—Labyrinth packings with radial path
Definitions
- the present invention relates to a sealing device according to a sealing technology.
- the sealing device of the present invention is used, for example, as a rotating oil seal in the field related to automobiles, or as a rotating oil seal in the field of general-purpose machines and the like. Further, the sealing device of the present invention is suitably used as an engine seal in which lubricating oil is present in the machine.
- the slinger 51 mounted on one member (for example, the shaft 71) of the two members rotating relative to each other and the lip member mounted on the other member (for example, the shaft housing, not shown) And the flange portion 53 extending in the radial direction are integrally provided on the former slinger 51, and the flange portion 53 slides on the latter lip member 61.
- Sealing devices end face lip type oil seals
- end faces 62 which are in close contact with one another.
- This type of sealing device is used in combination with the slinger 51 and the lip member 61 as described above, and the oil swinging-off by rotating the slinger 51 with one member and the pump by the screw groove (not shown)
- the oil on the inside of the machine A is sealed by the effect and by the fact that the end face lip 62 and the slinger 51 have an appropriate repulsive force (contact force).
- the pump effect of the slinger 51 is large, and a large amount of dust outside the machine (atmosphere side) B is sucked, which may cause damage to the end face lip 62 or the like to cause an oil leak.
- this type of sealing device may be used as a diesel or gasoline engine seal in which lubricating oil is present in the machine, in which case the end face lip needs to be appropriately lubricated by the lubricating oil in the machine (patented) Reference 3 or 4).
- a sealing device capable of improving its sealing performance, particularly against external dust, in a sealing device comprising a combination of a slinger and a lip member. Accordingly, it is an object of the present invention to provide a sealing device having a structure in which the end face lip is not easily damaged by external dust. In addition to this, when oil in the machine leaks the end face lip, the leaked oil can be stored in the vicinity of the end face lip, so that the sliding part of the end face lip can be lubricated by this oil. It aims at providing a sealing device.
- the sealing device according to claim 1 of the present invention has a slinger mounted on one of two members rotating in a relative manner and a lip member mounted on the other member.
- a sealing device integrally has a cylindrical portion fitted to the one member and a radially extending flange portion, and the lip member has an end face lip slidably in close contact with the flange portion.
- a bent portion protruding in the axial direction toward the lip member is provided in the flange portion, and a labyrinth structure having a minute gap is provided between the bent portion and the lip member.
- a sealing device is the sealing device according to the first aspect, wherein a lip end is disposed between the bent portion and the cylindrical portion, and the structure does not contact the slinger.
- a noncontact lip is provided on the lip member, and a labyrinth structure having a minute gap is provided between the noncontact lip and the slinger.
- a sealing device is the sealing device according to the second aspect, wherein a second non-contact lip having a structure in which a lip end is disposed toward the bent portion and does not contact the slinger.
- a space provided at the root of the end face lip and generating dust retention is provided between the noncontact lip and the second noncontact lip.
- the sealing device according to claim 4 of the present invention is characterized in that, in the sealing device according to claim 1, 2 or 3, the sealing device is used as a seal for an engine in which lubricating oil is present in the machine. Do.
- a labyrinth structure is provided between the bent portion and the lip member, with a bent portion projecting in the axial direction toward the lip member provided on the flange portion and with a minute gap. Because of the sealing effect exerted by the labyrinth structure, it is possible to prevent external dust from reaching the tip of the end face lip.
- the leaked oil is stored in the space between the end face lip and the bent portion. This is because oil is less likely to pass through the labyrinth structure because the labyrinth structure is provided between the bent portion and the lip member. Therefore, the sliding portion of the end face lip can be appropriately lubricated by the oil stored in the space between the end face lip and the bent portion.
- a labyrinth structure having a non-contact lip having a structure in which the lip end is disposed between the bent portion and the cylindrical portion and which does not contact the slinger is provided on the lip member and has a minute gap. Because it is provided between the non-contact lip and the slinger, the labyrinth structure can be provided over two places without increasing the sliding torque, thereby further improving the seal property against external dust. Is made possible.
- a second non-contact lip having a structure in which the lip end is disposed toward the bent portion and does not contact the slinger is provided at the root of the end face lip and a space is generated to cause dust retention. Since the part is provided between the non-contact lip and the second non-contact lip, dust can be retained in the space part, thereby further improving the sealing property against external dust.
- the present invention has the following effects.
- the external dust is prevented from reaching the tip of the end face lip by the sealing effect exerted by the labyrinth structure and the sealing effect by retaining the dust in the space. Is made possible. Accordingly, damage to the end face lip due to external dust is suppressed, and the sealability of the end face lip is maintained over a long period of time, so the oil leakage suppressing effect which is the original function of the end face lip is maintained over a long period of time It is possible to maintain.
- the present invention includes the following embodiments.
- the slinger is provided with a turn back and the labyrinth effect is provided between the lips to prevent dust from reaching the tip of the end face lip.
- the oil seal of the type shown in Fig. 3 is mainly used for diesel engines, and the material of the seal lip is silicone rubber, acrylic rubber, fluoro rubber (FKM) as high quality goods, etc. ing. Further, in recent years, with the aim of reducing the torque of the seal lip sliding portion, development studies have also been conducted to use this type of oil seal for a gasoline engine. Here, in the gasoline engine, heat resistance is required because of the high rotation speed used, and in silicone rubber and the like, there is a problem in durability, and fluorine rubber (FKM) comes to be exclusively used.
- FKM fluorine rubber
- fluororubber (FKM) is not well-matched to lubricating oil, and there is a concern that oil leaking from the end face lip (side lip) may immediately flow out to the radial lip (dust lip) side. Therefore, in the present invention, in the oil seal made of fluorine rubber (FKM) for a gasoline engine, the leaked oil is held in the vicinity of the end face lip (side lip).
- FIG. 1 shows a cross section of the main part of a sealing device according to a first embodiment of the present invention.
- the sealing device according to the embodiment is, for example, used as an engine seal in the field of automobile related fields, and suppresses the leakage of the oil of the inboard A to the outboard B while the external dust of the outboard B is in the inboard A Suppress intrusion into
- the sealing device according to the present embodiment is suitably used as a seal for a diesel or gasoline engine in which a lubricating oil is present in the interior A.
- the sealing device according to the embodiment is mounted on the slinger 11 mounted on one of the two members (for example, the shaft, not shown) and the other member (for example, the shaft housing, not shown). And a lip member 21 which is a combination of these.
- the slinger 11 is made of a metal material and integrally formed with a flange portion (outward flange portion) 13 radially outward at an end portion on one axial direction (a side A in the machine) of the cylindrical portion 12
- the inner peripheral surface of the cylindrical portion 12 is fitted to the outer peripheral surface of one of the members.
- the lip member 21 has a mounting ring 22 and a rubber-like elastic body 31 attached (bonded) to the mounting ring.
- the mounting ring 22 is made of a metal material, and the flange portion (inward flange portion) 24 is integrally formed radially inward at the other axial end (outside B side) end of the cylindrical portion 23.
- the outer peripheral surface of the cylindrical portion 23 is fitted to the inner peripheral surface of the other member.
- the flange portion 24 may be provided with a tapered surface 25 as illustrated.
- the rubber-like elastic body 31 is slidably supported by the attached rubber portion 32 attached (adhered) to the attachment ring 22 and the axial end face of the flange portion 13 of the slinger 11 supported by the attached rubber portion 32.
- An end face lip (side lip) 33 in close contact with a radial lip (dust lip) 34 which is similarly supported by the adherend rubber portion 32 and slidably in close contact with the outer peripheral surface of the cylindrical portion 12 of the slinger 11 is integrally provided. doing.
- the end face lip 33 mainly seals the oil in the in-machine A, and in order to exert this function, the lip end is directed radially outward on the in-machine A side.
- the radial lip 34 mainly seals external dust on the outside B, and in order to exert this function, the lip end is on the outside B side and is directed to the other axial direction.
- the sealing device according to the embodiment has the following configuration as a further feature.
- An annular bent portion 14 that protrudes toward the lip member 21, that is, protrudes in the other axial direction is provided on the flange portion 13 of the slinger 11 at an inner peripheral side of the end face lip 33.
- the minute gap is provided as an axial gap between the bent portion 14 and the attached rubber portion 32, and is provided as a radial gap between the root portion of the bent portion 14 and the end face lip 33 continuous with this.
- the bent portion 14 is formed to have a substantially U-shaped cross section as a whole, and is configured by a combination of an inner peripheral cylindrical portion 14a, a reverse portion 14b which is reversed over approximately 180 degrees, and an outer peripheral cylindrical portion 14c.
- the outer circumferential surface of the inner circumferential cylindrical portion 14a and the inner circumferential surface of the outer circumferential cylindrical portion 14c are in contact with each other.
- the inner peripheral surface of the inner peripheral cylindrical portion 14a and the outer peripheral surface of the outer peripheral cylindrical portion 14c are each formed in a cylindrical surface shape that is straight in the axial direction.
- a labyrinth structure 42 is provided which is provided by a rubber-like elastic body 31 and which has a minute gap between the non-contact lip 35 and the slinger 11.
- the minute gap is provided as a radial gap between the noncontact lip 35 and the cylindrical portion 12 and is also provided as a radial gap between the noncontact lip 35 and the continuous portion 14 which is continuous with this.
- the non-contact lip 35 is provided in one axial direction as a whole.
- the bent portion 14 protruding toward the lip member 21 is provided on the flange portion 13 of the slinger 11 and the labyrinth structure 41 having a minute gap is provided between the bent portion 14 and the lip member 21. Because the sealing effect exerted by the labyrinth structure 41 is provided, it is possible to suppress external dust from reaching the tip of the end face lip 33.
- a noncontact lip 35 having a structure in which the lip end 35a is disposed between the bent portion 14 and the cylindrical portion 12 in the slinger 11 and is not in contact with the slinger 11 is provided on the lip member 21 and a labyrinth structure provided with a minute gap. Since 42 is provided between the non-contact lip 35 and the slinger 11, the labyrinth structures 41 and 42 can be provided over two convenient places without increasing the sliding torque, and hence the outside It is possible to improve the sealing performance against dust.
- end face lip 33 is damaged by external dust, and since the sealability of end face lip 33 is maintained over a long period of time, oil leakage suppression which is the original function of end face lip 33 is suppressed. It is possible to maintain the effect over a long period of time.
- the material of the rubbery elastic body 31 including the end face lip 33, the noncontact lip 35 and the radial lip 34 silicone rubber, fluorine rubber (FKM), nitrile rubber, acrylic rubber, etc.
- fluorine rubber (FKM) is preferable from the viewpoint of high temperature durability.
- fluorine rubber (FKM) the affinity with the lubricating oil is low, so there is a concern that the lubricating oil exuded from the end face lip 33 may easily flow out to the radial lip 34 side.
- the lubricating oil that has leaked out is held in the space created by the end face lip 33 and the bending part 14 (the space from the lip end of the end face lip 33 to the bending part 14 or the labyrinth structure 41, 42). It is possible to suppress the occurrence of problems (torque increase, wear, etc.) on the sliding surface of the end face lip 33. Further, in order to further promote this operation and effect, a screw for a pump for returning the lubricating oil to the sliding surface from the sliding surface of the end face lip 33 or the flange portion 13 and from the sliding surface to the radial lip 34 side (inner peripheral side) Alternatively, a groove may be provided.
- FIG. 2 shows a cross section of the main part of a sealing device according to a second embodiment of the present invention.
- the sealing device according to the embodiment is used, for example, as an engine seal in the field of automobile related fields, and it is possible to suppress oil in the cabin A from leaking out of the cabin B and dust outside the cabin B invading the cabin A. Suppress.
- the sealing device according to the present embodiment is suitably used as a seal for a diesel or gasoline engine in which a lubricating oil is present in the interior A.
- the sealing device according to the embodiment is mounted on the slinger 11 mounted on one of the two members (for example, the shaft, not shown) and the other member (for example, the shaft housing, not shown). And a lip member 21 which is a combination of these.
- the slinger 11 is made of a metal material and integrally formed with a flange portion (outward flange portion) 13 radially outward at an end portion on one axial direction (a side A in the machine) of the cylindrical portion 12
- the inner peripheral surface of the cylindrical portion 12 is fitted to the outer peripheral surface of one of the members.
- the lip member 21 has a mounting ring 22 and a rubber-like elastic body 31 attached (bonded) to the mounting ring.
- the mounting ring 22 is made of a metal material, and the flange portion (inward flange portion) 24 is integrally formed radially inward at the other axial end (outside B side) end of the cylindrical portion 23.
- the outer peripheral surface of the cylindrical portion 23 is fitted to the inner peripheral surface of the other member.
- the flange portion 24 may be provided with a tapered surface 25 as illustrated.
- the rubber-like elastic body 31 is slidably supported by the attached rubber portion 32 attached (adhered) to the attachment ring 22 and the axial end face of the flange portion 13 of the slinger 11 supported by the attached rubber portion 32.
- An end face lip (side lip) 33 in close contact with a radial lip (dust lip) 34 which is similarly supported by the adherend rubber portion 32 and slidably in close contact with the outer peripheral surface of the cylindrical portion 12 of the slinger 11 is integrally provided. doing.
- the end face lip 33 mainly seals the oil in the in-machine A, and in order to exert this function, the lip end is directed radially outward on the in-machine A side.
- the radial lip 34 mainly seals external dust on the outside B, and in order to exert this function, the lip end is on the outside B side and is directed to the other axial direction.
- the sealing device according to the embodiment has the following configuration as a further feature.
- An annular bent portion 14 that protrudes toward the lip member 21, that is, protrudes in the other axial direction is provided on the flange portion 13 of the slinger 11 at an inner peripheral side of the end face lip 33.
- the minute gap is provided as an axial gap between the bending portion 14 and a second non-contact lip 36 described later.
- the bent portion 14 is formed to have a substantially V-shaped cross section as a whole, and is configured by a combination of an inner circumferential tapered portion 14 d, an inverted portion (top portion) 14 e, and an outer circumferential tapered portion 14 f.
- a labyrinth structure 42 is provided which is provided by a rubber-like elastic body 31 and which has a minute gap between the non-contact lip 35 and the slinger 11.
- the minute gap is provided as a radial gap between the noncontact lip 35 and the cylindrical portion 12 and is also provided as a radial gap between the noncontact lip 35 and the continuous portion 14 which is continuous with this.
- the non-contact lip 35 is provided in one axial direction as a whole.
- the second non-contact lip 36 having a structure in which the lip end 36 a is disposed toward the bent portion 14 and not in contact with the slinger 11 is located on the inner peripheral surface of the root portion of the end face lip 33.
- An annular space 37 is provided between the two lips 35 and 36 so as to generate dust retention between the second non-contact lip 36 and the non-contact lip 35.
- the bent portion 14 protruding toward the lip member 21 is provided on the flange portion 13 of the slinger 11 and the labyrinth structure 41 having a minute gap is provided between the bent portion 14 and the lip member 21. Because the sealing effect exerted by the labyrinth structure 41 is provided, it is possible to suppress external dust from reaching the tip of the end face lip 33.
- a noncontact lip 35 having a structure in which the lip end 35a is disposed between the bent portion 14 and the cylindrical portion 12 in the slinger 11 and is not in contact with the slinger 11 is provided on the lip member 21 and a labyrinth structure provided with a minute gap. Since 42 is provided between the non-contact lip 35 and the slinger 11, the labyrinth structures 41 and 42 can be provided over two convenient places without increasing the sliding torque, and hence the outside It is possible to improve the sealing performance against dust.
- a second non-contact lip 36 having a structure in which the lip end 36a is disposed toward the bent portion 14 and is not in contact with the slinger 11 is provided at the root of the end face lip 33 and the space portion 37 generates dust retention. Since it is provided between the non-contact lip 35 and the second non-contact lip 36, dust can be retained in the space 37, thereby further improving the sealing property against external dust There is.
- end face lip 33 is damaged by external dust, and since the sealability of end face lip 33 is maintained over a long period of time, oil leakage suppression which is the original function of end face lip 33 is suppressed. It is possible to maintain the effect over a long period of time.
- the dust entering the radial gap between the non-contact lip 35 and the bending portion 14 according to the above (B) does not change the intrusion direction. Since it is desirable to enter the space 37 as it is, the space 37 is preferably provided on the extension of the radial gap between the non-contact lip 35 and the fold 14 so that the second non-contact lip 36
- the inclination angle of the second non-contact lip 36 (the inclination angle with respect to the central axis of the sealing device) and the inclination angle (the same as above) of the inner circumferential tapered portion 14d are equal to or at least provided on the extension of the inner circumferential tapered portion 14d of the bent portion 14 It is preferable to match roughly.
- the material of the rubbery elastic body 31 including the end face lip 33, the noncontact lip 35 and the radial lip 34 is silicone rubber, fluorine rubber (FKM), nitrile rubber or acrylic rubber, and the sealing device is particularly preferable.
- fluorine rubber (FKM) When using as a seal for gasoline engines, it is preferable to use fluorine rubber (FKM) from the viewpoint of high temperature durability.
- fluorine rubber (FKM) the affinity with the lubricating oil is low, so there is a concern that the lubricating oil exuded from the end face lip 33 may easily flow out to the radial lip 34 side.
- the lubricating oil that has leaked out is held in the space created by the end face lip 33 and the bending part 14 (the space from the lip end of the end face lip 33 to the bending part 14 or the labyrinth structure 41, 42). It is possible to suppress the occurrence of problems (torque increase, wear, etc.) on the sliding surface of the end face lip 33. Further, in order to further promote this operation and effect, a screw for a pump for returning the lubricating oil to the sliding surface from the sliding surface of the end face lip 33 or the flange portion 13 and from the sliding surface to the radial lip 34 side (inner peripheral side) Alternatively, a groove may be provided.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
Abstract
Description
(1)スリンガーに折り返しを設け、ラビリンス効果をリップ間に持たすことで、ダストが端面リップ先端に到達することを防ぐ。
(2)また、軸側にも非接触のリップ(非接触リップ)を設けることで、トルクUPすることなく、ラビリンス構造を2箇所設けることができ、更にダスト性の向上が期待できる。
(3)スリンガーをある角度で曲げただけでも同様のラビリンス効果が期待でき、端面リップに非接触のリップ(第2非接触リップ)を追加し、スリンガーの曲げ角度とリップ(第2非接触リップ)の角度を合わせることで、侵入したダストをリップ(第2非接触リップ)と軸側リップ(非接触リップ)の間のポケット(空間部)で滞留させてやり、端面リップ先端へのダスト侵入を防止する。
(4)本発明により、端面リップの耐外部ダスト性の向上が期待でき、油漏れの改善、および車両寿命の向上が図れる。
図1は、本発明の第1実施例に係る密封装置の要部断面を示している。当該実施例に係る密封装置は例えば、自動車関連の分野においてエンジンシールとして用いられるものであって、機内Aの油が機外Bへ漏洩するのを抑制するとともに機外Bの外部ダストが機内Aへ侵入するのを抑制する。また、当該実施例に係る密封装置は、機内Aに潤滑油が存在するディーゼルまたはガソリンエンジン用シールとして好適に用いられる。
リップ部材21のほうへ向けてすなわち軸方向他方へ向けて突出する環状の折り曲げ部14が端面リップ33の内周側に位置してスリンガー11のフランジ部13に設けられており、この折り曲げ部14とリップ部材21との間に微小間隙を備えるラビリンス構造41が設けられている。微小間隙は、折り曲げ部14および被着ゴム部32間の軸方向間隙として設けられ、またこれと連続する折り曲げ部14および端面リップ33の根元部間の径方向間隙として設けられている。折り曲げ部14は、全体として断面略U字形に形成され、内周筒状部14a、略180度に亙って反転する反転部14bおよび外周筒状部14cの組み合わせによって構成されている。内周筒状部14aの外周面および外周筒状部14cの内周面は互いに接触している。内周筒状部14aの内周面および外周筒状部14cの外周面はそれぞれ軸方向ストレートな円筒面状に形成されている。
スリンガー11における折り曲げ部14と筒状部12との間にリップ端35aを配置するとともにスリンガー11に対し接触しない構造の非接触リップ35が折り曲げ部14の内周側に位置してリップ部材21のゴム状弾性体31によって設けられており、この非接触リップ35とスリンガー11との間に微小間隙を備えるラビリンス構造42が設けられている。微小間隙は、非接触リップ35および筒状部12間の径方向間隙として設けられ、またこれと連続する非接触リップ35および折り曲げ部14間の径方向間隙として設けられている。非接触リップ35は全体として軸方向一方へ向けて設けられている。
図2は、本発明の第2実施例に係る密封装置の要部断面を示している。当該実施例に係る密封装置は例えば、自動車関連の分野においてエンジンシールとして用いられ、機内Aの油が機外Bへ漏洩するのを抑制するとともに機外Bの外部ダストが機内Aへ侵入するのを抑制する。また、当該実施例に係る密封装置は、機内Aに潤滑油が存在するディーゼルまたはガソリンエンジン用シールとして好適に用いられる。
リップ部材21のほうへ向けてすなわち軸方向他方へ向けて突出する環状の折り曲げ部14が端面リップ33の内周側に位置してスリンガー11のフランジ部13に設けられており、この折り曲げ部14とリップ部材21との間に微小間隙を備えるラビリンス構造41が設けられている。微小間隙は、折り曲げ部14および後述する第2非接触リップ36間の軸方向間隙として設けられている。折り曲げ部14は、全体として断面略V字形に形成され、内周テーパー部14d、反転部(頂部)14eおよび外周テーパー部14fの組み合わせによって構成されている。
スリンガー11における折り曲げ部14と筒状部12との間にリップ端35aを配置するとともにスリンガー11に対し接触しない構造の非接触リップ35が折り曲げ部14の内周側に位置してリップ部材21のゴム状弾性体31によって設けられており、この非接触リップ35とスリンガー11との間に微小間隙を備えるラビリンス構造42が設けられている。微小間隙は、非接触リップ35および筒状部12間の径方向間隙として設けられ、またこれと連続する非接触リップ35および折り曲げ部14間の径方向間隙として設けられている。非接触リップ35は全体として軸方向一方へ向けて設けられている。
また、折り曲げ部14へ向けてリップ端36aを配置するとともにスリンガー11に対し接触しない構造の第2非接触リップ36が端面リップ33の根元部内周面に位置してリップ部材21のゴム状弾性体31によって設けられており、この第2非接触リップ36と非接触リップ35との間にダストの滞留を発生させる環状の空間部37が両リップ35,36間の谷間状のものとして設けられている。
12,23 筒状部
13,24 フランジ部
14 折り曲げ部
14a 内周筒状部
14b,14e 反転部
14c 外周筒状部
14d 内周テーパー部
14f 外周テーパー部
21 リップ部材
22 取付環
25 テーパー面
31 ゴム状弾性体
32 被着ゴム部
33 端面リップ
34 ラジアルリップ
35 非接触リップ
35a,36a リップ端
36 第2非接触リップ
37 空間部
41,42 ラビリンス構造
Claims (4)
- 相対回転する二部材のうちの一方の部材に装着されるスリンガーと他方の部材に装着されるリップ部材とを有し、前記スリンガーは、前記一方の部材に嵌合される筒状部と径方向に延びるフランジ部とを一体に有し、前記リップ部材は、前記フランジ部に摺動自在に密接する端面リップを有する密封装置において、
前記リップ部材のほうへ向けて軸方向に突出する折り曲げ部を前記フランジ部に設け、
微小間隙を備えるラビリンス構造を前記折り曲げ部と前記リップ部材との間に設けたことを特徴とする密封装置。 - 請求項1記載の密封装置において、
前記折り曲げ部と前記筒状部との間にリップ端を配置するとともに前記スリンガーに対し接触しない構造の非接触リップを前記リップ部材に設け、
微小間隙を備えるラビリンス構造を前記非接触リップと前記スリンガーとの間に設けたことを特徴とする密封装置。 - 請求項2記載の密封装置において、
前記折り曲げ部へ向けてリップ端を配置するとともに前記スリンガーに対し接触しない構造の第2非接触リップを前記端面リップの根元部に設け、
ダストの滞留を発生させる空間部を前記非接触リップと前記第2非接触リップとの間に設けたことを特徴とする密封装置。 - 請求項1、2または3記載の密封装置において、
当該密封装置は、機内に潤滑油が存在するエンジン用シールとして用いられることを特徴とする密封装置。
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CN201380039837.0A CN104508336B (zh) | 2012-07-30 | 2013-07-25 | 密封装置 |
US14/417,923 US9638324B2 (en) | 2012-07-30 | 2013-07-25 | Sealing device |
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