WO2012165083A1 - Seal ring - Google Patents

Seal ring Download PDF

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Publication number
WO2012165083A1
WO2012165083A1 PCT/JP2012/060815 JP2012060815W WO2012165083A1 WO 2012165083 A1 WO2012165083 A1 WO 2012165083A1 JP 2012060815 W JP2012060815 W JP 2012060815W WO 2012165083 A1 WO2012165083 A1 WO 2012165083A1
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WO
WIPO (PCT)
Prior art keywords
seal ring
annular groove
side wall
wall surface
slidably
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PCT/JP2012/060815
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French (fr)
Japanese (ja)
Inventor
関一成
渡邊英也
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Nok株式会社
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Publication of WO2012165083A1 publication Critical patent/WO2012165083A1/en

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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
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/12—Details
    • F16J9/22—Rings for preventing wear of grooves or like seatings

Definitions

  • the present invention relates to a seal ring.
  • a seal ring for sealing an annular gap between the two members is known.
  • the use environment becomes severe as the performance of the AT / CVT increases. That is, a seal ring is used in an environment of high pressure and high speed conditions. For this reason, engineer plastic with excellent heat resistance is adopted as a material, and heat generation due to sliding is suppressed by intentionally leaking a small amount of oil from a cut portion (joint portion) in the seal ring.
  • the material cost is increased, and in the latter case, the sealing function is lowered.
  • both side surfaces are constituted by step surfaces. Therefore, only the surface protruding in the axial direction on the outer diameter side is slidably in contact with the side wall surface of the annular groove 21.
  • heat generated by sliding friction is easily released, so that there is an advantage that the amount of generated heat can be suppressed.
  • the pressure per unit area increases and the surface pressure increases. Therefore, there is a disadvantage that the load (surface pressure) exceeds the allowable limit of the mechanical strength of the material, or the deterioration becomes severe due to accelerated wear.
  • the cross section is rectangular, and the entire portion of the side surface except for the minute gap portion between the rotating shaft 20 and the housing 30 is relative to the side wall surface of the annular groove 21. And slidably contact.
  • the surface pressure is lowered.
  • the amount of heat generation becomes high, and the mechanical strength is lowered from the thermal viewpoint.
  • An object of the present invention is to provide a seal ring that can suppress the amount of heat generation while reducing the surface pressure.
  • the present invention employs the following means in order to solve the above problems.
  • the seal ring of the present invention is It is attached to an annular groove provided in one of the two members that rotate relatively, and is slidably in close contact with the side wall surface of the annular groove and the peripheral surface of the other member,
  • the side surface facing the side wall surface of the annular groove is formed of a stepped surface that is recessed so that the groove bottom side of the annular groove is separated from the side wall surface, and a plurality of surfaces projecting toward the side wall surface on the recessed surface Are provided to be independent of each other, Of the side surfaces, the surface on the other member side is slidably in close contact with the side wall surface of the annular groove to form a seal surface, and the front end surfaces of the plurality of protrusions are on the side wall surface of the annular groove. It is configured so as to be slidably adhered.
  • the present invention not only the surface on the other member side among the side surfaces constituted by the step surfaces, but also the respective front end surfaces of the plurality of protrusions slidably contact the side wall surface of the annular groove. That is, in the seal ring whose side surface is formed of a stepped surface, not only the seal surface, but also the tip surfaces of the plurality of protrusions slidably contact the side wall surface of the annular groove. Accordingly, the surface pressure can be reduced. In addition, since the plurality of protrusions that contribute to the reduction of the surface pressure are provided so as to be independent from each other, heat can be efficiently released, and the amount of generated heat can be suppressed.
  • the seal ring can be prevented from being inclined with respect to the radial direction, and the attitude of the seal ring Can be stabilized. Thereby, it can suppress that sliding wear accelerates
  • FIG. 1 is a side view (one side view) of a seal ring according to Embodiment 1 of the present invention.
  • FIG. 2 is a view as seen from the outer peripheral surface side of the seal ring according to the first embodiment of the present invention.
  • FIG. 3 is a side view (side view of the other side) of the seal ring according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic cross-sectional view showing a mounting state of the seal ring according to the first embodiment of the present invention.
  • FIG. 5 is a partially broken perspective view of the seal ring according to the first embodiment of the present invention.
  • FIG. 6 is a partially broken perspective view of a seal ring according to Embodiment 2 of the present invention.
  • FIG. 1 is a side view (one side view) of a seal ring according to Embodiment 1 of the present invention.
  • FIG. 2 is a view as seen from the outer peripheral surface side of the seal ring according to the first embodiment of the present invention.
  • FIG. 7 is a partially broken perspective view of a seal ring according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic cross-sectional view showing a use state of the seal ring according to Conventional Example 1.
  • FIG. 9 is a schematic cross-sectional view showing a usage state of the seal ring according to Conventional Example 2.
  • Example 1 ⁇ Configuration of seal ring>
  • a seal ring according to Embodiment 1 of the present invention will be described with reference to FIGS.
  • the seal ring 10 according to the present embodiment is used to seal an annular gap between the rotating shaft 20 and the housing 30 that rotate relatively. Further, the seal ring 10 is mounted in an annular groove 21 provided on the rotary shaft 20. The seal ring 10 is slidably in close contact with the side wall surface of the annular groove 21 and the inner peripheral surface of a shaft hole provided in the housing 30 (a shaft hole through which the rotary shaft 20 is inserted). To seal the annular gap (see FIG. 4). In FIG. 4, the right side is the high pressure side (H) and the left side is the low pressure side (L).
  • a fluid to be sealed such as oil is sealed on the high pressure side (H), and the low pressure side (L) is the atmosphere side.
  • the seal ring 10 is slidably brought into contact with the side wall surface on the low pressure side (L) in the annular groove 21 by being pressed to the low pressure side (L) by the pressure from the high pressure side (H).
  • the seal ring 10 according to the present embodiment is made of a resin material (for example, PPS).
  • a cutting portion (abutting portion) 11 is provided at one place in the circumferential direction of the seal ring 10.
  • a special step cut structure that exhibits stable sealing performance even when the circumference of the seal ring 10 changes as the environmental temperature changes is adopted as the structure of the cutting portion 11.
  • the special step structure is a structure that is cut so as to have a step when viewed from both side surfaces and the outer peripheral surface side of the seal ring 10.
  • both side surfaces thereof are constituted by stepped surfaces that are recessed so that the groove bottom side of the annular groove 21 is separated from the side wall surface of the annular groove 21. That is, both side surfaces of the seal ring 10 are each formed of a stepped surface that is recessed on the inner peripheral surface side. However, no step is provided in the vicinity of the cutting portion 11 in order to exhibit stable sealing performance.
  • the seal ring 10 according to the present embodiment can be adapted from the viewpoint of wearability (being able to be worn without worrying about orientation) and when the high pressure side (H) and the low pressure side (L) are switched. Furthermore, it has a symmetrical shape with respect to the axial center plane. Therefore, both side surfaces of the seal ring 10 can be side surfaces that face the side wall surface (the low-pressure side (L) side wall surface) that is the sliding surface of the annular groove 21.
  • a plurality of projections 13 projecting toward the side wall surface of the annular groove 21 are provided on the recessed surface 12 so as to be independent from each other.
  • the plurality of protrusions 13 are arranged at equal intervals along the circumferential direction.
  • the front end surfaces of the plurality of protrusions 13 are configured so as to be located on the same plane as the protruding surface on the outer peripheral side among the side surfaces of the seal ring 10 (see FIG. 4).
  • each projection 13 is arranged so that the distance from the center of the circle of the seal ring 10 to each projection 13 is equal when viewed in plan.
  • the interval between the protrusions 13 is preferably as narrow as possible in order to make the distribution of the surface pressure as uniform as possible.
  • the seal ring 10 When the seal ring 10 configured as described above is attached to the annular groove 21 provided in the rotary shaft 20, as described above, the seal ring 10 includes the side wall surface of the annular groove 21 and the shaft hole provided in the housing 30. Are slidably in close contact with the inner peripheral surface.
  • the outer peripheral surface side of the seal ring 10 is slidably adhered to the inner peripheral surface of the shaft hole over the entire surface. That is, the entire outer peripheral surface of the seal ring 10 becomes a seal surface.
  • the side surface side of the seal ring 10 is slidably in close contact with the side wall surface of the annular groove 21 at a portion of the protruding surface on the housing 30 side (that is, the outer peripheral surface side). By doing so, a sealing surface is formed.
  • the tip surfaces of the plurality of protrusions 13 provided on the recessed surface 12 are also slidably adhered to the side wall surface of the annular groove 21.
  • each tip surface of the plurality of protrusions 13 is on the annular groove 21 side. Touch the wall surface slidably. That is, in the seal ring 10 whose side surfaces are stepped surfaces, not only the seal surface, but also the tip surfaces of the plurality of protrusions 13 are slidably in contact with the side wall surface of the annular groove 21. Therefore, the pressure per unit area can be reduced, and the surface pressure can be reduced.
  • the tip surfaces of the plurality of protrusions 13 provided on the recessed surface 12 are slidably in contact with the side wall surface of the annular groove 21, it is possible to suppress the seal ring 10 from being inclined with respect to the radial direction, The posture of the seal ring 10 can be stabilized. That is, for example, in the case of the seal ring 50 according to the conventional example shown in FIG. 8 described above, the recessed surface tends to tilt in the direction approaching the side wall surface of the annular groove 21 (that is, it tends to tilt in the clockwise direction in FIG. 8). ).
  • the tip surfaces of the plurality of protrusions 13 are slidably in contact with the side wall surface of the annular groove 21, so that such inclination can be suppressed. Thereby, it can suppress that a surface pressure becomes partially high, and can suppress that a part of sliding wear accelerates
  • the seal ring 10 As described above, according to the seal ring 10 according to this embodiment, it is possible to suppress the amount of generated heat while reducing the surface pressure. Therefore, even in a high pressure / high rotation environment, it is possible to stably exhibit the sealing performance over a long period of time. Further, it is not necessary to use expensive materials such as engineer plastics having excellent heat resistance. Furthermore, since it is not necessary to intentionally leak oil or the like from the cutting portion 11 more than necessary, the sealing performance can be improved.
  • FIG. 6 shows a second embodiment of the present invention.
  • the present embodiment a case where the arrangement of the protrusions is different from that in the first embodiment will be described. Since other configurations and operations are the same as those in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
  • each protrusion 13 is arranged so that the distance from the center of the circle of the seal ring 10 to each protrusion 13 is equal when viewed in plan. Yes.
  • the protrusions 13a arranged at equal intervals at the position biased toward the outer diameter side and the protrusions 13b arranged at equal intervals at the position biased toward the inner diameter side have a circumferential direction. It is arranged so that it may line up alternately toward. In plan view, the distance from the center of the circle of the seal ring 10 to each projection 13a is equal, and the distance from the center of the circle to each projection 13b is equal to each other. ing.
  • the protrusions 13 a and 13 b are provided on both side surfaces of the seal ring 10.
  • the sliding position with respect to the side wall surface of the annular groove 21 in the seal ring 10 can be more dispersed in the radial direction than in the first embodiment.
  • position of the seal ring 10 can be stabilized more and it can suppress further that sliding abrasion accelerates
  • FIG. 7 shows a third embodiment of the present invention.
  • a case where a plurality of grooves are provided in the stepped portion is shown. Since other configurations and operations are the same as those in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
  • both side surfaces are constituted by stepped surfaces, and a plurality of protrusions 13 are provided on the recessed surface 12 of both side surfaces.
  • a plurality of grooves 14 are provided in the step portion.
  • the positions where the grooves 14 are provided and the positions where the protrusions 13 are provided are the same in the circumferential direction. In other words, it is desirable to provide the groove 14 in a straight line passing through the protrusion 13 from the center position of the seal ring 10 when viewed in plan.
  • annular groove is provided on the shaft side, and the seal ring mounted in the annular groove is shown.
  • the present invention is mounted in the annular groove provided on the inner peripheral surface of the shaft hole of the housing.
  • the present invention is also applicable to a seal ring.
  • the side surface of the seal ring is formed of a stepped surface that is recessed on the outer peripheral surface side.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

A seal ring capable of inhibiting heat output while reducing contact pressure is provided. The sealing ring is characterized in being configured so that a side surface facing the sidewall surface of an annular groove (21) is composed of a stepped surface recessed so that the bottom of the annular groove (21) is set at a distance from the sidewall surface, a plurality of projections (13) protruding toward the sidewall surface are each independently disposed on the recessed surface (12), the surface on the housing (30) side of the side surface is in close slidable contact with the sidewall surface of the annular groove (21), whereby a seal surface is formed, and the distal end surfaces of the plurality of projectsion (13) are in close slidable contact with the sidewall surface of the annular groove (21).

Description

シールリングSeal ring
　本発明は、シールリングに関する。 The present invention relates to a seal ring.
　相対的に回転する２部材のうちの一方の部材に設けられた環状溝に装着され、該環状溝の側壁面と、他方の部材の周面に対してそれぞれ摺動自在に密着することによって、前記２部材間の環状隙間を封止するシールリングが知られている。自動車用のＡＴ・ＣＶＴに備えられるシールリングにおいては、ＡＴ・ＣＶＴの高性能化に伴って、使用環境が厳しくなっている。すなわち、高圧・高速条件の環境下でシールリングが用いられる。そのため、素材として耐熱性に優れたエンジニアプラスチックを採用したり、シールリングにおけるカット部（合口部）から微量の油を意図的にリークさせることで摺動による発熱を抑制したりしている。しかしながら、前者の場合には材料コストが増加してしまい、後者の場合にはシール機能が低下してしまう欠点がある。 It is attached to an annular groove provided in one of the two members that rotate relatively, and is slidably in close contact with the side wall surface of the annular groove and the peripheral surface of the other member, A seal ring for sealing an annular gap between the two members is known. In the seal ring provided in the AT / CVT for automobiles, the use environment becomes severe as the performance of the AT / CVT increases. That is, a seal ring is used in an environment of high pressure and high speed conditions. For this reason, engineer plastic with excellent heat resistance is adopted as a material, and heat generation due to sliding is suppressed by intentionally leaking a small amount of oil from a cut portion (joint portion) in the seal ring. However, in the former case, the material cost is increased, and in the latter case, the sealing function is lowered.
　ここで、代表的な従来例に係るシールリングについて、図面を参照して説明する。図８は従来例１に係るシールリングの使用状態を示す模式的断面図である。図示のシールリング５０は、回転軸２０に設けられた環状溝２１に装着され、環状溝２１の側壁面と、ハウジング３０の軸孔の内周面に対してそれぞれ摺動自在に密着する。これにより、相対的に回転する回転軸２０とハウジング３０との間の環状隙間を封止する。なお、図中右側が高圧側（Ｈ）であり、左側が低圧側（Ｌ）である。例えば、高圧側（Ｈ）には油などの密封対象流体が密封されており、低圧側（Ｌ）は大気側となる。 Here, a seal ring according to a typical conventional example will be described with reference to the drawings. FIG. 8 is a schematic cross-sectional view showing a use state of the seal ring according to Conventional Example 1. The illustrated seal ring 50 is mounted in an annular groove 21 provided on the rotary shaft 20, and is slidably in close contact with the side wall surface of the annular groove 21 and the inner peripheral surface of the shaft hole of the housing 30. Thereby, the annular clearance between the rotating shaft 20 and the housing 30 that rotate relatively is sealed. In the drawing, the right side is the high pressure side (H) and the left side is the low pressure side (L). For example, a fluid to be sealed such as oil is sealed on the high pressure side (H), and the low pressure side (L) is the atmosphere side.
　そして、このシールリング５０の場合には、両側面が段差面により構成されている。そのため、外径側における軸方向に突出した面のみが環状溝２１の側壁面に対して摺動自在に接触する。かかる構成を採用した場合には、摺動摩擦によって発生する熱を逃がし易いため、発熱量を抑制できる長所がある。しかしながら、単位面積当たりの圧力が高くなり、面圧が高くなる。そのため、荷重（面圧）が材料の持つ機械的強度の許容限界を超えてしまったり、摩耗の促進によって劣化が激しくなってしまったりする短所がある。 In the case of this seal ring 50, both side surfaces are constituted by step surfaces. Therefore, only the surface protruding in the axial direction on the outer diameter side is slidably in contact with the side wall surface of the annular groove 21. When such a configuration is adopted, heat generated by sliding friction is easily released, so that there is an advantage that the amount of generated heat can be suppressed. However, the pressure per unit area increases and the surface pressure increases. Therefore, there is a disadvantage that the load (surface pressure) exceeds the allowable limit of the mechanical strength of the material, or the deterioration becomes severe due to accelerated wear.
　図９は従来例２に係るシールリングの使用状態を示す模式的断面図である。図示のシールリング６０も従来例１と同様に、回転軸２０に設けられた環状溝２１に装着され、環状溝２１の側壁面と、ハウジング３０の軸孔の内周面に対してそれぞれ摺動自在に密着する。これにより、相対的に回転する回転軸２０とハウジング３０との間の環状隙間を封止する。 FIG. 9 is a schematic cross-sectional view showing a use state of the seal ring according to Conventional Example 2. The seal ring 60 shown in the figure is also mounted in the annular groove 21 provided in the rotary shaft 20 similarly to the conventional example 1, and slides with respect to the side wall surface of the annular groove 21 and the inner peripheral surface of the shaft hole of the housing 30. Adhere freely. Thereby, the annular clearance between the rotating shaft 20 and the housing 30 that rotate relatively is sealed.
　そして、このシールリング６０の場合には、断面が矩形であり、その側面のうち、回転軸２０とハウジング３０との間の微小な隙間部分を除く部分の全体が環状溝２１の側壁面に対して摺動自在に接触する。かかる構成を採用した場合には、面圧を低くする長所を有する。しかしながら、摺動摩擦によって発生する熱を逃がし難いため、発熱量が高くなってしまい、熱的観点から機械的強度を低下させてしまう短所がある。 In the case of this seal ring 60, the cross section is rectangular, and the entire portion of the side surface except for the minute gap portion between the rotating shaft 20 and the housing 30 is relative to the side wall surface of the annular groove 21. And slidably contact. When such a configuration is adopted, there is an advantage that the surface pressure is lowered. However, since it is difficult to release the heat generated by the sliding friction, the amount of heat generation becomes high, and the mechanical strength is lowered from the thermal viewpoint.
　なお、関連する技術としては、特許文献１～３に開示された技術がある。 As related technologies, there are technologies disclosed in Patent Documents 1 to 3.
特開２００８－２７５０５２号公報JP 2008-275052 A 特開２００６－２９３４９号公報JP 2006-29349 A 実開平６－４５１７２号公報Japanese Utility Model Publication No. 6-45172
　本発明の目的は、面圧の低下を図りつつ、発熱量の抑制を図ることのできるシールリングを提供することにある。 An object of the present invention is to provide a seal ring that can suppress the amount of heat generation while reducing the surface pressure.
　本発明は、上記課題を解決するために以下の手段を採用した。 The present invention employs the following means in order to solve the above problems.
　すなわち、本発明のシールリングは、
　相対的に回転する２部材のうちの一方の部材に設けられた環状溝に装着され、該環状溝の側壁面と、他方の部材の周面に対してそれぞれ摺動自在に密着することによって、前記２部材間の環状隙間を封止するシールリングにおいて、
　前記環状溝の側壁面に対向する側面が、前記環状溝の溝底側の方が前記側壁面から離れるように凹む段差面で構成され、かつ凹んだ面に前記側壁面に向かって突出する複数の突起がそれぞれ独立するように設けられ、
　前記側面のうち前記他方の部材側の面が前記環状溝の側壁面に摺動自在に密着することでシール面が形成され、かつ前記複数の突起の各先端面が前記環状溝の側壁面に摺動自在に密着するように構成されることを特徴とする。 That is, the seal ring of the present invention is
It is attached to an annular groove provided in one of the two members that rotate relatively, and is slidably in close contact with the side wall surface of the annular groove and the peripheral surface of the other member, In a seal ring for sealing an annular gap between the two members,
The side surface facing the side wall surface of the annular groove is formed of a stepped surface that is recessed so that the groove bottom side of the annular groove is separated from the side wall surface, and a plurality of surfaces projecting toward the side wall surface on the recessed surface Are provided to be independent of each other,
Of the side surfaces, the surface on the other member side is slidably in close contact with the side wall surface of the annular groove to form a seal surface, and the front end surfaces of the plurality of protrusions are on the side wall surface of the annular groove. It is configured so as to be slidably adhered.
　本発明によれば、段差面で構成された側面のうち他方の部材側の面だけでなく、複数の突起の各先端面が環状溝の側壁面に摺動自在に接触する。すなわち、側面が段差面で構成されたシールリングにおいて、シール面だけでなく、複数の突起の各先端面が環状溝の側壁面に摺動自在に接触する。従って、面圧を低下させることができる。また、面圧の低下に寄与する複数の突起は、それぞれ独立するように設けられているので、熱を効率よく逃がすことができ、発熱量の抑制を図ることもできる。更に、凹んだ面に設けられた複数の突起の先端面が環状溝の側壁面に摺動自在に接触するため、シールリングが径方向に対して傾いてしまうことを抑制でき、シールリングの姿勢を安定させることができる。これにより、部分的に摺動摩耗が促進してしまうことを抑制できる。 According to the present invention, not only the surface on the other member side among the side surfaces constituted by the step surfaces, but also the respective front end surfaces of the plurality of protrusions slidably contact the side wall surface of the annular groove. That is, in the seal ring whose side surface is formed of a stepped surface, not only the seal surface, but also the tip surfaces of the plurality of protrusions slidably contact the side wall surface of the annular groove. Accordingly, the surface pressure can be reduced. In addition, since the plurality of protrusions that contribute to the reduction of the surface pressure are provided so as to be independent from each other, heat can be efficiently released, and the amount of generated heat can be suppressed. Furthermore, since the tip surfaces of the plurality of protrusions provided on the recessed surface are slidably in contact with the side wall surface of the annular groove, the seal ring can be prevented from being inclined with respect to the radial direction, and the attitude of the seal ring Can be stabilized. Thereby, it can suppress that sliding wear accelerates | stimulates partially.
　以上説明したように、本発明によれば、面圧の低下を図りつつ、発熱量の抑制を図ることができる。 As described above, according to the present invention, it is possible to suppress the amount of generated heat while reducing the surface pressure.
図１は本発明の実施例１に係るシールリングの側面図（一方側の側面図）である。FIG. 1 is a side view (one side view) of a seal ring according to Embodiment 1 of the present invention. 図２は本発明の実施例１に係るシールリングの外周面側から見た図である。FIG. 2 is a view as seen from the outer peripheral surface side of the seal ring according to the first embodiment of the present invention. 図３は本発明の実施例１に係るシールリングの側面図（他方側の側面図）である。FIG. 3 is a side view (side view of the other side) of the seal ring according to Embodiment 1 of the present invention. 図４は本発明の実施例１に係るシールリングの装着状態を示す模式的断面図である。FIG. 4 is a schematic cross-sectional view showing a mounting state of the seal ring according to the first embodiment of the present invention. 図５は本発明の実施例１に係るシールリングの一部破断斜視図である。FIG. 5 is a partially broken perspective view of the seal ring according to the first embodiment of the present invention. 図６は本発明の実施例２に係るシールリングの一部破断斜視図である。FIG. 6 is a partially broken perspective view of a seal ring according to Embodiment 2 of the present invention. 図７は本発明の実施例３に係るシールリングの一部破断斜視図である。FIG. 7 is a partially broken perspective view of a seal ring according to Embodiment 3 of the present invention. 図８は従来例１に係るシールリングの使用状態を示す模式的断面図である。FIG. 8 is a schematic cross-sectional view showing a use state of the seal ring according to Conventional Example 1. 図９は従来例２に係るシールリングの使用状態を示す模式的断面図である。FIG. 9 is a schematic cross-sectional view showing a usage state of the seal ring according to Conventional Example 2.
　以下に図面を参照して、この発明を実施するための形態を、実施例に基づいて例示的に詳しく説明する。ただし、この実施例に記載されている構成部品の寸法、材質、形状、その相対配置などは、特に特定的な記載がない限りは、この発明の範囲をそれらのみに限定する趣旨のものではない。 DETAILED DESCRIPTION Hereinafter, embodiments for carrying out the present invention will be exemplarily described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. .
　（実施例１）
　＜シールリングの構成＞
　図１～図５を参照して、本発明の実施例１に係るシールリングについて説明する。本実施例に係るシールリング１０は、相対的に回転する回転軸２０とハウジング３０との間の環状隙間を封止するために用いられる。また、シールリング１０は、回転軸２０に設けられた環状溝２１に装着される。そして、シールリング１０は、この環状溝２１の側壁面と、ハウジング３０に設けられた軸孔（回転軸２０が挿通される軸孔）の内周面に対してそれぞれ摺動自在に密着することによって、上記の環状隙間を封止する（図４参照）。なお、図４中右側が高圧側（Ｈ）であり、左側が低圧側（Ｌ）である。例えば、高圧側（Ｈ）には油などの密封対象流体が密封されており、低圧側（Ｌ）は大気側となる。シールリング１０は、高圧側（Ｈ）からの圧力によって低圧側（Ｌ）に押圧されることにより、環状溝２１における低圧側（Ｌ）の側壁面に対して摺動自在に接触する。 Example 1
<Configuration of seal ring>
A seal ring according to Embodiment 1 of the present invention will be described with reference to FIGS. The seal ring 10 according to the present embodiment is used to seal an annular gap between the rotating shaft 20 and the housing 30 that rotate relatively. Further, the seal ring 10 is mounted in an annular groove 21 provided on the rotary shaft 20. The seal ring 10 is slidably in close contact with the side wall surface of the annular groove 21 and the inner peripheral surface of a shaft hole provided in the housing 30 (a shaft hole through which the rotary shaft 20 is inserted). To seal the annular gap (see FIG. 4). In FIG. 4, the right side is the high pressure side (H) and the left side is the low pressure side (L). For example, a fluid to be sealed such as oil is sealed on the high pressure side (H), and the low pressure side (L) is the atmosphere side. The seal ring 10 is slidably brought into contact with the side wall surface on the low pressure side (L) in the annular groove 21 by being pressed to the low pressure side (L) by the pressure from the high pressure side (H).
　本実施例に係るシールリング１０は、樹脂材（例えばＰＰＳ）によって構成される。そして、シールリング１０の環状溝２１への装着性を考慮して、シールリング１０の周方向の１か所には、切断部（合口部）１１が設けられている。本実施例においては、この切断部１１の構造として、環境温度の変化に伴ってシールリング１０の周長が変化しても安定したシール性能を発揮する特殊ステップカット構造が採用されている。なお、特殊ステップ構造とは、図１～図３から明らかなように、シールリング１０における両側面及び外周面側から見た場合に、いずれも段差を有するように切断された構造である。 The seal ring 10 according to the present embodiment is made of a resin material (for example, PPS). In consideration of the mounting property of the seal ring 10 to the annular groove 21, a cutting portion (abutting portion) 11 is provided at one place in the circumferential direction of the seal ring 10. In the present embodiment, a special step cut structure that exhibits stable sealing performance even when the circumference of the seal ring 10 changes as the environmental temperature changes is adopted as the structure of the cutting portion 11. As is apparent from FIGS. 1 to 3, the special step structure is a structure that is cut so as to have a step when viewed from both side surfaces and the outer peripheral surface side of the seal ring 10.
　また、本実施例に係るシールリング１０においては、その両側面は、環状溝２１の溝底側の方が環状溝２１の側壁面から離れるように凹む段差面で構成されている。つまり、シールリング１０の両側面は、いずれも内周面側の方が凹む段差面で構成されている。ただし、切断部１１の付近においては、安定したシール性を発揮させるために段差を設けていない。なお、本実施例に係るシールリング１０においては、装着性の観点（向きを気にしないで装着できること）及び高圧側（Ｈ）と低圧側（Ｌ）が入れ替わる場合にも適応できるようにするために、軸方向の中心面に対して対称的な形状となっている。従って、シールリング１０の両側面は、いずれも環状溝２１における摺動面となる側壁面（低圧側（Ｌ）の側壁面）に対向する側面となり得る。 Further, in the seal ring 10 according to the present embodiment, both side surfaces thereof are constituted by stepped surfaces that are recessed so that the groove bottom side of the annular groove 21 is separated from the side wall surface of the annular groove 21. That is, both side surfaces of the seal ring 10 are each formed of a stepped surface that is recessed on the inner peripheral surface side. However, no step is provided in the vicinity of the cutting portion 11 in order to exhibit stable sealing performance. Note that the seal ring 10 according to the present embodiment can be adapted from the viewpoint of wearability (being able to be worn without worrying about orientation) and when the high pressure side (H) and the low pressure side (L) are switched. Furthermore, it has a symmetrical shape with respect to the axial center plane. Therefore, both side surfaces of the seal ring 10 can be side surfaces that face the side wall surface (the low-pressure side (L) side wall surface) that is the sliding surface of the annular groove 21.
　そして、凹んだ面１２には、環状溝２１の側壁面に向かって突出する複数の突起１３がそれぞれ独立するように設けられている。本実施例においては、これら複数の突起１３は、周方向に沿ってそれぞれ等間隔となるように配置されている。また、これら複数の突起１３の先端面は、シールリング１０における側面のうち外周側の突出した面と同一平面上に位置するように構成されている（図４参照）。更に、本実施例においては、平面的に見た場合に、シールリング１０の円の中心から各突起１３までの距離がいずれも等しくなるようにそれぞれの突起１３が配置されている。なお、各突起１３間の間隔は、面圧の分布をできるだけ均一にするために、極力狭くするのが望ましい。 A plurality of projections 13 projecting toward the side wall surface of the annular groove 21 are provided on the recessed surface 12 so as to be independent from each other. In the present embodiment, the plurality of protrusions 13 are arranged at equal intervals along the circumferential direction. Moreover, the front end surfaces of the plurality of protrusions 13 are configured so as to be located on the same plane as the protruding surface on the outer peripheral side among the side surfaces of the seal ring 10 (see FIG. 4). Furthermore, in this embodiment, each projection 13 is arranged so that the distance from the center of the circle of the seal ring 10 to each projection 13 is equal when viewed in plan. It should be noted that the interval between the protrusions 13 is preferably as narrow as possible in order to make the distribution of the surface pressure as uniform as possible.
　＜シールリングの動作＞
　以上のように構成されたシールリング１０を回転軸２０に設けられた環状溝２１に装着すると、上記の通り、シールリング１０は、環状溝２１の側壁面と、ハウジング３０に設けられた軸孔の内周面に対してそれぞれ摺動自在に密着する。ここで、シールリング１０の外周面側は、全面に亘って軸孔の内周面に対して摺動自在に密着する。つまり、シールリング１０の外周面全体がシール面となる。一方、シールリング１０の側面側は、ハウジング３０側（つまり外周面側）における突出した面の一部（外周面側の一部を除く部分）が環状溝２１の側壁面に摺動自在に密着することでシール面を形成する。なお、この側面側のシール面については、シール性を確保するために必要な最低限のシール接触幅を設定した上で、放熱の観点から、できるだけ狭い接触幅に設定するのが望ましい。 <Operation of seal ring>
When the seal ring 10 configured as described above is attached to the annular groove 21 provided in the rotary shaft 20, as described above, the seal ring 10 includes the side wall surface of the annular groove 21 and the shaft hole provided in the housing 30. Are slidably in close contact with the inner peripheral surface. Here, the outer peripheral surface side of the seal ring 10 is slidably adhered to the inner peripheral surface of the shaft hole over the entire surface. That is, the entire outer peripheral surface of the seal ring 10 becomes a seal surface. On the other hand, the side surface side of the seal ring 10 is slidably in close contact with the side wall surface of the annular groove 21 at a portion of the protruding surface on the housing 30 side (that is, the outer peripheral surface side). By doing so, a sealing surface is formed. In addition, it is desirable to set the seal surface on the side surface side to be as narrow as possible from the viewpoint of heat dissipation after setting a minimum seal contact width necessary for ensuring sealing performance.
　また、本実施例においては、凹んだ面１２に設けられている複数の突起１３の各先端面も、環状溝２１の側壁面に摺動自在に密着する。 In the present embodiment, the tip surfaces of the plurality of protrusions 13 provided on the recessed surface 12 are also slidably adhered to the side wall surface of the annular groove 21.
　＜本実施例に係るシールリングの優れた点＞
　本実施例に係るシールリング１０によれば、段差面で構成された側面のうちハウジング３０側（つまり外周面側）の面だけでなく、複数の突起１３の各先端面が環状溝２１の側壁面に摺動自在に接触する。すなわち、側面が段差面で構成されたシールリング１０において、シール面だけでなく、複数の突起１３の各先端面が環状溝２１の側壁面に摺動自在に接触する。従って、単位面積当たりの圧力を低減させることができ、面圧を低減させることが可能となる。 <Excellent points of seal ring according to this embodiment>
According to the seal ring 10 according to the present embodiment, not only the side surface constituted by the stepped surface but the surface on the housing 30 side (that is, the outer peripheral surface side), each tip surface of the plurality of protrusions 13 is on the annular groove 21 side. Touch the wall surface slidably. That is, in the seal ring 10 whose side surfaces are stepped surfaces, not only the seal surface, but also the tip surfaces of the plurality of protrusions 13 are slidably in contact with the side wall surface of the annular groove 21. Therefore, the pressure per unit area can be reduced, and the surface pressure can be reduced.
　また、面圧の低下に寄与する複数の突起１３は、それぞれ独立するように設けられているので、熱を効率よく逃がすことができ、発熱量の抑制を図ることもできる。 Also, since the plurality of protrusions 13 that contribute to the reduction of the surface pressure are provided independently of each other, heat can be released efficiently and the amount of generated heat can be suppressed.
　更に、凹んだ面１２に設けられた複数の突起１３の先端面が環状溝２１の側壁面に摺動自在に接触するため、シールリング１０が径方向に対して傾いてしまうことを抑制でき、シールリング１０の姿勢を安定させることができる。つまり、例えば、上述した図８に示す従来例に係るシールリング５０の場合には、凹んだ面が環状溝２１の側壁面に近づく方向に傾き易い（つまり、図８中時計回り方向に傾き易い）。これに対し、本実施例に係るシールリング１０の場合には、複数の突起１３の先端面が環状溝２１の側壁面に摺動自在に接触するため、そのような傾きを抑制できる。これにより、部分的に面圧が高くなってしまうことを抑制でき、一部分の摺動摩耗が促進してしまうことを抑制できる。 Furthermore, since the tip surfaces of the plurality of protrusions 13 provided on the recessed surface 12 are slidably in contact with the side wall surface of the annular groove 21, it is possible to suppress the seal ring 10 from being inclined with respect to the radial direction, The posture of the seal ring 10 can be stabilized. That is, for example, in the case of the seal ring 50 according to the conventional example shown in FIG. 8 described above, the recessed surface tends to tilt in the direction approaching the side wall surface of the annular groove 21 (that is, it tends to tilt in the clockwise direction in FIG. 8). ). On the other hand, in the case of the seal ring 10 according to the present embodiment, the tip surfaces of the plurality of protrusions 13 are slidably in contact with the side wall surface of the annular groove 21, so that such inclination can be suppressed. Thereby, it can suppress that a surface pressure becomes partially high, and can suppress that a part of sliding wear accelerates | stimulates.
　以上のように、本実施例に係るシールリング１０によれば、面圧の低下を図りつつ、発熱量の抑制を図ることができる。従って、高圧・高回転の環境下においても、長期に亘って安定的にシール性を発揮させることが可能となる。また、耐熱性に優れたエンジニアプラスチックなどの高価な材料を用いる必要もない。更に、切断部１１から意図的に油などを必要以上にリークさせる必要もないので、シール性を高めることができる。 As described above, according to the seal ring 10 according to this embodiment, it is possible to suppress the amount of generated heat while reducing the surface pressure. Therefore, even in a high pressure / high rotation environment, it is possible to stably exhibit the sealing performance over a long period of time. Further, it is not necessary to use expensive materials such as engineer plastics having excellent heat resistance. Furthermore, since it is not necessary to intentionally leak oil or the like from the cutting portion 11 more than necessary, the sealing performance can be improved.
　（実施例２）
　図６には、本発明の実施例２が示されている。本実施例においては、突起の配置構成を実施例１とは異なるようにした場合を説明する。その他の構成および作用については実施例１と同一なので、同一の構成部分については同一の符号を付して、その説明は省略する。 (Example 2)
FIG. 6 shows a second embodiment of the present invention. In the present embodiment, a case where the arrangement of the protrusions is different from that in the first embodiment will be described. Since other configurations and operations are the same as those in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
　上記実施例１の場合には、平面的に見た場合にシールリング１０の円の中心から各突起１３までの距離がいずれも等しくなるようにそれぞれの突起１３が配置される構成を採用している。これに対して本実施例に係るシールリング１０の場合には、外径側に偏った位置に等間隔に並ぶ突起１３ａと、内径側に偏った位置に等間隔に並ぶ突起１３ｂが、周方向に向かって交互に並ぶように配置されている。なお、平面的に見た場合には、シールリング１０の円の中心から各突起１３ａまでの距離はいずれも等しく、かつ円の中心から各突起１３ｂまでの距離はいずれも等しくなるように配置されている。なお、図６には示されていないが、突起１３ａ，１３ｂはシールリング１０の両側面にそれぞれ設けられている。 In the case of the first embodiment, a configuration is adopted in which each protrusion 13 is arranged so that the distance from the center of the circle of the seal ring 10 to each protrusion 13 is equal when viewed in plan. Yes. On the other hand, in the case of the seal ring 10 according to the present embodiment, the protrusions 13a arranged at equal intervals at the position biased toward the outer diameter side and the protrusions 13b arranged at equal intervals at the position biased toward the inner diameter side have a circumferential direction. It is arranged so that it may line up alternately toward. In plan view, the distance from the center of the circle of the seal ring 10 to each projection 13a is equal, and the distance from the center of the circle to each projection 13b is equal to each other. ing. Although not shown in FIG. 6, the protrusions 13 a and 13 b are provided on both side surfaces of the seal ring 10.
　本実施例の場合には、シールリング１０における環状溝２１の側壁面に対する摺動位置を、実施例１に比べて径方向に対してより分散させることができる。これにより、シールリング１０の姿勢をより安定化させ、部分的に摺動摩耗が促進してしまうことをより一層抑制させることができる。 In the case of the present embodiment, the sliding position with respect to the side wall surface of the annular groove 21 in the seal ring 10 can be more dispersed in the radial direction than in the first embodiment. Thereby, the attitude | position of the seal ring 10 can be stabilized more and it can suppress further that sliding abrasion accelerates | stimulates partially.
　（実施例３）
　図７には、本発明の実施例３が示されている。本実施例においては、段差部分に複数の溝を設けた場合を示す。その他の構成および作用については実施例１と同一なので、同一の構成部分については同一の符号を付して、その説明は省略する。 (Example 3)
FIG. 7 shows a third embodiment of the present invention. In this embodiment, a case where a plurality of grooves are provided in the stepped portion is shown. Since other configurations and operations are the same as those in the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.
　本実施例に係るシールリング１０においても、実施例１の場合と同様に、両側面は段差面で構成されており、両側面の凹んだ面１２には複数の突起１３が設けられている。そして、本実施例の場合には、段差部分に複数の溝１４が設けられている。これにより、シールリング１０における側面側のシール面の部分で発生する熱を効率良く逃がすことができ、発熱量を抑制することが可能となる。また、シール面においては摺動面積が減少しているものの、複数の突起１３が設けられていることによって、面圧が高くなってしまうことも抑制できる。なお、面圧分布をより均一にするために、周方向に対して溝１４を設ける位置と突起１３を設ける位置は同じ位置に配置するのが望ましい。言い換えれば、平面的に見た場合に、シールリング１０の中心位置から突起１３を通る直線状に溝１４を設けるのが望ましい。 Also in the seal ring 10 according to the present embodiment, as in the case of the first embodiment, both side surfaces are constituted by stepped surfaces, and a plurality of protrusions 13 are provided on the recessed surface 12 of both side surfaces. In the case of the present embodiment, a plurality of grooves 14 are provided in the step portion. As a result, heat generated at the side seal surface portion of the seal ring 10 can be efficiently released, and the amount of heat generated can be suppressed. In addition, although the sliding area is reduced on the sealing surface, it is possible to suppress the surface pressure from being increased by providing the plurality of protrusions 13. In order to make the surface pressure distribution more uniform, it is desirable that the positions where the grooves 14 are provided and the positions where the protrusions 13 are provided are the same in the circumferential direction. In other words, it is desirable to provide the groove 14 in a straight line passing through the protrusion 13 from the center position of the seal ring 10 when viewed in plan.
　（その他）
　上記実施例においては、軸側に環状溝を設け、当該環状溝内に装着されるシールリングの場合を示したが、本発明はハウジングの軸孔内周面に設けられた環状溝内に装着されるシールリングにも適用可能である。この場合には、シールリングの側面は、外周面側の方が凹む段差面で構成されることは言うまでもない。 (Other)
In the above embodiment, an annular groove is provided on the shaft side, and the seal ring mounted in the annular groove is shown. However, the present invention is mounted in the annular groove provided on the inner peripheral surface of the shaft hole of the housing. The present invention is also applicable to a seal ring. In this case, needless to say, the side surface of the seal ring is formed of a stepped surface that is recessed on the outer peripheral surface side.
　１０　シールリング
　１１　切断部
　１２　凹んだ面
　１３，１３ａ，１３ｂ　突起
　１４　溝
　２０　回転軸
　２１　環状溝
　３０　ハウジング DESCRIPTION OF SYMBOLS 10 Seal ring 11 Cutting part 12 Recessed surface 13, 13a, 13b Protrusion 14 Groove 20 Rotating shaft 21 Annular groove 30 Housing

Claims (1)

  1. 　相対的に回転する２部材のうちの一方の部材に設けられた環状溝に装着され、該環状溝の側壁面と、他方の部材の周面に対してそれぞれ摺動自在に密着することによって、前記２部材間の環状隙間を封止するシールリングにおいて、
    　前記環状溝の側壁面に対向する側面が、前記環状溝の溝底側の方が前記側壁面から離れるように凹む段差面で構成され、かつ凹んだ面に前記側壁面に向かって突出する複数の突起がそれぞれ独立するように設けられ、
    　前記側面のうち前記他方の部材側の面が前記環状溝の側壁面に摺動自在に密着することでシール面が形成され、かつ前記複数の突起の各先端面が前記環状溝の側壁面に摺動自在に密着するように構成されることを特徴とするシールリング。     It is attached to an annular groove provided in one of the two members that rotate relatively, and is slidably in close contact with the side wall surface of the annular groove and the peripheral surface of the other member, In a seal ring for sealing an annular gap between the two members,
    The side surface facing the side wall surface of the annular groove is formed of a stepped surface that is recessed so that the groove bottom side of the annular groove is separated from the side wall surface, and a plurality of surfaces projecting toward the side wall surface on the recessed surface Are provided to be independent of each other,
    Of the side surfaces, the surface on the other member side is slidably in close contact with the side wall surface of the annular groove to form a seal surface, and the front end surfaces of the plurality of protrusions are on the side wall surface of the annular groove. A seal ring configured to be slidably adhered.
PCT/JP2012/060815 2011-05-31 2012-04-23 Seal ring WO2012165083A1 (en)

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JP2011121600A JP2012247048A (en) 2011-05-31 2011-05-31 Seal ring
JP2011-121600 2011-05-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6223633B1 (en) * 2017-03-13 2017-11-01 Ｔｐｒ株式会社 Seal ring and sealing device

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Publication number Priority date Publication date Assignee Title
JPH0388062U (en) * 1989-12-26 1991-09-09
JPH0561566U (en) * 1992-01-31 1993-08-13 エヌティエヌ株式会社 Seal ring
JPH0645172U (en) * 1992-11-30 1994-06-14 エヌオーケー株式会社 Seal ring
JPH0680954U (en) * 1993-03-12 1994-11-15 エヌオーケー株式会社 Sealing device
JP2007107547A (en) * 2005-10-11 2007-04-26 Nok Corp Seal ring

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0388062U (en) * 1989-12-26 1991-09-09
JPH0561566U (en) * 1992-01-31 1993-08-13 エヌティエヌ株式会社 Seal ring
JPH0645172U (en) * 1992-11-30 1994-06-14 エヌオーケー株式会社 Seal ring
JPH0680954U (en) * 1993-03-12 1994-11-15 エヌオーケー株式会社 Sealing device
JP2007107547A (en) * 2005-10-11 2007-04-26 Nok Corp Seal ring

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6223633B1 (en) * 2017-03-13 2017-11-01 Ｔｐｒ株式会社 Seal ring and sealing device
WO2018167828A1 (en) 2017-03-13 2018-09-20 Ｔｐｒ株式会社 Seal ring and sealing device
US10760687B2 (en) 2017-03-13 2020-09-01 Tpr Co., Ltd. Seal ring and sealing device

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