JP5137566B2 - Resin seal ring - Google Patents
Resin seal ring Download PDFInfo
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- JP5137566B2 JP5137566B2 JP2007338389A JP2007338389A JP5137566B2 JP 5137566 B2 JP5137566 B2 JP 5137566B2 JP 2007338389 A JP2007338389 A JP 2007338389A JP 2007338389 A JP2007338389 A JP 2007338389A JP 5137566 B2 JP5137566 B2 JP 5137566B2
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- Prior art keywords
- inner peripheral
- seal ring
- convex portion
- peripheral side
- joint
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- 229920005989 resin Polymers 0.000 title description 7
- 239000011347 resin Substances 0.000 title description 7
- 230000002093 peripheral effect Effects 0.000 claims description 34
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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Description
本発明は樹脂製シールリングの合口の形状に関する。 The present invention relates to the shape of a joint of a resin seal ring.
自動車のオートマチックトランスミッション内で多板クラッチを作動させる為に油圧回路に装着される回転シールリングや、多板クラッチを作動させる為に装備されているピストンに装着される往復動シールリング、さらには、金属ベルトを用いたオートマチックトランスミッションのＶプーリーを作動させるピストンに装着される往復動シールリングは、合成樹脂材、具体的には、たとえば、ポリテトラフルオロエチレン樹脂（ＰＴＦＥ）やポリエーテルエーテルケトン樹脂（ＰＥＥＫ）に、炭素繊維、黒鉛粉末等を混合した樹脂材を用いて常用手段により成形される。 A rotary seal ring that is mounted on a hydraulic circuit to operate a multi-plate clutch in an automatic transmission of an automobile, a reciprocating seal ring that is mounted on a piston that is equipped to operate a multi-plate clutch, A reciprocating seal ring mounted on a piston for operating a V pulley of an automatic transmission using a metal belt is a synthetic resin material, specifically, for example, polytetrafluoroethylene resin (PTFE) or polyether ether ketone resin ( PEEK) is molded by conventional means using a resin material in which carbon fiber, graphite powder or the like is mixed.
これらのシールリング合口には、ストレート形状、斜め形状、ダブルアングル形状やトリプルステップ形状等の合口があり、シール部の流体の漏れ許容量に応じて合口形状が選定されている。（特許文献１参照） These seal ring joints include joints such as a straight shape, an oblique shape, a double angle shape, and a triple step shape, and the joint shape is selected according to the fluid leakage allowable amount of the seal portion. (See Patent Document 1)
近年、車輌の性能向上と環境保護の観点から燃費向上が望まれており、シールリングにもリングとリング溝壁面との間のフリクション低減及びリング溝の加工精度にとらわれずに良好なシール性が望まれている。 In recent years, fuel efficiency has been improved from the viewpoint of improving vehicle performance and environmental protection, and the seal ring also has good sealing performance regardless of the friction reduction between the ring and the ring groove wall and the processing accuracy of the ring groove. It is desired.
さらに近年では、漏れ許容量をより低くさせる傾向にあり、ストレート形状、斜め形状の合口を持ったリングでは近年要求される漏れ許容量を満足させることができなくなっている。このため、ダブルアングル形状やトリプルステップ形状の合口のシールリングは漏れ許容量を満足させるので多用されている。 Furthermore, in recent years, there is a tendency to reduce the allowable leakage amount, and it has become impossible to satisfy the leakage allowable amount required in recent years with a ring having a straight shape and an oblique shape. For this reason, double-angle and triple-step abutment seal rings are frequently used because they satisfy the leakage tolerance.
樹脂製シールリングにおいて、リークを少なくできる特殊な合口として、複合ステップ形状が知られている。（特許文献２参照）一方、この形態の合口のリップ部、すなわち勘合する凸部において、製造工程時或いは使用時の折損が懸念され、ひとつの対応法が知られている。（特許文献３参照） A composite step shape is known as a special joint that can reduce leakage in a resin seal ring. (See Patent Document 2) On the other hand, in the lip portion of the joint, that is, the convex portion to be fitted, there is concern about breakage during the manufacturing process or use, and one countermeasure is known. (See Patent Document 3)
複合ステップ形状等の特殊な合口を有するシールリングにおける、合口凸部の根元部と内周面との接続面とは、直線部と円弧形状部で接合されており、凸部の根元部の強度向上を図るための円弧寸法には、その拡大に限度があった。
In a seal ring having a special joint such as a composite step shape, the connection surface between the root part of the joint convex part and the inner peripheral surface is joined by a straight part and an arc-shaped part, and the strength of the base part of the convex part There was a limit to the expansion of the arc size for improvement.
特殊な合口を有したシールリングにおいて、製造時、或いは使用時に凸部の根元部に発生する応力集中により凸部が折損することがある。 In a seal ring having a special joint, the convex portion may break due to stress concentration generated at the root portion of the convex portion during manufacture or use.
本発明は前記課題を解決するために、合口を有する樹脂性シールリングであって、対向する合口端部は外周側及び内周側に異なる対向面を有し、前記外周側合口端部には互いに周方向に嵌合可能な凸部と凹部が形成されたものにおいて、前記内周側合口端部は対向面が軸方向に平行かつ半径方向に対して２０度以上、４０度以下の角度で、対向面どうしの間隔が内周側に向けて大きくなるように傾斜したものとする。更に、前記凸部の根元の形状は、前記傾斜した対向面とシールリングの内周面との交点で前記傾斜した対向面と内接し、かつ前記凸部の内周面にも内接する円弧形状で接続したことにより、前記外力による凸部の根元部に作用する応力の集中を緩和する形状を有したシールリングを提供する。 In order to solve the above-mentioned problem, the present invention is a resinous seal ring having an abutment. Opposing abutment end portions have different facing surfaces on the outer peripheral side and the inner peripheral side. In the case where convex portions and concave portions that can be fitted to each other in the circumferential direction are formed, the inner peripheral side abutting end portion is parallel to the axial direction and has an angle of 20 degrees or more and 40 degrees or less with respect to the radial direction. Suppose that the interval between the opposing surfaces is inclined so as to increase toward the inner peripheral side. Furthermore, the shape of the base of the convex portion is an arc shape inscribed in the inclined opposing surface at the intersection of the inclined opposing surface and the inner peripheral surface of the seal ring and inscribed in the inner peripheral surface of the convex portion. The seal ring having a shape that relieves the concentration of stress acting on the root portion of the convex portion due to the external force.
本発明によると、合口を有する樹脂性シールリングであって、一方の合口には内径側に対向面と、外径側に樹脂性シールリングの外周に沿って一部が突き出した凸部と、前記凸部と軸方向に並列に凹部とを有し、他方の合口には対向する合口端部が互いに嵌合可能なように、対向面と凹部と、凸部が配置された特殊な合口を有するものにおいて、前記合口の内周側対向面を所定の角度で傾斜させ、更に前記凸部の根元の形状は、前記傾斜した対向面とシールリングの内周面との交点で前記傾斜した対向面と内接し、かつ前記凸部の内周面にも内接する円弧形状で接続したので、外力による前記凸部の根元部に作用する応力の集中を緩和することができる。
前記対向面の角度は、シールリングを取付ける軸径とリング厚さによって選択的に設定されるものではあるが、過度に小さい値であると従来技術との差がみられず、応力集中の緩和が適わない。また、前記対向面の角度が過度に大きいと凸部の形状が不明確になり、合口部の嵌合機能を果たせなくなる。
従って、前記内周側合口端部は対向面が軸方向に平行かつ半径方向に対して２０度以上、４０度以下の角度が最適であり、更に望ましくは２９度以上、３１度以下の範囲で対向面どうしの間隔が内周側に向けて大きくしたものとするのが最も効果を発揮する。
According to the present invention, it is a resinous seal ring having a joint, one of the joints is a facing surface on the inner diameter side, and a convex part protruding partly along the outer periphery of the resin sealing ring on the outer diameter side, The convex part and the concave part parallel to the axial direction are provided, and the opposite joint, the concave part, and the special joint part in which the convex part is arranged so that the opposite joint part can be fitted to each other joint part. The inner peripheral side facing surface of the joint is inclined at a predetermined angle, and the base shape of the convex portion is inclined at the intersection of the inclined facing surface and the inner peripheral surface of the seal ring. Since it is connected in an arc shape inscribed in the surface and inscribed in the inner peripheral surface of the convex portion, the concentration of stress acting on the root portion of the convex portion due to external force can be reduced.
The angle of the facing surface is selectively set depending on the shaft diameter and the ring thickness to which the seal ring is attached, but if it is an excessively small value, there is no difference from the prior art, and stress concentration is alleviated. Is not suitable. Moreover, when the angle of the said opposing surface is too large, the shape of a convex part will become indefinite and the fitting function of a joint part cannot be fulfilled.
Therefore, it is optimal that the inner peripheral abutment end has an opposing surface parallel to the axial direction and an angle of 20 degrees or more and 40 degrees or less with respect to the radial direction, and more preferably 29 degrees or more and 31 degrees or less. It is most effective when the distance between the opposing surfaces is increased toward the inner peripheral side.
本発明の１実施形態を、以下図１〜図３に基づいて説明する。 An embodiment of the present invention will be described below with reference to FIGS.
特殊な合口である複合ステップ形状の合口を有するシールリングを用いて説明する。図１はシールリングの合口を閉じる前の状態であり、従来の特殊な合口形状の凸部Ａの根元部Ｂを示す。凸部Ａは、凸部の内周１に内接する円弧形状２を介して内径側対向面３に接続される。内径側対向面３とシールリングの内周面４との交点Ｃがある。 A description will be given using a seal ring having a composite step-shaped joint that is a special joint. FIG. 1 is a state before closing the joint of the seal ring, and shows a root portion B of a conventional special joint-shaped convex portion A. FIG. The convex portion A is connected to the inner diameter side facing surface 3 via an arc shape 2 inscribed in the inner periphery 1 of the convex portion. There is an intersection C between the inner diameter side facing surface 3 and the inner peripheral surface 4 of the seal ring.
次に、本発明では前記内径側対向面３を後述する所定の傾斜５で構成する。傾斜５の角度は、凸部の根元部Ｂを基準に３０度の角度で対向面どうしの間隔が内周側に向けて大きくしたものとする（図２）。この傾斜した内周側対向面６とシールリングの内周面４の交点をＤとする。凸部Ａの根元は、傾斜した内周側対向面６とＤ点で内接し、かつ凸部Ａの内周面１にも内接する円弧形状７で接続する（図３）。 Next, in the present invention, the inner diameter side facing surface 3 is configured with a predetermined inclination 5 described later. The angle of the inclination 5 is assumed to be an angle of 30 degrees with respect to the base B of the convex portion, and the interval between the opposing surfaces is increased toward the inner peripheral side (FIG. 2). Let D be the intersection of the inclined inner peripheral side facing surface 6 and the inner peripheral surface 4 of the seal ring. The base of the convex portion A is inscribed with the inclined inner peripheral side facing surface 6 at a point D and is connected with an arc shape 7 inscribed in the inner peripheral surface 1 of the convex portion A (FIG. 3).
これにより、凸部Ａの根元の円弧形状７の曲率半径を従来の円弧形状２より拡大することが可能となり、外力により凸部Ａの根元部Ｂに作用する応力集中を大幅に緩和することが可能となり、凸部Ａの根元部Ｂでの折損を抑制することが可能となる。 This makes it possible to expand the radius of curvature of the arc shape 7 at the base of the convex portion A as compared with the conventional arc shape 2, and to significantly relieve stress concentration acting on the base portion B of the convex portion A due to external force. It becomes possible, and it becomes possible to suppress breakage at the root portion B of the convex portion A.
以下に本発明による効果を具体的な例を挙げて説明する。φ６０ｍｍ（リング外周部の直径）のシールリングに於いて、リング半径方向寸法（リング厚さ）１．６ｍｍ、凸部の半径方向寸法１．０ｍｍの設定とする。このとき、従来の円弧形状の曲率半径は、リング内周面と合口の対向面の内径側の交点と、合口の対向面と凸部の内周面の双方に内接する円弧であるから、０．６ｍｍとなる。 The effects of the present invention will be described below with specific examples. In a seal ring of φ60 mm (diameter of the outer periphery of the ring), the ring radial dimension (ring thickness) is set to 1.6 mm, and the radial dimension of the convex part is set to 1.0 mm. At this time, since the radius of curvature of the conventional arc shape is an arc inscribed in the intersection of the inner peripheral surface of the ring inner peripheral surface and the facing surface of the joint, and both the facing surface of the joint and the inner peripheral surface of the convex portion. 6 mm.
しかし、本発明によりこのリングの合口の対向面を、リング外周における法線に対して３０度傾斜させ、リング内周面と合口の内径側の対向面の交点で前記対向面と内接し、かつ凸部の内周面にも内接する円弧形状の曲率半径を求めると約１．２ｍｍとなり、従来に比して約２倍の大きさの曲率半径を有する円弧形状で接続することが可能である。
上記実施例ではリング厚さが十分にあるので、合口部の嵌合機能を損なわないように注意して、内周側対向面の傾斜を４０度に設定すると、円弧形状の曲率半径は約１．７ｍｍとすることができ、従来に比して約２．８倍の大きさの曲率半径を有する円弧形状で接続できる。
以上、説明したように本発明によれば、合口の内径側の対向面に２０度以上４０度以下の傾斜を付与することにより、合口凸部の内周面と対向面を従来の約２倍以上の曲率半径を有する円弧形状で結ぶことが可能となり、製造工程中での折損の発生をほぼ無くすことができた
。
However, according to the present invention, the facing surface of the abutment of the ring is inclined by 30 degrees with respect to the normal line on the outer periphery of the ring, inscribed with the facing surface at the intersection of the inner peripheral surface of the ring and the facing surface on the inner diameter side of the abutment, and When the radius of curvature of the arc shape inscribed in the inner peripheral surface of the convex portion is obtained, it is about 1.2 mm, and it is possible to connect with an arc shape having a radius of curvature about twice as large as that of the conventional one. .
In the above embodiment, since the ring thickness is sufficient, if the inclination of the inner peripheral facing surface is set to 40 degrees, paying attention not to impair the fitting function of the joint portion, the radius of curvature of the arc shape is about 1 .7 mm, and can be connected in an arc shape having a radius of curvature approximately 2.8 times larger than the conventional one.
As described above, according to the present invention, the inner peripheral surface of the abutment convex portion and the opposed surface are approximately twice as large as those of the conventional art by providing a slope of 20 degrees or more and 40 degrees or less to the opposed surface on the inner diameter side of the abutment. It was possible to tie them in an arc shape having the above curvature radius, and the occurrence of breakage during the manufacturing process could be almost eliminated.
本発明によるシールリングは、自動車をはじめとする様々な機器の、軸部、ピストン部のシール部に良好に適用できる。 The seal ring according to the present invention can be favorably applied to the seal portion of the shaft portion and the piston portion of various devices including automobiles.
１・・・・合口凸部の内周面
２・・・・従来の円弧形状
３・・・・対向面
４・・・・シールリング内周面
５・・・・対向面の角度
６・・・・傾斜対向面
７・・・・本発明による円弧形状
Ａ・・・・合口凸部
Ｂ・・・・合口凸部の根元部
Ｃ・・・・交点
Ｄ・・・・交点
DESCRIPTION OF SYMBOLS 1 .... Inner peripheral surface of joint convex part 2 .... Conventional circular arc shape 3 .... Opposing surface 4 .... Seal ring inner peripheral surface 5 .... Angle of opposing surface 6 .... ..Inclined facing surface 7 ... Arc shape according to the present invention A .... Abutment convex part B .... Root part of the abutment convex part C ... Intersection point D ... Intersection point
Claims (1)
対向する合口端部は外周側及び内周側に異なる対向面を有し、前記外周側合口端部には互いに周方向に嵌合可能な凸部と凹部が形成され、前記内周側合口端部は対向面が軸方向に平行で、かつ凸部の根元部における半径方向に対して２０度以上、４０度以下の角度で、対向面どうしの間隔が内周側に向けて大きくなるように傾斜し、
前記凸部の根元の形状は、前記傾斜した対向面とシールリングの内周面との交点で前記傾斜した対向面と内接し、かつ前記凸部の内周面に内接する円弧形状で接続することを特徴とする樹脂製シールリング。 A plastic sealing ring having an abutment joint,
Abutment edge facing have different opposing surface to the outer peripheral side and inner peripheral side, can be fitted convex and concave portions to each other in the circumferential direction on the outer peripheral side abutment edge is formed, the inner peripheral side abutment edge As for the portion, the opposing surfaces are parallel to the axial direction , and the interval between the opposing surfaces becomes larger toward the inner peripheral side at an angle of 20 degrees or more and 40 degrees or less with respect to the radial direction at the root of the convex portion. Tilt ,
The base of the convex portion is connected in an arc shape inscribed in the inclined opposing surface at the intersection of the inclined opposing surface and the inner peripheral surface of the seal ring and inscribed in the inner peripheral surface of the convex portion. plastic sealing ring, characterized in that.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007338389A JP5137566B2 (en) | 2007-12-28 | 2007-12-28 | Resin seal ring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007338389A JP5137566B2 (en) | 2007-12-28 | 2007-12-28 | Resin seal ring |
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| Publication Number | Publication Date |
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| JP2009156440A JP2009156440A (en) | 2009-07-16 |
| JP5137566B2 true JP5137566B2 (en) | 2013-02-06 |
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| JP2007338389A Expired - Fee Related JP5137566B2 (en) | 2007-12-28 | 2007-12-28 | Resin seal ring |
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| EP2886913A4 (en) * | 2012-07-25 | 2016-06-01 | Nok Corp | Fluorine-resin sealing ring |
| JP5418744B1 (en) * | 2012-07-25 | 2014-02-19 | Ｎｏｋ株式会社 | Fluororesin seal ring |
| JPWO2014045838A1 (en) * | 2012-09-20 | 2016-08-18 | Nok株式会社 | Sealing device |
| JP2017101736A (en) * | 2015-12-01 | 2017-06-08 | Nok株式会社 | Seal ring |
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| JP4215785B2 (en) * | 1994-06-30 | 2009-01-28 | Ｎｔｎ株式会社 | Manufacturing method of composite step cut type seal ring made of synthetic resin |
| JPH1061777A (en) * | 1996-05-30 | 1998-03-06 | Ntn Corp | Synthetic resin-made seal ring |
| JP4084729B2 (en) * | 2003-05-29 | 2008-04-30 | Ｎｔｎ株式会社 | Resin seal ring |
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