JPH09159026A - Piston ring - Google Patents
Piston ringInfo
- Publication number
- JPH09159026A JPH09159026A JP32059895A JP32059895A JPH09159026A JP H09159026 A JPH09159026 A JP H09159026A JP 32059895 A JP32059895 A JP 32059895A JP 32059895 A JP32059895 A JP 32059895A JP H09159026 A JPH09159026 A JP H09159026A
- Authority
- JP
- Japan
- Prior art keywords
- piston ring
- slope
- section
- piston
- outward
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、合口部からの流体
漏れが殆どなく、しかも合口部を容易に機械加工できる
単純な形状にしたピストンリングに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piston ring having a simple shape in which there is almost no fluid leakage from the abutment portion and the abutment portion can be easily machined.
【０００２】[0002]
【従来の技術】ピストンリングは、合口部を有し環状に
構成されたものが一般的である。合口部は通常ピストン
リングの両端平面の単なる突き合わせとされており、こ
のため合口部にピストンリングの半径方向に沿って合口
スリットが出来ている。この合口スリットはピストンリ
ングの上下を直線的に連通する流体の漏れ通路となるた
め、例えばコンプレッサのピストン外周にこのようなピ
ストンリングが装着されていると、シリンダ内圧力室か
ら合口スリットを通してエア漏れを起こす結果となる。
このエア漏れ量は１ストローク当りではごく微量でも総
ストローク回数で積算するとかなりの量になる。従って
コンプレッサや真空ポンプなどピストンリングを使用し
た機械の仕事効率を上げるためには、合口部からの流体
漏れを可及的に低減する必要がある。2. Description of the Related Art A piston ring is generally formed in an annular shape having a joint. The abutment portion is usually merely abutting the flat surfaces of both ends of the piston ring, and therefore, an abutment slit is formed in the abutment portion along the radial direction of the piston ring. This abutment slit serves as a fluid leakage passage that linearly communicates with the top and bottom of the piston ring.Therefore, if such a piston ring is mounted on the outer circumference of the piston of the compressor, air leaks from the pressure chamber in the cylinder through the abutment slit. Will result in.
Even if the amount of air leakage is very small per stroke, it becomes a considerable amount when integrated by the total number of strokes. Therefore, in order to improve the work efficiency of a machine using a piston ring such as a compressor or a vacuum pump, it is necessary to reduce the fluid leakage from the joint as much as possible.
【０００３】この目的のため、図３（ａ）（ｂ）のよう
なピストンリング２ａの合口部４の形状が提案されてい
る。この合口部４は、ピストンリング２ａの両端部を互
いに相補形状をなす段付形にしたものであって、図４
（ａ）のようにシリンダ５内のピストン７の外周に装着
された状態では、図４（ｂ）（ｃ）のようにこの段付き
端部が相互に嵌め合わされて合口部４の流体漏れ通路を
階段状に屈曲させることにより流体漏れ量を低減させて
いる。For this purpose, the shape of the abutment portion 4 of the piston ring 2a as shown in FIGS. 3 (a) and 3 (b) has been proposed. The abutment portion 4 is formed by forming both ends of the piston ring 2a into a stepped shape which is complementary to each other.
When the piston 7 is mounted on the outer periphery of the piston 7 in the cylinder 5 as shown in FIG. 4A, the stepped ends are fitted to each other as shown in FIGS. The amount of fluid leakage is reduced by bending stepwise.
【０００４】[0004]
【発明が解決しようとする課題】しかし、図３（ａ）
（ｂ）のような段付形は非常に複雑であり、その機械加
工が多工程となって非常にコストが嵩む。すなわち、図
３（ａ）（ｂ）の形状を加工するには、ピストンリング
２ａの一端部でピストンリング２ａの中間高さ位置に棚
平面６を形成し、この棚平面６から垂直に立った曲面壁
８を形成し、他端部ではピストンリング２ａの中間高さ
に位置する天井平面１０を形成し、この天井平面１０の
先端側からピストンリング２ａ上面１２へ垂直に伸びる
曲面壁１４を形成するのである。特に曲面壁８と１４及
び棚平面６と天井平面１０とは、できるだけ広い面積で
互いに密着することが流体漏れを少なくする上で非常に
重要であるから、その加工には高精度が要求されてい
た。However, FIG. 3 (a)
The stepped type as shown in (b) is very complicated, and its machining requires many steps, resulting in a very high cost. That is, in order to machine the shapes shown in FIGS. 3A and 3B, a shelf plane 6 is formed at an intermediate height position of the piston ring 2a at one end of the piston ring 2a, and the shelf plane 6 stands vertically from the shelf plane 6. A curved wall 8 is formed, and at the other end, a ceiling plane 10 located at the intermediate height of the piston ring 2a is formed, and a curved wall 14 extending vertically from the tip side of this ceiling plane 10 to the piston ring 2a upper surface 12 is formed. To do. In particular, it is very important that the curved walls 8 and 14 and the shelf plane 6 and the ceiling plane 10 are in close contact with each other over a wide area as much as possible in order to reduce fluid leakage. It was
【０００５】本発明の目的は、合口部４の流体漏れを殆
どなくしつつ合口部４形状を単純化し、もってピストン
リング２ａの加工コストを可及的に低減することにあ
る。It is an object of the present invention to simplify the shape of the abutment portion 4 while substantially eliminating fluid leakage at the abutment portion 4, thereby reducing the processing cost of the piston ring 2a as much as possible.
【０００６】[0006]
【課題を解決するための手段】本発明は前記課題を解決
するため、実質的な矩形断面を有するピストンリングの
合口部を形成するピストンリングの一端部に、ピストン
リングの矩形断面の実質的な対角線を含む内向斜面を有
し断面三角形状をなす第１挿入片部を所定長さで形成す
ると共に、前記第１挿入片部の半径方向内方に隣接して
断面三角形状の空所をなす第１受入部を形成し、合口部
を形成するピストンリングの他端部に、ピストンリング
の矩形断面の実質的な対角線を含み前記内向斜面と平行
な外向斜面を有し断面三角形状をなす第２挿入片部を所
定長さで形成すると共に、前記第２挿入片部の半径方向
外方に隣接して断面三角形状の空所をなす第２受入部を
形成し、ピストンリング装着状態において前記第１挿入
片部を第２受入部に挿入すると共に、前記第２挿入片部
を第１受入部に挿入し、前記内向斜面と外向斜面を密着
させるようにした。In order to solve the above-mentioned problems, the present invention has a substantially rectangular cross section of a piston ring at one end of the piston ring forming an abutment part of the piston ring having a substantially rectangular cross section. A first insertion piece portion having a triangular cross-section and having an inward slope including a diagonal line is formed with a predetermined length, and a space having a triangular cross-section is formed adjacent to the inside of the first insertion piece portion in the radial direction. A first cross-section having a triangular cross-section having an outward slant surface parallel to the inward slant surface that includes a substantially diagonal line of a rectangular cross section of the piston ring at the other end portion of the piston ring that forms the first receiving portion and forms the abutment portion; The second insertion piece portion is formed with a predetermined length, and a second receiving portion is formed adjacent to the outer side in the radial direction of the second insertion piece portion and has a space having a triangular cross section. 1st insertion piece part to 2nd receiving part It is inserted, and inserting the second insertion piece portion into the first receiving portion and so as to contact the inward slope and outward slope.
【０００７】本発明のピストンリングは、いわば従来の
ピストンリング２ａの棚平面６と曲面壁８を内向斜面に
置き換え、天井平面１０と曲面壁１４を外向斜面に置き
換えたものとして理解される。The piston ring of the present invention is understood to be one in which the shelf plane 6 and the curved wall 8 of the conventional piston ring 2a are replaced with an inward slope, and the ceiling plane 10 and the curved wall 14 are replaced with an outward slope.
【０００８】なお、本願明細書において前記「実質的な
矩形」の用語は、厳密な意味での矩形断面の他に、全体
として見て矩形に近いといえる異形断面をも包含する意
味で使用している。また「実質的な対角線」の用語は、
厳密な意味での対角線の他に、ピストンリングの矩形断
面の対向する角部の近傍を連結する実質的な意味での対
角線をも包含する意味で使用している。従って、ピスト
ンリングの角部から少しずれた位置を互いに連結する直
線もここでは「対角線」に含めて考えるものとする。In the present specification, the term "substantially rectangular" is used to include not only a rectangular cross section in a strict sense, but also a modified cross section which can be said to be almost rectangular as a whole. ing. The term "substantially diagonal" is
In addition to the diagonal line in the strict sense, the term also includes the diagonal line in the substantial sense that connects the vicinity of the opposite corners of the rectangular cross section of the piston ring. Therefore, the straight line connecting the positions slightly displaced from the corners of the piston ring to each other is also included in the “diagonal line” here.
【０００９】[0009]
【発明の実施の形態】以下に本発明の一実施形態を図１
に基づいて説明する。本発明のピストンリング２はコン
プレッサや真空ポンプの他、原理的には内燃機関にも適
用可能であるが、ここではコンプレッサ用として説明す
る。ピストンリング２は耐熱性及び潤滑性の見地からフ
ッ素系樹脂で構成され、このフッ素系樹脂には潤滑特性
及び耐久性を向上させるために粉末カーボンを混入させ
ている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
It will be described based on. The piston ring 2 of the present invention can be applied to an internal combustion engine in principle in addition to a compressor and a vacuum pump, but it will be described here for a compressor. The piston ring 2 is made of a fluororesin from the viewpoint of heat resistance and lubricity, and powder carbon is mixed in the fluororesin to improve the lubrication characteristics and durability.
【００１０】ピストンリング２の合口部４を形成する両
端部は、断面三角形状の挿入片部２０，２２と、この挿
入片部２０，２２に半径方向で隣接する空所である受入
部２４，２６で構成される。詳しくは、ピストンリング
２は断面矩形をなし、合口部４を形成する両端部が断面
矩形のほぼ対角線方向に斜めに切除され、一端部で内向
斜面２８が形成され、他端部で外向斜面３０が形成され
ている。内向斜面２８を有する突出部分が第１挿入片部
２０であり、外向斜面３０を有する突出部分が第２挿入
片部２２である。これら挿入片部２０，２２はピストン
リング２の円周方向に沿って所定長さで延在している。
内向斜面２８の半径方向内方に隣接する部分（ピストン
リング２の両端の切除された部分）に、断面三角形状の
第１受入部２４が形成される。同様に、外向斜面３０の
半径方向外方に隣接する部分に断面三角形状の第２受入
部２６が形成される。両受入部２４，２６の最奥部は、
三角状垂直壁３２，３４となっている。Both end portions forming the abutment portion 4 of the piston ring 2 are insertion piece portions 20 and 22 having a triangular cross section and a receiving portion 24 which is a space adjacent to the insertion piece portions 20 and 22 in the radial direction. 26. Specifically, the piston ring 2 has a rectangular cross section, and both ends forming the abutment portion 4 are obliquely cut in a substantially diagonal direction of the rectangular cross section, an inward slope 28 is formed at one end, and an outward slope 30 is formed at the other end. Are formed. The protruding portion having the inwardly inclined surface 28 is the first insertion piece portion 20, and the protruding portion having the outwardly inclined surface 30 is the second insertion piece portion 22. These insertion piece portions 20 and 22 extend along the circumferential direction of the piston ring 2 with a predetermined length.
A first receiving portion 24 having a triangular cross-section is formed at a portion adjacent to the inner side of the inwardly inclined surface 28 in the radial direction (a portion where both ends of the piston ring 2 are cut off). Similarly, a second receiving portion 26 having a triangular cross-section is formed in a portion adjacent to the outer side of the outward slope 30 in the radial direction. The innermost parts of both receiving parts 24 and 26 are
The triangular vertical walls 32 and 34 are formed.
【００１１】内向斜面２８と外向斜面３０の半径方向外
方側端縁Ｅ１は、厳密にはピストンリング２の矩形断面
の角部と一致せず、図１（ｄ）のように角部から少し下
のピストンリング２の外周面に露出し、端縁Ｅの上方に
シリンダ５の内周面と摺接する部分が残っているのが望
ましい。もしも端縁Ｅ１の上方にシリンダ５の内周面と
摺接する部分が残っていないと、端縁Ｅ１を通して内向
斜面２８と外向斜面３０の間に入り込むエア量が増える
おそれがあるからである。Strictly speaking, the radially outward end edges E1 of the inwardly inclined surface 28 and the outwardly inclined surface 30 do not coincide with the corners of the rectangular cross section of the piston ring 2, and as shown in FIG. It is desirable that a portion that is exposed on the outer peripheral surface of the lower piston ring 2 and that is in sliding contact with the inner peripheral surface of the cylinder 5 remains above the end edge E. This is because if there is no portion above the end edge E1 that is in sliding contact with the inner peripheral surface of the cylinder 5, the amount of air entering between the inward slope 28 and the outward slope 30 through the edge E1 may increase.
【００１２】また、内向斜面２８と外向斜面３０の半径
方向内方側端縁Ｅ２は、厳密にはピストンリング２の矩
形断面の角部とは一致せず、角部から少し半径方向外方
のピストンリング２の下端面に露出し、第２挿入片部３
０の下端部がリング溝４０の下面に当接する部分が残っ
ているのが望ましい。もし第２挿入片部３０の下端部が
リング溝４０の下面に当接していないと、第１挿入片部
２０の先端と三角状垂直壁３４との間の隙間３８が半径
方向にピストンリング２の内外を貫通することになり、
リング溝４０と隙間３８を通して若干のエア漏れが起こ
るからである。Further, strictly speaking, the radially inner edge E2 of the inwardly inclined surface 28 and the outwardly inclined surface 30 does not coincide with the corner of the rectangular cross section of the piston ring 2, but slightly outward in the radial direction from the corner. It is exposed at the lower end surface of the piston ring 2, and the second insertion piece portion 3
It is desirable that a portion where the lower end portion of 0 abuts on the lower surface of the ring groove 40 remains. If the lower end portion of the second insertion piece portion 30 does not abut the lower surface of the ring groove 40, the gap 38 between the tip of the first insertion piece portion 20 and the triangular vertical wall 34 is formed in the radial direction of the piston ring 2. Will penetrate the inside and outside of
This is because some air leakage occurs through the ring groove 40 and the gap 38.
【００１３】以上のように構成されたピストンリング２
を、図１（ｄ）のようにピストン７外周のリング溝４０
に装着しピストン７をシリンダ５内に挿入すると、図１
（ｂ）（ｃ）のように、第１挿入片部２０が第２受入部
２６に挿入され、第２挿入片部２２が第１受入部２４に
挿入された状態となる。この状態では内向斜面２８と外
向斜面３０が互いに密着される。ただし、第１及び第２
挿入片部２０，２２の先端と三角状垂直壁３２，３４と
の間には、ピストンリング２の熱膨張を見込んで若干の
隙間３６，３８を残しておくのがよい。Piston ring 2 constructed as described above
The ring groove 40 on the outer circumference of the piston 7 as shown in FIG.
1 and the piston 7 is inserted into the cylinder 5,
As in (b) and (c), the first insertion piece portion 20 is inserted into the second receiving portion 26, and the second insertion piece portion 22 is inserted into the first receiving portion 24. In this state, the inward slope 28 and the outward slope 30 are in close contact with each other. However, the first and second
It is preferable to leave some gaps 36, 38 between the tips of the insertion piece portions 20, 22 and the triangular vertical walls 32, 34 in consideration of thermal expansion of the piston ring 2.
【００１４】ピストンリング２を製作するには、内向斜
面２８と外向斜面３０を単に切除するだけでよい。これ
ら斜面２８，３０は理想的にはピストンリング２の曲率
に対応した円弧面（正確には円錐面）がよいが、円弧面
にすると従来ほどではないが加工コストが嵩むから、斜
面２８，３０は円弧面ではなく単なる平面にすることも
可能である。すなわち、用途によっては挿入片部２０，
２２の長さが比較的短くても流体漏れを防止する上で十
分であり、ピストンリング２の外周面の摩滅による半径
方向の拡張やピストンリング２の円周方向の熱膨張を考
慮して斜面を円弧面にする必要性がない場合もある。In order to manufacture the piston ring 2, the inward slope 28 and the outward slope 30 need only be cut off. These slopes 28, 30 are ideally arcuate surfaces (correctly conical surfaces) corresponding to the curvature of the piston ring 2, but if they are arcuate surfaces, the machining cost will increase, although this is not as high as the conventional one. Can also be a flat surface instead of an arc surface. That is, depending on the application, the insertion piece 20,
Even if the length of 22 is relatively short, it is sufficient to prevent fluid leakage, and in consideration of radial expansion due to abrasion of the outer peripheral surface of the piston ring 2 and thermal expansion in the circumferential direction of the piston ring 2, the sloped surface is considered. In some cases, there is no need to make a circular arc surface.
【００１５】以上のように構成されたピストンリング２
は、例えばコンプレッサのピストン７に装着した場合、
ごく微量ではあるが、可能性として流体漏れの経路は図
１（ｃ）で矢印で示す方向になると考えられる。すなわ
ち、シリンダ５内圧力室のエアは、最初に第２挿入片部
２２の先端と三角状垂直壁３２との間に入り、ここから
内向斜面２８と外向斜面３０との間を通り、最後に第１
挿入片部２０の先端と三角状垂直壁３４との間の隙間３
８を通って下方に流出するのである。しかし、内向斜面
２８と外向斜面３０は互いに密着しているから、実際に
ピストンリング２の下方に流出するエア量はごく微量と
なる。従って、合口部４の形状は従来よりも格段に単純
で加工が簡単であるにも拘らず、エア漏れは殆どゼロに
抑制することができる。Piston ring 2 constructed as described above
Is attached to the piston 7 of the compressor, for example,
Although it is a very small amount, the route of fluid leakage is considered to be in the direction indicated by the arrow in FIG. 1 (c). That is, the air in the pressure chamber in the cylinder 5 first enters between the tip of the second insertion piece portion 22 and the triangular vertical wall 32, passes from here between the inward slope 28 and the outward slope 30, and finally reaches the end. First
Gap 3 between the tip of the insertion piece 20 and the triangular vertical wall 34
It flows out through 8 downwards. However, since the inward slope 28 and the outward slope 30 are in close contact with each other, the amount of air actually flowing out below the piston ring 2 is extremely small. Therefore, although the shape of the abutment portion 4 is remarkably simpler and easier to process than before, air leakage can be suppressed to almost zero.
【００１６】また本発明のピストンリング２は、コンプ
レッサのピストン７に装着する場合、内向斜面２８を圧
力室に臨んで配設することにより、圧力室の内圧が内向
斜面２８に作用してピストンリング２を半径方向外方に
拡張させるから、ピストンリング２外周面とシリンダ５
内周面との密着度が向上し、ピストンリング２外周面か
らのエア漏れも低減可能である。この点、従来のピスト
ンリング２には圧力室の圧力を積極的に利用してピスト
ンリング２を拡張する構成はなく、ピストンリング２と
シリンダ内周面との圧着は実質的にピストンリング２自
体の弾性拡張力に依存していた。従って、樹脂製ピスト
ンリング２のようにあまり大きな弾性定数を稼げないピ
ストンリングにとって、圧力室の圧力によるピストンリ
ング２の拡張はエア漏れ低減のための有効な手段となり
得る。Further, when the piston ring 2 of the present invention is mounted on the piston 7 of the compressor, by disposing the inwardly inclined surface 28 so as to face the pressure chamber, the internal pressure of the pressure chamber acts on the inwardly inclined surface 28 to cause the piston ring 2 to move. 2 is expanded outward in the radial direction, the outer peripheral surface of the piston ring 2 and the cylinder 5
The degree of adhesion with the inner peripheral surface is improved, and air leakage from the outer peripheral surface of the piston ring 2 can be reduced. In this respect, the conventional piston ring 2 does not have a structure in which the piston ring 2 is expanded by positively utilizing the pressure of the pressure chamber, and the piston ring 2 and the cylinder inner peripheral surface are substantially pressure-bonded to each other. Was dependent on the elastic expansion force of. Therefore, for a piston ring such as the resin piston ring 2 that cannot obtain a large elastic constant, expansion of the piston ring 2 due to the pressure of the pressure chamber can be an effective means for reducing air leakage.
【００１７】同様の考え方で、本発明のピストンリング
２を真空ポンプのように大気よりも低圧の吸込室を有す
るシリンダのピストン外周に装着する場合では、今度は
外向斜面３０を吸込室に臨んで配設する（すなわち内向
斜面を大気側とする）とよい（図示せず。）。これによ
り大気圧が内向斜面２８に作用してピストンリング２を
拡張させ、ピストンリング２外周面とシリンダ内周面と
の圧着力を増大させ、真空漏れを低減させる。When the piston ring 2 of the present invention is attached to the outer circumference of the piston of a cylinder having a suction chamber whose pressure is lower than atmospheric pressure, like the vacuum pump, the outward slope 30 faces the suction chamber. It is preferable to dispose (that is, the inward slope is the atmosphere side) (not shown). As a result, atmospheric pressure acts on the inwardly inclined surface 28 to expand the piston ring 2, increasing the pressure-bonding force between the outer peripheral surface of the piston ring 2 and the inner peripheral surface of the cylinder, and reducing vacuum leakage.
【００１８】また本発明のピストンリング２は、樹脂製
の他、各種金属を素材としたものでもよいし、用途とし
ては、コンプレッサや真空ポンプの他に、内燃機関など
のピストンリング２にも適用可能である。The piston ring 2 of the present invention may be made of various metals other than resin, and may be applied to the piston ring 2 of internal combustion engines as well as compressors and vacuum pumps. It is possible.
【００１９】本発明のピストンリング２は、図１（ｄ）
のようにほぼ完全な矩形断面の他、実質的に矩形断面を
なすピストンリングにも適用可能である。図２は全体と
して見た場合に実質的に矩形断面といえる具体例を示し
たもので、図２（ａ）はＬ型に近い矩形断面を有するピ
ストンリング２−１、図２（ｂ）はコ字型に近い矩形断
面を有するピストンリング２−２、図２（ｃ）は楔形に
近い矩形断面を有するピストンリング２−３である。こ
れら各例においても、流体漏れをさらに少なくするため
に内向斜面２８と外向斜面３０はピストンリング２の外
周面と一端面にそれぞれ露出させるのがよい。The piston ring 2 of the present invention is shown in FIG.
In addition to the substantially complete rectangular cross section as described above, the present invention can be applied to a piston ring having a substantially rectangular cross section. FIG. 2 shows a specific example that can be said to have a substantially rectangular cross section when viewed as a whole. FIG. 2A shows a piston ring 2-1 having a rectangular cross section close to an L shape, and FIG. A piston ring 2-2 having a rectangular cross section close to a U-shape, and FIG. 2C shows a piston ring 2-3 having a rectangular cross section close to a wedge. In each of these examples, the inward slope 28 and the outward slope 30 are preferably exposed at the outer peripheral surface and the one end surface of the piston ring 2 in order to further reduce fluid leakage.
【００２０】[0020]
【発明の効果】本発明は前述のごとく、合口部を形成す
るピストンリングの端部を内向斜面と外向斜面の合わせ
構造としたので、合口部の加工が容易で加工コストを低
減できる。また内向斜面と外向斜面は互いに密着してい
るので流体漏れは殆どなく、高いシール性能を発揮でき
る。As described above, according to the present invention, the end portion of the piston ring forming the abutment portion has a structure in which the inward slope and the outward slope are combined, so that the abutment portion can be easily processed and the processing cost can be reduced. Further, since the inward slope and the outward slope are in close contact with each other, there is almost no fluid leakage, and high sealing performance can be exhibited.
【図１】（ａ）は本発明のピストンリングの斜視図、
（ｂ）はピストン装着時のピストンリングの合口部の平
面図、（ｃ）は同側面図、（ｄ）はピストン装着時のピ
ストンリングの断面図。1A is a perspective view of a piston ring of the present invention, FIG.
(B) is a plan view of the abutment portion of the piston ring when the piston is mounted, (c) is a side view thereof, and (d) is a cross-sectional view of the piston ring when the piston is mounted.
【図２】（ａ）、（ｂ）及び（ｃ）は、それぞれ本発明
のピストンリングの断面形状の変形例を示す断面図。2 (a), (b) and (c) are sectional views showing modified examples of the sectional shape of the piston ring of the present invention.
【図３】（ａ）は従来のピストンリングの平面図、
（ｂ）は同リングの合口部の斜視図。FIG. 3A is a plan view of a conventional piston ring,
(B) is a perspective view of the abutment portion of the ring.
【図４】（ａ）はコンプレッサのシリンダの概略縦断面
図、（ｂ）はシリンダ内のピストンリングの部分平面
図、（ｃ）はピストンリングの合口部の側面図。4A is a schematic vertical sectional view of a cylinder of a compressor, FIG. 4B is a partial plan view of a piston ring in the cylinder, and FIG. 4C is a side view of an abutment portion of the piston ring.
２ ピストンリング ４ 合口部 ５ シリンダ ７ ピストン ２０ 第１挿入片部 ２２ 第２挿入片部 ２４ 第１受入部 ２６ 第２受入部 ２８ 内向斜面 ３０ 外向斜面 32,34 三角状垂直壁 36,38 隙間 ４０ リング溝 2 Piston ring 4 Abutment part 5 Cylinder 7 Piston 20 1st insertion piece part 22 2nd insertion piece part 24 1st receiving part 26 2nd receiving part 28 Inward slope 30 Outward slope 32,34 Triangular vertical wall 36,38 Gap 40 Ring groove
Claims (4)
グの合口部を形成するピストンリングの一端部に、ピス
トンリングの矩形断面の実質的な対角線を含む内向斜面
を有し断面三角形状をなす第１挿入片部を所定長さで形
成すると共に、前記第１挿入片部の半径方向内方に隣接
して断面三角形状の空所をなす第１受入部を形成し、 合口部を形成するピストンリングの他端部に、ピストン
リングの矩形断面の実質的な対角線を含み前記内向斜面
と平行な外向斜面を有し断面三角形状をなす第２挿入片
部を所定長さで形成すると共に、前記第２挿入片部の半
径方向外方に隣接して断面三角形状の空所をなす第２受
入部を形成し、 ピストンリング装着状態において前記第１挿入片部を第
２受入部に挿入すると共に、前記第２挿入片部を第１受
入部に挿入し、前記内向斜面と外向斜面を密着させるよ
うにしたピストンリング。1. A triangular cross-section having an inwardly inclined surface including a substantially diagonal line of a rectangular cross section of the piston ring at one end of the piston ring forming an abutment portion of the piston ring having a substantially rectangular cross section. (1) A piston that forms an insertion portion by forming a first insertion piece portion with a predetermined length and forming a first receiving portion that is a space having a triangular cross section adjacent to the first insertion piece portion radially inwardly. At the other end of the ring, a second insertion piece portion having a triangular cross-section having an outward slant surface including a substantially diagonal line of a rectangular cross section of the piston ring and parallel to the inward slant surface is formed with a predetermined length. A second receiving portion is formed adjacent to the outer side of the second inserting piece portion in the radial direction to form a hollow space having a triangular cross section, and the first inserting piece portion is inserted into the second receiving portion in a piston ring mounted state. , The second insertion piece portion is the first receiving portion Inserting a piston ring so as to contact the inward slope and outward slope.
端縁が、ピストンリングの角部から離間したピストンリ
ングの外周面に露出すると共に、前記内向斜面と外向斜
面の半径方向内方側端縁が、ピストンリングの角部から
離間したピストンリングの一端面に露出していることを
特徴とする請求項１記載のピストンリング。2. The radially outward end edges of the inward slope and the outward slope are exposed at the outer peripheral surface of the piston ring separated from the corners of the piston ring, and the radially inward direction of the inward slope and the outward slope. The piston ring according to claim 1, wherein the side edge is exposed at one end surface of the piston ring separated from a corner portion of the piston ring.
臨んで前記内向斜面が形成された請求項１記載のピスト
ンリング。3. The piston ring according to claim 1, wherein the inward slope is formed so as to face the pressure chamber side in the cylinder of the compressor.
んで前記外向斜面が形成された請求項１記載のピストン
リング。4. The piston ring according to claim 1, wherein the outward slope is formed so as to face the suction chamber side in the cylinder of the vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32059895A JPH09159026A (en) | 1995-12-08 | 1995-12-08 | Piston ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32059895A JPH09159026A (en) | 1995-12-08 | 1995-12-08 | Piston ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09159026A true JPH09159026A (en) | 1997-06-17 |
Family
ID=18123211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32059895A Pending JPH09159026A (en) | 1995-12-08 | 1995-12-08 | Piston ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09159026A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008017195A1 (en) * | 2006-07-25 | 2008-02-14 | Yingjie Yang | A piston ring without end clearance and a piston with said ring |
| JP2012042005A (en) * | 2010-08-20 | 2012-03-01 | Denso Corp | Seal ring and method of manufacturing the same |
| CN102844596A (en) * | 2011-04-20 | 2012-12-26 | 丰田自动车株式会社 | Seal structure |
| JP2017003052A (en) * | 2015-06-12 | 2017-01-05 | 株式会社リケン | piston ring |
| CN107110360A (en) * | 2014-12-02 | 2017-08-29 | 三菱电线工业株式会社 | Sealing ring |
| EP3211228A1 (en) * | 2016-02-26 | 2017-08-30 | Mitsubishi Heavy Industries, Ltd. | Hydraulic machine and wind turbine power generating apparatus |
| JP2018028332A (en) * | 2016-08-15 | 2018-02-22 | 株式会社リケン | piston ring |
| JP2019100379A (en) * | 2017-11-29 | 2019-06-24 | 株式会社リケン | Piston ring set |
-
1995
- 1995-12-08 JP JP32059895A patent/JPH09159026A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008017195A1 (en) * | 2006-07-25 | 2008-02-14 | Yingjie Yang | A piston ring without end clearance and a piston with said ring |
| JP2012042005A (en) * | 2010-08-20 | 2012-03-01 | Denso Corp | Seal ring and method of manufacturing the same |
| CN102844596A (en) * | 2011-04-20 | 2012-12-26 | 丰田自动车株式会社 | Seal structure |
| CN102844596B (en) * | 2011-04-20 | 2014-09-03 | 丰田自动车株式会社 | Seal structure |
| US8876116B2 (en) | 2011-04-20 | 2014-11-04 | Toyota Jidosha Kabushiki Kaisha | Sealing structure |
| CN107110360A (en) * | 2014-12-02 | 2017-08-29 | 三菱电线工业株式会社 | Sealing ring |
| CN107110360B (en) * | 2014-12-02 | 2019-11-19 | 三菱电线工业株式会社 | Sealing ring |
| JP2017003052A (en) * | 2015-06-12 | 2017-01-05 | 株式会社リケン | piston ring |
| EP3211228A1 (en) * | 2016-02-26 | 2017-08-30 | Mitsubishi Heavy Industries, Ltd. | Hydraulic machine and wind turbine power generating apparatus |
| JP2017150442A (en) * | 2016-02-26 | 2017-08-31 | 三菱重工業株式会社 | Hydraulic machine and wind power generator |
| JP2018028332A (en) * | 2016-08-15 | 2018-02-22 | 株式会社リケン | piston ring |
| WO2018034112A1 (en) * | 2016-08-15 | 2018-02-22 | 株式会社リケン | Piston ring |
| EP3499095A4 (en) * | 2016-08-15 | 2020-04-22 | Kabushiki Kaisha Riken | Piston ring |
| JP2019100379A (en) * | 2017-11-29 | 2019-06-24 | 株式会社リケン | Piston ring set |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19990223 |