JPS5823256A - Piston ring - Google Patents

Piston ring

Info

Publication number
JPS5823256A
JPS5823256A JP12284981A JP12284981A JPS5823256A JP S5823256 A JPS5823256 A JP S5823256A JP 12284981 A JP12284981 A JP 12284981A JP 12284981 A JP12284981 A JP 12284981A JP S5823256 A JPS5823256 A JP S5823256A
Authority
JP
Japan
Prior art keywords
piston ring
porous
groove
polyimide
polyamide
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
Application number
JP12284981A
Other languages
Japanese (ja)
Inventor
Yasuhiro Tsuchiya
泰広 土屋
Hitoshi Ozawa
仁 小沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP12284981A priority Critical patent/JPS5823256A/en
Publication of JPS5823256A publication Critical patent/JPS5823256A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J9/00Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/26Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials

Abstract

PURPOSE:To improve scuffing resistance, by circumferentially extensibly providing a groove to the sliding surface of a piston ring, filling a porous plated layer to said groove and adhesively infiltrating a synthetic resin layer of polyimide or polyamide to a porous part of said plated layer. CONSTITUTION:A circumferentially extended groove 2 is formed to the sliding surface of a piston ring 1, and its corner part 3 is smoothly formed to curved shape. A porous chrome plated layer 4 of porosity factor 0.2-0.5 is formed to said groove 2, and a compound material synthetic resin 5, consisting of polyimide or polyamide contained with a carbon particle of diameter at least 1mu- 150mu, is adhesively infiltrated by the method of baking and the like under pressure to a porous part in the sliding surface. Porous chrome plating is applied to the interior of the groove, and exfoliation of the plated layer can be prevented, while the polyimide or polyamide resin, contained with graphite, is filled in the porous part, and scuffing resistance can be held for a long period.

Description

【発明の詳細な説明】 本発明は、ピストンリング(二関し、特にアルミ合金製
ライナーとアルミ合金製ピストンで(河成されている内
燃機関に便用する、低温及び高温時の耐スカツフ性を向
上させたピストンリングの構造に関Tるものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piston ring (particularly an aluminum alloy liner and an aluminum alloy piston) that improves scuff resistance at low and high temperatures, which is conveniently used in internal combustion engines. This relates to an improved piston ring structure.

スカッフィング(Scuffing )は、低温始動時
又は高温条H二下で、シリンダーライナーの一時的な油
膜切れによるメタルコンタクトによす発生すると考えら
れている。耐スカツフ性向上のため(−は、耐摩耗性の
向上、保油性の向上、耐乾式摩擦性の向上等の対策があ
る。耐摩耗性の向上のための手段には、クロムメッキや
モリブデンメッキがあるが、クロムメッキは油とのぬれ
性が悪く、モリブデンメッキはモリブデンが硬丁ぎて相
手材が摩耗してしまうという欠点がある。保油性の向上
対策として、クロムメッキの表面に気孔を設けるポーラ
スクロムメッキがあるが、良い結果が得られt(かった
。乾式摩擦性の向上対策としては、従来クロムメッキ上
に錫メッキやテフロンコーティング行なわれており、初
期t(じみの点ではかなりの効果があるが、長時間運転
時には、錫メッキは早期に摩耗消滅し、テフロンではコ
ーティング層自体が剥離してしまう等の欠点がある。
Scuffing is thought to occur during cold start-up or under high temperature conditions due to metal contact due to temporary lack of oil film on the cylinder liner. To improve scuff resistance (- means improved wear resistance, improved oil retention, improved dry friction resistance, etc.) Measures to improve wear resistance include chrome plating and molybdenum plating. However, chrome plating has poor wettability with oil, and molybdenum plating has the disadvantage that molybdenum is too hard and the mating material wears out.As a measure to improve oil retention, pores are created on the surface of chrome plating. There is porous chrome plating, but good results were not obtained.As a measure to improve dry friction, conventionally tin plating or Teflon coating was applied on chrome plating, but the initial t(bleeding) was considerably reduced. However, during long-term operation, tin plating wears out quickly, and Teflon has drawbacks such as the coating layer itself peeling off.

本発明の目的は、上述の従来技術の欠点を除去し、アル
ミ合金製シリンダーライナーを有する内燃医関に使用さ
れる、耐スカツフ性の高い然もjk期間C−わたり耐ス
カツフ性を保持しうるピストンリングをtI供すること
である。
The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a cylinder liner made of aluminum alloy used in an internal combustion engine, which has high scuff resistance and can maintain scuff resistance over a period of time C. It is to subject the piston ring to tI.

本発明は、ピストンリングの摺動面にポリイミド系又は
ポリアミド系のグラファイト含有複合化樹脂層を設けて
耐スカツフ性を向上させたピストンリング(二より、そ
の目的を達成する。
The present invention provides a piston ring with improved scuff resistance by providing a polyimide-based or polyamide-based graphite-containing composite resin layer on the sliding surface of the piston ring (Secondly, the object is achieved).

本発明の実施77.9様を図面を参照して説明する。The embodiment 77.9 of the present invention will be described with reference to the drawings.

第1図は、本発明の第1実施例を示すもので、ピストン
リングの一部断面図である。Jはピストンリングを指し
、このピストンリング1. t−v *)、j鉄製であ
り、その外周即ちライナー摺動面側に、ピストンリング
の厚みBに対して0.5〜0.8の範9Hの幅を有し且
つピストンリングの幅Ti二対してOD5〜02の深さ
を有する溝2を円周力量に形成する。溝2の隅部3は滑
らかな湾曲状とする。
FIG. 1 shows a first embodiment of the present invention, and is a partial sectional view of a piston ring. J refers to the piston ring, and this piston ring 1. tv *), j It is made of iron and has a width in the range 9H of 0.5 to 0.8 with respect to the piston ring thickness B on its outer periphery, that is, on the liner sliding surface side, and the piston ring width Ti A groove 2 having a depth of OD5-02 is formed in the circumferential force. The corner portion 3 of the groove 2 has a smoothly curved shape.

この溝2を充填し且つ外側(1摺動面を形成するよう(
−1この?47メ2に気孔率0.2〜0.5のポーラス
クロムメッキ層4を形成する。ボーラスクロムメ・ツキ
層の」ρ動面(二あるポーラスt41≦に少くとも、1
μ〜150μ径のカーボン粒子を含んだポリイミド又は
ポリアミドからなる複合材合成樹脂5を加圧焼付等の適
宜手段により浸透付着させ、所定の形状に加工する。
Fill this groove 2 and form a sliding surface on the outside (1).
-1 This? A porous chromium plating layer 4 having a porosity of 0.2 to 0.5 is formed on the 47th mesh 2. The ρ dynamic surface of the bolus chromium layer (at least 1 for the two porous t41≦)
A composite synthetic resin 5 made of polyimide or polyamide containing carbon particles having a diameter of .mu. to 150 .mu. is infiltrated and adhered by appropriate means such as pressure baking and processed into a predetermined shape.

第2図は、本発明の第2実施例を示す。鋳鉄のピストン
リング1に溝2を形成することは前クー施例と同様であ
る。ポーラスクロメツキ4の」−には、グラファイト含
有のポリイミド又はポリアミド樹脂5′を、メッキ層の
ポーラス部を含んでポーラス部以外の表面にも完全にコ
ーティングし、)すf定形状に加工する。
FIG. 2 shows a second embodiment of the invention. Forming the grooves 2 in the cast iron piston ring 1 is similar to the previous embodiment. In the porous chrome plating 4, the surface of the plated layer including the porous portions and other surfaces is completely coated with graphite-containing polyimide or polyamide resin 5', and processed into a regular shape.

本発明は上セ1sのように、スピストンリングに形成し
た溝の内部にポーラスクロムメッキが施されているので
、運転時の上下動によるメッキ層の剥離を防止下ること
ができる。また、メッキ層のポーラス部【1少くとも、
グラファイト含有のポリイミド又はポリアミド樹脂が充
填されているので、第1図の例では、クロムメッキによ
り耐摩耗性を保持できると同時に、複合材樹脂が自己潤
滑性を有するため乾式摩擦下でも潤滑性が確保され、耐
スカツフ性が向上し、リングの異常摩耗も防止できる。
In the present invention, like the upper case 1s, porous chrome plating is applied to the inside of the groove formed in the piston ring, so it is possible to prevent the plating layer from peeling off due to vertical movement during operation. In addition, the porous part of the plating layer [1 at least
Since it is filled with graphite-containing polyimide or polyamide resin, in the example shown in Figure 1, the chrome plating can maintain wear resistance, and at the same time, the composite resin has self-lubricating properties, so it maintains lubricity even under dry friction. This improves scuff resistance and prevents abnormal wear of the ring.

第2図の実施例では、特に初期rcじみ性の向上と初期
スカッフの防止の効果が大きい。又、ポーラス部の内部
(−充填された合成樹脂と、括“動面全体にわたり被覆
された合成樹脂とが、一体向(二結合し7ているので、
ピストンリングの摺動時にこれらの樹脂が剥離すること
もない。本発明C二より、耐スカリ、摩擦係数が大幅に
低下し、摩擦損失を低下させ、燃料費も節約される。初
期なじみ性の改善により、初期異常摩耗が全くない。
The embodiment shown in FIG. 2 is particularly effective in improving initial rc smearing properties and preventing initial scuffing. In addition, the interior of the porous portion (-) and the synthetic resin that is coated over the entire moving surface are oriented in one direction (two-bonded), so
These resins will not peel off when the piston ring slides. According to the present invention C2, the scorch resistance and friction coefficient are significantly reduced, the friction loss is reduced, and fuel costs are also saved. Due to improved initial conformability, there is no initial abnormal wear.

第3図は、従来のクロムメッキのピストンリングと本発
明のピストンリングの耐焼付性を比較するために、21
ガソリンエンジンでボアを無潤滑状態(ニしたまま、5
200r、p、mの回転数で焼付きまでの時間を夫々測
定し、その結果をグラフに示したものである。本発明の
ピストンリングは、従来品と比較して、3倍の耐焼付性
を示した。
Fig. 3 shows a comparison of the seizure resistance of the conventional chrome-plated piston ring and the piston ring of the present invention.
With a gasoline engine, the bore is left unlubricated.
The time until seizure was measured at rotational speeds of 200 r, p, and m, respectively, and the results are shown in a graph. The piston ring of the present invention exhibited three times the seizure resistance compared to conventional products.

表1は、従来のクロムメッキのピストンリン5− グど本発明のピストンリングの耐摩耗性の比較を示す表
で、」二連のエンジンと同種のエンジンる。本発明品は
、従来品と比較して、摩耗量は北であった。
Table 1 is a table showing a comparison of the wear resistance of a conventional chrome-plated piston ring and a piston ring of the present invention for two engines and the same type of engine. The amount of wear of the product of the present invention was less than that of the conventional product.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明のピストンリングの一実施態様を示す
一部拡大断面図、第2図は、他の実施態様な示す第1図
同様の断面図である。 第3因は、本発明のピストンリングと従来のピストンリ
ングの耐焼付性の比較試験の結果を示すグラフである。 J〜ピストンリング、 2〜ピストンリングの溝、 6− 4〜ポ一ラスクロムメツキ層、 5,5′〜グラフアイトを含有したポリイミド又はポリ
アミドの合成樹脂。 7−
FIG. 1 is a partially enlarged sectional view showing one embodiment of a piston ring of the present invention, and FIG. 2 is a sectional view similar to FIG. 1 showing another embodiment. The third factor is a graph showing the results of a comparative test of seizure resistance between the piston ring of the present invention and a conventional piston ring. J~Piston ring, 2~Piston ring groove, 6-4~Poly chrome plating layer, 5,5'~Synthetic resin of polyimide or polyamide containing graphite. 7-

Claims (1)

【特許請求の範囲】[Claims] ピストンリングの摺動面(−設けた円周方向に延びる溝
と、前記溝に充填するように設けたポーラスなメッキ層
と、少くとも前記メッキ層のポーラス部に浸透付着させ
た、カーボン粒子を含むか又は含まないポリイミド又は
ポリアミドの合成樹脂層とからなることを特徴とするピ
ストンリング。
The sliding surface of the piston ring (- a groove extending in the circumferential direction provided, a porous plating layer provided to fill the groove, and carbon particles infiltrated and attached to at least the porous portion of the plating layer) A piston ring comprising a synthetic resin layer of polyimide or polyamide, which may or may not contain polyimide or polyamide.
JP12284981A 1981-08-05 1981-08-05 Piston ring Pending JPS5823256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12284981A JPS5823256A (en) 1981-08-05 1981-08-05 Piston ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12284981A JPS5823256A (en) 1981-08-05 1981-08-05 Piston ring

Publications (1)

Publication Number Publication Date
JPS5823256A true JPS5823256A (en) 1983-02-10

Family

ID=14846152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12284981A Pending JPS5823256A (en) 1981-08-05 1981-08-05 Piston ring

Country Status (1)

Country Link
JP (1) JPS5823256A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258050A (en) * 1985-09-05 1987-03-13 Toyota Motor Corp Piston ring
JPS62298648A (en) * 1986-06-18 1987-12-25 Nippon Piston Ring Co Ltd Sliding member for internal combustion engine
JPH0280750U (en) * 1988-12-13 1990-06-21
US9476454B2 (en) 2008-12-30 2016-10-25 Federal-Mogul Wiesbaden Gmbh Sliding element
US9551419B2 (en) 2015-04-22 2017-01-24 Federal-Mogul Corporation Coated sliding element
JPWO2016103856A1 (en) * 2014-12-25 2017-06-08 日立オートモティブシステムズ株式会社 Piston for internal combustion engine, and method and apparatus for manufacturing the piston
JP2021196057A (en) * 2020-06-15 2021-12-27 エムエーエヌ・エナジー・ソリューションズ・フィリアル・アフ・エムエーエヌ・エナジー・ソリューションズ・エスイー・ティスクランド Piston ring used for ring pack in piston of cross head type large turbocharged two-stroke uniflow-scavenged internal combustion engine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258050A (en) * 1985-09-05 1987-03-13 Toyota Motor Corp Piston ring
JPH0554594B2 (en) * 1985-09-05 1993-08-12 Toyota Motor Co Ltd
JPS62298648A (en) * 1986-06-18 1987-12-25 Nippon Piston Ring Co Ltd Sliding member for internal combustion engine
JPH0280750U (en) * 1988-12-13 1990-06-21
US9476454B2 (en) 2008-12-30 2016-10-25 Federal-Mogul Wiesbaden Gmbh Sliding element
JPWO2016103856A1 (en) * 2014-12-25 2017-06-08 日立オートモティブシステムズ株式会社 Piston for internal combustion engine, and method and apparatus for manufacturing the piston
CN107110061A (en) * 2014-12-25 2017-08-29 日立汽车***株式会社 The manufacture method and manufacture device of piston for IC engine and the piston
US9551419B2 (en) 2015-04-22 2017-01-24 Federal-Mogul Corporation Coated sliding element
JP2021196057A (en) * 2020-06-15 2021-12-27 エムエーエヌ・エナジー・ソリューションズ・フィリアル・アフ・エムエーエヌ・エナジー・ソリューションズ・エスイー・ティスクランド Piston ring used for ring pack in piston of cross head type large turbocharged two-stroke uniflow-scavenged internal combustion engine

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