WO2011071049A1 - Segment de piston et dispositif à piston - Google Patents

Segment de piston et dispositif à piston Download PDF

Info

Publication number
WO2011071049A1
WO2011071049A1 PCT/JP2010/071931 JP2010071931W WO2011071049A1 WO 2011071049 A1 WO2011071049 A1 WO 2011071049A1 JP 2010071931 W JP2010071931 W JP 2010071931W WO 2011071049 A1 WO2011071049 A1 WO 2011071049A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
piston
piston ring
coating
hardness
Prior art date
Application number
PCT/JP2010/071931
Other languages
English (en)
Japanese (ja)
Inventor
隼一 佐々木
敬 小野
Original Assignee
株式会社リケン
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 株式会社リケン filed Critical 株式会社リケン
Priority to EP10835969.6A priority Critical patent/EP2511575B1/fr
Priority to JP2011545217A priority patent/JP5545774B2/ja
Priority to CN201080055179.0A priority patent/CN102648366B/zh
Priority to US13/514,509 priority patent/US9062769B2/en
Publication of WO2011071049A1 publication Critical patent/WO2011071049A1/fr

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M107/00—Lubricating compositions characterised by the base-material being a macromolecular compound
    • C10M107/40—Lubricating compositions characterised by the base-material being a macromolecular compound containing nitrogen
    • C10M107/42—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/061—Carbides; Hydrides; Nitrides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • 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
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/08—Constructional features providing for lubrication

Definitions

  • the present invention relates to a piston ring, and more particularly to a piston ring for an internal combustion engine.
  • ring groove surface The vicinity of the gasoline engine top ring reaches a high temperature of 200 ° C or higher due to fuel combustion.
  • the piston ring and the piston ring groove surface of the piston (hereinafter referred to as “ring groove surface”) are repeatedly collided by the combustion pressure at such a high temperature, and at the same time, the piston ring surface and the ring groove The surface slides in the circumferential direction.
  • Fig. 1 shows the result of measuring the roughness of the ring groove surface.
  • protrusions having a height of about 1 ⁇ m generated by lathe processing with a cutting tool are present at intervals of 0.2 mm.
  • an aluminum alloy is usually used as the piston material.
  • the aluminum-based material has low heat resistance, and when it exceeds 200 ° C., the hardness decreases. Under such a high temperature, the piston ring collides and slides to cause fatigue failure on the surface of the ring groove, the surface protrusions drop off, and a new surface of an active aluminum alloy appears on the surface of the ring groove.
  • the loss of the gas sealing function as one of the sealing performances causes a blow-by phenomenon in which high-pressure combustion gas flows out from the combustion chamber to the crank chamber, leading to a decrease in engine output.
  • the loss of the oil seal function causes an increase in oil consumption.
  • the ring adhesion is caused by the aluminum adhesion, the sealing performance between the piston ring upper and lower surfaces and the ring groove surface is impaired, and the amount of blow-by is increased.
  • Patent Document 1 describes a method in which an anodizing treatment (alumite treatment) is performed on the surface of a ring groove, and a lubricating substance is filled into fine holes generated by the treatment.
  • alumite treatment a hard coating mainly composed of aluminum oxide is formed on the ring groove surface, so that the aluminum alloy that is the piston base material is prevented from falling off and adhesion to the piston ring is suppressed.
  • the cost required for anodizing the piston is high, and aluminum oxide has a problem that initial conformability is poor because it is hard.
  • Patent Document 2 describes a method of forming a film in which molybdenum disulfide, which is a solid lubricant, is dispersed in polyamide, polyimide, which is a heat-resistant resin, on the side surface of the piston ring.
  • molybdenum disulfide which is a solid lubricant
  • polyamide polyamide
  • polyimide which is a heat-resistant resin
  • Patent Document 3 describes a method of forming a surface film composed of a heat-resistant resin containing copper-based powder on the side surface of the piston ring.
  • Patent Document 3 it is said that by adding copper-based powder, it is possible to impart wear resistance to the surface film formed on the surface of the piston ring and to make the lubricity due to the heat-resistant resin function for a long time.
  • Patent Document 4 discloses a coating layer comprising a polyamideimide resin as a main component, a coating film modifier of a polyamideimide resin, and a dry film lubricant containing hard particles such as alumina. It has been shown that, by forming on the sliding surface of the sliding member having a mark, the friction coefficient can be reduced while improving the wear resistance and adhesion of the sliding member. And it is described that the hard particles are preferably alumina or silicon nitride having a predetermined hardness from the balance of wear resistance and wear of the counterpart material.
  • Patent Document 2 a solid lubricant is added as an essential component.
  • the solid lubricant itself cleaves and wears, thereby reducing the coefficient of friction of the film and attacking the ring groove. Has eased. Therefore, the abrasion resistance of the film is low, and it is difficult to maintain the film over a long period of time and maintain the aluminum adhesion preventing effect.
  • an object of the present invention is to provide a piston ring that solves the above problems and can maintain an excellent aluminum adhesion prevention effect for a long time in a high-power engine.
  • the present inventors have been able to provide excellent aluminum agglomeration over a long period of time even in a high-power engine by coating at least one of the upper and lower sides of the piston ring with a polyimide film containing hard particles.
  • the inventors have found that the effect of preventing wearing can be sustained and have arrived at the present invention. That is, the piston ring of the present invention is characterized in that at least one of the upper and lower side surfaces is coated with a polyimide film containing hard particles.
  • the film of the present invention in which hard particles are dispersed in polyimide has a low friction coefficient and high hardness. Therefore, the surface of the aluminum alloy piston, which is a counterpart material, can be smoothed in a short time without roughening the surface, and the occurrence of aluminum adhesion can be effectively prevented. Moreover, the film of the present invention is excellent in wear resistance by using polyimide having excellent heat resistance as a matrix resin (base) and adding hard particles. Furthermore, the mating material is smoothed at the initial stage of sliding and the frictional force is greatly reduced, so that wear and thermal decomposition at high temperatures are suppressed, and the coating is maintained over a long period of time.
  • membrane of this invention utilizes the lubrication characteristic of the polyimide which is a matrix resin and does not require addition of a solid lubricant, the abrasion of the film
  • the piston ring of the present invention will be described in detail below.
  • the base material of the piston ring of the present invention is not particularly limited, but it is desirable that the base material has a predetermined strength because the collision with the ring groove is repeated.
  • Preferable materials include steel, martensitic stainless steel, austenitic stainless steel, high-grade cast iron and the like.
  • a phosphate coating may be formed on the surface of the piston ring base material.
  • the phosphate coating include zinc phosphate, manganese phosphate, and calcium phosphate coatings.
  • a chemical conversion treatment film and an oxide film other than a phosphate film can also be formed.
  • a piston ring with a hard chrome plating film or electroless nickel plating film formed on the surface of the base metal cannot be formed with a chemical conversion treatment film. Therefore, in order to ensure adhesion of the film, remove inorganic and organic dirt. It is desirable to remove. Also, blasting may be performed to adjust the surface roughness.
  • the coating covering the piston ring of the present invention contains polyimide which is a heat resistant resin and hard particles.
  • a film having a low friction coefficient and a high hardness can be obtained by dispersing hard particles in polyimide having excellent lubricating properties.
  • the surface of the ring groove of the aluminum alloy piston, which is the counterpart material can be smoothed in a short time and the occurrence of aluminum adhesion can be effectively suppressed.
  • the film is excellent in wear resistance, and the heat resistance of the film is excellent because polyimide having excellent heat resistance is used as the matrix resin.
  • the surface of the piston material is smoothed at the initial stage of sliding, and the frictional force is greatly reduced, so that wear and thermal decomposition at high temperatures are suppressed, and the film is maintained over a long period of time. Therefore, with the piston ring of the present invention, even in a high-power engine, the film is maintained over a long period of time, and an excellent aluminum adhesion prevention effect can be maintained.
  • solid lubricants such as polytetrafluoroethylene (PTFE), molybdenum disulfide, and graphite have become essential components or components that are desirably added. However, in the present invention, it is preferable not to add the solid lubricant.
  • the solid lubricant is limited to 1%, preferably 0.8% with respect to the total volume of the film.
  • the solid lubricant itself cleaves and wears, thereby reducing the coefficient of friction of the film and reducing the aggressiveness to the ring groove.
  • the lubricant may roughen the mating material surface. Therefore, it is difficult to maintain the film over a long period of time at a high temperature and to maintain an excellent aluminum adhesion prevention effect.
  • the effect of the present invention can be obtained by coating the coating of the present invention on at least one of the upper and lower side surfaces of the piston ring. In particular, by coating the lower surface, an excellent aluminum adhesion prevention effect is exhibited. . Even better effects can be obtained by covering the upper and lower side surfaces of the piston ring.
  • the polyimide used for this invention is not specifically limited, Since the film
  • Rika Coat SN-20, Rika Coat PN-20, Rika Coat EN-20 manufactured by Shin Nippon Rika Co., Ltd.
  • FC-114 Fine Polyimide Varnish manufactured by Fine Chemical Japan Co., Ltd.
  • U-Varnish-A U-Varnish- S
  • H801D, H850D manufactured by Arakawa Chemical Industries, Ltd.
  • RC5057, RC5097, RC5019 manufactured by IST Co., Ltd.
  • polyimide is used as the matrix resin material, but less than 50%, preferably up to 20%, more preferably up to 5% of the total volume of the polyamide, polyamide Other heat resistant resins such as imide, polybenzimidazole, and polytetrafluoroethylene may be added.
  • Examples of the hard particles added to the film covering the piston ring of the present invention include alumina, silica, zirconia, titania, silicon carbide, boron carbide, zirconium carbide, silicon nitride, boron nitride (cubic crystal), diamond and the like. Of these, alumina, zirconia, silicon carbide, silicon nitride, boron nitride (cubic crystal), and diamond are preferable.
  • alumina, zirconia, silicon carbide, silicon nitride, boron nitride (cubic crystal), and diamond are preferable.
  • the kind is not specifically limited, (alpha) alumina, (gamma) alumina, etc. are used. In general, ⁇ -alumina is used as the hard particles.
  • the average particle size of the hard particles is preferably from 0.01 to 5 ⁇ m, more preferably from 0.01 to 0.5 ⁇ m. If the average particle diameter is less than 0.01 ⁇ m, uniform dispersion may be difficult due to aggregation of the particles, and the effect of smoothing the ring groove surface may be insufficient. On the other hand, if the average particle diameter exceeds 5 ⁇ m, the retention force of the particles on the polyimide may be reduced, or the ring groove surface may be roughened by the particles in the film.
  • the addition amount of the hard particles is preferably adjusted so as to obtain an optimum film hardness. Specifically, it is preferable to adjust the hardness (at room temperature) of the film so that it is in the range of ⁇ 40% with respect to the piston hardness at 250 ° C. By adjusting the film hardness within this range, the aggressiveness of both the film and the piston against the mating material at a high temperature is further reduced, and the surface of both the film and the piston is not roughened or worn. The surface can be maintained as a smooth surface having an excellent effect of preventing aluminum adhesion.
  • a more excellent aluminum adhesion prevention effect can be sustained. If the piston hardness at 250 ° C. is adjusted to 100% and the film hardness is adjusted to less than 60%, the film is likely to be worn and a sufficient aluminum adhesion preventing effect may not be obtained. On the other hand, if the piston hardness at 250 ° C. is adjusted to 100% and the film hardness is adjusted to exceed 140%, the attacking ability to the ring groove is increased, which may cause ring groove wear.
  • the film hardness HV of the present invention is preferably 30 to 70.
  • the piston ring having the coating of the present invention exhibits an excellent effect in combination with an aluminum alloy piston containing 8.5 to 30% by mass of Si.
  • the aluminum alloy has a hypereutectic structure, it effectively exhibits an aluminum adhesion preventing effect.
  • the thickness of the coating covering the piston ring of the present invention is preferably 2 to 30 ⁇ m, more preferably 4 to 20 ⁇ m. If the thickness is less than 2 ⁇ m, the film may be worn out before the surface of the ring groove is smoothed, and the aluminum adhesion preventing effect may not be sufficiently exhibited. On the other hand, when the thickness of the coating exceeds 30 ⁇ m, there is a possibility that inconvenience may occur when the piston ring is mounted in the ring groove, which is not preferable in terms of cost.
  • the film forming method of the present invention is not particularly limited, and known methods such as spray coating, spin coating, roll coating, dip coating, and printing methods are used.
  • the printing method is preferable because it is excellent in coating efficiency and can suppress the occurrence of smears.
  • spray coating is preferable in terms of simplicity.
  • the method for adjusting the coating liquid or ink is not particularly limited, but after dispersing hard particles in a commercially available polyimide varnish, if necessary, it is preferable to add a solvent to adjust the viscosity to an optimum value. .
  • the viscosity of the coating liquid or ink and the solvent and additive used for adjustment are appropriately selected depending on the coating method or the printing method.
  • the dispersion method is not particularly limited, and a known method such as a sand mill, a bead mill, a ball mill, or a roll mill is used. At this time, a dispersant or the like may be appropriately added as necessary. By uniformly dispersing hard particles in polyimide, a more excellent ring groove surface smoothing effect can be obtained, and the aluminum adhesion preventing effect can be further improved.
  • After applying the coating liquid or after printing it is dried and subjected to a curing treatment. Usually, curing is carried out at 250 to 400 ° C. for 1 hour. When the curing temperature exceeds 400 ° C., oxidative decomposition of polyimide occurs and is not preferable.
  • Example 1 A CrN film having a thickness of about 30 ⁇ m was formed on the outer peripheral surface of a piston ring made of low chromium steel by ion plating.
  • the obtained piston ring was degreased with alkali and then immersed in an aqueous manganese phosphate solution heated to about 80 ° C. for 5 minutes to form a manganese phosphate film having a thickness of about 2 ⁇ m on the surface other than the outer peripheral surface of the piston ring.
  • Alumina (Al 2 O 3 ) powder having an average particle size (particle size at 50% cumulative height) 0.5 ⁇ m was added to polyimide (PI) varnish (Rika Coat SN-20, manufactured by Shin Nippon Rika Co., Ltd.), and a stirrer was added. Then, after sufficiently stirring, the coating liquid was adjusted by passing it through a three-roll mill with a minimum roll interval. Here, the addition amount of the alumina powder was adjusted to 10% with respect to the mass of the entire film.
  • the coating liquid was spray-coated on the upper and lower sides of the piston ring on which the manganese phosphate film was formed, and then dried at 100 ° C. for 10 minutes, and further heated in an electric furnace at 280 ° C. for 1 hour.
  • the thickness (one side) of the obtained film was about 10 ⁇ m, and the film hardness HV was 39.
  • the indentation hardness (Hit) was measured at 10 points and the average value was used.
  • Example 2 A film was formed on the upper and lower side surfaces of the piston ring in the same manner as in Example 1 except that instead of alumina powder, silicon carbide (SiC) powder having an average particle size of 0.5 ⁇ m was used as the hard particles.
  • the thickness (one side) of the obtained film was about 10 ⁇ m, and the film hardness HV was 41.
  • Example 7 As hard particles, the average particle diameter is 0.008 ⁇ m (Example 3), 0.01 ⁇ m (Example 4), 0.03 ⁇ m (Example 5), 0.05 ⁇ m (Example 6), 1 ⁇ m (implemented), respectively.
  • Example 7 A film was formed on the upper and lower side surfaces of the piston ring in the same manner as in Example 1 except that alumina powder of 5 ⁇ m (Example 8) and 8 ⁇ m (Example 9) was used. The thickness of the obtained film was about 10 ⁇ m. Table 1 shows the results of measuring the film hardness of each film.
  • Example 10 With the total mass of the coating as 100, the addition amount of alumina powder was 3% by mass (Example 10), 5% by mass (Example 11), 20% by mass (Example 12), and 30% by mass (Example), respectively. 13) and 40% by mass (Example 14), except that the coating was formed on the upper and lower side surfaces of the piston ring in the same manner as in Example 1.
  • the thickness (one side) of the obtained film was about 10 ⁇ m. Table 1 shows the results of measuring the film hardness of each film.
  • Example 15 to 17 Similar to Example 1 except that the coating amount was adjusted so that the film thickness (one side) was 2 ⁇ m (Example 15), 4 ⁇ m (Example 16), and 20 ⁇ m (Example 17), respectively.
  • a film was formed on the upper and lower sides of the piston ring. The results of measuring the film hardness of each film are shown in Table 1.
  • Example 2 A film was formed on the upper and lower side surfaces of the piston ring in the same manner as in Example 1 except that the additive material was changed from alumina powder to molybdenum disulfide powder (average particle size 2 ⁇ m) and graphite powder (average particle size 2 ⁇ m). The addition amount of the molybdenum disulfide powder and the graphite powder was 5% by mass, with the total mass of the film being 100. The thickness (one side) of the obtained film was about 10 ⁇ m, and the film hardness HV was 25.
  • alumina powder having an average particle diameter of 0.5 ⁇ m is added to a solution obtained by diluting a polyamideimide resin (Toyobo Co., Ltd .: HR16NN) with N-methyl-2-pyrrolidone, and after sufficiently stirring with a stirrer, roll
  • the coating liquid was adjusted by passing through a three-roll mill with a minimum interval.
  • the addition amount of the alumina powder was adjusted so as to be 10% by mass, where the mass of the entire coating was 100.
  • a film was formed on the same piston ring as in Example 1 by the same method as in Example 1.
  • the thickness (one side) of the obtained film was about 10 ⁇ m, and the film hardness HV was 70.
  • Example 5 A film was formed on the upper and lower side surfaces of the piston ring in the same manner as in Example 1 except that the additive material was changed from alumina powder to scaly copper powder having an average particle diameter (long axis length of scale) of 10 ⁇ m. The addition amount of the scaly copper powder was 20% by mass with the total mass of the film being 100. The thickness of the obtained film was about 10 ⁇ m, and the film hardness HV was 29.
  • Table 1 shows the results of evaluating the remaining amount of coating on the piston ring after the single unit adhesion test, the presence or absence of adhesion, the wear amount of the piston material, and the surface roughness.
  • Each evaluation item was represented by the following criteria.
  • the surface roughness of the piston material was calculated from the level difference Rk of the core part based on JISB0633.
  • the surface roughness Rk of the piston material before the unit adhesion test was about 1.0 ⁇ m.
  • Comparative Example 1 in which a film obtained by dispersing molybdenum disulfide and graphite in polyamideimide was coated, the polyamideimide film did not remain at all after the unit adhesion test, and the wear progressed to the underlying manganese phosphate film. Remarkable aluminum adhesion was observed. Further, it was confirmed that the surface of the piston material was not smoothed and the wear was progressing.
  • Comparative Example 2 in which a film in which molybdenum disulfide and graphite are dispersed in polyimide is coated, the occurrence of aluminum adhesion is suppressed compared to Comparative Example 1, but the remaining amount of the polyimide film is small and the piston material is almost smoothed. No progress was observed in the wear.
  • Comparative Example 3 in which a film in which alumina powder is dispersed in polyamideimide was coated, the smoothing effect of the piston material was improved as compared with Comparative Examples 1 and 2, but the film of the piston ring was hardly left and adhered. And the piston material was also worn.
  • Comparative Example 4 in which copper powder was dispersed in polyamideimide and in Comparative Example 5 in which a film in which copper powder was dispersed in polyimide was coated, the occurrence of aluminum adhesion was observed. In Comparative Examples 4 and 5, it was confirmed that almost no piston ring film remained, the piston material was worn, and the surface was not smoothed.
  • Example 1 in which a film in which alumina powder was dispersed in polyimide was coated and in Example 2 in which a film in which silicon carbide was dispersed in polyimide was coated, no aluminum adhesion was observed, and the film was worn.
  • the wear of the piston material was small, and the surface of the piston material was smoothed. Since the film in which hard particles are dispersed in polyimide has a low friction coefficient and high hardness, it is considered that the excellent aluminum adhesion prevention effect was exhibited by smoothing the piston material surface in a short time. .
  • the smoothness at the beginning of sliding makes the piston material less aggressive and prevents the piston material from being worn.
  • the coating itself has excellent heat resistance and no solid lubricant is added. It is presumed that the film was maintained even at high temperatures. In addition, about Example 1 and 2, the simple substance adhesion test was done for 10 hours, but aluminum adhesion was not recognized. By smoothing the piston material in the early stage of sliding, it is considered that the excellent aluminum adhesion preventing effect was maintained even in further collision and sliding at high temperatures. In Examples 1 and 3 to 9 in which the average particle size of the alumina particles was changed, no aluminum adhesion was observed, and the wear of the film was small.
  • Examples 1, 4, 5, 6, 7 and 8 in which the average particle diameter of alumina is in the range of 0.01 to 5 ⁇ m show a more excellent smoothing effect of the piston material, and the wear amount of the piston material is smaller. It was very small, less than 0.5 ⁇ m.
  • Examples 1 and 10 to 14 in which the addition amount of alumina particles was changed no aluminum adhesion was observed, and the wear of the film was small.
  • Examples 1 and 11 to 13 in which the addition amount of alumina powder is 5% by mass to 30% by mass and the film hardness is in the range of 30 to 70 more excellent wear resistance of the film and piston material The amount of wear of the piston material was very small, less than 0.5 ⁇ m.
  • the film hardness of Examples 1 and 11 to 13 was in the range of ⁇ 40% with respect to the hardness of 50 HV of the piston material at the test temperature of 250 ° C.
  • Examples 1 and 15 to 17 in which the thickness of the film was changed no aluminum adhesion was observed.
  • Examples 1, 16, and 17 in which the film thickness is in the range of 4 ⁇ m to 20 ⁇ m show more excellent film wear resistance and piston material smoothing effect, and the piston material wear amount is 0. Very small, less than 5 ⁇ m.
  • the film thickness after the unit adhesion test was 0.5 to 1.0 ⁇ m.
  • FIG. 3 shows the relationship between the average particle diameter of the additive (alumina particles) and the amount of film remaining on the lower surface of the piston ring (Examples 1 and 4 to 9).
  • the vertical axis is expressed as a relative value with the remaining film amount of a sample (Example 4) having an average particle size of alumina particles of 0.01 ⁇ m as 100.
  • FIG. 4 shows the relationship between the average particle diameter of alumina particles and the amount of groove wear on the lower surface of the top ring groove (Examples 1 and 4 to 9).
  • the vertical axis represents the relative value with the groove wear amount of a sample (Example 4) having an average particle diameter of alumina particles of 0.01 ⁇ m as 100.
  • FIG. 3 confirms that the remaining amount of the film is large when the average particle diameter of the alumina particles is in the range of 0.01 ⁇ m to 5 ⁇ m, and the remaining amount of the film is further increased in the range of 0.01 ⁇ m to 0.5 ⁇ m. It was.
  • the average particle diameter of the alumina particles is in the range of 0.01 ⁇ m to 5 ⁇ m, the retention of the alumina particles on the polyimide is high, so that the amount of wear of the coating is reduced, and the average particle diameter of the alumina particles is 0.01 ⁇ m to 0.00.
  • the fine alumina particles are further uniformly dispersed in the polyimide, and the variation in hardness in the film is small. Therefore, it is considered that the wear amount of the film is further reduced.
  • the groove wear amount was small, and when 0.01 ⁇ m to 0.5 ⁇ m, the groove wear amount was further reduced. In this range, it is considered that the surface of the ring groove was effectively smoothed by the alumina particles in the film, and the attacking property on the surface of the ring groove was minimized.
  • FIG. 5 shows the relationship between the coating hardness of the piston ring and the remaining coating amount on the lower surface of the piston ring (Examples 1 and 10 to 14).
  • the vertical axis represents the relative value, with the film residual amount being a film hardness HV of 28 (-44% hardness with respect to piston hardness at 250 ° C. (Example 10)) being 100.
  • FIG. 6 shows the relationship between the coating hardness of the piston ring and the amount of groove wear on the lower surface of the top ring groove (Examples 1 and 10 to 14).
  • the vertical axis is expressed as a relative value with the wear amount of the lower surface of the top ring groove of the sample (Example 10) having a coating hardness HV of 250 ° C.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

L'invention concerne un segment de piston qui peut maintenir sur une longue période l'excellent effet de prévention de l'adhésion de l'aluminium dans un moteur de grande puissance. Au moins l'une des surfaces supérieure et inférieure d'un segment de piston est recouverte d'un revêtement polyimide dans lequel ont été dispersées des particules dures. Les particules dures utilisées sont en oxyde d'aluminium, en zircone, en carbure de silicium, en nitrure de silicium, en nitrure de bore cubique, en diamant ou similaire. Les particules dures ont un diamètre de particule moyen de 0,01-5 µm et le revêtement a une épaisseur de 2-30 µm.
PCT/JP2010/071931 2009-12-08 2010-12-07 Segment de piston et dispositif à piston WO2011071049A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP10835969.6A EP2511575B1 (fr) 2009-12-08 2010-12-07 Segment de piston et dispositif à piston
JP2011545217A JP5545774B2 (ja) 2009-12-08 2010-12-07 ピストンリング及びピストン装置
CN201080055179.0A CN102648366B (zh) 2009-12-08 2010-12-07 活塞环和活塞装置
US13/514,509 US9062769B2 (en) 2009-12-08 2010-12-07 Piston ring and piston device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009278526 2009-12-08
JP2009-278526 2009-12-08

Publications (1)

Publication Number Publication Date
WO2011071049A1 true WO2011071049A1 (fr) 2011-06-16

Family

ID=44145593

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/071931 WO2011071049A1 (fr) 2009-12-08 2010-12-07 Segment de piston et dispositif à piston

Country Status (5)

Country Link
US (1) US9062769B2 (fr)
EP (1) EP2511575B1 (fr)
JP (1) JP5545774B2 (fr)
CN (1) CN102648366B (fr)
WO (1) WO2011071049A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014034180A1 (fr) * 2012-08-28 2014-03-06 株式会社リケン Segment de piston
EP2843083A2 (fr) 2013-08-30 2015-03-04 Kabushiki Kaisha Riken Segment de piston pour moteurs à combustion interne
WO2015056450A1 (fr) * 2013-10-18 2015-04-23 株式会社リケン Segment de piston pour moteur à combustion interne
JP2015102188A (ja) * 2013-11-26 2015-06-04 株式会社リケン 内燃機関用ピストンリング
JP5826958B1 (ja) * 2014-07-29 2015-12-02 株式会社リケン 内燃機関用ピストンリング
WO2017199476A1 (fr) * 2016-05-20 2017-11-23 株式会社不二機販 Procédé de prévention d'adhérence d'aluminium

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008055194A1 (de) 2008-12-30 2010-07-08 Federal-Mogul Wiesbaden Gmbh Gleitelement
JP5794634B2 (ja) * 2010-01-29 2015-10-14 日本ピストンリング株式会社 ピストンリング
CN104685267B (zh) * 2012-10-02 2017-02-22 株式会社理研 活塞环
JP6120361B2 (ja) * 2013-03-28 2017-04-26 トーカロ株式会社 電飾防止用転がり軸受の製造方法
US9551419B2 (en) 2015-04-22 2017-01-24 Federal-Mogul Corporation Coated sliding element
DE102017007000B3 (de) * 2017-07-26 2019-01-03 Federal-Mogul Burscheid Gmbh Verfahren zur Herstellung eines Kolbenrings

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62233458A (ja) 1986-03-31 1987-10-13 Riken Corp ピストンリング
JPS63170546A (ja) 1987-01-05 1988-07-14 Fujikura Ltd 内燃機関のピストン
JP2001031906A (ja) * 1999-07-23 2001-02-06 Riken Corp 摺動部材用被覆組成物及び内燃機関用ピストンリング
JP2006022666A (ja) * 2004-07-06 2006-01-26 Toyota Central Res & Dev Lab Inc 非晶質硬質炭素膜を備えたピストンリング、ピストン、シリンダ、ピストンピン
WO2007099968A1 (fr) 2006-02-28 2007-09-07 Nippon Piston Ring Co., Ltd. Segment de piston
JP2008128482A (ja) * 2006-11-27 2008-06-05 Riken Corp ピストンリング
JP4151379B2 (ja) 2002-10-29 2008-09-17 トヨタ自動車株式会社 摺動部材
JP2008248986A (ja) * 2007-03-29 2008-10-16 Nippon Piston Ring Co Ltd ピストンリング

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306350B (en) * 1995-10-30 1998-05-06 Riken Kk Wear-resistant parts, particularly the piston ring of an internal combustion engine
JP3416049B2 (ja) * 1998-02-27 2003-06-16 株式会社リケン 摺動部用被覆材およびピストンリング
JP2003254155A (ja) * 2002-02-27 2003-09-10 Teikoku Piston Ring Co Ltd 組合せオイルリング
US20050269787A1 (en) * 2002-07-25 2005-12-08 Kabushiki Kaisha Riken Piston ring
JP4212954B2 (ja) * 2003-05-23 2009-01-21 日産自動車株式会社 硬質炭素被膜摺動部材
DE112007002854T5 (de) * 2006-11-24 2009-10-29 Kabushiki Kaisha Riken Kolbenring
JP5021396B2 (ja) * 2007-08-24 2012-09-05 日本ピストンリング株式会社 ピストンリング
DE102008038636B4 (de) * 2007-08-24 2012-10-25 Nippon Piston Ring Co., Ltd. Kolbenring
US20100319647A1 (en) * 2007-11-30 2010-12-23 Nippon Piston Ring Co., Ltd. Combination structure of piston ring and cylinder liner for internal combustion engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62233458A (ja) 1986-03-31 1987-10-13 Riken Corp ピストンリング
JPS63170546A (ja) 1987-01-05 1988-07-14 Fujikura Ltd 内燃機関のピストン
JP2001031906A (ja) * 1999-07-23 2001-02-06 Riken Corp 摺動部材用被覆組成物及び内燃機関用ピストンリング
JP4151379B2 (ja) 2002-10-29 2008-09-17 トヨタ自動車株式会社 摺動部材
JP2006022666A (ja) * 2004-07-06 2006-01-26 Toyota Central Res & Dev Lab Inc 非晶質硬質炭素膜を備えたピストンリング、ピストン、シリンダ、ピストンピン
WO2007099968A1 (fr) 2006-02-28 2007-09-07 Nippon Piston Ring Co., Ltd. Segment de piston
JP2008128482A (ja) * 2006-11-27 2008-06-05 Riken Corp ピストンリング
JP2008248986A (ja) * 2007-03-29 2008-10-16 Nippon Piston Ring Co Ltd ピストンリング

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2511575A4 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150176710A1 (en) * 2012-08-28 2015-06-25 Kabushiki Kaisha Riken Piston ring
WO2014034180A1 (fr) * 2012-08-28 2014-03-06 株式会社リケン Segment de piston
JP5719031B2 (ja) * 2012-08-28 2015-05-13 株式会社リケン ピストンリング
EP2843083A2 (fr) 2013-08-30 2015-03-04 Kabushiki Kaisha Riken Segment de piston pour moteurs à combustion interne
EP2843083A3 (fr) * 2013-08-30 2015-04-08 Kabushiki Kaisha Riken Segment de piston pour moteurs à combustion interne
US9261191B2 (en) 2013-08-30 2016-02-16 Kabushiki Kaisha Riken Piston ring for internal combustion engine
WO2015056450A1 (fr) * 2013-10-18 2015-04-23 株式会社リケン Segment de piston pour moteur à combustion interne
US9920836B2 (en) 2013-10-18 2018-03-20 Kabushiki Kaisha Riken Piston ring for internal combustion engine
JP2015102188A (ja) * 2013-11-26 2015-06-04 株式会社リケン 内燃機関用ピストンリング
JP5826958B1 (ja) * 2014-07-29 2015-12-02 株式会社リケン 内燃機関用ピストンリング
WO2017199476A1 (fr) * 2016-05-20 2017-11-23 株式会社不二機販 Procédé de prévention d'adhérence d'aluminium
JP2017206762A (ja) * 2016-05-20 2017-11-24 株式会社不二機販 アルミの凝着防止方法
US11041245B2 (en) 2016-05-20 2021-06-22 Fuji Kihan Co., Ltd. Method for preventing adhesion of aluminum

Also Published As

Publication number Publication date
CN102648366A (zh) 2012-08-22
EP2511575A4 (fr) 2015-08-05
CN102648366B (zh) 2015-10-14
US20120242047A1 (en) 2012-09-27
JPWO2011071049A1 (ja) 2013-04-22
US9062769B2 (en) 2015-06-23
EP2511575A1 (fr) 2012-10-17
EP2511575B1 (fr) 2016-08-24
JP5545774B2 (ja) 2014-07-09

Similar Documents

Publication Publication Date Title
JP5545774B2 (ja) ピストンリング及びピストン装置
JPWO2008062863A1 (ja) ピストンリング
JP5391368B2 (ja) ピストンリング
JP2004149622A (ja) 摺動部材
JP5430777B2 (ja) ピストンリング
JPWO2015004993A1 (ja) 鉄系溶射被膜、これを用いた内燃機関用シリンダーブロック及び内燃機関用摺動機構
JP5127331B2 (ja) 乾性潤滑被膜組成物及び該乾性潤滑被膜組成物を摺動層としたすべり軸受
JP4634093B2 (ja) 摺動部材用組成物
JP5479658B1 (ja) ピストンリング
JP5719031B2 (ja) ピストンリング
JP2008128482A (ja) ピストンリング
JP5981013B1 (ja) 内燃機関用ピストンリング
JP4847817B2 (ja) ピストンリング
JP2015127560A (ja) 内燃機関用ピストンリング
JP5524432B1 (ja) ピストンリング
JP2016033418A (ja) 内燃機関用ピストンリング

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 201080055179.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10835969

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2011545217

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 4659/CHENP/2012

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 13514509

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2010835969

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 1201002653

Country of ref document: TH

Ref document number: 2010835969

Country of ref document: EP