WO2014168112A1 - 密封摺動部材 - Google Patents
密封摺動部材 Download PDFInfo
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- WO2014168112A1 WO2014168112A1 PCT/JP2014/060091 JP2014060091W WO2014168112A1 WO 2014168112 A1 WO2014168112 A1 WO 2014168112A1 JP 2014060091 W JP2014060091 W JP 2014060091W WO 2014168112 A1 WO2014168112 A1 WO 2014168112A1
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- carbon
- sliding surface
- carbon fiber
- silicon carbide
- sliding member
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/71—Ceramic products containing macroscopic reinforcing agents
- C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
- C04B35/80—Fibres, filaments, whiskers, platelets, or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3496—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member use of special materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/56—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
- C04B35/565—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
- C04B35/573—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained by reaction sintering or recrystallisation
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- 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
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/26—Compounds containing silicon or boron, e.g. silica, sand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/003—Preventing or minimising internal leakage of working-fluid, e.g. between stages by packing rings; Mechanical seals
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/428—Silicon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
- C04B2235/524—Non-oxidic, e.g. borides, carbides, silicides or nitrides
- C04B2235/5248—Carbon, e.g. graphite
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5252—Fibers having a specific pre-form
- C04B2235/5256—Two-dimensional, e.g. woven structures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5268—Orientation of the fibers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/616—Liquid infiltration of green bodies or pre-forms
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/963—Surface properties, e.g. surface roughness
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/55—Seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/20—Oxide or non-oxide ceramics
- F05D2300/22—Non-oxide ceramics
- F05D2300/224—Carbon, e.g. graphite
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/20—Oxide or non-oxide ceramics
- F05D2300/22—Non-oxide ceramics
- F05D2300/226—Carbides
- F05D2300/2261—Carbides of silicon
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
- F05D2300/614—Fibres or filaments
Definitions
- the present invention relates to a sealing sliding member used for a mechanical seal or the like.
- Silicon carbide is a material that has a good heat resistance, a high Young's modulus, is hard, and can realize a low-abrasion sliding member.
- silicon carbide has a poor self-lubricating property.
- the sealing sliding member using this has the subject that it is difficult to use in the dry environment where the lubricity by a fluid is scarce.
- the sealing sliding member using silicon carbide has a problem that it is hard but has low toughness and is easily cracked.
- Patent Document 1 a technique for compensating for the problems of silicon carbide materials by using carbon fibers has been proposed (see Patent Document 1 and Patent Document 2).
- the silicon carbide and carbon composite material according to the prior art using carbon fiber is a material used for a brake disk, it has a high coefficient of friction and is required to have a material with a low coefficient of friction. When used as a sliding member, it has been difficult to achieve both good sliding characteristics and sealing characteristics.
- This invention is made in view of such a subject, and is providing the sealing sliding member provided with the suitable sealing characteristic and lubricity, being provided with the characteristic of silicon carbide that it is hard and it is low wear.
- the sealing sliding member according to the present invention is: A sealing sliding member that has a sliding surface that slides relative to another member and seals fluid through the sliding surface; A carbon fiber in which the longitudinal direction of the fiber is oriented substantially parallel to the sliding surface; And silicon carbide provided between the plurality of carbon fibers.
- the carbon fiber creates an advantageous effect on sliding, and silicon carbide is harder than the carbon fiber, so that it functions as a load receiver for the mating member to slide. Silicon carbide dispersed and present between the carbon fibers exhibits a good effect as a load receiver.
- a carbon fiber bundle portion that is an aggregate in which the longitudinal directions of the plurality of carbon fibers are oriented in substantially the same direction may be formed, and the silicon carbide is between the carbon fibers included in the carbon fiber bundle portion. It may be formed.
- a gap having a specific length is formed between the fibers, and the gap portion functions as a fluid pool. That is, lubricity is improved by the fluid flowing into and out of the gap. Further, since silicon carbide is formed in the gaps between the carbon fibers of the carbon fiber bundle portion, a load receiver is formed at a position close to the carbon fibers, so that it is difficult for the carbon fibers to be loaded.
- non-fiber carbon provided between one carbon fiber bundle portion and another carbon fiber bundle portion adjacent to the carbon fiber bundle portion may be further included.
- non-fiber carbon By the presence of non-fiber carbon between the carbon fiber bundle portion and the adjacent carbon fiber bundle portion, the non-fiber carbon acts as a self-lubricant and further improves slidability. In addition, lapping is performed to form a sliding surface. However, since the hardness of the carbon fiber itself or the hardness of silicon carbide in the carbon fiber bundle is higher than the hardness of non-fibrous carbon, sliding is performed by lapping. Non-fibrous carbon is lower than the carbon fiber bundle part with respect to the surface, and this part also functions as a fluid reservoir and improves lubricity.
- the plurality of carbon fiber bundle portions formed on the sliding surface may be randomly oriented.
- the silicon carbide may be present in an area ratio of 35% or more and less than 85% on the sliding surface.
- the area ratio of silicon carbide equal to or greater than a predetermined value, the amount of silicon carbide that supports the contact force can be secured and the load can be supported, and by making the area ratio of silicon carbide less than the predetermined value, It is possible to secure a fluid pool due to a gap between carbon fibers and improve lubricity.
- the arithmetic average roughness Ra of the sliding surface may be 0.2 ⁇ m or less.
- FIG. 1 is a perspective view of a sealing sliding member according to an embodiment of the present invention.
- FIG. 2 is a photomicrograph of the sliding surface.
- FIG. 3 is a partially enlarged photograph of FIG.
- FIG. 4 is a schematic view of an actual machine testing machine used in the leakage test of the example.
- FIG. 5 is a photomicrograph of the sliding surface of the sample produced in the example.
- FIG. 1 is a perspective view of a sealing sliding member 10 according to an embodiment of the present invention.
- the sealing sliding member 10 is disposed, for example, in a boundary portion between a rotating member that rotates together with the rotating shaft and a stationary member that does not rotate in the mechanical seal device.
- the sealing sliding member 10 is used as a pair of a member fixed to the rotating member side and a member fixed to the stationary member side.
- the sliding member 10 has a sliding surface 20 that slides with respect to another sliding member that is used as a pair, and seals fluid through the sliding surface 20 that slides.
- the sliding member 10 shown in FIG. 1 has a ring-shaped outer shape having a through hole in the center, and one of the surfaces orthogonal to the penetrating direction is the sliding surface 20.
- the shape of is not particularly limited.
- the sealed sliding member of the present invention may be used as both a rotating member and a stationary member, or may be used as one sealed sliding member.
- the sealing sliding member 10 is mainly composed of carbon and silicon carbide, but may contain other substances such as silicon.
- FIG. 2 is a photomicrograph of the sliding surface 20. On the sliding surface 20 of the sealing sliding member 10, a SiC-C fiber-shaped structure derived from a carbon fiber structure used in the manufacturing process of the sealing sliding member 10 is formed. In FIG. 2, the SiC-C fiber shape structure is observed as a line-like structure extending along the fiber direction.
- FIG. 3 is an enlarged view of a part of FIG. 2 and 3, the portion that appears white is silicon carbide, the portion that appears gray is carbon fiber, and the portion that appears black between the carbon fibers is non-fibrous carbon.
- a portion where a plurality of carbon fibers form an aggregate in which the carbon fibers are oriented in the same direction is one carbon fiber bundle portion, and the carbon fiber bundle portion and the streaky silicon carbide present therein contain SiC— C constitutes a fiber-shaped structure.
- silicon carbide is made of silicon carbide (SiC)
- carbon fiber and non-fiber carbon are made of carbon (C), but do not prevent other substances such as impurities from being included.
- Non-fibrous carbon is provided between one carbon fiber bundle portion and another carbon fiber bundle portion adjacent thereto and between carbon fibers constituting one carbon fiber portion. And those provided between silicon carbide or between silicon carbide and carbon fiber, the ratio and arrangement of non-fiber carbon are appropriately changed according to the use of the sealing sliding member 10 and the like. Just do it.
- the carbon fiber bundle portion has a width of about several tens of ⁇ m to several hundreds of ⁇ m along a direction perpendicular to the fiber direction 30. Further, there may be a portion formed in a lump shape by concentration of silicon carbide.
- carbon fibers constituting the carbon fiber bundle portion and silicon carbide provided between the carbon fibers are alternately arranged along a direction perpendicular to the fiber direction 30 (longitudinal direction of the fibers). Appear in One carbon fiber bundle portion in the SiC-C fiber shape structure has a width of about 0.2 mm to 4 mm along a direction perpendicular to the fiber direction 30.
- a plurality of carbon fiber bundle portions are formed on the sliding surface 20 such that the fiber directions 30 intersect each other.
- the arrangement state of each carbon fiber bundle part formed in the sliding surface 20 is not specifically limited,
- the carbon fiber bundle part which has the random fiber direction 30 may be disperse
- the bundle portion may be formed in a predetermined pattern such as a knitted shape.
- the fiber direction 30 of the carbon fiber bundle portion can be recognized from the extending direction of the streaky silicon carbide or carbon fiber included in the SiC-C fiber shape structure.
- silicon carbide exists in the sliding surface 20 in an area ratio of 35% or more and less than 85%. It is preferable to do. By making the area ratio of silicon carbide 35% or more, leakage of the sealing fluid from the sliding surface 20 can be effectively reduced, and the area ratio of silicon carbide is less than 85%. Thus, it is possible to effectively improve the lubricity of the sliding surface 20. Moreover, it is difficult to make the area ratio of silicon carbide 85% or more by an efficient manufacturing method.
- the arithmetic average roughness Ra (JIS B 0601: 2001) of the sliding surface 20 is preferably 0.01 ⁇ m or more and less than 1 ⁇ m.
- the arithmetic average roughness Ra of the sliding surface 20 is preferably 0.01 ⁇ m or more, it is possible to effectively improve the lubricity of the sliding surface 20, and the arithmetic average roughness of the sliding surface 20.
- the skewness Psk (JIS B 0601: 2001) of the sliding surface 20 is preferably in a negative range. By setting the skewness Psk in a negative range, it is possible to prevent a problem that the apex of the convex portion formed on the sliding surface 20 damages other members facing when sealing the fluid.
- the carbon fibers present on the sliding surface 20 are preferably formed so that the fiber direction 30 is along the plane direction of the sliding surface 20, thereby preventing the mating surface from being damaged by the ends of the carbon fibers. It is possible to slide, and it is possible to prevent the leakage path from being formed inside the sealed sliding ring and to make the fluid difficult to leak.
- the sliding surface 20 may include a silicon portion made of silicon (Si) (observed as a white lump from the silicon carbide portion inside the silicon carbide portion). good.
- the manufacturing method of the sealing sliding member 10 will be described, but the manufacturing method of the sealing sliding member 10 is not limited to the manufacturing method described below.
- carbon fiber as a raw material is prepared.
- the carbon fiber prepared in the first stage is not particularly limited.
- a PAN-based or pitch-based carbon fiber having a length of 1 mm to 10 mm and a thickness of 5 ⁇ m to 50 ⁇ m can be used.
- the carbon fiber is preferably oriented so that its longitudinal direction is parallel to the surface to be the sliding surface and is randomly two-dimensionally oriented to the entire surface of the sliding surface. .
- the carbon fibers whose longitudinal direction is parallel to the surface that becomes the sliding surface with respect to the sliding surface is 80% or more. It is good to be arranged in.
- carbon fibers that cannot be disposed parallel to the sliding surface may be included.
- these carbon fibers may be in the form of a sheet, and the longitudinal direction may be oriented parallel to the sliding surface.
- the sealing sliding member 10 is formed by adding carbon powder or a phenol resin to the carbon fiber prepared in the first stage, and further firing it if necessary. And a base whose outer shape substantially matches.
- the base may be formed by laminating carbon fibers formed in a sheet shape, adding carbon powder or a phenol resin, molding, and firing. Note that carbon derived from carbon powder or phenol resin constitutes non-fiber carbon in the sliding surface 20.
- a portion of the base carbon is obtained by impregnating the base formed in the second stage with molten silicon (Si) and firing at about 1400-1800 ° C. After making the SiC into SiC, the surface (especially the surface corresponding to the sliding surface 20) is finally polished as necessary to obtain the sealed sliding member 10.
- Si molten silicon
- the surface especially the surface corresponding to the sliding surface 20
- it is not necessary to uniformly make the entire base SiC a part of the base is made SiC to a depth of at least 1 mm from the sliding surface 20 in the manufactured sealed sliding member 10 in order to make it difficult to form a leakage path. It is preferable.
- Samples 1 to 7 are prepared by preparing PAN-based carbon fibers formed in a sheet shape (first stage), solidifying the sheet-shaped carbon fibers with a phenolic resin, and laminating them to form a base ( (Second stage), the base was impregnated with molten silicon and baked at 1500 ° C., and then the surface was polished (third stage). Samples 1 to 7 were all manufactured in the same manner up to the second step, and the area ratio of silicon carbide on the sliding surface 20 was changed by adjusting the SiC conversion conditions in the third step. Samples 1 to 7 after manufacture were subjected to image analysis of the micrograph of the sliding surface 20 using a laser microscope, and the area ratio of silicon carbide on the sliding surface 20 was measured using image processing software (Table 1). reference).
- a leakage test of the sealing sliding member 10 according to Sample 1 to Sample 7 was performed using an actual machine testing machine.
- the leakage test was conducted using water as the sealing fluid, the PV value of the product of the sliding surface pressure and velocity was 8 MPaG ⁇ m / s, the temperature was room temperature, and the same material was used as the counterpart.
- the evaluation results are shown in Table 1.
- the leakage amount of less than 3 ml / hr was determined as “ ⁇ ”
- the leakage amount of 3 ml / hr or more was determined as “x”.
- the surface roughness of the sliding surface in each sample was also measured before the leak test.
- the sealing sliding member 10 according to the samples 1 to 7 suitably suppresses the leakage of the sealing fluid from the sliding surface 20 while compensating for the problem of silicon carbide having poor self-lubricity.
- Table 1 in particular, Sample 3 to Sample 7 in which silicon carbide is present in an area ratio of 35% or more and less than 85% can effectively reduce leakage of the sealing fluid from the sliding surface 20. there were. Note that Sample 1 and Sample 2 in which leakage occurred under the above conditions can function appropriately as a mechanical seal if the application conditions are changed, such as by reducing the PV value.
- the sealing sliding member 10 is a SiC-C having carbon fibers forming a carbon fiber bundle portion and silicon carbide provided between the carbon fibers. Since a fiber-shaped structure is formed, it has suitable sealing properties and lubricity while having the characteristics of silicon carbide that is hard and low wear.
- the SiC-C fiber shape structure has a structure in which silicon carbide and carbon fiber are finely interlaced, and such SiC-C fiber structure is obtained by any one or a combination of factors described later, It is considered that the sliding surface 20 is given slidability.
- the carbon fiber and the carbon fiber are adjacent to each other, so that a gap is formed between the carbon fibers, and the gap functions as a fluid pool to provide lubricity.
- the carbon fiber itself functions as a lubricant.
- the hardness of the carbon fiber itself or the hardness of the silicon carbide in the carbon fiber bundle part is higher than the hardness of the non-fiber carbon by the lapping treatment, the non-fiber carbon between the carbon fibers becomes the carbon fiber bundle part.
- the slidability is imparted by the carbon constituting the non-fiber carbon portion acting as a solid lubricant.
- the orientation of the longitudinal direction of the fibers in the carbon fiber bundle portion is randomly oriented for each carbon fiber portion, so that it is difficult to form a leakage flow path on the sliding surface 20 and the sliding surface 20 It is possible to hold fluid and impart slidability.
- the SiC-C fibrous structure formed by converting part of the carbon fiber into SiC, such as the surface of the carbon fiber has a good bond between the carbon fiber and silicon carbide, and therefore cracks in the sealed sliding member 10. It is possible to suitably prevent the problem of occurrence of chipping or chipping.
- silicon carbide in the SiC-C fibrous structure has high strength, it can provide good wear resistance to the sealed sliding member 10 and prevent the sliding surface 20 from having too many gaps. .
- the sealing sliding member 10 capable of satisfying both the lubricity of the sliding surface 20 and the prevention of leakage of the sealing fluid from the sliding surface 20 is difficult to cope with the conventional sliding material. It can be particularly suitably used even under high temperature, high pressure and high speed conditions.
- the sealing sliding member 10 may be used in pairs with a sliding member in which a SiC-C fibrous structure is formed on the sliding surface 20, but is used in pairs with the sealing sliding member 10.
- the other sliding member may have a composition or a structure different from that of the sealing sliding member 10 such as one containing metal or one containing only carbon or silicon carbide.
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Abstract
Description
他の部材に対して摺動する摺動面を有し、当該摺動面を介して流体を密封する密封摺動部材であって、
前記摺動面に対し繊維の長手方向が略平行に配向されている炭素繊維と、
複数の前記炭素繊維の間に設けられた炭化珪素と、を有する。
炭素繊維束部は繊維方向30に垂直な方向に沿って、数十μm~数百μm程度の幅を有している。また、炭化珪素が集中することにより塊状に形成される箇所があっても良い。
20…摺動面
Claims (6)
- 他の部材に対して摺動する摺動面を有し、当該摺動面を介して流体を密封する密封摺動部材であって、
前記摺動面に対し繊維の長手方向が略平行に配向されている炭素繊維と、
複数の前記炭素繊維の間に設けられた炭化珪素と、を有することを特徴とする密封摺動部材。 - 複数の前記炭素繊維の長手方向が略同方向を向く集合体である炭素繊維束部が形成されており、前記炭化珪素が前記炭素繊維束部に含まれる前記炭素繊維の間に形成されている請求項1に記載の密封摺動部材。
- 一つの前記炭素繊維束部と、これに隣接する他の前記炭素繊維束部と、の間に設けられている非繊維炭素を、さらに有する請求項2に記載の密封摺動部材。
- 前記摺動面に形成された複数の前記炭素繊維束部は、ランダムに配向されている請求項3に記載の密封摺動部材。
- 前記摺動面において、前記炭化珪素が35%以上85%未満の面積比で存在する請求項4に記載の密封摺動部材。
- 前記摺動面の算術平均粗さRaが、0.2μm以下である請求項5に記載の密封摺動部材。
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EP14783510.2A EP2899436A4 (en) | 2013-04-09 | 2014-04-07 | SLIDING SEALING ELEMENT |
CN201480002726.7A CN104736905A (zh) | 2013-04-09 | 2014-04-07 | 密封滑动部件 |
US14/439,069 US20150291905A1 (en) | 2013-04-09 | 2014-04-07 | Sliding seal member |
JP2015511251A JP6219373B2 (ja) | 2013-04-09 | 2014-04-07 | 密封摺動部材 |
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EP (1) | EP2899436A4 (ja) |
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Cited By (5)
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CN107407421A (zh) * | 2015-03-20 | 2017-11-28 | 伊格尔工业股份有限公司 | 在水环境中使用的机械密封装置及其滑动环 |
JP2018071702A (ja) * | 2016-10-31 | 2018-05-10 | イーグル工業株式会社 | 冷凍機コンプレッサの軸封装置 |
WO2018110132A1 (ja) * | 2016-12-12 | 2018-06-21 | 株式会社フジキン | バルブおよび半導体製造装置 |
JP2018188323A (ja) * | 2017-04-28 | 2018-11-29 | クアーズテック株式会社 | 炭素短繊維強化複合材料およびその製造方法 |
JP7412226B2 (ja) | 2020-03-05 | 2024-01-12 | クアーズテック株式会社 | 摺動部品 |
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US9951772B2 (en) * | 2015-06-18 | 2018-04-24 | Bitzer Kuehlmaschinenbau Gmbh | Scroll compressor with unmachined separator plate and method of making same |
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EP2899436A1 (en) | 2015-07-29 |
JP6219373B2 (ja) | 2017-10-25 |
JPWO2014168112A1 (ja) | 2017-02-16 |
CN104736905A (zh) | 2015-06-24 |
EP2899436A4 (en) | 2016-07-27 |
US20150291905A1 (en) | 2015-10-15 |
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