WO2012023244A1 - 球帯状シール体 - Google Patents
球帯状シール体 Download PDFInfo
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- WO2012023244A1 WO2012023244A1 PCT/JP2011/004272 JP2011004272W WO2012023244A1 WO 2012023244 A1 WO2012023244 A1 WO 2012023244A1 JP 2011004272 W JP2011004272 W JP 2011004272W WO 2012023244 A1 WO2012023244 A1 WO 2012023244A1
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- Prior art keywords
- heat
- mass
- resistant material
- expanded graphite
- spherical
- Prior art date
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
- F01N13/1827—Sealings specially adapted for exhaust systems
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
- F16J15/0806—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing characterised by material or surface treatment
- F16J15/0812—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing characterised by material or surface treatment with a braided or knitted body
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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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/126—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement consisting of additions, e.g. metallic fibres, metallic powders, randomly dispersed in the packing
Definitions
- the present invention relates to a ball-shaped seal body suitable for use in a spherical joint of an automobile exhaust pipe.
- FIG. 15 shows an example of an exhaust passage of an automobile engine.
- Exhaust gas generated in each cylinder (not shown) of the engine is collected in an exhaust manifold catalytic converter 600 and is connected to a sub muffler through the exhaust pipe 601 and the exhaust pipe 602. 603.
- the exhaust gas that has passed through the sub-muffler 603 is further sent to the muffler (silencer) 606 through the exhaust pipe 604 and the exhaust pipe 605, and is released into the atmosphere through the muffler 606.
- connection portion 607 between the exhaust manifold catalytic converter 600 and the exhaust pipe 601 and the connection portion 608 between the exhaust pipe 604 and the exhaust pipe 605 are absorbed by vibrations such as an exhaust pipe spherical joint or a bellows type joint.
- an example of the vibration absorbing mechanism described above is an exhaust pipe joint described in Patent Document 1.
- this exhaust pipe joint has the advantage that the manufacturing cost can be reduced as compared with the bellows type joint and has excellent durability
- the seal body used in this exhaust pipe joint is made of expanded graphite.
- a heat-resistant material and a reinforcing material made of a wire mesh are compressed to fill the mesh of the reinforcing material with the heat-resistant material, and the heat-resistant material and the reinforcing material are mixed and integrated.
- the expanded graphite sheet used for this sealing body is usually oxidized by immersing a powder such as natural flake graphite or quiche graphite in anodic oxidation or concentrated sulfuric acid, for example, in a mixed acid obtained by adding nitric acid or the like. After washing with water and drying, it is heated and expanded to produce expanded graphitized powder, and the expanded graphite powder obtained here is produced by compression molding with a press or roll.
- This expanded graphite sheet is not only excellent in chemical resistance, heat resistance, heat insulation and electrical conductivity, which is a feature of graphite, but also has great flexibility and compression recovery, and can be used as various packing materials and high-temperature heat insulation materials. Widely used.
- this expanded graphite sheet is natural scaly graphite or quiche graphite, it contains a large amount of metal impurities such as silicon (Si), iron (Fe), aluminum (Al), and impurities such as ash. include.
- metal impurities such as silicon (Si), iron (Fe), aluminum (Al), and impurities such as ash.
- metal impurities such as silicon (Si), iron (Fe), aluminum (Al), and impurities such as ash.
- sulfur compound particularly sulfur (S)
- a spherical pipe joint is disposed in the vicinity of the exhaust gas manifold catalytic converter for the purpose of improving the NVH (vehicle acoustic vibration characteristics) of the automobile due to the increase in exhaust gas temperature resulting from the recent improvement in performance of automobile engines.
- the conventional seal body due to the rise in exhaust gas temperature caused by the closer of the spherical pipe joint to the engine side, the conventional seal body cannot satisfy the use conditions in terms of heat resistance, and the heat resistance of the seal body itself must be improved. Therefore, further improvement in heat resistance of the heat-resistant material is demanded from the above viewpoint.
- Patent Document 2 a sealing body that has heat resistance (oxidation wear resistance) and excellent sealing properties even at high temperatures exceeding 600 ° C.
- a cylindrical inner surface defining a through-hole is provided at the center, an outer surface is formed in a partially convex spherical shape, and an annular end surface is provided on the outer diameter side of this outer surface.
- a spherical belt-shaped sealing body used, the inside from the inner surface of the cylinder to the outer surface of the partially convex spherical shape is filled with a reinforcing material made of a compressed wire mesh, and a mesh of the wire mesh of the reinforcing material, and A heat-resistant material containing expanded graphite, phosphorus pentoxide and phosphate, mixed and compressed with a reinforcing material, and a partially convex spherical outer surface having heat resistance containing expanded graphite, phosphorus pentoxide and phosphate
- a spherical belt-like seal body is disclosed which is formed on a smooth surface where an outer surface layer of a material and a reinforcing material made of a wire mesh mixed and integrated with the outer surface layer are exposed.
- the spherical belt-shaped sealing body is filled with a reinforcing material made of a compressed wire mesh and a mesh of the reinforcing material mesh from the inner surface of the cylindrical surface to the outer surface of the partially convex spherical surface, and mixed with the reinforcing material. Since the heat-resistant material containing expanded graphite, phosphorus pentoxide, and phosphate that has been converted into a compressed shape is used, the oxidative exhaustion of expanded graphite, which is the main component of the heat-resistant material, at high temperatures is caused by oxidation of phosphorus pentoxide and phosphate. It is reduced even at a high temperature exceeding 600 ° C. due to the suppressing action, and as a result, the heat resistance of the spherical belt-shaped sealing body is improved.
- the heat resistance (oxidation resistance consumption) is higher than that of the seal body described in Patent Document 1 due to the oxidation-inhibiting action of phosphorus pentoxide and phosphate contained in the heat-resistant material. Property), and the weight reduction amount of the sealing body due to the oxidation consumption of the expanded graphite in the heat-resistant material was greatly improved.
- the heat resistance of the heat-resistant material containing expanded graphite for improving NVH is sufficient, and further improvement of heat resistance is required.
- the present inventors have effectively used the oxidation inhibiting action of phosphorus pentoxide and phosphate described in Patent Document 2 on expanded graphite, and the main component of the heat-resistant material. Focusing on expanded graphite, the heat resistance of the heat-resistant material itself is reduced by reducing the content of metal impurities and ash contained in the expanded graphite and the content of sulfur and increasing the graphite content (graphite purity). As a result, it has been found that even when used at a high temperature exceeding 600 ° C., it is possible to reduce weight loss due to oxidation consumption of the ball-shaped seal body.
- the present invention has been made on the basis of the above findings.
- the object of the present invention is to reduce oxidative consumption even when used at a high temperature exceeding 600 ° C., to reduce weight loss due to the oxidative consumption, and to seal characteristics.
- An object of the present invention is to provide a ball-seal seal body with improved performance.
- the spherical belt-shaped sealing body of the present invention includes a spherical belt-shaped substrate defined by a cylindrical inner surface, a partially convex spherical surface, and annular end surfaces on the large-diameter side and small-diameter side of the partially convex spherical surface, and a partially convex spherical surface of the spherical belt-shaped substrate.
- the expanded graphite in the heat-resistant material has an ash content of 0.1% by mass or less and a graphite content of 99.7% by mass. % Or more.
- ash is a residue obtained by heating metal impurities such as iron, calcium, silicon, aluminum and expanded graphite in high-temperature air (around 1000 ° C.) to completely burn carbon.
- metal impurities such as iron, calcium, silicon, aluminum and expanded graphite in high-temperature air (around 1000 ° C.) to completely burn carbon.
- Metal oxide oxides are generally referred to as silicon oxide, iron oxide, alumina and the like.
- the expanded graphite constituting the main component of the heat-resistant material has an ash content of 0.1% by mass or less and a graphite content of 99.7% by mass or more. Because of its high purity, the heat resistance of the expanded graphite itself is improved, and the oxidation depletion in a high temperature region exceeding 600 ° C. is suppressed by adding the oxidation inhibiting action of at least the phosphate contained therein. The weight reduction of the heat-resistant material due to the above is suppressed, and the sealing characteristics can be improved.
- the expanded graphite in the heat-resistant material may have an ash content of 0.1% by mass or less and a graphite content of 99.8% by mass or more.
- the expanded graphite in the heat-resistant material preferably has an ash content of 0.05% by mass or less, more preferably 0.01% by mass or less.
- the ash contained in the expanded graphite in the heat-resistant material is an impurity for the expanded graphite, so the smaller the content, the better the properties such as heat resistance and flexibility of the expanded graphite itself.
- the content is preferably 0 (zero).
- the content is 0.1% by mass or less, and most preferably 0.01% by mass or less.
- sulfur is 1700 mass ppm or less, preferably 1000 mass ppm or less, more preferably 500 mass ppm or less, more preferably 100 mass ppm or less, and still more preferably, in the expanded graphite in the heat-resistant material. You may contain in the ratio of 50 mass ppm or less.
- Sulfur is contained as residual sulfur in the production process of expanded graphite.
- a method for producing expanded graphite will be described.
- a 60% aqueous solution of hydrogen peroxide is added as an oxidant, and this is used as a reaction solution.
- the reaction solution is cooled and maintained at a temperature of 10 ° C., and a particle size of 30 to 80 mesh.
- suction filtration is performed to separate the acid-treated graphite, and the acid-treated graphite is stirred for several tens of minutes and suction filtered. Is repeated twice to sufficiently remove sulfuric acid from the acid-treated graphite.
- the acid-treated graphite from which sulfuric acid was sufficiently removed was dried for several hours in a drying furnace maintained at a temperature of 110 ° C., and this was used as the acid-treated graphite raw material.
- This acid-treated graphite raw material was treated in a furnace at a temperature of 1000 ° C. for 5 seconds to generate a decomposition gas, and expanded graphite layers were expanded by the gas pressure to produce graphite particles (expansion magnification of 240 times).
- the expanded graphite particles are compression molded or roll molded to produce an expanded graphite sheet having a desired thickness.
- an oxidizing solvent body such as sulfuric acid, nitric acid, or a mixed acid of sulfuric acid and nitric acid is used.
- nitric acid is used as this oxidizing solvent body, Residual sulfur is not produced, but the productivity of the acid-treated graphite raw material is poor.
- this expanded graphite containing residual sulfur is used for, for example, a sealing member (seal, packing, etc.) or a sliding member (bearing, etc.), there is no effect on heat resistance, but there is a problem of corrosion induced by residual sulfur. .
- the degree of corrosion due to residual sulfur varies depending on the content of residual sulfur. According to the experiments by the present inventors, if the content is 1700 mass ppm or less (0.17 mass% or less), It has been confirmed that if the content is 1000 ppm by mass or less, no troubles due to corrosion are caused. Since this sulfur is also an impurity with respect to expanded graphite, like the above ash, the smaller the content, the better the properties of the expanded graphite itself.
- the content is required as a ball-shaped seal body, particularly from the viewpoint of heat resistance, the content is 1700 mass ppm or less, preferably 1000 ppm by mass or less, more preferably 500 ppm by mass or less, still more preferably 100 ppm by mass or less, and most preferably 50 ppm by mass or less.
- the heat-resistant material contains at least 0.1 to 16% by mass, preferably 0.5 to 8% by mass of phosphate.
- the phosphate contained in the expanded graphite in the heat-resistant material exerts an action of suppressing the oxidative consumption of the expanded graphite at a high temperature.
- Phosphate includes primary lithium phosphate (LiH 2 PO 4 ), secondary lithium phosphate (Li 2 HPO 4 ), primary calcium phosphate [Ca (H 2 PO 4 ) 2 ], dibasic calcium phosphate (CaHPO 4 ), It may be selected from primary aluminum phosphate [Al (H 2 PO 4 ) 3 ] and secondary aluminum phosphate [Al 2 (HPO 4 ) 3 ].
- the heat-resistant material further contains 0.05 to 5% by mass, preferably 0.5 to 3% by mass of phosphorus pentoxide, which, together with the phosphate, exerts an action of suppressing the oxidative exhaustion of expanded graphite at a high temperature.
- Phosphorus pentoxide is orthophosphoric acid (H 3 PO 4 ), metaphosphoric acid (HPO 3 ), polyphosphoric acid, specifically pyrophosphoric acid (H 4 P 2 O 7 ), tripolyphosphoric acid (H 5 P 8 O 10 ), etc.
- These phosphoric acids are contained in the expanded graphite in the form of phosphorus pentoxide (P 2 O 5 ) by the dehydration reaction of phosphoric acid.
- the outer surface of the outer layer integrally formed on the partially convex spherical surface of the spherical belt-shaped sealing body is a smooth surface of a heat-resistant material containing expanded graphite and phosphate or phosphate and phosphorus pentoxide.
- the outer surface of the outer layer may be formed on a smooth surface in which a surface made of a reinforcing material and a surface of expanded graphite and a heat-resistant material containing phosphate or phosphate and phosphorus pentoxide are mixed. May be.
- the outer surface of the outer layer formed integrally with the partially convex spherical surface of this spherical belt-shaped seal body is a part that becomes a sliding surface as well as a sealing surface with the mating material of the spherical pipe joint, From the viewpoint of suppressing the formation of an excessive film of the heat-resistant material on the surface of the mating material and smooth sliding contact with the surface of the mating material, the latter is composed of a surface made of the reinforcing material and the heat-resistant material. It is preferable to form on a smooth surface mixed with the surface.
- a spherical belt-shaped sealing body includes a spherical inner surface defined by a cylindrical inner surface, a partially convex spherical surface, and annular end surfaces on the large-diameter side and small-diameter side of the partially convex spherical surface, and the spherical belt-shaped substrate.
- An outer layer integrally formed on the partially convex spherical surface, and the ball-shaped base is filled with a reinforcement made of a wire mesh and a mesh of the reinforcement mesh, and mixed with this reinforcement.
- expanded expanded graphite and a heat-resistant material including phosphate or phosphate and phosphorus pentoxide and the outer layer includes expanded graphite and a heat-resistant material including phosphate or phosphate and phosphorus pentoxide;
- the expanded graphite in the heat resistant material has an ash content of 0.1% by mass or less, and the graphite content is less than 0.1% by mass. In another embodiment, the content of graphite is 99.8% by mass or more. %,
- the graphite purity of the expanded graphite in the heat-resistant material is increased, so that the heat resistance of the expanded graphite itself is improved, and this is caused by phosphate or phosphate and phosphorus pentoxide.
- a ball-shaped seal body in which a reduction in weight of a heat-resistant material due to oxidation consumption is reduced and seal characteristics can be improved as a result of the oxidation-suppressing action being added to reduce oxidation consumption of the heat-resistant material at a high temperature. Can do.
- FIG. 1 is a longitudinal sectional view of a ball-shaped seal body manufactured in an example of an embodiment of the present invention
- FIG. 2 is a partially enlarged cross-sectional view of the ball-shaped seal body shown in FIG.
- FIG. 3 is an explanatory view of a method for forming a reinforcing material in the manufacturing process of the ball-shaped seal body of the present invention
- FIG. 4 is a perspective view of the heat-resistant material in the manufacturing process of the ball-shaped seal body of the present invention
- FIG. 5 is a plan view showing a wire mesh of a reinforcing material
- FIG. 6 is a perspective view of a polymer in the production process of the spherical belt-shaped sealing body of the present invention
- FIG. 1 is a longitudinal sectional view of a ball-shaped seal body manufactured in an example of an embodiment of the present invention
- FIG. 2 is a partially enlarged cross-sectional view of the ball-shaped seal body shown in FIG.
- FIG. 3 is an explanatory view
- FIG. 7 is a plan view of a cylindrical base material in the manufacturing process of the ball-shaped seal body of the present invention
- FIG. 8 is a longitudinal sectional view of the cylindrical base material shown in FIG.
- FIG. 9 is an explanatory view of a method for forming an outer layer forming member in the manufacturing process of the spherical belt-shaped sealing body of the present invention
- FIG. 10 is an explanatory diagram of a method for forming an outer layer forming member in the manufacturing process of the ball-shaped seal body of the present invention
- FIG. 11 is a cross-sectional view of the outer layer forming member in the manufacturing process of the ball-shaped seal body of the present invention
- FIG. 12 is a plan view of a pre-cylindrical molded body in the manufacturing process of the ball-shaped seal body of the present invention
- FIG. 13 is a longitudinal sectional view showing a state in which a preliminary cylindrical molded body is inserted into a mold in the manufacturing process of the spherical belt-shaped sealing body of the present invention
- FIG. 14 is a longitudinal sectional view of an exhaust pipe spherical joint incorporating the ball-shaped seal body of the present invention
- FIG. 15 is an explanatory diagram of an exhaust system of an automobile engine.
- the ball-shaped seal body of the present invention will be described based on the manufacturing process.
- the mesh width formed by knitting metal thin wires having a wire diameter of 0.28 to 0.32 mm in a cylindrical shape is about 4 to 6 mm in length and about 3 to 5 mm in width (FIG. 5) is passed between the rollers 2 and 3, a belt-like metal mesh 4 having a predetermined width D is produced, and a reinforcing material 5 obtained by cutting the belt-like metal mesh 4 into a predetermined length L is prepared.
- the width d of the reinforcing material 5 has a width d of (1.10 to 2.10) ⁇ D, and the length L of the reinforcing material 5 ( 1.
- Heat-resistant material 6 having a length l of 1.30 to 2.70) ⁇ L, a density of about 1.0 to 1.15 Mg / m 3 and a thickness of about 0.30 to 0.60 mm is prepared. To do.
- the heat-resistant material 6 contains expanded graphite and a predetermined amount of phosphate or a predetermined amount of phosphate and phosphorus pentoxide.
- the heat-resistant material is a maximum of (0.10 to 0.80) ⁇ D from one end edge 7 in the width direction of the reinforcing member 5 which becomes the annular end surface 30 on the large diameter side of the partially convex spherical surface 29.
- the polymer 12 is spirally wound with the heat-resistant material 6 inside, and wound so that the heat-resistant material 6 is increased once, both on the inner and outer peripheral sides.
- the cylindrical base material 13 with the heat-resistant material 6 exposed is formed.
- the heat-resistant material 6 the number of windings of the heat-resistant material 6 in the cylindrical base material 13 is larger than the number of windings of the reinforcing material 5.
- Those having a length l of 70 ⁇ L are prepared in advance.
- the heat-resistant material 6 protrudes from the one edge 7 of the reinforcing material 5 by ⁇ 1 in the width direction on one edge side in the width direction.
- ⁇ 2 protrudes from the other end edge 8 of the reinforcing member 5 in the width direction.
- a cylindrical wall surface 20, a partially concave spherical wall surface 21 continuous with the cylindrical wall surface 20, and a through hole 22 continuous with the partially concave spherical wall surface 21 are provided on the inner surface, and the stepped core 23 is fitted into the through hole 22.
- a mold 26 as shown in FIG. 13 in which a hollow cylindrical portion 24 and a spherical hollow portion 25 continuous with the hollow cylindrical portion 24 are formed is prepared, and the outer periphery of the stepped core 23 of the mold 26 is prepared.
- the preliminary cylindrical molded body 19 is inserted into the surface.
- the pre-cylindrical molded body 19 disposed in the hollow cylindrical portion 24 and the spherical belt-shaped hollow portion 25 of the mold 26 is compression-molded at a pressure of 98 to 294 N / mm 2 (1 to 3 ton / cm 2 ) in the core axial direction.
- a through hole 27 is provided in the central portion, a cylindrical inner surface 28, a partially convex spherical surface 29, and large and small diameter annular end surfaces 30 and 31 of the partially convex spherical surface 29.
- the ball-shaped base 32 is configured such that the heat-resistant material 6 and the reinforcing material 5 are compressed together and intertwined to have structural integrity, and the outer layer 33 is formed from the heat-resistant material 6 and the wire mesh.
- the reinforcing material 5 is compressed and filled with the heat-resistant material 6 in the mesh of the reinforcing material 5 so that the heat-resistant material 6 and the reinforcing material 5 are mixed and integrated, and the outer surface 35 of the outer layer 33 is The surface 36 made of the reinforcing material 5 and the surface 37 made of the heat-resistant material 6 are formed on a smooth surface 38.
- the ball-shaped base 32 and the outer layer 33 of the produced ball-shaped seal body 34 contain the reinforcing material 5 made of wire mesh in a proportion of 40 to 65% by mass and the heat-resistant material 6 in a proportion of 35 to 60% by mass.
- the heat-resistant material 6 in the spherical base 32 and the outer layer 33 has a density of 1.20 to 2.00 Mg / m 3 .
- the outer layer 33 contains the reinforcing material 5 made of a wire mesh in a proportion of 60 to 75% by mass and the heat-resistant material 6 in a proportion of 25 to 40% by mass.
- the heat-resistant material 6 and the reinforcing material 5 are overlapped with the reinforcing material 5 obtained by cutting the belt-shaped wire mesh 4 into a predetermined length L and both are compression-molded in the thickness direction.
- the sheet material is formed by filling the mesh of the reinforcing material 5 with the heat-resistant material 6 and exposing only the heat-resistant material 6 on one surface and exposing only the reinforcing material 5 on the other surface. It may be used as the flat outer layer forming member 18.
- the sheet material is wound around the outer peripheral surface of the cylindrical base material 13 with the surface where only the heat-resistant material 6 is exposed, and by compression molding in the seventh step, the spherical base 32
- the heat-resistant material 6 and the reinforcing material 5 are compressed to each other and entangled with each other to have structural integrity.
- the outer layer 33 the heat-resistant material 6 and the reinforcing material 5 are compressed and the reinforcing material 5 is compressed.
- the wire mesh may be filled with the heat-resistant material 6, and the outer surface 35 of the outer layer 33 may be formed into a spherical surface-shaped sealing body 34 formed on a smooth surface made of the heat-resistant material 6.
- the heat-resistant material 6 contains expanded graphite and phosphate or phosphate and phosphorus pentoxide, which are main components.
- the expanded graphite constituting the main component has a graphite content (graphite purity) of 99.7% by mass or more, preferably 99.8% by mass or more.
- the expanded graphite contains ash in an amount of 0.1% by mass or less, preferably 0.05% by mass or less, and more preferably 0.01% by mass or less.
- the expanded graphite contains sulfur in a proportion of 1700 ppm by mass or less, preferably 1000 ppm by mass or less, more preferably 500 ppm by mass or less, still more preferably 100 ppm by mass or less, and even more preferably 50 ppm by mass or less.
- the amount of graphite content in expanded graphite is related to the level of graphite purity, and the higher the purity, the higher the properties as expanded graphite. Since the graphite content in the expanded graphite is 99.7% by mass or more, and preferably 99.8% by mass or more, it is sufficient from the viewpoints of heat resistance, sealing properties, and wear resistance required for the ball-shaped seal body.
- the phosphate or phosphate and phosphorus pentoxide contained in the heat-resistant material 6 exhibit an oxidation-inhibiting action on the expanded graphite.
- the phosphate is 0.1 to 16% by mass in the heat-resistant material 6, preferably 0.
- the phosphorus pentoxide is contained in the heat-resistant material 6 in an amount of 0.05 to 5% by mass, preferably 0.5 to 3% by mass.
- phosphate examples include primary lithium phosphate (LiH 2 PO 4 ), secondary lithium phosphate (Li 2 HPO 4 ), primary calcium phosphate [Ca (H 2 PO 4 ) 2 ], and secondary calcium phosphate (CaHPO 4 ). , First aluminum phosphate [Al (H 2 PO 4 ) 3 ] and second aluminum phosphate [Al 2 (HPO 4 ) 3 ].
- Phosphorus pentoxide is orthophosphoric acid (H 3 PO 4 ), metaphosphoric acid (HPO 3 ), polyphosphoric acid, specifically pyrophosphoric acid (H 4 P 2 O 7 ), tripolyphosphoric acid (H 5 P 8 O 10).
- Etc. which are selected from cyclic condensed phosphoric acid such as trimetaphosphoric acid, tetrametaphosphoric acid and the like, and are usually used in the form of an aqueous solution together with acid-treated graphite powder in the production process of expanded graphite.
- phosphoric acids are contained in the expanded graphite in the form of phosphorus pentoxide (P 2 O 5 ) by the dehydration reaction of phosphoric acid.
- the effect of suppressing oxidation against expanded graphite is not sufficiently exhibited.
- the above effects are not preferably exhibited.
- the content of phosphorus pentoxide is less than 0.05% by mass, the oxidation inhibiting action on the expanded graphite in the heat-resistant material 6 is not sufficiently exhibited as in the case of the phosphate, and the content is more than 5% by mass.
- the effect of suppressing oxidation against expanded graphite is not preferably exhibited.
- the heat-resistant material 6 forming the spherical belt-shaped sealing body 34 has an ash content of 0.1% by mass or less, preferably 0.05% by mass or less, more preferably 0.01% by mass or less, Expanded graphite having a graphite content of 99.7% by mass or more, preferably 99.8% by mass or more, 0.1 to 16% by mass phosphate or 0.1 to 16% by mass phosphate and 0.05 to 5% by mass of phosphorus pentoxide, and the expanded graphite in the heat-resistant material 6 has a very low ash content, extremely high graphite purity, and enhanced properties such as heat resistance of the expanded graphite itself.
- the heat resistance and the like of the heat-resistant material 6 are enhanced by the action of suppressing the oxidation of the phosphate or phosphate and phosphorus pentoxide in the heat-resistant material 6 to the expanded graphite.
- Reinforcing material 5 is austenitic SUS304, SUS310S, SUS316, ferritic SUS430, or the like, iron-based (JIS G3532) or galvanized iron wire (JIS 3547), and copper-based copper-nickel alloy (white copper).
- a wire mesh formed by weaving or knitting using one or more fine wires made of copper-nickel-zinc alloy (white and white), brass, and beryllium copper is used.
- the wire diameter of the fine metal wire forming the wire mesh is preferably about 0.15 to 0.32 mm, and the wire mesh of about 3 to 6 mm is preferably used.
- a so-called expanded metal in which a notch is made in a stainless steel thin plate or a phosphor bronze thin plate and at the same time the notch is widened to form a regular mesh row can be used.
- the thickness of the stainless steel sheet and phosphor bronze sheet is preferably about 0.3 to 0.5 mm.
- the tubular base material 13 instead of forming the tubular base material 13 by winding it in a spiral shape with the heat-resistant material 6 on the inside, it is wound in a spiral shape with the reinforcing material 5 consisting of the belt-shaped wire mesh 4 inside.
- the base material 13 it is possible to produce a sphere-shaped seal body 34 in which the reinforcing material 5 made of a wire mesh is exposed on the cylindrical inner surface 28 of the sphere-shaped substrate 32.
- the spherical belt-like seal body 34 is used by being incorporated in the exhaust pipe spherical joint shown in FIG. That is, in the exhaust pipe spherical joint shown in FIG. 14, a flange 200 is erected on the outer peripheral surface of the upstream exhaust pipe 100 connected to the engine side, leaving the pipe end portion 101.
- the ball-shaped seal body 34 is fitted and fixed on the cylindrical inner surface 28 that defines the through-hole 27, and the ball-shaped seal body 34 is abutted against the flange 200 on the large-diameter annular end surface 30 and is seated.
- the downstream exhaust pipe 300 arranged opposite to the upstream exhaust pipe 100 and connected to the muffler side is integrally provided with a concave spherical portion 302 and a flange portion 303 connected to the concave spherical portion 302.
- the inner surface 304 of the concave spherical surface 302 is fixed to the outer surface 33 of the outer layer 33 of the spherical belt-shaped sealing body 34 and the surface 36 made of the reinforcing material 5 and the surface made of the heat-resistant material 6. 7 and are in sliding contact with the smooth surface 37 made of heat-resistant material 6 in the outer surface 35 of the smooth surface 38 or outer layer 33 of the spherical annular seal member 34 together.
- a pair of bolts 400 having one end fixed to the flange 200 and the other end inserted through the flange portion 303 of the enlarged diameter portion 301 and the enormous head and flange portion of the bolt 400.
- a spring force is always applied to the downstream side exhaust pipe 300 in the direction of the upstream side exhaust pipe 100 by the pair of coil springs 500 arranged between 303.
- the exhaust pipe spherical joint has a smooth surface 38 or a smooth surface 37 as a sliding surface of the outer layer 33 of the ball-shaped seal body 34 with respect to the relative angular displacement generated in the upper and downstream exhaust pipes 100 and 300. It is configured to allow this by sliding contact with the inner surface 304 of the concave spherical surface portion 302 of the enlarged diameter portion 301 formed at the end of the downstream side exhaust pipe 300.
- Examples 1-6 Using one austenitic stainless steel wire (SUS304) with a wire diameter of 0.28 mm as a thin metal wire, a cylindrical braided wire net having a mesh width of 4 mm and a width of 5 mm is produced, and this is placed between a pair of rollers. A belt-like wire mesh was used as a reinforcing material for a spherical belt-like substrate.
- SUS304 austenitic stainless steel wire
- a belt-like wire mesh was used as a reinforcing material for a spherical belt-like substrate.
- An expanded graphite sheet having a thickness of 12 Mg / m 3 and a thickness of 0.38 mm was used.
- the outer layer forming member was wound around the outer peripheral surface of the cylindrical base material to prepare a preliminary cylindrical molded body.
- the preliminary cylindrical molded body was inserted into the outer peripheral surface of the stepped core of the mold, and the preliminary cylindrical molded body was disposed in the hollow portion of the mold.
- a pre-cylindrical molded body placed in the hollow part of the mold is compression-molded with a pressure of 294 N / mm 2 (3 ton / cm 2 ) in the core axial direction, and has a through-hole in the central part and a cylindrical inner surface and partially convex spherical
- a spherical belt-like seal body comprising Example 1 to Example 6 provided with an outer layer integrally formed on the surface was obtained.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and intertwined with each other to have structural integrity.
- a heat-resistant material composed of graphite and primary aluminum phosphate, and the outer layer includes a heat-resistant material having an ash content of 0.01% by mass and a graphite content of 99.99% by mass, and a reinforcing material for the outer layer composed of a wire mesh.
- a reinforcing material made of a wire mesh is 57.8 to 58.1% by mass of a heat resistant material made of expanded graphite and primary aluminum phosphate. 41.9% to 42.2% by mass of the material, the density of the heat-resistant material in the spherical belt-shaped substrate and the outer layer is 1.62 Mg / m 3 , and the weight of the spherical belt-shaped sealing body is 40. It was 3 to 41.0 g.
- Examples 7-9 As the reinforcing material, the same reinforcing material for the ball-shaped substrate and the reinforcing material for the outer layer were used as in Example 1.
- expanded graphite having an ash content of 0.1% by mass and a graphite content of 99.9% by mass, 1.0 to 8.0% by mass of primary aluminum phosphate as a phosphate, phosphorus pentoxide
- An expanded graphite sheet having a density of 1.12 Mg / m 3 and a thickness of 0.38 mm was used.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and entangled with each other to have structural integrity.
- the heat-resistant material made of graphite, primary aluminum phosphate and phosphorus pentoxide, and the reinforcing material for the outer layer made of wire mesh are compressed, and the heat-resistant material is filled in the mesh of the reinforcing material mesh, and the heat-resistant material and the reinforcing material are mixed.
- the outer surface of the outer layer is made of a reinforcing material. That the surface and the surface constituted by the heat-resistant material was prepared spherical annular seal member which is formed into a smooth surface which is mixed.
- the reinforcing material made of wire mesh is in the proportion of 57.5 to 58.1% by mass, expanded graphite, phosphorus pentoxide and primary aluminum phosphate.
- the density of the heat-resistant material in the spherical belt-shaped substrate and the outer layer is 1.63 Mg / m 3 , and the heat-resistant material is composed of 41.9 to 42.5% by mass. The weight was 40.3-41.4 g.
- Examples 10-12 As the reinforcing material, the same reinforcing material for the ball-shaped substrate and the reinforcing material for the outer layer were used as in Example 1.
- expanded graphite having an ash content of 0.05% by mass and a graphite content of 99.95% by mass, 1.0 to 8.0% by mass of primary aluminum phosphate as a phosphate, phosphorus pentoxide Is an expanded graphite sheet having a density of 1.12 Mg / m 3 and a thickness of 0.38 mm.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and entangled with each other to have structural integrity.
- a heat-resistant material made of graphite, primary aluminum phosphate and phosphorus pentoxide and a reinforcing material for the outer layer made of a wire mesh are compressed, and the heat-resistant material is filled in the mesh of the reinforcing material mesh, and the heat-resistant material and the reinforcing material are mixed.
- the outer surface of the outer layer is integrated To prepare a spherical annular seal member and the surface consisting of the surface and the heat-resistant material composed of reinforcing material is formed into a smooth surface which is mixed.
- the reinforcing material made of a wire mesh is in a ratio of 57.9 to 58.2% by mass, expanded graphite, phosphorus pentoxide and primary aluminum phosphate.
- the density of the heat-resistant material in the spherical base and the outer layer is 1.62 Mg / m 3 , and the heat-resistant material is composed of 41.8 to 42.1% by mass. The weight was 40.2-40.9 g.
- Examples 13-15 As the reinforcing material, the same reinforcing material for the ball-shaped substrate and the reinforcing material for the outer layer were used as in Example 1.
- expanded graphite having an ash content of 0.01% by mass and a graphite content of 99.99% by mass, 1.0-8.0% by mass of primary aluminum phosphate as a phosphate, phosphorus pentoxide Is an expanded graphite sheet having a density of 1.12 Mg / m 3 and a thickness of 0.38 mm.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and entangled with each other to have structural integrity.
- the heat-resistant material made of expanded graphite, aluminum monophosphate and phosphorus pentoxide, and the outer layer reinforcing material made of wire mesh are compressed, and the heat-resistant material is filled in the mesh of the reinforcing wire mesh.
- the outer surface of the outer layer is mixed and integrated. It was prepared spherical annular seal member and the surface consisting of the surface and the heat-resistant material composed of reinforcing material is formed into a smooth surface which is mixed.
- the reinforcing material made of wire mesh is in the ratio of 56.6 to 58.4% by mass, expanded graphite, phosphorus pentoxide and primary aluminum phosphate.
- the density of the heat-resistant material in the spherical belt-shaped substrate and the outer layer is 1.61 Mg / m 3 , and the heat-resistant material is composed of 41.6 to 43.3% by mass. The weight was 40.9-41.3 g.
- Examples 16-18 As the reinforcing material, the same reinforcing material for the ball-shaped substrate and the reinforcing material for the outer layer were used as in Example 1.
- expanded graphite having an ash content of 0.1 mass%, a sulfur content of 1000 mass ppm (0.1 mass%), and a graphite content of 99.8 mass% is used as a phosphate.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and entangled with each other to have structural integrity.
- a reinforcing material for a spherical belt-shaped substrate made of a wire mesh, and a compressed ash content of 0.1% by mass, a sulfur content that is filled and integrated with the wire mesh of this reinforcing material It has expanded graphite with a graphite content of 99.8 mass% at 1000 mass ppm, and a heat-resistant material made of primary aluminum phosphate and phosphorus pentoxide, and the outer layer has an ash content of 0.1 mass% and a sulfur content Expanded graphite having an amount of 1000 mass ppm and a graphite content of 99.8 mass%, a heat-resistant material made of primary aluminum phosphate and phosphorus pentoxide, and a reinforcing material for an outer layer made of a wire mesh are compressed to form a mesh of the reinforcement mesh Is filled with heat-resistant material A heat seal material and a reinforcing material are mixed and integrated, and the outer surface of the outer layer is formed into a spherical surface seal body formed with
- the produced spherical band-shaped substrate of Example 16 to Example 18 and the outer layer have a reinforcing material made of wire mesh in a proportion of 57.5 to 58.1% by mass, expanded graphite, phosphorus pentoxide and primary aluminum phosphate. And a density of the heat-resistant material in the spherical base and the outer layer is 1.62 Mg / m 3 . The weight was 40.3-40.9 g.
- Examples 19-21 As the reinforcing material, the same reinforcing material for the ball-shaped substrate and the reinforcing material for the outer layer were used as in Example 1.
- expanded graphite having an ash content of 0.01 mass%, a sulfur content of 200 massppm (0.02 mass%), and a graphite content of 99.97 mass% is used as a phosphate.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and entangled with each other to have structural integrity.
- a reinforcing material for a spherical belt-shaped substrate made of a wire mesh, and a compressed ash content of 0.01% by mass, a sulfur content that is filled and integrated with the wire mesh of the reinforcing material It has expanded graphite having a graphite content of 99.97% by mass at 200 mass ppm, and a heat-resistant material composed of primary aluminum phosphate and phosphorus pentoxide, and the outer layer has an ash content of 0.01% by mass and contains sulfur Expanded graphite having an amount of 200 mass ppm and a graphite content of 99.97 mass%, a heat-resistant material made of primary aluminum phosphate and phosphorus pentoxide, and a reinforcing material for an outer layer made of a wire mesh are compressed to form a mesh of the reinforcement mesh Filled with heat-resistant material The heat-resistant material and the reinforcing material are mixed and integrated, and the outer surface of the outer layer is a spherical belt-shaped sealing body formed on
- the reinforcing material made of wire mesh is 57.4 to 58.1% by mass of expanded graphite, phosphorus pentoxide and primary aluminum phosphate.
- the density of the heat-resistant material in the spherical belt-shaped substrate and the outer layer is 1.62 Mg / m 3 , and the heat-resistant material is composed of 41.9 to 42.6% by mass. The weight was 40.3-40.8 g.
- Examples 22-24 As the reinforcing material, the same reinforcing material for the ball-shaped substrate and the reinforcing material for the outer layer were used as in Example 1.
- expanded graphite having an ash content of 0.01% by mass, a sulfur content of 50 ppm by mass (0.005% by mass), and a graphite content of 99.985% by mass is used as a phosphate.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and entangled with each other to have structural integrity.
- the reinforcing material made of wire mesh is in the proportion of 57.1 to 58.1% by mass, expanded graphite, phosphorus pentoxide and primary aluminum phosphate.
- the density of the heat-resistant material in the spherical belt-shaped substrate and the outer layer is 1.62 Mg / m 3 , and the heat-resistant material is composed of 41.9 to 42.9% by mass. The weight was 40.3-41.0 g.
- expanded graphite having an ash content of 2.80 mass%, a sulfur content of 1200 mass ppm (0.12 mass%), and a graphite content of 97.08 mass% is used as a phosphate.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and entangled with each other to have structural integrity.
- Heat-resistant material made of expanded graphite having a mass content of 1200 mass ppm and graphite content of 97.08 mass%, primary aluminum phosphate and phosphorus pentoxide, and reinforcing material for the outer layer made of wire mesh are heat-resistant to the wire mesh of the reinforcing material.
- the material is filled A heat-resistant material and a reinforcing material are mixed and integrated, and the outer surface of the outer layer is formed into a spherical belt-shaped seal body formed with a smooth surface in which a surface made of a reinforcing material and a surface made of a heat-resistant material are mixed. did.
- the reinforcing material made of a wire mesh is 57.9 to 58.1% by mass of expanded graphite, phosphorus pentoxide and primary aluminum phosphate.
- the density of the heat-resistant material in the spherical belt-shaped substrate and the outer layer is 1.62 Mg / m 3 , and the heat-resistant material is composed of 41.9 to 42.1% by mass. The weight was 40.3-40.8 g.
- Comparative Examples 4-6 As the reinforcing material, the same reinforcing material for the ball-shaped substrate and the reinforcing material for the outer layer were used as in Example 1.
- expanded graphite having an ash content of 1.0 mass%, a sulfur content of 1000 mass ppm (0.1 mass%), and a graphite content of 98.9 mass% is used as a phosphate.
- the spherical belt-shaped substrate is configured such that the heat-resistant material and the reinforcing material for the spherical belt-shaped substrate made of a wire mesh are compressed and entangled with each other to have structural integrity.
- Heat-resistant material made of expanded graphite having 1000 ppm by mass and graphite content of 98.9% by mass, primary aluminum phosphate and phosphorus pentoxide, and reinforcing material for the outer layer made of wire mesh are heat-resistant to the wire mesh of the reinforcing material
- the material is filled with the heat resistance
- the reinforcing member is being mixed integral with, the outer surface of the outer layer was prepared spherical annular seal member and the surface consisting of the surface and the heat-resistant material composed of reinforcing material is formed into a smooth surface which is mixed.
- a reinforcing material made of wire mesh is 58.1% by mass
- the heat resistance is made of expanded graphite, phosphorus pentoxide, and primary aluminum phosphate. 41.9 to 41.9% by mass
- the density of the heat-resistant material in the spherical base and the outer layer is 1.62 Mg / m 3
- the weight of the spherical seal is 40.3 to 41. 4%. It was 0 g.
- ⁇ Test method> At room temperature (25 ° C), the temperature is raised to 700 ° C while continuing the oscillating motion of ⁇ 2.5 ° with an excitation frequency of 5 Hz, and the oscillating motion is continued while maintaining the temperature. The amount of gas leakage when the number of times reaches 1 million times is measured.
- the weight loss of the ball-shaped seal body is evaluated by measuring the weight of the ball-shaped seal body before the start of the above test and the weight of the ball-shaped seal body after the test (after the number of swings of 1 million times), and using the weight reduction rate. did.
- Tables 1 to 4 show the test results of the ball-shaped seal bodies of Examples 1 to 24, and Table 5 shows the test results of the ball-shaped seal bodies of Comparative Examples 1 to 6.
- the ball-shaped seal body has a weight reduction rate of 6.0% or less due to oxidation consumption even under a high temperature condition of 700 ° C.
- expanded graphite having an ash content of 0.01% by mass and a graphite content of 99.9% by mass or more, or an ash content of 0.01% by mass, a sulfur content of 0.005% by mass (50 ppm by mass), and a graphite content Spheres of Examples 13 to 15 or Examples 22 to 24 using heat-resistant materials containing 1 to 8% by mass of phosphate and 1% by mass of phosphorus pentoxide in expanded graphite having an amount of 99.9% by mass or more, respectively.
- the weight reduction rate of the spherical strip-shaped sealing body due to oxidative consumption showed an extremely low value of 4.0% or less.
- the ball-band seal bodies of Examples 1 to 24 are 1 / of the gas leak amount of the ball-shaped seal body of the comparative example. A value of 2 or less was shown, which was a result superior to the ball-shaped seal body of the comparative example.
- the quality of the heat resistance of the expanded graphite itself is determined by the amount of ash content contained in the expanded graphite in the heat-resistant material, and the ash content contained in the expanded graphite is 0.1. It has been found that the effect on heat resistance is most enhanced at a mass% or less, most preferably at 0.01 mass% or less (including zero).
- the ball-shaped seal body of the present invention can reduce the weight loss due to oxidation consumption even when used in a high temperature region, and the ball-band seal is caused by the weight decrease of the ball-shaped seal body.
- the sliding contact portion between the outer surface of the outer layer of the body and the inner surface of the concave spherical portion of the enlarged diameter portion of the exhaust pipe, and the contact portion between the annular end surface of the large-diameter side of the ball-shaped seal body and the flange standing on the exhaust pipe It is possible to improve the degree of sealing that occurs and reduce the amount of gas leakage from the site.
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Abstract
Description
金属細線として線径0.28mmのオーステナイト系ステンレス鋼線(SUS304)を一本使用して網目の目幅が縦4mm、横5mmの円筒状編組金網を作製し、これを一対のローラ間にとおして帯状金網とし、これを球帯状基体用の補強材とした。
補強材として、前記実施例1と同様の球帯状基体用の補強材及び外層用の補強材を使用した。
補強材として、前記実施例1と同様の球帯状基体用の補強材及び外層用の補強材を使用した。
補強材として、前記実施例1と同様の球帯状基体用の補強材及び外層用の補強材を使用した。
補強材として、前記実施例1と同様の球帯状基体用の補強材及び外層用の補強材を使用した。
補強材として、前記実施例1と同様の球帯状基体用の補強材及び外層用の補強材を使用した。
補強材として、前記実施例1と同様の球帯状基体用の補強材及び外層用の補強材を使用した。
補強材として、前記実施例1と同様の球帯状基体用の補強材及び外層用の補強材を使用した。
補強材として、前記実施例1と同様の球帯状基体用の補強材及び外層用の補強材を使用した。
コイルバネの押圧力(スプリングセットフォース):980N
揺動角度:±2.5°
加振周波数(揺動速度):5ヘルツ(Hz)
温度(図14に示す凹球面部302の外表面温度):室温(25℃)~700℃
揺動回数:100万回
相手材(図14に示す径拡大部301の材質):SUS304
室温(25℃)において5Hzの加振周波数で±2.5°の揺動運動を継続しながら700℃の温度まで昇温し、その温度を保持した状態で揺動運動を継続し、揺動回数が100万回に到達した時点でのガス漏れ量を測定する。
図14に示す排気管球面継手の一方の排気管100の開口部を閉塞し、他方の排気管300側から、0.049MPa(0.5kgf/cm2)の圧力で乾燥空気を流入し、継手部分(球帯状シール体34の外表面35と径拡大部301との摺接部、球帯状シール体34の円筒内面28と排気管100の管端部101との嵌合部及び大径側の環状端面30と排気管100に立設されたフランジ200との当接部)からのガス漏れ量を流量計にて、(1)試験初期、(2)揺動回数25万回後、(3)揺動回数50万回後及び(4)揺動回数100万回後の4回測定する。
5 補強材
6 耐熱材
12 重合体
13 筒状母材
18 外層形成部材
19 予備円筒成形体
26 金型
28 円筒内面
29 部分凸球面状面
30 大径側の環状端面
31 小径側の環状端面
32 球帯状基体
33 外層
34 球帯状シール体
Claims (14)
- 円筒内面、部分凸球面状面並びに部分凸球面状面の大径側及び小径側の環状端面により規定される球帯状基体と、この球帯状基体の部分凸球面状面に一体的に形成された外層とを備えた、排気管継手に用いられる球帯状シール体であって、球帯状基体は、金網からなる補強材と、この補強材の金網の網目を充填し、かつこの補強材と混在一体化されていると共に圧縮された膨張黒鉛及び少なくとも燐酸塩を含む耐熱材とを具備しており、外層は、膨張黒鉛及び少なくとも燐酸塩を含む耐熱材とこの耐熱材に混在一体化された金網からなる補強材とを有しており、該耐熱材中の膨張黒鉛は、灰分の含有量が0.1質量%以下であって黒鉛の含有量が99.7質量%以上であることを特徴とする球帯状シール体。
- 該耐熱材中の膨張黒鉛は、灰分の含有量が0.1質量%以下であって黒鉛の含有量が99.8質量%以上である請求項1に記載の球帯状シール体。
- 耐熱材中の膨張黒鉛は、灰分の含有量が0.05質量%以下である請求項1又は2に記載の球帯状シール体。
- 耐熱材中の膨張黒鉛は、灰分の含有量が0.01質量%以下である請求項1から3のいずれか一項に記載の球帯状シール体。
- 耐熱材中の膨張黒鉛は、硫黄を0.17質量%以下(1700質量ppm以下)の割合で含有する請求項1から4のいずれか一項に記載の球帯状シール体。
- 耐熱材中の膨張黒鉛は、硫黄を0.1質量%以下(1000質量ppm以下)の割合で含有する請求項1から5のいずれか一項に記載の球帯状シール体。
- 耐熱材中の膨張黒鉛は、硫黄を0.01質量%以下(100質量ppm以下)の割合で含有する請求項1から6のいずれか一項に記載の球帯状シール体。
- 耐熱材中の膨張黒鉛は、硫黄を0.005質量%以下(50質量ppm以下)の割合で含有する請求項1から7のいずれか一項に記載の球帯状シール体。
- 耐熱材は、燐酸塩を0.1~16質量%の割合で含有する請求項1から8のいずれか一項に記載の球帯状シール体。
- 耐熱材は、五酸化燐を0.05~5質量%及び燐酸塩を0.1~16質量%の割合で含有する請求項1から9のいずれか一項に記載の球帯状シール体。
- 外層の外表面は、膨張黒鉛と燐酸塩とを含む耐熱材の平滑な面に形成されている請求項1から10のいずれか一項に記載の球帯状シール体。
- 外層の外表面は、膨張黒鉛と燐酸塩及び五酸化燐とを含む耐熱材の平滑な面に形成されている請求項1から10のいずれか一項に記載の球帯状シール体。
- 外層の外表面は、補強材からなる面と膨張黒鉛及び燐酸塩を含む耐熱材の面とが混在した平滑な面に形成されている請求項1から10のいずれか一項に記載の球帯状シール体。
- 外層の外表面は、補強材からなる面と膨張黒鉛、燐酸塩及び五酸化燐を含む耐熱材の面とが混在した平滑な面に形成されている請求項1から10のいずれか一項に記載の球帯状シール体。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/816,566 US9091381B2 (en) | 2010-08-19 | 2011-07-28 | Spherical annular seal member |
CN201180039714.8A CN103080617B (zh) | 2010-08-19 | 2011-07-28 | 球形环密封件 |
CA2807118A CA2807118C (en) | 2010-08-19 | 2011-07-28 | Spherical annular seal member |
EP11817895.3A EP2607755B1 (en) | 2010-08-19 | 2011-07-28 | Sphered-band sealing object |
BR112013002407-0A BR112013002407B1 (pt) | 2010-08-19 | 2011-07-28 | Membro de vedação anular esférico. |
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JP2010184406 | 2010-08-19 | ||
JP2010-184406 | 2010-08-19 | ||
JP2010-223824 | 2010-10-01 | ||
JP2010223824A JP5760364B2 (ja) | 2010-08-19 | 2010-10-01 | 球帯状シール体 |
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US (1) | US9091381B2 (ja) |
EP (1) | EP2607755B1 (ja) |
JP (1) | JP5760364B2 (ja) |
CN (1) | CN103080617B (ja) |
BR (1) | BR112013002407B1 (ja) |
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JP5884447B2 (ja) * | 2011-11-30 | 2016-03-15 | オイレス工業株式会社 | 円筒状ガスケット及びその製造方法並びに該円筒状ガスケットを使用した差し込み型排気管継手 |
JP5966879B2 (ja) * | 2012-11-21 | 2016-08-10 | オイレス工業株式会社 | 球帯状シール体 |
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US9091381B2 (en) | 2015-07-28 |
CA2807118A1 (en) | 2012-02-23 |
EP2607755A4 (en) | 2016-11-09 |
EP2607755B1 (en) | 2019-10-02 |
EP2607755A1 (en) | 2013-06-26 |
JP5760364B2 (ja) | 2015-08-12 |
CN103080617A (zh) | 2013-05-01 |
US20130147127A1 (en) | 2013-06-13 |
BR112013002407B1 (pt) | 2020-06-16 |
CN103080617B (zh) | 2016-06-29 |
JP2012063005A (ja) | 2012-03-29 |
CA2807118C (en) | 2015-10-06 |
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