WO2015002143A1 - シールリング - Google Patents
シールリング Download PDFInfo
- Publication number
- WO2015002143A1 WO2015002143A1 PCT/JP2014/067400 JP2014067400W WO2015002143A1 WO 2015002143 A1 WO2015002143 A1 WO 2015002143A1 JP 2014067400 W JP2014067400 W JP 2014067400W WO 2015002143 A1 WO2015002143 A1 WO 2015002143A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seal ring
- ring
- sliding surface
- circumferential direction
- concave portion
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims description 24
- 239000011347 resin Substances 0.000 claims description 23
- 229920003002 synthetic resin Polymers 0.000 claims description 12
- 239000000057 synthetic resin Substances 0.000 claims description 12
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 8
- 229920002530 polyetherether ketone Polymers 0.000 claims description 8
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 7
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 7
- 238000007789 sealing Methods 0.000 abstract description 16
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 35
- 239000010720 hydraulic oil Substances 0.000 description 16
- 230000002093 peripheral effect Effects 0.000 description 12
- 238000012360 testing method Methods 0.000 description 11
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
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- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 5
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- 229920000049 Carbon (fiber) Polymers 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- -1 ether ketone ketone Chemical class 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
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- 229920001643 poly(ether ketone) Polymers 0.000 description 2
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- 239000007787 solid Substances 0.000 description 2
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
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- 239000000945 filler Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920006259 thermoplastic polyimide Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1025—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by non-chemical features of one or more of its constituents
-
- 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
- F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
- F16J15/3272—Mounting of sealing rings the rings having a break or opening, e.g. to enable mounting on a shaft otherwise than from a shaft end
-
- 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
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
- F16J15/48—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings influenced by the pressure within the member to be sealed
-
- 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
- F16J9/08—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction with expansion obtained by pressure of the medium
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0645—Macromolecular organic compounds, e.g. prepolymers obtained otherwise than by reactions involving carbon-to-carbon unsaturated bonds
- C09K2200/0657—Polyethers
Definitions
- the present invention is to seal a fluid in a device using fluid pressure of a fluid such as a hydraulic fluid such as an automatic transmission (hereinafter referred to as AT) or a continuously variable transmission (hereinafter referred to as CVT). It relates to the seal ring used.
- a fluid such as a hydraulic fluid such as an automatic transmission (hereinafter referred to as AT) or a continuously variable transmission (hereinafter referred to as CVT). It relates to the seal ring used.
- an oil seal ring for sealing the hydraulic oil is attached to a key point.
- the working oil supplied from the oil passage between the two annular grooves is attached to a pair of spaced annular grooves provided on the rotation shaft inserted through the shaft hole of the housing, and the side surfaces and inner peripheral surfaces of both seal rings.
- the side wall of the annular groove and the inner peripheral surface of the housing are sealed by the opposite side surface and the outer peripheral surface.
- Each seal surface in the seal ring holds the hydraulic pressure of the hydraulic oil between the seal rings while being in sliding contact with the side wall of the annular groove and the inner peripheral surface of the housing.
- Such a seal ring requires little oil loss and sufficient oil sealability.
- improvement of fuel efficiency has been an important issue, and further improvements in low torque performance are desired in devices such as AT and CVT while maintaining good sealing performance.
- FIG. 9 is a partially cutaway view of the seal ring.
- a flow path for introducing a fluid to be sealed is formed on the sliding surface 21 of the ring, and a protrusion 23 (both sides of the protrusion are recessed 22 in the middle of the flow path). ) Is provided to generate dynamic pressure so as to reduce the surface pressure between the sliding surfaces.
- FIG. 10 is a view showing a state in which the seal ring is attached to the annular groove. As shown in FIG. 10, the seal ring is attached to the annular groove 31, and is a recess having a configuration in which the edge of the sliding portion 32 on the non-contacting portion 33 side is partially cut out. 34 is provided.
- the seal ring of Patent Document 1 can be expected to have an oil film formation effect due to dynamic pressure during high-speed rotation, but hardly exhibits an oil film formation effect during low-speed rotation. Therefore, during low-speed rotation, the oil cannot form an oil film on the sealing surface (the portion of the sliding surface 21 that actually slides relative to the annular groove), and cannot contribute to a reduction in torque or wear. . This is because the top of the protrusion 23 is located inside the sliding surface 21 of the seal ring, and the oil that has entered the recess 22 (lubricating groove) flows over the protrusion 23 and flows into the adjacent recess 22 during low-speed rotation. It can be thought of as a result.
- the seal ring of Patent Document 2 is easy to introduce oil into the sliding surface 32, has excellent oil film formation on the sliding surface 32 from low speed rotation to high speed rotation, and is excellent in low torque.
- the area of the recess 34 on the sliding surface 32 cannot be made large, and the reduction of the sliding area is limited.
- the present invention has been made to cope with such problems, and provides a seal ring that has a good balance between low oil leakage, which is the original purpose of the seal ring, and low torque for improving fuel efficiency. For the purpose.
- the seal ring of the present invention is attached to an annular groove provided in one member of a housing having a shaft hole and a rotating shaft inserted through the shaft hole, and contacts the surface of the other member.
- a seal ring that slidably contacts a side wall surface on the non-sealing fluid side and seals an annular gap between these members, the seal ring being at least a side surface of the ring that is a sliding surface with the side wall surface
- a V-shaped concave portion along the circumferential direction of the ring, which is a non-contact portion with the side wall surface, is provided in a part of the inner diameter side end of the ring. Further, the concave portion is characterized in that the opening size on the outer diameter side is larger than the opening size on the inner diameter side.
- the depth of the concave portion from the sliding surface is the deepest portion other than the end portion of the concave portion in the ring circumferential direction, and becomes shallower from the deepest portion toward both ends of the ring circumferential direction. It is characterized by being constant.
- the boundary between the ring circumferential end of the recess and the sliding surface is formed steeply with respect to the sliding surface, and is further formed in an R shape.
- a plurality of the recesses are provided apart from each other in the ring circumferential direction, and a ring side surface between adjacent recesses constitutes a part of the sliding surface.
- the seal ring is made of synthetic resin, and the synthetic resin is polyphenylene sulfide (hereinafter referred to as PPS) resin or polyether ether ketone (hereinafter referred to as PEEK) resin.
- PPS polyphenylene sulfide
- PEEK polyether ether ketone
- the seal ring of the present invention is attached to an annular groove provided in one member of a rotating shaft inserted through the housing having the shaft hole and the shaft hole, and is in contact with the surface of the other member. It is slidably in contact with the side wall surface on the sealing fluid side to seal the annular gap between these members, and at least a part of the inner diameter side end of the ring side surface that becomes the sliding surface with the side wall surface Since a V-shaped recess along the circumferential direction of the ring, which is a non-contact portion with the side wall surface, is provided, hydraulic oil or the like as a sealing fluid appropriately flows out to the sliding surface through the recess. Cheap. For this reason, it becomes a seal ring which has low oil leak property and low torque property in good balance.
- the hydraulic oil or the like that has flowed into the recess flows out from the recess to the sliding surface due to relative rotation with the rotating shaft of the seal ring.
- the opening size on the outer diameter side larger than the opening size on the inner diameter side of the recess, it becomes possible to allow more hydraulic oil or the like to flow out to the sliding surface, thereby exhibiting sufficiently low torque. To do.
- the depth of the concave portion from the sliding surface is the deepest portion other than the end portion in the ring circumferential direction of the concave portion, and becomes shallower from the deepest portion toward both ends in the ring circumferential direction, and is constant in the ring radial direction. Therefore, hydraulic oil or the like as a sealing fluid easily flows out to the sliding surface (ring side surface) between adjacent recesses, and has a sufficiently low torque. On the other hand, since it does not easily flow out to the sliding surface on the outer diameter side of the recess, it has low oil leakage.
- the boundary between the ring circumferential end of the recess and the sliding surface is formed steeply with respect to the sliding surface, even if the sliding surface wears, the decrease in the opening area of the recess is small, and the torque No change occurs.
- the boundary between the ring circumferential end of the recess and the sliding surface is further formed in an R shape, the sliding surface (ring side surface) between adjacent recesses is a sealing fluid. Oil and the like are more likely to flow out, and torque can be further reduced.
- the seal ring is made of synthetic resin and the synthetic resin is PPS resin or PEEK resin, it excels in bending elastic modulus, heat resistance, etc. Can be used even when the oil temperature is high.
- FIGS. 1 (a) is a perspective view of the seal ring
- FIG. 1 (b) is a partially enlarged sectional view of the seal ring of FIG. 1 (a)
- FIG. 2 is an assembly of the seal ring in an annular groove of the hydraulic device.
- a sectional view of the state is shown respectively.
- the seal ring 1 is a ring-shaped body having a substantially rectangular cross section having one joint 4 and is provided at the inner diameter side ends of both side surfaces 2 of the ring.
- a plurality of V-shaped recesses 3 are provided along the circumferential direction.
- the corners of the ring inner peripheral surface 1b and both side surfaces 2 (including the recesses 3) of the ring may be provided with straight or curved chamfers.
- the seal ring 1 is mounted in an annular groove 6 a provided in the rotary shaft 6 inserted through the shaft hole 5 a of the housing 5.
- the arrow in the figure is the direction in which the pressure from the hydraulic oil is applied, and the right side in the figure is the unsealed fluid side.
- the seal ring 1 is slidably in contact with the side wall surface 6b of the annular groove 6a on the non-sealing fluid side at the ring side surface 2 thereof.
- the outer peripheral surface 1a is in contact with the inner peripheral surface of the shaft hole 5a.
- the present invention can be similarly applied to a configuration in which the annular groove is provided not on the rotating shaft side but on the housing side.
- the kind of hydraulic oil according to a use is used suitably.
- the oil temperature is about 30 to 150 ° C.
- the oil pressure is about 0.5 to 3.0 MPa
- the rotation speed of the rotating shaft is about 1000 to 7000 rpm.
- the seal ring 1 is a cut-type ring having one joint 4 (see FIG. 1), and is expanded in diameter by elastic deformation and attached to the annular groove 6a. Since the seal ring 1 has the abutment 4, the diameter of the seal ring 1 is expanded by the hydraulic pressure of the hydraulic oil during use, and the outer peripheral surface 1 a is in close contact with the inner peripheral surface of the shaft hole 5 a.
- the shape of the mating hole 4 may be a straight cut type, an angle cut type, or the like, but it is preferable to employ a composite step cut type as shown in FIG.
- one side surface of the ring is a sliding surface with the side wall surface of the annular groove, and the ring side surface (sliding surface) has a non-contact portion with the side wall surface.
- a V-shaped recess 3 is formed.
- the boundary portion between the sliding surface X and the concave portion between adjacent concave portions has a continuous shape
- the boundary portion between the sliding surface Y on the outer diameter side of the concave portion and the concave portion has a discontinuous shape
- the concave portion may be formed at least on the side surface of the ring serving as a sliding surface. However, since there is no dependency on the assembly direction and the weight balance is excellent, it may be formed symmetrically on both side surfaces of the ring as shown in FIG. preferable.
- each of the recesses in the ring circumferential direction is preferably about 3 to 20% of the entire circumference of the ring depending on the number of the recesses.
- the length of the concave portion in the ring radial direction is preferably 10 to 60% of the total ring thickness.
- all the recesses have the same size, and a plurality of recesses (12 on one side in FIG. 1) are provided at substantially equal intervals.
- FIG. 3 is a view of a part of the seal ring of the present invention (A portion in FIG. 1) as viewed from the inner diameter side of the ring.
- the recessed part 3 is V-shaped along the ring circumferential direction.
- One of the side surfaces 2 of the ring is a sliding surface with the annular groove.
- the depth of the concave portion 3 from the sliding surface is the deepest portion 3c other than the end portion of the concave portion 3 in the ring circumferential direction, and becomes shallower from the deepest portion 3c toward both end portions in the ring circumferential direction. That is, the region closer to the sliding surface in the ring circumferential direction becomes shallower.
- the depth of the recess 3 from the sliding surface is constant in the ring radial direction.
- the bottom surface of the recess 3 is composed of a plane 3 a and a plane 3 b that are inclined from the sliding surface (side surface 2 of the ring) toward the center in the width direction along the circumferential direction of the ring. Is done.
- V-shaped recess will be described with reference to FIG. 11A to 11C are views of the V-shaped concave portion of the seal ring as viewed from the front.
- the opening size of the outer diameter side 3e is designed to be larger than the opening size of the inner diameter side 3f of the recess 3. That is, in the ring side surface 2, the front shape of the V-shaped recess 3 that is a non-contact surface (outlined portion) with the side wall surface of the annular groove has a non-contact area on the outer diameter side 3 e rather than the inner diameter side 3 f. It is formed to be large.
- the opening size on the inner diameter side of the recess is the opening on the outer diameter side. Since it is smaller than the dimension, more hydraulic oil or the like flows out to the sliding surface than in the case where the opening dimension on the inner diameter side and the opening dimension on the outer diameter side of the recess are the same. This is because the amount of hydraulic oil or the like flowing out from the inside of the concave portion can be prevented from coming out to the inner diameter side of the seal ring when it hits the circumferential end of the concave portion.
- the position of the deepest portion 3c is the center position of the concave portion 3 in the ring circumferential direction, but is not particularly limited thereto.
- the bottom face of the recessed part 3 is comprised from the plane 3a and the plane 3b which inclined along the ring circumferential direction, you may comprise by a curved surface instead of a plane.
- the deepest portion 3c of the recess 3 may have a curved shape or a horizontal shape in addition to a V shape in which the flat surface 3a and the flat surface 3b are simply connected. Even if it is curved or horizontal, there is no adverse effect on the torque reduction effect.
- the depth from the sliding surface of the deepest part 3c of the recess 3 is preferably 45% or less, more preferably 30% or less of the total ring width.
- the “depth” is the sum of the depths of the recesses on each side surface when the recesses are formed on both side surfaces of the ring. If it exceeds 45% of the total ring width, the ring may be greatly deformed during use.
- FIG. 5 is an enlarged sectional view showing an example of a boundary portion.
- the boundary 3d between the ring circumferential end of the recess 3 and the sliding surface is formed to be steep with respect to the sliding surface. Is preferred. That is, in the recess 3, it is preferable that the gradient of the boundary portion 3d with respect to the sliding surface is larger than the gradient of the portion other than the boundary portion 3d with respect to the sliding surface.
- this steep slope can be formed in an R shape that is convex toward the center in the width direction of the ring.
- the material of the seal ring of the present invention is not particularly limited. However, considering the formation of the above-mentioned concave portion on the side surface or the expansion of the diameter by elastic deformation and mounting in the groove, etc., a synthetic resin molded body can be obtained. preferable.
- synthetic resins that can be used include thermosetting polyimide resins, thermoplastic polyimide resins, polyether ketone ether ketone ketone resins, polyether ketone resins, PEEK resins, wholly aromatic polyester resins, polytetrafluoroethylene (hereinafter referred to as PTFE). And fluororesin such as resin, PPS resin, polyamideimide resin, polyamide resin and the like. These resins may be used alone or as a polymer alloy in which two or more kinds are mixed.
- the seal ring is injected with synthetic resin because it is easy and low cost to manufacture the seal ring having the above-mentioned concave part and composite step cut joint, and the rotational torque is lower and more stable than when machined. It is preferable to form an injection-molded body formed by molding. For this reason, it is preferable to use a thermoplastic resin that can be injection-molded as the synthetic resin. Among them, it is particularly preferable to use PEEK resin or PPS resin because of excellent friction and wear characteristics, flexural modulus, heat resistance, slidability and the like. These resins have a high elastic modulus and do not crack even when they are expanded in diameter when incorporated in a groove, and can be used even when the temperature of the hydraulic fluid to be sealed becomes high, and there is no concern about solvent cracks.
- the synthetic resin may be added to a fibrous reinforcing material such as carbon fiber, glass fiber or aramid fiber, a spherical filler such as spherical silica or spherical carbon, a scale-like reinforcing material such as mica or talc, potassium titanate whisker.
- a fine fiber reinforcing material such as
- a solid lubricant such as PTFE resin, graphite and molybdenum disulfide, a sliding reinforcing material such as calcium phosphate and calcium sulfate, carbon black and the like can also be blended. These can be blended alone or in combination.
- a PEEK resin or a PPS resin containing carbon fiber as a fibrous reinforcing material and PTFE resin as a solid lubricant is preferable because the characteristics required for the seal ring of the present invention can be easily obtained.
- mechanical strength such as flexural modulus can be improved, and sliding characteristics can be improved by blending PTFE resin.
- the gate position is not particularly limited, but it is preferably provided on the inner peripheral surface of the ring from the viewpoint of ensuring sealing performance and the need for post-processing. In addition, it is preferable that the gate position is provided at the facing portion on the inner peripheral surface of the ring from the viewpoint of flow balance in injection molding.
- Example 1 and Comparative Examples 1 to 3 Using a resin composition (made by NTN Precision Resin Co., Ltd .: BEAREE PK5301) containing PEEK resin as the main material and blended with carbon fiber and PTFE resin, seal rings (outer diameter ⁇ 50 mm, inner diameter ⁇ 47 mm, ring) shown in Table 1 1.5 mm wide and 1.5 mm ring thickness) were manufactured by injection molding.
- seal rings outer diameter ⁇ 50 mm, inner diameter ⁇ 47 mm, ring shown in Table 1 1.5 mm wide and 1.5 mm ring thickness
- surface is an area of the ring side surface except each recessed part used as a non-contact part.
- Reference example 1 A seal ring (outer diameter ⁇ 50 mm, inner diameter ⁇ 47 mm, ring width 1.5 mm, ring thickness 1.5 mm) having the shape shown in FIG. 9 (JP-A-8-121603) is injection molded using the same material as in Example 1. Manufactured by.
- FIG. 6 is a schematic diagram of the testing machine.
- Seal rings 12 and 12 ′ were mounted in the annular groove of the counterpart shaft 11.
- the seal rings 12 and 12 ′ are in sliding contact with the annular groove side wall of the counterpart shaft 11 and the inner peripheral surface of the shaft hole of the housing 13.
- Oil was pumped from the right side of the apparatus and supplied to the annular gap between the seal rings 12 and 12 '.
- the conditions of the rotational torque test are a hydraulic pressure of 0.5 to 3.0 MPa, an oil temperature of 30 to 150 ° C., and a rotational speed of 1000 to 7000 rpm.
- the oil leak test conditions are a hydraulic pressure of 0.5 to 3.0 MPa and a rotational speed of 1000 to 7000 rpm. 7000 rpm, oil temperature 30 to 150 ° C. (4 conditions of 30 ° C., 70 ° C., 110 ° C., and 150 ° C.).
- the wear test conditions were an oil pressure of 3.0 MPa, an oil temperature of 150 ° C., and a rotation speed of 7000 rpm.
- Example 1 As shown in Table 2, the rotational torque of Example 1 was the lowest during low speed to high speed rotation, and was reduced by 50% or more compared to Comparative Example 1 (ringless ring). Moreover, the sealing characteristics of Example 1 were equivalent to Comparative Example 1 (ring without groove). Further, the amount of wear was the smallest in Example 1, and was about 10% of Comparative Example 1 (ring without groove). From this result, it can be seen that the seal ring according to Example 1 has a low oil leakage property and a low torque property in a well-balanced manner.
- the seal ring of the present invention has a low oil leakage property and a low torque property, which are the original purposes of the seal ring, in a well-balanced manner, and therefore can be used as a seal ring that requires these characteristics between the rotating shaft and the housing. .
- it can be suitably used for improving fuel efficiency in hydraulic equipment such as AT and CVT in automobiles.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Sealing Devices (AREA)
Abstract
Description
PEEK樹脂を主材料とし、炭素繊維およびPTFE樹脂を配合した樹脂組成物(NTN精密樹脂社製:ベアリーPK5301)を用い、表1に示すそれぞれの形状のシールリング(外径φ50mm、内径φ47mm、リング幅1.5mm、リング厚さ1.5mm)を射出成形により製造した。なお、表中の摺動面積は、非接触部となる各凹部を除くリング側面の面積である。
実施例1と同材料を用い、図9(特開平8-121603号公報)に示す形状のシールリング(外径φ50mm、内径φ47mm、リング幅1.5mm、リング厚さ1.5mm)を射出成形により製造した。
2 リング側面
3 V字状の凹部
4 合い口
5 ハウジング
6 回転軸
11 相手軸
12、12’ シールリング
13 ハウジング
Claims (7)
- 軸孔を有するハウジングおよび前記軸孔に挿通される回転軸の一方の部材に設けられた環状溝に装着されて、他方の部材表面に接触し、かつ前記環状溝の非密封流体側の側壁面に摺動自在に接触して、これら部材間の環状隙間を封止するシールリングであって、
該シールリングは、少なくとも前記側壁面との摺動面となるリング側面の内径側端部の一部に、前記側壁面との非接触部となる、リング周方向に沿ったV字状の凹部が設けられていることを特徴とするシールリング。 - 前記凹部は、内径側の開口寸法より外径側の開口寸法の方が大きいことを特徴とする請求項1記載のシールリング。
- 前記凹部の前記摺動面からの深さは、該凹部のリング周方向の端部以外に最深部があり、該最深部からリング周方向の両端部に向けて浅くなり、リング径方向には一定であることを特徴とする請求項1記載のシールリング。
- 前記凹部のリング周方向の端部と前記摺動面との境界部が前記摺動面に対して急勾配に形成されていることを特徴とする請求項3記載のシールリング。
- 前記凹部のリング周方向の端部と前記摺動面との境界部がR状に形成されていることを特徴とする請求項4記載のシールリング。
- 前記凹部がリング周方向で離間して複数個設けられ、隣り合う凹部同士の間のリング側面が前記摺動面の一部を構成することを特徴とする請求項1記載のシールリング。
- 前記シールリングは合成樹脂製であり、該合成樹脂がポリフェニレンサルファイド樹脂またはポリエーテルエーテルケトン樹脂であることを特徴とする請求項1記載のシールリング。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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US14/902,578 US10634253B2 (en) | 2013-07-03 | 2014-06-30 | Seal ring |
CN201480037273.1A CN105378351B (zh) | 2013-07-03 | 2014-06-30 | 密封环 |
KR1020167002482A KR102283650B1 (ko) | 2013-07-03 | 2014-06-30 | 시일 링 |
EP14819350.1A EP3018388B1 (en) | 2013-07-03 | 2014-06-30 | Seal ring |
Applications Claiming Priority (4)
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JP2013-139984 | 2013-07-03 | ||
JP2013139984 | 2013-07-03 | ||
JP2014133008A JP6386814B2 (ja) | 2013-07-03 | 2014-06-27 | シールリング |
JP2014-133008 | 2014-06-27 |
Publications (1)
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WO2015002143A1 true WO2015002143A1 (ja) | 2015-01-08 |
Family
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US (1) | US10634253B2 (ja) |
EP (1) | EP3018388B1 (ja) |
JP (1) | JP6386814B2 (ja) |
KR (1) | KR102283650B1 (ja) |
CN (1) | CN105378351B (ja) |
WO (1) | WO2015002143A1 (ja) |
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JP6798776B2 (ja) * | 2015-10-16 | 2020-12-09 | 株式会社リケン | シールリング |
EP3327321B1 (en) | 2016-09-30 | 2019-09-18 | Tpr Co., Ltd. | Seal ring |
WO2018138574A1 (en) | 2017-01-10 | 2018-08-02 | Saint-Gobain Performance Plastics L+S GMBH | Seal rings and methods for making them |
PL3568277T3 (pl) * | 2017-01-10 | 2024-04-08 | Saint-Gobain Performance Plastics L+S GMBH | Pierścienie uszczelniające formowane metodą wtrysku i sposoby ich wytwarzania |
JP6803965B2 (ja) * | 2017-03-10 | 2020-12-23 | Nok株式会社 | シールリング |
DE112018003269T5 (de) * | 2017-06-27 | 2020-03-05 | Nok Corporation | Dichtungsring |
JP6878209B2 (ja) * | 2017-08-31 | 2021-05-26 | Ntn株式会社 | シールリング |
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CN112762098B (zh) * | 2021-01-21 | 2022-06-28 | 珞石(北京)科技有限公司 | 用于运动轴的非接触密封系统及工业机器人 |
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EP3018388A1 (en) | 2016-05-11 |
CN105378351A (zh) | 2016-03-02 |
KR102283650B1 (ko) | 2021-07-30 |
JP2015028382A (ja) | 2015-02-12 |
JP6386814B2 (ja) | 2018-09-05 |
US10634253B2 (en) | 2020-04-28 |
EP3018388B1 (en) | 2020-05-13 |
US20160186862A1 (en) | 2016-06-30 |
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