WO2021246085A1 - 密封構造 - Google Patents
密封構造 Download PDFInfo
- Publication number
- WO2021246085A1 WO2021246085A1 PCT/JP2021/016371 JP2021016371W WO2021246085A1 WO 2021246085 A1 WO2021246085 A1 WO 2021246085A1 JP 2021016371 W JP2021016371 W JP 2021016371W WO 2021246085 A1 WO2021246085 A1 WO 2021246085A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- backup ring
- sealing
- seal member
- members
- annular groove
- Prior art date
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 146
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 description 16
- 229920002292 Nylon 6 Polymers 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/166—Sealings between relatively-moving surfaces with means to prevent the extrusion of the packing
-
- 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
-
- 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
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
-
- 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
- F16J15/067—Split packings
Definitions
- the present invention relates to a sealed structure. More specifically, the present invention relates to a sealing structure in which the sealing member is prevented from protruding when the sealing member is pressed in a flat surface seal.
- the sealing member used for the sealing structure is an O-ring or the like, and is classified into a flat surface seal and a cylindrical surface seal according to the mounting method.
- the flat surface seal for example, the seal members described in Patent Documents 1 and 2 are known.
- Patent Document 1 describes a pressure vessel having a sealing member (see FIG. 2) provided between a resin liner and a valve.
- At least one side of the liner is a split type, and a sealing member (see FIG. 12A) is interposed on the joint surface between the liner body and the split body over the entire circumference of the opening end.
- a high-pressure tank in which a deformed portion that deforms toward the sealing surface that abuts on the sealing member is formed is described on one of the liner main body and the split body.
- the present invention has been made in view of such a prior art, and an object thereof is that in a flat surface seal, when the seal member is pressed, the seal member is prevented from protruding, and further. Is to develop a sealed structure with improved pressure resistance.
- a sealing structure having a sealing device which is a flat seal which is arranged in an annular groove provided in one of the two members and seals the gap between the two members.
- the sealing device is A rubber-like elastic seal member placed on the high-pressure side, Adjacent to the seal member, a resin backup ring mounted on the lower pressure side of the seal member is provided.
- the backup ring is in the shape of an endd ring having a notch. The notch extends parallel to the thickness direction of the backup ring and extends so as to intersect the radial direction of the backup ring.
- a sealing structure in which the sealing member and the backup ring are respectively arranged between the two members in a state of being pressurized from the two members.
- a sealing structure having a sealing device which is a flat seal which is arranged in an annular groove provided in one of the two members and seals the gap between the two members.
- a tapered surface that expands in diameter toward the low pressure side is provided on the low pressure side of the bottom surface of the annular groove.
- the sealing device is A rubber-like elastic seal member placed on the high-pressure side, Adjacent to the seal member, a resin backup ring mounted on the lower pressure side of the seal member is provided.
- the bottom surface of the backup ring is a tapered surface that expands in diameter from one opening of the backup ring toward the other opening.
- the angle between the tapered surface of the backup ring and the tapered surface of the annular groove is more than 0 °.
- the backup ring is arranged so that its outer surface has a gap between it and the side surface on the low pressure side of the annular groove.
- FIG. 1 It is sectional drawing which shows typically one Embodiment of the sealing structure of this invention (the first invention). It is an enlarged sectional view schematically showing an enlarged part in one Embodiment of the sealing structure of 1st invention. It is a top view schematically showing the backup ring in one Embodiment of the sealing structure of 1st invention. It is an enlarged view which shows the part of FIG. 3 enlarged and schematically. It is sectional drawing which shows typically the XX cross section of FIG. It is a top view which shows typically the seal member and the backup ring in one Embodiment of the sealing structure of 1st invention.
- the sealing structure 100 is a flat seal that is arranged in an annular groove 15 provided in one of the two members 11 and 12 and seals the gap S between the two members 11 and 12. It has a device 10.
- the sealing device 10 is made of a rubber-like elastic body seal member 31 arranged on the high pressure side H and a resin material adjacent to the seal member 31 and mounted on the low pressure side L of the seal member 31. It is equipped with a backup ring 32.
- the backup ring 32 has an endd ring shape in which a notch 20 is formed in a part thereof (see FIG. 3).
- the notch 20 extends parallel to the thickness direction of the backup ring 32 and extends so as to intersect the radial direction of the backup ring 32.
- the seal member 31 and the backup ring 32 are arranged between the two members 11 and 12 in a state of being pressurized from the two members 11 and 12, respectively. Since the seal member 31 and the backup ring 32 are in contact with the two members 11 and 12, respectively, because they are arranged in a pressurized state, a gap is generated between the two members 11 and 12, respectively. Not.
- the sealing structure 100 prevents the sealing member 31 from protruding when the sealing member 31 is pressed, and further, the backup ring 32 absorbs the pressure at high pressure, so that the pressure resistance is increased. It will be improved.
- the flat surface seal is used as a fixed seal and is classified into an internal pressure type and an external pressure type.
- FIG. 1 shows a flat surface seal for internal pressure.
- the two members 11 and 12 are not particularly limited, and specifically, as shown in FIG. 1, one member 11 may be a lid 21 and the other member 12 may be an accommodating body 22.
- An annular groove 15 is formed in the vicinity of the opening 13 of the accommodating body 22, and the sealing device 10 is arranged in the annular groove 15.
- the annular groove 15 may be formed on the lid 21 side.
- the shape of the bottom surface of the annular groove 15 can be flat in the cross section in the depth direction, and both side surfaces thereof can be formed parallel to the depth direction. That is, the distance between both side surfaces of the annular groove 15 can be constant from the opening of the annular groove 15 to the bottom surface.
- the annular groove 15 may be provided with a tapered surface whose diameter increases toward the low pressure side L on the low pressure side L of the bottom surface 16 as shown in FIG.
- the sealing device 10 includes a rubber-like elastic sealing member 31 arranged on the high-pressure side H, and a resin backup ring adjacent to the sealing member 31 and mounted on the low-pressure side L of the sealing member 31. 32 and (see FIG. 6).
- the sealing device 10 when the pressure in one of the spaces 41 partitioned by the sealing device 10 increases (that is, when the pressure becomes high), the sealing device 10 causes the pressure on the other side to be smaller due to the pressure. It is pressed against the side surface 18 of the annular groove 15 so as to move to the space 42 side (low pressure side L). Then, in the sealing device 10 pressed against the side surface 18 of the annular groove 15, the sealing member 31 and the backup ring 32 are deformed.
- a gap is generated between the backup ring and the lid, and the sealing member may enter the gap (so-called the sealing member protrudes).
- the present invention by providing the backup ring 32 which is a specific backup ring, it is possible to prevent the sealing member 31 from protruding like a conventional sealing device.
- the seal member 31 and the backup ring 32 constituting the sealing device 10 are arranged between the two members 11 and 12 in a state of being pressurized from the two members 11 and 12, respectively.
- the seal member 31 and the backup ring 32 By arranging the seal member 31 and the backup ring 32 in such a state, the gap between the two members 11 and 12 can be sealed and the state can be maintained.
- the crushing allowance of the seal member 31 and the backup ring 32 is not particularly limited as long as the sealing property is ensured under pressure conditions, and can be the same as the crushing allowance of the conventionally known seal member and backup ring.
- the seal member 31 is an annular member made of a rubber-like elastic body arranged on the high-pressure side H, and a conventionally known seal member can be appropriately selected and used. Examples of the seal member 31 include an O-ring and the like.
- the same material as that of the conventionally known seal member can be appropriately adopted.
- Specific examples thereof include synthetic resins such as rubber.
- the seal member 31 is not particularly limited in its cross-sectional shape in the thickness direction, but may be, for example, circular or elliptical.
- the backup ring 32 is a resin member that is adjacent to the seal member 31 (see FIGS. 1, 2, and 6) and is mounted on the low pressure side L of the seal member 31.
- the backup ring 32 is in the shape of an endd ring having a notch 20. That is, in the backup ring 32, a part of the annular backup ring is cut off to form a space (notch portion 20) between both end faces.
- the backup ring 32 in which the notch 20 is formed in this way when the pressure in one of the spaces 41 increases (when the pressure becomes high), the end portion of the backup ring 32 is satisfactorily subjected to the pressure. transform. Specifically, as shown in FIG. 7, a part of the end portion of the backup ring 32 is deformed to fill the notch portion 20. When the notch 20 is filled in this way, the sealing member 31 is prevented from protruding.
- conventionally, by further providing the backup ring 32 it is possible to prevent the seal member 31 from protruding.
- members such as the lid are still greatly deformed during use, and there is a tendency for a gap to be generated between the backup ring and the member such as the lid.
- the conventional backup ring may not be able to sufficiently follow the deformation of a member such as a lid, and the gap may not be prevented.
- the seal member may enter the gap between the backup ring and the member such as the lid, and the seal member may protrude.
- the notch portion 20 in the backup ring 32 for example, as compared with the case where the notch portion 20 is not a mere cut portion (that is, both end faces of the backup ring are in contact with each other). Even when a member such as a lid is greatly deformed to form a gap, the seal member 31 is prevented from protruding.
- the notch 20 extends parallel to the thickness direction of the backup ring 32 and extends so as to intersect the radial direction of the backup ring 32.
- “Crossing with the radial direction of the backup ring 32” means drawing a straight line L1 passing through the center O1 of the backup ring 32 and the center O2 of the notch 20, and further drawing the center O1 of the backup ring 32 as shown in FIG. It means that the straight line L1 and the straight line L2 intersect when a straight line L2 parallel to the extending direction of the passage cutout 20 is drawn.
- the center O2 of the cutout portion 20 draws a straight line T1 connecting the end point A on the inner surface 38 side of one end surface 35 and the end point b on the outer surface 39 side of the other end surface 36, and further, one side.
- a straight line T2 connecting the end point B on the outer surface 39 side of the end surface 35 and the end point a on the inner surface 38 side of the other end surface 36 it means the intersection of the straight line T1 and the straight line T2.
- the width D of the notch 20 (that is, the maximum distance between both end faces of the backup ring 32) is not particularly limited and can be appropriately set.
- the notch 20 intersects so that the angle ⁇ 1 formed by the radial direction of the backup ring 32 (that is, the angle ⁇ 1 (acute angle) formed by the straight line L1 and the straight line L2) (see FIG. 3) is 3 to 45 °. It is good to be there. By doing so, a part of the end portion of the backup ring 32 is easily deformed, and the sealing member 31 is satisfactorily suppressed from protruding.
- the backup ring 32 is not particularly limited in its cross-sectional shape in the thickness direction, but may be a polygon such as a quadrangle or a hexagon.
- the same material as the conventionally known backup ring material can be appropriately adopted.
- Specific examples thereof include synthetic resins such as nylon 6 (PA6) and polytetrafluoroethylene (PTFE).
- the backup ring 32 may be arranged so that the end surface 33 (outer surface 39) of the low pressure side L is in contact with the side surface 18 of the low pressure side L of the annular groove 15. That is, the backup ring 32 may be arranged so that there is no gap between the backup ring 32 and the side surface 18 of the low pressure side L of the annular groove 15.
- the sealing device 10 is fitted into the annular groove 15 formed in the accommodating body 22.
- the lid 21 is placed on the container 22, and the lid 21 is fixed to the container 22. In this way, the inside of the housing 22 is sealed.
- the sealing device 10 receives the internal pressure from the inside of the housing 22. This internal pressure is indicated by an arrow in FIG. 7. Then, when the pressure in one of the spaces 41 partitioned by the sealing device 10 increases, the sealing device 10 moves the annular groove 15 to the other space 42, which is the side with the smaller pressure, due to the pressure. It is pressed against the side surface 18 and deformed. At this time, as shown in FIG. 7, the endd ring-shaped backup ring 32 is partially deformed to fill the notch 20. When the notch 20 is filled in this way, the sealing member 31 is prevented from protruding. Further, the pressure resistance of the seal member 31 is improved.
- the sealing structure 200 is a flat seal that is arranged in the annular groove 15 provided in one of the two members 11 and 12 and seals the gap S between the two members 11 and 12. It has a device.
- the low pressure side L of the bottom surface 16 of the annular groove 15 is provided with a groove tapered surface 51 which is a tapered surface whose diameter increases toward the low pressure side L (see FIG. 9).
- the sealing device 10 is made of a rubber-like elastic body seal member 31 arranged on the high pressure side H and a resin material adjacent to the seal member 31 and mounted on the low pressure side L of the seal member 31. It is equipped with a backup ring 32.
- the bottom surface 16 of the backup ring 32 is a tapered surface whose diameter increases from one opening of the backup ring 32 toward the other opening.
- the angle ⁇ 2 formed by the tapered surface of the backup ring 32 with the tapered surface of the annular groove 15 is more than 0 °.
- the backup ring 32 is arranged so as to have a gap 55 between the end surface 33 (outer surface 39) of the low pressure side L and the side surface 18 of the low pressure side L of the annular groove 15.
- the seal member 31 and the backup ring 32 are arranged between the two members 11 and 12 in a state of being pressurized from the two members 11 and 12, respectively. Since the seal member 31 and the backup ring 32 are in contact with the two members 11 and 12, respectively, because they are arranged in a pressurized state, a gap is generated between the two members 11 and 12, respectively. Not.
- the sealing structure 200 prevents the sealing member 31 from protruding when the sealing member 31 is pressed, and further, the backup ring 32 absorbs the pressure at high pressure, so that the pressure resistance is increased. It will be improved.
- the flat surface seal is used as a fixed seal and is classified into an internal pressure type and an external pressure type.
- FIG. 8 shows a flat surface seal for internal pressure.
- the backup ring 32 by further providing the backup ring 32, it is possible to prevent the seal member 31 from protruding.
- members such as the lid are still greatly deformed during use, and there is a tendency for a gap to be generated between the backup ring and the member such as the lid.
- the conventional backup ring may not be able to sufficiently follow the deformation of a member such as a lid, and the gap may not be prevented.
- the seal member may enter the gap between the backup ring and the member such as the lid, and the seal member may protrude.
- the backup ring 32 goes up the tapered surface and follows the gap, so that even if a member such as a lid is greatly deformed and a gap is generated, the seal member The protrusion of 31 is suppressed.
- the backup ring 32 is arranged so as to have a gap 55 between the end surface of the low pressure side L and the side surface 18 of the low pressure side L of the annular groove 15, the backup ring 32 is pushed from the seal member 31. At that time, it is possible to move (deform) so that the diameter is widened by the amount of the gap 55 provided.
- the two members 11 and 12 are not particularly limited, and specifically, as shown in FIG. 8, one member 11 may be a lid 21 and the other member 12 may be an accommodating body 22. An annular groove 15 is formed in the vicinity of the opening 13 of the accommodating body 22, and the sealing device 10 is arranged in the annular groove 15. The annular groove 15 may be formed in the lid 21.
- the low pressure side L of the bottom surface 16 of the annular groove 15 is provided with a groove tapered surface 51 which is a tapered surface whose diameter increases toward the low pressure side L.
- the seal member 31 is placed in the internal pressure (pressure) in the accommodating body 22.
- the seal member 31 is pushed to increase the diameter of the backup ring 32, the backup ring 32 rises on the groove tapered surface 51 (see FIG. 10) to prevent a gap from being formed between the backup ring 32 and the lid 21. Will be done.
- the seal member 31 is pressurized, the seal member 31 is prevented from protruding.
- the angle ⁇ 3 formed by the extension line of the bottom surface 16 of the annular groove 15 and the groove tapered surface 51 can be 45 to 85 °, and further can be 50 to 80 °. By setting such an angle, when the seal member 31 is pressurized, the seal member 31 is further better suppressed from protruding.
- angle ⁇ 3 is an angle (acute angle) formed by the extension line of the bottom surface 16 of the annular groove 15 and the groove tapered surface 51 in the cross section of the annular groove 15 in the depth direction (see FIG. 9).
- the sealing device 10 includes a rubber-like elastic sealing member 31 arranged on the high-pressure side H, and a resin backup ring adjacent to the sealing member 31 and mounted on the low-pressure side L of the sealing member 31. 32 and.
- the sealing device 10 When the pressure in one of the spaces 41 partitioned by the sealing device 10 increases (that is, when the pressure becomes high), the sealing device 10 causes the other space 42 side (low pressure side L) which is the side where the pressure is small due to the pressure. ) Is pressed against the side surface 18 of the annular groove 15 (see FIGS. 9 and 10). Then, in the sealing device 10 pressed against the side surface 18 of the annular groove 15, the sealing member 31 and the backup ring 32 are deformed.
- a gap is generated between the backup ring and the lid, and the sealing member may enter the gap (so-called the sealing member protrudes).
- the groove tapered surface 51 and the backup ring 32 which is a specific backup ring arranged on the groove tapered surface 51 are provided, and the backup ring 32 is a side surface of the annular groove 15.
- the seal member 31 and the backup ring 32 constituting the sealing device 10 are arranged between the two members 11 and 12 in a state of being pressurized from the two members 11 and 12, respectively, and in such a state. By arranging them, the gap between the two members 11 and 12 can be sealed and the state can be maintained.
- the crushing allowance of the seal member 31 and the backup ring 32 is not particularly limited as long as the sealing property is ensured under pressure conditions, and can be the same as the crushing allowance of the conventionally known seal member and backup ring.
- the seal member 31 is an annular member made of a rubber-like elastic body arranged on the high-pressure side H, and a conventionally known seal member can be appropriately selected and used. Examples of the seal member 31 include an O-ring and the like.
- the same material as that of the conventionally known seal member can be appropriately adopted.
- Specific examples thereof include synthetic resins such as rubber.
- the seal member 31 is not particularly limited in its cross-sectional shape in the thickness direction, but may be, for example, circular or elliptical.
- (3-2b) Backup ring As described above, the backup ring 32 is made of resin and is mounted on the low pressure side L of the seal member 31 adjacent to the seal member 31. By providing the backup ring 32 in a predetermined state, it is possible to prevent the seal member 31 from protruding. Further, the pressure resistance of the seal member 31 is improved.
- the bottom surface 34 of the backup ring 32 is a tapered surface (bottom surface tapered surface) whose diameter increases from one opening of the backup ring 32 toward the other opening. That is, the backup ring 32 has a conical inclined surface on one opening side.
- the angle ⁇ 2 formed by the bottom tapered surface, which is the bottom surface 34 of the backup ring 32, with the tapered surface of the annular groove 15 is more than 0 °.
- the angle formed by the extension line of the bottom surface 16 of the annular groove 15 and the bottom surface 34 of the backup ring 32 is defined as the angle ⁇
- the angle formed by the extension line of the bottom surface 16 of the annular groove 15 and the tapered surface of the annular groove 15 is defined as the angle ⁇ .
- the angle ⁇ is compared with the angle ⁇ , the angle ⁇ is larger than the angle ⁇ .
- the angle ⁇ 2 is often 5 to 25 °, and even more preferably 5 to 15 °. By doing so, the backup ring 32 is less likely to fall, and the sealing member 31 is prevented from protruding. Further, the pressure resistance of the seal member 31 is improved.
- the backup ring 32 is arranged so that the end surface 33 (outer surface 39) of the low pressure side L has a gap 55 between the end surface 33 (outer surface 39) of the low pressure side L and the side surface 18 of the low pressure side L of the annular groove 15.
- the backup ring 32 has an angle of more than 0 ° between the bottom surface 34 (bottom taper surface) of the backup ring 32 and the groove taper surface 51 of the annular groove 15.
- the backup ring 32 may be an annular body without a notch as described above, or may have an endd ring shape in which a part thereof is cut to form a notch. When it is in the shape of an endd ring, it may be in the shape of an endd ring having a notch 20 like the backup ring 32 in the first invention described above, or it may be in a state where both end faces 35 and 36 are in contact with each other (notch 20). There may be no space between both end faces 35 and 36 as in the above). With the end ring shape as described above, the diameter of the backup ring 32 tends to expand when a force is applied from the seal member 31. By providing a notch in the same direction as the notch 20 of the backup ring 32 in the above-mentioned first invention, it is possible to avoid damaging the seal member 31 by the backup ring 32.
- the same material as the conventionally known backup ring material can be appropriately adopted.
- Specific examples thereof include synthetic resins such as nylon 6 (PA6) and polytetrafluoroethylene (PTFE).
- PA6 nylon 6
- PTFE polytetrafluoroethylene
- the sealing device 10 is fitted into the annular groove 15 formed in the accommodating body 22.
- the lid 21 is placed on the container 22, and the lid 21 is fixed to the container 22. In this way, the inside of the housing 22 is sealed.
- the sealing device 10 receives the internal pressure from the inside of the housing 22. This internal pressure is indicated by a white arrow in FIG. Then, when the pressure in one of the spaces 41 partitioned by the sealing device 10 becomes large, the sealing device 10 is pushed by the sealing member 31 and the backup ring 32 rises on the groove tapered surface 51, and the backup ring 32 and the lid It is prevented that a gap is generated between the bodies 21. As a result, when the seal member 31 is pressurized, the seal member 31 is prevented from protruding. Further, since the backup ring 32 absorbs the pressure, the pressure resistance of the seal member 31 is improved.
- Example 1 A sealed structure as shown in FIG. 1 was produced.
- a sealing device having an annular sealing member made of a rubber material and a backup ring made of a rubber material is arranged in an annular groove formed in an opening of the housing in the two members of the lid and the housing.
- the sealing member and the backup ring constituting the sealing device were arranged between the lid and the housing under pressure from the lid and the housing, respectively.
- the seal member was an O-ring having a circular cross-sectional shape.
- the backup ring was in the shape of an endd ring with a notch.
- This backup ring was mounted adjacent to the seal member on the low pressure side of the seal member, and the end surface (outer surface) on the low pressure side thereof was arranged so as to be in contact with the side surface on the low pressure side of the annular groove. .. Further, the notch extends parallel to the thickness direction of the backup ring and extends so as to intersect the radial direction of the backup ring. The notch had an angle (angle ⁇ 1) with the radial direction of the backup ring in the range of 3 to 45 °.
- the sealing member spreads outward (moves so as to spread outward), and the backup ring is pressed so as to widen the diameter of the adjacent backup ring. At this time, the backup ring is deformed so as to fill the notch (see FIG. 7). In this way, it is considered that the sealing member is prevented from protruding. Further, since the backup ring absorbs the pressure, it is considered that the pressure resistance is improved.
- Example 1 A sealed structure was produced in the same manner as in Example 1 except that the backup ring was in the shape of an endd ring in which both end faces were brought into contact with each other without a gap (no notch was provided). Further, it is considered that this sealing structure does not have a sufficient effect of suppressing the sealing member from protruding when the internal pressure in the container is increased and the sealing member is pressurized as in the first embodiment. Moreover, it is considered that the improvement in pressure resistance is not recognized.
- Example 2 A sealed structure as shown in FIG. 8 was produced.
- a sealing device having an annular sealing member made of a rubber material and a backup ring made of a rubber material is arranged in an annular groove formed in an opening of the housing in the two members of the lid and the housing.
- the sealing member and the backup ring constituting the sealing device were arranged between the lid and the housing under pressure from the lid and the housing, respectively.
- the seal member was an O-ring having a circular cross-sectional shape.
- the backup ring was mounted adjacent to the seal member on the low pressure side of the seal member.
- the low pressure side of the bottom surface of the annular groove was provided with a tapered surface (groove tapered surface) whose diameter increased toward the low pressure side.
- the bottom surface of the backup ring was a tapered surface that increased in diameter from one opening of the backup ring toward the other opening. Further, the angle (angle ⁇ 2) formed by the tapered surface of the backup ring with the tapered surface of the annular groove is more than 0 °, and is particularly in the range of 5 to 25 °.
- the backup ring was arranged so that the end surface (outer surface) on the low pressure side thereof had a gap between the end surface (outer surface) on the low pressure side and the side surface on the low pressure side of the annular groove.
- the sealing member spreads outward (moves so as to spread outward), and the backup ring is pressed so as to widen the diameter of the adjacent backup ring. At this time, the backup ring moves so as to go up the groove tapered surface. By moving in this way, it is possible to prevent a gap from being formed between the backup ring and the lid, and it is possible to prevent the seal member from entering the gap (that is, the seal member sticking out). it is conceivable that. Further, since the backup ring absorbs the pressure, it is considered that the pressure resistance is improved.
- Example 2 A sealed structure was produced in the same manner as in Example 2 except that the angle (angle ⁇ 2) formed by the tapered surface of the backup ring and the tapered surface of the annular groove was set to 0 °. Further, it is considered that this sealing structure does not have a sufficient effect of suppressing the sealing member from protruding when the internal pressure in the container is increased and the sealing member is pressurized as in the second embodiment. Moreover, it is considered that the improvement in pressure resistance is not recognized.
- the sealing structure of the present invention can be adopted as a sealing structure used for parts that require sealing in various devices such as vehicles.
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Abstract
Description
前記密封装置は、
高圧側に配置されるゴム状弾性体製のシール部材と、
前記シール部材に隣接して、当該シール部材よりも低圧側に装着される樹脂製のバックアップリングと、を備え、
前記バックアップリングは、切欠部を有する有端リング状であり、
前記切欠部は、前記バックアップリングの厚さ方向に平行に延び、且つ、前記バックアップリングの径方向と交差するように延びており、
前記シール部材と前記バックアップリングは、それぞれ、前記2つの部材から加圧された状態で当該2つの部材の間に配置されている、密封構造。
前記環状溝における底面の低圧側には、低圧側に向かって拡径するテーパー面が設けられており、
前記密封装置は、
高圧側に配置されるゴム状弾性体製のシール部材と、
前記シール部材に隣接して、当該シール部材よりも低圧側に装着される樹脂製のバックアップリングと、を備え、
前記バックアップリングの底面は、前記バックアップリングの一方の開口から他方の開口に向かって拡径するテーパー面であり、
前記バックアップリングの前記テーパー面は、前記環状溝の前記テーパー面とのなす角度が、0°超であり、
前記バックアップリングは、その外面が、前記環状溝の低圧側の側面との間に隙間を有するように配置され、
前記シール部材と前記バックアップリングは、それぞれ、前記2つの部材から加圧された状態で当該2つの部材の間に配置されている、密封構造。
本発明(第1の発明)の密封構造の一の実施形態は、図1に示す密封構造100である。この密封構造100は、2つの部材11、12のうちの一方の部材に設けられた環状溝15内に配置されて、これら2つの部材11、12間の隙間Sを密封する平面シールである密封装置10を有するものである。そして、密封装置10は、高圧側Hに配置されるゴム状弾性体製のシール部材31と、このシール部材31に隣接して、当該シール部材31よりも低圧側Lに装着される樹脂製のバックアップリング32と、を備えている。バックアップリング32は、その一部に切欠部20が形成された有端リング状である(図3参照)。切欠部20は、バックアップリング32の厚さ方向に平行に延び、且つ、バックアップリング32の径方向と交差するように延びている。シール部材31とバックアップリング32は、それぞれ、2つの部材11、12から加圧された状態で当該2つの部材11、12の間に配置されている。なお、加圧された状態で配置されているため、シール部材31とバックアップリング32は、それぞれ、2つの部材11、12に接触しており、2つの部材11、12との間に隙間は生じていない。
2つの部材11,12は、特に制限はなく、具体的には、図1に示すように、一方の部材11を蓋体21とし、他方の部材12を収容体22とすることができる。そして、この収容体22の開口部13付近には、環状溝15が形成され、この環状溝15内に密封装置10が配置される。なお、環状溝15は、蓋体21側に形成されていてもよい。
密封装置10は、高圧側Hに配置されるゴム状弾性体製のシール部材31と、このシール部材31に隣接して、当該シール部材31よりも低圧側Lに装着される樹脂製のバックアップリング32と、を備えている(図6参照)。
シール部材31は、高圧側Hに配置されるゴム状弾性体製の環状の部材であり、従来公知のシール部材を適宜選択して使用することができる。シール部材31としては、例えば、Oリングなどを挙げることができる。
バックアップリング32は、シール部材31に隣接して(図1、図2、図6参照)、当該シール部材31よりも低圧側Lに装着される樹脂製の部材である。そして、バックアップリング32は、切欠部20を有する有端リング状である。即ち、バックアップリング32は、環状のバックアップリングの一部が切り取られて両端面の間に空間(切欠部20)が形成されたものである。
本発明の密封構造の使用方法について、密封構造100に基づいて以下に説明する。2つの部材は、一方が蓋体21であり、他方が収容体22である。
本発明(第2の発明)の密封構造の一の実施形態は、図8に示す密封構造200である。この密封構造200は、2つの部材11、12のうちの一方の部材に設けられた環状溝15内に配置されて、これら2つの部材11、12間の隙間Sを密封する平面シールである密封装置を有するものである。環状溝15における底面16の低圧側Lには、低圧側Lに向かって拡径するテーパー面である溝テーパー面51が設けられている(図9参照)。そして、密封装置10は、高圧側Hに配置されるゴム状弾性体製のシール部材31と、このシール部材31に隣接して、当該シール部材31よりも低圧側Lに装着される樹脂製のバックアップリング32と、を備えている。バックアップリング32の底面16は、バックアップリング32の一方の開口から他方の開口に向かって拡径するテーパー面である。バックアップリング32のテーパー面は、環状溝15のテーパー面とのなす角度θ2が、0°超である。バックアップリング32は、その低圧側Lの端面33(外面39)と環状溝15の低圧側Lの側面18との間に隙間55を有するように配置されている。シール部材31とバックアップリング32は、それぞれ、2つの部材11、12から加圧された状態で当該2つの部材11、12の間に配置されている。なお、加圧された状態で配置されているため、シール部材31とバックアップリング32は、それぞれ、2つの部材11、12に接触しており、2つの部材11、12との間に隙間は生じていない。
2つの部材11,12は、特に制限はなく、具体的には、図8に示すように、一方の部材11を蓋体21とし、他方の部材12を収容体22とすることができる。そして、この収容体22の開口部13付近には、環状溝15が形成され、この環状溝15内に密封装置10が配置される。なお、環状溝15は、蓋体21に形成されていてもよい。
密封装置10は、高圧側Hに配置されるゴム状弾性体製のシール部材31と、このシール部材31に隣接して、当該シール部材31よりも低圧側Lに装着される樹脂製のバックアップリング32と、を備えている。
シール部材31は、高圧側Hに配置されるゴム状弾性体製の環状の部材であり、従来公知のシール部材を適宜選択して使用することができる。シール部材31としては、例えば、Oリングなどを挙げることができる。
バックアップリング32は、上述したように、シール部材31に隣接して、当該シール部材31よりも低圧側Lに装着される樹脂製のものである。このバックアップリング32を所定の状態で設けることにより、シール部材31がはみ出すことが抑制される。更に、シール部材31の耐圧性が向上される。
(4)密封構造の使用方法:
本発明の密封構造の使用方法について、密封構造200に基づいて以下に説明する。2つの部材は、一方の部材11が蓋体21であり、他方の部材12が収容体22である。
図1に示すような密封構造を作製した。この密封構造は、蓋体と収容体の2つの部材において収容体の開口部に形成された環状溝内に、ゴム材料からなる環状のシール部材とゴム材料からなるバックアップリングを有する密封装置を配置していた。そして、密封装置を構成するシール部材とバックアップリングは、それぞれ、蓋体と収容体から加圧された状態でこれらの蓋体と収容体の間に配置されていた。シール部材は、断面形状が円形のOリングであった。バックアップリングは、切欠部を有する有端リング状であった。このバックアップリングは、シール部材に隣接して、当該シール部材よりも低圧側に装着され、かつ、その低圧側の端面(外面)が、環状溝の低圧側の側面と接するように配置されていた。更に、切欠部は、バックアップリングの厚さ方向に平行に延び、且つ、バックアップリングの径方向と交差するように延びていた。切欠部は、バックアップリングの径方向とのなす角度(角度θ1)が3~45°の範囲であった。
両端面の間に間隔を開けずに接触させた有端リング状のバックアップリングとしたこと(切欠部を設けない)以外は、実施例1と同様にして密封構造を作製した。そして、この密封構造は、実施例1と同様に収容体内の内圧が大きくなってシール部材が加圧された際に、当該シール部材がはみ出すことを抑制する効果が十分でないと考えられる。また、耐圧性の向上も認められないと考えられる。
図8に示すような密封構造を作製した。この密封構造は、蓋体と収容体の2つの部材において収容体の開口部に形成された環状溝内に、ゴム材料からなる環状のシール部材とゴム材料からなるバックアップリングを有する密封装置を配置していた。そして、密封装置を構成するシール部材とバックアップリングは、それぞれ、蓋体と収容体から加圧された状態でこれらの蓋体と収容体の間に配置されていた。シール部材は、断面形状が円形のOリングであった。バックアップリングは、シール部材に隣接して、当該シール部材よりも低圧側に装着されていた。
バックアップリングのテーパー面と環状溝のテーパー面とのなす角度(角度θ2)が、0°となるようにしたこと以外は、実施例2と同様にして密封構造を作製した。そして、この密封構造は、実施例2と同様に収容体内の内圧が大きくなってシール部材が加圧された際に、当該シール部材がはみ出すことを抑制する効果が十分でないと考えられる。また、耐圧性の向上も認められないと考えられる。
11,12:2つの部材
13:開口部
15:環状溝
16:底面
18:環状溝の側面
21:蓋体
22:収容体
31:シール部材
32:バックアップリング
33:バックアップリングの側面
34:バックアップリングの底面
35:一方の端面
36:他方の端面
37:切断部の端部
38:内面
39:外面
41:一方の空間
42:他方の空間
51:テーパー面
55:隙間
D:切欠部の幅
H:高圧側
L:低圧側
S:隙間
Claims (5)
- 2つの部材のうちの一方の部材に設けられた環状溝内に配置されて、これら2つの部材間の隙間を密封する平面シールである密封装置を有する密封構造であり、
前記密封装置は、
高圧側に配置されるゴム状弾性体製のシール部材と、
前記シール部材に隣接して、当該シール部材よりも低圧側に装着される樹脂製のバックアップリングと、を備え、
前記バックアップリングは、切欠部を有する有端リング状であり、
前記切欠部は、前記バックアップリングの厚さ方向に平行に延び、且つ、前記バックアップリングの径方向と交差するように延びており、
前記シール部材と前記バックアップリングは、それぞれ、前記2つの部材から加圧された状態で当該2つの部材の間に配置されている、密封構造。 - 前記切欠部は、前記バックアップリングの径方向とのなす角度が3~45°となるように交差している、請求項1に記載の密封構造。
- 前記バックアップリングは、その外面が、前記環状溝の低圧側の側面と接するように配置されている、請求項1または2に記載の密封構造。
- 2つの部材のうちの一方の部材に設けられた環状溝内に配置されて、これら2つの部材間の隙間を密封する平面シールである密封装置を有する密封構造であり、
前記環状溝における底面の低圧側には、低圧側に向かって拡径するテーパー面が設けられており、
前記密封装置は、
高圧側に配置されるゴム状弾性体製のシール部材と、
前記シール部材に隣接して、当該シール部材よりも低圧側に装着される樹脂製のバックアップリングと、を備え、
前記バックアップリングの底面は、前記バックアップリングの一方の開口から他方の開口に向かって拡径するテーパー面であり、
前記バックアップリングの前記テーパー面は、前記環状溝の前記テーパー面とのなす角度が、0°超であり、
前記バックアップリングは、その外面が、前記環状溝の低圧側の側面との間に隙間を有するように配置され、
前記シール部材と前記バックアップリングは、それぞれ、前記2つの部材から加圧された状態で当該2つの部材の間に配置されている、密封構造。 - 前記バックアップリングの前記テーパー面は、前記環状溝の前記テーパー面とのなす角度が、5~25°である、請求項4に記載の密封構造。
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KR1020227036277A KR20220156054A (ko) | 2020-06-05 | 2021-04-22 | 밀봉 구조 |
CN202180018749.7A CN115280042A (zh) | 2020-06-05 | 2021-04-22 | 密封结构 |
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JPH1068467A (ja) * | 1996-06-21 | 1998-03-10 | Nok Corp | シール装置 |
JP2001161585A (ja) * | 1999-12-14 | 2001-06-19 | Toto Ltd | 水回り器具の接続構造。 |
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JP2013036603A (ja) | 2011-07-13 | 2013-02-21 | Yachiyo Industry Co Ltd | 圧力容器 |
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US2437814A (en) * | 1944-05-25 | 1948-03-16 | Lockheed Aircraft Corp | Sealing means |
JPS5836660U (ja) * | 1981-09-02 | 1983-03-10 | エヌオーケー株式会社 | バツクアツプリング |
JP4877474B2 (ja) * | 2005-11-14 | 2012-02-15 | Nok株式会社 | 炭酸ガスシール用密封装置 |
JP4877473B2 (ja) * | 2005-11-14 | 2012-02-15 | Nok株式会社 | 密封装置 |
US20070222162A1 (en) * | 2006-03-24 | 2007-09-27 | Stoner Jack C | Back-up ring and sealing assembly |
US9995394B2 (en) * | 2012-01-18 | 2018-06-12 | Halliburton Energy Services, Inc. | Seal ring backup devices and methods for preventing extrusion |
US10520086B2 (en) * | 2017-07-11 | 2019-12-31 | T-Lon Products, Inc. | Apparatus and systems for preventing extrusion |
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2021
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JPS5789553U (ja) * | 1980-11-21 | 1982-06-02 | ||
JPH1068467A (ja) * | 1996-06-21 | 1998-03-10 | Nok Corp | シール装置 |
JP2001161585A (ja) * | 1999-12-14 | 2001-06-19 | Toto Ltd | 水回り器具の接続構造。 |
WO2004061353A1 (ja) * | 2002-12-27 | 2004-07-22 | Nok Corporation | 接続装置 |
JP2004225852A (ja) | 2003-01-24 | 2004-08-12 | Toyota Industries Corp | 高圧タンク |
JP2013036603A (ja) | 2011-07-13 | 2013-02-21 | Yachiyo Industry Co Ltd | 圧力容器 |
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JP7338060B2 (ja) | 2023-09-04 |
KR20220156054A (ko) | 2022-11-24 |
US20230057490A1 (en) | 2023-02-23 |
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