WO2004011827A1 - シールリング - Google Patents
シールリング Download PDFInfo
- Publication number
- WO2004011827A1 WO2004011827A1 PCT/JP2003/009469 JP0309469W WO2004011827A1 WO 2004011827 A1 WO2004011827 A1 WO 2004011827A1 JP 0309469 W JP0309469 W JP 0309469W WO 2004011827 A1 WO2004011827 A1 WO 2004011827A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- line contact
- seal ring
- separation
- contact portion
- arc
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
-
- 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
- F16J15/16—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
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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
- F16J15/44—Free-space packings
- F16J15/441—Free-space packings with floating ring
-
- 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
- F16J9/12—Details
- F16J9/14—Joint-closures
-
- 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
- F16J9/12—Details
- F16J9/20—Rings with special cross-section; Oil-scraping rings
Definitions
- the present invention relates to a seal ring for sealing an annular gap between two members provided so as to be relatively rotatable relative to each other.
- FIG. 34 is a schematic plan view of a seal ring according to the related art
- FIG. 35 is a schematic cross-sectional view illustrating a state where the seal ring according to the related art is mounted.
- the illustrated seal ring 100 is for sealing an annular gap between the housing 200 provided with the shaft hole and the shaft 300 inserted into the shaft hole. It is used by being attached to an annular groove 301 provided in 00.
- the seal ring 100 is made of a resin material, and is provided with a first seal portion 101 for sealing the side wall surface of the annular groove 310 provided on the shaft 300 and a housing 200. A second sealing portion 102 for sealing the inner peripheral surface of the provided shaft hole.
- the seal ring 100 becomes non-sealed. Since it is pressed against the fluid side A to be sealed, the first seal portion 101 presses the side wall surface of the annular groove 301, and the second seal portion 102 faces the housing facing the annular groove 301. The inner peripheral surface of the shaft hole provided in 200 is pressed to seal at each position.
- the fluid to be sealed is, for example, lubricating oil, and particularly refers to ATF when used in an automatic transmission of an automobile.
- the ring body of the seal ring 100 is provided with a separation portion S0 at one location in the circumferential direction for the purpose of improving incorporation and the like.
- a separating portion S0 Various forms of such a separating portion S0 are known as a force S, and the force is applied in a two-step configuration so as to be able to suitably cope with changes in ambient temperature. Also, special step cuts are known.
- the seal ring is circular due to the difference in the linear expansion coefficient due to the difference in the material of the seal ring and the housing. Even if they move relative to each other in the circumferential direction, the amount of dimensional change can be absorbed by the amount of the gap while maintaining the sealed state, so that the sealing performance can be suitably maintained even when the ambient temperature changes.
- the sealing ring 1 Sliding between the first seal portion 100 and the side wall surface of the annular groove 301 due to the relative rotation of the shaft 300 and the shaft 300, especially the side wall surface of the annular groove 301 is worn. Had been done.
- a groove for supplying lubricating oil, which is a fluid to be sealed, between the first seal portion 101 and the side wall surface of the annular groove 301 is provided.
- a technique for improving abrasion resistance by forming a lubricating film for example, Japanese Patent Application Laid-Open No. Hei 9-96663.
- FIG. 36 is a schematic view of a seal ring according to the conventional technology
- FIG. 36A is a schematic partial plan view
- FIG. 36B is a bb cross-sectional view of FIG. 36A
- FIG. 36C is FIG.
- FIG. 2 is a side view as viewed from an I direction of A.
- the communication groove 101a may be interrupted, lubricating oil may not be supplied, and abnormal wear may occur.
- a sealing ring 400 having a trapezoidal cross section is also known.
- the seal ring 400 is formed for the purpose of making the seal portion 402 come into line contact, and the seal portion 400 is formed at the upper end edge of the annular groove 301. Form 0 2.
- the gap T 0 is about 0.2 to 0.6 mm in width, and the leakage amount in that case is 200 to 500 cc Zm in (0.2 to 0. 5 1 / in).
- the leakage amount of a seal ring having a general special step force separation part is 100 cc / min (0.1 l Zmin) or less, and in such a case, the leakage amount is excessive. Therefore, it is difficult to deal with normal hydraulic pump capacity.
- the present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to reduce the amount of leakage while reducing the rotational sliding friction, thereby providing a stable seal for a long period of time.
- An object of the present invention is to provide a high-quality seal ring that maintains performance. Disclosure of the invention
- the present invention is a.
- One of the two members that are mounted concentrically and relatively rotatable A first seal portion for sealing a side wall surface of the annular groove provided on the material on the side of the fluid to be unsealed,
- a second sealing portion for sealing the surface of the other member of the two members
- a seal ring for sealing an annular gap between the two members by these seal portions
- a line contact portion linearly in contact with a side wall surface of the annular groove on the non-sealing target fluid side is provided continuously over the entire circumference from one side to the other side of the separation portion,
- a line contact portion provided on one side of the separating portion and a line contact portion provided on the other side of the separating portion are provided apart from each other in a radial direction.
- the first seal portion is a line contact portion that linearly contacts the side wall surface of the annular groove on the side of the non-sealed fluid, the pressure receiving area of the sliding portion can be reduced. Therefore, it is possible to improve the formation of the lubricating film by the lubricating oil, and to reduce the rotational sliding friction. Also, even if foreign matter enters the sliding portion, it can be easily discharged.
- the amount of leakage (leakage amount) of the fluid to be sealed can be controlled by the size of the gap formed by the line contact portion being provided radially apart in the separation portion.
- the gap formed by the radial contact of the line contact portion in the separation portion is defined as a line contact portion provided on one side of the separation portion and a line contact portion provided on the other side.
- Part and one side line contact Is a space formed by the side surface of the ring main body between the portion and the line contact portion on the other side, and the side wall surface of the annular groove on the side of the fluid to be sealed, which has a radial cross-section. The amount of leakage can be adjusted by adjusting the size of the cross-sectional area.
- the line contact portion provided on one side of the separation portion and the line contact portion provided on the other side should have an area overlapping when projected in the radial direction. Become.
- the space can be formed into a column shape, that is, the leak path becomes a column shape, and the oil flow resistance of the leak path is increased. can do. Therefore, the leak amount can be further suppressed.
- the line contact portion does not have an overlapping area when projected in the radial direction, that is, even when the separation portion is not provided up to the separation end in the circumferential direction, one side of the separation portion and the other end are not provided. If the line contact portion with the side is separated in the radial direction, a space is formed and a leak path is formed, so that the amount of leak can be adjusted.
- the line contact portion has a substantially mountain shape that protrudes from the side surface of the sealing ring main body toward the side wall surface of the annular groove on the non-sealing target fluid side.
- the sealing ring body includes a separation part.
- line contact will be described.
- the line contact part since it is elongated and connected to the side wall surface of the annular groove on the side of the fluid to be sealed, it is expressed as line contact, It has a width. Practically, when the line contact portion comes into contact with the side wall surface of the annular groove on the non-sealed fluid side, it comes into contact with a surface with a small width (when the line contact portion has a small width). There is also a force s.
- the term “line contact” is also used to distinguish it from the case of contacting the entire surface of the ring body as in the past.
- the line contact portion provided on one side of the separation portion is provided on the other member side than the line contact portion provided on the other side of the separation portion, and one member is provided on the other side of the separation portion from the other side. It is also preferable that it is mounted so as to rotate toward one side via the other separation end.
- the opposite of the direction of the leakage path and the direction of rotation of one member means that the opening formed by the line contact portion between one side and the other side of the separation portion on the other member side of the ring body. This means that the member is facing the direction of rotation.
- a first arc-shaped convex portion projecting in the circumferential direction is provided at the one separated end portion provided with the line contact portion, and the first arc-shaped convex portion is provided on the other side.
- a first arc-shaped concave portion is provided at the separated end portion to be fitted with the first arc-shaped convex portion, and a second arc-shaped convex portion projecting in the circumferential direction is provided on the first arc-shaped convex portion.
- the second arc-shaped concave portion is fitted to the first arc-shaped concave portion. It is also preferable to provide a second arc-shaped concave portion.
- the first arc-shaped convex portion is a separation end on one side when one member is mounted so as to rotate toward the one side from the other side of the separation portion via the separation end. It is provided in the department.
- the line contact portion is provided up to the second arc-shaped convex portion.
- an arc-shaped convex portion that protrudes in the circumferential direction is provided at one separating end of the separating portion
- an arc-shaped concave portion that fits with the arc-shaped convex portion is provided at the other separating end of the separating portion. It is also preferable that a projection is provided on one of the fitting surfaces where the arc-shaped convex portion and the arc-shaped concave portion are fitted, so as to linearly contact the other surface.
- the linearly contacting projection does not penetrate the foreign substance. Even if a foreign object gets stuck, the foreign matter is easily ejected (the state of being stuck is easily released) because the foreign object will get stuck in the linearly contacting part.
- the shape of the projection is preferably, for example, a substantially wedge-shaped cross section in which the thickness gradually decreases toward the other surface.
- the protrusions that come into linear contact with the other surface may be provided on only one of the fitting surfaces where the arc-shaped convex portion and the arc-shaped concave portion are fitted. It may be provided on the joint surface.
- the fitting surface is a surface that is substantially perpendicular to the axis and extends in the circumferential direction.
- a first line contact portion provided continuously from one side to the other side of the separation portion and linearly abutting on a side wall surface of the annular groove on the non-sealing target fluid side;
- the separating portion On the groove bottom side of the annular groove relative to the first line contact portion, the separating portion is provided continuously from one side to the other side of the separating portion, and is linearly formed on the side wall surface of the annular groove on the non-sealing target fluid side.
- a second line contact portion that abuts;
- the line contact portion provided on one side of the separation portion is the first line contact portion, and the line contact portion provided on the other side of the separation portion is the second line contact portion. It is also preferred.
- the special step cut is a separation structure in which a step-shaped separation portion is formed on each of the two sealing surfaces of the seal ring.
- the separation portion includes a separation surface extending in the circumferential direction, and the separation edge of the separation portion is formed on the sealing surface of the annular groove with respect to the side wall surface on the side of the non-sealing target fluid on the side of the stepped separation portion. It is formed as a part.
- a step cut is two seals on a seal ring.
- This is a separation structure in which a step-shaped separation portion is formed on the sealing surface side of the annular groove with respect to the side wall surface side of the non-sealing target fluid side of the annular groove.
- the separation portion includes a separation surface extending in the circumferential direction, and the separation edge is formed as a part of the step-like separation portion.
- the two members that are concentrically and relatively rotatably assembled mean, for example, a housing provided with a shaft hole and a shaft inserted into the shaft hole.
- the annular groove is provided on either the housing or the shaft, but may be provided on both.
- FIG. 1 is a plan view of a seal ring according to the first embodiment of the present invention
- FIG. 2 is a partially broken perspective view showing a state in which a seal ring according to the first embodiment of the present invention is mounted
- FIG. 3 is a cross-sectional view of the seal ring shown in FIG. 1, taken along line 3-3.
- FIG. 4 is a cross-sectional view of the seal ring shown in FIG. 1, taken along line 4.
- FIG. Yes is a cross-sectional view of the seal ring shown in FIG. 1, taken along line 4.
- FIG. 6 is a plan view showing a modification of the seal ring according to the first embodiment of the present invention.
- FIG. 7 is a sectional view taken along line 7-7 of the seal ring shown in FIG. 6,
- FIG. 8 is a sectional view taken along line 8-8 of the seal ring shown in FIG. 6, and
- FIG. 9 is a second embodiment of the present invention.
- FIG. 4 is a partially cutaway perspective view showing a state in which a seal ring according to the embodiment is mounted;
- Figure 10 shows the separation section (the cross-section 3-3 of the seal ring shown in Figure 1). It is a cross-sectional view,
- FIG. 11 is a cross-sectional view corresponding to 4-1 section of the seal ring shown in FIG.
- FIG. 12 is an enlarged view of a portion H in FIG. 11,
- FIG. 13 is a schematic diagram for explaining a problem in the third embodiment of the present invention.
- FIG. 14 is a partially cutaway perspective view showing a state in which a seal ring according to a third embodiment of the present invention is mounted.
- FIG. 15 is a partially cutaway perspective view showing a state in which the separation portion is separated to explain the configuration of the separation portion of the seal ring according to the third embodiment of the present invention.
- FIG. 16 is a partially cutaway perspective view showing a mounted and attached state of a seal ring according to the fourth embodiment of the present invention.
- FIG. 17 is a partially cutaway perspective view showing a state in which the separation portion is separated in order to explain the configuration of the separation portion of the seal ring according to the fourth embodiment of the present invention.
- FIG. 18 is a schematic diagram showing an example of a durability test apparatus.
- FIG. 19 is a schematic diagram for explaining a problem in the fifth embodiment of the present invention.
- FIG. 20 is a partially broken perspective view showing a state in which a seal ring according to a fifth embodiment of the present invention is mounted.
- FIG. 21 is a partially cutaway perspective view showing a state in which the separation unit is separated to explain the configuration of the separation unit of the seal ring according to the fifth embodiment of the present invention. Is a cross-sectional view of a separation part (corresponding to a cross section 3-3 of the seal ring shown in FIG. 1).
- FIG. 23 is a partially broken top view showing a state in which a seal ring according to a fifth embodiment of the present invention is mounted.
- FIG. 24 is an enlarged view of a W portion of the seal ring shown in FIG. 23, and FIG. 25 is a diagram illustrating a case where a single rip ′ portion is provided in the fifth embodiment of the present invention.
- FIG. 25 is a diagram illustrating a case where a single rip ′ portion is provided in the fifth embodiment of the present invention.
- FIG. 26 is a partially broken top view showing a case where one rip portion is provided in the fifth embodiment of the present invention.
- FIG. 27 is a partially broken perspective view showing a state in which a seal ring according to a sixth embodiment of the present invention is mounted.
- FIG. 28 is a partially cutaway perspective view showing a state in which the separation portion is separated to explain the configuration of the separation portion of the seal ring according to the sixth embodiment of the present invention.
- Fig. 29 is a cross-sectional view of the separation part (corresponding to the section 3-3 of the seal ring shown in Fig. 1).
- FIG. 30 is a plan view of a seal ring according to a seventh embodiment of the present invention.
- FIG. 31 is a partially cutaway perspective view showing a state in which a seal ring according to a seventh embodiment of the present invention is mounted.
- FIG. 32 is a sectional view of the seal ring shown in FIG.
- FIG. 33 is a cross-sectional view of the seal ring shown in FIG.
- FIG. 34 is a diagram illustrating a seal ring according to the related art
- FIG. 35 is a diagram illustrating a seal ring according to the related art
- FIG. 36 is a diagram illustrating a seal ring according to the related art.
- FIG. 37 is a diagram showing a seal ring according to the related art.
- FIG. 38 is a diagram illustrating a seal ring according to the related art
- FIG. 39 is a diagram illustrating a seal ring according to the related art.
- FIG. 1 is a plan view of a seal ring 1 according to a first embodiment of the present invention
- FIG. 2 is a partially cutaway perspective view showing a mounted state of the seal ring 1 according to the present embodiment
- FIG. 4 is a sectional view of the seal ring 1 shown in FIG. 3
- FIG. 4 is a sectional view of the seal ring 1 shown in FIG. 4
- FIG. 5 is an enlarged view of a portion C in FIG.
- the sealing ring 1 seals an annular gap between the housing 80 as the other member provided with the shaft hole and the shaft 70 as one member inserted into the shaft hole. This is mounted on an annular groove 71 provided on the shaft 70 and used.
- the seal ring 1 is made of a resin material, and includes a first seal portion 4 for sealing a side wall surface 72 of the annular groove 71 provided on the shaft 70 on the fluid side A to be unsealed, and A second seal portion 3 for sealing the inner peripheral surface 81 of the shaft hole provided in the housing 80.
- the fluid to be sealed is, for example, lubricating oil, and particularly refers to ATF when used for a transmission of an automobile.
- the ring body of the seal ring 1 is provided with a separation part 2 at one location in the circumferential direction for the purpose of improving the assembling property and the like.
- This special step force is provided with a pair of left and right (axial) convex portions 21 and concave portions 22 on the outer peripheral side of one side via the separated portion, and concave portions 24 and convex portions on the other side.
- the parts 23 are provided in pairs on the left and right.
- the projection 21 and the recess 24 are fitted together, and the recess 22 and the projection 23 are fitted together.
- the surfaces perpendicular to the circumferential direction are spaced from each other in the circumferential direction (in FIG. 2, the top surface 21 a of the convex portion 21 and the concave portion 24 opposed thereto).
- the gap 27 formed by the facing surface 24 a, the gap 28 formed by the tip surface of the convex portion 23 and the facing surface of the concave portion 22 opposed thereto, and the gap 29 on the inner peripheral side) And shuts off the fluid side O to be sealed and the fluid side A to be unsealed.
- the convex portion 21 and the concave portion 24 slide on the separation surface 25 concentric with the second seal portion 3 and also on the separation surface 26 perpendicular to the axis. It is configured to be in sliding contact.
- the sealing surfaces of both the second seal portion 3 and the first seal portion 4 are interrupted by the separation portion 2. There is no part to end.
- the sealing performance can be maintained even when the ambient temperature changes.
- the first seal portion 4 is constituted by a line contact portion 41 that linearly contacts the side wall surface 72 of the annular groove 71.
- the line contact part 41 is located on the side of the side wall surface 72 of the annular groove 71 from the non-sealing target fluid side A of the second seal part 3 and has an inner diameter.
- Side (slot bottom side) and the inner peripheral surface 5 of the seal ring 1 and the side of the annular groove 7 1 from the corner that is the fluid side A to be unsealed 7 2 side is formed by a mountain-shaped portion (projecting portion) formed by an inclined surface 43 inclined toward the outer diameter side (opening side of the groove).
- the line contact portion 41 is inclined at the convex portion 21 from the non-sealing target fluid side A of the second seal portion 3 to the side wall surface 72 side of the annular groove 71 toward the groove bottom side.
- the end face A of the non-sealing target fluid side of the projection 21 formed to extend outward from the corner part 47 which is the non-sealing target fluid side A of the surface 42 and the separation surface 25 of the projection 21.
- the outer peripheral end of the outer peripheral side of the annular groove 7 is formed on the side wall surface 72 of the annular groove 7 1 and the inclined surface 4 4 inclined toward the outer radial side. ing.
- the line contact portion 41 extends from the corner portion 47, which is the non-sealing target fluid side A of the separation surface 25 of the concave portion 24, to the side wall surface 72 side of the annular groove 71.
- the line contact portion 41 provided in the convex portion 21 is the line contact portion 41a
- the line contact portion 41 provided in the concave portion 24 is the line contact portion 41b
- the seal ring is the line contact part 41c.
- the line contact portions 4 1 a, 4 1 b, and 4 1 c are provided continuously in the first seal portion 4, and as shown in the figure, the line contact portions 4 1 a, 41 b is provided in the radial direction so as to form a leak path R (see FIG. 2) between the line contact portions 41 a and 41 b.
- the radial length between the line contact portions 41a and 41b is a
- the radial length of the end face 48 of the convex portion 21 on the non-sealed fluid side is b
- the wire contact portion is The length in the axial direction from 4 1 to the non-sealing target fluid side
- a end surface 48 of the convex portion 21 is c, dimensions &, 1) and (: S is the cross-sectional area determined by The radial length from 3 to the line contact part 4 1a (or the line contact part 4 1b) is 1, the angle formed by the inclined surface 4 3 with respect to the plane perpendicular to the axis is 0 1, and perpendicular to the axis
- the angle formed by the inclined surface 42 with respect to the basic surface is ⁇ 2.
- the cross section S determined by the dimensions a, b, and c is the line contact part 41 a, 41 b and the non-sealing target fluid side A end face 48 of the convex part 21 and the side of the annular groove 71.
- This is a radial cross section of the space formed by the wall surface 72, that is, a cross section of a leak path formed by providing the line contact portions 41a and 41 in the separation portion 2 apart from each other in the radial direction. It is. Therefore, the leak amount can be controlled by appropriately adjusting the area of the cross section S.
- Adjusting the area of the cross section S means adjusting the dimensions a, b and c.
- the dimensions a, b and c are desirably small from the viewpoint of reducing the leakage amount. However, if they are too small, foreign substances in the fluid to be sealed cannot pass.
- the dimensions b and c are suitably from 0.1 to 0.5 mm, preferably from 0.15 to 0.3 mm. Also, considering the ease with which foreign matter passes and the reduction of leak amount, the dimensions! ) And dimension c should be approximately equal.
- the releasability during molding is improved.
- the dimension 1 is desirably small in order to reduce the drag torque generated by the relative rotation between the shaft and the seal ring.
- the seal ring may be twisted and deformed by the pressure of the fluid to be sealed. If the angles 01 and 02 of the seal ring side surface are too small, the line contact state may not be maintained if the seal ring is twisted and deformed by the pressure of the fluid to be sealed. If the angles 01 and 2 of the side surfaces of the seal ring are too large, the cross-sectional area of the seal ring will decrease, and it will be difficult to form the seal ring.
- angle 0 1 and 0 2 are not to desirable to 5-2 0 degrees 0
- FIG. 5 is an enlarged view of the portion C in FIG. 4, and the line contact portion 41 is enlarged.
- the tip of the wire contact part 41 has a predetermined width in the radial direction, and the width 1 s is set to 0.05 to 0.3 in consideration of the amount of leakage and foreign matter discharge.
- mm preferably 0.1 to 0.2 mm.
- both ends of the line contact portion 41 are chamfered to R 0.1 or less.
- the line contact portion 41 is located on the outer peripheral side of the side surface of the ring from the region where the separation portion 2 is not formed to the concave portion 24 in the seal ring 1. Is provided through a transition portion 4 1 d that transitions from the line contact portion 4 1 c to the line contact portion 4 1 b located on the inner peripheral side, but is not limited to this.
- the line contact portions 4 1a and 4 1b provided on the outer surface do not overlap on the circumference, that is, the line contact portions 4 1a and 4 1b are separated from each other in the radial direction.
- the projection 21 and the recess 24 are provided with the line contact portions 41 up to the separation ends in the circumferential direction, respectively.
- the line contact portions 4 la and 41 b provided in the portion 21 and the concave portion 24 overlap each other, the present invention is not limited to this.
- the line contact portion may not be provided to the separation end in the circumferential direction, and the cross-sectional portion S forming the leak path in the cross-sectional shape of the separation portion 2 It only has to be formed. Further, even when the line contact portions provided on the convex portion 21 and the concave portion 24 do not overlap when projected in the radial direction, the line contact portions provided on the convex portion 21 and the concave portion 24 do not overlap. If they are separated in the direction, a leak path is formed, so that it is possible to control the amount of leakage by adjusting the cross section S assuming that the cross section S is formed.
- a flat surface M having a flat radial surface may be provided on the inner peripheral side as shown in FIGS.
- Fig. 6 is a plan view showing the seal ring 1A with improved releasability
- Fig. 7 is a sectional view taken along the line 7-7 of the seal ring 1A shown in Fig. 6, and
- Fig. 8 is 8 of the seal ring 1A shown in Fig. 6.
- -It is an 8 sectional view.
- the protrusion pin for release comes into contact with this flat surface M, so that the protrusion pin does not come into contact with the inclined surface constituting the line contact portion 41, so that the shape of the seal ring is damaged. It can be released without any mold release.
- a resin composition including a heat-resistant resin and a filler can be used as a material forming the seal ring 1.
- the heat resistant resin for example, aromatic polyether ketone resin such as polyacryl ether resin (PEN), polyether ether ketone (PEEK) resin, aromatic thermoplastic polyimide resin, Polyamide 416 resin, polyphenylene sulfide resin, polytetrafluoroethylene resin, and other resins that have excellent heat resistance, flame resistance, chemical resistance, and excellent mechanical properties.
- aromatic polyether ketone resin such as polyacryl ether resin (PEN), polyether ether ketone (PEEK) resin, aromatic thermoplastic polyimide resin, Polyamide 416 resin, polyphenylene sulfide resin, polytetrafluoroethylene resin, and other resins that have excellent heat resistance, flame resistance, chemical resistance, and excellent mechanical properties.
- the filler is added for the purpose of improving the mechanical strength of the material, improving the abrasion resistance, imparting low friction characteristics, and the like, and is not particularly limited.
- the first seal portion 4 is a line contact portion that linearly contacts the side wall surface 72 of the annular groove 71, the pressure receiving area of the sliding portion can be reduced. Can be. Therefore, the formation of the lubricating film by the lubricating oil can be improved, and the rotational sliding friction can be reduced. Also, even if foreign matter enters the sliding part, it can be easily discharged.
- the amount of leak can be controlled by the size of the gap formed by providing the line contact portion in the separation portion at a distance in the radial direction.
- the size of the gap formed by the line contact portions being provided apart in the radial direction at the separation portion is the above-described cross-sectional portion S, that is, by adjusting the dimensions a, b, and c, The amount can be controlled.
- the line contact portions 41a and 41b provided in the convex portion 21 and the concave portion 24 are provided so as to overlap with each other, so that the line contact portion 41 a, 4 1 b and non-dense
- the line contact portion when the line contact portion is projected in the radial direction, the length in the circumferential direction where the line contact portions 41 a and 41 b provided in the convex portion 21 and the concave portion 24 overlap is adjusted. By doing so, the amount of leakage can be controlled.
- the leak amount can be further reduced.
- FIG. 9 is a partially cutaway perspective view showing a mounted state of the sealing ring 1B according to the present embodiment
- FIG. 10 is a separation portion (corresponding to a section 3-3 of the sealing ring 1 shown in FIG. 1).
- 11 is a cross-sectional view corresponding to the 414 cross section of the seal ring shown in FIG. 1
- FIG. 12 is an enlarged view of a portion H in FIG.
- the seal ring 1 has a substantially rectangular cross-sectional shape, and an annular groove is formed on the side surface of the non-sealing target fluid side A of the seal ring having a substantially rectangular cross-section.
- a line contact portion that linearly contacts the side wall surface 72 of 71 is provided.
- the first seal portion 4 is a side surface of the non-sealing target fluid side A of the seal ring having a substantially rectangular cross section. From the side wall surface 72 of the annular groove 71, and is constituted by a line contact portion 41 linearly contacting the side wall surface 72.
- the line contact part 41 is formed in the annular groove at a position of a length 1 from the non-sealing target fluid side A of the second seal part 3 to the inner diameter side. It is constituted by a mountain-shaped portion protruding toward the side wall surface 72 of 71.
- the line contact portion 41 extends from the non-sealing target fluid side A of the second seal portion 3 to a position of a length 1 from the non-sealing target fluid side A of the second seal portion 3 toward the side wall surface 72 of the annular groove 71 in the convex portion 21. It is composed of a projecting mountain-shaped part.
- the line contact portion 41 is located on the non-sealing target fluid side A of the separation surface 25 of the concave portion 24, and has a mountain shape protruding from the non-sealing target fluid side A side surface of the seal ring. It is constituted by a shape part.
- the line contact portion 41 provided on the convex portion 21 is replaced with the line contact portion 41a, and the line contact portion 41 provided on the concave portion 24 is replaced with the line contact portion.
- the line contact portion 41 provided in the region where the separation portion 2 is not formed in the sealing ring 1B will be described as a line contact portion 41c.
- the line contact portions 4 l a, 41 b, 41 are provided continuously in the first seal portion 4, and as shown in the figure, the wire contact portions 41 a and 41 b in the separation portion 2 A leak path R (see Fig. 9) is formed between the contact portions 41a and 41b.
- the radial length between the wire contact portions 41a and 41b is a
- the line-shaped contact part 41 a rises from the corner 47 on the inner diameter side end (boundary between the side and the mountain-shaped part) B is the length in the radial direction of the end face 48
- c is the axial length from the line contact part 41 to the end face 48 of the convex part 21 on the non-sealed fluid side A, and the dimensions are a and b.
- S is the cross section determined by c and c
- 1 is the radial length from the second seal portion 3 to the wire contact portion 41a (or the wire contact portion 41c).
- Adjusting the area of the cross section S means adjusting the dimensions a, b and c.
- dimension a, dimension b, dimension c, and dimension 1 are the same as in the first embodiment.
- FIG. 12 is an enlarged view of a portion H in FIG. 11, in which the line contact portion 41 is enlarged.
- the tip of the wire contact portion 41 has a predetermined width in the radial direction, and the width 1 s is set to 0.05 to 0.3 in consideration of the suppression of the leak amount and the foreign matter discharging property.
- mm preferably 0.1 to 0.2 mm.
- both ends of the line contact portion 41 be chamfered to R 0.1 or less.
- the angle of rise of the mountain-shaped portion constituting the line contact portion 41 from the side surface of the ring is 90 degrees ⁇ ] 3 ⁇ 180 degrees, preferably 95 degrees, in consideration of mold release properties. ] 3 degrees is appropriate.
- Comparative Example 1 a seal ring 100 having a substantially rectangular cross section injection-molded using polyetheretherketone (PEEK) containing several kinds of fillers (see FIG. 34 described in the section of the prior art). The sealing ring shown in 35) was used.
- PEEK polyetheretherketone
- the seal ring 100 formed as Comparative Example 1 was subjected to additional processing to obtain the seal ring 1 shown in FIGS. 1 to 5 in the first embodiment.
- Comparative Example 2 a seal ring 400 with additional processing was applied to the seal ring 100 molded as Comparative Example 1 (see FIGS. 38 and 39 described in the section of the prior art). The seal ring shown) was used.
- the outer diameter, wall thickness, and height of the seal ring are the same in this embodiment and Comparative Examples 1 and 2, and the separation part (aperture shape) is special in both this embodiment and Comparative Examples 1 and 2. It is a step cut.
- Table 1 shows the test results. Note that 1 0 0 0 c c Zm i n
- the depth of wear of the aluminum shaft was significantly smaller than that of Comparative Example 1, and the same amount of leak was less than half of that of Comparative Example 2 with the same amount of leakage. It was confirmed that aluminum shaft wear depth was achieved.
- the seal ring When handling the seal ring, for example, when transporting the seal ring or assembling the seal ring into the annular gap between the two members, the seal ring may be damaged such as dents and indentations. In particular, in the case of a seal ring having a separation part, the end of the separation part may be damaged.
- FIG. 13 is a schematic diagram for explaining the problem.
- the sealing ring 1 In the case where a scratch such as a dent or an indentation is made on the part I shown in Fig. 13, it is present in the fluid to be sealed from the part where the scratch was made to between the line contact parts 41a and 41b. Foreign matter is easy to enter.
- the line contact portions 41a. And 41b in the separation portion 2 are provided apart from each other in the radial direction to form a leak path R between the line contact portions 41a and 41b. If the leak path R and the rotation direction of the shaft are the same, that is, if the sliding direction of the shaft with respect to the seal ring is the J direction shown in Fig. 13, Foreign matter existing in the wire contact portions 41a and 41b tends to be easily sent.
- the leak path R formed between the line contact parts 41a and 41b and the rotation direction of the shaft are opposite, that is, the sliding direction of the shaft ⁇ 0 is It is preferable that it is configured to be in the K direction shown in FIG. That is, it is preferable to mount the seal ring so as to be located on the downstream side in the sliding direction of the shaft 70, with the convex portion 21 force S for sealing the side wall surface 72 on the non-sealing target fluid side A.
- a plurality of seal rings are usually used in a set, there is a concern that the work of attaching the seal rings according to the rotation direction of the shaft may cause a decrease in work efficiency.
- a convex portion in which an outer peripheral portion protrudes in the circumferential direction with respect to an inner peripheral portion of the separation portion 2 and an outer peripheral portion with respect to the inner peripheral portion of the separation portion 2 By providing a concave portion which is recessed in the circumferential direction to fit the convex portion, the separating portion is provided with directionality with respect to the seal ring 1 according to the first embodiment. This is to explain the seal ring 1C.
- FIG. 14 is a partially cutaway perspective view showing a state where a seal ring 1C according to a third embodiment of the present invention is mounted
- FIG. 15 is a configuration of a separation portion of the seal ring 1C according to the present embodiment
- FIG. 4 is a partially cutaway perspective view showing a state in which a separation unit is separated to explain the above.
- the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- the special step cut employed in the separation part 2 of the seal ring 1C according to the present embodiment is such that, on the outer peripheral side of the ring main body, one side of the separation part 2 is attached to the peripheral end 2c of the ring main body.
- the convex portion 2a protrudes in the circumferential direction, and the other side is recessed with respect to the inner peripheral end 2c of the ring body to form a concave portion 2b into which the convex portion 2a fits.
- the convex portion 2a constitutes a first arc-shaped convex portion
- the concave portion 2b constitutes a first arc-shaped concave portion.
- the convex portion 2a is provided with a pair of left and right (axial direction) convex portions 21 and concave portions 22.
- the concave portion 2b It has a pair of recesses 2 and protrusions 23 on the left and right.
- the convex portion 21 and the concave portion 24 are fitted, and the concave portion 22 and the convex portion 23 are fitted.
- the convex portion 21 constitutes a second arc-shaped convex portion
- the concave portion 24 constitutes a second arc-shaped concave portion.
- the first seal portion 4 is constituted by a line contact portion 41 that linearly contacts the side wall surface 72 of the annular groove 71.
- This is the same as the seal ring 1, and the line contact portions 41a, 41b, 41c constituting the line contact portion 41 are provided continuously in the first seal portion 4, and are separated from each other.
- the wire contact portions 41a and 41b are separated in the radial direction to form a leak path R (see Fig. 14) between the wire contact portions 41a and 41b. are doing.
- the cross-sectional shape of the line contact portion in the separation portion 2 of the sealing ring 1C is the same as that of the sealing ring 1.
- the feature of the present embodiment is that when the seal ring is mounted, the seal ring 1C is mounted in the annular groove 71 of the shaft 70 in correspondence with the rotation direction of the shaft 70. .
- the convex portion 2 a is located on the downstream side in the rotation direction of the shaft 70, and the convex portion 21 constituting the line contact portion 41 in the convex portion 2 a is formed in an annular shape provided on the shaft 70.
- the groove 71 is provided so as to be located on the side wall surface 72 side of the non-sealing target fluid side A of the groove 71.
- the line contact portions 41 a and 41 b are provided.
- the direction of the leak path R and the rotation direction of the shaft are opposite.
- the direction in which the direction of the leak path R and the rotational direction of the shaft are opposite to each other means that the opening formed by the line contact portions 41a and 41b on the inner peripheral side of the ring body is the rotational direction of the shaft K If you are facing the direction, it means that you are facing.
- the seal ring is mounted with a dent or indentation on the part I, foreign matter existing in the fluid to be sealed will be removed by the rotation of the shaft. It is not sent between b.
- a protruding convex portion 2a and a concave concave portion 2b are provided on an outer peripheral side of the ring main body with respect to an inner peripheral end 2c.
- the separation portion has a direction rather than a substantially symmetrical shape, and when the seal ring is mounted, the convex portion 2a rotates the shaft. It can be securely mounted on the downstream side in the direction.
- the protruding portion 21 protruding from the protruding portion 2a be on the non-sealing target fluid side A.
- the outer peripheral side of the ring main body is convex, even if the Hfl portion 22 becomes the non-sealing target fluid side A, the direction of the leak path R between the line contact portions and The direction of rotation of the shaft is opposite to the direction of rotation, so that it is possible to prevent foreign matter from entering and to prevent abrasion of the side wall surface 72.
- the convex portion 21 and the concave portion 2 2 (or, respectively, In the Dfl portion 24 and the convex portion 23), the larger the difference in dimension in the circumferential direction, that is, the more the convex portion 21 projects in the circumferential direction, the smaller the leakage amount of the fluid to be sealed can be.
- the influence of this part on the leak amount is smaller than that of the cross section S described in the first embodiment, and thus does not need to be particularly specified.
- FIG. 16 is a partially cutaway perspective view showing a mounted state of a seal ring 1D according to a fourth embodiment of the present invention
- FIG. 17 is a configuration of a separation portion of the seal ring 1D according to the present embodiment
- FIG. 4 is a partially cutaway perspective view showing a state in which a separation unit is separated to explain the above. Note that the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. '
- the cross-sectional shape of the seal ring 1C according to the third embodiment is substantially rectangular as in the seal ring 1B described in the second embodiment, and the cross-sectional shape is substantially rectangular.
- a line contact portion that linearly contacts the side wall surface 72 of the annular groove 71 is provided on the side surface of the non-sealing target fluid side A of the shape sealing ring.
- the seal ring 1D according to the present embodiment has a substantially rectangular cross section, and is similar to the seal ring 1C according to the third embodiment with respect to the inner peripheral side portion of the separation unit 2.
- the outer circumference in the circumferential direction The second embodiment is provided by providing a protruding convex portion and a concave portion in which the outer peripheral side is circumferentially recessed with respect to the inner peripheral side portion of the separating portion and is fitted to the convex portion.
- the separation part is made to have directionality with respect to the sealing ring 1B according to the above.
- a sealing ring 1 shown in FIGS. 1 to 5 in the first embodiment was obtained in the same manner as in Example 1.
- injection molding is performed using polyetheretherketone (PEEK) in which several types of fillers are blended, and then additional processing is performed, so as to be shown in FIGS. 14 to 15 in the third embodiment. Sealed ring 1C was obtained.
- PEEK polyetheretherketone
- each part of the seal ring is the same as those in the first embodiment and the comparative example.
- FIG. 18 is a schematic diagram showing an example of the durability test apparatus.
- a durability test apparatus 90 shown in FIG. 18 is provided with a housing 91 and shafts 93 a and 93 b rotatably mounted on the inner periphery of the housing 91.
- Sealing sample S is mounted on the outer circumference of shafts 93a and 93. Ring grooves 92a and 92b are provided, and the space between the shaft 93a and the shaft 93b is an oil chamber 94 into which the test oil is introduced. Hydraulic pressure is introduced from the opening 95 to the oil chamber 94.
- Table 2 shows the test results performed under the same conditions as in Example 1.
- FIG. 19 is a schematic diagram for explaining the problem.
- FIG. 20 is a partially cutaway perspective view showing a mounted state of a seal ring 1E according to a fifth embodiment of the present invention
- FIG. 21 is a configuration of a separation portion of the seal ring 1E according to the present embodiment
- FIG. 22 is a partially cutaway perspective view showing a state in which the separation portion is separated to explain the following.
- FIG. 22 is a cross-sectional view of the separation portion (corresponding to a section 3-3 of the seal ring shown in FIG. 1)
- FIG. FIG. 24 is a partially broken top view showing a state where the seal ring according to the embodiment is mounted
- FIG. 24 is an enlarged view of a W portion of the seal ring shown in FIG.
- the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- the seal ring 1E according to the present embodiment has a stepped shape (special step force cut).
- a separation part is formed, and a pair of a protrusion 21 and a recess 22 is provided on the outer peripheral side of one side via the separated part on the left and right (axial direction), and a recess 24 is also provided on the other side. And a pair of convex portions 23 on the left and right.
- the projection 21 and the recess 24 are fitted together, and the recess 22 and the projection 23 are fitted together.
- the convex portion 21 forms an arc-shaped convex portion
- the concave portion 24 forms an arc-shaped concave portion.
- the protrusion 21 and the protrusion 23 are opposed to each other on the separation surface 26 perpendicular to the axis, out of the fitting surfaces where the protrusion and the recess fit.
- a projection protruding toward the surface and linearly contacting the opposing surface is provided.
- the projection is formed on the separation surface 26 a facing the projection 23 and perpendicular to the axis in the projection 21 and facing the projection 23 in the axial direction.
- the lip portion 26b has a substantially wedge-shaped cross section, the thickness of which gradually decreases as the distance increases.
- a separation surface 26c opposed to the convex portion 21 and perpendicular to the axis has a cross-section in which the thickness gradually decreases as the distance increases toward the convex portion 21 in the axial direction.
- the lip portion of this is 26 d.
- the lip portions 26b and 26d are provided so as to contact linearly over substantially the entire area in the substantially radial direction of the opposing separation surfaces 26c and 26a, respectively.
- hydraulic pressure P is applied from the side O, the lip portions 26 b and 26 d It is pressed against c, 26a and comes into linear sealing contact.
- the separation part 2 even if foreign matter present in the fluid to be sealed enters the separation part 2, the foreign matter does not enter the separation part 2.
- the surface Q indicated by hatching in FIG. As a result, the line contact portion 41b (the T portion shown in FIG. 19A) is not pressed against the sealing target fluid side O and does not come into contact with the side wall surface 72.
- the protrusion height d of the lip portions 26b and 26d is 0.15 to 0.2 mm.
- the dimension d is not limited as long as the dimension d is set in consideration of the size of the foreign substance existing in the sealed fluid.
- angle 03 of the tip of the lip portions 26b and 26d is preferably 20 to 120 degrees in consideration of formability and durability. , 60-90 degrees.
- the shape of the tips of the lip portions 26 b and 26 d may be R-shaped, but considering the workability of the mold, a flat shape as shown in FIG. A substantially trapezoidal shape provided with a portion may be used, and the angles 04 and 05 in this case are preferably from 90 to 180 degrees, and more preferably from 95 to 120 degrees in consideration of the releasability.
- the dimension f of the flat portion is preferably 0.1 to 0.5 mm, and more preferably 0.15 to 0.3 mm, in consideration of the workability of the mold and the discharge of foreign matter.
- the dimension e in the circumferential direction from the circumferential ends of the convex portions 21 and 23 to the lip portions 26b and 26d is not particularly limited, but the sealing property is taken into consideration. In this case, it is preferable that the diameter be as small as possible, and 0 to: I mm, preferably 0 to 0.5 mm.
- the protrusions 21 and the protrusions 23 are each provided with a protrusion.
- the present invention is not limited to this, and one of the protrusions 21 and 23 may be provided. May be provided.
- FIGS. 25 and 26 show the case where the lip portion 26 b is provided only on the convex portion 21.
- the foreign matter that has penetrated does not stay between the lip portions, and the discharge property of the foreign material is further improved. Also, considering the ease of assembly, it is better to have one rip.
- a protrusion is provided that projects toward the opposing surface and linearly contacts the opposing surface, but is concentric with the second seal portion 3.
- a projection may also be provided on the temporary separation surface 25 to make linear contact.
- seal ring 1E as in the case of the seal ring 1A described with reference to FIGS. 6 to 8, by providing a flat surface M in which the radial surface is flat on the inner peripheral side, the releasability is improved. Can be improved.
- a seal ring having a step-like (special step force cut) separation portion similar to the seal ring 1 according to the first embodiment has been described, but is not limited thereto.
- the present embodiment is also suitably applied to a seal ring in which a step-like (particularly stepping force) separation portion similar to the seal ring 1C according to the third embodiment is formed.
- FIG. 27 is a partially cutaway perspective view showing a state where a seal ring 1F according to a sixth embodiment of the present invention is mounted
- FIG. 28 is a configuration of a separation portion of the seal ring 1F according to the present embodiment
- FIG. 29 is a partially cutaway perspective view showing a state in which the separation portion is separated to explain the above.
- FIG. 29 is a cross-sectional view of the separation portion (corresponding to a section 3-3 of the seal ring shown in FIG. 1).
- the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.
- the sealing ring 1E according to the fifth embodiment has a substantially rectangular cross-sectional shape like the sealing ring 1B described in the second embodiment, and a substantially rectangular cross-section.
- a line contact portion that linearly contacts the side wall surface 72 of the annular groove 71 is provided on the side surface of the non-sealing target fluid side A of the shape sealing ring.
- the seal ring 1F according to the present embodiment has a substantially rectangular cross section, and has a step-shaped (special step cut) separation portion like the seal ring 1E according to the fifth embodiment.
- a pair of left and right (axial) protrusions 21 and recesses 2 2 are provided on the outer peripheral side of one side via the separated portion formed, and the other side also has a recess 24 and a protrusion 2 2. 3 are provided in pairs on the left and right.
- the projection 21 and the recess 24 fit together, and the recess 22 and the projection 23 fit together.
- a seal ring having a step-like (special step cut) separation portion similar to the seal ring 1B according to the second embodiment has been described.
- the present invention is not limited to this.
- the present embodiment is preferably applied to a seal ring in which a step-like (particularly step-cut) separation portion similar to the seal ring 1D according to the fourth embodiment is formed.
- a seal ring formed as a comparative example was subjected to additional processing to obtain a seal ring 1F shown in FIGS. 27 to 29 in the sixth embodiment.
- each part of the seal ring is the same as in this embodiment and the comparative example.
- the wear depth was 10 O / m or less in 10 out of 10 samples, and no remarkable abrasion on the aluminum shaft side was observed.
- the wear depth was kept at 10 ⁇ m or less in 8 out of 10 samples, but significant wear occurred in 2 out of 10 samples.
- Table 3 shows the test results of two samples in which the wear depth on the side of the aluminum shaft was large in the example and the test results of two samples which showed remarkable wear in the comparative example.
- FIG. 30 is a plan view of a seal ring 1G according to a seventh embodiment of the present invention
- FIG. 31 is a partially cutaway perspective view showing a state where the seal ring 1G according to the present embodiment is mounted.
- 32 is a cross-sectional view of the seal ring 1G shown in FIG. 30, and is a cross-sectional view of the seal ring shown in FIG. 30, and
- FIG. 33 is a cross-sectional view of the seal ring shown in FIG.
- the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof is omitted.
- the first seal portion 4 is configured by one (one) line contact portion 41 that linearly contacts the side wall surface 72 of the annular groove 71.
- two (two) line contact portions are used. That is, in the seal ring 1G according to the present embodiment, the first seal portion 4 extends from the side surface of the non-sealing target fluid side A of the seal ring having a substantially rectangular cross section to the side wall surface 72 of the annular groove 71. It is constituted by two line contact portions (a first line contact portion 141 and a second line contact portion 142) that protrude and come into linear contact with the side wall 72.
- the first line contact portion 141 is formed from a convex portion 21 on one side of the separating portion 2 (in the vicinity of the distal end surface 21a or the distal end surface 21a) to a concave portion 24 on the other side (the opposite surface). 24a or the vicinity of the facing surface 24a).
- the second line contact portion 14 2 is provided on the inner diameter side of the convex portion 21 and forms an end portion 29 a defining the gap 29 on the inner peripheral side of the separation portion 2 or in the vicinity thereof (the separation portion 2 From one side) to the end 29 b of the inner diameter side of the concave portion 24, which constitutes the gap 29, or its vicinity (the other side of the separation portion 2), it is provided continuously over the entire circumference.
- the annular groove 7 1 is located at a position of length 1 from the non-sealing target fluid side A of the second seal portion 3 to the inner diameter side. It is constituted by a mountain-shaped portion (projecting portion) projecting toward the side wall surface 72 of the light emitting element.
- the second line contact portion 14 2 from the first line contact portion 14 1, at the position of the length a on the inner diameter side in the same manner as the first line contact portion 14 1 It is composed of a mountain-shaped portion (projection) projecting toward the side wall surface 72. Further, in the present embodiment, the second line contact portion 142 is located on the non-sealing target fluid side A of the separation surface 25 of the concave portion 24 in the concave portion 24, and It is provided to protrude from the fluid side A side to be sealed.
- the first line contact portion 14 1 and the second line contact portion 14 2 In other words, it is configured without providing the transition portion 41 d (the portion that transitions from the line contact portion located on the outer peripheral side to the line contact portion located on the inner peripheral side) described in the above-described embodiment. .
- the length of the portion of these line contact portions that cross in the radial direction (the annular groove 7 (The length of the part in contact with the side wall surface 7 in the radial direction of the part in contact with the side wall 7) can be shortened. It is possible to lower the probability of entry of foreign matter. Therefore, the contact state can be further stabilized. It is more effective to provide the first line contact portion 141 and the second line contact portion 142 substantially concentrically with respect to the shaft 70.
- a leak path R (see Fig. 31) is formed with the line contact part 1 42.
- the cross section S determined by the dimensions a, b and c is the non-sealing of the first line contact portion 141 and the second line contact portion 142 and the convex portion 21.
- This is a radial cross section of a space formed by the target fluid side A end face 48 and the side wall face 72 of the annular groove 71, i.e., 9 is a cross section of a leak path R formed by providing a first line contact portion 141 and a second line contact portion 142 in a separated portion 2 in a radial direction. Therefore, the leak amount can be controlled by appropriately adjusting the area of the cross section S.
- the dimension (1 + a) be small in order to reduce the drag torque generated by the relative rotation between the shaft and the seal ring.
- the dimension 1 is too small, the first line contact portion 141 does not come into contact with the side wall surface 72 of the annular groove 71 and the gap between the shaft hole of the housing 80 and the shaft 70 does not come into contact.
- the annular gap There is a possibility that it will be located in the annular gap, that is, there will be a gap in the line contact portion between the side surface of the seal ring and the side wall surface 72 of the annular groove 71, and the amount of leakage may increase.
- reducing the dimension a reduces the dimension b. Therefore, if the dimension a is too small, there is a possibility that foreign matter cannot pass through.
- the dimension 1 may be set to the same dimension as in the above-described embodiment.
- the L portion shown in FIG. 33 indicates the first line contact portion 141, and the cross-sectional shape of this portion is the same as the cross-sectional shape shown in FIG. Also, the cross-sectional shape of the second line contact portion 142 is the same.
- the first line contact section 141 and the second line contact section 142 may be provided up to the ends in the circumferential direction, respectively. It doesn't have to be provided.
- the first line contact portion 141 and the second line contact portion 142 are provided so as to overlap each other when projected in the radial direction, but this is not a limitation.
- each line contact part is Since the leak path is formed by being provided on the outer diameter side, the amount of leak can be controlled by adjusting the cross section S assuming that the cross section S is formed.
- the first line contact portions 14 1 and 2 on one side of the separation portion 2 Either one of the ends of the line contact portions 14 2 and the end of the first line contact portion 14 1 and the end of the second line contact portion 14 2 on the other side of the separation portion 2.
- the cross-sectional area formed by one of the ends, the side surface of the ring main body (the end surface of the convex portion 21 on the non-sealed fluid side A end surface 48), and the side wall surface 72 of the annular groove 71 is minimized. In this part, the amount of leak is determined.
- the fourth and sixth embodiments are shown as modified examples of the seal ring 1 according to the second embodiment. (As modified examples of the seal ring according to the first embodiment, The fourth and sixth embodiments) are also preferable in the seal ring 1G according to the present embodiment in the same manner as described in the fourth and sixth embodiments. This is because, in the seal rings 1D, 1F according to the fourth and sixth embodiments, the first seal portion 4 is replaced with the wire contact portion 41, and the above-described first wire contact portion 14 1 And the second line contact portion 142 can be stated in other words.
- the sealing ring 1G a convex portion in which the outer peripheral portion protrudes in the circumferential direction with respect to the inner peripheral portion of the separating portion 2 like the sealing rings 1C and 1D, Outer circumference against inner circumference
- the separating portion may have directionality with respect to the seal ring 1G.
- the projection 21 and the projection 23 have a separation surface perpendicular to the axis, of the fitting surfaces where the projection and the recess are fitted.
- the projection 21 and the projection 23 have a separation surface perpendicular to the axis, of the fitting surfaces where the projection and the recess are fitted.
- a configuration may be adopted in which foreign matter is easily discharged.
- each part of the seal ring 1G that is, the seal ring outer diameter, the seal ring thickness, the seal ring height, etc., were set in the same manner as the seal ring 1F (1B) used in Example 3. .
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Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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AU2003248120A AU2003248120A1 (en) | 2002-07-26 | 2003-07-25 | Seal ring |
EP03771348A EP1541908B1 (en) | 2002-07-26 | 2003-07-25 | Seal ring |
DE60313630T DE60313630T2 (de) | 2002-07-26 | 2003-07-25 | Dichtungsring |
US10/522,385 US7341256B2 (en) | 2002-07-26 | 2003-07-25 | Seal ring |
JP2005505574A JP4079170B2 (ja) | 2002-07-26 | 2003-07-25 | シールリング |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002218213 | 2002-07-26 | ||
JP2002-218213 | 2002-07-26 | ||
JP2002324188 | 2002-11-07 | ||
JP2002-324188 | 2002-11-07 |
Publications (1)
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WO2004011827A1 true WO2004011827A1 (ja) | 2004-02-05 |
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PCT/JP2003/009469 WO2004011827A1 (ja) | 2002-07-26 | 2003-07-25 | シールリング |
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US (1) | US7341256B2 (ja) |
EP (1) | EP1541908B1 (ja) |
JP (1) | JP4079170B2 (ja) |
KR (1) | KR100639787B1 (ja) |
AU (1) | AU2003248120A1 (ja) |
DE (1) | DE60313630T2 (ja) |
WO (1) | WO2004011827A1 (ja) |
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JP2006112548A (ja) * | 2004-10-15 | 2006-04-27 | Nok Corp | シールリング |
WO2007105589A1 (ja) * | 2006-03-10 | 2007-09-20 | Ntn Corporation | シールリング |
WO2008013281A1 (fr) * | 2006-07-27 | 2008-01-31 | Nok Corporation | Bague d'étanchéité |
JP2010540862A (ja) * | 2007-10-06 | 2010-12-24 | 秀明 宇 | 密封オイルリング |
JP2013155846A (ja) * | 2012-01-31 | 2013-08-15 | Ntn Corp | シールリング |
CN110285112A (zh) * | 2019-07-25 | 2019-09-27 | 重庆气体压缩机厂有限责任公司 | 用于往复压缩机的高压活塞密封结构 |
JP2022116356A (ja) * | 2019-12-11 | 2022-08-09 | Ntn株式会社 | シールリングおよび油圧機器 |
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- 2003-07-25 WO PCT/JP2003/009469 patent/WO2004011827A1/ja active IP Right Grant
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Cited By (12)
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JP2006112548A (ja) * | 2004-10-15 | 2006-04-27 | Nok Corp | シールリング |
JP4736394B2 (ja) * | 2004-10-15 | 2011-07-27 | Nok株式会社 | シールリング |
WO2007105589A1 (ja) * | 2006-03-10 | 2007-09-20 | Ntn Corporation | シールリング |
JP2007239954A (ja) * | 2006-03-10 | 2007-09-20 | Ntn Corp | シールリング |
US8454024B2 (en) | 2006-03-10 | 2013-06-04 | Ntn Corporation | Seal ring |
KR101418386B1 (ko) * | 2006-03-10 | 2014-07-10 | 엔티엔 가부시키가이샤 | 밀봉 링 |
WO2008013281A1 (fr) * | 2006-07-27 | 2008-01-31 | Nok Corporation | Bague d'étanchéité |
JP2010540862A (ja) * | 2007-10-06 | 2010-12-24 | 秀明 宇 | 密封オイルリング |
JP2013155846A (ja) * | 2012-01-31 | 2013-08-15 | Ntn Corp | シールリング |
CN110285112A (zh) * | 2019-07-25 | 2019-09-27 | 重庆气体压缩机厂有限责任公司 | 用于往复压缩机的高压活塞密封结构 |
JP2022116356A (ja) * | 2019-12-11 | 2022-08-09 | Ntn株式会社 | シールリングおよび油圧機器 |
JP7153161B2 (ja) | 2019-12-11 | 2022-10-13 | Ntn株式会社 | シールリングおよび油圧機器 |
Also Published As
Publication number | Publication date |
---|---|
EP1541908A1 (en) | 2005-06-15 |
EP1541908B1 (en) | 2007-05-02 |
KR100639787B1 (ko) | 2006-11-01 |
DE60313630D1 (de) | 2007-06-14 |
JPWO2004011827A1 (ja) | 2005-11-24 |
US20060038355A1 (en) | 2006-02-23 |
EP1541908A4 (en) | 2005-10-12 |
AU2003248120A1 (en) | 2004-02-16 |
KR20050025675A (ko) | 2005-03-14 |
DE60313630T2 (de) | 2008-01-03 |
US7341256B2 (en) | 2008-03-11 |
JP4079170B2 (ja) | 2008-04-23 |
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