JP7431083B2 - Seal ring and seal structure - Google Patents

Description

The present disclosure relates to a seal ring that is attached to one of male and female fitting members that fit into each other and comes into close contact with the other fitting member, and seals a gap between the circumferential surfaces of both fitting members; The present invention relates to a seal structure having such a seal ring.

Conventionally, the O-ring, which has been widely used as this type of seal ring, is accommodated in an O-ring groove formed on the circumferential surface of one fitting member, and forms an annular protrusion protruding from the circumferential surface. do. Then, it is crushed between the circumferential surfaces of both fitting members to seal the gap (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2000-81177 (Figure 1)

However, with conventional seal rings such as the O-rings mentioned above, there is a problem in that large fitting resistance is applied to the fitting operation when pushing the seal ring between both fitting members. There is a need to develop technology to do so.

A first aspect of the invention made to solve the above problem is that the male and female fitting members that fit into each other are attached to one of the fitting members and are brought into close contact with the other fitting member, and both of the fitting members are fitted together. A seal ring that seals a gap between circumferential surfaces of members, the cylinder having a cylindrical shape, and one of its inner and outer circumferential surfaces being a cylindrical mounting surface that closely contacts the circumferential surface of the one fitting member. a shaped base; and an annular top that protrudes from the cylindrical base to the opposite side of the cylindrical mounting surface, the tip of which forms a ring shape closed around the cylindrical base and tightly contacts the circumferential surface of the other fitting member. The seal ring is provided with an annular protrusion having a shape of a cylindrical shape, and at least a portion of the annular top portion extends in a direction intersecting a circumferential direction of the cylindrical base.

A second aspect of the invention is the seal ring according to the first aspect , wherein the annular protrusion has a ridge structure extending with a uniform width.

A third aspect of the invention is the seal ring according to the first aspect or the second aspect, which includes a plurality of the annular protrusions.

A fourth aspect of the invention is the seal ring according to the third aspect , including an intersection where the annular protrusions intersect.

A fifth aspect of the invention is the annular projection according to any one of the first to fourth aspects, wherein the annular protrusion is entirely parallel to an imaginary plane that is inclined with respect to the central axis of the cylindrical base. It is a seal ring as described in the aspect .

A sixth aspect of the invention is the seal ring according to any one of the first to fifth aspects , wherein the annular protrusion meanders in a circumferential direction of the cylindrical base.

A seventh aspect of the invention is the seal ring according to any one of the first to sixth aspects , wherein the annular protrusion extends with a semicircular or triangular cross section .

An eighth aspect of the invention is the seal according to any one of the first to sixth aspects , wherein the annular protrusion has a pleat shape with a tip facing toward one side in the axial direction of the cylindrical base. It's a ring.

A ninth aspect of the invention is that a circumferential surface of the cylindrical base opposite to the cylindrical mounting surface has a first tapered surface that decreases in diameter from the annular top portion toward one end of the cylindrical base; The seal ring according to the first aspect, further comprising a second tapered surface whose diameter decreases from the annular top portion toward the other end of the cylindrical base.

A tenth aspect of the invention is the seal ring according to any one of the first to ninth aspects , wherein both end surfaces of the cylindrical base are orthogonal to the cylindrical mounting surface.

An eleventh aspect of the invention is characterized in that male and female fitting members that fit into each other, an annular groove formed on the circumferential surface of one of the male and female side fitting members, and an annular groove installed in the annular groove are provided. and the seal ring according to any one of the first to tenth aspects , which seals the gap between the circumferential surfaces of the male and female side fitting members.

The seal rings of the first and eleventh aspects of the invention have a structure in which an annular protrusion protrudes from one of the inner and outer peripheral surfaces of the cylindrical base. The seal ring is mounted with the cylindrical mounting surface of the cylindrical base in close contact with the circumferential surface of one of the male and female fitting members. In this state, when one fitting member is fitted to the other fitting member, the annular protrusion protruding from the cylindrical base comes into close contact with the circumferential surface of the other fitting member, causing both fitting members to fit together. Gaps between circumferential surfaces are sealed. Here, the annular top portion, which is the tip of the annular protrusion, forms a closed ring around the cylindrical base, and at least partially extends in a direction intersecting the circumferential direction of the cylindrical base. This prevents the entire annular protrusion from being pushed between the two mating members at once during the mating process of the two mating members, and it is gradually pushed in to disperse the mating resistance, reducing the mating resistance. It can be made smaller than before.

The annular protrusion may have a protrusion structure extending with a uniform width ( second aspect of the invention ), or the annular protrusion may be formed by protruding the entire opposite side of the cylindrical mounting surface of the cylindrical base to have a mountain-shaped cross section. It may also be a section ( ninth aspect of the invention ).

The number of annular protrusions may be one or more ( third aspect of the invention ), and in the case of plural annular protrusions, the annular protrusions may have intersecting portions ( third aspect of the invention) . (4th aspect ), the plurality of annular protrusions may be compactly gathered in the axial direction of the cylindrical base. Note that the annular protrusions may intersect with each other, or may intersect without intersecting each other.

Further, the annular protrusion may have a wave shape meandering in the circumferential direction of the cylindrical base ( sixth aspect of the invention ), or may have a simple structure in which the entire annular protrusion is inclined with respect to the central axis of the cylindrical base. ( fifth aspect of the invention ). Moreover, the above-described simple structure can reduce the mold cost for manufacturing the seal ring.

The cross section of the annular protrusion may be semicircular or triangular ( seventh aspect of the invention ), or may have another shape. Further, if the annular protrusion has a pleat shape with the tip facing one side in the axial direction of the cylindrical base, as in the seal ring of the eighth aspect of the invention , the annular protrusion can be pushed from the opposite side of the one side. Since the annular protrusion easily falls down when the fitting member is fitted, the fitting operation can be easily performed by arranging the annular protrusion so as to easily fall down during the fitting process of the fitting member.

Furthermore, in the seal ring according to the tenth aspect of the invention , since both end surfaces of the cylindrical base are orthogonal to the cylindrical mounting surface, a simple stepped portion is provided on the circumferential surface of the fitting member to which the seal ring is mounted. The seal ring can then be positioned relative to the mating member.

A perspective view of a seal ring according to a first embodiment of the present disclosure Side sectional view of seal structure A perspective view of a seal ring according to a second embodiment Side sectional view of seal structure A perspective view of a seal ring according to a third embodiment Side sectional view of seal ring A perspective view of a seal ring according to a fourth embodiment Side sectional view of seal ring A perspective view of a seal ring according to a fifth embodiment Side sectional view of seal ring (A) Perspective view of the seal ring of the sixth embodiment, (B) Side view thereof (A) Perspective view of the seal ring of the seventh embodiment, (B) Side view thereof (A) Perspective view of the seal ring of the eighth embodiment, (B) Perspective view of the seal ring of the ninth embodiment (A) Perspective view of the seal ring of the tenth embodiment, (B) Perspective view of the seal ring of the eleventh embodiment (A) Side sectional view of the seal ring of the 12th embodiment, (B) Side sectional view of the seal ring of the 13th embodiment, (C) Side sectional view of the seal ring of the 14th embodiment (A) Side sectional view of the seal ring of the fifteenth embodiment, (B) Side sectional view of its attached state A cross-sectional view of an annular protrusion according to a modified example of the present disclosure

[First embodiment]
Hereinafter, a seal ring 10A according to a first embodiment of the present disclosure will be described with reference to FIGS. 1 and 2. The seal ring 10A is, for example, a molded product of elastomer such as vulcanized rubber or soft resin, and includes an annular protrusion 21 on the outer peripheral surface 11B of the cylindrical base 11.

The cylindrical base 11 has, for example, a flat cylindrical shape with a diameter larger than the axial length. Further, both end surfaces 11C of the cylindrical base 11 form flat surfaces perpendicular to the central axis of the cylindrical base 11, and the inner circumferential surface 11A and the outer circumferential surface 11B of the cylindrical base 11 are orthogonal to each other. The corners are rounded. In the first embodiment, the circumferential surface 11A of the cylindrical base 11 corresponds to the "cylindrical mounting surface" in the claims.

The annular protrusion 21 has a protruding structure extending with a uniform width, and its cross-sectional shape is, for example, semicircular, as shown in FIG. 2(A). As shown in FIG. 1, the annular protrusion 21 has a closed annular shape around the cylindrical base 11, and the entire annular projection 21 is formed on an imaginary plane S (FIG. 2) that is inclined with respect to the central axis of the cylindrical base 11. A) is parallel to (see). As a result, the annular protrusion 21 is closest to both end surfaces 11C of the cylindrical base 11 at two locations in the circumferential direction. Further, even at the closest position, the annular protrusion 21 is slightly shifted toward the center of the cylindrical base 11 in the axial direction from the end surface 11C. Note that the inner corner where the outer surface of the annular protrusion 21 intersects with the outer circumferential surface 11B of the cylindrical base 11 is rounded.

FIG. 2 shows a seal structure in which the seal ring 10A seals between the circumferential surfaces of male and female fitting members 91 and 95 that fit into each other. One fitting member 95 on the female side has a cylindrical shape, for example, and the other fitting member 91 on the male side is exactly fitted inside it. Further, the fitting member 91 has an annular groove 92 formed by recessing the middle portion in the axial direction in a stepped manner. Further, the outer diameter of the small diameter portion 91B of the fitting member 91 where the annular groove 92 is formed is slightly larger than the inner diameter of the cylindrical base 11 of the seal ring 10A. Furthermore, the difference in radius between the large diameter portion 91A and the small diameter portion 91B on both sides of the small diameter portion 91B of the fitting member 91 (that is, the depth of the annular groove 92) is determined by the thickness of the cylindrical base 11 of the seal ring 10A. It is larger than the thickness.

Note that the corner between the inner circumferential surface 95A and the end surface 95C of the fitting member 95 is chamfered to form a tapered chamfered surface 95T. The corner between the peripheral surface and the peripheral surface is also chamfered to form a tapered chamfered surface 91T.

As shown in FIG. 2(A), the seal ring 10A is attached to the other fitting member 91 so that the entire cylindrical base 11 fits within the annular groove 92, and the annular top portion which is the tip of the annular protrusion 21 21A is projected outward from the circumferential surface of the large diameter portion 91A of the fitting member 91. Further, in this state, the seal ring 10A is elastically deformed by the fitting member 91 (specifically, the small diameter portion 91B) so as to slightly expand in diameter, and tightly contacts the circumferential surface of the annular groove 92 in the fitting member 91. ing. Then, when one fitting member 95 is fitted to the other fitting member 91, as shown in FIG. It comes into close contact with the surface 95A, and the gap between the circumferential surfaces of both fitting members 91 and 95 is sealed.

The description regarding the configuration of the seal ring 10A and the seal structure of the first embodiment is above. Next, the effects of the first embodiment will be explained. The seal ring 10A of the first embodiment deforms as follows during the fitting process of the fitting members 91 and 95. That is, before the fitting members 91 and 95 are fitted, as shown in FIG. , and the annular top portion 21A of the annular projection 21 protrudes from the outer circumferential surface 11B of the other fitting member 91. The entire annular top portion 21A is inclined with respect to the fitting direction of the fitting members 91 and 95. As a result, when one fitting member 95 is fitted to the other fitting member 91, the annular top portion 21A comes into contact with one point in the circumferential direction on the end surface 95C of the fitting member 95. When the fitting between the fitting members 91 and 95 is deepened (increasing the overlap between the two), a portion of the annular protrusion 21 in the circumferential direction including the annular top portion 21A is moved between the fitting members 91 and 95. Pushed in. Then, as the fitting between the fitting members 91 and 95 deepens further, the annular top portion 21A comes into contact with two points in the circumferential direction on the end surface 95C of the fitting member 95, and finally, the fitting member 95 After the annular top portion 21A comes into contact with one point in the circumferential direction on the end surface 95C, the entire annular protrusion 21 including the annular top portion 21A fits between the fitting members 91 and 95.

As described above, according to the configuration of the first embodiment, the entire annular protrusion 21 is pushed between the fitting members 91 and 95 at once in the process of fitting the fitting members 91 and 95. Since the fitting is gradually pushed in without any friction, the fitting resistance is dispersed, and the fitting resistance can be made smaller than before. Moreover, since this effect is obtained by the special structure of the seal ring 10A, no special processing is required for the fitting members 91 and 95. Further, the seal ring 10A is supported by the other fitting member 91 by fitting the cylindrical base 11, which has a longer axis length than the O-ring, into the other fitting member 91. , 95, problems such as being pushed by one of the fitting members 95 and being turned over, or being shifted relative to the other fitting member 91 can be suppressed. Moreover, since the annular protrusion 21 of the seal ring 10A of the first embodiment has a simple elliptical shape, it is possible to suppress the manufacturing cost of a mold for manufacturing the seal ring 10A.

In the first embodiment, the inner circumferential surface 11A of the seal ring 10A is fitted into the fitting member 91 (specifically, the small diameter portion 91B) in a state in which the inner circumferential surface 11A of the seal ring 10A is slightly expanded in diameter. Although the seal ring 10A was in close contact with the circumferential surface, the seal ring 10A was fitted into the fitting member 91 in an undeformed state, and the seal ring 10A was sandwiched between the fitting members 91 and 95, causing the seal ring 10A to may be in close contact with the circumferential surface of the fitting member 91.

[Second embodiment]
The seal ring 10B of the second embodiment shown in FIGS. 3 and 4 is different from the seal ring 10A of the first embodiment described above in that the annular protrusion 22 protrudes from the inner peripheral surface 11A of the cylindrical base 11. The difference is that the outer circumferential surface 11B of the cylindrical base 11 is a "cylindrical mounting surface" as claimed in the claims. Further, FIG. 4 shows a seal structure in which this seal ring 10B is provided between male and female fitting members 93 and 96.

In this seal structure, an annular groove 97 is formed in an inner circumferential surface 96A of one cylindrical fitting member 96 on the female side, and a seal ring 10B is fitted into the annular groove 97. Further, the annular top portion 22A of the annular projection 22 projects inward from the inner circumferential surface 96A of the fitting member 96. Then, in the fitting process when the other male fitting member 93 shown in FIG. 4(B) is fitted inside the one fitting member 96, the annular shape is The protrusion 22 is gradually pushed between the fitting members 93 and 96, and the fitting resistance is dispersed, making it possible to suppress the fitting resistance more than ever.

[Third embodiment]
A seal ring 10C of the third embodiment is shown in FIGS. 5 and 6, and the cross-sectional shape of the annular protrusion 23 is different from that of the seal ring 10A of the first embodiment described above. Specifically, the cross-sectional shape of the annular protrusion 23 of the seal ring 10C of the third embodiment is triangular, and the annular top portion 23A is pointed.

[Fourth embodiment]
A seal ring 10D of the fourth embodiment is shown in FIGS. 7 and 8, and the cross-sectional shape of the annular protrusion 24 is different from that of the seal ring 10A of the first embodiment described above. Specifically, as shown in FIG. 8, the annular protrusion 24 of the seal ring 10D of the fourth embodiment has a fold shape with its tip facing one side in the axial direction of the cylindrical base 11, and has a cylindrical shape. If the base 11 is pushed from the other side in the axial direction, it will more easily fall toward the cylindrical base 11 than if it is pushed from one side. As a result, when the seal ring 10D of the fourth embodiment is attached to a fitting member (not shown) and pushed by the mating member, the annular protrusion 24 is arranged so as to easily fall down. The mating resistance is dispersed, and the mating resistance can be suppressed compared to the conventional method.

[Fifth embodiment]
A seal ring 10E of the fifth embodiment is shown in FIGS. 9 and 10, in which an annular protrusion 25 having a chevron-shaped cross section is formed on the entire outer circumferential surface 11B of the cylindrical base 11. Specifically, the annular top portion 25A of the annular projection 25 has a ridgeline 25S, and the ridgeline 25S is parallel to an imaginary plane that is inclined with respect to the central axis of the cylindrical base 11. The outer circumferential surface 11B of the cylindrical base 11 has a first tapered surface 11X that decreases in diameter from the ridge line 25S toward one end of the cylindrical base 11, and a first tapered surface 11X that decreases in diameter from the ridge line 25S toward the other end of the cylindrical base 11. The entire outer circumferential surface 11B of the cylindrical base 11 forms an annular protrusion 25 with a mountain-shaped cross section, which is intertwined with the second tapered surface 11Y. According to the structure of the seal ring 10E of the fifth embodiment, the slope of the annular protrusion 25 toward the annular top portion 25A becomes gentle, making it easier to be pushed between the circumferential surfaces of the fitting member, reducing fitting resistance. Become.

[Sixth embodiment]
The seal ring 10F of the sixth embodiment is shown in FIG. 11, and is different from the seal ring 10A of the first embodiment described above in that the annular protrusion 26 faces the cylindrical base 11 in the circumferential direction. different. Specifically, the annular protrusion 26 is smoothly curved in a sinusoidal shape, and has a shape including, for example, two periods of waves around the entire circumference of the cylindrical base 11. In addition, in each explanatory diagram (FIG. 11 to FIG. 14, FIG. 17) of the sixth embodiment, the following seventh to eleventh embodiments, and modified examples, "A" is added to the end of the reference numerals of the annular protrusions 26 to 37. The respective annular top portions 26A to 37A of the annular protrusions 26 to 37 are shown as numerals 26A to 37A with "" attached thereto.

[Seventh embodiment]
A seal ring 10G of the seventh embodiment is shown in FIG. 12, and differs from the seal ring 10F of the sixth embodiment described above in that an annular protrusion 27 meanders in a triangular wave shape. Specifically, the upper peaks and lower peaks of the triangular wave are alternately arranged at positions dividing the cylindrical base 11 into a plurality of equal parts in the circumferential direction in FIG. 12(A), and the adjacent upper peaks The annular protrusion 27 extends so as to connect the lower peak with the shortest distance.

[Eighth embodiment]
The seal ring 10H of the eighth embodiment is shown in FIG. 13(A), and has a pair of annular protrusions 28 in parallel with each other having the same shape as the annular protrusions 21 of the seal ring 10A of the first embodiment described above. It is located and prepared.

[Ninth embodiment]
The seal ring 10I of the ninth embodiment is shown in FIG. The portions 29 are arranged non-parallel to each other. Further, the pair of annular protrusions 29 are closest to one end surface 11C of the cylindrical base 11 at the same first position in the circumferential direction of the cylindrical base 11, and are 180 degrees away from the end face 11C of the cylindrical base 11. They are arranged closest to the other end surface 11C of the cylindrical base 11 at the same second position in the circumferential direction.

[Tenth embodiment]
The seal ring 10J of the tenth embodiment is shown in FIG. The portions 30 intersect at one point in the circumferential direction of the cylindrical base 11. Specifically, the pair of annular protrusions 30 are arranged symmetrically across an imaginary dividing plane that divides the cylindrical base 11 into two in the axial direction, and one of the annular protrusions 30 The entire outer circumferential surface 11B is inclined with respect to the axial direction of the cylindrical base 11 in a state in which almost the entire part is located on one end side of the cylindrical base 11 from the dividing surface, and the other annular protrusion 30 is The entire outer peripheral surface 11B of the cylindrical base 11 is inclined with respect to the axial direction of the cylindrical base 11 in a state where substantially the entire portion of the outer circumferential surface 11B of the cylindrical base 11 is located on the other end side of the cylindrical base 11 from the dividing surface. A pair of annular protrusions 30 intersect at one point on the dividing plane.

[Eleventh embodiment]
The seal ring 10K of the eleventh embodiment is shown in FIG. The portions 31 intersect at two locations in the circumferential direction of the cylindrical base 11. Specifically, one of the pair of annular protrusions 31 is entirely inclined with respect to the axial direction of the cylindrical base 11, similar to the annular protrusion 21 of the seal ring 10A of the first embodiment described above. , the other annular protrusion 31 has a shape and arrangement that match when the one annular protrusion 31 is rotated 180 degrees around the central axis of the cylindrical base 11.

[Twelfth embodiment]
A seal ring 10L of the twelfth embodiment is shown in FIG. 15(A), and in the seal ring 10A of the first embodiment described above, the inner circumferential surface 11A of the cylindrical base 11, which is the cylindrical mounting surface, is An abutment protrusion 41 is formed at a position on the back side of the annular protrusion 21 . The contact protrusion 41 has a protrusion shape having a semicircular cross section, for example, and the radius of the semicircle is smaller than the radius of the semicircle of the annular protrusion 21 in cross section. Then, the abutting protrusion 41 is tightly pressed against the circumferential surface of the fitting member to which the seal ring 10L is mounted, and the inner circumferential surface 11A of the cylindrical base 11 is also closely attached to the fitting member.

[13th embodiment]
The seal ring 10M of the thirteenth embodiment is shown in FIG. 15(B), and like the seal ring 10L of the twelfth embodiment described above, the inner peripheral surface of the cylindrical base 11, which is the cylindrical mounting surface. An abutment protrusion 42 is provided at a position on the back side of the annular protrusion 21 in the abutment 11A. The cross-sectional shape of the abutting protrusion 42 is an arcuate surface that forms part of a circle including a semicircle that is the cross-sectional shape of the annular protrusion 21 .

[Fourteenth embodiment]
The seal ring 10N of the fourteenth embodiment is shown in FIG. 15(C), in which a pair of contact protrusions 41 extend from positions near both ends of the inner peripheral surface 11A of the cylindrical base 11, which is the cylindrical mounting surface. It has an overhanging structure.
[15th embodiment]
A seal ring 10P of the fifteenth embodiment is shown in FIG. 16, and has a structure in which an annular lip 43 protrudes from both end surfaces 11C of the cylindrical base 11 of the seal ring 10A of the first embodiment described above. Further, the seal ring 10P is used, for example, as shown in FIG. be done.

[Other embodiments]
(1) The cross-sectional shape of the annular protrusion according to the present disclosure is not limited to those exemplified in the first to fifteenth embodiments described above, and may be circular, oval, quadrilateral, trapezoidal, polygonal, arcuate, Alternatively, they may be partially cut out. Specifically, the cross-sectional shape may be similar to the annular protrusions 32 to 37 of the seal rings 10Q to 10V partially illustrated in FIG. 17.

(2) The “annular top portion” in the present disclosure means the “tip portion of the annular protrusion”. When the annular protrusion is formed on the outer circumferential surface of the cylindrical base, the "tip end of the annular protrusion" refers to the part furthest from the inner circumferential surface of the cylindrical base; When the part is formed on the inner circumferential surface of the cylindrical base, it refers to the part furthest from the outer circumferential surface of the cylindrical base. In other words, "the annular top portion which is the tip of the annular protrusion" is located at the farthest position of the seal ring from the circumferential surface of the fitting member to which the seal ring is attached, and A part that comes into close contact with the circumferential surface of a certain fitting member. Furthermore, the "annular top" may have such a shape as long as it is the "tip of the annular protrusion", for example, the annular top 32A of the annular protrusion 32 shown in FIG. 17(A). The cross-sectional shape of the annular top portion 32A may be round, as shown in FIG. The annular top portions 33A, 35A, and 37A may have flat cross-sectional shapes as shown in FIGS. 33A, 35A, and 37A, or the annular projections 34 and 36 shown in FIGS. The annular top portions 34A, 36A may have uneven cross-sectional shapes, such as the annular top portions 34A, 36A.

(3) In the seal rings 10C to 10N and 10P to 10V of the third to fifteenth embodiments and modifications described above, the annular protrusion was provided on the outer circumferential surface 11B of the cylindrical base 11, but in the first embodiment Similar to the relationship between the seal ring 10A of the second embodiment and the seal ring 10B of the second embodiment, in the seal rings 10C to 10N and 10P to 10V of the third to fifteenth embodiments, the annular protrusion is located inside the cylindrical base. It may be placed on the circumferential surface of the

(4) Furthermore, some or all of the structures of the seal rings 10C to 10N and 10P to 10V of the first to fifteenth embodiments and modified examples described above may be combined as desired.

(5) Although the annular protrusions 26 and 27 illustrated in the sixth and seventh embodiments have a sinusoidal wave shape or a triangular wave shape, they may have a rectangular wave shape or a trapezoidal wave shape.

(6) Although the cylindrical base 11 of the seal rings 10C to 10N and 10P to 10V of the above-mentioned first to fifteenth embodiments and modified examples has a diameter larger than the axial length, the reverse is also possible. The length may be the same.

(7) Although the cylindrical base 11 of the seal rings 10C to 10N and 10P to 10V in the first to fifteenth embodiments and modifications described above is cylindrical, it may be elliptical or square.

(8) Both end surfaces 11C of the cylindrical base 11 of the seal rings 10A to 10N, 10P to 10V of the first to fifteenth embodiments and modified examples described above are flat surfaces, but they may not be flat surfaces. For example, it may be a tapered surface or a circular arc surface.

10A to 10N, 10P to 10V Seal ring 11 Cylindrical base 11A Inner circumferential surface 11B Outer circumferential surface 11C End surface 11X First tapered surface 11Y Second tapered surface 21 to 37 Annular protrusion 21A to 37A Annular top portion 91, 93 ,95,96 Fitting member 92,97 Annular groove

Claims (6)

A seal ring that is attached to one of the male and female fitting members that fit together and comes into close contact with the other fitting member to seal the gap between the circumferential surfaces of the two fitting members,
a cylindrical base having a cylindrical shape, and one of its inner and outer circumferential surfaces serving as a cylindrical mounting surface that closely contacts the circumferential surface of the one fitting member;
The cylindrical base protrudes from the opposite side of the cylindrical mounting surface, and the distal end thereof forms an annular top portion that is closed around the cylindrical base and tightly contacts the circumferential surface of the other fitting member. an annular protrusion that is entirely parallel to an imaginary plane that is inclined with respect to the central axis of the cylindrical base;
Two of the annular protrusions are provided so as to be parallel to each of the two intersecting imaginary planes,
A seal ring including an intersection where the annular protrusions intersect. A seal ring that is attached to one of the male and female fitting members that fit together and comes into close contact with the other fitting member to seal the gap between the circumferential surfaces of the two fitting members,
a cylindrical base having a cylindrical shape, and one of its inner and outer circumferential surfaces serving as a cylindrical mounting surface that closely contacts the circumferential surface of the one fitting member;
The annular top portion protrudes from the cylindrical base to the opposite side of the cylindrical mounting surface, and the tip portion forms an annular shape closed around the cylindrical base and tightly contacts the circumferential surface of the other fitting member. comprising a plurality of annular protrusions;
At least a portion of the annular top portion extends in a direction intersecting the circumferential direction of the cylindrical base,
comprising an intersection where the annular protrusions intersect,
A circumferential surface of the cylindrical base opposite to the cylindrical mounting surface includes a first tapered surface that decreases in diameter from the annular top portion toward one end of the cylindrical base, and a first tapered surface that decreases in diameter from the annular top portion to the one end of the cylindrical base. a second tapered surface that decreases in diameter toward the other end of the base. A seal ring that is attached to one of the male and female fitting members that fit together and comes into close contact with the other fitting member to seal the gap between the circumferential surfaces of the two fitting members,
a cylindrical base having a cylindrical shape, and one of its inner and outer circumferential surfaces serving as a cylindrical mounting surface that closely contacts the circumferential surface of the one fitting member;
The annular top portion protrudes from the cylindrical base to the opposite side of the cylindrical mounting surface, and the tip portion forms an annular shape closed around the cylindrical base and tightly contacts the circumferential surface of the other fitting member. comprising an annular protrusion;
The annular top portion is entirely parallel to an imaginary plane that is inclined with respect to the central axis of the cylindrical base,
A circumferential surface of the cylindrical base opposite to the cylindrical mounting surface includes a first tapered surface that decreases in diameter from the annular top portion toward one end of the cylindrical base, and a first tapered surface that decreases in diameter from the annular top portion to the one end of the cylindrical base. a second tapered surface that decreases in diameter toward the other end of the base. A seal ring that is attached to one of the male and female fitting members that fit together and comes into close contact with the other fitting member to seal the gap between the circumferential surfaces of the two fitting members,
a cylindrical base having a cylindrical shape, and one of its inner and outer circumferential surfaces serving as a cylindrical mounting surface that closely contacts the circumferential surface of the one fitting member;
The annular top portion protrudes from the cylindrical base to the opposite side of the cylindrical mounting surface, and the tip portion forms an annular shape closed around the cylindrical base and tightly contacts the circumferential surface of the other fitting member. comprising an annular protrusion;
At least a portion of the annular top portion extends in a direction intersecting the circumferential direction of the cylindrical base,
A circumferential surface of the cylindrical base opposite to the cylindrical mounting surface includes a first tapered surface that decreases in diameter from the annular top portion toward one end of the cylindrical base, and a first tapered surface that decreases in diameter from the annular top portion to the one end of the cylindrical base. a second tapered surface that decreases in diameter toward the other end of the base;
Both end surfaces of the cylindrical base are perpendicular to the cylindrical mounting surface of the seal ring. male and female fitting members that fit into each other;
an annular groove formed on the circumferential surface of one of the male and female fitting members;
a seal ring installed in the annular groove and in close contact with the other fitting member to seal a gap between the circumferential surfaces of the male and female fitting members,
The seal ring is
a cylindrical base having a cylindrical shape, and one of its inner and outer circumferential surfaces serving as a cylindrical mounting surface that closely contacts the circumferential surface of the one fitting member;
The annular top portion protrudes from the cylindrical base to the opposite side of the cylindrical mounting surface, and the tip portion forms an annular shape closed around the cylindrical base and tightly contacts the circumferential surface of the other fitting member. comprising an annular protrusion;
At least a portion of the annular top portion extends in a direction intersecting the circumferential direction of the cylindrical base,
A circumferential surface of the cylindrical base opposite to the cylindrical mounting surface includes a first tapered surface that decreases in diameter from the annular top portion toward one end of the cylindrical base, and a first tapered surface that decreases in diameter from the annular top portion to the one end of the cylindrical base. and a second tapered surface that decreases in diameter toward the other end of the base. A seal ring that is attached to one of the male and female fitting members that fit together and comes into close contact with the other fitting member to seal the gap between the circumferential surfaces of the two fitting members,
a cylindrical base having a cylindrical shape, and one of its inner and outer circumferential surfaces serving as a cylindrical mounting surface that closely contacts the circumferential surface of the one fitting member;
The annular top portion protrudes from the cylindrical base to the opposite side of the cylindrical mounting surface, and the tip portion forms an annular shape closed around the cylindrical base and tightly contacts the circumferential surface of the other fitting member. comprising an annular protrusion;
At least a portion of the annular top portion extends in a direction intersecting the circumferential direction of the cylindrical base,
A seal ring having an annular lip protruding from both ends of the cylindrical base.

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