JP6752069B2 - Arrangement structure of sealing material - Google Patents

Description

The present invention relates to an arrangement structure of a sealing material.

Regarding the conventional arrangement structure of the sealing material, for example, in Japanese Patent Application Laid-Open No. 7-41969, even if the movable member moves or a fluid pressure such as pulsating pressure acts, the O-ring rolls and rolls. An O-ring is disclosed for the purpose of preventing deformation of the top of the O-ring (Patent Document 1). The O-ring disclosed in Patent Document 1 is mounted in an annular groove and has an annular O-ring body having a substantially circular cross-sectional shape and a protrusion protruding from both side surfaces of the O-ring body toward both side surfaces of the annular groove. Has a part.

Further, Japanese Patent Application Laid-Open No. 55-93758 discloses an O-ring holding structure for hydraulic equipment for the purpose of keeping the O-ring groove in place (Patent Document 2). In the O-ring holding structure of the hydraulic device disclosed in Patent Document 2, the width of the O-ring groove is slightly larger than the diameter of the O-ring, and the required portion of the O-ring is larger than the width of the O-ring groove. A slightly wider part is provided.

Further, in Japanese Patent Application Laid-Open No. 2008-298246, the seal ring does not protrude from the seal groove during or after assembly of the fluid equipment, and is not bitten into the seal surface, and further, the assembly work to the seal groove is performed. A flat seal ring is disclosed for the purpose of facilitating the above (Patent Document 3). In the flat seal ring disclosed in Patent Document 3, a flange-shaped overhang portion extending from the main body ring in the width direction of the seal groove on the side where the pressure of the fluid to be sealed is applied in the width direction of the mounting groove of the seal ring. Is provided. The overhanging portion is provided integrally with the main body portion in a part of a length range along the circumferential direction of the main body ring.

Jitsufuku No. 7-41969 Jikkai Sho 55-93758 Japanese Unexamined Patent Publication No. 2008-298246

As disclosed in the above-mentioned patent documents, various sealing materials accommodated in the annular groove have been proposed as means for sealing the fluid. In such a sealing material, the member to which the sealing material is mounted may slide minutely due to the pressure pulsation of the fluid to be sealed. In this case, there is a concern that the sealing material rolls in the groove, leading to damage to the sealing material and shortening of the service life.

Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a sealing material arrangement structure that more reliably prevents the sealing material from rolling.

The arrangement structure of the sealing material according to one aspect of the present invention has a first member having a first mating surface and a second mating surface facing the first mating surface, and is recessed from the second mating surface to be annular. It is provided with a second member in which a groove extending to the surface is formed, and a closed annular sealing material which is housed in the groove and seals between the first member and the second member. The second member further has a groove bottom surface that faces the first mating surface and forms the bottom wall of the groove portion, and a groove side surface that rises from the groove bottom surface toward the second mating surface and forms a side wall of the groove portion. The groove side surface is composed of an inner peripheral side groove side surface arranged on the inner peripheral side of the groove portion and an outer peripheral side groove side surface arranged on the outer peripheral side of the groove portion. The sealing material includes a base portion that comes into contact with the first mating surface and the bottom surface of the groove, a first protruding portion that protrudes from the base portion toward the inner peripheral side groove side surface, and a second protruding portion that protrudes from the base portion toward the outer peripheral side groove side surface. Have. The first protruding portion includes a first tip portion positioned at a tip protruding toward the side surface of the inner peripheral gutter, away from the side surface of the inner peripheral groove. The second protruding portion includes a second tip portion that is positioned away from the outer peripheral side groove side surface at the tip protruding toward the outer peripheral side groove side surface. The first protruding portion and the second protruding portion are located on either the first mating surface and the bottom of the groove rather than either of the first mating surface and the bottom of the groove in the direction in which the first mating surface and the bottom of the groove face each other. It is installed at a closer position. The first protruding portion and the second protruding portion are provided at positions closer to the bottom surface of the groove than the first mating surface in the direction in which the first mating surface and the bottom surface of the groove face each other.
The arrangement structure of the sealing material according to another aspect of the present invention has a first member having a first mating surface and a second mating surface facing the first mating surface, and is recessed from the second mating surface to be annular. It is provided with a second member in which a groove extending to the surface is formed, and a closed annular sealing material which is housed in the groove and seals between the first member and the second member. The second member further has a groove bottom surface that faces the first mating surface and forms the bottom wall of the groove portion, and a groove side surface that rises from the groove bottom surface toward the second mating surface and forms a side wall of the groove portion. The groove side surface is composed of an inner peripheral side groove side surface arranged on the inner peripheral side of the groove portion and an outer peripheral side groove side surface arranged on the outer peripheral side of the groove portion. The sealing material includes a base portion that comes into contact with the first mating surface and the bottom surface of the groove, a first protruding portion that protrudes from the base portion toward the inner peripheral side groove side surface, and a second protruding portion that protrudes from the base portion toward the outer peripheral side groove side surface. Have. The first protruding portion includes a first tip portion positioned at a tip protruding toward the side surface of the inner peripheral gutter, away from the side surface of the inner peripheral groove. The second protruding portion includes a second tip portion that is positioned away from the outer peripheral side groove side surface at the tip protruding toward the outer peripheral side groove side surface. The first protruding portion and the second protruding portion are located on either the first mating surface and the bottom of the groove rather than either of the first mating surface and the bottom of the groove in the direction in which the first mating surface and the bottom of the groove face each other. It is installed at a closer position.

According to the arrangement structure of the sealing material configured in this way, when a force in the direction of rotating the base is applied to the sealing material, either the first protruding portion or the second protruding portion is placed on either the first mating surface or the bottom surface of the groove. By contacting with one or the other, the sealing material is prevented from rolling. At this time, since the protruding portion is provided at a position closer to either the first mating surface or the bottom surface of the groove than the one of the first mating surface and the bottom surface of the groove, the protruding portion is first provided at an earlier timing. It can be brought into contact with either the mating surface or the bottom surface of the groove. As a result, the rolling of the sealing material can be prevented more reliably.

Further, preferably, the first protruding portion and the second protruding portion are provided at positions closer to the groove bottom surface than the first mating surface in the direction in which the first mating surface and the groove bottom surface face each other.

According to the arrangement structure of the sealing material configured in this way, when the sealing material is attached to the groove portion, the protruding portion is less likely to protrude from the groove portion.

Further, preferably, when the sealing material is cut by a plane orthogonal to the tangential direction of the closed annular sealing material in a state where no force is applied to the sealing material from the first member and the second member, the base portion is the first. It has a curved shape at a position facing the mating surface and the bottom surface of the groove.

According to the arrangement structure of the sealing material configured in this way, the inside of the sealing material is excessive until the first protruding portion or the second protruding portion abuts on either the first mating surface or the bottom surface of the groove. It is possible to suppress the generation of stress.

Further, preferably, the protruding portion is provided over the entire circumference of the sealing material.
According to the arrangement structure of the sealing material configured in this way, the rolling of the sealing material can be prevented more reliably.

Further, preferably, a fluid space accompanied by pressure pulsation is formed on the inner peripheral side or the outer peripheral side of the sealing material.

According to the arrangement structure of the sealing material configured in this way, even when a minute reciprocating sliding occurs between the first member and the second member due to the pressure pulsation in the fluid space, the sealing material Can be prevented from rolling.

As described above, according to the present invention, it is possible to provide a seal material arrangement structure that more reliably prevents the seal material from rolling.

It is a top view which shows the sealing material. It is sectional drawing which shows the process of attaching the seal material in FIG. 1 to a groove portion. It is sectional drawing which shows the state which the seal material in FIG. 1 is attached to the groove part. It is sectional drawing which shows the deformation of the sealing material at the time of reciprocating sliding of the 1st member in FIG. It is sectional drawing which shows the deformation of the sealing material at the time of reciprocating sliding of the 1st member in FIG. It is sectional drawing which shows various deformation examples of the sealing material in Embodiment 1. FIG. It is sectional drawing which shows the process of mounting a seal material in a groove | region in the arrangement structure of a seal material in Embodiment 3 of this invention. It is sectional drawing which shows the state which the seal material is attached to the groove | region in the arrangement structure of the seal material in Embodiment 3 of this invention.

Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are designated by the same reference numerals.

(Embodiment 1)
FIG. 1 is a plan view showing a sealing material. FIG. 2 is a cross-sectional view showing a step of mounting the sealing material in FIG. 1 in the groove portion. FIG. 3 is a cross-sectional view showing a state in which the sealing material in FIG. 1 is attached to the groove portion (a state in which fluid pressure does not act on the sealing material).

In the present specification, in particular, the state of the sealing material alone shown in FIG. 1 is referred to as an "unmounted state", and the state of the sealing material shown in FIG. 2 is referred to as an "initial state".

With reference to FIGS. 1 to 3, the arrangement structure of the sealing material in the present embodiment includes the sealing material 110, the first member 21, and the second member 31.

The sealing material 110 is an annular sealing material, and is used to seal between the first member 21 and the second member 31. The sealing material 110 is formed of an elastic member such as rubber. Examples of the rubber material used for the sealing material 110 include fluororubber, silicon rubber, and EPDM rubber having a hardness of about 60 to 70 HA.

The first member 21 has a first mating surface 22. The second member 31 has a second mating surface 32. The first member 21 and the second member 31 are arranged so that the first mating surface 22 and the second mating surface 32 face each other.

The material forming the first member 21 and the second member 31 is not particularly limited, but in the present embodiment, the first member 21 is formed of resin and the second member 31 is formed of metal.

A groove 35 is formed in the second member 31. The sealing material 110 is housed in the groove 35. The groove 35 is recessed from the second mating surface 32 and extends in an annular shape. The groove portion 35 has a groove shape that opens in the second mating surface 32 and extends in the plane of the second mating surface 32. The shape in which the groove 35 extends in an annular shape is not particularly limited, and is, for example, a circle, an ellipse, or a rectangle.

The groove portion 35 has a groove bottom surface 36 and a groove side surface 37. The groove bottom surface 36 faces the first mating surface 22 and forms the bottom wall of the groove portion 35. The groove bottom surface 36 is arranged parallel to the second mating surface 32. The groove bottom surface 36 is arranged parallel to the first mating surface 22. The groove side surface 37 rises from the groove bottom surface 36 toward the second mating surface 32 and forms a side wall of the groove portion 35.

The groove side surface 37 is composed of an inner peripheral side groove side surface 37m and an outer peripheral side groove side surface 37n. The inner peripheral side groove side surface 37m is arranged on the inner peripheral side of the groove portion 35, and the outer peripheral side groove side surface 37n is arranged on the outer peripheral side of the groove portion 35. The inner peripheral side groove side surface 37m and the outer peripheral side groove side surface 37n face each other with the groove bottom surface 36 interposed therebetween.

In the present embodiment, the groove bottom surface 36 and the groove side surface 37 (inner peripheral side groove side surface 37 m, outer peripheral side groove side surface 37n) are connected while being curved. The angle formed by the extension line of the groove bottom surface 36 and the extension line of the groove side surface 37 is 90 ° or more. The opening width of the groove portion 35 (the length between the inner peripheral side groove side surface 37m and the outer peripheral side groove side surface 37n on the second mating surface 32) is the depth of the groove portion 35 (the length between the second mating surface 32 and the groove bottom surface 36). ) Is larger than.

The sealing material 110 has a base portion 11 and a first protruding portion 12m and a second protruding portion 12n as constituent portions thereof (hereinafter, when the first protruding portion 12m and the second protruding portion 12n are not particularly distinguished, the sealing material 110 has a base portion 11 and a first protruding portion 12m and a second protruding portion 12n. Simply referred to as "protruding portion 12").

The base portion 11 forms the main portion of the sealing material 110, and has a function of sealing between the first member 21 and the second member 31. That is, the base portion 11 is in contact with the first mating surface 22 and the groove bottom surface 36. The base portion 11 is compressed and deformed in a direction in which the first mating surface 22 and the groove bottom surface 36 are close to each other.

In the unmounted state (that is, a state in which no force is applied to the sealing material 110 from the first member 21 and the second member 31), the sealing material 110 is cut by a plane orthogonal to the tangential direction of the sealing material 110 extending in a closed annular shape. In this case, the base portion 11 has a curved shape at a position facing the first mating surface 22 and the groove bottom surface 36. In the present embodiment, the curvature of the base portion 11 at the position facing the bottom surface 36 of the groove is smaller than the curvature of the base portion 11 at the position facing the first mating surface 22.

The protruding portion 12 is integrally molded with the base portion 11. The first protruding portion 12 m protrudes from the base portion 11 toward the inner peripheral side groove side surface 37 m. The second protruding portion 12n protrudes from the base portion 11 toward the outer peripheral side groove side surface 37n. The first protruding portion 12m and the second protruding portion 12n are provided symmetrically with the base portion 11 interposed therebetween. The sealing material 110 has a shape symmetrical with respect to the base 11.

The first protruding portion 12m has a collar shape protruding from the base portion 11 toward the inner peripheral side thereof. The second protruding portion 12n has a collar shape that protrudes from the base portion 11 to the outer peripheral side thereof. The first protruding portion 12 m protrudes inward in the radial direction of the sealing material 110 from the base portion 11. The second protruding portion 12n protrudes outward from the base portion 11 in the radial direction of the sealing material 110. The length (thickness) of the protrusion 12 in the direction in which the first mating surface 22 and the groove bottom surface 36 face each other is smaller than the length (thickness) of the base portion 11 in the direction in which the first mating surface 22 and the groove bottom surface 36 face each other. .. The first protruding portion 12m and the second protruding portion 12n are provided over the entire circumference of the sealing material 110.

The first protruding portion 12m has a first tip portion 13m as a constituent portion thereof, and the second protruding portion 12n has a second tip portion 13n as a constituent portion thereof (hereinafter, the first tip portion 13m and the first protruding portion 12n). 2 When the tip portion 13n is not particularly distinguished, it is simply referred to as “tip portion 13”).

The first tip portion 13m is provided at the tip of the first protruding portion 12m that protrudes from the base portion 11 toward the inner peripheral side groove side surface 37m. In the direction in which the inner peripheral side groove side surface 37m and the outer peripheral side groove side surface 37n face each other, the first tip portion 13m is arranged closest to the inner peripheral side groove side surface 37m among the sealing materials 110. In the direction in which the inner peripheral side groove side surface 37m and the outer peripheral side groove side surface 37n face each other, the first tip portion 13m is arranged farthest from the outer peripheral side groove side surface 37n in the sealing material 110.

The first tip portion 13m is positioned away from the inner peripheral side groove side surface 37m. The first tip portion 13m is positioned away from the inner peripheral side groove side surface 37m in a state where no fluid pressure acts on the sealing material 110 shown in FIG. A gap is provided between the first tip portion 13 m and the inner peripheral side groove side surface 37 m.

The second tip portion 13n is provided at the tip of the second protruding portion 12n that protrudes from the base portion 11 toward the outer peripheral side groove side surface 37n. The second tip portion 13n is arranged closest to the outer peripheral side groove side surface 37n of the sealing material 110 in the direction in which the inner peripheral side groove side surface 37m and the outer peripheral side groove side surface 37n face each other. In the direction in which the inner peripheral side groove side surface 37m and the outer peripheral side groove side surface 37n face each other, the second tip portion 13n is arranged farthest from the inner peripheral side groove side surface 37m in the sealing material 110.

The second tip portion 13n is positioned away from the outer peripheral side groove side surface 37n. The second tip portion 13n is positioned away from the outer peripheral side groove side surface 37n in a state where no fluid pressure acts on the sealing material 110 shown in FIG. A gap is provided between the second tip portion 13n and the outer peripheral side groove side surface 37n.

The first protruding portion 12m and the second protruding portion 12n are more than the first mating surface 22 as either one of the first mating surface 22 and the groove bottom surface 36 in the direction in which the first mating surface 22 and the groove bottom surface 36 face each other. , The first mating surface 22 and the groove bottom surface 36 are provided at positions closer to the groove bottom surface 36 as the other. The first protruding portion 12m and the second protruding portion 12n are provided in contact with the groove bottom surface 36 by compressing and deforming the sealing material 110 between the first mating surface 22 and the groove bottom surface 36.

When the sealing material 110 is cut by a plane orthogonal to the tangential direction of the sealing material 110 extending in a closed annular state in the non-mounted state, the first protruding portion 12m has a curved shape at a position facing the inner peripheral side groove side surface 37m. The second protruding portion 12n has a curved shape at a position facing the outer peripheral side groove side surface 37n.

4 and 5 are cross-sectional views showing deformation of the sealing material when the first member in FIG. 3 slides back and forth.

With reference to FIGS. 4 and 5, a fluid space accompanied by pressure pulsation is formed on the inner peripheral side of the sealing material 110 (the side of the inner peripheral side groove side surface 37 m as viewed from the sealing material 110). In such a configuration, the first member 21 undergoes minute reciprocating sliding in the direction in which the inner peripheral side groove side surface 37m and the outer peripheral side groove side surface 37n face each other.

As shown in FIG. 4, when the first member 21 slides in the direction from the inner peripheral side groove side surface 37 m toward the outer peripheral side groove side surface 37n, the portion of the base portion 11 that contacts the first mating surface 22 becomes the first member 21. While being pulled in a direction approaching the outer peripheral side groove side surface 37n with the movement of the groove, the portion of the base portion 11 in contact with the groove bottom surface 36 tends to stand still due to frictional resistance with the second member 31. As a result, a force that tends to rotate the base portion 11 in the direction approaching the outer peripheral side groove side surface 37n acts on the sealing material 110. At this time, the second protruding portion 12n comes into contact with the groove bottom surface 36 (more specifically, the corner portion between the groove bottom surface 36 and the outer peripheral side groove side surface 37n) to prevent the sealing material 110 from rolling.

As shown in FIG. 5, when the first member 21 slides in the direction from the outer peripheral side groove side surface 37n to the inner peripheral side groove side surface 37m, the portion of the base portion 11 that contacts the first mating surface 22 becomes the first member 21. While being pulled in a direction approaching the inner peripheral side gutter side surface 37 m with the movement of the gutter, the portion of the base portion 11 in contact with the groove bottom surface 36 tends to stand still due to frictional resistance with the second member 31. As a result, a force that tends to rotate the base portion 11 in the direction approaching the inner peripheral side groove side surface 37 m acts on the sealing material 110. At this time, the first protruding portion 12m comes into contact with the groove bottom surface 36 (more specifically, the corner portion between the groove bottom surface 36 and the inner peripheral side groove side surface 37m) to prevent the sealing material 110 from rolling. ..

In the present embodiment, the first protruding portion 12m and the second protruding portion 12n are provided at positions closer to the groove bottom surface 36 than the first mating surface 22 in the direction in which the first mating surface 22 and the groove bottom surface 36 face each other. Has been done. With such a configuration, when the first member 21 slides back and forth, the first protruding portion 12m or the second protruding portion 12n comes into contact with the groove bottom surface 36 at an earlier timing, so that the sealing material 110 rolls more reliably. Can be prevented.

Further, in the present embodiment, the base portion 11 has a curved shape at a position facing the first mating surface 22 and the groove bottom surface 36. According to such a configuration, when the first member 21 slides back and forth, the sealing material 110 is moved in the rotation direction of the base portion 11 until the first protruding portion 12m or the second protruding portion 12n comes into contact with the groove bottom surface 36. It can be transformed smoothly. As a result, it is possible to prevent excessive internal stress from being generated in the sealing material 110.

That is, in the arrangement structure of the sealing material in the present embodiment, the first protruding portion 12m or the second protruding portion 12n abuts on the groove bottom surface 36 while allowing the initial base portion 11 of the sealing material 110 to be deformed in the rotational direction. After that, by preventing the sealing material 110 from rolling further, it is intended to extend the life of the sealing material 110 while preventing the sealing material 110 from being damaged.

In the present embodiment, the case where the fluid space is formed on the inner peripheral side of the sealing material 110 has been described, but the fluid space may be formed on the outer peripheral side of the sealing material 110. The fluid arranged in the fluid space may be a gas or a liquid.

The arrangement structure of the seal material according to the first embodiment of the present invention described above will be collectively described. The arrangement structure of the seal material according to the present embodiment includes the first member 21 having the first mating surface 22 and the first member 21. A second member 31 having a second mating surface 32 facing the first mating surface 22 and having a groove portion 35 recessed from the second mating surface 32 and extending in an annular shape, and the first member 21 and the groove portion 35 accommodated in the groove portion 35. A closed annular sealing material 110 that seals between the second members 31 is provided. The second member 31 faces the first mating surface 22, the groove bottom surface 36 forming the bottom wall of the groove 35, and the groove side surface 37 rising from the groove bottom surface 36 toward the second mating surface 32 and forming the side wall of the groove 35. And further. The groove side surface 37 includes an inner peripheral side groove side surface 37m arranged on the inner peripheral side of the groove portion 35 and an outer peripheral side groove side surface 37n arranged on the outer peripheral side of the groove portion 35. The sealing material 110 has a base portion 11 that contacts the first mating surface 22 and the groove bottom surface 36, a first protruding portion 12 m that protrudes from the base portion 11 toward the inner peripheral side groove side surface 37 m, and a base portion 11 toward the outer peripheral side groove side surface 37 n. It has a second protruding portion 12n that protrudes from the ground. The first protruding portion 12m includes a first tip portion 13m positioned at a tip protruding toward the inner peripheral side groove side surface 37m away from the inner peripheral side groove side surface 37m. The second protruding portion 12n includes a second tip portion 13n positioned at a tip protruding toward the outer peripheral side groove side surface 37n, away from the outer peripheral side groove side surface 37n. The first protruding portion 12m and the second protruding portion 12n are more than the first mating surface 22 as either one of the first mating surface 22 and the groove bottom surface 36 in the direction in which the first mating surface 22 and the groove bottom surface 36 face each other. , The first mating surface 22 and the groove bottom surface 36 are provided at positions closer to the groove bottom surface 36 as the other.

According to the arrangement structure of the sealing material according to the first embodiment of the present invention configured in this way, the rolling of the sealing material 110 can be prevented more reliably. Since rolling of the sealing material is likely to occur when the diameter of the sealing material is large (for example, φ400 mm or more), the present invention is particularly effectively used in such a large-diameter sealing material.

(Embodiment 2)
In this embodiment, various modifications of the sealing material according to the first embodiment will be described. FIG. 6 is a cross-sectional view showing various modifications of the sealing material according to the first embodiment. In FIG. 6, the cross-sectional shape of the sealing material in the unmounted state is shown.

As shown in FIGS. 6A and 6B, the protrusion length of the protrusion 12 is not particularly limited. The base portion 11 and the protruding portion 12 may have a linear cross section at a position facing the bottom surface 36 of the groove.

As shown in FIGS. 6C and 6D, the cross-sectional shape of the tip portion 13 of the protruding portion 12 may be a linear shape parallel to the direction in which the first mating surface 22 and the groove bottom surface 36 face each other. However, it may have a sharp shape.

As shown in FIGS. 6 (E) and 6 (F), in the protruding portion 12, the length (thickness) of the protruding portion 12 in the direction in which the first mating surface 22 and the groove bottom surface 36 face each other is different from the base portion 11 to the tip portion. It may have a cross-sectional shape that gradually becomes smaller toward 13. The cross-sectional shape of the tip portion 13 of the protruding portion 12 may be a sharp shape or a curved shape.

According to the arrangement structure of the sealing material according to the second embodiment of the present invention configured in this way, the action and effect described in the first embodiment can be similarly exhibited.

(Embodiment 3)
FIG. 7 is a cross-sectional view showing a step of mounting the sealing material in the groove in the arrangement structure of the sealing material according to the third embodiment of the present invention. FIG. 8 is a cross-sectional view showing a state in which the sealing material is attached to the groove in the arrangement structure of the sealing material according to the third embodiment of the present invention. 7 and 8 are views corresponding to FIGS. 2 and 3, respectively, in the first embodiment.

The arrangement structure of the sealing material in the present embodiment basically has the same structure as the arrangement structure of the sealing material in the first embodiment. Hereinafter, the description of the overlapping structure will not be repeated.

With reference to FIGS. 7 and 8, the arrangement structure of the sealing material in the present embodiment includes the sealing material 120 instead of the sealing material 110 in the first embodiment. The sealing material 120 has a base portion 11, a first protruding portion 12m, and a second protruding portion 12n as constituent portions thereof.

In the present embodiment, the first protruding portion 12m and the second protruding portion 12n are grooves as either one of the first mating surface 22 and the groove bottom surface 36 in the direction in which the first mating surface 22 and the groove bottom surface 36 face each other. It is provided at a position closer to the first mating surface 22 as either the first mating surface 22 or the groove bottom surface 36 than the bottom surface 36. The first protruding portion 12m and the second protruding portion 12n are provided in contact with the first mating surface 22 by compressing and deforming the sealing material 110 between the first mating surface 22 and the groove bottom surface 36.

According to the arrangement structure of the sealing material according to the third embodiment of the present invention configured in this way, the action and effect described in the third embodiment can be similarly exhibited.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

The present invention is applied to the arrangement structure of the sealing material on which hydraulic pressure, pneumatic pressure, etc. act.

11 Base, 12 Protruding part, 12m 1st protruding part, 12n 2nd protruding part, 13 Tip part, 13m 1st tip, 13n 2nd tip, 21 1st member, 22 1st mating surface, 31 2nd member , 32 Second mating surface, 35 groove part, 36 groove bottom surface, 37 groove side surface, 37m inner peripheral side groove side surface, 37n outer peripheral side groove side surface, 110, 120 sealing material.

Claims (4)

The first member having the first mating surface and
A second member having a second mating surface facing the first mating surface and forming a groove portion recessed from the second mating surface and extending in an annular shape.
A closed annular sealing material that is housed in the groove and seals between the first member and the second member is provided.
The second member faces the first mating surface and forms a bottom wall of the groove portion, and a groove side surface that rises from the groove bottom surface toward the second mating surface and forms a side wall of the groove portion. Have more
The groove side surface is composed of an inner peripheral side groove side surface arranged on the inner peripheral side of the groove portion and an outer peripheral side groove side surface arranged on the outer peripheral side of the groove portion.
The sealing material has a base portion that comes into contact with the first mating surface and the bottom surface of the groove, a first protruding portion that protrudes from the base portion toward the side surface of the inner peripheral gutter, and a protruding portion that protrudes from the base portion toward the side surface of the outer peripheral side groove. Has a second protrusion to
The first protruding portion includes a first tip portion positioned at a tip protruding toward the side surface of the inner peripheral gutter, away from the side surface of the inner peripheral groove.
The second protruding portion includes, at the tip protruding toward the outer peripheral side groove side surface, a second tip portion positioned away from the outer peripheral side groove side surface.
The first protruding portion and the second protruding portion are more than one of the first mating surface and the groove bottom surface in the direction in which the first mating surface and the groove bottom surface face each other. It is provided at a position closer to either one of the bottom surfaces of the groove .
The first protruding portion and the second protruding portion are provided at positions closer to the bottom surface of the groove than the first mating surface in the direction in which the first mating surface and the bottom surface of the groove face each other. Construction. When the sealing material is cut by a plane orthogonal to the tangential direction of the closed annular sealing material in a state where no force is applied to the sealing material from the first member and the second member, the base portion is formed by the first member. The arrangement structure of the sealing material according to claim 1, which has a curved shape at a position facing the mating surface and the bottom surface of the groove. The arrangement structure of the sealing material according to claim 1 or 2 , wherein the first protruding portion and the second protruding portion are provided over the entire circumference of the sealing material. Between the first member and the second member on the inner peripheral side of the sealing material, or between the first member and the second member on the outer peripheral side of the sealing material , the pressure is composed of gas or liquid. A space is formed in which the fluid with pulsation is placed ,
Any one of claims 1 to 3 , wherein the pressure pulsation of the fluid causes reciprocating sliding between the first member and the second member in a direction in which the inner peripheral side gutter side surface and the outer peripheral side groove side surface face each other. Arrangement structure of the sealing material according to item 1.

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