JP2011231781A - Sliding seal component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sliding seal component whose sliding-surface-side abutment is free from abrasion damage, has a low-friction surface, is superior in sealing performance and superior in durability.SOLUTION: The sliding seal component has an annular shape and is mounted in a seal groove formed on the sliding surface of a sliding member such as a piston. The sliding seal component has a cross-section of a composition of: the sliding-surface-side abutment which is arranged at a sliding-surface-side opening of the seal groove and extends in the thickness direction of the sliding seal component along the sliding-surface-side opening; a groove-bottom-side abutment which is arranged at a bottom of the seal groove and extends in the thickness direction of the sliding seal component along the bottom of the seal groove; and a bendable inclined elastic part which is formed incliningly extending from one side end of the sliding-surface-side abutment with respect to its thickness direction to the another side end of the groove-bottom-side abutments with respect to its thickness direction, the one side end being on a high pressure side with respect to the thickness direction of the sliding-surface-side abutment. Furthermore, the sealing by the sliding seal component can be performed by absorbing displacement between the sliding members such as the piston and a cylinder by deformation of the bendable inclined elastic part without sliding of the sliding seal component in case of very small operating distance of the sliding member such as the piston.

Description

  The present invention relates to a sliding sealing material used for sealing between sliding members such as between a piston and a cylinder.

  Conventionally, for example, a sliding sealing material 100 having a so-called S-shaped cross section as shown in FIG. 19 is known as a sliding sealing material that seals between sliding members such as between a piston and a cylinder. ing.

  As shown in FIG. 19, the sliding seal material 100 </ b> A is mounted in a rectangular seal groove 104 formed on the outer peripheral surface of the piston 102 of the piston cylinder mechanism 101, and seals between the piston 102 and the cylinder 106. Used for the purpose.

  As shown in FIG. 19, the sliding seal material 100 </ b> A includes an inner peripheral contact portion 110 that contacts the bottom surface 108 of the seal groove 104, and an outer peripheral contact portion 116 that contacts the inner wall 114 of the cylinder 106. It has. In addition, a bending elastic portion 118 is formed between the inner peripheral contact portion 110 and the outer peripheral contact portion 116.

  As shown in FIG. 19, the inner circumferential side abutting portion 110, the outer circumferential side abutting portion 116, and the bending elastic portion 118, as shown in FIG. 19, have a so-called S-shaped sliding sealing material 100A as a whole. Is configured.

  In the sliding seal material 100A, the flexural elastic portion 118 is compressed, and the elastic restoring force presses the inner peripheral side abutting portion 110 of the sliding seal material 100A against the bottom surface 108 of the seal groove 104 and the outer periphery. The side contact portion 116 is pressed against the inner wall 114 of the cylinder 106.

  Thereby, high sealing performance can be ensured by the repulsive force (elastic restoring force).

  As a sliding sealing material for sealing between sliding members, a sliding sealing material 100B having a so-called W-shaped cross section as shown in FIG. 20 is known.

  In this sliding seal material 100B, a bulging elastic portion 120 that bulges in the thickness direction is formed between the inner peripheral contact portion 110 and the outer peripheral contact portion 116.

  As shown in FIG. 20, the inner peripheral side contact part 110, the outer peripheral side contact part 116, and the bulging elastic part 120, as shown in FIG. 100B is configured.

  Also in this sliding seal material 100B, this bulging elastic portion 120 is compressed, and the inner peripheral side contact portion 110 of the sliding seal material 100A is pressed against the bottom surface 108 of the seal groove 104 by the elastic restoring force. The outer peripheral side contact portion 116 is pressed against the inner wall 114 of the cylinder 106.

  Thereby, high sealing performance can be ensured by the repulsive force (elastic restoring force).

  However, in the sliding seal material 100A having such a conventional cross-sectional shape so-called S-shape, for example, as shown in FIG. 21, when pressure from the high pressure side is applied to the slide seal material 100A, A force is applied as indicated by the arrow in FIG. 21, and the inner peripheral contact portion 110 of the sliding seal material 100 </ b> A is strongly pressed against the bottom surface 108 of the seal groove 104, and the outer peripheral contact portion 116 is It will be strongly pressed against the inner wall 114.

  As a result, the frictional resistance between the outer peripheral side contact portion 116 of the sliding sealing material 100A and the inner wall 114 of the cylinder 106, that is, the sliding resistance increases. As a result, the piston cylinder mechanism itself may be affected, and the outer peripheral side abutting portion 116 of the sliding seal material 100A may be worn and damaged, resulting in a decrease in sealing performance.

  This is the same for the sliding seal material 100B having a so-called W-shaped cross section as shown by the arrow in FIG.

  In the present invention, in view of such a current situation, even when pressure from the high pressure side is applied to the sliding sealing material, the sliding surface side contact portion is the sealing surface of the mating member of the sliding portion, for example, In addition, it is not strongly pressed against the inner wall of the cylinder, and the frictional resistance, that is, the sliding resistance is small. As a result, there is no possibility of affecting the mechanism itself, and the sliding surface of the sliding sealing material It is an object of the present invention to provide a sliding sealing material that is free from wear damage on side contact portions, has low friction, has excellent sealing properties, and has excellent durability.

The present invention has been invented in order to achieve the problems and objects in the prior art as described above.
An annular sliding sealing material mounted in a sealing groove formed on the sliding surface,
The sliding seal material has a cross-sectional shape of
A sliding surface side contact portion that is disposed in the sliding surface side opening of the seal groove and extends in the thickness direction of the sliding sealing material along the sliding surface side opening;
A bottom-side contact portion that is disposed at the bottom of the seal groove and extends in the thickness direction of the sliding seal material along the bottom of the seal groove;
An inclined bending elastic portion extending obliquely from one end portion in the thickness direction of the sliding surface side contact portion to the other end portion in the thickness direction of the bottom side contact portion;
It is formed so that it may have.

  With this configuration, for example, when sealing between two spaces having a pressure difference, a high-pressure fluid is inclined from the one end side in the thickness direction of the sliding surface side contact portion. It penetrates into the space surrounded by the bending elastic part and the bottom side contact part.

  As a result, the inclined bending elastic portion is pressed to the low pressure side, and the vicinity of the other end portion in the thickness direction of the bottom side contact portion of the inclined bending elastic portion is bent to the low pressure side. The contact portion side is slightly pulled toward the bottom side of the seal groove.

  As a result, the sliding surface side contact portion is not strongly pressed against, for example, the inner wall of the cylinder, which is the sealing surface of the mating member of the sliding portion, and the frictional resistance, that is, the sliding resistance is reduced.

Therefore, there is no risk of affecting the mechanism itself of various mechanisms, and the sliding surface side contact portion of the sliding seal material is not worn and damaged, and has low friction, excellent sealing properties, and durability. An excellent sliding seal material can be provided.

  Further, at an extremely small working distance, the sliding sealing material can be absorbed by deformation of the inclined bending elastic portion without sliding.

  Further, the sliding seal material of the present invention is characterized in that it is mounted in the seal groove so that one end portion in the thickness direction of the sliding surface side contact portion is located on the high pressure side.

  Thus, the one end side in the thickness direction of the sliding surface side abutting portion is positioned on the high pressure side, so that the high pressure fluid from the high pressure side is from the one end side in the thickness direction of the sliding surface side abutting portion. It penetrates into the space surrounded by the inclined bending elastic part and the bottom side contact part.

  As a result, the inclined bending elastic portion is pressed to the low pressure side, and the vicinity of the other end portion in the thickness direction of the bottom side contact portion of the inclined bending elastic portion is bent to the low pressure side. The contact portion side is slightly pulled toward the bottom side of the seal groove.

  As a result, the sliding surface side contact portion is not strongly pressed against, for example, the inner wall of the cylinder, which is the sealing surface of the mating member of the sliding portion, and the frictional resistance, that is, the sliding resistance is reduced.

  Therefore, there is no risk of affecting the mechanism itself of various mechanisms, and the sliding surface side contact portion of the sliding seal material is not worn and damaged, and has low friction, excellent sealing properties, and durability. An excellent sliding seal material can be provided.

  The sliding seal material of the present invention is characterized in that an annular sliding ring portion is formed on the surface of the sliding surface side contact portion.

  Thus, if an annular sliding ring portion is formed on the surface of the sliding surface side contact portion, it is a sealing surface of the mating member of the sliding portion as compared with the conventional sliding seal, for example, The sliding resistance between the inner wall of the cylinder and the sliding surface side contact portion can be extremely reduced.

  The sliding seal material of the present invention is characterized in that the sliding ring portion is formed of a fluororesin, a high-functional resin, or a fluororubber.

  Thus, if the sliding ring portion is made of fluororesin, high-functional resin, or fluororubber having a low frictional resistance, the seal of the mating member of the sliding portion is compared to the conventional sliding seal. For example, the sliding resistance between the inner wall of the cylinder and the sliding surface side contact portion, which is a surface, can be extremely reduced.

  The sliding seal material of the present invention is characterized in that an annular projecting pressing portion is formed on the surface on the sliding surface side contact portion side.

  As described above, when the annular projecting pressing portion is formed on the surface on the sliding surface side contact portion side as described above, the sliding surface side contact portion side is slightly on the bottom side of the seal groove. Even if it is pulled, this annular projecting pressing portion remains pressed, and there is no possibility that the sealing performance will deteriorate.

  Further, the sliding seal material of the present invention is characterized in that a plurality of the protruding pressing portions are formed at predetermined intervals.

  In this way, if the protruding pressing portions are formed in a plurality of strips at a predetermined interval, as described above, even if the sliding surface side contact portion side is slightly pulled toward the bottom side of the seal groove, The plurality of annular projecting pressing portions remain pressed, and there is no possibility that the sealing performance is deteriorated.

  According to the present invention, for example, when sealing between two spaces having a pressure difference, a high-pressure fluid from the high-pressure side is inclined and bent elastically from one end side in the thickness direction of the sliding surface-side contact portion. It penetrates into the space surrounded by the bottom part and the bottom side contact part.

  As a result, the inclined bending elastic portion is pressed to the low pressure side, and the vicinity of the other end portion in the thickness direction of the bottom side contact portion of the inclined bending elastic portion is bent to the low pressure side. The contact portion side is slightly pulled toward the bottom side of the seal groove.

  As a result, the sliding surface side contact portion is not strongly pressed against, for example, the inner wall of the cylinder, which is the sealing surface of the mating member of the sliding portion, and the frictional resistance, that is, the sliding resistance is reduced.

  Therefore, there is no risk of affecting the mechanism itself of various mechanisms, and the sliding surface side contact portion of the sliding seal material is not worn and damaged, and has low friction, excellent sealing properties, and durability. An excellent sliding seal material can be provided.

  Further, at an extremely small working distance, the sliding sealing material can be absorbed by deformation of the inclined bending elastic portion without sliding.

FIG. 1 is a plan view of a sliding seal material of the present invention. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a schematic cross-sectional view showing a state in which the sliding seal material of the present invention is mounted in the piston-side seal groove of the piston cylinder mechanism. 4 is a partially enlarged cross-sectional view of FIG. FIG. 5 is a partially enlarged cross-sectional view for explaining the use state of the sliding seal material of the present invention. FIG. 6 is a cross-sectional view of another embodiment of the sliding seal material of the present invention. FIG. 7 is a cross-sectional view illustrating a usage state of another embodiment of the sliding seal material of the present invention. FIG. 8 is a cross-sectional view illustrating a usage state of another embodiment of the sliding seal material of the present invention. FIG. 9 is a cross-sectional view illustrating a usage state of another embodiment of the sliding seal material of the present invention. FIG. 10 is a cross-sectional view similar to FIG. 2 of a sliding seal material according to another embodiment of the present invention. FIG. 11 is a plan view of the sliding sealing material of the present invention. 12 is a cross-sectional view taken along line AA of FIG. FIG. 13 is a schematic cross-sectional view showing a state in which a sliding seal material according to another embodiment of the present invention is mounted in a seal groove on the cylinder side of a piston cylinder mechanism. 14 is a partially enlarged cross-sectional view of FIG. FIG. 15 is a partially enlarged cross-sectional view for explaining the usage state of the sliding seal material of the present invention. FIG. 16 is a cross-sectional view illustrating a usage state of another embodiment of the sliding seal material of the present invention. FIG. 17 is a cross-sectional view illustrating a usage state of another embodiment of the sliding seal material of the present invention. FIG. 18 is a cross-sectional view illustrating a usage state of another embodiment of the sliding seal material of the present invention. FIG. 19 is a schematic sectional view showing a conventional sliding sealing material. FIG. 20 is a schematic cross-sectional view showing a conventional sliding seal material. FIG. 21 is a partially enlarged cross-sectional view for explaining the usage state of the sliding seal material of FIG. FIG. 22 is a partially enlarged cross-sectional view for explaining the usage state of the sliding seal material of FIG.

  Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.

  1 is a plan view of the sliding seal material of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a seal on the piston side of the piston cylinder mechanism of the slide seal material of the present invention. FIG. 4 is a partially enlarged sectional view of FIG. 3 and FIG. 5 is a partially enlarged sectional view for explaining the use state of the sliding seal material of the present invention.

  1-4, the code | symbol 10 has shown the sealing material for sliding of this invention on the whole.

  As shown in FIG. 1, the sliding sealing material 10 is an annular sealing material, and its cross-sectional shape is located on the outer peripheral side of the sliding sealing material 10 as shown in FIG. A sliding surface side contact portion 12 extending in the thickness direction of the material 10, a bottom side contact portion 14 positioned on the inner peripheral side of the sliding seal material 10 and extending in the thickness direction of the sliding seal material 10; It has an inclined bending elastic part 16 extending obliquely from one end part 12 a in the thickness direction of the sliding surface side contact part 12 to the other end part 14 a in the thickness direction of the bottom side contact part 14.

  Further, as shown in FIGS. 2 and 4, an annular projecting pressing portion 18 is formed on the surface of the sliding surface side contact portion 12. In this embodiment, a plurality of (three) protruding pressing portions 18 are formed at a predetermined interval.

  In the case of the sliding seal material 10 of this embodiment, the sliding surface side contact portion 12 is formed on the outer peripheral surface of the piston 20 of the piston cylinder mechanism 11 as shown in FIGS. The seal groove 22 is disposed in the sliding surface side opening 24 and extends in the thickness direction of the sliding seal material 10 along the sliding surface side opening 24.

  Further, the bottom-side contact portion 14 is disposed at the bottom portion 26 of the seal groove 22 of the piston 20 and extends in the thickness direction of the sliding seal material 10 along the bottom portion 26 of the seal groove 22.

  As shown in FIG. 4, the inclined bending elastic portion 16 extends from the one end portion 12 a in the thickness direction of the sliding surface side contact portion 12 to the other end portion 14 a in the thickness direction of the bottom side contact portion 14. The sliding seal material 10 as a whole is substantially N-shaped.

  In the case of the sliding sealing material 10 of this embodiment, the upper side in FIGS. 3 and 4, that is, the side in the thickness direction one end portion 12 a of the sliding surface side contact portion 12 is located on the high pressure side. As shown in FIG.

In this case, when the sliding seal material 10 is mounted in the seal groove 22 of the piston 20, the bottom side contact portion 14 is pressed against the bottom portion 26 of the seal groove 22 and the sliding surface side contact portion 12.
Is pressed against the inner wall 30 of the cylinder 28 and inserted in a compressed state, that is, its radial length L1, that is, from the outer surface of the sliding surface side contact portion 12 to the bottom side contact portion 14. A distance L1 to the outer surface (projecting pressing portion 18) is set to be slightly larger than a distance L2 from the bottom portion 26 of the seal groove 22 to the sliding surface side opening 24.

  The sliding sealing material 10 of the present invention configured as described above functions as shown in FIG.

  That is, in FIG. 5, the state of a continuous line has shown the state where the pressure is not applied to the sliding sealing material 10 of this invention.

  From this state, when the pressure from the high pressure side is applied to the sliding seal material 10, as shown by the arrow in FIG. From the side of the part 12a, it enters the space S1 surrounded by the inclined bending elastic part 16 and the bottom side contact part 14.

  Thereby, as shown by the arrow A in FIG. 5, the inclined bending elastic portion 16 is pressed to the low pressure side, and the bottom end side contact portion 14 of the inclined bending elastic portion 16 on the other end portion 14 a side in the thickness direction. As shown by the dotted line in FIG. 5, the vicinity 16a is bent toward the low pressure side.

  Accordingly, as shown by an arrow B in FIG. 5, the sliding surface side contact portion 12 side is slightly pulled toward the bottom portion 26 side of the seal groove 22. Further, as indicated by an arrow C in FIG. 5, the bottom side contact portion 14 is slightly pulled also to the sliding surface side opening 24 side of the seal groove 22.

  As a result, the sliding surface side contact portion 12 is not strongly pressed against the inner wall 30 of the cylinder 28 which is the sealing surface of the mating member of the sliding portion, and the frictional resistance, that is, the sliding resistance is reduced.

  Therefore, there is no possibility of affecting the piston cylinder mechanism itself, and the sliding surface side contact portion 12 of the sliding seal material 10 is not worn and damaged, and has low friction, excellent sealing performance, and durability. An excellent sliding seal material 10 can be provided.

  Further, at an extremely small working distance, the sliding sealing material 10 can be absorbed by deformation of the inclined bending elastic portion 16 without sliding.

  In this case, it is desirable that a plurality of annular protruding pressing portions 18 be formed on the surface on the sliding surface side contact portion 12 side, and as described above, the sliding surface side contact portion 12. As shown in FIG. 5, even if the side is slightly pulled toward the bottom 26 side of the seal groove 22, the annular projecting pressing portion 18 is a sealing surface of the mating member of the sliding portion. The inner wall 30 is still pressed against the inner wall 30 and the sealing performance is not lowered.

  Although not shown in the drawings, by setting the radial length L1, that is, the distance L1 from the outer surface of the sliding surface side contact portion 12 to the outer surface of the bottom side contact portion 14, the protruding pressing portion 18 is Of course, it is possible not to provide it.

  In this case, the number of the projecting pressing portions 18, the projecting distance, the separation distance, and the like may be appropriately selected depending on the portion of the mechanism to be sealed, the environment to be sealed, the pressure, and the like, and are not particularly limited.

2, the width T1 of the sliding surface side contact portion 12 and the width T2 of the bottom side contact portion 14 are used.
Are substantially the same width.

  However, for example, as shown in FIG. 6, by making the width T <b> 2 of the bottom-side contact portion 14 smaller than the width T <b> 1 of the sliding surface-side contact portion 12, If the vicinity 16a on the other end 14a side in the thickness direction of the contact portion 14 is bent by the low pressure side as shown by the dotted line in FIG. 5, the side of the sliding surface side contact portion 12 becomes the seal groove 22. Is pulled by the side of the bottom portion 26, and the sliding resistance is reduced.

  Accordingly, in consideration of such operational effects, a ratio T1: T2 between the width T1 of the sliding surface side contact portion 12 (the width including the protruding pressing portion 18) and the width T2 of the bottom side contact portion 14 is considered. Is preferably 1: 1 to 1: 1.5.

  Further, the width T3 of the inclined bending elastic part 16 may be appropriately selected depending on the portion of the mechanism to be sealed, the environment to be sealed, the pressure, the aforementioned effect of bending to the low pressure side, etc., and is not particularly limited. Considering the above-described effect of bending toward the low pressure side, the ratio T1: T3 of the width T3 of the inclined bending elastic portion 16 to the width T1 of the sliding surface side contact portion 12 is 1: 0.3 to 1. : 1 is desirable.

  Further, the material of the sliding sealing material 10 may be set as appropriate depending on the portion of the mechanism to be sealed, the environment to be sealed, the pressure, etc., and is not particularly limited. For example, it can be formed of a synthetic rubber material such as nitrile rubber, hydrogenated nitrile rubber, fluorine rubber, silicone rubber, urethane rubber, ethylene propylene rubber, and cloth-filled rubber.

  In this embodiment, for convenience of explanation, the piston cylinder mechanism 11 and the sliding seal material 10 are arranged so that the upper side is the high pressure side in FIGS. 3 and 4, but as shown in FIG. The piston cylinder mechanism 11 and the sliding seal material 10 may be arranged so that the lower side becomes the high-pressure side. As shown in FIGS. 8 and 9, the so-called horizontally installed piston cylinder mechanism has a sliding seal material. It is also possible to arrange 10.

  FIG. 10 is a cross-sectional view similar to FIG. 2 of a sliding seal material according to another embodiment of the present invention.

  The sliding sealing material 10 of this embodiment has basically the same configuration as the sliding sealing material 10 of the embodiment shown in FIGS. 1 to 5, and the same reference numerals are given to the same constituent members. A detailed description thereof will be omitted.

  In the sliding seal material 10 of this embodiment, an annular sliding ring portion 32 is formed on the surface of the sliding surface side contact portion 12.

  Thus, if the annular sliding ring portion 32 is formed on the surface of the sliding surface side contact portion 12, it is a sealing surface of the mating member of the sliding portion as compared with the conventional sliding seal. The sliding resistance between the inner wall 30 of the cylinder 28 and the sliding surface side contact portion 12 can be extremely reduced.

  In this case, it is desirable that the sliding ring portion 32 be formed of a fluororesin, a high-functional resin, or fluororubber.

That is, the sliding ring portion 32 can be formed of a fluororesin material rich in slidability or a resin material called a high-functional resin. For example, PTFE (polytetrafluoroethylene), PFA (tetrafluoroethylene) , FEP (tetrafluoroethylene), ETFE (tetrafluoroethylene), PVDF (polyvinylidene fluoride), PCT
It can be formed from various fluorine resins such as FE (polychlorotrifluoroethylene) and ECTFE (chlorotrifluoroethylene), and high-functional resins such as polyamide, polyacetal, polyethylene, and cloth-containing phenol.

  As described above, when the sliding ring portion 32 is formed of a fluororesin, a high-functional resin, or a fluororubber having a low frictional resistance, the mating member of the sliding portion is compared with the conventional sliding seal. The sliding resistance between the inner wall 30 of the cylinder 28, which is the sealing surface, and the sliding surface side contact portion 12 can be extremely reduced.

  In this case, the method for forming the annular sliding ring portion 32 on the surface of the sliding surface side contact portion 12 is not particularly limited. For example, simultaneous molding, adhesive, fusion bonding, and fitting The engagement by can be used.

  Also in this case, it is desirable that a plurality of annular protruding pressing portions 18 ′ are formed on the surface on the sliding surface side contact portion 12 side, that is, on the surface of the sliding ring portion 32. .

  11 is a plan view of the sliding sealing material of the present invention, FIG. 12 is a cross-sectional view taken along line AA of FIG. 11, and FIG. 13 is a piston-cylinder mechanism for the sliding sealing material of another embodiment of the present invention. FIG. 14 is a partially enlarged sectional view of FIG. 13, and FIG. 15 is a partially enlarged sectional view for explaining the usage state of the sliding seal material of the present invention. is there.

  The sliding sealing material 10 of this embodiment has basically the same configuration as the sliding sealing material 10 of the embodiment shown in FIGS. 1 to 5, and the same reference numerals are given to the same constituent members. A detailed description thereof will be omitted.

  In the sliding sealing material 10 of this embodiment, as shown in FIG. 11, the cross-sectional shape is located on the inner peripheral side of the sliding sealing material 10 as shown in FIG. A sliding surface side abutting portion 12 extending in the thickness direction, a bottom side abutting portion 14 positioned on the outer peripheral side of the sliding sealing material 10 and extending in the thickness direction of the sliding sealing material 10, and a sliding surface An inclined bending elastic portion 16 that extends obliquely from one end portion 12a in the thickness direction of the side contact portion 12 to the other end portion 14a in the thickness direction of the bottom side contact portion 14 is provided.

  Moreover, in the sliding sealing material 10 of the embodiment shown in FIGS. 1 to 5, as shown in FIGS. 3 and 4, the sliding surface side contact portion 12 is provided on the outer periphery of the piston 20 of the piston cylinder mechanism 11. The bottom surface side contact portion 14 is disposed at the bottom portion 26 of the seal groove 22 of the piston 20 while being disposed in the sliding surface side opening 24 of the seal groove 22 formed on the surface.

  In contrast, in the sliding seal material 10 of this embodiment, as shown in FIGS. 13 and 14, the sliding surface side contact portion 12 is formed on the inner wall 30 of the cylinder 28 of the piston cylinder mechanism 11. In addition, the bottom surface side contact portion 14 is disposed at the bottom portion 26 ′ of the seal groove 22 ′ of the cylinder 28.

  In this embodiment, the sliding action is basically the same as that of the sliding seal material 10 of the embodiment shown in FIGS. 1 to 5, and the details are shown in FIG. Is omitted.

In this embodiment, for convenience of explanation, the piston cylinder mechanism 11 and the sliding seal material 10 are arranged so that the upper side is the high pressure side in FIGS. 12 and 13, but as shown in FIG. The piston cylinder mechanism 11 and the sliding seal material 10 may be arranged so that the lower side becomes the high-pressure side. As shown in FIGS. It is also possible to arrange 10.

  Also, in the sliding seal material 10 of this embodiment, although not shown, an annular slide is formed on the surface of the sliding surface side contact portion 12 as in the sliding seal material 10 of the embodiment shown in FIG. It is also possible to form the moving ring portion 32.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this. For example, in the above embodiment, the sliding seal material 10 of the present invention is used as the seal portion of the piston cylinder mechanism. However, it can also be applied to, for example, a packing for a rotary shaft seal and a packing for a rod seal.

  Further, in the above embodiment, when sealing between two spaces having a pressure difference, that is, the sealing surface side contact portion 12 is sealed so that the thickness direction one end portion 12a side is positioned on the high pressure side. Although used in the groove 22, various modifications can be made without departing from the object of the present invention, such as the case where two fluids having no pressure difference are sealed.

  INDUSTRIAL APPLICABILITY The present invention can be used, for example, as a sliding sealing material used for sealing between sliding members such as a packing for a rotating shaft and a packing for a rod seal between a piston and a cylinder.

DESCRIPTION OF SYMBOLS 10 Sliding sealing material 11 Piston cylinder mechanism 12 Sliding surface side contact part 12a Direction one end part 14 Bottom part side contact part 14a Other end part 16 Inclined bending elastic part 16a Neighborhood 18 Protruding press part 20 Piston 22 Seal groove 24 Sliding Moving surface side opening portion 26 Bottom portion 28 Cylinder 30 Inner wall 32 Sliding ring portion 100A Sliding sealing material 100B Sliding sealing material 101 Piston cylinder mechanism 102 Piston 104 Seal groove 106 Cylinder 108 Bottom surface 110 Inner peripheral side abutting portion 114 Inner wall 116 Outer periphery Side contact portion 118 Bending elastic portion 120 Swelling elastic portion

Claims (6)

An annular sliding sealing material mounted in a sealing groove formed on the sliding surface,
The sliding seal material has a cross-sectional shape of
A sliding surface side contact portion that is disposed in the sliding surface side opening of the seal groove and extends in the thickness direction of the sliding sealing material along the sliding surface side opening;
A bottom-side contact portion that is disposed at the bottom of the seal groove and extends in the thickness direction of the sliding seal material along the bottom of the seal groove;
An inclined bending elastic portion extending obliquely from one end portion in the thickness direction of the sliding surface side contact portion to the other end portion in the thickness direction of the bottom side contact portion;
It is formed so that it may have. The sealing material for sliding characterized by the above-mentioned.   The sliding seal material according to claim 1, wherein one end portion in the thickness direction of the sliding surface side contact portion is mounted in the seal groove so as to be positioned on the high pressure side.   The sliding sealing material according to claim 1, wherein an annular sliding ring portion is formed on a surface of the sliding surface side contact portion.   The sliding seal member according to claim 3, wherein the sliding ring portion is made of a fluororesin, a high-functional resin, or fluororubber.   The sliding sealing material according to any one of claims 1 to 4, wherein an annular projecting pressing portion is formed on a surface on the sliding surface side contact portion side.   6. The sliding sealing material according to claim 5, wherein a plurality of the protruding pressing portions are formed at a predetermined interval.

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