JP5599292B2 - Sealing device - Google Patents

Description

  The present invention relates to a plate-like sealing device arranged so as to straddle two opposing grooves.

  Conventionally, in order to seal between two opposing surfaces, a plate-like sealing device is known that is disposed so as to straddle two opposing grooves. For example, with respect to a block or the like that supports a blade of a gas turbine, a technique using a plate-like sealing device to seal a gap between adjacent blocks is known (see Patent Document 1 and Patent Document 2).

  The sealing device according to the prior art has secured flexibility by using one or a plurality of thin plate materials, but due to the low strength of the plate material, unintended deformation or breakage during assembly or use. Has a problem that it is easy to occur. On the other hand, if a thick plate is used as the sealing device, the sealing device may not be able to deform following the warping or undulation of the groove.

Japanese Patent Laid-Open No. 11-050805 Japanese Patent Laid-Open No. 2006-220047

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a seal having a flexible sealable surface that can be deformed following the deformation of the mating member, and exhibiting a suitable sealing performance. It is to provide a member.

In order to solve the above-described problems, a sealing device according to the present invention includes a first groove portion formed on a first facing surface and having a first seal wall surface substantially perpendicular to the first facing surface, and the first facing surface. A second facing surface facing the surface is disposed so as to straddle a second groove portion that is formed to face the first groove portion and has a second seal wall surface substantially perpendicular to the second facing surface. A plate-like sealing device for sealing a gap between the first facing surface and the second facing surface,
A main body seal surface in contact with the first seal wall surface and the second seal wall surface;
A main body rear surface opposite to the main body seal surface;
The main body seal surface and the main body back surface are connected along the longitudinal direction of the main body seal surface and the main body back surface, and have a first main body side surface and a second main body side surface facing in opposite directions,
The back surface of the main body is formed with one or more continuous groove portions extending from the side surface of the first main body to the side surface of the second main body along a direction intersecting the longitudinal direction.

  Since the continuous groove part which continues from one main body side surface to the other main body side surface is formed in the main body back surface of the sealing device which concerns on this invention along the direction which cross | intersects with a longitudinal direction, such a sealing device is formed. The side of the main body seal surface in the longitudinal direction is easily bent, and has good flexibility that can follow the deformation of the first groove and the second groove in which the sealing device is accommodated. Further, in the sealing device, since the continuous groove is formed on the back surface of the main body, even when the main body seal surface is warped to be on the outer peripheral side or when it is warped to be on the inner peripheral side, fluid can flow from the main body groove portion. There is no risk of leakage, and it has a suitable sealing performance. In addition, the sealing device according to the present invention can increase the thickness of the plate-like portion while providing flexibility in the longitudinal direction, and therefore is not easily damaged during assembly or use, and has high durability. Furthermore, the sealing device according to the present invention has a simple structure and is easy to manufacture.

  A plurality of the continuous groove portions that are substantially parallel to each other may be formed on the back surface of the main body at a predetermined interval.

  Since such a sealing device has flexibility with high homogeneity along the longitudinal direction of the sealing surface, the main body sealing surface has higher followability to deformation of each sealing wall surface, and is suitable. Has sealing performance. Such a sealing device also has better flexibility, especially with respect to simple bending directions.

  Further, the main body back surface has a first continuous groove portion having a first angle with respect to the longitudinal direction, and a second angle different from the first angle with respect to the longitudinal direction, A plurality of continuous groove portions including a second continuous groove portion intersecting with the one continuous groove portion may be formed.

  In such a sealing device, a plurality of grooves having different angles are formed, and in particular, the twisting direction (the direction in which one end portion in the longitudinal direction of the main body sealing surface rotates relative to the other end portion). The flexibility at the time of deformation is improved, and it has good flexibility that can follow various deformations of the first groove portion and the second groove portion in which the sealing device is accommodated. In addition, since the first continuous groove portion and the second continuous groove portion intersect with each other, it is possible to form continuous groove portions having different angles with respect to the long side direction with high density, and in particular, good flexibility in the twist direction. Have.

FIG. 1 is a cross-sectional view illustrating a sealing device according to an embodiment of the present invention and a facing groove in which the sealing device is disposed. FIG. 2 is a perspective view showing an arrangement state of the sealing device and the first block shown in FIG. FIG. 3 is a perspective view of the sealing device shown in FIG. FIG. 4 is a perspective view showing a state where the sealing device shown in FIG. 3 is deformed. FIG. 5A to FIG. 5F schematically illustrate the sealing device according to the present embodiment and the sealing device according to the reference example, and a state before or during deformation of the facing groove in which these sealing devices are arranged. It is sectional drawing represented to. FIG. 6 is a perspective view of a sealing device according to the second embodiment of the present invention. FIG. 7 is a perspective view of a sealing device according to the third embodiment of the present invention. FIG. 8 is a perspective view of a sealing device according to the fourth embodiment of the present invention.

  FIG. 1 is a cross-sectional view illustrating a sealing device 10 according to an embodiment of the present invention and a facing groove 52 in which the sealing device 10 is disposed. The sealing device 10 is disposed in an opposing groove 52 formed between the first block 50a and the second block 50b that are disposed adjacent to each other. In the present embodiment, the blocks 50a and 50b are blocks that support the blades of the gas turbine, but the application of the seal device 10 is not limited to this.

  The sealing device 10 is a plate-like sealing device that seals a gap between the first opposing surface 51a of the first block 50a and the second opposing surface 51b of the second block 50b (for the overall shape of the sealing device 10). (See FIG. 3 etc.) The sealing device 10 includes a main body sealing surface 22 that contacts a wall surface of the opposing groove 52 to seal a fluid, a main body back surface 24 that is the opposite surface of the main body sealing surface 22, a first main body side surface 26 a that is a longitudinal side surface, It has the 2nd main body side surface 26b. Since the main body sealing surface 22 side is the low pressure side and the main body back surface 24 side is the high pressure side with respect to the sealing device 10, the sealing device 10 has a wall surface (first surface) facing the main body sealing surface 22 inside the facing groove 52. It is pressed against the seal wall surface 54a and the second seal wall surface 54b) by the pressure of the fluid.

  As shown in FIG. 2 showing the arrangement state of the sealing device 10 and the first block 50a, a first groove 52a is formed in the first facing surface 51a of the first block 50a, and a seal is formed in the first groove 52a. A part of the device 10 is stored. In FIG. 2, the second block 50b is not shown, and only the schematic shape of the sealing device 10 is displayed.

  The first groove 52a has a first seal wall surface 54a perpendicular to the first facing surface 51a. The first seal wall surface 54a is in contact with the main body seal surface 22 of the seal device 10 and constitutes a seal surface that seals fluid. As shown in FIG. 1, in addition to the first seal wall surface 54a, the first groove 52a includes a first opposing wall surface 56a facing the first seal wall surface 54a, a first seal wall surface 54a, and a first opposing wall surface 56a. And a first connection wall surface 58a to be connected.

  A second groove 52b is formed on the second facing surface 51b facing the first facing surface 51a so as to face the first groove 52a. The 2nd groove | channel 52b has a shape substantially symmetrical with the 1st groove | channel 52a, and has the 2nd seal | sticker wall surface 54b perpendicular | vertical to the 2nd opposing surface 51b similarly to the 1st groove | channel 52a. Similarly to the first seal wall surface 54a, the second seal wall surface 54b is in contact with the main body seal surface 22 of the seal device 10 and constitutes a seal surface that seals fluid. In addition to the second seal wall surface 54b, the second groove 52b includes a second counter wall surface 56b that faces the second seal wall surface 54b, and a second connection wall surface 58b that connects the second seal wall surface 54b and the second counter wall surface 56b. Have

  By arranging the first groove 52a and the second groove 52b so as to face each other, the opposed groove constituted by the first groove 52a and the second groove 52b between the first opposed surface 51a and the second opposed surface 51b. 52 is formed.

  The sealing device 10 is disposed so as to straddle between the first groove 52a and the second groove 52b. The main body seal surface 22 of the sealing device 10 contacts both the first seal wall surface 54a and the second seal wall surface 54b, and seals the gap between the first opposed surface 51a and the second opposed surface 51b. As shown in FIG. 2, the sealing device 10 has an elongated plate shape, and the second main body side surface 26 b connects the main body sealing surface 22 and the main body back surface 24 along the longitudinal direction. As shown in FIG. 1, the second main body side surface 26b is disposed so as to face the second connection wall surface 58b of the second groove 52b. The main body seal surface 22 and the main body back surface 24 are connected along the longitudinal direction, and the first main body side surface 26a facing the direction opposite to the second main body side surface 26b is opposed to the first connection wall surface 58a of the first groove 52a. To be arranged.

  As shown in FIG. 3, a plurality of continuous grooves 28 that are parallel to each other are formed on the back surface 24 of the main body of the sealing device 10. The continuous groove portion 28 is continuous from the first main body side surface 26a to the second main body side surface 26b along a direction perpendicular to the longitudinal direction. Moreover, the continuous groove part 28 is formed in the whole main body back surface 24 at predetermined intervals. The pitch L2 for forming the continuous groove 28 may be about 1/20 to 1/5 with respect to the length L1 of the sealing device 10 in the longitudinal direction. Although it is preferable for imparting flexibility, it is not particularly limited. Further, the depth D2 of the continuous groove portion 28 is preferably about 1/10 to 2/3 of the thickness D1 of the sealing device 10 from the viewpoint of providing flexibility while ensuring strength. There is no particular limitation.

  FIG. 4 is a perspective view illustrating a state in which the sealing device 10 is deformed. In the sealing device 10, the portion where the continuous groove portion 28 is formed can be bent with a smaller force than the other portions. For this reason, in the sealing device 10, the side 22 a in the longitudinal direction of the main body sealing surface 22 is easily bent by the action of bending with the continuous groove portion 28 as a fulcrum. On the other hand, the rigidity in the short side direction of the sealing device 10 can be ensured by appropriately designing the thickness D1 of the sealing device 10 even if the continuous groove portion 28 is provided. Therefore, the sealing device 10 is damaged even when the interval between the first groove 52a and the second groove 52b in which the sealing device 10 is accommodated is narrowed or the first groove 52a and the second groove 52b are displaced. There is an effect that it is difficult to do.

  The sealing device 10 is made of a Ni-base heat-resistant alloy, a Co-base heat-resistant alloy, or the like so as to exhibit suitable sealing performance in a high temperature environment, but is not particularly limited. Moreover, although the continuous groove part 28 is formed by carrying out the machining etc. of the main body back surface 24, it is not specifically limited.

  FIG. 5A to FIG. 5F show the sealing device 10 according to this embodiment, the sealing device 110 according to the reference example, and the facing groove 52 where the sealing devices 10 and 110 are disposed before or during the deformation. It is sectional drawing which represented the state typically. 5 (a), 5 (c) and 5 (e) show cross sections along the short side direction of the sealing devices 10 and 110, and FIG. 5 (b), FIG. 5 (d) and FIG. FIG. 5F shows a cross section along the long side direction of the sealing devices 10 and 110 corresponding to FIGS. 5A, 5C, and 5E.

  5A and 5B show a contact state between the sealing device 110 according to the reference example and the facing groove 52 before deformation. The sealing device 110 is the same as the sealing device 10 according to this embodiment except that the continuous groove portion is not formed on the back surface of the main body. As shown in FIG. 5B, in a state before the facing groove 52 is deformed, the main body sealing surface 122 of the sealing device 110 contacts the second sealing wall surface 54 b of the facing groove 52 over the entire longitudinal direction. doing.

  FIG. 5C and FIG. 5D show the contact state between the sealing device 110 according to the reference example and the opposing groove 52 being deformed. As shown in FIGS. 5C and 5D, the facing groove 52 may be deformed by the influence of thermal stress or the like. As apparent from FIG. 5 (d), the sealing device 110 according to the reference example is insufficiently flexible and cannot be deformed following the opposing groove 52 being deformed. A gap is formed between 122 and the second seal wall surface 54b. Thereby, in the sealing device 110 according to the reference example, a leak occurs.

  FIG. 5E and FIG. 5F show a contact state between the sealing device 10 according to the embodiment of the present invention and the opposing groove 52 being deformed. As apparent from FIG. 5 (f), the sealing device 10 is sufficiently flexible due to the continuous groove portion 28 formed in the main body back surface 24. It can deform | transform so that the opposing groove | channel 52 may be followed. Thereby, in the sealing apparatus 10, the contact with the main body sealing surface 22 and the 2nd sealing wall surface 54b is maintained over the whole longitudinal direction, and the sealing apparatus 10 has favorable sealing performance. Moreover, in the sealing device 10, the continuous groove part 28 for providing flexibility is formed in the main body back surface 24, and the main body seal surface 22 is smooth along the longitudinal direction. For this reason, as shown in FIG. 5 (f), the sealing device 10 warps so that the main body seal surface 22 is on the inner peripheral side even when the main body seal surface 22 is warped on the outer peripheral side. Even in this case, since the deformation of the continuous groove portion 28 hardly affects the smoothness of the main body seal surface 22, the sealing performance is suitable.

  As described above, the sealing device 10 has a flexibility in which the main body sealing surface 22 can be deformed following the deformation of the sealing wall surfaces 54a and 54b of the facing groove 52, and exhibits a favorable sealing performance. In addition, the sealing device 10 can ensure the overall strength by increasing the thickness of the plate-like portion while providing flexibility in the longitudinal direction, and thus is difficult to break during assembly or use, and has high durability. . Furthermore, the sealing device 10 has a simple structure and is easy to manufacture.

Other Embodiments FIG. 6 is a perspective view of a sealing device 12 according to a second embodiment of the present invention. The seal device 12 is the same as the seal device 10 except that the seal surface protrusions 32a and 32b are formed on the main body seal surface 32. The seal device 12 has seal surface protrusions 32 a and 32 b formed at both ends of the main body seal surface 32 in the short side direction. The seal surface protrusions 32a and 32b extend along the longitudinal direction of the main body seal surface 32 and come into contact with the first seal wall surface 54a and the second seal wall surface 54b shown in FIG.

  The sealing device 12 having the sealing surface protrusions 32a and 32b has the main body sealing surface 32 and the sealing wall surface 54a even when the positions of the first sealing wall surface 54a and the second sealing wall surface 54b are shifted in the thickness direction of the sealing device 12. , 54b can be stably maintained. Therefore, the sealing device 12 exhibits good sealing performance even when the first groove 52a and the second groove 52b constituting the facing groove 52 are relatively displaced. Moreover, the sealing device 12 has the same effect as the sealing device 10 according to the first embodiment.

  FIG. 7 is a perspective view of the sealing device 14 according to the third embodiment of the present invention. The sealing device 14 is different from the sealing device 10 according to the first embodiment except that the continuous groove portion 48 formed in the main body back surface 44 is a slit shape with a small groove width. The continuous groove portion 48 is formed to be continuous from the first main body side surface 46a to the second main body side surface 46b, similarly to the continuous groove portion 28 according to the first embodiment.

  In the sealing device according to the present invention, the shape of the continuous groove formed on the back surface of the main body is not particularly limited, and the slit-shaped continuous groove 48 shown in FIG. 7, the continuous groove 28 having a circular arc shape shown in FIG. Various shapes can be used. Moreover, the continuous groove part formed in a main body back surface is not limited to what is extended in linear form, You may extend in curvilinear form, such as circular arc shape. Note that the sealing device 14 according to the third embodiment shown in FIG. 7 also has the same effect as the sealing device 10 according to the first embodiment.

  FIG. 8 is a perspective view of a sealing device 16 according to the fourth embodiment of the present invention. The sealing device 16 is different from the sealing device 10 in that the continuous groove portion formed on the back surface 64 of the main body includes a first cross groove portion 68b and a second cross groove portion 68c in addition to the continuous groove portion 68a substantially perpendicular to the longitudinal direction. The other points are the same. The continuous groove portion 68a, the first intersecting groove portion 68b, and the second intersecting groove portion 68c are formed to be continuous from the first main body side surface 66a to the second main body side surface 66b, similarly to the continuous groove portion 28 according to the first embodiment. .

  The first intersecting groove 68 b has a first angle α that is not perpendicular to the longitudinal direction of the main body back surface 64, and the second intersecting groove 68 c has a first angle α with respect to the longitudinal direction of the main body back surface 64. Have different angles and have a second angle β that is not perpendicular to the longitudinal direction. Further, the first intersecting groove 68b and the second intersecting groove 68c intersect each other.

  When the sealing device 16 is bent by using the first intersecting groove 68b or the second intersecting groove 68c as a fulcrum, the longitudinal side 22a of the main body seal surface 22 is easily bent in the twisting direction. Therefore, the sealing device 16 has good flexibility that can follow various deformations of the first groove 52a and the second groove 52b in which the sealing device 16 is accommodated. In the sealing device 16, the first angle α and the second angle β are in a complementary relationship, and the sealing device 16 has flexibility that is substantially symmetrical with respect to both twist directions. The relationship between the angle α and the second angle β is not limited to this. Further, the sealing device 16 can form continuous groove portions having different angles with respect to the long side direction at a high density by intersecting the first intersecting groove portion 68b and the second intersecting groove portion 68c, and in particular, twisting. Good flexibility with respect to direction.

10, 12, 14, 16 ... sealing devices 22, 32 ... main body sealing surfaces 26a, 46a, 66a ... first main body side surfaces 26b, 46b, 66b ... second main body side surfaces 28, 48, 68a ... continuous groove portions 68b, 68c ... crossing Groove
50a ... 1st block 50b ... 2nd block 51a ... 1st opposing surface 51b ... 2nd opposing surface 52 ... Opposing groove 52a ... 1st groove 52b ... 2nd groove 54a ... 1st sealing wall surface 54b ... 2nd sealing wall surface 56a ... 1st opposing wall surface 56b ... 2nd opposing wall surface

Claims (4)

A first groove portion formed on the first facing surface and having a first seal wall surface substantially perpendicular to the first facing surface, and a second facing surface facing the first facing surface so as to face the first groove portion. And a second groove portion having a second seal wall surface substantially perpendicular to the second facing surface, and is disposed between the first seal wall surface and the second seal wall surface by the pressure of fluid. A plate-like sealing device that is pressed to seal a gap between the first facing surface and the second facing surface;
A main body seal surface in contact with the first seal wall surface and the second seal wall surface and facing the low pressure side ;
A rear panel facing the high pressure side I opposite surface der of the body sealing surface,
The main body seal surface and the main body back surface are connected along the longitudinal direction of the main body seal surface and the main body back surface, and have a first main body side surface and a second main body side surface facing in opposite directions,
One or more continuous groove portions that are continuous from the first main body side surface to the second main body side surface are formed on the rear surface of the main body along a direction intersecting the longitudinal direction. apparatus.   The sealing device according to claim 1, wherein a plurality of the continuous groove portions that are substantially parallel to each other are formed on the back surface of the main body at a predetermined interval.   The main body back surface has a first continuous groove portion having a first angle with respect to the longitudinal direction, and a second angle different from the first angle with respect to the longitudinal direction, and the first continuous groove portion. The sealing device according to claim 1, wherein a plurality of the continuous groove portions including a second continuous groove portion intersecting with the groove portions are formed. The seal device according to any one of claims 1 to 3, wherein the seal device is made of a Ni-base heat-resistant alloy or a Co-base heat-resistant alloy.

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