JP2010196797A - Sealant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealant capable of securing the machinability of a plate material of a place contacting a moving blade, by partially arranging a brazing material used when sticking a large number of plate materials, without extending it to the whole of a contact part of the plate materials, and preventing damage to a moving blade when contacting the moving blade. <P>SOLUTION: This sealant 10 is constituted by arranging a plurality of plate materials 11 and 12 so as to mutually cross in the thickness direction, and is characterized in that a slit 14 for fitting the other plate material 12 is arranged in at least one (the plate material 11) of the mutually crossing plate materials 11 and 12, and the slit 14 forms a narrow part 14B for densely fitting the other plate material 11 and an expanded part 14A formed wider in width than this narrow part 14B and having the clearance 18 between the other plate material 12 and itself, and the mutually crossing plate materials 11 and 12 form a plane shape having the same shape in the plurality of directions as a whole. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure of a sealing material applied to a high-temperature honeycomb seal for a gas turbine, such as between a tip portion of a moving blade and a split ring or between an inner shroud of a stationary blade and a platform of the moving blade.

Conventionally, in a gas turbine, a high temperature for a gas turbine that provides resistance to leakage air between the tip of the rotor blade and the split ring, or between the inner shroud of the stationary blade and the platform of the rotor blade. A honeycomb seal is disposed, and such a honeycomb seal is attached to a split ring or a stationary blade so that gas does not leak from the tip of the moving blade.
As this honeycomb seal, a cellular structure as shown in Patent Document 1 is adopted. For example, a honeycomb sealing material denoted by reference numeral 1 in FIGS. 9A and 9B is a honeycomb structure fixed to the upper surface of the base material 2 by a heat-treated brazing material 3, and such a honeycomb structure Thus, even if the tip of the moving blade comes into contact, the honeycomb sealing material 1 is scraped to prevent damage to the split ring and the stationary blade.

Specifically, the honeycomb sealing material 1 is configured as shown in the plan view of FIG. The honeycomb sealing material 1 forms a hexagonal honeycomb shape by spot-welding the thin plate material (plate material) 4 in which irregularities are alternately formed by pressing so that the convex portions are in close contact with each other, As shown in FIG. 9 described above, the honeycomb sealing material 1 is pasted onto the base material 2 via the brazing material 3 to constitute a sealing structure.
At this time, the brazing material 3 between the honeycomb sealing material 1 and the base material 2 penetrates into the gap (reference numeral 5) where the thin plate material 4 is joined by capillarity, thereby ensuring the overall rigidity. It is like that.
Note that the plan view shown in FIG. 11 shows a state in which the moving blade F crosses the honeycomb sealing material 1 in the direction of arrow A, and the tip of the moving blade F and the like are attached to the honeycomb sealing material 1. Even if they come into contact with each other, the honeycomb sealing material 1 side is scraped to prevent the stationary blade F from being damaged.

Japanese Patent No. 4083009

  By the way, the honeycomb sealing material 1 as described above has a hexagonal honeycomb structure in which a large number of thin plate materials 4 are bonded together, and the portion where the hexagonal sides overlap doubly is only hard because it is double. Instead, when brazing on the base material 2, the brazing material 3 is sucked up by the capillary phenomenon so as to follow the gap 5 of the double thin plate material 4, thereby ensuring the overall rigidity. is there. However, due to such high rigidity, the machinability of the thin plate material 4 is reduced, and when the blade F comes into contact with the blade F, there is a problem that the blade F is scraped off.

  The present invention has been made in view of the above-described circumstances, and the brazing material 3 used when a large number of thin plate materials (plate materials) 4 are bonded together does not reach the entire contact portion of the thin plate material 4. By providing a partial arrangement, a seal capable of ensuring the machinability of the thin plate material 4 at the portion in contact with the blade F and preventing the blade F from being damaged when in contact with the blade F. The purpose is to provide materials.

  In order to solve the above problems, the present invention proposes the following means. That is, in the present invention, a sealing material is configured by arranging a plurality of plate members so as to cross each other in the thickness direction, and at least one of the plate members crossing each other is provided with a slit into which the other plate member is fitted. The slit is formed with a narrow portion into which the other plate material is closely fitted, and an enlarged portion formed wider than the narrow portion and having a gap between the other plate material, As a whole, a planar shape in which the same shape is continuous in a plurality of directions is formed.

  In the sealing material of the present invention, the sealing material is brazed to the base material on the narrow portion side.

  In the sealing material of the present invention, the slit formed in the one-side plate material is formed in a tapered shape having an enlarged portion at the upper portion and a narrow portion at the lower portion.

  Further, in the sealing material of the present invention, the slit formed in the one-side plate material has an enlarged portion having the same width and width in the upper portion and a narrow portion having the same width and width in the lower portion, and It is characterized in that it is formed in a shape having a step portion between the enlarged portion and the narrow portion.

According to the present invention, a slit into which the other plate member is fitted is provided in at least one of the plate members that intersect with each other, and the slit is formed to be narrower than the other plate member, and to be wider than the narrow portion. When the other plate member is fitted, an enlarged portion that forms a gap with the other plate member is provided. Therefore, when the plate member is fixed to the base material, the other plate member is caused by capillary action. The brazing material penetrates into the narrow portion of the slit in which is tightly fitted, and one and the other plate materials are fixed in the narrow portion.
As a result, in the enlarged portion having a gap with the other plate material, the movement of both plate materials is not restricted. As a result, for example, the seal of the present invention is provided between the tip of the moving blade and the split ring. In the case where the material is installed, the machinability of the plate material at the location where the blade comes into contact with the blade can be ensured, and even when the blade is in contact with the blade, the blade can be prevented from being damaged. can get.

The perspective view of the sealing material which shows Example 1 of this invention. The top view which shows the positional relationship of the sealing material of Example 1, and a moving blade. The perspective view of the sealing material which shows Example 2 of this invention. Specific example 1 of the sealing material to which this invention was applied. Specific example 2 of the sealing material to which this invention was applied. Specific Example 3 of the sealing material to which the present invention is applied. Specific example 4 of the sealing material to which this invention was applied. The perspective view which shows the example in the case of applying this invention to the sealing material of FIGS. (A) The perspective view which shows the positional relationship of a sealing material and a base material, (B) The front view of said (A). The top view which shows the conventional sealing material. The top view which shows the moving blade which moves on a sealing material.

  A first embodiment of the present invention will be described with reference to FIGS. A reference numeral 10 in FIG. 1 denotes a sealing material according to the first embodiment, and is configured in a planar shape as a whole by a plurality of plate materials 11 and 12 arranged so as to cross each other in the thickness direction.

In FIG. 1, a lower plate member 11 is a plate member on one side whose lower part is fixed to a base material (base material 2 shown in FIG. 9) by brazing.
The plate member 11 is an upper portion of the plate member main body 13 and has a slit 14 having a tapered gap in which the width is gradually reduced toward the lower portion at a constant interval along the length direction of the plate member main body 13. Are arranged and formed. With such a configuration, a wide enlarged portion 14A is formed at the upper portion of each slit 14, and a narrow narrow portion 14B into which the other plate member 12 is closely fitted is formed at the lower portion of the slit 14. Yes. Further, the slit 14 is formed up to the middle of the upper side of the plate body 13, and the lower side is a fitting surface 15 (described later) into which the other plate 12 is fitted.

  In FIG. 1, the plate member 12 located on the upper side is a plate member on the other side in which a narrow slit 17 having a rectangular shape as a whole is formed in the lower portion of the plate member main body 16, and the slit 17 is formed of the plate member. The plurality of slits 14 are arranged at the same pitch. In addition, the slits 17 are formed in a concave shape on the lower side of the plate material main body 16, and when fitted into the plate material 11 on one side, the narrow portion 14 </ b> B of the slit 14 and the fitting surface located below the slit 14. 15 is fitted.

And in the sealing material 10 comprised in this way, the slit 17 of the board | plate material 12 of the other side is made into the slit of the board | plate material 11 by inserting the slit 14 and slit 17 which were formed in each of the board | plate materials 11 * 12 mutually. 14 is fitted into the narrow portion 14 </ b> B, and is in close contact with the fitting surface 15 below the slit 17. On the other hand, in the enlarged portion 14 </ b> A of the slit 14 of the plate material 11, a gap 18 is formed between the plate material 11 and the upper portion of the plate material 12 (indicated by reference numeral 12 </ b> A).
As a result, when the plate material 11 of the sealing material 10 is fixed to the base material (base material 2 shown in FIG. 9), the other plate material 12 and the narrow portion 14B of the slit 14 of the plate material 11 and the plate material due to capillary action. The brazing material permeates into a minute gap between the 11 fitting surfaces 15 and the brazing material in the gap fixes both the one and the other plate materials 11 and 12.
Thereby, in the enlarged portion 14A of the slit 14 of the plate member 11 having the gap 18 between the other plate member 12, the movement of the plate members 11 and 12 is not regulated. When the sealing material 10 is installed between the rings, it is possible to ensure the machinability of the plate materials 11 and 12 at the portions that come into contact with the moving blades.

  In the plate member 11 and the plate member 12 described above, for example, as shown in FIG. 2, by arranging the plate members 11 and 12 in a lattice shape, the sealing member 10 having a honeycomb structure in which the same shape is continued in a plurality of directions as a whole. Can be configured. At this time, the sealing material 10 is arranged so that the plate materials 11 and 12 are inclined with respect to the moving direction of the moving blade F (indicated by the arrow A), so that the moving blade F contacts the plate materials 11 and 12. Thus, the area where the moving blade F and the plate members 11 and 12 are in contact with each other at the same time can be reduced, and wear of the moving blade F can be prevented to a minimum. In FIG. 2, the crossing angle of the plate members 11 and 12 is set to be a right angle, but the crossing angle is not limited to a right angle, and the plate members 11 and 12 may be arranged to be inclined.

  As described above in detail, in the sealing material 10 shown in the first embodiment of the present invention, the slit 14 into which the other plate material 12 is fitted is provided in at least one plate material 11 of the plate materials 11 and 12 intersecting each other, and the slit 14 and a narrow portion 14B into which the other plate member 12 is closely fitted, and a gap 18 is formed between the narrow plate portion 12B and the other plate member 12 when the other plate member 12 is fitted into the narrow portion 14B. 14A, the narrow portion 14B of the slit 14 in which the other plate member 12 is closely fitted into one plate member 11 by capillarity when the sealing member 10 is fixed to the base material. The brazing material permeates, and one and the other plate materials 11 and 12 are fixed at the narrow portion 14B. Thereby, in the enlarged portion 14A of the one plate member 11 having the gap 18 between the other plate member 12, the movement of both the plate members 11 and 12 is not regulated. When the sealing material of the present invention is installed between the ring and the split ring, it is possible to ensure the machinability of the plate material at the location in contact with the moving blade F, and the contact with the moving blade F. Moreover, the effect which can prevent that this moving blade F is damaged is acquired.

A second embodiment of the present invention will be described with reference to FIG. In the second embodiment, parts having the same configurations as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
In the sealing material 20 of the second embodiment, the configuration different from that of the first embodiment is the shape of the slit 21 formed in the plate material 11 on one side. That is, the slit 14 of the first embodiment has a shape having a tapered gap in which the width is gradually reduced toward the lower part, the upper part of each slit 14 is a widened enlarged portion 14A, and the lower part of the slit 14 is narrower. Although it was set as the narrow part 14B, in the slit 21 of Example 2, it is set as the shape which does not become such a taper shape but has a step part.

  That is, in the slit 21 of Example 2, when the other plate member 12 is fitted, a widened enlarged portion 21A that forms a gap 22 between the plate member 12 is formed at the upper portion, and the other plate member is formed at the lower portion. Narrow narrow portions 21B that are just fitted into the twelve slits 17 are formed. The enlarged portion 21A and the narrow portion 21B of the slit 21 are formed so as not to be inclined and have the same width, and a step portion 21C is formed between the enlarged portion 21A and the narrow portion 21B.

And in the sealing material 20 comprised in this way, the slit 17 of the board | plate material 12 of the other side is made into the slit of the board | plate material 11 by mutually fitting the slit 21 and slit 17 which were formed in each of the board | plate materials 11 * 12. It fits in the narrow part 21B of 21, and is closely_contact | adhered to the fitting surface 15 located under the slit 21 of this board | plate material 11. FIG. On the other hand, in the enlarged portion 21A of the slit 21 of the plate member 11, a gap 22 is formed between the plate member 11 and the upper portion of the plate member 12 (indicated by reference numeral 12A).
As a result, when the plate material 11 of the sealing material 20 is fixed to the base material (the base material 2 shown in FIG. 9), the narrow plate portion 21B and the fitting of the other plate material 12 and the slit 21 of the plate material 11 due to capillary action. The brazing material permeates into a minute gap between the surface 15 and both the plate materials 11 and 12 are fixed by the brazing material in the gap.
Thereby, in the enlarged portion 21A of the slit 21 of the plate member 11 having the gap 22 between the other plate member 12, the movement of the plate members 11 and 12 is not restricted. When the sealing material 20 is installed between the ring, it is possible to ensure the machinability of the plate material at a location in contact with the moving blade.

  In addition, the sealing materials 10 and 20 of Examples 1 and 2 can be applied to a honeycomb sealing material in which the plate materials 11 and 12 are arranged in a lattice shape as shown in FIG. 2, as shown in FIGS. 4 to 7. Also, the present invention may be applied to a honeycomb sealing material having an intersecting overlap portion (indicated by reference numeral C) of the plate materials 11 and 12. In this case, at the intersection C of the plate members 11 and 12, for example, the plate member 12 on the other side is bent as shown in FIG. 8, and the bent portion 30 is fitted to the slit 14 or 21 of the plate member 11. Although the slit 17 to be formed may be formed, the fitting method is not particularly limited.

4 to 7, the honeycomb sealing material shown in FIG. 4 is a cell of the sealing material 10 or 20 composed of the plate materials 11 and 12. It is formed in a rhombus shape in plan view, and a crest portion thereof is chamfered to form an intersecting overlap portion C. Further, in the honeycomb sealing material shown in FIG. 4, the moving blade is installed so as to move in the arrow A direction along the diagonal line of the short side of the rhombus.
The honeycomb sealing material shown in FIG. 5 has a cross-overlap portion C similar to that in FIG. 4, and the cells of the sealing material 10 or 20 constituted by the plate materials 11 and 12 are formed in a substantially square shape in plan view, and This is an example in which the moving blade moves in the direction of arrow A along the diagonal line.
The honeycomb sealing material shown in FIG. 6 has a crossing overlapping portion C similar to that in FIG. 4, and the cells of the sealing material 10 or 20 constituted by the plate materials 11 and 12 are formed in a rhombus in plan view, and This is an example in which the moving blade moves in the direction of arrow A along the diagonal of the long side.
In FIG. 7, the plate members 11 and 12 are corrugated, and a crossover portion C similar to that in FIG. 4 is formed at a place where the tops of the waves meet.

  In addition, in the said Example, it can set suitably how much the fitting length of the slits 14 * 17 * 21 of the board | plate materials 11 * 12 is made. For example, the lengths of the slits 14 and 21 of the plate material 11 may be about half of the width direction of the plate material main body 13, and the length of the slits 17 of the plate material 12 may be adjusted according to this.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

  The present invention relates to a sealing material applied to a high-temperature honeycomb seal for a gas turbine, such as between a blade tip and a split ring, or between a stationary blade inner shroud and a blade platform.

DESCRIPTION OF SYMBOLS 10 Sealing material 11 Board | plate material 12 Board | plate material 14 Slit 14A Enlarged part 14B Narrow part 17 Slit 18 Crevice 20 Sealing material 21 Slit 21A Enlarged part 21B Narrow part

Claims (4)

A sealing material configured by arranging a plurality of plate materials so as to cross each other in the thickness direction,
A slit into which the other plate material is fitted is provided in at least one of the plate materials crossing each other,
This slit forms a narrow portion into which the other plate material is closely fitted, and an enlarged portion that is formed wider than this narrow portion and has a gap between the other plate material,
The plate material intersecting with each other has a planar shape in which the same shape is continued in a plurality of directions as a whole.   The sealing material according to claim 1, wherein the sealing material is brazed to a base material on the narrow portion side.   3. The seal according to claim 1, wherein the slit formed in the plate on the one side is formed in a tapered shape having an enlarged portion at an upper portion and a narrow portion at a lower portion. Wood.   The slit formed in the plate on the one side has an enlarged portion with the same width and width at the upper portion, and has a narrow portion with the same width and width at the lower portion, and between the enlarged portion and the narrow portion. The sealing material according to claim 1, wherein the sealing material is formed into a shape having a step portion.

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