JP2022099908A - High temperature component and rotary machine - Google Patents

Abstract

To suppress cooling ability from being reduced by closing a cooling passage in a high temperature component.SOLUTION: A high temperature component comprises: a plurality of cooling passages including a first channel and a second channel which are provided in parallel with each other, in a linear shape; and a plurality of communicating passages provided at mutually different positions in an extension direction of the first channel and the second channel while crossing the extension direction, and connecting the first channel and the second channel. A cross sectional area of each of the plurality of communicating passages is larger than a cross sectional area of the first channel and the second channel. Otherwise, surface roughness of inner wall surfaces of the plurality of communicating passages is smaller than surface roughness of inner wall surfaces of the first channel and the second channel.SELECTED DRAWING: Figure 6

Description

The present disclosure relates to high temperature parts and rotary machines.

For example, in a machine such as a gas turbine in which a high-temperature working gas flows inside, the parts constituting the machine include high-temperature parts that require cooling by a cooling medium. As a cooling structure for such a high-temperature component, it is known that the high-temperature component is cooled by circulating cooling air inside the component (see, for example, Patent Document 1).

JP-A-2017-160905

In a machine operated by a high-temperature working gas such as a gas turbine, in general, the removal of heat by cooling leads to a decrease in the thermal efficiency of the machine. Therefore, it is desirable to efficiently cool high-temperature parts with as few cooling media as possible. Therefore, it is desirable to increase the flow rate of the cooling medium in the cooling passage and improve the cooling capacity by reducing the cross-sectional area of the flow path in the cooling passage.
However, as the cross-sectional area of the flow path becomes smaller, the risk of the cooling passage being blocked by foreign matter or the like may increase.

At least one embodiment of the present disclosure is intended to suppress a decrease in cooling capacity due to blockage of a cooling passage in a high temperature component in view of the above circumstances.

(1) The high temperature parts according to at least one embodiment of the present disclosure are
A plurality of cooling passages including a linear first flow path and a second flow path provided in parallel with each other, and
A plurality of passages that are provided so as to intersect each other in the extending direction at different positions in the extending direction of the first flow path and the second flow path, and connect the first flow path and the second flow path. The connecting passage and
Equipped with
The cross-sectional area of each of the plurality of connecting passages is larger than the cross-sectional area of the first flow path and the second flow path, or
The surface roughness of the inner wall surface of the plurality of connecting passages is smaller than the surface roughness of the inner wall surface of the first flow path and the second flow path.

(2) The rotary machine according to at least one embodiment of the present disclosure includes high-temperature parts having the configuration of (1) above.

According to at least one embodiment of the present disclosure, it is possible to suppress a decrease in cooling capacity due to blockage of a cooling passage in a high temperature component.

It is a schematic diagram which shows the whole structure of a gas turbine as an example of a rotary machine. It is sectional drawing which shows the gas flow path of a gas turbine. It is a schematic plan view which saw one of the division bodies constituting the division ring which concerns on some Embodiments from the outside in the radial direction. It is a schematic side view which looked at the divided body which concerns on some Embodiments along the circumferential direction. FIG. 3 is a cross-sectional view taken along the line A5-A5 in FIG. It is a figure which showed schematically the structure of the cooling passage which concerns on one Embodiment. It is a figure which showed schematically the structure of the cooling passage which concerns on other embodiment. It is a figure which showed schematically the structure of the cooling passage which concerns on still another embodiment. It is a figure which showed schematically the structure of the cooling passage which concerns on still another embodiment. It is a figure which showed schematically the structure of the cooling passage which concerns on still another embodiment. It is a figure which showed schematically the structure of the cooling passage which concerns on still another embodiment. 11 is a cross-sectional view taken along the arrow A12-A12 in FIG.

Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present disclosure to this, and are merely explanatory examples. do not have.
For example, expressions that represent relative or absolute arrangements such as "in one direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" are exact. Not only does it represent such an arrangement, but it also represents a tolerance or a state of relative displacement at an angle or distance to the extent that the same function can be obtained.
For example, expressions such as "same", "equal", and "homogeneous" that indicate that things are in the same state not only represent exactly the same state, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the existing state.
For example, an expression representing a shape such as a square shape or a cylindrical shape not only represents a shape such as a square shape or a cylindrical shape in a geometrically strict sense, but also an uneven portion or a chamfering within a range where the same effect can be obtained. It shall also represent the shape including the part and the like.
On the other hand, the expressions "equipped", "equipped", "equipped", "included", or "have" one component are not exclusive expressions excluding the existence of other components.

In the following description, high temperature parts according to some embodiments will be described by taking high temperature parts used in a gas turbine as an example.
FIG. 1 is a schematic view showing an overall configuration of a gas turbine 10 as an example of a rotary machine. FIG. 2 is a cross-sectional view showing a gas flow path of the gas turbine 10.

In the present embodiment, as shown in FIG. 1, the gas turbine 10 is configured such that a compressor 11, a combustor 12, and a turbine 13 are arranged coaxially by a rotor 14, and a generator 15 is provided at one end of the rotor 14. It is connected. In the following description, the direction in which the axis of the rotor 14 extends is the axial Da, the circumferential direction around the axis of the rotor 14 is the circumferential Dc, and the direction perpendicular to the axis Ax of the rotor 14 is the radial direction. Let it be Dr.

The compressor 11 generates high-temperature and high-pressure compressed air AC by passing the air AI taken in from the air intake through a plurality of stationary blades and moving blades and compressing the air AI. The combustor 12 supplies a predetermined fuel FL to the compressed air AC and burns the compressed air AC to generate a high-temperature and high-pressure combustion gas FG. The turbine 13 drives and rotates the rotor 14 by passing the high-temperature and high-pressure combustion gas FG generated by the combustor 12 through a plurality of stationary blades and moving blades, and drives the generator 15 connected to the rotor 14. do.

Further, as shown in FIG. 2, in the turbine 13, the turbine still blade (static blade) 21 is configured such that the hub side of the airfoil portion 23 is fixed to the inner shroud 25 and the tip side is fixed to the outer shroud 27. There is. The turbine blade (moving blade) 41 is configured such that the base end portion of the airfoil portion 43 is fixed to the platform 45. Then, the outer shroud 27 and the split ring 50 arranged on the tip end side of the rotor blade 41 are supported by the casing (turbine casing) 30 via the heat shield ring 35, and the inner shroud 25 is supported by the support ring 31. Has been done. Therefore, the combustion gas flow path 32 through which the combustion gas FG passes is formed along the axial direction Da as a space surrounded by the inner shroud 25, the outer shroud 27, the platform 45, and the dividing ring 50.

The inner shroud 25, the outer shroud 27, and the split ring 50 function as gas path surface forming members. The gas path surface forming member has a gas path surface that partitions the combustion gas flow path 32 and is in contact with the combustion gas FG.

The combustor 12, the rotor blade 41 (for example, platform 45), the stationary blade 21 (for example, the inner shroud 25 and the outer shroud 27), the split ring 50, and the like are high-temperature components used in a high-temperature environment in which the combustion gas FG comes into contact. Requires cooling with a cooling medium. In the following description, as an example of the cooling structure of the high temperature component, the cooling structure of the divided ring 50 of the gas turbine 10 in which a plurality of divided bodies 51 are arranged in an annular shape along the circumferential direction Dc will be described.

FIG. 3 is a schematic plan view of one of the divided bodies 51 constituting the divided ring 50 according to some embodiments as viewed from the outside of the radial Dr. FIG. 4 is a schematic side view of the divided body 51 according to some embodiments as viewed along the circumferential direction Dc. FIG. 5 is a cross-sectional view taken along the line A5-A5 in FIG. In FIGS. 3 to 5, the structure of the divided body 51 is simplified and drawn. Therefore, for example, in FIGS. 3 and 5, the description of the hook or the like for attaching the split body 51 to the heat shield ring 35 is omitted.

The split ring 50 according to some embodiments is composed of a plurality of split bodies 51 arranged in a ring shape in the circumferential direction Dc. The main component of each divided body 51 is a main body 52 having a cooling flow path formed therein. As shown in FIG. 2, the divided body 51 is arranged so that the inner surface 52a of the radial Dr faces the combustion gas flow path 32 through which the combustion gas FG flows. A rotor blade 41 that rotates around the rotor 14 is arranged inside the radial Dr of the split body 51 with a constant gap. In order to prevent thermal damage due to the high temperature combustion gas FG, a plurality of axial passages (cooling passages) 60 extending in the axial direction Da are formed in the divided body 51.
A plurality of cooling passages 60 are arranged in parallel in the circumferential direction Dc.

Although not shown, in the gas turbine 10 according to one embodiment, the cooling air CA is supplied from the outer surface 52b side to each of the divided bodies 51 according to some embodiments. The cooling air CA supplied to the divided body 51 flows through the cooling passage 60 and is discharged into the combustion gas FG to convection-cool the main body 52 of the divided body 51.

(Outline of cooling passage 60)
Hereinafter, the cooling passage 60 according to some embodiments will be described.
In each of the cooling passages 60 according to some embodiments, the upstream end 60a is connected to the cooling air manifold 55. In each of the cooling passages 60 according to some embodiments, the downstream end 60b opens into the combustion gas FG at the downstream end 53 of the axial Da in the split body 51.
Each of the cooling passages 60 according to some embodiments is connected to other cooling passages 60 adjacent to each other in the circumferential direction Dc by a plurality of connecting passages 80, as will be described in detail later.

The cooling air CA supplied from the outside of the divided body 51 to the divided body 51 is supplied to the cooling air manifold 55 and then distributed from the cooling air manifold 55 to each cooling passage 60. The cooling air CA distributed to each cooling passage 60 flows through each cooling passage 60 toward the downstream side of Da in the axial direction, and is discharged from the downstream end 60b to the outside of the divided body 51.

The cooling air CA introduced from the cooling air manifold 55 into each cooling passage 60 cools the main body 52 by taking heat from the main body 52 in the process of flowing toward the downstream side in the axial direction Da.
In a machine operated by a high temperature working gas such as a gas turbine or a rocket engine, excessive cooling generally causes a decrease in the thermal efficiency of the machine. Therefore, it is desired that the cooling capacity is not insufficient while suppressing excessive cooling. Therefore, even in the divided body 51 according to some embodiments, it is desirable to increase the flow rate of the cooling air CA in the cooling passage 60 and improve the cooling capacity by reducing the flow path cross-sectional area in the cooling passage 60. ..
However, as the cross-sectional area of the flow path becomes smaller, the risk of the cooling passage 60 being blocked by foreign matter or the like may increase.

Therefore, in some embodiments, the cooling structure of the divided body 51 is configured as described below to suppress a decrease in the cooling capacity due to the blockage of the cooling passage 60.
FIG. 6 is a diagram schematically showing the configuration of the cooling passage 60 according to the embodiment, and is an enlarged view of a part of the cross section taken along the arrow A5-A5 in FIG. Note that FIG. 6 illustrates only two cooling passages 60 adjacent to each other in the circumferential direction Dc and a connecting passage 80 connecting the two cooling passages 60 for convenience of explanation.
FIG. 7 is a diagram schematically showing the configuration of the cooling passage 60 according to another embodiment, and corresponds to an enlarged view of a part of the cross section taken along the arrow A5-A5 in FIG.
FIG. 8 is a diagram schematically showing the configuration of the cooling passage 60 according to still another embodiment, and corresponds to an enlarged view of a part of the cross section taken along the arrow A5-A5 in FIG.
FIG. 9 is a diagram schematically showing the configuration of the cooling passage 60 according to still another embodiment, and corresponds to an enlarged view of a part of the cross section taken along the arrow A5-A5 in FIG.
FIG. 10 is a diagram schematically showing the configuration of the cooling passage 60 according to still another embodiment, and corresponds to an enlarged view of a part of the cross section taken along the arrow A5-A5 in FIG.
FIG. 11 is a diagram schematically showing the configuration of the cooling passage 60 according to still another embodiment, and a part of the cross section at the position outside the radial Dr from the cross section seen by the arrow A5-A5 in FIG. 3 is enlarged. Corresponds to the figure shown.
FIG. 12 is a cross-sectional view taken along the line A12-A12 in FIG.

For convenience of explanation, in FIGS. 6 to 10, one of the two cooling passages 60 adjacent to each other in the circumferential direction Dc is referred to as a first flow path 61, and the other is referred to as a second flow path 62. Further, in FIGS. 11 and 12, of the three cooling passages 60 arranged adjacent to each other in the circumferential direction Dc, the cooling passage 60 on one side of the circumferential direction Dc is referred to as a first flow path 61, and the circumferential direction Dc. The cooling passage 60 on the other side of the above is referred to as a second flow path 62, and the cooling passage 60 arranged between the first flow path 61 and the second flow path 62 is referred to as a third flow path 63.

As shown in FIGS. 6 to 12, the divided body 51 according to some embodiments includes a plurality of cooling passages 60 including linear first flow paths 61 and second flow paths 62 provided in parallel with each other. ing. As shown in FIGS. 6 to 12, the divided bodies 51 according to some embodiments have axes at different positions in the extending direction (axial direction Da) of the first flow path 61 and the second flow path 62. It is provided so as to intersect the direction Da and includes a plurality of connecting passages 80 connecting the first flow path 61 and the second flow path 62.
Therefore, even if a blocked portion occurs in the first flow path 61 or the second flow path 62, the cooling air CA can be circulated by bypassing the blocked portion via any of the plurality of connecting passages 80. As a result, it is possible to suppress a decrease in cooling capacity due to the blockage of the cooling passage 60.

In the divided body 51 according to some embodiments shown in FIGS. 6 to 12, the cross-sectional area Sa of each of the plurality of connecting passages 80 is based on the cross-sectional area Sc of the first flow path 61 and the second flow path 62. Should also be large. Alternatively, in the divided body 51 according to some embodiments shown in FIGS. 6 to 12, the surface roughness Raa of the inner wall surface 80a of the plurality of connecting passages 80 is within the first flow path 61 and the second flow path 62. It is preferable that the surface roughness Rac of the wall surface 60d is smaller than that of Rac.

If the cross-sectional area Sa of each of the plurality of connecting passages 80 is larger than the cross-sectional area Sc of the first flow path 61 and the second flow path 62, the first flow path 61 and the second flow path 62 in the plurality of communication passages 80. It is less likely that foreign matter will be clogged. Therefore, when a blockage occurs in the first flow path 61 or the second flow path 62, it becomes easy to secure a detour route via the connecting passage 80.
Further, if the surface roughness Raa of the inner wall surface 80a of the plurality of connecting passages 80 is smaller than the surface roughness Rac of the inner wall surface 60d of the first flow path 61 and the second flow path 62, the first in the plurality of connecting passages 80. Foreign matter and the like are less likely to be clogged than the 1st flow path 61 and the 2nd flow path 62. Therefore, when a blockage occurs in the first flow path 61 or the second flow path 62, it becomes easy to secure a detour route via the connecting passage 80.

The surface roughness Raa of the inner wall surface 80a of the plurality of connecting passages 80 and the surface roughness Rac of the inner wall surface 60d of the first flow path 61 and the second flow path 62 are, for example, arithmetic mean roughness Ra.

For example, if the divided body 51 according to some embodiments is formed by three-dimensional laminated molding, the surface roughness Raa of the inner wall surface 80a of the plurality of connecting passages 80 can be first streamed by changing the molding conditions. The surface roughness Rac of the inner wall surface 60d of the path 61 and the second flow path 62 may be smaller than the surface roughness Rac.
The modeling conditions in the three-dimensional laminated modeling are, for example, the stacking height per pass, the output of the energy beam, the scanning speed of the energy beam, and the like.

For example, as shown in FIG. 6, in the divided body 51 according to some embodiments, the plurality of connecting passages 80 have the plurality of cooling passages 60 from one end side (upstream side of Da in the axial direction) to the other end side (axial direction). It is preferable to include at least one first diagonal flow path 81 branching from the first flow path 61 so as to form an acute angle with respect to the reference direction (axial direction Da) toward the downstream side of Da). The plurality of connecting passages 80 may include at least one second oblique flow path 82 that branches from the second flow path 62 so as to form an acute angle with respect to the axial Da.
That is, in the embodiment shown in FIG. 6, it is preferable that the branch angle θ1 at which the first diagonal flow path 81 branches from the first flow path 61 is an acute angle, and the second diagonal flow path 82 branches from the second flow path 62. It is preferable that the branch angle θ2 is an acute angle.

When the branch angle θ1 at which the first diagonal flow path 81 branches from the first flow path 61 is an acute angle, the axial Da position of one end of the first diagonal flow path 81 connected to the first diagonal flow path 61 is the first. The position is located upstream of the axial Da position at the other end of the first oblique flow path 81 connected to the two flow paths 62. In some embodiments, the cooling air CA flows from the upstream side of the axial Da to the downstream side, so that the branch angle θ1 at which the first oblique flow path 81 branches from the first flow path 61 is an acute angle. One end of the first diagonal flow path 81 connected to the first flow path 61 is located upstream of the other end of the first diagonal flow path 81 connected to the second flow path 62 with respect to the flow of the cooling air CA. It will be.
Therefore, the cooling air CA flowing through the first flow path 61 can easily flow through the first diagonal flow path 81.

Similarly, when the branch angle θ2 at which the second diagonal flow path 82 branches from the second flow path 62 is an acute angle, the axial Da position of one end of the second diagonal flow path 82 connected to the second flow path 62 Is located upstream of the axial Da position at the other end of the second diagonal flow path 82 connected to the first flow path 61. Therefore, when the branch angle θ2 at which the second diagonal flow path 82 branches from the second flow path 62 is an acute angle, one end of the second diagonal flow path 82 connected to the second flow path 62 is the first flow path. It is located upstream of the other end of the second oblique flow path 82 connected to 61 with respect to the flow of the cooling air CA.
Therefore, the cooling air CA flowing through the second flow path 62 can easily flow through the second diagonal flow path 82.

For example, as shown in FIG. 6, in the divided body 51 according to some embodiments, a plurality of first diagonal flow paths 81 and a plurality of second diagonal flow paths 82 are alternately arranged in the axial direction Da. May be good.
As a result, even if a blockage occurs in the first flow path 61, the cooling air CA flowing through the first flow path 61 is on the axial Da upstream side of the first flow path 61 and is blocked. It can flow into the second flow path 62 by mainly flowing through the first diagonal flow path 81 connected to the position closest to the location. Further, a part of the cooling air CA flowing through the second flow path 62 is connected to the second flow path 62 on the downstream side of Da in the axial direction from the connection position with the first diagonal flow path 81 in the second flow path 62. It flows into the first flow path 61 through the second diagonal flow path 82. As a result, it is possible to suppress the range in which the cooling air CA does not flow due to the blockage in the first flow path 61.

Similarly, even if a blockage occurs in the second flow path 62, the cooling air CA flowing through the second flow path 62 is on the axial Da upstream side of the second flow path 62 and is blocked. It can flow into the first flow path 61 by mainly flowing through the second diagonal flow path 82 connected to the position closest to the location. Further, a part of the cooling air CA flowing through the first flow path 61 is connected to the first flow path 61 on the downstream side of Da in the axial direction from the connection position with the second diagonal flow path 82 in the first flow path 61. It flows into the second flow path 62 through the first diagonal flow path 81. As a result, it is possible to suppress the range in which the cooling medium does not flow due to blockage in the second flow path 62.

The plurality of first diagonal flow paths 81 may branch from the first flow path 61 at a branch angle θ1 of 35 degrees or more and 55 degrees or less with respect to the reference direction. The plurality of second diagonal flow paths 82 may branch from the second flow path 62 at a branch angle θ2 of 35 degrees or more and 55 degrees or less with respect to the reference direction.
As a result, when the divided body 51 according to some embodiments is formed by three-dimensional laminating molding, the laminating direction is set to the same direction as the reference direction (axial direction Da), so that the first diagonal flow path 81 and the first diagonal flow path 81 and the first 2 Even if the portion constituting the diagonal flow path 82 becomes an overhang region, it is not necessary to form a support. Therefore, the support formed at the time of modeling the divided body 51 can be reduced, the time required for the laminated modeling can be shortened, and the process of removing the support can be simplified.

For example, as shown in FIGS. 8 and 10, only the above-mentioned first oblique flow path 81 is provided between the first flow path 61 and the second flow path 62, or is not shown. However, even if only the above-mentioned second diagonal flow path 82 is provided between the first flow path 61 and the second flow path 62, the plurality of first diagonal flow paths 81 may be described above. It is preferable to branch from the first flow path 61 at a branch angle θ1 (see FIG. 6) of 35 degrees or more and 55 degrees or less with respect to the reference direction, and the plurality of second diagonal flow paths 82 may be 35 degrees or more with respect to the reference direction. It is preferable to branch from the second flow path 62 at a branch angle θ2 (see FIG. 6) of 55 degrees or less.
As a result, as described above, the support formed at the time of modeling the split body 51 can be reduced, the time required for the laminated modeling can be shortened, and the process of removing the support can be simplified.

For example, as shown in FIGS. 6, 8 and 10, in the divided body 51 according to some embodiments, the plurality of connecting passages 80 have a reference direction from the upstream side of the axial Da to the downstream side of the axial Da. It is preferable to include an oblique flow path 80A (first oblique flow path 81 or second oblique flow path 82) branching from one of the first flow path 61 or the second flow path 62 so as to form an acute angle with respect to the first flow path 61. .. Then, the oblique flow path 80A may be opened in the recess 70 provided in the flow path wall 60W of the one flow path.

In the region where the recess 70 is provided in the first flow path 61 or the second flow path 62, the flow path area increases as compared with the region where the recess 70 is not provided, so that the flow velocity of the cooling air CA decreases. Static pressure increases. As shown in FIGS. 6, 8 and 10, if the oblique flow path 80A opens in the recess 70, the cooling air CA flows into the oblique flow path 80A under the influence of the increased static pressure as described above. It will be easier.

For example, as shown in FIGS. 7, 9, 11 and 12, in the divided body 51 according to some embodiments, the plurality of connecting passages 80 are relative to the first flow path 61 and the second flow path 62. It may include an orthogonal flow path 80B connected so as to be orthogonal to each other.
As a result, the pressure loss when the cooling air CA flows from the first flow path 61 to the second flow path 62 via the communication passage 80 (orthogonal flow path 80B) and the communication passage 80 (orthogonal flow) from the second flow path 62. The pressure loss when the cooling air CA flows through the first flow path 61 via the passage 80B) is equivalent to that. Therefore, the possibility of blockage in the first flow path 61 is the same regardless of the extension direction position of the first flow path 61, and the possibility of blockage in the second flow path 62 is the extension direction of the second flow path 62. It is equivalent regardless of the position, and when the possibility of blockage in the first flow path 61 and the possibility of blockage in the second flow path 62 are equivalent, the range in which the cooling air CA does not flow due to the blockage is effective. Can be suppressed.

For example, as shown in FIGS. 9 and 10, in the divided body 51 according to some embodiments, a plurality of protrusions 91 are formed in at least one of the first flow path 61 and the second flow path 62. It may have an inner wall surface 60d.
As a result, the flow of the cooling air CA is disturbed by the plurality of protrusions 91, so that the cooling capacity can be improved.

For example, in the embodiment shown in FIG. 9, the first flow path 61 and the second flow path 62 have an inner wall surface 60d on which a plurality of protrusions 91 are formed. The plurality of connecting passages 80 include an orthogonal flow path 80B connected so as to be orthogonal to the first flow path 61 and the second flow path 62.
As a result, the flow of the cooling air CA is disturbed by the plurality of protrusions 91, so that the cooling capacity in the first flow path 61 and the second flow path 62 can be improved. Further, by not providing the protrusion 91 in the plurality of connecting passages 80 (orthogonal flow paths 80B), smoothness in the plurality of connecting passages 80 (orthogonal flow paths 80B) is ensured and foreign matter and the like are less likely to be clogged. Therefore, it is possible to suppress the range in which the cooling air CA does not flow due to the blockage.

For example, in the embodiment shown in FIG. 10, the plurality of connecting passages 80 branch from the first flow path 61 so as to form an acute angle with respect to the reference direction from the upstream side of the axial Da to the downstream side of the axial Da. Includes road 80A (first diagonal flow path 81). The diagonal flow path 80A (first diagonal flow path 81) opens in a recess 70 provided in the flow path wall 60W of the first flow path 61. The second flow path 62 has an inner wall surface 60d on which a plurality of protrusions 91 are formed.

In the embodiment shown in FIG. 10, since the first oblique flow path 81 branches from the first flow path 61 so as to form an acute angle with respect to the reference direction, the cooling air CA flowing through the first flow path 61 is the first. It becomes easy to flow through the oblique flow path 81. Further, in the embodiment shown in FIG. 10, in the region where the recess 70 is provided in the first flow path 61, the flow path area is increased as compared with the region where the recess 70 is not provided, so that the flow velocity of the cooling air CA is increased. It decreases and the static pressure increases. In the embodiment shown in FIG. 10, since the first oblique flow path 81 opens in the recess 70, the cooling air CA flowing through the first oblique flow path 61 is affected by the increased static pressure as described above and is the first oblique flow path. It becomes easier to flow through the flow path 81.
In the embodiment shown in FIG. 10, since the flow of the cooling air CA is disturbed by the plurality of protrusions 91, the cooling capacity in the second flow path 62 can be improved. However, by providing the plurality of protrusions 91, the risk of blockage in the second flow path 62 is higher than the risk of blockage in the first flow path 61.

Here, a case where a blockage portion occurs in the second flow path 62, which has a higher risk of blockage than the first flow path 61, will be examined. When a blockage occurs in the second flow path 62, the cooling air CA flowing through the second flow path 62 is connected to a position on the upstream side of the second flow path 62 and closest to the blockage. It can flow into the first flow path 61 by mainly flowing through the first diagonal flow path 81. Further, a part of the cooling air CA flowing through the first flow path 61 is connected to the first flow path 61 on the downstream side of the connection position with the first diagonal flow path 81 in the first flow path 61. It flows into the second flow path 62 via the first diagonal flow path 81. At that time, in the embodiment shown in FIG. 10, as described above, the cooling air CA flowing through the first flow path 61 easily flows through the first diagonal flow path 81. Therefore, in the embodiment shown in FIG. 10, even if a blockage occurs in the second flow path 62, which has a higher risk of blockage than the first flow path 61, the cooling air CA promptly turns the block after bypassing the blockage. It will flow into the two flow paths 62. As a result, when the risk of blockage in the second flow path 62 is higher than the risk of blockage in the first flow path 61, it is possible to suppress the range in which the cooling air CA does not flow due to blockage in the second flow path 62.

For example, in the embodiment shown in FIG. 11, at least one cooling passage 60 (third flow path 63) is provided between the first flow path 61 and the second flow path 62. The plurality of connecting passages 80 are not connected to the at least one cooling passage 60 (third flow path 63), but connect the first flow path 61 and the second flow path 62.
Specifically, in the embodiment shown in FIG. 11, the plurality of connecting passages 80 extend along the circumferential direction Dc at positions deviated from the third flow path 63 in the radial direction Dr. That is, in the embodiment shown in FIG. 11, the plurality of connecting passages 80 connect the first flow path 61 and the second flow path 62 so as to straddle the third flow path 63.
As a result, for example, the flow direction of the cooling air CA in the first flow path 61 and the second flow path 62 is different from the flow direction of the cooling air CA in the at least one cooling passage 60 (third flow path 63). However, the first flow path 61 and the second flow path 62 can be connected by a plurality of connecting passages 80.

(Three-dimensional laminated model)
The divided body 51 according to some embodiments may be a three-dimensional laminated model formed by three-dimensional laminated modeling.
For example, even if it is attempted to form each passage in the divided body 51 according to some embodiments by electric discharge machining, it is difficult to form a plurality of connecting passages 80 after forming a plurality of cooling passages 60. If the divided body 51 according to some embodiments is formed by three-dimensional laminated modeling, even the divided body 51, which is difficult to process by electric discharge machining, can be obtained as a three-dimensional laminated model.

The present disclosure is not limited to the above-described embodiment, and includes a modified form of the above-mentioned embodiment and a form in which these forms are appropriately combined.

The contents described in each of the above embodiments are grasped as follows, for example.
(1) The high-temperature component according to at least one embodiment of the present disclosure includes a plurality of cooling passages 60 including linear first flow paths 61 and second flow paths 62 provided in parallel with each other, the first flow path 61, and the like. A plurality of connecting passages 80, which are provided at different positions in the extending direction of the second flow path 62 so as to intersect each other in the extending direction and connect the first flow path 61 and the second flow path 62, are provided. Be prepared. The cross-sectional area Sa of each of the plurality of connecting passages 80 is larger than the cross-sectional area Sc of the first flow path 61 and the second flow path 62. Alternatively, the surface roughness Raa of the inner wall surface 80a of the plurality of connecting passages 80 is smaller than the surface roughness Rac of the inner wall surface 60d of the first flow path 61 and the second flow path 62.

According to the configuration of (1) above, since a plurality of connecting passages 80 connecting the first flow path 61 and the second flow path 62 are provided, blockage points occur in the first flow path 61 and the second flow path 62. However, the cooling medium can be circulated by bypassing the blocked portion via any of the plurality of connecting passages 80. As a result, it is possible to suppress a decrease in cooling capacity due to the blockage of the cooling passage 60.
Further, according to the configuration of (1) above, if the cross-sectional area Sa of each of the plurality of connecting passages 80 is larger than the cross-sectional area Sc of the first flow path 61 and the second flow path 62, the plurality of connecting passages 80 will be used. , Foreign matter and the like are less likely to be clogged than the first flow path 61 and the second flow path 62. Therefore, when a blockage occurs in the first flow path 61 or the second flow path 62, it becomes easy to secure a detour route via the connecting passage 80.
According to the configuration of (1) above, if the surface roughness Raa of the inner wall surface 80a of the plurality of connecting passages 80 is smaller than the surface roughness Rac of the inner wall surface 60d of the first flow path 61 and the second flow path 62, In the plurality of connecting passages 80, foreign matter and the like are less likely to be clogged than in the first flow path 61 and the second flow path 62. Therefore, when a blockage occurs in the first flow path 61 or the second flow path 62, it becomes easy to secure a detour route via the connecting passage 80.

(2) In some embodiments, in the configuration of (1) above, the plurality of connecting passages 80 have one end side (axial Da upstream side) to the other end side (axial Da downstream side) of the plurality of cooling passages 60. ) Includes at least one first diagonal flow path 81 that branches from the first flow path 61 so as to form an acute angle with respect to the reference direction (axial direction Da). The plurality of connecting passages 80 include at least one second oblique flow path 82 that branches from the second flow path 62 so as to form an acute angle with respect to the reference direction.

According to the configuration of (2) above, since the first oblique flow path 81 branches from the first flow path 61 so as to form an acute angle with respect to the reference direction, the cooling medium flowing through the first flow path 61 is the first. 1 It becomes easy to flow through the diagonal flow path 81.
According to the configuration of (2) above, since the second oblique flow path 82 branches from the second flow path 62 so as to form an acute angle with respect to the reference direction, the cooling medium flowing through the second flow path 62 is the second. It becomes easy to flow through the oblique flow path 82.

(3) In some embodiments, in the configuration of (2) above, the plurality of first diagonal flow paths 81 and the plurality of second diagonal flow paths 82 are alternately arranged in the extension direction.

According to the configuration of (3) above, even if a blocked portion occurs in the first flow path 61, the cooling medium flowing through the first flow path 61 is on the upstream side of the first flow path 61 with respect to the blocked portion. It can flow into the second flow path 62 by mainly flowing through the first diagonal flow path 81 connected to the position closest to the closed portion. Further, a part of the cooling medium flowing through the second flow path 62 is connected to the second flow path 62 on the downstream side of the connection position with the first diagonal flow path 81 in the second flow path 62. 2 It flows into the first flow path 61 through the diagonal flow path 82. As a result, it is possible to suppress the range in which the cooling medium does not flow due to blockage in the first flow path 61.
Further, according to the configuration of (3) above, even if a blocked portion occurs in the second flow path 62, the cooling medium flowing through the second flow path 62 is on the upstream side of the second flow path 62 with respect to the blocked portion. Therefore, it can flow into the first flow path 61 by mainly flowing through the second diagonal flow path 82 connected to the position closest to the closed portion. Further, a part of the cooling medium flowing through the first flow path 61 is connected to the first flow path 61 on the downstream side of the connection position with the second diagonal flow path 82 in the first flow path 61. It flows into the second flow path 62 through the diagonal flow path 81. As a result, it is possible to suppress the range in which the cooling medium does not flow due to blockage in the second flow path 62.

(4) In some embodiments, in the configuration of (2) or (3), the plurality of first diagonal flow paths 81 have a branch angle θ1 of 35 degrees or more and 55 degrees or less with respect to the reference direction. 1 Branches from the flow path 61. The plurality of second diagonal flow paths 82 branch from the second flow path 62 at a branch angle θ2 of 35 degrees or more and 55 degrees or less with respect to the reference direction.

According to the configuration of (4) above, for example, when a high-temperature component is formed by three-dimensional laminated molding, the stacking direction is set to the same direction as the reference direction, so that the first diagonal flow path 81 and the second diagonal flow path 82 are formed. Even if the part that constitutes the overhang area becomes an overhang area, there is no need to form a support. Therefore, it is possible to reduce the number of supports formed during the molding of high-temperature parts, shorten the time required for laminated molding, and simplify the process of removing the supports.

(5) In some embodiments, in the configuration of (1) above, the plurality of connecting passages 80 have one end side (axial Da upstream side) to the other end side (axial Da downstream side) of the plurality of cooling passages 60. ) Includes an oblique flow path 80A that branches from either the first flow path 61 or the second flow path 62 so as to form an acute angle with respect to the reference direction (axial direction Da). The diagonal flow path 80A opens in the recess 70 provided in the flow path wall 60W of the above-mentioned one flow path of the first flow path 61 or the second flow path 62.

According to the configuration of (5) above, in the region where the recess 70 is provided in the first flow path 61 or the second flow path 62, the flow path area is increased as compared with the region where the recess 70 is not provided. , The flow velocity of the cooling medium decreases and the static pressure increases. According to the configuration of (5) above, since the oblique flow path 80A opens in the recess 70, the cooling medium is likely to flow into the oblique flow path 80A under the influence of the increased static pressure as described above.

(6) In some embodiments, in the configuration of (5) above, the oblique flow path 80A is the first flow path 61 or the second flow path at a branch angle of 35 degrees or more and 55 degrees or less with respect to the reference direction. Branch from one of 62.

According to the configuration of (6) above, for example, when a high-temperature component is formed by three-dimensional laminating molding, the laminating direction is set to the same direction as the reference direction, so that the portion constituting the oblique flow path 80A becomes an overhang region. Even so, there is no need to form a support. Therefore, it is possible to reduce the number of supports formed during the molding of high-temperature parts, shorten the time required for laminated molding, and simplify the process of removing the supports.

(7) In some embodiments, in the configuration of (1) above, the plurality of connecting passages 80 are connected so as to be orthogonal to the first flow path 61 and the second flow path 62. including.

According to the configuration of (7) above, the pressure loss when the cooling medium flows from the first flow path 61 to the second flow path 62 via the connecting passage 80 (orthogonal flow path 80B) and from the second flow path 62. The pressure loss when the cooling medium flows through the first flow path 61 via the connecting passage 80 (orthogonal flow path 80B) is equivalent. Therefore, the possibility of blockage in the first flow path 61 is the same regardless of the extension direction position of the first flow path 61, and the possibility of blockage in the second flow path 62 is the extension direction of the second flow path 62. It is equivalent regardless of the position, and when the possibility of blockage in the first flow path 61 and the possibility of blockage in the second flow path 62 are equivalent, the range in which the cooling medium does not flow due to the blockage is effective. Can be suppressed.

(8) In some embodiments, in any of the configurations (1) to (7) above, at least one of the first flow path 61 and the second flow path 62 is formed with a plurality of protrusions 91. It has 60d of the inner wall surface.

According to the configuration of (8) above, the flow of the cooling medium is disturbed by the plurality of protrusions 91, so that the cooling capacity can be improved.

(9) In some embodiments, in the configuration of (8) above, the first flow path 61 and the second flow path 62 have an inner wall surface 60d on which a plurality of protrusions 91 are formed. The plurality of connecting passages 80 include an orthogonal flow path 80B connected so as to be orthogonal to the first flow path 61 and the second flow path 62.

According to the configuration of (9) above, since the flow of the cooling medium is disturbed by the plurality of protrusions 91, the cooling capacity in the first flow path 61 and the second flow path 62 can be improved. Further, by not providing the protrusion 91 in the plurality of connecting passages 80 (orthogonal flow paths 80B), smoothness in the plurality of connecting passages 80 (orthogonal flow paths 80B) is ensured and foreign matter and the like are less likely to be clogged. Therefore, it is possible to suppress the range in which the cooling medium does not flow due to blockage.

(10) In some embodiments, in the configuration of (1) above, the plurality of connecting passages 80 have one end side (axial Da upstream side) to the other end side (axial Da downstream side) of the plurality of cooling passages 60. ) Includes an oblique flow path 80A (first diagonal flow path 81) that branches from the first flow path 61 so as to form an acute angle with respect to the reference direction (axial direction Da). The diagonal flow path 80A (first diagonal flow path 81) opens in the recess 70 provided in the flow path wall 60W of the first flow path 61. The second flow path 62 has an inner wall surface 60d on which a plurality of protrusions 91 are formed.

According to the configuration of (10) above, the diagonal flow path 80A (first diagonal flow path 81) branches from the first flow path 61 so as to form an acute angle with respect to the reference direction. The circulating cooling medium easily flows through the oblique flow path 80A (first diagonal flow path 81). Further, according to the configuration of (10) above, in the region where the recess 70 is provided in the first flow path 61, the flow path area is increased as compared with the region where the recess 70 is not provided, so that the flow velocity of the cooling medium is increased. Decreases and static pressure increases. According to the configuration of (10) above, since the diagonal flow path 80A (first diagonal flow path 81) opens in the recess 70, it flows through the first flow path 61 under the influence of the increased static pressure as described above. The cooling medium is easy to flow in the diagonal flow path.
According to the configuration of (10) above, since the flow of the cooling medium is disturbed by the plurality of protrusions 91, the cooling capacity in the second flow path 62 can be improved. However, by providing the plurality of protrusions 91, the risk of blockage in the second flow path 62 is higher than the risk of blockage in the first flow path 61.

Here, a case where a blockage portion occurs in the second flow path 62, which has a higher risk of blockage than the first flow path 61, will be examined. When a blockage occurs in the second flow path 62, the cooling medium flowing through the second flow path 62 is connected to a position on the upstream side of the second flow path 62 and closest to the blockage. It can flow into the first flow path 61 by mainly flowing through the diagonal flow path 80A (first diagonal flow path 81). Further, a part of the cooling medium flowing through the first flow path 61 is located downstream of the connection position with the diagonal flow path 80A (first diagonal flow path 81) in the first flow path 61, and is the first flow path 61. It flows into the second flow path 62 through the diagonal flow path 80A (first diagonal flow path 81) connected to the second flow path 62. At that time, in the configuration of the above (10), as described above, the cooling medium flowing through the first flow path 61 easily flows through the diagonal flow path 80A (first diagonal flow path 81). Therefore, according to the configuration of (10) above, even if a blockage occurs in the second flow path 62, which has a higher risk of blockage than the first flow path 61, the cooling medium promptly bypasses the blockage. It will flow into the second flow path 62. As a result, when the risk of blockage in the second flow path 62 is higher than the risk of blockage in the first flow path 61, it is possible to suppress the range in which the cooling medium does not flow due to blockage in the second flow path 62.

(11) In some embodiments, in any of the configurations (1) to (10) above, at least one cooling passage 60 (third flow) between the first flow path 61 and the second flow path 62. Road 63) is provided. The plurality of connecting passages 80 are not connected to the at least one cooling passage 60 (third flow path 63), but connect the first flow path 61 and the second flow path 62.

According to the configuration of the above (11), for example, the flow direction of the cooling medium in the first flow path 61 and the second flow path 62 and the distribution of the cooling medium in the at least one cooling passage 60 (third flow path 63). Even if the directions are different, the first flow path 61 and the second flow path 62 can be connected by a plurality of connecting passages 80.

(12) In some embodiments, in any of the configurations (1) to (11) above, the high temperature component comprises a split ring 50 of the gas turbine 10 formed annularly along the circumferential direction. Body 51.

According to the configuration of the above (12), when the divided body 51 has the configuration of any one of the above (1) to (11), it is possible to suppress a decrease in the cooling capacity due to the blockage of the cooling passage 60.

(13) In some embodiments, in any of the configurations (1) to (12) above, the high temperature component (divided body 51) is a three-dimensional laminated model.

For example, even if it is attempted to form each passage in the high temperature component by electric discharge machining, it is difficult to form a plurality of connecting passages 80 after forming a plurality of cooling passages 60. According to the configuration (13) above, even a high-temperature component that is difficult to machine by electric discharge machining can be obtained as a three-dimensional laminated model.

(14) The rotary machine (gas turbine 10) according to at least one embodiment of the present disclosure includes high-temperature parts having any of the above configurations (1) to (13).

According to the configuration of (14) above, it is possible to suppress a decrease in the cooling capacity of the high temperature component of the rotary machine and improve the reliability of the rotary machine.

10 Gas turbine 50 Divided ring 51 Divided body 60 Cooling flow path 61 First flow path 62 Second flow path 63 Third flow path 70 Recessed 80 Connecting passage 80A Diagonal flow path 80B Orthogonal flow path 81 First diagonal flow path 82 Second Diagonal flow path 91 protrusion

Claims (14)

A plurality of cooling passages including a linear first flow path and a second flow path provided in parallel with each other, and
A plurality of passages that are provided so as to intersect each other in the extending direction at different positions in the extending direction of the first flow path and the second flow path, and connect the first flow path and the second flow path. The connecting passage and
Equipped with
The cross-sectional area of each of the plurality of connecting passages is larger than the cross-sectional area of the first flow path and the second flow path, or
A high-temperature component whose surface roughness of the inner wall surface of the plurality of connecting passages is smaller than the surface roughness of the inner wall surface of the first flow path and the second flow path. The plurality of communication passages
At least one first oblique flow path that branches from the first flow path so as to form an acute angle with respect to the reference direction from one end side to the other end side of the plurality of cooling passages.
The high temperature component according to claim 1, further comprising at least one second diagonal flow path branching from the second flow path so as to form an acute angle with respect to the reference direction. The high temperature component according to claim 2, wherein the plurality of the first oblique flow paths and the plurality of the second diagonal flow paths are alternately arranged in the extending direction. The plurality of first oblique flow paths branch from the first flow path at a branch angle of 35 degrees or more and 55 degrees or less with respect to the reference direction.
The plurality of second oblique flow paths branch from the second flow path at a branch angle of 35 degrees or more and 55 degrees or less with respect to the reference direction.
The high temperature component according to claim 2 or 3. The plurality of connecting passages are oblique flow paths that branch from one of the first flow path or the second flow path so as to form an acute angle with respect to a reference direction from one end side to the other end side of the plurality of cooling passages. Including
The high-temperature component according to claim 1, wherein the diagonal flow path opens in a recess provided in the flow path wall of the first flow path or the one of the second flow paths. The high-temperature component according to claim 5, wherein the diagonal flow path branches from either the first flow path or the second flow path at a branch angle of 35 degrees or more and 55 degrees or less with respect to the reference direction. The high temperature component according to claim 1, wherein the plurality of connecting passages include an orthogonal flow path connected so as to be orthogonal to the first flow path and the second flow path. The high-temperature component according to any one of claims 1 to 7, wherein at least one of the first flow path and the second flow path has an inner wall surface on which a plurality of protrusions are formed. The first flow path and the second flow path have an inner wall surface on which the plurality of protrusions are formed.
The high temperature component according to claim 8, wherein the plurality of connecting passages include an orthogonal flow path connected so as to be orthogonal to the first flow path and the second flow path. The plurality of connecting passages include an oblique flow path branching from the first flow path so as to form an acute angle with respect to a reference direction from one end side to the other end side of the plurality of cooling passages.
The diagonal flow path is opened in a recess provided in the flow path wall of the first flow path, and the diagonal flow path is opened.
The high-temperature component according to claim 1, wherein the second flow path has an inner wall surface on which a plurality of protrusions are formed. At least one cooling passage is provided between the first flow path and the second flow path.
The high-temperature component according to any one of claims 1 to 10, wherein the plurality of connecting passages are not connected to the at least one cooling passage and connect the first flow path and the second flow path. The high-temperature component according to any one of claims 1 to 11, wherein the high-temperature component is a split body constituting a split ring of a gas turbine formed in an annular shape along the circumferential direction. The high-temperature component according to any one of claims 1 to 12, wherein the high-temperature component is a three-dimensional laminated model. A rotary machine comprising the high temperature component according to any one of claims 1 to 13.

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