Plate-shaped structural component of a gas turbine

Abstract

A plate-shaped structural component of a gas turbine with a base body that, at least in one edge area, is provided in one piece with a side bar that is embodied to ne substantially rectangular to the surface of the base body, wherein the base body has a different thickness than the side bar, wherein a supporting body, which is connected in one piece with the base body and the side bar and is provided with a substantially triangular cross section, is arranged between the side bar and the base body, being provided with multiple slit-like recesses.

Claims

1. A plate-shaped structural component forming a gas turbine combustor shingle, comprising: a base body including at least one edge area; a side bar at the base body at the at least one edge area, wherein the side bar is perpendicular to a surface of the base body, and wherein the base body includes a different thickness than the side bar; and a supporting body arranged between the base body and the side bar; wherein the supporting body includes a triangular cross section; wherein the supporting body includes at least one recess, wherein at the at least one recess the supporting body includes a rectilinear wall course which transitions into a rounded-off wall course at each side of the at least one recess to form an ogival shape of the at least one recess; and a respective base cooling air hole penetrating the base body and arranged inside the at least one recess; and wherein the at least one recess includes a plurality of recesses.

2. The plate-shaped structural component according to claim 1, and further comprising a respective side cooling air hole extending from the at least one recess through the side bar.

3. The plate-shaped structural component according to claim 1, wherein the side cooling air hole includes a cross section that widens in a flow-through direction.

4. The plate-shaped structural component according to claim 3, wherein the cross section of the side cooling air hole conically widens.

5. The plate-shaped structural component according to claim 3, wherein a smallest cross section of the side cooling air hole is present in a least one chosen from at an entry into the side bar and adjacent to the entry into the side bar.

6. The plate-shaped structural component according to claim 1, wherein the at least one recess is symmetrical to a central plane of the base cooling air hole.

7. The plate-shaped structural component according to claim 1, wherein the rounded-off wall course includes a radius that is between 0.1 times to 2 times a width of the recess.

8. The plate-shaped structural component according to claim 7 wherein the rounded-off wall course includes a radius that is between 1 times to 2 times a width of the at least one recess.

9. The plate-shaped structural component according to claim 1, wherein the rounded-off wall course at each side of the at least one recess forms an angle at a top of the at least one recess of between 45 and 120.

10. The plate-shaped structural component according to claim 1, wherein a distance between adjacent recesses of the plurality of recesses along a longitudinal direction of the side bar is one chosen from greater than and equal to l30.5, wherein l3 is a width of a respective one of the plurality of recesses.

11. The plate-shaped structural component according to claim 1, wherein the supporting body includes an angle of between 30 and 60 with respect to the surface of the base body.

12. The plate-shaped structural component according to claim 11, wherein the supporting body includes an angle of 45 with respect to the surface of the base body.

13. The plate-shaped structural component according to claim 1, wherein a central axis of the base cooling air hole is one chosen from perpendicular and at an obtuse angle to the surface of the base body.

14. A plate-shaped structural component forming a gas turbine combustor shingle, comprising: a base body including at least one edge area; a side bar at the base body at the at least one edge area, wherein the side bar is perpendicular to a surface of the base body, and wherein the base body includes a different thickness than the side bar; and a supporting body arranged between the base body and the side bar; wherein the supporting body includes a triangular cross section; wherein the supporting body includes at least one recess, wherein at the at least one recess the supporting body includes a rectilinear wall course which transitions into a rounded-off wall course at each side of the at least one recess to form an ogival shape of the at least one recess; and a respective side cooling air hole extending from the at least one recess through the side bar; and wherein the at least one recess includes a plurality of recesses.

Description

(1) In the following, the invention is described based on the exemplary embodiment in connection with the drawing. Herein:

(2) FIG. 1 shows a schematic perspective partial view of a first exemplary embodiment of the invention,

(3) FIG. 2 shows a perspective side view according to FIG. 1,

(4) FIG. 3 shows a simplified top view according to FIG. 1 or 2,

(5) FIG. 4 shows a schematic top view of a second exemplary embodiment of the invention,

(6) FIG. 5 shows a schematic perspective side view of a third exemplary embodiment of the invention, and

(7) FIG. 6 shows a schematic perspective top view of a fourth exemplary embodiment of the invention.

(8) FIG. 1 shows, in a perspective rendering and in a partial view, a first exemplary embodiment of a plate-shaped structural component according to the invention, which is embodied in the form of a combustion chamber shingle of a gas turbine. The plate-shaped structural component has a base body 1 that is designed as an even plate. The base body 1 has a surface 6 that is facing away from a combustion chamber interior space of a gas turbine engine. Thus, the surface 6 represents the cold surface of the plate-shaped structural component (combustion chamber shingle).

(9) A plurality of effusion cooling holes is embodied in the base body 1, as it is known from the state of the art.

(10) The base body 1 has a thickness d1.

(11) At the edge area of the base body 1, a side bar 2 is embodied in one piece with the same, having a thickness d2. The thickness d1 is measured from the surface 6 of the base body 1 to its back side. The thickness d2 of the side bar 2 is defined in the same direction.

(12) The side bar 2, which is embodied in one piece with the base body 1 by means of an additive method, is supported by means of a supporting body 3. The latter has a substantially triangular cross section, as it follows from FIG. 2. Across its length, the supporting body is provided with a plurality of recesses 4. The areas of the supporting body 3 remaining between the recesses 4 are thus embodied in a bar-shaped or strip-shaped manner.

(13) At least one cooling air hole 5 is provided in every recess 4, extending from the recess 4 to the back side of the base body 1 analog the effusion cooling holes 10.

(14) The free surface of the supporting body 3 has an angle with respect to the surface 6 of the base body 1, which can be between 30 and 60. A value of 45 is preferable.

(15) FIG. 3 shows a top view onto the arrangement according to FIGS. 1 and 2. Here, it can be seen that the recess 4 has a width l3. The side walls of the recess 4, which are identified as l1 and l2 in FIG. 3, respectively have a rectilinear wall course 7 and transition into a rounded-off wall course 8, the radius of which is respectively indicated by r1 and r2 in FIG. 3. The two rounded-off wall courses 8 meet at an angle . It can be between 45 and 120.

(16) The length of the rectilinear wall courses 7 (l1 or l2) is preferably identical and 0 mm. The radiuses r1 and r2 are also identical and are 0.1 times to 2 times the width l3 of the recess 4.

(17) The rectilinear wall courses 7 with the lengths l1 and l2 as well as the rounded-off wall courses 8 with the radiuses r1 and r2 are not mandatory for the invention, also other wall courses can be realized for forming the recess 4. The lengths l1 and l2 as well as the radiuses r1 and r2 can differ from each other in the specified intervals. Also, it is not mandatory that the recess 4 is arranged symmetrically to a central plane of the cooling air hole 5.

(18) FIG. 3 shows the positioning of the cooling air hole 6 with its central axis 9. Accordingly, the structure of the recesses 4 and of the associated cooling air holes 5 is substantially symmetrical. The recesses 4 thus form a support structure that is defined by two rounded-off or arc-shaped wall areas between which the individual cooling air holes 5 are arranged.

(19) The manufacture of the structural component according to the invention by means of an additives method is usually carried out with a vertical orientation of the base body 1. If the latter is provided with a side bar at all sides, a side bar with the thickness d2 is constructed first. The transition to the base body 1 with a thickness d1 is realized in a continuous manner through the respective supporting body 3, which is provided with the recesses 4.

(20) It is to be understood that the structural component according to the invention can be provided with a side bar 2 at all its edges. Further, according to the invention, the plate-shaped base body 1 is not limited to an even plate, but can also be embodied so as to be curved or double-curved.

(21) FIG. 4 shows, in a schematic manner, a simplified top view of a slit-like recess according to a second embodiment of the invention. The second embodiment substantially corresponds to the first embodiment, wherein in addition respectively one additional cooling air hole 15 is provided. The additional cooling air hole 15 extends from the slit-like recess 4 through the side bar 2 of the plate-like structural component, opening into the outer side of the side bar. Here, a flow cross section of the additional cooling air hole in the side bar 2 preferably changes. As shown in FIG. 4, the additional cooling air hole 15 is configured as the diffusor, wherein the narrowest cross section is located at the entry into the side bar 2. The additional cooling air hole 15 is preferably formed in a linear manner. However, it is to be understood that the additional cooling air hole 15 can also have a curved shape in the flow direction. Thus, in addition the side bar 2 can also be cooled through the additional cooling air hole 15. At that, the diffusor design of the additional cooling air hole 15 reduces the velocity of the cooling air, whereby a cooling effect can be increased.

(22) FIG. 5 shows a fifth embodiment of the invention, which in contrast to the first embodiment has no cooling air holes 5 that are arranged at the slit-like recess 4. In this manner, an improved stability can be achieved in the area of the supporting body 3 and the side bar 2 of the combustion chamber shingle, which reduces the residual stress in the structural component, in particular if the shingle has an additive structure. By providing the plurality of slit-shaped recesses 4, it is still possible to achieve sufficient cooling of the supporting body 3 and the side bar 2.

(23) FIG. 6 shows a fourth embodiment of the invention. The fourth embodiment substantially corresponds to the second embodiment, but in contrast to the second embodiment no cooling air holes 5 through the base body 1 arranged at the base of the recess 4 are provided. Thus, the slit-shaped recess 4 is cooled only by the additional cooling air holes 15 that extend though the side bar 2. The additional cooling air hole 15 through the side bar 2 is embodied as a diffusor, just like in the second embodiment. However, it is to be understood that other geometrical shapes can also be provided for the additional cooling air hole 15, for example a constant cross section across the flow length of the additional cooling air hole 15.

PARTS LIST

(24) 1 base body 2 side bar 3 supporting body 4 recess 5 cooling air hole 6 surface 7 rectilinear course 8 rounded-off course 9 central axis 10 effusion cooling hole 15 additional cooling air hole in the side bar a distance between adjacent recesses d1 thickness of the base body d2 thickness of the side bar l1, l2 lengths of the linear wall shapes of the recess l3 width of the recess at the base of the supporting body r1, r2 radius of rounded wall shapes of the recess