Method for manufacturing an engine component with a cooling duct arrangement and engine component

Patent metadata

Field	Value
Publication number	US-11939889-B2
Application number	US-202017435953-A
Country	US
Kind code	B2
Filing date	Mar 3, 2020
Priority date	Mar 4, 2019
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

The present invention relates to a method for producing an engine component having a cooling duct arrangement which has a plurality of cooling ducts, each having an inflow opening, the inflow openings being arranged according to a predefined pattern in an inflow surface of the engine component, and each cooling duct opening into a recess in a wall of the engine component, along which wall a cooling film is to be formed. According to the invention, the pattern is formed in at least one subregion of defined size of the inflow surface, from a plurality of identical isosceles triangles, which are defined by a minimum spacing (k) and by a mean diameter (a) of the inflow openings correlating to the minimum spacing (k). This procedure reduces the complexity of the design process.

First claim

The invention claimed is:

1. A method for producing an engine component having a cooling duct arrangement, the method comprising:
providing a plurality of cooling ducts and a plurality of inflow openings, with each of the plurality of cooling ducts having one of the plurality of inflow openings, wherein the plurality of inflow openings are arranged according to a pattern on an inflow surface of the engine component, each of the plurality of cooling ducts flowing into a respective recess in a wall of the engine component, the plurality of cooling ducts configured to guide a cooling fluid onto the wall to form a cooling film along the wall, wherein the method further comprises determining the pattern for the plurality of inflow openings comprises the following steps:
specifying a minimum spacing between two adjacent ones of the plurality of inflow openings,
determining a quantity of the plurality of cooling ducts and a mean diameter for each of the plurality of inflow openings based on a specified mass flow for the cooling fluid through the plurality of cooling ducts and on a length of extent of the inflow surface along a first direction of extent of the inflow surface,
defining an isosceles triangle having three vertices with one of the plurality of inflow openings positioned centrally at each of the three vertices, wherein a length of a base of the isosceles triangle corresponds to a specified minimum spacing, the base extending along the first direction of extent,
determining a maximum width of each recess, each recess being assigned to one of the plurality of cooling ducts, on a basis of the mean diameter, and
building up the pattern in a first region of the inflow surface using a plurality of the isosceles triangles, wherein a row of the plurality of isosceles triangles situated one behind the other along the first direction of extent defines a number of vertices, wherein two adjacent ones of the plurality of isosceles triangles each have at least one of the vertices in common and at the vertices having a respective one of the plurality of inflow openings with the mean diameter, each of the plurality of inflow openings at the vertices leading to one of the plurality of cooling ducts leads into one of the recesses with the maximum width.

2. The method as claimed in claim 1 , wherein a height of the isosceles triangle and hence a spacing between a tip of the isosceles triangle and the base is dependent on the specified minimum spacing.

3. The method as claimed in claim 1 , wherein the bases of the plurality of isosceles triangles for the pattern extend parallel to one another.

4. The method as claimed in claim 1 , wherein the pattern is based on the plurality of isosceles triangles having common vertices extending along the first direction of extent and along a second direction of extent extending perpendicularly thereto.

5. The method as claimed in claim 1 , wherein the minimum spacing and the mean diameter are specified as proportional to one another.

6. The method as claimed in claim 4 , wherein, in a second region of the inflow surface, the pattern for the plurality of inflow openings is continued on the basis of the plurality of isosceles triangles having common vertices, but the mean diameter for the plurality of inflow openings of the first region being different from a mean diameter for the plurality of inflow openings of the second region.

7. The method as claimed in claim 1 , wherein, in a third region of the inflow surface, the pattern for the plurality of inflow openings is continued on the basis of the plurality of isosceles triangles having common vertices, but a minimum spacing in the third region is different than in the first region.

8. The method as claimed in claim 6 , wherein a quantity of the plurality of inflow openings for the second region is reduced along the second direction of extent by increasing the minimum spacing or height of the plurality of isosceles triangles.

9. The method as claimed in claim 1 , wherein the mean diameter is in a range of 0.2 mm to 2 mm.

10. The method as claimed in claim 1 , wherein the following applies for the minimum spacing:
2 a≤k ≤8 a

where a is the mean diameter and k is the minimum spacing.

11. The method as claimed in claim 1 , wherein the following applies for the minimum spacing:
k=i*a , where wherein i={ 2,3,4,5,6,7,8}
where a is the mean diameter and k is the minimum spacing.

12. The method as claimed in claim 1 , wherein the following applies for the maximum width of the recess:
a≤s≤ 8 a
where a is the mean diameter and s is the maximum width.

13. The method as claimed in claim 1 , wherein the following applies for the maximum width of the recess:
s=j*a , where j={ 1,2,3,4,5,6,7,8}
where a is the mean diameter and s is the maximum width.

14. The method as claimed in claim 1 , wherein the minimum spacing is based on a material off which the engine component is produced.

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Heinze Kay
• Ebel Michael

Classifications

• F01D9/065 Primary

  Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids (see also F01D25/16, F01D25/24 and F01D25/26) · CPC title

• F01D5/186

  Film cooling (F01D5/187 takes precedence) · CPC title

• F01D9/023

  Transition ducts between combustor cans and first stage of the turbine in gas-turbine engines; their cooling or sealings · CPC title

• F23R3/06 Primary

  Arrangement of apertures along the flame tube · CPC title

• F05D2240/11

  Shroud seal segments · CPC title