BACKGROUND OF THE DISCLOSURE
1. Technical Field
This disclosure relates generally to a turbine engine and, more particularly, to cooling apertures and formation thereof in a component of the turbine engine.
2. Background Information
A gas turbine engine includes various fluid cooled components such as turbine blades and turbine vanes. Such fluid cooled components may include one or more cooling apertures extending through a sidewall of the respective component. Various methods are known in the art for forming cooling apertures. While these known cooling aperture formation methods have various benefits, there is still room in the art form improvement.
SUMMARY OF THE DISCLOSURE
According to an aspect of the present disclosure, a manufacturing method is provided during which a preform component for a turbine engine is provided. A cooling aperture is formed in the preform component. The cooling aperture includes a centerline, an inlet and an outlet. The cooling aperture extends longitudinally along the centerline through a wall of the preform component from the inlet to the outlet. The forming of the cooling aperture includes forming a first portion of the cooling aperture using a machining tool implement with a first toolpath that is angularly offset from the centerline by a first angle between thirty-five degrees and ninety degrees.
According to another aspect of the present disclosure, another manufacturing method is provided during which a preform component for a turbine engine is provided. A cooling aperture is formed in the preform component. The cooling aperture includes a centerline, an inlet and an outlet. The cooling aperture extends longitudinally along the centerline through a wall of the preform component from the inlet to the outlet. The forming of the cooling aperture includes: forming a first portion of the cooling aperture using a machining tool implement with a first toolpath; and forming a second portion of the cooling aperture using the machining tool implement with a second toolpath that is angularly offset from the first toolpath by a first angle greater than forty-five degrees.
According to another aspect of the present disclosure, another manufacturing method is provided during which a preform component for a turbine engine is provided. A cooling aperture is formed in the preform component. The cooling aperture includes a centerline, an inlet and an outlet. The cooling aperture extends longitudinally along the centerline through a wall of the preform component from the inlet to the outlet. The forming of the cooling aperture includes removing material from the preform component using a machining tool implement to form a sidewall surface of the cooling aperture, where machining tool implement has a first toolpath that is coincident with the sidewall surface.
According to still another aspect of the present disclosure, another manufacturing method is provided during which a preform component for a turbine engine is provided. A cooling aperture is formed in the preform component. The cooling aperture includes a centerline, an inlet and an outlet. The cooling aperture extends longitudinally along the centerline through a wall of the preform component from the inlet to the outlet. The forming of the cooling aperture includes forming a first portion of the cooling aperture using a first energy beam that is angularly offset from the centerline by a first angle between thirty-five degrees and ninety degrees.
The first angle may be equal to or greater than forty-five degrees.
The first angle may be equal to or greater than sixty degrees.
The first angle may be equal to or greater than seventy-five degrees.
The forming of the cooling aperture may also include forming a second portion of the cooling aperture using the machining tool implement with a second toolpath that is angularly offset from the centerline by a second angle less than or equal to thirty-five degrees.
The forming of the cooling aperture may also include forming a second portion of the cooling aperture using the machining tool implement with a second toolpath that is parallel with the centerline.
The machining tool implement may remove material from the preform component to form a sidewall surface of the cooling aperture. The first toolpath may be coincident with the sidewall surface.
The first toolpath may be angularly offset from the sidewall surface by a second angle that is equal to or greater than forty-five degrees.
The forming of the cooling aperture may also include forming a second portion of the cooling aperture using the machining tool implement with a second toolpath that is angularly offset from the centerline by a second angle. The first toolpath may be angularly offset from the second toolpath by a third angle equal to or greater than forty-five degrees.
The third angle may be equal to or greater than sixty degrees.
The second angle may be between thirty-five degrees and ninety degrees.
The forming of the cooling aperture may also include forming a second portion of the cooling aperture using the machining tool implement with a second toolpath that is angularly offset from the centerline by a second angle between thirty-five degrees and ninety degrees. The first toolpath may be non-coplanar with the second toolpath.
The cooling aperture may include a meter section and a diffuser section.
The preform component may be configured as or otherwise include a preform of an airfoil for the turbine engine and/or a preform of a flowpath wall for the turbine engine.
The machining tool implement may be configured as or otherwise include an energy beam. The first toolpath may be a first trajectory of the energy beam.
The machining tool implement may be configured as or otherwise include a fluid jet. The first toolpath may be a first trajectory of the fluid jet.
The machining tool implement may be configured as or otherwise include a machining bit. The first toolpath may be a centerline of the machining bit.
The cooling aperture may be formed with a compound intersection between a curved surface and a second surface.
The second surface may be another curved surface.
The second surface may be a straight surface.
The present disclosure may include any one or more of the individual features disclosed above and/or below alone or in any combination thereof.
The foregoing features and the operation of the invention will become more apparent in light of the following description and the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side cutaway illustration of a geared turbofan turbine engine.
FIG. 2 is a perspective illustration of a portion of a fluid cooled component.
FIG. 3 is a sectional illustration of a portion of the fluid cooled component taken along a centerline of a cooling aperture.
FIG. 4 is a cross-sectional illustration of a portion of the fluid cooled component at a meter section outlet of the cooling aperture.
FIG. 5 is a cross-sectional illustration of a portion of the fluid cooled component at a diffuser section inlet of the cooling aperture.
FIG. 6 is a side illustration of a portion of the fluid cooled component at an outlet of the cooling aperture and its diffuser section.
FIGS. 7 and 8 are side illustrations of portions of the fluid cooled component configured with various multi-lobed cooling apertures.
FIGS. 9A-E are sectional illustrations of the fluid cooled component along a portion of a cooling aperture surface with various configurations.
FIGS. 10A-E are sectional illustrations of the fluid cooled component along a portion of a cooling aperture surface with various configurations.
FIG. 11 is a flow diagram of a method for manufacturing a fluid cooled component.
FIG. 12 is a sectional illustration of a portion of a preform substrate.
FIG. 13 is a sectional illustration of a portion of the preform substrate configured with a preform inner coating.
FIG. 14 is a sectional illustration of a portion of the preform substrate further configured with a preform outer coating.
FIG. 15 is a sectional illustration of a portion of a preform component configured with a cooling aperture formed therein.
FIGS. 16A-B are sectional illustrations of a portion of the preform component during formation of a portion of the cooling aperture.
FIGS. 17 and 18 are sectional illustrations of a portion of the preform component during formation of a portion of the cooling aperture.
FIGS. 19A-C are schematic illustrations depicting various positions an energy beam may be oriented during formation of the cooling aperture.
DETAILED DESCRIPTION
The present disclosure includes methods for manufacturing fluid cooled components of a gas turbine engine. For ease of description, the turbine engine may be described below as a turbofan turbine engine. The present disclosure, however, is not limited to such an exemplary gas turbine engine. The turbine engine, for example, may alternatively be configured as a turbojet turbine engine, a turboprop turbine engine, a turboshaft turbine engine, a propfan turbine engine, a pusher fan turbine engine or an auxiliary power unit (APU) turbine engine. The turbine engine may be configured as a geared turbine engine or a direct drive turbine engine. The present disclosure is also not limited to aircraft applications. The turbine engine, for example, may alternatively be configured as a ground-based industrial turbine engine for power generation, or any other type of turbine engine which utilizes fluid cooled components.
FIG. 1 is a side cutaway illustration of the turbofan turbine engine 20. This turbine engine 20 extends along an axial centerline 22 between a forward, upstream airflow inlet 24 and an aft, downstream airflow exhaust 26. The turbine engine 20 includes a fan section 28, a compressor section 29, a combustor section 30, a turbine section 31 and an exhaust section 32 (partially shown in FIG. 1). The compressor section 29 includes a low pressure compressor (LPC) section 29A and a high pressure compressor (HPC) section 29B. The turbine section 31 includes a high pressure turbine (HPT) section 31A and a low pressure turbine (LPT) section 31B.
The engine sections 28-31 are arranged sequentially along the axial centerline 22 within an engine housing 34. This engine housing 34 includes an inner case 36 (e.g., a core case) and an outer case 38 (e.g., a fan case). The inner case 36 may house one or more of the engine sections 29A-31B; e.g., an engine core. The outer case 38 may house at least the fan section 28.
Each of the engine sections 28, 29A, 29B, 31A and 31B includes a respective rotor 40-44. Each of these rotors 40-44 includes a plurality of rotor blades arranged circumferentially around and connected to one or more respective rotor disks. The rotor blades, for example, may be formed integral with or mechanically fastened, welded, brazed, adhered and/or otherwise attached to the respective rotor disk(s).
The fan rotor 40 is connected to a gear train 46, for example, through a fan shaft 48. The gear train 46 and the LPC rotor 41 are connected to and driven by the LPT rotor 44 through a low speed shaft 49. The HPC rotor 42 is connected to and driven by the HPT rotor 43 through a high speed shaft 50. The shafts 48-50 are rotatably supported by a plurality of bearings 52; e.g., rolling element and/or thrust bearings. Each of these bearings 52 is connected to the engine housing 34 by at least one stationary structure such as, for example, an annular support strut.
During operation, air enters the turbine engine 20 through the airflow inlet 24. This air is directed through the fan section 28 and into a core flowpath 54 and a bypass flowpath 56. The core flowpath 54 extends sequentially through the engine sections 29A-32. The air within the core flowpath 54 may be referred to as “core air”. The bypass flowpath 56 extends through a bypass duct, which bypasses the engine core. The air within the bypass flowpath 56 may be referred to as “bypass air”.
The core air is compressed by the LPC rotor 41 and the HPC rotor 42 and directed into a combustion chamber 58 of a combustor in the combustor section 30. Fuel is injected into the combustion chamber 58 and mixed with the compressed core air to provide a fuel-air mixture. This fuel air mixture is ignited and combustion products thereof flow through and sequentially cause the HPT rotor 43 and the LPT rotor 44 to rotate. The rotation of the HPT rotor 43 and the LPT rotor 44 respectively drive rotation of the HPC rotor 42 and the LPC rotor 41 and, thus, compression of the air received from a core airflow inlet. The rotation of the LPT rotor 44 also drives rotation of the fan rotor 40, which propels bypass air through and out of the bypass flowpath 56. The propulsion of the bypass air may account for a majority of thrust generated by the turbine engine 20, e.g., more than seventy-five percent (75%) of engine thrust. The turbine engine 20 of the present disclosure, however, is not limited to the foregoing exemplary thrust ratio.
The turbine engine 20 includes a plurality of fluid cooled components (e.g., 60A-H; generally referred to as “60”) arranged within, for example, the combustor section 30, the turbine section 31 and/or the exhaust section 32. Examples of these fluid cooled components 60 include airfoils such as, but not limited to, a rotor blade airfoil (e.g., 60A, 60D) and a stator vane airfoil (e.g., 60B, 60C, 60H). Other examples of the fluid cooled components 60 include flowpath walls such as, but not limited to, a combustor wall (e.g., 60F), an exhaust duct wall (e.g., 60E), a shroud or other flowpath wall (e.g., 60G), a rotor blade platform and a stator vane platform. Of course, various other fluid cooled components may be included in the turbine engine 20, and the present disclosure is not limited to any particular types or configurations thereof.
FIG. 2 illustrates a portion of one of the fluid cooled components 60 within the turbine engine 20. This fluid cooled component 60 has a component wall 62 (e.g., a sidewall or an endwall) configured with one or more cooling apertures 64.
Referring to FIG. 3, the component wall 62 has a thickness 66 that extends vertically (e.g., along a z-axis) between and to a first surface 68 and a second surface 70. The component first surface 68 may be configured as an interior and/or a cold side surface of the component wall 62. The component first surface 68, for example, may at least partially form a peripheral boundary of a cooling fluid volume 72 (e.g., a cavity or a passage) along the component wall 62. The component first surface 68 may thereby be subject to relatively cool fluid (e.g., cooling air) supplied to the cooling fluid volume 72. This cooling fluid volume 72 may be an internal volume formed within the fluid cooled component 60 where, for example, the component is an airfoil. Alternatively, the cooling fluid volume 72 may be an external volume formed external to the fluid cooled component 60 where, for example, the component is a flowpath wall. The component second surface 70 may be configured as an exterior and/or a hot side surface of the component wall 62. The component second surface 70, for example, may at least partially form a peripheral boundary of a portion of, for example, the core flowpath 54 along the component wall 62. The component second surface 70 may thereby be subject to relative hot fluid (e.g., combustion products) flowing through the core flowpath 54 within, for example, one of the engine sections 30-32 of FIG. 1.
The component wall 62 of FIG. 3 includes a component substrate 74 and one or more external component coatings 76 and 78. The component substrate 74 at least partially or completely forms and carries the component first surface 68. The component substrate 74 has a thickness 80 that extends vertically (e.g., along the z-axis) between and to the component first surface 68 and a second surface 82 of the component substrate 74. This substrate second surface 82 may be configured as an exterior surface of the component substrate 74 prior to being (e.g., partially or completely) covered by the one or more component coatings 76 and 78. The substrate thickness 80 may be greater than one-half (½) of the wall thickness 66. The substrate thickness 80, for example, may be between two-third (⅔) and four-fifths (⅘) of the wall thickness 66.
The component substrate 74 is constructed from substrate material 84. This substrate material 84 may be an electrically conductive material. The substrate material 84, for example, may be or otherwise include metal. Examples of the metal include, but are not limited to, nickel (Ni), titanium (Ti), aluminum (Al), chromium (Cr), cobalt (Co), and alloys thereof. The metal, for example, may be a nickel or cobalt based superalloy such as, but not limited to, PWA 1484 or PWA 1429.
The inner coating 76 may be configured as a bond coating between the component substrate 74 and the outer coating 78. The inner coating 76 of FIG. 3 is bonded (e.g., directly) to the substrate second surface 82. The inner coating 76 at least partially or completely covers the substrate second surface 82 (e.g., along an x-y plane of FIG. 2). The inner coating 76 has a thickness 86 that extends vertically (e.g., along the z-axis) between and to component substrate 74 and the outer coating 78. This inner coating thickness 86 may be less than one-seventh ( 1/7) of the wall thickness 66. The inner coating thickness 86, for example, may be between one-eighth (⅛) and one-fortieth ( 1/40) of the wall thickness 66.
The inner coating 76 is constructed from inner coating material 88. This inner coating material 88 may be an electrically conductive material. The inner coating material 88, for example, may be or otherwise include metal. Examples of the metal include, but are not limited to, MCrAlY and MAlCrX, where “M” is nickel (Ni), cobalt (Co), iron (Fe) or any combination thereof, and where “Y” or “X” is hafnium (Hf), yttrium (Y), silicon (Si) or any combination thereof. The MCrAlY and MAlCrX may be further modified with strengthening elements such as, but not limited to, tantalum (Ta), rhenium (Re), tungsten (W), molybdenum (Mo) or any combination thereof. An example of the MCrAlY is PWA 286.
The inner coating 76 may be formed from a single layer of the inner coating material 88. The inner coating 76 may alternatively be formed from a plurality of layers of the inner coating material 88, where the inner coating material 88 within each of those inner coating layers may be the same as one another or different from one another.
The outer coating 78 may be configured as a protective coating for the component substrate 74 and, more generally, the fluid cooled component 60. The outer coating 78, for example, may be configured as a thermal barrier layer and/or an environmental layer. The outer coating 78 at least partially or completely forms and carries the component second surface 70. The outer coating 78 of FIG. 2 is bonded (e.g., directly) to a second (e.g., exterior) surface 90 of the inner coating 76. The outer coating 78 at least partially or completely covers the inner coating second surface 90 as well as the underlying substrate second surface 82 (e.g., along an x-y plane of FIG. 2). The outer coating 78 has a thickness 92 that extends vertically (e.g., along the z-axis) between and to the inner coating 76 and the component second surface 70. This outer coating thickness 92 may be less than one-half (½) of the wall thickness 66. The outer coating thickness 92, for example, may be between one-third (⅓) and one-eighth (⅛) of the wall thickness 66. The outer coating thickness 92, however, may be greater than the inner coating thickness 86.
The outer coating 78 is constructed from outer coating material 94. This outer coating material 94 may be a non-electrically conductive material. The outer coating material 88, for example, may be or otherwise include ceramic. Examples of the ceramic include, but are not limited to, yttria stabilized zirconia (YSZ) and gadolinium zirconate (GdZ). The outer coating material 94 of the present disclosure is not limited to non-electrically conductive materials. In other embodiments, for example, the outer coating material 94 may be an electrically conductive material; e.g., metal.
The outer coating 78 may be formed from a single layer of the outer coating material 94. The outer coating 78 may alternatively be formed from a plurality of layers of the outer coating material 94, where the outer coating material 94 within each of those outer coating layers may be the same as one another or different from one another. For example, the outer coating 78 may include a thin interior layer of the YSZ and a thicker exterior later of the GdZ.
Each of the cooling apertures 64 extends along a respective longitudinal centerline 96 between and to an inlet 98 of the respective cooling aperture 64 and an outlet 100 of the respective cooling aperture 64. The cooling aperture inlet 98 of FIG. 3 is located in the component first surface 68. The cooling aperture inlet 98 thereby fluidly couples its respective cooling aperture 64 with the cooling fluid volume 72 along the component first surface 68. The cooling aperture outlet 100 of FIG. 3 is located in the component second surface 70. The cooling aperture outlet 100 thereby fluidly couples its respective cooling aperture 64 with the core flowpath 54 along the component second surface 70.
Each of the cooling apertures 64 may include a meter section 102 and a diffuser section 104. The meter section 102 is disposed at (e.g., on, adjacent or proximate) the cooling aperture inlet 98. The meter section 102 is configured to meter (e.g., regulate) a flow of cooling fluid flowing from the cooling fluid volume 72, through the substrate material 84, to the diffuser section 104. The diffuser section 104 is disposed at the cooling aperture outlet 100. The diffuser section 104 is configured to diffuse the cooling fluid exhausted (e.g., directed out) from the cooling aperture outlet 100 into, for example, a film for cooling a downstream portion of the component second surface 70.
The meter section 102 of FIG. 3 extends longitudinally along the longitudinal centerline 96 within (e.g., partially into) the component substrate 74. More particularly, the meter section 102 extends longitudinally along a meter segment 106 of the longitudinal centerline 96 (e.g., a centerline of the meter section 102) from the cooling aperture inlet 98 to an outlet 108 of the meter section 102. The meter section outlet 108 of FIG. 3 is disposed vertically within the component substrate 74 intermediately between the component first surface 68 and the substrate second surface 82. The meter section outlet 108 of FIG. 3 is thereby vertically recessed into the component substrate 74 by a vertical distance 110 (e.g., along the z-axis).
The longitudinal centerline 96 and its (e.g., entire) meter segment 106 of FIG. 3 are angularly offset from the component first surface 68 by an included angle 112. This meter segment angle 112 may be an acute angle, or a right angle. The meter segment angle 112, for example, may be between ten degrees (10°) and eighty degrees (80°); e.g., between twenty degrees (20°) and thirty degrees (30°).
The meter section 102 has a longitudinal length 114 measured along the meter segment 106 between the cooling aperture inlet 98 and the meter section outlet 108.
Referring to FIG. 4, the meter section 102 has a first lateral width 118A (e.g., a major axis dimension; e.g., along the y-axis) and a second lateral width 118B (e.g., a minor axis dimension; e.g., along the x-axis). These lateral widths 118A and 118B (generally referred to as “118”) may be measured, for example, along/within a plane parallel with the component first surface 68 and/or the component second surface 70 (see FIG. 3); e.g., the x-y plane. The first lateral width 118A of FIG. 4 is greater than the second lateral width 118B. However, in other embodiments, the first lateral width 118A may be equal to or less than the second lateral width 118B.
The meter section 102 has a cross-sectional geometry when viewed, for example, in a (e.g., x-y plane) plane parallel with the component first surface 68 and/or the component second surface 70 (see FIG. 3); e.g., the plane of FIG. 4. This meter section cross-sectional geometry may be uniform (e.g., remain constant) along the longitudinal length 114 of the meter section 102. The meter section cross-sectional geometry of FIG. 4 has a rounded shape. Examples of the rounded shape include, but are not limited to, an oval, an ellipse and a circle. The present disclosure, however, is not limited to the foregoing exemplary meter section cross-sectional geometry shapes as discussed below in further detail.
The diffuser section 104 of FIG. 3 extends longitudinally along the longitudinal centerline 96 out of the component substrate 74, through the inner coating 76 and the outer coating 78. More particularly, the diffuser section 104 of FIG. 3 extends longitudinally along a diffuser segment 120 of the longitudinal centerline 96 (e.g., a centerline of the diffuser section 104) from an inlet 122 of the diffuser section 104 (here, also the meter section outlet 108), through the materials 84, 88 and 94, to the cooling aperture outlet 100. The diffuser section inlet 122 of FIG. 3 is disposed vertically within the component substrate 74 intermediately between the component first surface 68 and the substrate second surface 82. The diffuser section inlet 122 of FIG. 3 is thereby vertically recessed into the component substrate 74 by the vertical distance 110 (e.g., along the z-axis).
The longitudinal centerline 96 and its (e.g., entire) diffuser segment 120 of FIG. 3 are angularly offset from the component second surface 70 by an included angle 124. This diffuser segment angle 124 may be an acute angle. The diffuser segment angle 124, for example, may be between twenty degrees (20°) and eighty degrees (80°); e.g., between thirty-five degrees (35°) and fifty-five degrees (55°). The diffuser segment angle 124 of FIG. 3 is different (e.g., less) than the meter segment angle 112. The diffuser segment 120 may thereby be angularly offset from the meter segment 106.
The diffuser section 104 has a longitudinal length 126 measured along the diffuser segment 120 between the diffuser section inlet 122 and the cooling aperture outlet 100. This diffuser section longitudinal length 126 may be equal to or different (e.g., less or greater) than the meter section longitudinal length 114.
Referring to FIG. 5, the diffuser section 104 has a first lateral width 130A (e.g., a major axis dimension; e.g., along the y-axis) and a second lateral width 130B (e.g., a minor axis dimension; e.g., along the x-axis). These lateral widths 130A and 130B (generally referred to as “130”) may be measured, for example, along/within a plane parallel with the component first surface 68 and/or the component second surface 70 (see FIG. 3); e.g., the x-y plane. The first lateral width 130A of FIG. 5 is greater than the second lateral width 130B. However, in other embodiments, the first lateral width 130A may be equal to or less than the second lateral width 130B.
The first lateral width 130A and the corresponding first lateral width 118A (see FIG. 4) at an interface 132 (see FIG. 3) between the meter section 102 and the diffuser section 104 are equal. Similarly, the second lateral width 130B and the corresponding second lateral width 118B (see FIG. 4) at the interface 132 (see FIG. 3) between the meter section 102 and the diffuser section 104 are equal. However, the lateral widths 130 of the diffuser section 104 at other locations along the longitudinal centerline 96 may be greater the corresponding lateral widths 118 of the meter section 102 (see FIG. 4). More particularly, the diffuser section 104 of FIG. 3 (see also transition from FIG. 5 to FIG. 6) laterally diverges as the diffuser section 104 projects longitudinally away from the meter section 102 towards or to the cooling aperture outlet 100.
Referring to FIG. 5, the diffuser section 104 has a cross-sectional geometry when viewed, for example, in a plane parallel with the component first surface 68 and/or the component second surface 70 (see FIG. 3); e.g., the x-y plane. At the interface 132, the diffuser section cross-sectional geometry is the same as the meter section cross-sectional geometry (see FIG. 4). The diffuser section cross-sectional geometry of FIG. 5, for example, has a rounded shape. Examples of the rounded shape include, but are not limited to, an oval, an ellipse and a circle. The present disclosure, however, is not limited to the foregoing exemplary diffuser section cross-sectional geometry shapes as discussed below in further detail.
Referring to FIGS. 3, 5 and 6, a shape and/or dimensions of the diffuser section cross-sectional geometry change as the diffuser section 104 projects longitudinally away from the meter section 102, e.g. sequentially through the materials 84, 88 and 94 of FIG. 3, to the cooling aperture outlet 100. For example, at the cooling aperture outlet 100 of FIG. 6, the diffuser section cross-sectional geometry may have a complex shape when viewed, for example, in a plane parallel with the component first surface 68 and/or the component second surface 70; e.g., the x-y plane. This diffuser section cross-sectional geometry of FIG. 6 includes a (e.g., curved or straight) leading edge section 134, a (e.g., curved or straight) trailing edge section 136 and opposing (e.g., curved or straight; concave, convex and/or splined) sidewall sections 138A and 138B (generally referred to as “138”). Each of the sidewall sections 138 extends between and to respective ends of the leading and the trailing edge sections 134 and 136. A lateral width of the leading edge section 134 may be different (e.g., smaller) than a lateral width of the trailing edge section 136. The sidewall sections 138 may thereby generally laterally diverge away from one another as the sidewall sections 138 extend from the leading edge section 134 to the trailing edge section 136.
In some embodiments, referring to FIG. 6, the diffuser section 104 may be configured as a single lobe diffuser section. In other embodiments, referring to FIGS. 7 and 8, the diffuser section 104 may be configured as a multi-lobe diffuser section. Various other single lobe and multi-lobe diffuser sections for cooling apertures are known in the art, and the present disclosure is not limited to any particular ones thereof. Further details on various multi-lobe diffuser sections can be found in U.S. Pat. No. 9,598,979, which is assigned to the assignee of the present disclosure and hereby incorporated herein by reference in its entirety.
Surfaces forming the cooling aperture 64 and its section 102 and 104 may have various configurations. For example, referring to FIG. 9A, the cooling aperture 64 (e.g., in the meter section 102 or the diffuser section 104) may be at least partially formed by a surface 140A with a straight, flat sectional geometry when viewed in a first plane; e.g., a y-z plane. This first plane may be parallel with the longitudinal centerline 96 (see FIG. 3), or at least a segment thereof (e.g., 106, 120). Referring to FIGS. 9B and 9C, the cooling aperture 64 (e.g., in the meter section 102 or the diffuser section 104) may also or alternatively be at least partially formed by a surface 140B, 140C with a convex sectional geometry when viewed in the first plane. This convex sectional geometry may be curved (e.g., see FIG. 9B) and/or compound (e.g., see FIG. 9C). Referring to FIGS. 9D and 9E, the cooling aperture 64 (e.g., in the meter section 102 or the diffuser section 104) may also or alternatively be at least partially formed by a surface 140D, 140E with a concave sectional geometry when viewed in the first plane. This concave sectional geometry may be curved (e.g., see FIG. 9D) and/or compound (e.g., see FIG. 9E).
Referring to FIG. 10A, the cooling aperture 64 (e.g., in the meter section 102 or the diffuser section 104) may be at least partially formed by a surface 142A with a straight, flat sectional geometry when viewed in a second plane; e.g., a x-z plane. This second plane may be perpendicular to the longitudinal centerline 96 (see FIG. 3), or at least a segment thereof (e.g., 106, 120). Referring to FIGS. 10B and 10C, the cooling aperture 64 (e.g., in the meter section 102 or the diffuser section 104) may also or alternatively be at least partially formed by a surface 142B, 142C with a concave sectional geometry when viewed in the first plane. This concave sectional geometry may be curved (e.g., see FIG. 10B) and/or compound (e.g., see FIG. 10C). Referring to FIGS. 10D and 10E, the cooling aperture 64 (e.g., in the meter section 102 or the diffuser section 104) may also or alternatively be at least partially formed by a surface 142D, 142E with a convex sectional geometry when viewed in the first plane. This convex sectional geometry may be curved (e.g., see FIG. 10D) and/or compound (e.g., see FIG. 10E).
The various surfaces 140A-E (generally referred to as “140”) and 142A-E (generally referred to as “142”) are described above as discrete surfaces for the cooling aperture 64. However, any one of the foregoing first plane geometries (e.g., geometries of FIGS. 9A-E) may be combined with any one of the second plane geometries (e.g., geometries of FIGS. 10A-E). For example, the surface 140A of FIG. 9A may also have the geometry of the surface 142 in FIG. 10A, 10B, 10C, 10D or 10E as well, etc. In other words, one or more surfaces (e.g., 140, 142) forming the cooling aperture 64 may be simple and/or complex in multiple planes; e.g., in a three-dimensional (3D) fashion.
FIG. 11 is a flow diagram of a method 1100 for manufacturing a fluid cooled component. For ease of description, the method 1100 is described below with reference to the fluid cooled component 60 described above. The method 1100 of the present disclosure, however, is not limited to manufacturing such an exemplary fluid cooled component.
In step 1102, a preform substrate 74′ is provided. Referring to FIG. 12, the preform substrate 74′ may generally have the configuration (e.g., shape, size, etc.) of the substrate 74 for the fluid cooled component 60 to be formed (e.g., see FIG. 3). The preform substrate 74′ of FIG. 12, however, does not include any holes therein for forming the cooling apertures 64.
In step 1104, a preform inner coating 76′ is applied over the preform substrate 74′. For example, referring to FIG. 13, the inner coating material 88 may be applied (e.g., deposited) onto the second surface 82 of the preform substrate 74′. The inner coating material 88 may be applied using various inner coating application techniques. Examples of the inner coating application techniques include, but are not limited to, a physical vapor deposition (PVD) process, chemical vapor deposition (CVD) process, a plating process, and a thermal spray process (e.g., a plasma spray (PS) process, a high velocity oxygen fuel (HVOF) process, high velocity air fuel (HVAF) process, a wire spray process or a combustion spray process). The inner coating application may be performed via a non-line-of-sight (NLOS) coating process or a direct-line-of-sight (DLOS) coating process. The preform inner coating 76′ of FIG. 13 may generally have the configuration of the inner coating 76 for the fluid cooled component 60 to be formed (e.g., see FIG. 3). The preform inner coating 76′ of FIG. 13, however, does not include any holes for forming the cooling apertures 64.
In step 1106, a preform outer coating 78′ is applied over the preform substrate 74′ and the preform inner coating 76′. For example, referring to FIG. 14, the outer coating material 94 may be applied (e.g., deposited) onto the second surface 90 of the preform inner coating 76′. The outer coating material 94 may be applied using various outer coating application techniques. Examples of the outer coating application techniques include, but are not limited to, a physical vapor deposition (PVD) process (e.g., an electron-beam PVD process), chemical vapor deposition (CVD) process, a thermal spray process (e.g., a plasma spray (PS) process, a high velocity oxygen fuel (HVOF) process, high velocity air fuel (HVAF) process, a wire spray process or a combustion spray process). The outer coating application may be performed via a non-line-of-sight (NLOS) coating process or a direct-line-of-sight (DLOS) coating process. The preform outer coating 78′ of FIG. 14 may generally have the configuration of the outer coating 78 for the fluid cooled component 60 to be formed (e.g., see FIG. 3). The preform outer coating 78′ of FIG. 14, however, does not include any holes for forming the cooling apertures 64.
The combination of the preform substrate 74′, the preform inner coating 76′ and the preform outer coating 78′ may provide a preform component 60′. This preform component 60′ of FIG. 14 may generally have the configuration of the fluid cooled component 60 to be formed (e.g., see FIG. 3). The preform component 60′ of FIG. 14, however, does not include any holes for forming the cooling apertures 64.
In step 1108, the cooling aperture 64 is formed in the preform component 60′. For example, referring to FIG. 15, the cooling aperture 64 and its various sections (e.g., 102 and 104) may be formed using a single machining process. Alternatively, different sections (e.g., 102 and 104) of the cooling aperture 64 may be formed using different machining processes. For example, the diffuser section 104 may be formed in the materials 94, 88 and 84 using a first machining process such as a laser machining (e.g., ablation) process, a water-jet guided laser (WJGL) machining process, an abrasive water jet (AWJ) machining process, an electron beam machining process, and a mechanical drilling process. The meter section 102 may then be formed in the substrate material 84 using a second machining process such as an electrical discharge machining (EDM) process. The present disclosure, however, is not limited to any particular formation processes. For example, the meter section 102 may alternatively be formed using a laser machining (e.g., ablation) process, a water-jet guided laser (WJGL) machining process, an abrasive water jet (AWJ) machining process, an electron beam machining process, and a mechanical drilling process. Following this formation step 1108, the preform component 60′ may now be the fully formed fluid cooled component 60.
During the machining of the cooling aperture 64, a tool may have various orientations relative to the preform component 60′. These orientations are selected to facilitate formation of surfaces forming the cooling aperture 64 and its sections (e.g., 102 and 104), particularly portions of the cooling apertures 64 with complex cross-sectional and/or sectional geometries. For example, referring to FIG. 16A, an energy beam 144 (e.g., a laser beam or an electron beam) generated by a machining tool may be directed along a trajectory that is parallel with the longitudinal centerline 96 (or at least one of its segments 106, 120) when forming a portion of the cooling aperture 64; e.g., a portion of one of the sections 102, 104. Referring to FIG. 16B, the energy beam 144 may also or alternatively be directed along a trajectory that is (e.g., slightly) angularly offset from the longitudinal centerline 96 (or at least one of its segments 106, 120) by an included acute angle 146 when forming a portion of the cooling aperture; e.g., a portion of one of the sections 102, 104. This angle 146 may be less than or equal to thirty-five degrees (35°); e.g., less than twenty-five degrees (25°), less than fifteen degrees (15°), etc. Orienting the energy beam 144 along the trajectories of FIGS. 16A and 16B may be referred to as a general gun barrel approach since the energy beam 144 is parallel with (e.g., see FIG. 16A) or slightly angularly offset from (e.g., see FIG. 16B) sidewall surfaces 148A and 148B of the cooling aperture 64.
The gun barrel approach discussed above may be used for forming a central region of the cooling aperture 64 and/or portions of the cooling aperture 64 with relatively simple cross-sectional and/or sectional geometries. However, referring to FIG. 17, the gun barrel approach may be difficult to use when a feature 150 such as a projection 152 obscures or limits a line of sight for the energy beam 144 to another portion 154 of the cooling aperture 64 to be formed. In such situations, the machining tool and/or the preform component 60′ may be moved to reorient a trajectory of the energy beam 144 relative to the longitudinal centerline 96 (or at least one of its segments 106, 120). For example, referring to FIG. 18, the energy beam 144 may be directed along a trajectory that is angularly offset from the longitudinal centerline 96 (or at least one of its segments 106, 120) by an included angle 156; e.g., a right angle or an acute angle. This angle 156 may be between thirty-five degrees (35°) and ninety degrees (90°); e.g., greater than forty-five degrees (45°), sixty degrees (60°) or seventy-five degrees (75°). Here, the energy beam trajectory may be coincident with a sidewall surface 158 being formed by the energy beam 144. For example, the energy beam 144 may be angularly offset from the to-be formed sidewall surface 158 by an included angle 160; e.g., a right angle or an acute angle. This angle 160 may be between thirty-five degrees (35°) and ninety degrees (90°); e.g., greater than forty-five degrees (45°), sixty degrees (60°) or seventy-five degrees (75°). With such an energy beam orientation, the energy beam 144 may reach an area which may otherwise be obscured. This reorienting of the energy beam 144/the machining tool relative to the preform component 60′ therefore may facilitate formation of cooling aperture geometries which otherwise may not be possible to form using standard machining techniques using, for example, a gun barrel approach.
During the formation of the cooling aperture 64, the machining tool and its energy beam 144 may be reoriented within the first plane (e.g., the y-z plane) to one or more or all of the positions shown, for example, in FIG. 19A, or any position therebetween. The machining tool and its energy beam 144 may also or alternatively be reoriented within the second plane (e.g., the x-z plane) to one or more or all of the positions shown, for example, in FIG. 19B, or any position therebetween. The machining tool and its energy beam 144 may also or alternatively be reoriented within a third plane (e.g., the x-y plane) to one or more or all of the positions shown, for example, in FIG. 19C, or any position therebetween. The energy beam 144 may thereby be moved to various different planes during formation of the cooling aperture 64.
For ease of description, the machining process is described above with respect to forming the cooling aperture 64 using an energy beam such as a laser beam or an electron beam. The present disclosure, however, is not limited to energy beam machining. For example, a toolpath (e.g., trajectory and/or centerline) for a water jet, a drill bit, a grinding bit and/or various other machining tool implements (e.g., an energy beam, a fluid jet, a machining bit, etc.) may be adjusted, reoriented in the same manner as described above to form the cooling aperture 64. Also, for ease of description, the method 1100 is described above with respect to formation of a single cooling aperture 64 of the fluid cooled component 60. However, the fluid cooled component 60 may be formed with multiple of the cooling apertures 64, for example, by repeating the formation step 1108 at multiple locations along the preform component 60′.
While various embodiments of the present disclosure have been described, it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the disclosure. For example, the present disclosure as described herein includes several aspects and embodiments that include particular features. Although these features may be described individually, it is within the scope of the present disclosure that some or all of these features may be combined with any one of the aspects and remain within the scope of the disclosure. Accordingly, the present disclosure is not to be restricted except in light of the attached claims and their equivalents.
Patent Grant
11542831
