초록 ▼

The present disclosure provides a fir tree coupling for gas turbine engine parts comprising a load beam having a longitudinal axis, a rounded base, a first side, and a second side, wherein the rounded base has a radius of curvature from the first side to the second side, a tooth running parallel to

The present disclosure provides a fir tree coupling for gas turbine engine parts comprising a load beam having a longitudinal axis, a rounded base, a first side, and a second side, wherein the rounded base has a radius of curvature from the first side to the second side, a tooth running parallel to the longitudinal axis and disposed on the first side of the load beam. The fir tree coupling may comprise a channel through the rounded base across a portion of the radius of curvature from the first side to the second side. The channel may comprise a sidewall having a sidewall step cut into a portion of the channel sidewall.

대표청구항 ▼

1. A fir tree coupling comprising: a load beam having a longitudinal axis, a rounded base, a first side, and a second side, wherein the rounded base has a radius of curvature from the first side to the second side, a tooth running parallel to the longitudinal axis and disposed on the first side of t

1. A fir tree coupling comprising: a load beam having a longitudinal axis, a rounded base, a first side, and a second side, wherein the rounded base has a radius of curvature from the first side to the second side, a tooth running parallel to the longitudinal axis and disposed on the first side of the load beam, and a plurality of channels, extending transverse to the longitudinal axis from the first side to the second side of the load beam, defining a plurality of rounded base portions therebetween. 2. The fir tree coupling of claim 1, wherein the plurality of channels comprises a sidewall having a sidewall step cut into a portion of the sidewall. 3. The fir tree coupling of claim 1, wherein the plurality of channels comprises at least one of a concave sidewall having a concave curvature into the plurality of rounded base portions or a vertical sidewall extending perpendicular into the rounded base from the plurality of rounded base portions. 4. The fir tree coupling of claim 1, wherein the plurality of channels comprises a tapered sidewall wherein the tapered sidewall extends at a non-orthogonal angle into the rounded base from the plurality of rounded base portions. 5. The fir tree coupling of claim 1, wherein the plurality of channels is disposed at a non-orthogonal angle to the longitudinal axis of the load beam. 6. The fir tree coupling of claim 1, wherein the tooth includes a bearing surface. 7. The fir tree coupling of claim 1, wherein the load beam comprises a top surface and a cooling passage passing through the load beam from the rounded base to the top surface. 8. The fir tree coupling of claim 1, wherein the load beam comprises at least one of nickel, nickel alloy, titanium, or titanium alloy. 9. The fir tree coupling of claim 1, wherein the load beam comprises a monocrystalline material. 10. A turbine blade assembly for a gas turbine engine comprising: a platform having a dorsal surface and a ventral surface;a turbine blade extending from the dorsal surface;a fir tree coupling extending from the ventral surface, the fir tree coupling comprising a load beam having a longitudinal axis, a rounded base, a first side, and a second side,wherein the rounded base has a radius of curvature from the first side to the second side,a tooth running parallel to the longitudinal axis and disposed on the first side of the load beam,and a plurality of channels, extending transverse to the longitudinal axis from the first side to the second side of the load beam, defining a plurality of rounded base portions therebetween. 11. The turbine blade assembly of claim 10, wherein the plurality of channels comprises a sidewall having a sidewall step cut into a portion of the sidewall. 12. The turbine blade assembly of claim 10, wherein the plurality of channels comprises at least one of a concave sidewall having a concave curvature into the plurality of rounded base portions or a vertical sidewall extending perpendicular into the rounded base from the plurality of rounded base portions. 13. The turbine blade assembly of claim 10, wherein, the plurality of channels comprises a tapered sidewall wherein the tapered sidewall extends at a non-orthogonal angle into the rounded base from the plurality of rounded base portions. 14. The turbine blade assembly of claim 10, wherein the plurality of channels is disposed at a non-orthogonal angle to the longitudinal axis of the load beam. 15. The turbine blade assembly of claim 10, wherein the fir tree coupling comprises at least one of nickel, nickel alloy, titanium, or titanium alloy. 16. The turbine blade assembly of claim 10, wherein the fir tree coupling comprises a monocrystalline material, wherein the fir tree coupling comprises a first cooling passage in fluid communication with a second cooling passage within at least one of the platform or the turbine blade. 17. A method of manufacturing a fir tree coupling comprising: forming a load beam having a longitudinal axis, a rounded base, a first side, a second side, and tooth running parallel to the longitudinal axis and disposed on the first side of the load beam,forming a radius of curvature on the rounded base from the first side to the second side, andforming a plurality of channels, extending transverse to the longitudinal axis from the first side to the second side of the load beam and across the radius of curvature, defining a plurality of rounded base portions therebetween. 18. The method of claim 17, wherein the plurality of channels is disposed at a non-orthogonal angle to the longitudinal axis of the load beam.