US Patent 10428663 Airfoil with tie member and spring

An airfoil includes an airfoil section that has an internal cavity and first and second endwall sections between which the airfoil section is disposed. The first endwall section includes a guide portion that has a guide opening flanked by first and second bearing lands. The first bearing land is between the guide opening and a first port in the first endwall section that opens to the internal cavity of the airfoil section. The second bearing land is between the guide opening and a second port in the first endwall section that also opens to the internal cavity. A tie member extends through the internal cavity and secures the first and second endwall sections together to trap the airfoil section. The tie member extends through the guide opening in the first endwall section. A spring member on the first and second bearing lands tensions the tie member.