Spring loaded airfoil vane

1. A pin assembly, comprising:

a spring housing;

a spring situated in the spring housing;

a pin having a first end configured to be received in the spring housing and to engage the spring;

a boot configured to receive a second end of the pin, wherein the boot is configured to span a gap between first and second adjacent components and configured to transfer a spring force from the spring to the first and second adjacent components; and

a seal, the seal having an opening configured to receive the second end of the pin.

2. The pin assembly of claim 1 , further comprising a compression structure configured to compress the spring against the spring housing.

3. The pin assembly of claim 2 , wherein the compression structure is a plunger.

4. The pin assembly of claim 2 , wherein the compression structure is a spring plate.

5. The pin assembly of claim 1 , wherein the pin is configured to engage the spring housing to locate the pin with respect to the spring housing.

6. The pin assembly of claim 5 , wherein the pin includes a neck, and the neck is configured to engage a notch in the spring housing.

7. The pin assembly of claim 5 , wherein the pin has a flange configured to engage the spring housing.

8. The pin assembly of claim 1 , wherein the seal has first and second legs, the first leg having the opening configured to receive the second end of the pin and the second leg configured to be sandwiched between the boot and the first and second adjacent components across the gap between the first and second adjacent components.

9. An airfoil assembly for a gas turbine engine, comprising:

first and second vanes arranged adjacent to one another with a gap therebetween;

an annular support structure arranged radially outward from the vanes;

a spring housing fixed to the annular support structure;

a spring situated in the spring housing;

a pin having a first end configured to be received in the spring housing and to engage the spring;

a boot spanning the gap, the boot configured to receive a second end of the pin and configured to transfer a spring force from the spring to the first and second vanes; and

a seal, the seal having an opening configured to receive the second end of the pin.

10. The airfoil assembly of claim 9 , wherein the spring housing is received in an opening in the annular support structure.

11. The airfoil assembly of claim 10 , further comprising a spring plate secured to the spring housing such that the spring plate covers an open end of the spring housing and compresses the spring.

12. The airfoil assembly of claim 10 , wherein the pin includes a flange configured to engage the spring housing to locate the pin with respect to the spring housing.

13. The airfoil assembly of claim 9 , wherein the spring housing includes a flange, and wherein the spring housing is secured to the annular support structure via the flange.

14. The airfoil assembly of claim 13 , further comprising a plunger compressing the spring, wherein the plunger extends through an opening in the annular support structure.

15. The airfoil assembly of claim 9 , wherein the seal has first and second legs, the first leg having the opening configured to receive the second end of the pin and the second leg configured to be sandwiched between the boot and the first and second adjacent vanes across a gap between the first and second adjacent vanes.

16. The airfoil assembly of claim 9 , wherein the first and second vanes are ceramic, and further comprising a spar piece received in a hollow airfoil section of each of the first and second vanes wherein the spar piece is metallic.

17. A method of assembling a vane assembly, comprising:

situating a boot across a gap between adjacent first and second vanes;

inserting a pin through a spring housing such that a first end of the pin is received in the boot;

inserting a spring into the spring housing such that the spring engages a second end of the pin;

compressing the spring such that the spring force is transferred to the first and second vanes and

inserting the boot into an opening of a seal, and situating the boot and seal across the gap prior to inserting the pin.