Adjustable blade outer air seal apparatus
An adjustable blade outer air seal apparatus includes a case that extends circumferentially around an axis, a support ring non-rigidly mounted to the case on spring connections radially inwards of the case, whereby the support ring floats with respect to the case, and at least one blade outer air seal segment that is radially adjustable relative to the support ring.
1. An adjustable blade outer air seal apparatus, comprising:
a case structure extending circumferentially;
a support ring structure mounted radially inwards of the case structure;
at least one blade outer air seal segment radially adjustably mounted relative to the support ring structure, the at least one blade outer air seal segment including a threaded shaft;
the blade outer air seal segment and the threaded shaft are integrally formed as a single, monolithic structure; and
an actuation arm engaging a threaded portion of the threaded shaft and a clamp member secured on the threaded shaft such that the actuation arm is secured between the clamp member and the support ring structure.
2. The adjustable blade outer air seal apparatus of claim 1 , further comprising a cavity extending through the monolithic structure to an end that is flush with a seal surface of the blade outer air seal segment.
3. The adjustable blade outer air seal apparatus of claim 2 , further comprising a sensor probe at least partially within the cavity.
4. The adjustable blade outer air seal apparatus as recited in claim 3 , wherein the sensor probe has a probe end that is flush with the seal surface.
5. The adjustable blade outer air seal apparatus of claim 2 , wherein the cavity extends through the threaded shaft.
6. The adjustable blade outer air seal apparatus as recited in claim 1 , wherein the threaded shaft extends through an unthreaded opening in the support ring structure.
7. The adjustable blade outer air seal apparatus as recited in claim 1 , further comprising a threaded portion on the threaded shaft and the threaded portion includes trapezoidal threads.
8. The adjustable blade outer air seal apparatus as recited in claim 1 , wherein the support ring structure is non-rigidly mounted to the case structure.
9. The adjustable blade outer air seal apparatus as recited in claim 1 , wherein the support ring structure further comprises a first seal limiting gas leakage between the support ring structure and the blade outer air seal segment.
10. The adjustable blade outer air seal apparatus as recited in claim 9 , wherein the first seal engages a trailing end of the blade outer air seal segment.
11. The adjustable blade outer air seal apparatus as recited in claim 1 , wherein the threaded shaft is an externally threaded shaft.
12. A gas turbine engine comprising:
a compressor section;
a combustor section in fluid communication with the compressor section; and
a turbine section in fluid communication with the combustor, and
at least one of the compressor section and the turbine section including an adjustable blade outer air seal apparatus, the blade outer air seal apparatus comprising:
a case structure extending circumferentially;
a support ring structure mounted radially inwards of the case structure;
at least one blade outer air seal segment radially adjustably mounted relative to the support ring structure; and
a cavity disposed between the blade outer air seal segment and the support ring structure; and
a first seal arranged between the support ring structure and the blade outer air seal segment, the first seal configured to limit gas leakage between the support ring structure and the blade outer air seal segment.
13. The gas turbine engine of claim 12 , wherein the first seal extends axially from the support ring structure.
14. The gas turbine engine of claim 13 , wherein the first seal engages a trailing end of the blade outer air seal segment.
15. The gas turbine engine as recited in claim 12 , including a fan coupled to be driven through a gear assembly by the turbine section.