Stator shroud with mechanical retention
A stator assembly for a gas turbine engine includes an arcuate shroud including a shroud pocket, the shroud pocket having a shroud slot extending therethrough. A stator vane is insertable into the shroud pocket and includes a vane slot extending therethrough. A strap extends through the shroud slot and the vane slot to retain the vane to the shroud. A gas turbine engine includes a combustor and a stator and case assembly in in fluid communication with the combustor. The stator and case assembly includes a case defining a working fluid flowpath for the gas turbine engine and a stator assembly secured at the case.
1. A stator assembly for a gas turbine engine, comprising:
an arcuate shroud including a shroud pocket formed in a surface wall of the shroud and extending from a flowpath surface of the shroud, the shroud pocket including:
a shroud pocket base defining a depth of the shroud pocket; and
a shroud pocket sidewall extending from the shroud pocket base to the flowpath surface, the shroud pocket sidewall having a shroud slot extending therethrough;
a stator vane insertable into the shroud pocket and including a vane slot extending therethrough, the shroud pocket base defining a depth to which the stator vane may be inserted into the shroud pocket; and
a strap extending through the shroud slot and the vane slot to retain the vane to the shroud.
2. The stator assembly of claim 1 further comprising a volume of potting disposed at the shroud pocket to retain the stator vane thereat.
3. The stator assembly of claim 2 , wherein the potting is a rubber material.
4. The stator assembly of claim 2 , wherein the potting comprises a grommet disposed at the shroud pocket.
5. The stator assembly of claim 1 , wherein the stator vane is inserted in two shroud pockets of two shrouds, with a strap extending through the vane slot and the shroud slot at each shroud of the two shrouds.
6. A stator and case assembly for a gas turbine engine comprising:
a case defining a working fluid flowpath for the gas turbine engine; and
a stator assembly secured at the case, the stator assembly including a plurality of stator segments arranged circumferentially about an engine axis, each stator segment including:
an arcuate shroud including a shroud pocket formed in a surface wall of the shroud and extending from a flowpath surface of the shroud, the shroud pocket including:
a shroud pocket base defining a depth of the shroud pocket; and
a shroud pocket sidewall extending from the shroud pocket base to the flowpath surface, the shroud pocket sidewall having a shroud slot extending therethrough;
a stator vane insertable into the shroud pocket and including a vane slot extending therethrough, the shroud pocket base defining a depth to which the stator vane may be inserted into the shroud pocket; and
a strap extending through the shroud slot and the vane slot to retain the vane to the shroud.
7. The stator and case assembly of claim 6 , further comprising a volume of potting disposed at the shroud pocket to retain the stator vane thereat.
8. The stator and case assembly of claim 7 , wherein the potting is a rubber material.
9. The stator and case assembly of claim 7 , wherein the potting comprises a grommet disposed at the shroud pocket.
10. The stator and case assembly of claim 6 , wherein the stator vane is inserted in two shroud pockets of two shrouds, with a strap extending through the vane slot and the shroud slot at each shroud of the two shrouds.
11. A gas turbine engine, comprising:
a combustor; and
a stator and case assembly in in fluid communication with the combustor, the stator and case assembly including:
a case defining a working fluid flowpath for the gas turbine engine; and
a stator assembly secured at the case, the stator assembly including a plurality of stator segments arranged circumferentially about an engine axis, each stator segment including:
an arcuate shroud including a shroud pocket formed in a surface wall of the shroud and extending from a flowpath surface of the shroud, the shroud pocket including:
a shroud pocket base defining a depth of the shroud pocket; and
a shroud pocket sidewall extending from the shroud pocket base to the flowpath surface, the shroud pocket sidewall having a shroud slot extending therethrough;
a stator vane insertable into the shroud pocket and including a vane slot extending therethrough, the shroud pocket base defining a depth to which the stator vane may be inserted into the shroud pocket; and
a strap extending through the shroud slot and the vane slot to retain the vane to the shroud.
12. The gas turbine engine of claim 11 , further comprising a volume of potting disposed at the shroud pocket to retain the stator vane thereat.
13. The gas turbine engine of claim 12 , wherein the potting is a rubber material.
14. The gas turbine engine of claim 12 , wherein the potting comprises a grommet disposed at the shroud pocket.
15. The gas turbine engine of claim 11 , wherein the stator vane is inserted in two shroud pockets of two shrouds, with a strap extending through the vane slot and the shroud slot at each shroud of the two shrouds.