Seal assembly for use in gas turbine engines

1. A seal housing for a seal assembly, the seal housing comprising:

an aft flange;

a forward wall spaced apart axially from the aft flange;

an outer diameter (OD) ring coupled to the aft flange, the OD ring disposed forward of the aft flange and comprising a radially inner surface;

an inner diameter ring (ID) ring spaced apart radially from the OD ring, the ID ring extending axially aft from the forward wall; and

a stopper extending radially inward from the radially inner surface of the OD ring, the stopper configured to interface with a monobloc seal of the seal assembly, the stopper disposed radially outward from the ID ring, the stopper spaced apart axially from the forward wall, wherein:

the stopper further comprises a circumferential stopper portion and an axial stopper portion,

the circumferential stopper portion is configured to restrain a circumferential movement of the monobloc seal during operation of a gas-turbine engine, and

the axial stopper portion is configured to restrain an axial movement of the monobloc seal during an assembly of the seal assembly.

2. The seal housing of claim 1 , wherein the circumferential stopper portion includes a circumferential stopping surface extending from the radially inner surface of the OD ring to a stopper radially inner surface of the stopper.

3. The seal housing of claim 2 , wherein the axial stopper portion extends circumferentially from the circumferential stopper portion.

4. The seal housing of claim 3 , wherein the OD ring comprises an aft axial surface, and wherein the axial stopper portion is disposed aft of the aft axial surface of the OD ring.

5. The seal housing of claim 1 , wherein the seal housing is monolithic.

6. A seal assembly for use in a main bearing shaft compartment of a gas-turbine engine, the seal assembly comprising:

a seal housing comprising:

an aft flange;

a forward wall spaced apart axially from the aft flange;

an outer diameter (OD) ring coupled to the aft flange, the OD ring disposed forward of the aft flange and comprising a radially inner surface;

an inner diameter ring (ID) ring spaced apart radially from the OD ring, the ID ring extending axially aft from the forward wall; and

a stopper extending radially inward from the radially inner surface of the OD ring, the stopper, wherein:

the stopper is configured to restrain a circumferential movement of the monobloc seal, and

the stopper is configured to restrain an axial movement of the monobloc seal;

a monobloc seal disposed radially inward of the OD ring; and

a secondary seal disposed radially inward of the monobloc seal.

7. The seal assembly of claim 6 , wherein the stopper further comprises a circumferential stopper portion and an axial stopper portion, and wherein the monobloc seal further comprises a radial protrusion and a main body, the radial protrusion extending radially outward from the main body and configured to interface with the circumferential stopper portion and the axial stopper portion.

8. The seal assembly of claim 7 , wherein the circumferential stopper portion includes a circumferential stopping surface extending from the radially inner surface of the OD ring to a stopper radially inner surface of the stopper.

9. The seal assembly of claim 8 , wherein the axial stopper portion extends circumferentially from the circumferential stopper portion.

10. The seal assembly of claim 9 , wherein the OD ring comprises an aft axial surface, and wherein the axial stopper portion is disposed aft of the aft axial surface of the OD ring.

11. The seal assembly of claim 6 , wherein the seal housing is monolithic.

12. A gas-turbine engine, comprising:

a main shaft bearing compartment comprising:

a seal housing comprising:

an aft flange;

a forward wall spaced apart axially from the aft flange;

an outer diameter (OD) ring coupled to the aft flange, the OD ring disposed forward of the aft flange and comprising a radially inner surface;

an inner diameter ring (ID) ring spaced apart radially from the OD ring, the ID ring extending axially aft from the forward wall; and

a stopper extending radially inward from the radially inner surface of the OD ring, the stopper, wherein:

the stopper is configured to restrain a circumferential movement of the monobloc seal, and the stopper is configured to restrain an axial movement of the monobloc seal;

a monobloc seal comprising a nose, the monobloc seal disposed radially inward of the OD ring, the nose configured to interface with a seal seat of a shaft for rotation about a central longitudinal axis of the gas-turbine engine; and

a secondary seal disposed radially inward of the monobloc seal.

13. The gas-turbine engine of claim 12 , wherein the stopper further comprises a circumferential stopper portion and an axial stopper portion, and wherein the monobloc seal further comprises a radial protrusion and a main body, the radial protrusion extending radially outward from the main body and configured to interface with the circumferential stopper portion and the axial stopper portion.

14. The gas-turbine engine of claim 13 , wherein the circumferential stopper portion includes a circumferential stopping surface extending from the radially inner surface of the OD ring to a stopper radially inner surface of the stopper.

15. The gas-turbine engine of claim 14 , wherein the axial stopper portion extends circumferentially from the circumferential stopper portion.

16. The gas-turbine engine of claim 15 , wherein the OD ring comprises an aft axial surface, and wherein the axial stopper portion is disposed aft of the aft axial surface of the OD ring.

17. The gas-turbine engine of claim 13 , wherein the circumferential stopper portion is configured to restrain the circumferential movement of the monobloc seal during operation of the gas-turbine engine.

18. The gas-turbine engine of claim 12 , wherein the seal housing is monolithic.