초록 ▼

A bearing support housing for a gas turbine engine includes: an annular mounting flange; a first bearing cage including: an annular first bearing support ring; and an annular array of axially-extending first spring arms interconnecting the first bearing support ring and the mounting flange; and a se

A bearing support housing for a gas turbine engine includes: an annular mounting flange; a first bearing cage including: an annular first bearing support ring; and an annular array of axially-extending first spring arms interconnecting the first bearing support ring and the mounting flange; and a second bearing cage including: an annular second bearing support ring; and an annular array of axially-extending second spring arms interconnecting the second bearing support ring and the mounting flange, the second spring arms defining spaces therebetween. The first spring arms are received between the second spring arms, and the bearing cages are sized so as to permit independent flexing motion of the first and second spring arms.

대표청구항 ▼

1. A monolithic bearing support housing for a gas turbine engine, comprising: a singular annular mounting flange;a first bearing cage comprising: an annular first bearing support ring; andan annular array of axially-extending first spring arms interconnecting the first bearing support ring and the m

1. A monolithic bearing support housing for a gas turbine engine, comprising: a singular annular mounting flange;a first bearing cage comprising: an annular first bearing support ring; andan annular array of axially-extending first spring arms interconnecting the first bearing support ring and the mounting flange; anda second bearing cage comprising: an annular second bearing support ring; andan annular array of axially-extending second spring arms interconnecting the second bearing support ring and the mounting flange, the second spring arms defining spaces therebetween;wherein the first bearing support ring extends axially and is disposed parallel to the annular array of first spring arms and located radially inside the annular array of first spring arms, and wherein forward and aft axial ends of the first bearing support ring lie within forward and aft axial ends of the annular array of first spring arms, and the first spring arms are received between the second spring arms, and the bearing cages are sized so as to permit independent flexing motion of the first and second spring arms. 2. The bearing support housing of claim 1 wherein each of the first and second spring arms extends axially from an aft face of the mounting flange. 3. The bearing support housing of claim 1 wherein each of the first spring arms includes: an axially-extending portion joining the mounting flange; anda radially-inwardly-extending portion joining the first bearing support ring. 4. The bearing support housing of claim 3 wherein: each of the second spring arms includes: an axially-extending portion joining the mounting flange; anda radially-inwardly-extending portion joining the second bearing support ring; andwherein an axial gap is defined between the first bearing support ring and the radially-inwardly-extending portions of the second spring arms. 5. The bearing support housing of claim 4 wherein the second bearing support ring extends axially away from the second spring arms. 6. The bearing support housing of claim 1 wherein the mounting flange has a plurality of mounting holes formed therethrough. 7. The bearing support housing of claim 1 wherein at least one of the bearing support rings includes a cylindrical inner surface. 8. The bearing support housing of claim 1 wherein at least one of the bearing support rings includes a bearing stop lip. 9. The bearing support housing of claim 1 wherein the first and second spring arms are arranged such that a first gap between each first spring arm and the adjacent spring arm on one side is less than a second gap between the same one of the first spring arms and the adjacent spring arm on the other side. 10. A monolithic bearing assembly for a gas turbine engine, comprising: a singular annular mounting flange secured to a stationary member of the engine;a first bearing cage comprising: an annular first bearing support ring; andan annular array of axially-extending first spring arms interconnecting the first bearing support ring and the mounting flange;a rolling-element first bearing mounted in the first bearing support ring;a second bearing cage comprising: an annular second bearing support ring; andan annular array of axially-extending second spring arms interconnecting the second bearing support ring and the mounting flange, the second spring arms defining spaces therebetween;a rolling-element second bearing mounted in the second bearing support ring; anda shaft mounted in the first and second bearings;wherein the first bearing support ring extends axially and is disposed parallel to the annular array of first spring arms and located radially inside the annular array of first spring arms, and wherein forward and aft axial ends of the first bearing support ring lie within forward and aft axial ends of the annular array of first spring arms, and the bearing cages are sized so as to permit independent flexing motion of the first and second spring arms. 11. The bearing assembly housing of claim 10 wherein each of the first and second spring arms extends axially from an aft face of the mounting flange. 12. The bearing assembly of claim 10 wherein each of the first spring arms includes: an axially-extending portion joining the mounting flange; anda radially-inwardly-extending portion joining the first bearing support ring. 13. The bearing assembly of claim 12 wherein: each of the second spring arms includes: an axially-extending portion joining the mounting flange; anda radially-inwardly-extending portion joining the second bearing support ring; andwherein an axial gap is defined between the first bearing support ring and the radially-inwardly-extending portions of the second spring arms. 14. The bearing assembly of claim 13 wherein the second bearing support ring extends axially away from the second spring arms. 15. The bearing assembly of claim 13 wherein the generally axially-extending portion of the second bearing support ring includes a cylindrical outer surface. 16. The bearing assembly of claim 15 further comprising a stationary damper housing surrounding the second bearing support ring; wherein the damper housing and the second bearing support ring cooperatively define an oil film damper. 17. The bearing assembly of claim 10 wherein the mounting flange has a plurality of mounting holes formed therethrough. 18. The bearing assembly of claim 17 wherein the mounting flange is secured to the stationary structure by a plurality of fasteners passing through mounting holes formed in the mounting flange. 19. The bearing assembly of claim 10 wherein at least one of the bearing support rings includes a cylindrical inner surface. 20. The bearing assembly of claim 10 wherein at least one of the bearing support rings includes a bearing stop lip. 21. The bearing assembly of claim 10 wherein the first and second spring arms are arranged such that a first gap between each first spring arm and the adjacent spring arm on one side is less than a second gap between the same one of the first spring arms and the adjacent spring arm on the other side.