Structural frame for a turbomachine

1. A structural frame, an intermediate frame, or an exhaust frame, for a turbomachine, comprising:

inner and outer coaxial rings; and

radial arms interconnecting the rings, each of the radial arms comprising a soleplate at an end of the radial arm, the soleplate extending circumferentially and including first and second radial flanges disposed at first and second circumferential ends of the soleplate and extending axially from an upstream end to a downstream end of the sole plate, an upstream wall disposed at an upstream end of the soleplate and extending circumferentially from the first circumferential end to the second circumferential end, and a downstream wall disposed at a downstream end of the soleplate and extending circumferentially from the first circumferential end to the second circumferential end,

wherein at least one of the rings includes a plurality of cylinder portions extending circumferentially and having circumferential ends that include radial flanges that are fastened by bolting to corresponding radial flanges of the soleplate of each of the radial arms, and

wherein a circumferential distance between the first and second circumferential ends of each soleplate is less than a circumferential distance between the circumferential ends of each cylinder portion.

2. A frame according to claim 1 , further comprising an intermediate ring arranged between the inner and outer rings and having the radial arms passing therethrough, the intermediate ring including upstream and downstream radial walls disposed at upstream and downstream ends of the intermediate ring.

3. A frame according to claim 2 , wherein the intermediate ring includes a plurality of elements that are fastened together by bolting.

4. A frame according to claim 2 , wherein each radial arm includes an inner part connecting together the inner and intermediate rings, and an outer part connecting together the intermediate and outer rings.

5. A frame according to claim 4 , wherein the inner and intermediate rings and the inner parts of the radial arms are made as a single piece.

6. A frame according to claim 4 , wherein a radially-inner end of the outer part of each arm includes a base bolted to a corresponding base at an outer end of the inner part of the radial arm extending between the upstream and downstream radial walls of the intermediate ring.

7. A frame according to claim 4 , wherein a radially-outer end of the outer part of each arm includes the soleplate, the soleplate including a tubular projection having orifices that communicates with an inside of the outer part of the arm.

8. A frame according to claim 1 , wherein the inner and outer rings and the radial arms are made out of different materials.

9. A frame according to claim 1 , wherein the inner and outer rings and the radial arms are made using different techniques selected from casting, forging, and powder metallurgy.

10. A frame according to claim 1 , having a diameter greater than 110 cm.

11. A turbomachine, a turbojet, or a turboprop, comprising a frame according to claim 1 .

12. A structural frame, an intermediate frame, or an exhaust frame, for a turbomachine, comprising:

inner and outer coaxial rings; and

radial arms interconnecting the rings,

wherein at least one of the rings includes a plurality of cylinder portions extending circumferentially and having circumferential ends that include radial flanges that are fastened by bolting to corresponding radial flanges of the radial arms,

wherein the outer ring includes the plurality of cylindrical portions with the radial flanges at each of the circumferential ends of each of the cylinder portions of the outer ring, the cylindrical portions presenting a channel section that are open towards an outside of the turbomachine,

wherein a radially outer end of each of the radial arms includes a soleplate extending circumferentially, the soleplate including first and second radial flanges disposed at first and second circumferential ends of the soleplate and extending axially from an upstream end to a downstream end of the sole plate, an upstream wall disposed at an upstream end of the soleplate and extending circumferentially from the first circumferential end to the second circumferential end, and a downstream wall disposed at a downstream end of the soleplate and extending circumferentially from the first circumferential end to the second circumferential end,

wherein the first radial flange at the first circumferential end of the soleplate is fastened by bolting to a radial flange of a first cylinder portion, and the second radial flange at the second circumferential end of the soleplate is fastened by bolting to a radial flange of a second cylinder portion, and

wherein a circumferential distance between the first and second circumferential ends of each soleplate is less than a circumferential distance between the circumferential ends of each cylinder portion.

13. A frame according to claim 12 , wherein the soleplate includes a tubular projection having orifices that communicates with an inside of the arm.

14. A structural frame, an intermediate frame, or an exhaust frame, for a turbomachine, comprising:

an inner ring;

an outer ring coaxial with the inner ring;

an intermediate ring disposed between and coaxial with the inner and outer rings, the intermediate ring including upstream and downstream radial walls disposed at upstream and downstream ends of the intermediate ring; and

radial arms interconnecting the rings,

wherein the inner, intermediate, and outer rings are each made up of a plurality of cylinder portions with circumferential ends including radial flanges,

wherein each radial arm includes an inner soleplate at an inner end of the radial arm, an outer soleplate at an outer end of the radial arm, and an intermediate soleplate located along the arm between the inner soleplate and the outer soleplate, the inner, intermediate, and outer soleplates each extending circumferentially and circumferential ends of each of the inner, intermediate, and outer soleplates including radial flanges,

wherein the radial flanges of each of the inner, intermediate, and outer soleplates are fastened by bolting to the radial flanges of the radial flanges of the cylinder portions of the inner, intermediate, and outer rings, respectively, and

wherein a circumferential distance between the circumferential ends of each of the inner, intermediate, and outer soleplates is less than a circumferential distance between the circumferential ends of each of the cylinder portions of the inner, intermediate, and outer rings, respectively.

15. A frame according to claim 14 , wherein each radial arm is made as a single piece.

16. A frame according to claim 14 , wherein the outer soleplate includes a tubular projection having orifices that communicates with an inside of the arm.