Double walled tube and manufacture thereof
Aspects of the disclosure are directed to a tube assembly comprising: a first tube having a radial exterior surface, a second tube composed of a plurality of segments, the first tube co-axially nested within the second tube, at least a first spacer coupled to the first tube, and a second spacer coupled to the at least a first spacer, where a first segment of the plurality of segments is coupled to a first axial end of the second spacer, and a second segment of the plurality of segments is coupled to a second axial end of the second spacer.
1. A tube assembly comprising:
a first tube having a radial exterior surface;
a second tube composed of a plurality of segments, the first tube co-axially nested within the second tube;
at least a first spacer coupled to the first tube; and
a second spacer coupled to the at least a first spacer,
wherein a first segment of the plurality of segments is coupled to a first axial end of the second spacer,
wherein a second segment of the plurality of segments is coupled to a second axial end of the second spacer,
wherein the at least a first spacer includes a first inner spacer and a second inner spacer, and
wherein a first center of the first inner spacer is aligned with a second center of the second inner spacer relative to an axial length of the first tube.
2. The tube assembly of claim 1 , further comprising:
an end fitting coupled to the first tube.
3. The tube assembly of claim 2 , wherein the second tube is coupled to the end fitting.
4. The tube assembly of claim 1 , further comprising:
a first ferrule coupled to the first tube.
5. The tube assembly of claim 4 , further comprising:
a second ferrule coupled to the second tube.
6. The tube assembly of claim 5 , wherein a third segment of the plurality of segments is coupled to the second ferrule.
7. The tube assembly of claim 1 , wherein the first center and the second center are separated from one another by approximately one-hundred eighty degrees relative to a circumference of the first tube.
8. The tube assembly of claim 1 , wherein a first structure of the first inner spacer is separated from a second structure of the second inner spacer by a non-zero value of distance.
9. The tube assembly of claim 1 , wherein the first tube is configured to convey a fluid.
10. The tube assembly of claim 9 , wherein the fluid includes at least one of oil, fuel, hydraulic fluid, or air.
11. The tube assembly of claim 9 , wherein the second tube is configured to convey a second fluid.
12. The tube assembly of claim 1 , wherein the tube assembly is mounted to an engine of an aircraft.
13. A method comprising:
sliding a plurality of outer tube segments onto an inner tube;
using an outer spacer to separate a first and a second of the plurality of outer tube segments;
attaching at least one inner spacer to the inner tube;
attaching the outer spacer to the at least one inner spacer;
attaching the outer spacer to the first outer tube segment; and
attaching the outer spacer to the second outer tube segment,
wherein the at least one inner spacer includes a first inner spacer and a second inner spacer, and
wherein a first center of the first inner spacer is aligned with a second center of the second inner spacer relative to an axial length of the inner tube.
14. The method of claim 13 , further comprising:
attaching the inner tube to an end fitting.
15. The method of claim 14 , further comprising:
attaching the first outer tube segment to the end fitting.
16. The method of claim 13 , further comprising:
attaching an inner ferrule to the inner tube.
17. The method of claim 16 , further comprising:
attaching an outer ferrule to the second outer tube segment.
18. The method of claim 16 , further comprising:
attaching an outer ferrule to a third outer tube segment of the plurality of outer tube segments.
19. A tube assembly comprising:
a first tube having a radial exterior surface;
a second tube composed of a plurality of segments, the first tube co-axially nested within the second tube;
at least a first spacer coupled to the first tube; and
a second spacer coupled to the at least a first spacer,
wherein a first segment of the plurality of segments is coupled to a first axial end of the second spacer,
wherein a second segment of the plurality of segments is coupled to a second axial end of the second spacer,
wherein the at least a first spacer includes a first inner spacer and a second inner spacer, and
wherein a first structure of the first inner spacer is separated from a second structure of the second inner spacer by a non-zero value of distance.