Air turbine starter
An air turbine starter for starting an engine includes a starter housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet. The air turbine starter can include a rotatable turbine member having a central hub defining a platform and at least one blade extending radially from the platform. The air turbine starter can also include a blade cutter.
1. An air turbine starter for starting an engine, comprising:
a starter housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet;
a rotatable turbine member located within the starter housing and comprising a central hub defining a platform, and at least one blade extending radially from the platform between a root and a tip, with the root and tip defining an annular swept area during normal rotational operation; and
a blade cutter located downstream of the rotatable turbine member and in registry with the annular swept area, wherein the at least one blade has a blade length defined between the root and the tip, and wherein the blade cutter has a cutting edge radially spaced from the root to define a cutting distance of 0-40% of the blade length.
2. The air turbine starter of claim 1 , wherein the blade cutter comprises a disk with the cutting edge extending at least axially from the disk.
3. The air turbine starter of claim 1 , wherein the at least one blade defines an axial chord length and the blade cutter defines a cutter length less than the axial chord length.
4. The air turbine starter of claim 1 , further comprising a containment ring positioned radially outward of the rotatable turbine member.
5. An air turbine starter for starting an engine, comprising:
a starter housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet;
a rotatable turbine member comprising a central hub defining a platform, and at least one blade extending radially from the platform between a root and a tip; and
a blade cutter having a cutting edge, wherein the cutting edge confronts the blade at or between the root and the tip.
6. The air turbine starter of claim 5 , wherein the cutting edge is radially positioned closer to the root than the tip.
7. The air turbine starter of claim 5 , wherein the blade cutter extends radially into the flow path.
8. The air turbine starter of claim 5 , further comprising a seal located adjacent the turbine member and coupled to the blade cutter.
9. The air turbine starter of claim 5 , wherein the blade cutter comprises a disk, and wherein a cutting edge axially extends from the disk.
10. The air turbine starter of claim 9 , further comprising a blade length defined between the root and the tip, with the cutting edge radially spaced from the root between 0-40% of the blade length.
11. The air turbine starter of claim 5 , wherein the blade defines an axial chord length and the blade cutter defines a cutter length less than the axial chord length.
12. The air turbine starter of claim 5 , wherein the blade defines an axial chord length and the blade cutter is configured to form a cut in the blade defining a cut depth for removing the at least one blade, wherein the cut depth is a nonzero value between 0-40% of the axial chord length.
13. The air turbine starter of claim 5 , further comprising a containment ring positioned radially outward of the rotatable turbine member.
14. An air turbine starter for starting an engine, comprising:
a starter housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet;
a rotatable turbine member comprising a central hub defining a platform, and at least one blade extending radially from the platform between a root and a tip, and also extending between a leading edge and a trailing edge to define an axial chord length;
a blade cutter having a cutting edge confronting the at least one blade proximate the root, wherein the blade cutter defines an axial cutter length less than the axial chord length; and
wherein the blade cutter is configured to form a cut in the blade defining a cut depth for removing the at least one blade, wherein the cut depth is a nonzero value between 0-40% of the axial chord length.
15. The air turbine starter of claim 14 , wherein the blade cutter extends radially into the flow path.
16. The air turbine starter of claim 14 , wherein the blade cutter comprises a disk, and wherein a cutting edge axially extends from the disk.
17. The air turbine starter of claim 14 , further comprising a containment ring positioned radially outward of the rotatable turbine member.
18. The air turbine starter of claim 14 , further comprising a seal located adjacent the rotatable turbine member and coupled to the blade cutter.
19. An air turbine starter for starting an engine, comprising:
a starter housing defining an inlet, an outlet, and a flow path extending between the inlet and the outlet;
a rotatable turbine member located within the starter housing and comprising a central hub defining a platform, and at least one blade extending radially from the platform between a root and a tip, with the root and tip defining an annular swept area during normal rotational operation; and
a blade cutter located downstream of the rotatable turbine member and in registry with the annular swept area;
wherein the at least one blade defines an axial chord length and the blade cutter is configured to form a cut in the at least one blade defining a cut depth for removing the at least one blade, wherein the cut depth is a nonzero value between 0-40% of the axial chord length.
20. The air turbine starter of claim 19 , wherein the blade cutter comprises a disk, and wherein a cutting edge axially extends from the disk.