Turbine disk interstage seal system
First Claim
1. In a turbine engine of a type having a turbine section including first and second stage disks mounted on a compressor shaft, an interstage seal system comprising:
- an outer, generally cylindrical housing having an outer forward arm engaging said first stage disk and an outer rearward arm engaging said second stage disk, said forward and rearward arm being arcuate in shape in an axial direction, each having a reverse catenary contour, said forward arm and said first stage disk including means forming a bayonet connection therebetween, and means forming an anti-rotation connection therebetween.
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Accused Products
Abstract
A turbine engine of the type having a compressor section, combustor section and high-pressure turbine section in which compressor air is conveyed internally of the compressor and turbine sections to cool the turbine interstage volume, a first stage turbine disk includes a shaft supporting a second stage turbine disk, a turbine interstage seal is secured by boltless engagement to the disks and is prestressed to resist flexure, and the first stage disk carries a forward seal attached by boltless connections. The interstage seal includes a bore having a rearwardly-extending arm engaging the aft shaft in a bayonet connection to prevent deflection of the bore and includes passages to allow air flow around the bore. The forward seal includes radially-extending vanes to convey cooling air along the disk, and is secured by inward and outward bayonet connections, the inward connection including locking pins which are arranged to perform a balancing function.
131 Citations
14 Claims
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1. In a turbine engine of a type having a turbine section including first and second stage disks mounted on a compressor shaft, an interstage seal system comprising:
an outer, generally cylindrical housing having an outer forward arm engaging said first stage disk and an outer rearward arm engaging said second stage disk, said forward and rearward arm being arcuate in shape in an axial direction, each having a reverse catenary contour, said forward arm and said first stage disk including means forming a bayonet connection therebetween, and means forming an anti-rotation connection therebetween. - View Dependent Claims (2, 3)
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4. In a turbine engine of a type having a turbine section including first and second stage disks mounted on a compressor shaft, an interstate seal system comprising:
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an outer, generally cylindrical housing having a forward arm engaging said first stage disk and a rearward arm engaging said second stage disk, said forward arm and said first stage disk including means forming a bayonet connection therebetween, and means forming an anti-rotation connection therebetween; said forward arm including a forwardly-facing axial stop abutting said first stage disk; and
a radially outward-facing radial stop abutting said first stage disk, said axial and radial stop engagements preventing forward axial and outward radial deflection, respectively, of said forward arm;said bayonet connection includes said forward arm having a plurality of radially inward-extending teeth; and
said first stage disk having a plurality of radially outwardly-extending tabs, said tabs being spaced apart from each other and from said first stage disk to receive said teeth between said tabs, and between said tabs and said first stage disk in said bayonet connection, whereby rearward axial movement of said forward arm relative to said first stage disk is prevented; andsaid first stage disk includes at least one blade having a tab projecting rearwardly from a root thereof; and
said forward arm includes forwardly projecting tab means for meshing with said tab. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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12. In a turbine engine of a type having a turbine section including first and second stage disks mounted on a compressor shaft, and interstage seal system comprising:
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an outer, generally cylindrical housing having a forward arm engaging said first stage disk and a rearward arm engaging said second stage disk, said forward arm and said first stage disk including means forming a bayonet connection therebetween, and means forming an anti-rotation connection therebetween; said housing including a web and bore extending radially inwardly between said first and second stage disks; and said bore includes a rearwardly-extending conical arm;
said first stage disk includes a cylindrical aft shaft; and
said conical arm and said aft shaft include means cooperating to form a bayonet connection, whereby axial deflection of said web and bore is prevented. - View Dependent Claims (13, 14)
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Specification