초록 ▼

A turbine module for a gas turbine engine includes at least an annular distributor and a turbine rotor inside a casing, where the annular distributor includes a plurality of elements in the form of a ring sector, of which a first part supports fixed blades positioned radially towards the turbine axi

A turbine module for a gas turbine engine includes at least an annular distributor and a turbine rotor inside a casing, where the annular distributor includes a plurality of elements in the form of a ring sector, of which a first part supports fixed blades positioned radially towards the turbine axis, and a second part forms a seal with the tips of the turbine rotor blades. The elements in the form of a ring sector are held inside the casing by attachment resources.

대표청구항 ▼

The invention claimed is: 1. A turbine module for a gas turbine engine comprising: an annular distributor ring; and a turbine rotor inside a casing, wherein the annular distributor includes a plurality of elements in the form of a ring sector, of which a first part supports a plurality of fixed bla

The invention claimed is: 1. A turbine module for a gas turbine engine comprising: an annular distributor ring; and a turbine rotor inside a casing, wherein the annular distributor includes a plurality of elements in the form of a ring sector, of which a first part supports a plurality of fixed blades positioned radially between the first part and an internal platform, said first part includes a radially extending portion with a first radial support surface which abuts against a radial support of said casing, and a second part forms a seal with tips of turbine rotor blades, wherein said elements in the form of a ring sector are held inside the casing by first and second attachment units which attach said elements inside said casing, wherein said first attachment unit includes an axial hook attached to the casing and a pair of axial hooks attached to said one element, wherein said second attachment unit includes an axially oriented finger that fits between two sectors of another distributor located downstream of said annular distributor such that said axially oriented finger forms an anti-rotation locking device for said one element, wherein said plurality of fixed blades positioned radially between the first part and the internal platform, said first and second parts of said ring sector, and said internal platform are all formed of a single cast part thereby forming a modular element, wherein a first hook of said pair of axial hooks abuts said axial hook attached to the casing and a second hook of said pair of axial hooks abuts an abradable material of an adjacent element, wherein said first radial support surface is a free end of said radially extending portion which extends radially from said first part of said one element and is located downstream of said pair of axial hooks and upstream of said axially oriented finger, and wherein said second part of said one element extends downstream from said radially extending portion. 2. A module according to claim 1, comprising at least two consecutive turbine rotor stages separated by a distributor ring. 3. A module according to claim 1, wherein said first attachment unit is located upstream on the first part of said element in the form of a ring sector. 4. A module according to claim 1, wherein the first attachment unit includes said axial hook on the casing, engaging with said pair of axial hooks attached to said one element in such a way that a downstream end of a sealing ring sector of the rotor located upstream of said one element is held between the axial hooks. 5. A module according to claim 1, wherein at least two turbine rotors form a monoblock assembly. 6. A module according to claim 1, wherein plates of abradable material are attached to said second part of the element. 7. A module according to claim 1, wherein said distributor is positioned between two turbine rotor blades, wherein said two turbine rotor blades form a monoblock assembly. 8. A turbine module according to claim 7, wherein said monoblock assembly includes a monoblock ferule between said two turbine rotor blades, and wherein said monoblock ferule and said two turbine rotor blades form a single block welded together. 9. A turbine module according to claim 8, wherein said monoblock ferule includes at least one sealing lip oriented transversally with respect to an axis of said gas turbine engine and facing said distributor so as to form a seal with said distribution. 10. A module according to claim 1, wherein said ring sector comprises a second radial support surface which abuts against a second radial support of said casing, wherein said second radial support surface is located downstream of said first radial support surface and upstream of said axially oriented finger. 11. A module according to claim 10, wherein said ring sector further comprises a radial lug forming an axial end-stop, said radial lug being located downstream of said second radial support surface and upstream of said axially oriented finger. 12. A module according to claim 11, wherein a radius of said second radial support is greater than a radius of said first radial support, and the radius of said first radial support is greater than a radius of said axial hook attached to said casing. 13. A turbine comprising a plurality of modules connected to each other, each module being according to the module of claim 1. 14. A turbine according to claim 13, wherein said modules are connected to each other with axial hooks. 15. A module according to claim 1, wherein a radial position along said radially extending portion from which said second part of said one element extends downstream is closer to said first radial support surface than said fixed blade. 16. A turbine module for a gas turbine engine comprising: an annular distributor ring; and a turbine rotor inside a casing, wherein the annular distributor includes a plurality of elements in the form of a ring sector, of which a first part supports a plurality of fixed blades positioned radially between the first part and an internal platform, and a second part forms a seal with tips of turbine rotor blades, wherein said elements in the form of a ring sector are held inside the casing by first and second attachment units which attach said elements inside said casing, wherein said first attachment unit includes an axial hook attached to the casing and a pair of axial hooks attached to said one element, wherein said second attachment unit includes an axially oriented finger that fits between two sectors of another distributor located downstream of said annular distributor such that said axially oriented finger forms an anti-rotation locking device for said one element, wherein said plurality of fixed blades positioned radially between the first part and the internal platform, said first and second parts of said ring sector, and said internal platform are all formed of a single cast part thereby forming a modular element, wherein a first hook of said pair of axial hooks abuts said axial hook attached to the casing and a second hook of said pair of axial hooks abuts an abradable material of an adjacent element, and wherein a downstream end of said second part of said one element includes a third axial hook that engages, with a fourth axial hook attached to said casing, into a second pair of axial hooks attached to a downstream element located downstream of said one element.