초록 ▼

An improved trap seal for open circuit liquid cooled turbines is disclosed. The trap seal of the present invention includes an annular recess formed in the supply conduit of cooling channels formed in the airfoil of the turbine buckets. A cylindrical insert is located in the annular recesses and has

An improved trap seal for open circuit liquid cooled turbines is disclosed. The trap seal of the present invention includes an annular recess formed in the supply conduit of cooling channels formed in the airfoil of the turbine buckets. A cylindrical insert is located in the annular recesses and has a plurality of axial grooves formed along the outer periphery thereof and a central recess formed in one end thereof. The axial grooves and central recess formed in the cylindrical insert cooperate with the annular recess to define a plurality of S-shaped trap seals which permit the passage of liquid coolant but prohibit passage of gaseous coolant.

대표청구항 ▼

An improved cooling system for a gas turbine of the type including a turbine disc mounted on a shaft rotatably supported in a casing, a plurality of turbine buckets extending radially outward of said disc, each of said buckets including a root portion mounted in said disc, a shank portion extending

An improved cooling system for a gas turbine of the type including a turbine disc mounted on a shaft rotatably supported in a casing, a plurality of turbine buckets extending radially outward of said disc, each of said buckets including a root portion mounted in said disc, a shank portion extending radially outward from said root portion to a platform portion and an airfoil extending radially outward from said platform portion, said cooling system comprising: (a) a plurality of cooling channels formed in the airfoil of each of said buckets for distributing coolant through said airfoils; (b) means for supplying liquid coolant to each of said cooling channels, said means including a plurality of trap seals, each of said trap seals comprising: (1) an annular recess formed in said bucket; and (2) a cylindrical insert located in said recess, said cylindrical insert having a plurality of axial grooves formed along the outer periphery thereof and a central recess formed in one end thereof, said axial groove and said central recess cooperating with said annular recess to define a plurality of S-shaped trap seals which permit the passage of liquid coolant but prohibit the passage of gaseous coolant.