Locking arrangement for radial entry turbine blades

摘要

A locking arrangement for a row of radial entry blades ( 62 ) of a turbo-machine. A closing blade ( 66 ) includes a root portion ( 74 ) having an axial attachment shape ( 78 ) for engagement with an axially oriented slot having an axial attachment shape ( 76 ) formed at the entering slot location ( 34 ) of the radial entry rotor disk ( 56 ). For applications utilizing blades with curved platform faces ( 112 ), a preceding blade ( 108 ) and a following blade ( 110 ) in the row are designed with one curved face for abutting adjacent radial entry blades and one flat face ( 120 ) for abutting the flat closing blade faces ( 116 ). The closing blade ( 84 ) may be designed with a root portion ( 88 ) having two legs ( 90,92 ) that are urged apart by a key ( 86 ) into tight contact with the adjacent blades. A closing blade ( 62 ) substantially identical to the radial entry blades may be affixed in the entering slot location with a connecting member ( 96 ) that has a radially inner portion ( 98 ) having an axial attachment shape and a radially outer portion ( 100 ) having a radial attachment shape. A flaw in a perimeter portion of a radial entry rotor disk ( 56 ) may be repaired without welding by removing the flaw along with adjoining material to form an axial attachment shape in the rotor disk, and then installing closing blade with a complementary axial attachment shape into the repair location.