| 摘要 |
A turbine rotor assembly (32) comprising a turbine rotor (34) and a plurality of circumferentially spaced radially outwardly extending turbine rotor blades (36). The turbine rotor (34) has a rim (38) and a plurality of circumferentially spaced slots (40) provided in the rim (38) of the turbine rotor (34). Each turbine rotor blade (36) has a root (42) and the root (42) of each turbine rotor blade (36) is arranged in a corresponding one of the slots (40) in the rim (38) of the turbine rotor (34). Each of the slots (40) has a chocking device (50) and each chocking device (50) abuts a radially inner surface (52) of the slot (40) and each chocking device (50) abuts a radially inner surface (48) of the root (42) of the corresponding turbine rotor blade (36). Each chocking device (50) comprises a thermally insulating material (54) adjacent the radially inner surface (52) of the slot (40) and each chocking device (50) forming a space (56) between the thermally insulating material (4) and the radially inner surface (48) of the root (42) of the corresponding turbine rotor blade (36). The chocking devices (50) reduce the difference between the thermal response of the region of the turbine rotor (34) adjacent the slots (40) and the remainder of the turbine rotor (34) and therefore reduces the thermal stresses in the region of the turbine rotor (34) adjacent the slots (40) of the turbine rotor (34). |
