| 摘要 |
An assembly for sealing the root portions of gas turbine rotor blades of the side entry type into a rotor. The assembly also provides cooling for the blades. A radially directed three-sided channel disposed on the upstream side of the rotor near its periphery forces cooling fluid radially outward to a chamber beneath each blade root. The rotor, when rotating, causes the channel to act as a pump due to centrifugal force imparted to the cooling fluid. The coolant fluid is forced out the channel and into the chamber, then the coolant fluid is discharged radially through the blade root. A chamber sealing plate prevents axial leakage of the coolant past the downstream side of the blade root. The chamber sealing plate is fitted into a groove on the periphery of the rotor radially inwardly of and near the downstream end of the blade root. The sealing plate is notched, and interlocks with a corresponding tab in the downstream base of the blade root, which prevents the seal plates from moving circumferentially during turbine operation. The seal plate is further restrained axially by contact with an exhaust sealing and locking plate that is mounted in another peripheral groove downstream of the chamber sealing plate. The exhaust plate seals the downstream side of the blade entry channels, and locks the blades into the rotor. |
