| 摘要 |
A unique finger dovetail pin configuration is provided to attach the buckets of a control stage of a turbine to the rotor wheel. More particularly, as an embodiment of the invention, a bore is provided through the center of the pin to form a hollow pin. The primary benefit of providing a hollow pin configuration is that a passage is defined for the axial flow of steam through the dovetail attachment. For a control stage bucket, this axial flow is desirable to minimize the leakage of steam from the space between the first stage nozzle and bucket, and to provide a source of cooling flow to the forward side of the turbine wheel. Another benefit of the hollow pin is to facilitate removal of the pins when servicing of the high pressure rotor is required.
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