Bucket assembly for replacing old bucket provided with turbine and method for replacing the same

摘要

A bucket assembly for replacing an old bucket is provided with a turbine and a method for replacing the same. The bucket to be replaced is removed and then the bucket assembly configured of a blade part, first and second dovetail members, and a coupling member is simply assembled in a male dovetail, without sequentially disassembling the already installed buckets though a notch opening upon replacing the damaged bucket among the already installed buckets in a tangential entry type dovetail, thereby shortening replacement time and replacement costs of the bucket assembly and preventing a secondary damage occurring to the rotor or the rotor wheel during the disassembling process.

主权项

1. A bucket assembly for replacing an old bucket provided with a turbine for replacing a plurality of already installed bucket assemblies sequentially inserted in a tangential direction of a rotor through a notch opening formed at a portion of a male dovetail which is formed at the rotor or an outer circumferential surface of a rotor wheel, the bucket assembly comprising:
a blade part having an inside end with respect to a radial direction of the rotor; a first dovetail member having an outside end with respect to a radial direction of the rotor that is coupled with the inside end of the blade part; a second dovetail member having an outside end in the radial direction of the rotor is coupled with the inside end of the blade part in a state in which the second dovetail member faces the first dovetail member; and a coupling member configured to fasten the first dovetail member with the second dovetail member.