Title:
TURBINE BLADE REPAIR METHOD
Document Type and Number:
Japanese Patent JP2017120052
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To successfully remove water soluble scale attached to a turbine blade, which has an internal cooling passage to circulate a cooling medium therein, through a simple method before the turbine blade is subjected to a thermal treatment in a turbine blade repair process.SOLUTION: In a turbine blade repair method, an attachment cleaning process (scale cleaning process) is executed, before a turbine blade is subjected to a thermal treatment to remove residual stress, in a manner that repeats the following treatments at least once: an ultrasonic wave cleaning treatment (Steps S22 and S25) to clean a turbine blade by immersing the same in a water tank with ultrasonic waves conducted therethrough; and a pressurized water cleaning treatment (Steps S23 and S26) to inject pressurized water into an internal cooling passage after the ultrasonic wave cleaning treatment.SELECTED DRAWING: Figure 4
Inventors:
KAMIMURA YOSHIHISA
INOUE YOSHIYUKI
INOUE YOSHIYUKI
Application Number:
JP2015256926A
Publication Date:
July 06, 2017
Filing Date:
December 28, 2015
Export Citation:
Assignee:
MITSUBISHI HITACHI POWER SYS
International Classes:
F02C7/00; F01D5/18; F01D9/02; F01D25/00
Attorney, Agent or Firm:
Sakai International Patent Office