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Turbine blade repair

  • US 4,611,744 A
  • Filed: 06/20/1983
  • Issued: 09/16/1986
  • Est. Priority Date: 06/23/1982
  • Status: Expired due to Fees
First Claim
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1. A method of repairing a turbine blade, said method comprising the steps of:

  • (a) applying heating means to selected areas of a turbine blade to be repaired;

    (b) heating said areas of the turbine blade to desired temperatures;

    (c) carrying out a repair step on said blade, said repair step involving the application of substantial thermal energy to the blade;

    (d) controlling said heating means during said repair step so as to heat said selected areas in a manner to reduce forces acting upon the blade due to the occurrence of thermal expansion in the blade resulting from application of said substantial thermal energy;

    (e) said heating means being positioned so that the heat transferred to the turbine blade tends to cause distortion of said blade in a direction substantially opposite to the distortion which is likely to be caused by the repair step involving the application of said substantial thermal energy;

    (f) controlling said heating means after said repair step so as to maintain said turbine blade at a predetermined temperature for a predetermined length of time.

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