Method and apparatus for turbine blade rehabilitation
AssigneeOntario Hydro
InventorsM. K. C. Ng, J. T. C. Lee, G. C. Poon, L. S. Pullia, J. W. Prince, W. J. Crowell
Life of this patent
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Abstract
A method and apparatus for removing erosion shields from the blades of a turbine includes a part for gripping the turbine blade, a part for heating the erosion shield to detach it from the blade, and a part for removing the shield including a pneumatic cylinder actuating a stripping arm once sufficient heat has been applied to the shield to detach it from the blade.
Claims12
A method of removing a shield affixed to a turbine blade by a brazing material comprising the steps of
- attaching to the blade a shield stripping apparatus comprising means for gripping the blade, means for heating the brazing material, and means for removing the shield attached to the gripping means comprising movable shield engaging means for engaging the shield and means for moving the shield engaging means to strip the shield from the blade,
- heating the brazing material,
- determining when the brazing material is sufficiently hot to permit detachment of the shield from the blade, and
- detaching the shield from the blade.
A shield stripping apparatus for removing a shield affixed to a turbine blade by a brazing material comprising
- means for gripping the blade,
- means for heating the brazing material, and
- means for removing the shield attached to the gripping means, comprising movable shield engaging means for engaging the shield and means for moving the shield engaging means to detach the shield from the blade after sufficient heat has been generated to melt the brazing material.
Dependencies are inferred from the claim text.