Method of salvaging stationary blades of a steam turbine

Details Method of salvaging stationary blades of a steam turbine Method of salvaging stationary blades of a steam turbine

B - Operations, Transporting

23

P

26/150

B23P 6/00 (2006.01) B23P 11/00 (2006.01) F01D 9/04 (2006.01)

Patent

CA 1303339

- 22 - 54,210 ABSTRACT OF THE DISCLOSURE A method of salvaging stationary blades of a steam turbine cylinder includes tack welding abutting stationary blade platforms, cutting stationary blade roots out of the steam turbine cylinder, machining a side of the root and platform for each stationary blade to reduce thickness along the side and mounting the stationary blades in a new cylinder having mounting grooves for each row of stationary blades. Each mounting groove has an annular recess formed in a sidewall thereof and the cylinder has a sloping surface which faces a machined area of the root and platform of the stationary blades. The space between the sloped surface and the machined area provides access for a piece of caulking material and a caulking tool, whereby the caulking material is deformed to make a key connection between the cylinder and the stationary blade roots.

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