Turbine rotor heating, disassembly, handling and reassembly meth

Details Turbine rotor heating, disassembly, handling and reassembly meth Turbine rotor heating, disassembly, handling and reassembly meth

1985-05-07

1986-05-27

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29407, 29447, 29705, 29709, 29720, 219395, 219405, 219406, 219407, 219415, 219442, 414728, 403273, B23K 300, B23P 1102, B23P 1900, F27D 1100

Patent

active

045906530

ABSTRACT:
A turbine rotor disassembly, handling and reassembly apparatus employs a feedback-controlled electric heating oven to rapidly heat a turbine wheel while the rotor shaft is in the horizontal position. An adapter interfaces the wheel to a handling spool whose outboard end is adjusted to slide on the rotor shaft and to provide a fulcrum for supporting the wheel. A handling trolley includes a soft hydraulic system for supporting the weight of the wheel to avoid damaging the precision machined surfaces of the shrink-fit area while the wheel is being withdrawn. The handling apparatus also provides means for upending, or rotating, the removed wheel through 90 degrees to place its axis vertical for facilitating handling. A sensor system senses a radial motion of the wheel to detect clearance and to establish an appropriate fluid pressure to just balance the weight of the wheel and attached parts. The handling system includes means for rotating the wheel slightly during reassembly to align keyways or the like. A technique is included for equalizing shaft heating during reassembly of a turbine rotor by cyclically elevating and lowering the wheel, by orbiting the wheel about the shaft or by holding the wheel in the center of its clearance about the shaft until a shrink fit is established.

REFERENCES:
patent: 2825124 (1958-03-01), Nichols et al.
patent: 3724059 (1973-04-01), Celovsky
patent: 4044442 (1977-08-01), Carlson
patent: 4408382 (1983-10-01), Campbell
patent: 4409731 (1983-10-01), Campbell
patent: 4464826 (1984-08-01), Bair

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