Method of assembling a turbine runner situated in a water passag

Details Method of assembling a turbine runner situated in a water passag Method of assembling a turbine runner situated in a water passag

1998-01-07

2000-01-25

Cuda, I.

Metal working

Method of mechanical manufacture

Impeller making

298892, B23P 1500

Patent

active

060166002

ABSTRACT:
A method of assembling a turbine runner while it remains situated in a water passageway. The turbine runner comprises a hub having a longitudinal axis, spaced apart outer and inner surfaces defining a cavity, and a corresponding plurality of blades pivotally connected to the hub. Each blade has a trunnion and is supported in rotation by an associated blade support assembly including at least one trunnion bushing. The cavity substantially encloses the support assemblies. The method comprises the steps of assembling a maintenance platform in the water passageway below the runner, installing for at least one of the blades a new trunnion bushing in the associated blade support assembly, and removing the maintenance platform from the water passageway. The hub has an inner hub for supporting the trunnion bushing, and the inner hub may be split into upper and lower inner hubs which may be uncoupled for installing the new trunnion bushing. The runner is surrounded by a discharge ring for directing a flow of water past the runner blades. The discharge ring may include a pocket configured to receive a distal end of one blade. The blade may be slid outwardly into the pocket to obtain additional working room for installing the new trunnion bushing.

REFERENCES:
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Drawing No. 4296-KK-1, dated Oct. 9, 1981, for Runner Hub Assembly-Sect.
Drawing No. 4296-KM-1, dated Feb. 3, 1982, for Runner Hub Assembly-Plan.
Drawing No. 4065-BPO-2, dated Oct. 27, 1982, for Runner Support Arrangement.
Drawing No. 4065-BPJ-1, dated Oct. 5, 1982, for Procedure To Open Blade Removal Hatch.
Drawing No. 4065-BKP-1, dated Oct. 11, 1982, for Procedure To Close Blade Removal Hatch.
Drawing No. 4460-PM-1, dated Jun. 5, 1982, for Aswan II Distributor Section Turbine.
Drawing No. 4460-PN-1, dated Aug. 6, 1982, for Aswan II Distributor Plan Turbine.
Drawing No. 4065-BQG-4, Sheet 1 of 2, dated Nov. 23, 1982, for Procedure to Close Blade Removal Hatch.
Drawing No. 4065-BQG-4, Sheet 2 of 2, dated Nov. 23, 1982, for Procedure to Close Blade Removal Hatch.
Drawing No. 4065-BQF-4, Sheet 1 of 2, dated Nov. 23, 1982, for Procedure to Open Blade Removal Hatch.
Drawing No. 4065-BQF-4, Sheet 2 of 2, dated Nov. 23, 1982, for Procedure to Open Blade Removal Hatch.
Drawing No. 4065-BQM-4, Sheet 1 of 2, dated Dec. 9, 1982, for Runner Support Erection Procedure.
Drawing No. 4065-BQM-4, Sheet 2 of 2, dated Dec. 9, 1982, for Runner Support Erection Procedure.

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