REPLACING A STUB SHAFT BEARING FOR A HYDROELECTRIC TURBINE USING A RUNNER HUB LIFTING DEVICE
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United States of America Patent
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Issued Date -
Jan 12, 2023
app pub date -
Jul 6, 2021
filing date -
Jul 6, 2021
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
The stub shaft bearing for a stub shaft can be replaced while the stub shaft remains installed in a hydroelectric unit. A runner hub lifting device may be positioned within a discharge ring surrounding a runner hub. The runner hub lifting device may lift the runner hub, and a stub shaft bearing may be removed from a stub shaft. The stub shaft bearing may be disassembled into bearing sections while located in a chamber in the hydroelectric unit. The bearing sections may be removed from the chamber through a service hatch in the chamber. A replacement stub shaft bearing may be moved into the chamber and installed on the stub shaft. The runner hub lifting device may lower the runner hub.
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