Steam turbine flow direction control system
Patent
·
OSTI ID:6403126
This patent describes, in a reheat steam turbine having at least one turbine element with an impulse chamber and an exhaust stage, the steam turbine having other elements and zones wherein the pressure is lower than that of the exhaust stage, a system for reducing windage heating and resulting distress to turbine blading by prevention of Coanda-type flow. It comprises: outlet means located upstream of the exhaust stage for extraction of steam therethrough; first duct means connecting the outlet means to a relatively low pressure zone; first valve means connected to the duct means for controlling steam flow through the outlet means; inlet means into the impulse chamber for introduction of exhaust steam from the exhaust stage; second duct means connected between the inlet means and the exhaust stage; and second valve means connected to the second duct means for controlling the flow to exhaust steam into the impulse chamber.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA (USA)
- Patent Number(s):
- US 4957410; A
- Application Number:
- PPN: US s 7-306188
- OSTI ID:
- 6403126
- Country of Publication:
- United States
- Language:
- English
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