Multi-valve arc inlet for steam turbine
AssigneePower Technology, Inc.
InventorsEdward T. Vitone, Jr., John B. Haven, Michael R. Kolk
Life of this patent
Estimating the term…
Abstract
A steam turbine has multiple valves for introducing steam into a steam turbine. Each of the input valves introduce steam flow around the entire the 360 degree arc. The set of nozzles are each divided into a plurality of chambers. Each set of chambers extends around the full arc of the turbine. Each set has a valve. The chambers are designed so that all valves are open when the turbine is running at maximum output. The chambers are sized such that valve throttling losses are minimized when the turbine is at its normal operating condition.
Claims20
A steam turbine having:
- a casing;
- a rotatable shaft carried by the casing;
- a turbine stage having a set of stationary blades carried by the housing defining a plurality of nozzles and a set of rotating blades carried by the shaft, the stationary blades adapted to direct flow of steam towards the rotating blades and the rotating blades extracting energy from the steam;
- the improvement comprising:
- the stationary blades having at least one annular ring for dividing the nozzles into two sets of concentric rings of nozzles around the shaft.
An axial flow steam turbine comprising:
- a casing;
- a shaft rotatably carried by the casing:
- a plurality of moving blades carried by the shaft and adapted for extracting energy from a fluid;
- least two sets of nozzles carried by the casing for introducing fluid into the casing, each set of nozzles encircling the shaft and adapted to direct fluid towards the moving blades carried by the shaft;
- and
- a chamber for each of the sets of nozzles, each chamber forms a complete arc encircling the shaft for providing fluid to the set of nozzles and a flow controller for regulating the fluid introduced into the chamber, wherein the chambers divided concentrically from each other.
A turbine comprising:
- a casing;
- a shaft rotatably carried by the casing;
- a plurality of moving blades, the blades extending radially outward from the shaft and adapted for extracting energy from a fluid;
- and
- at least two sets of nozzles carried by the casing for introducing fluid into the casing, each set of nozzles forming a concentric ring around the shaft and adapted to direct fluid towards the moving blades carried by the shaft.
A steam turbine comprising:
- a casing;
- a shaft rotatably carried by the casing;
- at least one stage, each stage having a plurality of moving blades extending radially outward from the shaft and the casing defines a plurality of stationary openings, the moving blades adapted for extracting energy from steam, and the stationary openings directing the steam towards the moving blades;
- and
- the stationary openings of the first stage having two sets of nozzle openings, the nozzles carried by the casing for introducing steam into the casing, each set of nozzles forming a concentric ring around the shaft and adapted to direct steam towards the moving blades of the first stage.
An inlet for a steam turbine comprising:
- a casing defining a pair of chambers, each chamber having an inlet and an outlet, the outlet being circular and adapted to encircle a shaft of the turbine;
- and
- a pair of sets of nozzles, the nozzles carried by the casing and connected to a chamber for introducing steam into the casing, each set of nozzles forming concentric rings around the shaft and adapted to direct steam towards the moving blades of the first stage.
Dependencies are inferred from the claim text.