Arrangement for the automatic running gap control on a two or multi-stage turbine
First Claim
1. An arrangement for automatic running gap control on a turbine having at least two stages, comprisingfirst and second rotors within an outer casing,shroud segments moveably arranged around the rotors,stator vanes positioned upstream, between and downstream of these rotors,a bridge connecting the upstream and downstream stator vanes at outer platforms thereof, the bridge being axially and circumferentially fixed and radially located on the outer casing, the intermediate stator vanes and shroud segments being attached to the bridge;
- wherein the bridge includes a plurality of circumferentially arranged bridge elements and the bridge elements are each located on the outer casing by radially flexible links which form a segmented inner casing, with a separate supporting element, which is radially, axially and circumferentially fixed on each bridge element, being integrally connected to the respective intermediate stator vane and the second shroud segment.
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Accused Products
Abstract
On a two or multi-stage turbine, expansion rings are provided in all stages at the sides of the rotors for passive, continuous running gap control whose thermal expansion and contraction behavior corresponds to that of the rotors and which are connected to radially moveable upstream and downstream stator vanes (5, 7). The downstream stator vanes are assembled to the upstream stator vanes via a bridge (16; 17, 18) which is axially and circumferentially fixed and located flexibly in the radial direction on the outer casing (10) of the turbine. The stator vanes (6) arranged between the rotor disks are integrally connected to the bridge or, as separate components, held axially and circumferentially on the bridge to take up rolling and tilting moments.
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Citations
18 Claims
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1. An arrangement for automatic running gap control on a turbine having at least two stages, comprising
first and second rotors within an outer casing, shroud segments moveably arranged around the rotors, stator vanes positioned upstream, between and downstream of these rotors, a bridge connecting the upstream and downstream stator vanes at outer platforms thereof, the bridge being axially and circumferentially fixed and radially located on the outer casing, the intermediate stator vanes and shroud segments being attached to the bridge; wherein the bridge includes a plurality of circumferentially arranged bridge elements and the bridge elements are each located on the outer casing by radially flexible links which form a segmented inner casing, with a separate supporting element, which is radially, axially and circumferentially fixed on each bridge element, being integrally connected to the respective intermediate stator vane and the second shroud segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
Specification