Seal design and active clearance control strategy for turbomachines
A technology for turbines and labyrinth seals, used in gas turbine installations, machines/engines, mechanical equipment, etc., to solve problems such as unoptimized clearances, slow transient response, and limited mechanical operation flexibility
Inactive Publication Date: 2014-03-26
GENERAL ELECTRIC CO
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Problems solved by technology
Many of these methods are passive thermal based and respond slowly to transients, thus limiting the operational flexibility of the machinery
Prior art active methods are generally based on the stacked cone concept and do not optimize the clearances through them
Method used
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Embodiment Construction
[0046] One or more specific embodiments of the apparatus of the present invention will be described below. In order to provide a brief description of these examples, not all features of an actual implementation are described in the specification.
[0047] Embodiments disclosed herein relate to labyrinth seal designs, and more particularly to labyrinth seal designs and actuation control clearance strategies for active clearance control and span reduction in turbines such as turbine engines, steam turbines, and the like. As used herein, labyrinth seal designs are suitable for use in various types of turbine applications such as, but not limited to, turbojets, turbofans, turbopropulsion engines, aeroengines, gas turbines, steam turbines, wind turbines, and water turbines. Also, as used herein, singular forms such as "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.
[0048] Referring now to the drawings, wherein like numerals refer to l...
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The present invention relates to a seal design and an active clearance control strategy for turbomachines. More especially, a labyrinth seal design, an actuation control clearance strategy, and a method of operating a turbomachine are provided. The labyrinth seal design includes a plurality of features configured to open and close radial clearances in response to relative axial movement between a stationary component and a rotating component. The actuation control clearance strategy and method of operating the turbomachine are effective to achieve relative motion between a rotating component and a stationary component of the turbomachine using active elements. Axial displacement of the rotating component relative to the stationary component provides an adjustment in a radial clearance at one or more sealing locations between the rotating component and the stationary component to suit a given operating condition of the turbomachine.
Description
technical field [0001] Embodiments presented herein relate generally to seals for rotating machinery such as steam and gas turbines, and in particular to labyrinth seal designs and active lash control actuation for active lash control and span reduction in turbines Strategy. Background technique [0002] Rotating machinery and more specifically turbines such as steam and gas turbines for power generation and mechanical drive applications are typically large machines composed of multiple turbine stages. In a turbine, the high pressure fluid flowing through the turbine stages must pass through a series of stationary and rotating components, and seals between the stationary and rotating components are used to control leakage. The efficiency of a turbine is directly dependent on the ability of the seals to prevent leakage, for example, between the rotor and the stator. Turbine designs are conventionally classified as impingement or reaction, where most of the pressure drop occ...
Claims
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IPC IPC(8): F01D11/02F01D11/08F01D11/14
CPCF01D11/001F01D11/02F02C7/28F02K3/00
Inventor D.特里维迪N.A.特恩奎斯特郑小清M.伊纳尔波拉特
Owner GENERAL ELECTRIC CO