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Turbo-Machinery With Flow Deflector System

a technology of flow deflector and steam turbine, which is applied in the direction of machines/engines, stators, liquid fuel engines, etc., can solve the problems of reducing the overall efficiency increasing mixing or intrusion losses, and affecting the performance of the overall turbine, so as to reduce the loss of leakage flow and improve the overall efficiency.

Inactive Publication Date: 2013-01-03
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a turbo-machine with buckets and nozzles, and a flow deflector system to improve efficiency. The system includes a bucket deflector and a nozzle deflector to limit the flow of leakage. The patent also provides a method to direct the leakage flow in a specific direction to reduce its loss. These technical improvements can lead to better performance and efficiency of turbo-machines.

Problems solved by technology

The fluid will seek the path of least resistance such that leakage may occur through the packing ring clearance between the stationary airfoil and the rotor.
The leakage flow may mix randomly with the mainstream flow and cause increase mixing or intrusion losses.
Both the random mixing of the clearance flow with the main flow caused by intrusion and the higher packing ring clearance flow losses will degrade overall turbine performance and efficiency.

Method used

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  • Turbo-Machinery With Flow Deflector System
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  • Turbo-Machinery With Flow Deflector System

Examples

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Embodiment Construction

[0021]Referring now to the drawings, in which like numerals refer to like elements throughout the several views, FIG. 1 shows a portion of a turbo-machine 10. In this example, the turbo-machine 10 may be a steam turbine 15. A gas turbine and other configurations and types of turbo-machinery also may be used herein. As described above, the steam turbine 15 includes a number of rotating airfoils or buckets 20. The rotating airfoils 20 may be attached to a rotor 25 for rotation therewith. The rotating airfoils 20 may be positioned between rows of a number of stationary airfoils or nozzles 30. The stationary airfoils 30 extend from a casing 35 on one end to a packing ring 40 on the other. The packing ring 40 may have a number of seal strips 45 positioned on both the stationary airfoil 30 and the rotor 25. A packing ring clearance 50 may extend between the stationary airfoil 30 and the rotor 25. A leakage flow 55 may extend therethrough. The nature of the leakage flow 55 may vary. Other ...

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PUM

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Abstract

The present application provides a turbo-machine. The turbo-machine may include a number of buckets, a number of nozzles, and a flow deflector system. The flow deflector system may include a bucket deflector and a nozzle deflector so as to limit leakage flow losses therethrough.

Description

TECHNICAL FIELD[0001]The present application and the resultant patent relate generally to turbo-machinery and more particularly relate to a steam turbine with a flow deflector system having extensions to restrict leakage flow in both axial and radial directions for improved efficiency.BACKGROUND OF THE INVENTION[0002]Generally described, turbo-machinery such as steam turbines, gas turbines, and the like include alternating rows of rotating airfoils or buckets and rows of stationary airfoils or nozzles. Each row of rotating airfoils may be attached to a rotor for rotation therewith. Each row of stationary airfoils may be attached at one end to a casing with each of the stationary airfoil extending radially inward toward a packing ring and the rotor. The packing ring may have seal strips extending from both the rotating and stationary surfaces so as to form a clearance therebetween. Other configurations may be used.[0003]In operation, the rotating and the stationary airfoils expand th...

Claims

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Application Information

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IPC IPC(8): F01D11/00F01D1/02
CPCF01D11/127F04D29/164F02C7/28F01D11/001
Inventor KRISHNAN, PRABAKARAN MODACHUR
Owner GENERAL ELECTRIC CO