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Steam turbine variable clearance packing

一种蒸汽涡轮、填塞环的技术，应用在发动机元件、机械设备、发动机的密封等方向，能够解决不实际、安装弹簧困难等问题

Inactive Publication Date: 2007-10-17
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when working with smaller turbine units for applications such as boiler feed pumps, reactor feed pumps, mechanical drives for compressors and pumps, and some generator drive units, in smaller turbine units It becomes difficult and impractical to install a functioning spring in the narrow width / diameter annular grooves present in

Method used

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  • Steam turbine variable clearance packing
  • Steam turbine variable clearance packing
  • Steam turbine variable clearance packing

Examples

Experimental program
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Embodiment Construction

[0017] Referring to FIG. 1 , there is illustrated a portion of a steam turbine 10 having a turbine shaft 12 disposed within a stationary component, such as a turbine diaphragm 14 including a first diaphragm half 16 and a second diaphragm half 18 , respectively. A labyrinth seal is provided at the turbine shaft to diaphragm interface to prevent leakage. The labyrinth seal includes a variable clearance packing ring assembly 20a, sometimes referred to as a seal ring assembly, as shown in FIG. The packing ring segment is movable around the turbine shaft 12 between an outermost position with a large gap and an innermost position with a small gap during start-up operation and speed operation, respectively.

[0018] Each of the packing ring segments includes two spring-loaded bars 30 (better illustrated in FIG. 2 , rotated for clarity in FIG. 2 from their position in FIG. Move in the radial direction between the position and the small gap position. The spring loaded strip 30 is dis...

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PUM

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Abstract

Disclosed herein is a packing ring assembly including a packing ring segment, a bar, a cover plate, and a spring. The packing ring segment has an axial slot. The bar is disposed within the slot. The cover plate is disposed along an outer periphery of the packing ring segment. And, the spring is compressed between the bar and the cover plate.

Description

technical field [0001] The present application relates generally to steam turbines, and more particularly to seals between rotating and stationary components of steam turbines. Background technique [0002] In rotating machines such as turbomachines, seals are provided between rotating and stationary components. For example, in steam turbines it is customary to provide a plurality of arcuate packing ring segments (sometimes referred to as seal ring segments) to form a labyrinth seal between stationary and rotating components. Generally, an arcuate packing ring segment is arranged within an annular groove of the stationary component, concentric with the axis of rotation of the machine and thus concentric with the sealing surface of the rotating component. Each arcuate seal segment carries an arcuate seal surface opposite the seal surface of the rotating component. In a labyrinth type seal, the sealing face carries an array of radially directed axially spaced teeth spaced ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/02
CPCF16J15/445F01D11/003F05D2220/31F16J15/442F01D11/12F01D11/14F01D11/00
Inventor R·J·谢弗雷特F·里瓦斯F·G·拜利W·E·阿迪斯M·E·凯利B·A·库图尔K·N·劳雷尔
Owner GENERAL ELECTRIC CO
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