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A variable clearance packing ring

A technology for packing rings and annuluses, applied in the field of steam turbines, can solve the problems of difficult and impractical installation of springs

Inactive Publication Date: 2008-02-20
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, when operating with smaller turbine units used in applications such as boiler feed pumps, reactor feed pumps, mechanical drives and pumps for compressors, and certain generator drive units, in smaller turbine units The presence of narrow width / diameter annular grooves makes it difficult and impractical to fit the required springs

Method used

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  • A variable clearance packing ring
  • A variable clearance packing ring
  • A variable clearance packing ring

Examples

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Embodiment Construction

[0017] Referring to Figures 1-5, the variable gap packing ring segment 10 is illustrated. For the sake of clarity, FIG. 1 shows a section 11 of a rotating machine comprising a plurality of packing ring segments 10 , represented by way of example as four packing ring segments 10 . The packing ring segments 10 have an annular configuration 12 and are each used to form a seal between a stationary component 14 of the rotating machine and a turbine shaft 16 . As shown in FIG. 1 , the stationary component may be a diaphragm comprising a first half 18 and a second half 20 . Packing ring segment 10 is movable between an outermost large gap or open position 21 and an innermost small gap or sealed position 23, each of which is described in more detail below.

[0018] Each ring segment 10 , a portion of which is described in detail in FIGS. 2-4 , includes a radially inwardly disposed surface 22 related to a radially outwardly disposed surface 24 via an intermediate portion 25 , serving ...

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PUM

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Abstract

Disclosed is a packing ring segment for providing a seal between a stationary component and a turbine shaft of a rotary machine, including an actuating arrangement disposed within the packing ring segment, and a resilient beam-type element included in the actuating arrangement, the resilient beam-type element radially outwardly biasing the packing ring segment away from the turbine shaft.

Description

technical field [0001] The present invention relates generally to a steam turbine, and more particularly to a seal between rotating and stationary components of a steam turbine. Background technique [0002] In rotating machines such as turbines, seals are provided between rotating and stationary components. For example, in a steam turbine, a plurality of arcuate packing ring segments (sometimes referred to as seal ring segments) carrying a labyrinth seal structure are often provided to form a seal between stationary and rotating parts of a rotating machine. Typically, the arcuate packing ring segment is arranged in an annular groove of the stationary part concentric with the axis of rotation of the machine, and thus concentric with the sealing surface of the rotating part. Each arcuate seal segment carries an arcuate sealing surface opposite the sealing surface of the rotating component. In a labyrinth seal, the sealing surface carries a radial array of axially spaced tee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/02
CPCF16J15/442F01D11/08F01D11/12F01D11/14
Inventor R·J·谢弗雷特
Owner GENERAL ELECTRIC CO