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Combination method for steam seals of steam turbine

A steam seal and size technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as endangering equipment safety, and achieve the effect of improving cylinder efficiency, improving operating economy, and improving operating economy and safety.

Active Publication Date: 2015-04-01
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the major shaft bending accidents of the previous 125MW, 200MW, and 300MW steam turbines endangered the safety of equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: The combination method of the steam turbine seal of the present invention is as follows.

[0024] On-site survey and map the size requirements of the high-pressure steam inlet balance ring seal, the high-pressure exhaust steam balance ring seal, the medium-pressure steam inlet balance ring seal and the high-pressure diaphragm seal; process the blank parts of the adjustable steam seal according to the size requirements; The blank parts of adjustable steam seals are sent to the site for finishing to ensure their concentricity and clearance requirements, and then processed into adjustable steam seals, and then the adjustable steam seals are installed separately.

[0025] On-site surveying and mapping of the size requirements of the medium pressure diaphragm seal; processing the blank of the side gear seal according to the size requirements; delivering the blank of the side gear seal to the site for finishing to ensure its concentricity and clearance requiremen...

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PUM

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Abstract

The invention relates to a combination method for steam seals of a steam turbine, which belongs to the technical field of steam turbines. A high-pressure steam inlet balance annular steam seal, a high-pressure steam outlet balance annular steam seal, a medium-pressure steam inlet balance annular steam seal and a high-pressure partition steam seal are adjustable steam seals, a medium partition steam seal is a side-toothed steam seal, a high-pressure axial seal and a medium-pressure axial seal are contact type ferrite steam seals, and a low-pressure partition steam seal, a low-pressure blade ejection steam seal and a low-pressure axial seal are honeycombed steam seals. The combination method has the advantages that the method is reasonable in design, the steam seals are low in leakage, and the steam turbine is low in differential expansion, not easy to deform when heated, low in temperature difference of upper and lower cylinders and stable in operation.

Description

technical field [0001] The invention relates to a method for combining steam turbine seals, belonging to the technical field of steam turbines. Background technique [0002] There are many factors that affect the efficiency of the steam turbine, among which the flow through the steam turbine, the steam leakage of the stationary vane seal and the shaft seal are the important reasons for the reduction of the efficiency of the steam turbine, especially the parameters of the steam turbine are getting higher and higher. As the density increases, the mass flow rate increases. Steam leakage not only bypasses the moving and stationary vanes that do work, but also causes disturbance of the steam flow in the main channel of the next stage, and the double negative effect affects the efficiency of the stage. [0003] The most commonly used steam seal for modern steam turbines is still the comb-tooth structure. Research and practical application have found that the comb-tooth seal has i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D11/04
Inventor 崔传涛赵玉柱王宝玉常浩
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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