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Internal cooling for a flow machine

A steam turbine and annular cooling technology, applied in the field of steam turbines, can solve problems such as the unfavorable heat load of steam turbines, and achieve the effect of improving the cooling effect

Inactive Publication Date: 2013-03-27
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem here is that, when using hitherto customary turbine materials, the increased loading of the steam turbine body as a result of the increased steam parameters can lead to unfavorable thermal loads of the steam turbine
Therefore, it is almost no longer possible to create such a steam turbine

Method used

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  • Internal cooling for a flow machine
  • Internal cooling for a flow machine

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Experimental program
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Effect test

Embodiment Construction

[0021] exist figure 1 A cross section through the steam turbine 1 is shown in . The steam turbine 1 has an outer housing 2 and an inner housing 3 . The inner housing 3 and the outer housing 2 have live steam supply channels, which are in the figure 2 described in detail. Inside the inner casing 3 is provided a rotor 5 with a thrust balance piston 4 in a rotationally mounted manner. Usually, the rotor is designed rotationally symmetrically about the axis of rotation 6 . The rotor 5 includes a plurality of rotor blades 7 . The inner housing 3 has a plurality of guide vanes 8 . A flow channel 9 is formed between the inner housing 3 and the rotor 5 . The flow channel 9 comprises a plurality of blade stages each formed from a row of rotor blades 7 and a row of guide blades 8 .

[0022] Via the live steam supply channel, the live steam flows into the inlet opening 10 and from there flows through the flow channel 9 in a flow direction 11 which extends substantially parallel t...

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PUM

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Abstract

The steam turbine comprises an outer housing (2) and an inner housing (3). A rotor (5) is provided, which comprises a thrust balance piston (4) and multiple rotor blades rotatably arranged inside the inner housing. The inner housing comprises an inner housing end area formed around the thrust balance piston. A seal (27) is provided, which forms a pressure chamber (29) arranged between the inner housing end area and the outer housing.

Description

technical field [0001] The invention relates to a steam turbine having an outer casing and an inner casing, wherein a rotor comprising a plurality of rotor blades with thrust balancing pistons is arranged in a rotationally mounted manner inside the inner casing, wherein the inner casing has a configuration surrounding the thrust balancing pistons The end area of ​​the inner shell. Background technique [0002] In this application, a steam turbine is to be understood as any turbine or sub-turbine through which a working medium in the form of steam flows. In contrast, gas turbines have gas and / or air flowing through them as the working medium, which however is under completely different temperature and pressure conditions than the steam in steam turbines. In contrast to a gas turbine, in a steam turbine, for example, the working medium flowing into the sub-turbine with the highest temperature has at the same time the highest pressure. In gas turbines, it is also possible to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D3/04F01D11/00F01D25/14F02C7/18
CPCF01D11/005F05D2260/941F01D3/04F01D25/14F05D2220/31F05B2220/301F02C7/18F05D2260/94
Inventor 马丁纳·霍尔德乌韦·赞德
Owner SIEMENS AG