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Turbine shaft and method for producing same and utilization thereof

一种透平轴、轴向的技术，应用在透平轴领域，能够解决方法复杂和麻烦等问题，达到廉价制造的效果

Inactive Publication Date: 2007-09-05
SIEMENS ENERGY GLOBAL GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The methods used to manufacture such turbine shafts are also complex and cumbersome

Method used

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  • Turbine shaft and method for producing same and utilization thereof
  • Turbine shaft and method for producing same and utilization thereof
  • Turbine shaft and method for producing same and utilization thereof

Examples

Experimental program
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Embodiment Construction

[0020] In a combined medium-pressure and low-pressure steam turbine (not shown), the live steam flows along a turbine shaft in a first section, where it expands and simultaneously cools down. Therefore, in this first section, heat-resistant requirements are placed on the material of the turbine shaft. The temperature of this live steam can be as high as 565°C. The expanded and cooled live steam flows into a second section. Low temperature toughness of the turbine shaft must be required in this second section.

[0021] The turbine shaft 1 shown in FIG. 1 has long been known as a one-piece shaft. Its manufacturing material is 23CrMoNiWV8-8 and is oriented along the axis 19. Such a turbine shaft 1 belongs to the prior art.

[0022] Such turbine shafts 1 are frequently used in combined steam turbines. The steam turbine has a 10 to 12.5 m 2 outflow section. In this design of the return flow structure, after flowing through the medium-pressure section 13 , the steam turns to ...

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PUM

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Abstract

The invention relates to a turbine shaft for a steam turbine, oriented in an axial direction and comprising a first and a second flow region. According to the invention, a first material is provided in the first flow region of the turbine shaft, and a second flow region is provided in the second flow region thereof, the first material having heat-resistant properties and the second material having cold-resistant properties. The inventive turbine shaft is produced by means of a construction weld seam without any previous buffer layer welding on one of the two materials.

Description

technical field [0001] The invention relates to an axially oriented turbine shaft for a steam turbine having a first flow region and a second flow region axially adjacent to the first flow region, wherein the turbine The flat shaft has a first material in the first flow zone and a second material in the second flow zone. The invention also relates to a method for producing a turbine shaft comprising two materials and oriented in an axial direction. Background technique [0002] Turbine shafts are commonly used in fluid machinery. A steam turbine can be seen as an example of a fluid machine. To increase efficiency, steam turbines are constructed as so-called combined steam turbines. This steam turbine has an inflow zone and two or more flow zones with moving and stationary blades. A flow medium flows through the inflow region to a first flow region and then to another flow region. An example of a flow medium may be steam. [0003] Steam at a temperature of more than 400...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D5/02F01D5/28F01D5/06
CPCF01D5/063F01D5/026F01D5/28F05D2230/232F05C2201/0466F05C2201/0409F05D2300/132F05D2300/131F05B2230/232F05C2201/0406Y10T29/4932
Inventor 沃尔夫冈·詹森托斯滕-乌尔夫·克恩海因茨·克洛克纳
Owner SIEMENS ENERGY GLOBAL GMBH & CO KG