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1000MW steam turbine distorting yataghan blade as well as method for manufacturing the same

A technology of steam turbines and sabers, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of large secondary flow loss, etc., achieve the effects of reducing mold loss, reasonable process flow, and guaranteed yield

Inactive Publication Date: 2008-10-08
无锡润和叶片制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing high, medium and low pressure cylinder stator blades use straight blades and twisted blades, and the secondary flow loss is relatively large

Method used

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  • 1000MW steam turbine distorting yataghan blade as well as method for manufacturing the same
  • 1000MW steam turbine distorting yataghan blade as well as method for manufacturing the same
  • 1000MW steam turbine distorting yataghan blade as well as method for manufacturing the same

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Embodiment Construction

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. This kind of 1000MW ultra-supercritical steam turbine high, medium and low pressure cylinder twisted saber-shaped stationary blades, its form is composed of three parts: blade root 1, blade shape 2, shroud 3 (see image 3 , Figure 4 , Figure 5 ).

[0024] see figure 1 , figure 2 , Figure 4 On the basis of the original variable-section twisted blade, this kind of stator blade type 2 is bent in a certain circumferential direction, and its form is about 16° at the top and about 12° at the root. See the throat stack in Table 1 for details. The change of point coordinates in the Y direction. When the blade is formed, it can be translated along the circumferential direction on the corresponding blade height according to each section profile of the original straight blade or twisted blade. from figure 1 , Figure 4 It can clearly see the bend...

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Abstract

Disclosed are contorted saber-shaped stationary blades for high, middle and low pressure cylinders of a supercritical steam turbine of 1000MW, which are composed of a blade root, a blade profile and a shroud ring; wherein, the blade has a contorted saber-shaped cross section, which is contorted at the circumferential direction; wherein, the sections along the length direction of the blade roots of contorted saber-shaped stationary blades for high and middle pressure cylinders are T-shaped while the section along the length direction of the blade root of the contorted saber-shaped stationary blade for the low pressure cylinder is L-shaped; a blade tip is in the form of an integral shroud ring structure. The stationary blades adopt latest compound leaned technology and processing technology, and on the basis of ensuring less damage to the blade profile, the blade is contorted in the blade root and the blade tip at the circumferential direction, which causes air flow to speed up slightly when passing through the blade root and the blade tip and reduces the flowing of the airflow at the end faces of the blade root and the blade tip.

Description

1. Technical field [0001] The invention relates to a 1000MW steam turbine high-, medium- and low-pressure cylinder stationary blade, in particular to a blade with a twisted saber structure and a preparation method thereof. 2. Background technology [0002] At present, thermal power units have developed to ultra-supercritical units with large capacity, high parameters and high efficiency. The 1000MW ultra-supercritical unit is regarded as the pinnacle of thermal power manufacturing technology in the world. It is the latest high-end product in the international power market in recent years. It is a new generation of technology for upgrading my country's power industry and reducing technology and equipment in developed countries. [0003] Its rated power is unprecedentedly high, and it has the unparalleled advantages of general thermal power units in terms of efficiency, environmental protection, energy saving and other indicators. Compared with supercritical units, if the the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D9/02
Inventor 唐志军窦爱国周建伟丁艳
Owner 无锡润和叶片制造有限公司
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