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Method and special cavity supporting device for controlling hollow stationary blade welding deformation

A technology of hollow stationary blades and supporting devices, applied in auxiliary devices, welding equipment, welding equipment, etc., can solve the problems of irregular deformation of the blade surface, difficult correction and irregularity, etc.

Active Publication Date: 2014-02-26
WUXI TURBINE BLADE
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  • Abstract
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  • Claims
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Problems solved by technology

[0002] Hollow partition vanes are welded by two punched sheets, the inner arc plate 1 and the back arc plate 2, and the welded area is the entire steam inlet side 3 and steam outlet side 4, see figure 1 In the process of welding such blades with conventional technology, a large amount of thermal stress is generated due to heat accumulation at the weld seam. At the same time, because the blade itself is a hollow blade, the thermal stress will cause irregular deformation of the entire blade surface, and because of this This kind of irregular deformation has no regularity, so it is difficult to correct it

Method used

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  • Method and special cavity supporting device for controlling hollow stationary blade welding deformation
  • Method and special cavity supporting device for controlling hollow stationary blade welding deformation
  • Method and special cavity supporting device for controlling hollow stationary blade welding deformation

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Embodiment Construction

[0011] A method for controlling the welding deformation of a hollow static blade, firstly spot welding and positioning the steam inlet and outlet sides of the inner arc plate 1 and the back arc plate 2 of the blade, and then installing a special cavity support device 5 in the hollow cavity of the blade, See figure 2 , and then put the whole blade into the welding fixture to carry out the welding operation of the blade inlet and outlet sides, after the welding is completed, take off the blade after it is fully cooled, and finally take out the cavity support device from the blade cavity.

[0012] The special cavity support device in the present invention is composed of a plurality of cavity support blocks 6. The number of cavity support blocks 6 is determined according to the total effective length of the blades. In this embodiment, there are five cavity support blocks 6. block, see image 3 , the combined outer profile of the five cavity support blocks fits the inner profile ...

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Abstract

The invention provides a method for controlling hollow stationary blade welding deformation. By means of the method, welding deformation of blade profiles can be controlled effectively when a blade leading edge and a blade trailing edge are welded. The invention further provides a special cavity supporting device for controlling the hollow stationary blade welding deformation. The method includes that a leading edge and a trailing edge of an inner arc plate and a back arc plate of the blade are subjected to spot welding location, the cavity supporting device is arranged in the hollow cavity of the blade, the whole blade is installed in a welding clamp to conduct welding of the blade leading edge and the blade trailing edge, the blade is taken down after welding is finished and the blade is fully cooled, and finally the cavity supporting device is taken out from the blade cavity.

Description

technical field [0001] The invention relates to the technical field of processing hollow diaphragm-type stationary blades, in particular to a method for controlling the welding deformation of hollow stationary vanes and a special cavity supporting device. Background technique [0002] Hollow partition vanes are welded by two punched sheets, the inner arc plate 1 and the back arc plate 2, and the welded area is the entire steam inlet side 3 and steam outlet side 4, see figure 1 In the process of welding such blades with conventional technology, a large amount of thermal stress is generated due to heat accumulation at the weld seam. At the same time, because the blade itself is a hollow blade, the thermal stress will cause irregular deformation of the entire blade surface, and because of this This kind of irregular deformation has no regularity, so it is difficult to correct it. Contents of the invention [0003] In view of the above problems, the present invention provides...

Claims

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Application Information

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IPC IPC(8): B23K37/00
CPCB23K31/003
Inventor 刘永骏苏化冰范菲滕树新江伟虞超徐大懋
Owner WUXI TURBINE BLADE
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