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A method for controlling the welding deformation of a hollow stationary vane and a special cavity supporting device

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

Active Publication Date: 2016-12-14
WUXI TURBINE BLADE
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  • Abstract
  • Description
  • 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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  • A method for controlling the welding deformation of a hollow stationary vane and a special cavity supporting device
  • A method for controlling the welding deformation of a hollow stationary vane and a special cavity supporting device
  • A method for controlling the welding deformation of a hollow stationary vane and a special cavity supporting device

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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 the welding deformation of the hollow stator, which can effectively control the welding deformation of the blade profile when the blade is welded at the steam inlet and outlet sides, and the invention also provides a special cavity for controlling the welding deformation of the hollow stator The supporting device, first spot welding the inlet and outlet edges of the inner arc plate and the back arc plate of the blade, and then installing the cavity support device in the hollow cavity of the blade, and then putting the whole blade into the welding fixture for blade inlet and outlet For the welding operation on the steam outlet side, the blade is removed after the welding 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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Patent Type & Authority Patents(China)
IPC IPC(8): B23K37/00
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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