Steamer generator stator core welding deformation controlling means

A technology of steam turbine generator and stator iron core, which is applied in welding medium, welding equipment, welding equipment and other directions, can solve the problems such as out-of-tolerance inner diameter of stator iron core, deviation of welding process parameter selection, inconsistent inner diameter of stator iron core, etc. Achieve the effect of ensuring operation safety, controlling welding deformation, and effective welding deformation

Inactive Publication Date: 2008-12-10
SICHUAN DONGFENG ELECTRIC MACHINARY WORKS CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0002] The stator core in the turbogenerator unit is very important, which is directly related to the operating performance and service life of the generator. Therefore, the turbogenerator has strict requirements on the size of the stator core, but the stator core often has inconsistent inner diameters. , especially at the welding end. According to the out-of-tolerance records of the existing stator core, the deformation before and after welding can reach 1.5mm. The main reason is that in the assembly of the stator core, the pressure ring needs to be welded to the frame after the lamination is completed. On the ring plate, the large welding deformation caused by unsatisfactory welding process is the main reason for the out-of-tolerance of the inner diameter of the stator core. In the case of the weak resistance to welding deformation of the steam turbine generator base, the welding deformation control method is improper, and the welding process Deviations in parameter selection and underestimation of the influence on welding residual stress will cause the inner diameter of the stator core of the turbogenerator to be seriously out of tolerance

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  • Steamer generator stator core welding deformation controlling means
  • Steamer generator stator core welding deformation controlling means

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Embodiment 1

[0015] Embodiment 1: A method for controlling welding deformation of a turbogenerator stator core, the control process of which is as follows:

[0016] A. Choose CO with a purity of 99.5% 2 Shielded welding gas and Φ1.2 H08Mn2SiA welding wire, the gas pressure is controlled at 0.2-7MPa during welding;

[0017] B. The first segmented symmetrical multi-layer welding is performed on the stator core of the turbogenerator at a welding speed of 25m / h, the welding current is controlled to 180A, and the arc voltage is controlled to 25V;

[0018] C. Carry out the second segmented symmetrical multi-layer welding on the stator core of the turbogenerator at a welding speed of 25m / h, the welding current is controlled to 350A, and the arc voltage is controlled to 32V;

[0019] D. The third segmented symmetrical multi-layer welding is performed on the stator core of the turbogenerator at a welding speed of 25m / h. The welding current is controlled to 280A and the arc voltage is controlled to...

Embodiment 2

[0025] Embodiment 2: A method for controlling the welding deformation of the stator core of the turbogenerator. The steps for controlling the welding deformation of the stator core of the turbogenerator are as follows:

[0026] B. Choose CO with a purity of 99.5% 2 Shielded welding gas and Φ1.2H08Mn2SiA welding wire, the gas pressure is controlled at 0.2-7MPa during welding;

[0027] C. The first segmented symmetrical multi-layer welding is performed on the stator core of the turbogenerator at a welding speed of 25m / h, the welding current is controlled to 160A, and the arc voltage is controlled to 22V;

[0028] D. Carry out the second segmented symmetrical multi-layer welding on the stator core of the turbogenerator at a welding speed of 25m / h. The welding current is controlled to 320A and the arc voltage is controlled to 30V;

[0029] E. The third segmented symmetrical multi-layer welding is performed on the stator core of the turbogenerator at a welding speed of 25m / h. The ...

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Abstract

The invention relates to a stator iron core welding deformation control method of turbine generator. Wherein, it selects best welding technique, material and parameters, uses three-segment symmetry multilayer welding method, to control the welding deformation to confirm the stator iron core quality and confirm the safety of generator.

Description

technical field [0001] The invention relates to a method for controlling welding deformation of a stator core of a steam turbine generator. Background technique [0002] The stator core in the turbogenerator unit is very important, which is directly related to the operating performance and service life of the generator. Therefore, the turbogenerator has strict requirements on the size of the stator core, but the stator core often has inconsistent inner diameters. , especially at the welding end. According to the out-of-tolerance records of the existing stator core, the deformation before and after welding can reach 1.5mm. The main reason is that in the assembly of the stator core, the pressure ring needs to be welded to the frame after the lamination is completed. On the ring plate, the large welding deformation caused by unsatisfactory welding process is the main reason for the out-of-tolerance of the inner diameter of the stator core. In the case of the weak resistance to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/095B23K35/38
Inventor 雷秀群康霆
Owner SICHUAN DONGFENG ELECTRIC MACHINARY WORKS CO LTD
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