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Method and device for testing a weld joint for a shaft by means of a detection device introduced through a passage of the shaft

A detection device and channel technology, applied in measurement devices, welding equipment, applications, etc., can solve the problem of cooling and reheating taking a long time, achieve high-quality reliability, and avoid the effect of idling time

Inactive Publication Date: 2012-05-16
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cooling and reheating phases for the final welding of the remaining weld seams are time-consuming especially when the rotor mass is high

Method used

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  • Method and device for testing a weld joint for a shaft by means of a detection device introduced through a passage of the shaft
  • Method and device for testing a weld joint for a shaft by means of a detection device introduced through a passage of the shaft
  • Method and device for testing a weld joint for a shaft by means of a detection device introduced through a passage of the shaft

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Experimental program
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Embodiment Construction

[0027] figure 1 An exemplary embodiment of a rotor shaft 1 with a channel 18 and a detection device 19 or a radiation source 19 a is shown. In principle, any shafts or shafts with the same design are encompassed by the invention. A special embodiment is the rotor shaft of a turbine and / or generator. figure 1 Shaft segments 5 are shown, which each have two main boundary circular surfaces 7 perpendicular to the axis of rotation 2 . The shaft section 5 is rotationally symmetrical about the axis of rotation 2 and has at least one cylinder 3 positioned coaxially along the axis of rotation 2 . Such a cylindrical symmetry should provide an optimal course of the curve when the rotor shaft 1 rotates. The main boundary circle 7 is thus the bottom and top of one cylinder 3 or the bottom and top of two different cylinders 3 . Starting from at least one main boundary circular surface side, core regions are respectively removed from the shaft segments 5 around the axis of rotation 2 . ...

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Abstract

The aim of the invention for a narrow-gap arc welding process of shaft parts is to easily and effectively improve the quality of a first tubular annular seam (17) when testing a weld joint of a shaft (1), particularly for a turbine and / or a generator. According to the invention, the quality of the first tubular annular seam (17) is assessed from within a hollow chamber (15) during and / or after welding by means of a detection device (19) or a radiation source (19a) introduced into the hollow chamber (15) from outside said chamber through a passage (18). A video camera is particularly suitable as a detection device (19). In this manner, the welding procedure can be directly regulated.

Description

technical field [0001] The invention relates to a method according to the preambles of the independent claims and a device according to the preambles of the dependent claims. Background technique [0002] For the welding of rotor shafts, in particular in turbine construction and generator construction, the arc narrow-gap welding process is used for assembling the forged shaft sections into the total rotor. An important quality criterion is the configuration of the first tubular annular weld, that is to say the so-called first run or bottom weld, since the shape and absence of defects of the bottom of this weld significantly influence the dynamic behavior of the rotor. The core cross-section of the shaft section is bored, that is to say the bottom welding produces a tubular annular weld. In order to check such a weld base structure, X-ray fluoroscopy of the welded connection is usually carried out in individual sections over the entire circumference and the quality is checke...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/02B23K9/028F01D5/06B23K9/095G01N23/02G01N23/18B23K31/12
CPCB23K9/0213B23K9/0286B23K9/0956B23K2201/001B23K2201/06G01N23/18F01D5/063B23K31/125B23K9/0953B23K2101/001B23K2101/06G01N23/083
Inventor K-H.贡策尔曼
Owner SIEMENS AG