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Stress treatment device and turbine manufacture method

A stress treatment and turbine technology, applied in the direction of turbines, manufacturing tools, blade support components, etc., can solve problems such as increased centrifugal force of blades, achieve the effect of improving fatigue strength and reducing stress corrosion cracking

Active Publication Date: 2015-04-01
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the length of the blade increases, the centrifugal force acting on the blade increases

Method used

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  • Stress treatment device and turbine manufacture method
  • Stress treatment device and turbine manufacture method
  • Stress treatment device and turbine manufacture method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0074] Embodiments will be described below with reference to the drawings. Figure 1A ~ Figure 1C This is a diagram for explaining the simultaneous reaming of the turbine rotor blade 10 and the disk 12 . Figure 1A is a front view showing the combined structure of the turbine rotor blade 10 and the disk 12, Figure 1B is the side view, Figure 1C yes Figure 1B Enlarged view of part X. figure 2 It is a diagram for explaining the configuration of the stress treatment device 24 according to Embodiment 1, and is a front view showing stress improvement performed on the pin hole 15 of the joint structure of the turbine rotor blade 10 and the disk 12 . image 3 It means viewing from direction A figure 2 composition to the view. Figure 4 yes means figure 2 Enlarged view of the head shown. However, in the following figures, the same reference numerals are assigned to the same components.

[0075] The turbine rotor blade 10 has a blade fork 11 at the lower end. The disc 12 ...

Embodiment approach 2

[0120] Figure 9 It is a figure for explaining the structure of the stress processing apparatus 24 which concerns on Embodiment 2, and is a front view which shows the time of stress improvement to the pin hole 15 of the disk 12. FIG. Since the structure of the stress treatment device 24 in Embodiment 2 is the same as figure 2 The shown stress treatment device has the same configuration, so detailed description is omitted.

[0121] In this stress treatment device 24 , a guide plate 59 having the same shape as that of the blade fork 11 is arranged at a position where the turbine rotor blade 10 is removed. After the disk yoke 13 and the guide plate 59 are temporarily pre-positioned by the pin, shot blasting is performed on the inner surface of the pin hole 15 to form the compressive stress region C. Here, since the positioning of the position of the pin hole 15 and the position of the construction head 38 is the same as that of the stress treatment device in Embodiment 1, desc...

Embodiment approach 3

[0125] Next, a case where shot peening is performed on the turbine rotor blade 10 removed from the rotor 1 will be described. Figure 10A ~ Figure 10C It is a figure which shows the turbine rotor blade 10 at the time of single-piece construction. Figure 10A , Figure 10B is a perspective view of a turbine blade, Figure 10C is the partial side view from the x direction. Figure 11 It is a perspective view showing the turbine rotor blade 10 when two sheets are stacked and constructed. Figure 12It is a diagram for explaining the configuration of the stress treatment device 60 according to Embodiment 3, and is a perspective view showing the stress treatment device 60 for improving the stress on the inner surface of the pin hole 15 of the removed turbine rotor blade 10 .

[0126] The turbine rotor blade 10 has semicircular holes 15a, 15b located in the width direction. Three of these 15a and 15b are formed along the radial direction of the rotor 1, and constitute a radical s...

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Abstract

A stress treatment device has an operating unit including a head unit performing peening by irradiating an inside of a hole formed in a structure with laser to form a compressive stress region in the hole; a laser unit having an optical fiber guiding the laser to the head unit; a jetting unit jetting liquid into the hole; and a support part supporting the optical fiber in a manner of allowing the jetted liquid to flow through and being fixed in the head unit.

Description

technical field [0001] Embodiments of the present invention relate to a stress treatment device and construction system for a steam turbine in which stress improvement treatment is performed on one or both of a structure, for example, a turbine rotor blade and a disk. Background technique [0002] The steam turbine is composed of a plurality of turbine rotor blades embedded in the circumferential direction of a rotor, and stationary blades (nozzles) fixed to the turbine casing. A turbine stage is formed by a combination of a pair of turbine moving blades and stationary blades. A steam turbine is formed by arranging a number of turbine stages on a disc. In order to be able to withstand the centrifugal force during operation, the turbine blades and disks are made of, for example, 500kg / mm 2 The above materials with high tensile strength (such as high-strength copper) are formed, and are combined by, for example, a fork structure. This high tensile strength material has high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D25/00B23K26/00F01D5/30B23K26/02B23K26/03B23K26/064B23K26/14B23K26/16C23C26/00
CPCF01D5/286B23K26/0069F05D2230/13Y10T29/49321F01D5/005B23K26/0066B23K2201/001B23K26/352B23K26/356B23K2101/001
Inventor 佐佐木英寿千田格村上格野村光
Owner KK TOSHIBA
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