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Assembling method of lock parts of steam turbine rotor tooth blade root and end blade

A technology of a steam turbine rotor and an assembly method, which is applied in the directions of engine components, blade support components, mechanical equipment, etc., can solve the problems of the assembly position accuracy of the tooth-shaped blade root end blade lock parts of the steam turbine rotor, and the safety and assembly quality cannot be guaranteed. , to achieve the effect of improving product assembly quality, simple operation method and ensuring safety

Active Publication Date: 2017-06-23
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the problem that the assembly position accuracy, safety and assembly quality of the toothed blade root and end blade locking parts of the steam turbine rotor cannot be guaranteed, and further provides an assembly method of the steam turbine rotor toothed blade root and final blade locking parts

Method used

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  • Assembling method of lock parts of steam turbine rotor tooth blade root and end blade
  • Assembling method of lock parts of steam turbine rotor tooth blade root and end blade
  • Assembling method of lock parts of steam turbine rotor tooth blade root and end blade

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Experimental program
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specific Embodiment approach 1

[0014] Specific implementation mode one: combine Figure 1-Figure 15 Note that the method for assembling the toothed blade root and final blade locking parts of the steam turbine rotor in this embodiment is carried out according to the following steps:

[0015] Step 1. Firstly, install the stop lock piece 7 and the wedge lock piece 6 in the lock groove 2 of the last blade, and repair the inclined surface 8 where the stop lock piece 7 and the wedge lock piece 6 fit together to ensure the coloring inspection The fitting degree is greater than 70%, draw two section lines between the two parallel planes of the stop lock piece 7 and the wedge lock piece 6, measure and record the width between the two section lines as A1 and A2, and repair repeatedly Stop the inclined surface 8 where the lock piece 7 and the wedge lock piece 6 fit together until A1=A2=A, and record the measured width as A;

[0016] Step 2: Install the final blade 3 in the toothed blade root groove 1, install the to...

specific Embodiment approach 2

[0023] Specific implementation mode two: the final lock piece 4 in step six is ​​cooled with liquid nitrogen. With such setting, the freezing is fast and the cooling effect is good. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific implementation mode three: combination Figure 12 To illustrate, in step seven of this embodiment, the top of the wedge-shaped lock piece 6 is first bent to 45°. Such setting ensures that the wedge-shaped lock piece 6 does not break when bent, which meets actual needs. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses an assembling method for a final blade locking piece of a toothed blade root of a steam turbine rotor, relates to an assembling method for moving blades of the toothed blade root of the steam turbine rotor, and aims at solving the problem that assembling position precision, safety and assembling quality of the final blade locking piece of the toothed blade root of the steam turbine rotor cannot be ensured. The method is performed according to the following steps: firstly, performing repair and replacement supply on an inclined plane formed by mutual attaching of a stop locking piece and a wedge-shaped locking piece; secondly, performing trial assembly of a final blade in a toothed blade root groove; thirdly, scribing horizontal lines on the end faces of the final blade and the toothed locking piece along the axial direction of the rotor; fourthly, measuring axial widths of a final blade locking groove and the toothed blade root groove; fifthly, assembling the toothed locking piece and the stop locking piece into the locking groove, accurately grinding the thickness of the final blade, and driving the final blade into the toothed blade root groove; sixthly, driving a final assembly locking piece; and seventhly, bending the top of the wedged locking piece, and placing a bent section of the wedged locking piece into a cavity in the top of the wedged locking piece by using a copper hammer.

Description

technical field [0001] The invention relates to a steam turbine rotor tooth-shaped blade root moving blade assembly method, which belongs to the technical field of steam turbine assembly. Background technique [0002] When the steam turbine rotor toothed blade root moving blade is assembled, the locking opening of the final blade is an inverted T-shaped structure, and there are more than 5 locking pieces, and the locking method is special. When assembling the locking parts of the final blade, due to the complex structure and large number of locking parts, if the assembly method is improper, it is difficult to control the relative position accuracy of the tooth-shaped locking parts after assembly. At the same time, the locking method of the locking parts is special, and the locking parts Bending method is used to lock, if the bending method is improper, the lock piece cannot be bent or cracks will appear after bending. If the assembly method is improper, it will cause the lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D5/32
CPCF01D5/32F05D2230/60
Inventor 孙英娣杨春斌郝丹姜荣恒刘俊峰杨一鸣杜野李仁志
Owner HARBIN TURBINE
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