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Fir tree type blade root blade molded line measurement fixing clamp

A technology of blade profiles and fixing fixtures, which is applied in the field of steam turbines, can solve problems such as inaccurate measurement of the blade shroud assembly surface, and achieve the effect of avoiding deflection

Pending Publication Date: 2022-04-12
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of inaccurate measured value of the blade shroud assembly surface when the original measuring tool measures the molding line due to the influence of the dimensional tolerance between the tip hole of the blade and the center line of the blade root being ±0.1mm when the horizontal measuring tool is used for the steam turbine blade, the present invention further provides A fixed jig for measuring fir tree-shaped blade root and blade profile

Method used

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  • Fir tree type blade root blade molded line measurement fixing clamp
  • Fir tree type blade root blade molded line measurement fixing clamp
  • Fir tree type blade root blade molded line measurement fixing clamp

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0015] Specific implementation mode one: combine Figure 1-Figure 4 To illustrate this embodiment, the fir-tree-shaped blade root blade profile measurement fixture includes a blade root positioning seat 1, a tightening bolt 2, a measuring body 3 and a tooth block 8; the measuring body 3 is vertically arranged, and the blade The root positioning seat 1 is installed on the top of the measuring body 3, the tooth block 8 is embedded on the blade root positioning seat 1, and the threaded connection of the tightening bolt 2 is installed on the blade root positioning seat 1, and the threaded end of the tightening bolt 2 pushes On the upper end face of the tooth block 8 , the fir tree-shaped blade root is vertically installed on the blade root positioning seat 1 and the tooth block 8 .

[0016] The tooth block 8 of the present application uses the existing positioning tooth block to perform wire cutting on the second tooth along the figure below, and spot welds both sides of the cut t...

specific Embodiment approach 2

[0017] Specific implementation mode two: combination figure 2 Describe this embodiment, a fir tree-shaped blade root blade profile measurement fixture described in this embodiment, it also includes an L-shaped fixed block 4; Other compositions and connection methods are the same as those in Embodiment 1.

specific Embodiment approach 3

[0018] Specific implementation mode three: combination image 3 Illustrate this embodiment, a kind of fir-tree type blade root blade profile line measuring fixture described in this embodiment, it also comprises fixing frame 7 and two fixing bolts; Two fixing bolts are installed on the fixing frame 7, and fixing bolt amount The concrete 3 and the L-shaped fixed block 4 are fixedly connected by the fixed frame 7, and the threaded end of the fixed bolt abuts on the L-shaped fixed block 4. Other compositions and connection methods are the same as those in the second embodiment.

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Abstract

The invention discloses a fir tree type blade root blade molded line measurement fixing clamp, relates to a steam turbine blade clamp, and aims to solve the problem that a measurement value of a blade crown assembly surface is inaccurate when a molded line is measured by an original measuring tool due to the fact that a horizontal measuring tool is adopted for a steam turbine blade and the dimensional tolerance between a blade center hole and a blade root center line is + / -0.1 mm. The tool comprises a blade root positioning seat, a puller bolt, a measuring tool body and a tooth block. The measuring tool body is vertically arranged, the blade root positioning seat is installed at the top end of the measuring tool body, the tooth block is embedded in the blade root positioning seat, the puller bolt is installed on the blade root positioning seat in a threaded connection mode, the threaded end of the puller bolt abuts against the upper end face of the tooth block, and the fir-shaped blade root is vertically installed on the blade root positioning seat and the tooth block. The invention belongs to the field of turbines.

Description

technical field [0001] The invention relates to a steam turbine blade fixture, in particular to a fir-tree-shaped blade root blade profile line measuring and fixing fixture, which belongs to the field of steam turbines. Background technique [0002] The steam turbine blade of a certain unit on the existing steam turbine has a total length of 450mm and a steam passage length of 380mm. The previous profile detection method is horizontal measurement, which is positioned by the inner tooth shape and clamped by the back tooth shape. The measurement is carried out by pressing the thimble on the top of the blade crown, but due to the influence of datum conversion and other factors in the processing of the tooth profile of the blade root and the thimble hole, the achievable dimensional tolerance between the blade thimble hole and the centerline of the blade root is ±0.1mm, while the tolerance of the distance between the crown line and the center line is only ±0.05mm, which leads to ...

Claims

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Application Information

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IPC IPC(8): G01B5/00B25B11/00
CPCY02E10/72
Inventor 孙珂李变弟车德健杨世超齐琳倩周浩孙一然张锡成王海东
Owner HARBIN TURBINE