Tool for measuring position of back-cut angle slope position of mushroom-type root

Abstract

The invention provides a tool for measuring the back-cut angle slope position of a mushroom-type root, and can solve problems that a conventional tool for measuring the back-cut angle slop position ofthe mushroom-type blade root is more complex in structure and is easy to cause personal errors and the precision of a measurement result is affected by the personal errors. The tool comprises a rootsupporting seat, a first positioning block, and a second positioning block. The top surface of the root supporting seat is provided with a first supporting inclined plane and a second supporting inclined plane, and the inclined angle between the first supporting inclined plane and the bottom surface of the root supporting seat is equal to the inclined angle between a back-cut angle slope and the back radial surface of the mushroom-type root. The first supporting inclined plane is used for supporting the back radial surface of the mushroom-type root. The second supporting inclined plane is perpendicular to the first supporting inclined plane, and is used for supporting a steam incoming edge of the mushroom-type root. The first positioning block and the second positioning block are respectively installed on the front side surface of the root supporting seat, and are respectively used for leaning against the two stepped surfaces of the mushroom-type root. The back-cut angle of the mushroom-type root extends backwards and extends out of the root supporting seat.

Description

technical field [0001] The invention relates to the field of measuring tools for fungus-shaped blade roots of steam turbine blades, in particular to a measuring tool for measuring the slope position of the back-hacking angle of fungus-shaped blade roots. Background technique [0002] According to the shape of the blade root, the blade root of the steam turbine blade can be roughly divided into four types, namely the fungus-shaped blade root, T-shaped blade root, fork-shaped blade root and vertical tree-shaped blade root. figure 1 Shown is a fungus-type leaf root, wherein, 1 is the step surface of the leaf root, 2 is the steam inlet edge, 3 is the back radial surface, 4 is the back split angle, and A is the opening size of the leaf root. The back-splitting angle is used for the assembly of the mushroom-shaped blade root, and the positional accuracy of the slope 41 of the back-splitting angle directly affects the subsequent assembly accuracy of the blade. [0003] The existin...

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention provides a measuring tool for measuring the position of the slope of the back-hipping angle of the fungus-type leaf root, which can solve the problem that the structure of the measuring tool for the position of the slope of the back-hipping angle of the existing fungus-type blade root is relatively complicated and prone to Human errors, problems that affect the accuracy of measurement results

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