Measuring tool for measuring dimensional tolerance between carrying surface and reference surface of fir-type race of steam turbine rotor and measuring method of measuring tool

A steam turbine rotor and dimensional tolerance technology, which is applied in the field of steam turbine processing, can solve the problems that general measuring tools cannot be measured, and achieve the effect of ensuring machining accuracy

Active Publication Date: 2013-08-28
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the dimensional tolerance from the bearing surface of the fir-tree-shaped wheel groove of the steam turbine rotor to the reference surface cannot be measured with a general measurin

Method used

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  • Measuring tool for measuring dimensional tolerance between carrying surface and reference surface of fir-type race of steam turbine rotor and measuring method of measuring tool
  • Measuring tool for measuring dimensional tolerance between carrying surface and reference surface of fir-type race of steam turbine rotor and measuring method of measuring tool

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Experimental program
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Example Embodiment

[0019] Specific implementation mode 1. Combination figure 1 This specific embodiment will be described. A steam turbine rotor fir-tree-shaped wheel groove bearing surface to the reference plane dimensional tolerance measuring tool, the measuring tool includes an adjusting nut 1, a sample column 2, a clamping positioning part 3, a hexagon socket head screw 4, a micrometer head 5, screw 6 and set screw 7;

[0020] The adjusting nut 1 is set on the sample column 2, and the two are threaded, and the position of the adjusting nut 1 and the sample column 2 is fixed by the set screw 7;

[0021] The clamping positioning part 3 is installed on the top of the sample column 2, the lower end surface of the clamping positioning part 3 is closely connected with the upper end surface of the sample column 2, and the two are fixedly connected by a hexagon socket head cap screw 4,

[0022] There is a micrometer screw hole on the clamping locator 3, the micrometer head 5 is installed on the cl...

Example Embodiment

[0023] Specific embodiment two, combine figure 2 This specific embodiment will be described. Based on the measurement method of a steam turbine rotor fir-tree-shaped wheel groove bearing surface to the reference surface dimensional tolerance measuring device described in the first specific embodiment, the method includes the following steps:

[0024] Step 1: Zeroing the gauge;

[0025] The process of zeroing the measuring tool is to combine the bearing surface of the fir tree-shaped wheel groove to the measuring tool for the size tolerance of the reference surface, so that the upper surface of the adjusting nut 1 is closely connected with the reference surface of the sample column 2, and the set screw 7 is tightened; Loosen screw 6 to adjust micrometer head 5, when the screw rod of micrometer head 5 is in contact with the upper end surface of adjustment nut 1, adjust the reading of micrometer head 5 to be zero;

[0026] Step 2: Measure the dimensional tolerance;

[0027] T...

Example Embodiment

[0030] Embodiment 3. This embodiment is different from Embodiment 2 in that the dimensional tolerance from the bearing surface of the fir tree-shaped wheel groove to the reference plane in step 3 is -0.1 to 0.

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Abstract

The invention discloses a measuring tool for measuring dimensional tolerance between a carrying surface and a reference surface of a fir-type race of a steam turbine rotor and a measuring method of the measuring tool and belongs to the technical field of steam turbine processing. The invention aims to solve the problem that the dimensional tolerance between the carrying surface and the reference surface of the fir-type race of the steam turbine rotor cannot be measured by adopting a general measuring tool. The measuring tool comprises an adjusting nut, a specimen column, a clamping locating piece, a hexagon socket cap screw, a micrometer head, a screw piece and a set screw. The measuring method of the measuring tool comprises the following steps: zeroing the measuring tool, measuring the dimensional tolerance, and acquiring the dimensional tolerance. The measuring tool and measuring method disclosed by the invention can be widely applied to measuring the dimensional tolerance between the carrying surface and the reference surface of the fir-type race of the steam turbine rotor.

Description

technical field [0001] The invention relates to a method for measuring the dimensional tolerance from the bearing surface of a fir tree-shaped wheel groove of a steam turbine rotor to a reference plane, and belongs to the technical field of steam turbine processing. Background technique [0002] When processing the fir-tree-shaped groove on the rotor impeller of a steam turbine, a set of forming milling cutters is often used for processing because the dimensional tolerance of the fir-tree-shaped groove of the rotor is very high. The dimensional tolerance requirements of the fir tree-shaped wheel groove profile line from the bearing surface to the reference plane are generally within 0 to -0.1, and the wheel channel profile line reference plane is located on the processed wheel channel end surface. In order to ensure the dimensional tolerance from the load-bearing surface of the wheel groove to the reference surface, the last profile fine milling cutter is assembled with the ...

Claims

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Application Information

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IPC IPC(8): G01B21/00
Inventor 孙英娣谢方明王淑琴姜东全郝丹王刚李文明朱树龙
Owner HARBIN TURBINE
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