A gas turbine power turbine guide vane datum plane positioning processing method

A technology for power turbines and gas turbines, applied in metal processing equipment, metal processing machinery parts, manufacturing tools, etc., can solve the problem of inconsistency in the assembly and positioning of steam passages and steam passage arcs, damage to the steam passages, and failure to ensure blade roots and blade tops Problems such as the accuracy of the steam outlet plane drop and the arc arc of the steam channel have achieved the effects of stable processing, improved efficiency, and improved geometric accuracy.

Active Publication Date: 2016-06-15
HARBIN TURBINE +1
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AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of inconsistency in assembly and positioning of the steam passage and the arc of the steam passage during the positioning process of the guide vane of the existing gas turbine power turbine, which cannot ensure the accurate drop of the steam outlet side plane of the blade root and the blade tip and the accuracy of the arc of the steam passage. In order to solve the problem of damage to the steam passage, a method for positioning and processing the reference plane of the guide vane of the gas turbine power turbine is provided

Method used

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  • A gas turbine power turbine guide vane datum plane positioning processing method
  • A gas turbine power turbine guide vane datum plane positioning processing method
  • A gas turbine power turbine guide vane datum plane positioning processing method

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specific Embodiment approach 1

[0017] Specific implementation mode one: combine Figure 1-Figure 6 Explain that a gas turbine power turbine guide vane datum plane positioning processing method of the present embodiment is carried out according to the following steps:

[0018] Step 1, using a measuring tool to find four points 30 on the blade root surface of the gas turbine power turbine guide vane blank 9, and measure the size between the four points, and the drop of the four points relative to the same reference plane;

[0019] Step 2, measure the size of the margin of the arc on the steam outlet side of the gas turbine power turbine guide vane blank 9, and make a record;

[0020] Step 3: Put the blank 9 of the guide vane of the gas turbine power turbine on the clamping and positioning device, and use a feeler gauge to measure the first positioning seat 12, the second positioning seat 13, the third positioning seat 14, the fourth positioning seat 15, and the fifth positioning seat The six positioning poin...

specific Embodiment approach 2

[0036] Specific implementation mode two: combination figure 2 and image 3 Note that in step 4 of this embodiment, the blank of the guide vane of the gas turbine power turbine is raised by 0.3mm. This setting ensures that when the guide vane is clamped during processing, the steam passage of the guide vane cannot be damaged and the steam passage is protected. Practice has proved that the thickness of 0.3mm is just enough. Others are the same as in the first embodiment.

[0037] work process

[0038] The present invention is used for precision casting guide vanes of gas turbine power turbines, mainly through measuring tools to find four points on the drop surface of the arc margin on the rough surface of the turbine guide vanes of gas turbines, and using a dial gauge to pass four points on the CNC machine tool. Point alignment and the exact position of the measuring tool, adjust the auxiliary lifting and adjusting support device to convert the benchmark, avoiding the indent...

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Abstract

The invention provides a positioning and machining method for a datum plane of a guide vane of a power turbine of a gas turbine, and relates to positioning and machining methods of datum planes of guide vanes. The positioning and machining method aims to solve the problems that in an existing positioning and machining process of a guide vane of a power turbine of a gas turbine, a steam passage and a steam passage arc are assembled and positioned inconsistently, a gap between a steam discharge plane of a vane root and a steam discharge plane of a vane top cannot be guaranteed, accuracy of the steam passage arc cannot be guaranteed, and the steam passage is damaged. The positioning and machining method mainly comprises the following steps that firstly, four points are found on a vane root surface of a blank of the guide vane of the power turbine of the gas turbine through a measuring tool; secondly, the margin of an arc on the steam discharge side of the blank of the guide vane of the power turbine of the gas turbine is measured; thirdly, six positioning points corresponding to a first positioning base, a second positioning base, a third positioning base, a fourth positioning base, a fifth positioning base and a sixth positioning base are measured through a feeler gauge. The method is used for positioning and machining of the datum plane of the guide vane of the power turbine of the gas turbine.

Description

technical field [0001] The invention relates to a positioning processing method of a reference plane of a guide vane. Background technique [0002] Gas turbine power turbine guide vanes are precision casting blades with special materials, high hardness, special shape, and large steam passage surface. Its assembly is based on the positioning of the working part of the steam passage after pouring and processing of other assembly parts, including blade roots, Blade crown, inlet and outlet steam side planes, etc., in processing and assembly, it is also necessary to ensure that the steam passage of the working part (the steam passage will not be processed after pouring) is consistent. The processing reference plane includes the difference between the blade root and the blade top steam outlet plane The processing of the outer arc process has a certain influence on its position relative to the steam channel. Therefore, it is necessary to locate the steam passage and the circular a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/22B23Q17/20
CPCB23Q15/22B23Q17/003
Inventor 李辉闫智宏徐玉宝张义彬刁建平柴晓辉孙柯郭伟沈宏伟
Owner HARBIN TURBINE
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