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A rapid measurement method for the runout of the trailing edge of the guide vane based on three coordinates

A technology of three-coordinate measurement and measurement method, which is applied to measurement devices, instruments, etc., can solve the problems affecting the deployment of turbine guides, the progress of assembly and commissioning, the performance of the whole engine, the difficulty of aligning the end face of the central axis, and the human error of aligning and leveling. To achieve the effect of reducing labor intensity of workers, stable measurement and calculation, and reducing measurement error

Active Publication Date: 2018-10-09
BEIJING CISRI GAONA TECH
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Problems solved by technology

Due to casting differences in the flow channel and end face of the guider, it is difficult to align the central axis and find the average of the end face, and there are corresponding human errors in the alignment and leveling process
Therefore, the measured trailing edge beating has a large error
In addition, the high cost of special tooling, high labor intensity, poor measurement repeatability, and low efficiency seriously affect the deployment of turbine guides, the progress of assembly and test runs, and the overall performance of the engine.

Method used

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  • A rapid measurement method for the runout of the trailing edge of the guide vane based on three coordinates
  • A rapid measurement method for the runout of the trailing edge of the guide vane based on three coordinates
  • A rapid measurement method for the runout of the trailing edge of the guide vane based on three coordinates

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Embodiment Construction

[0042] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principle of the present invention.

[0043] The method of the present invention is used to measure the runout of the trailing edge of a guider containing 19 blades.

[0044] Step 1, clamp the workpiece, select three blades among the blades of the guide: the first blade, the eighth blade, and the fourteenth blade; the angle between the selected three blades is less than or equal to 180° and greater than 60° ;Place the leading edge of the selected blade on the platform 1, rotate the guide to make the selected blade tangent to the positioning pin 3; set the inclined cone 6 on the base 5, and tighten the locking bolt 7, and ensure that the locking is tightened When the bolt is 7, the blade sel...

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Abstract

The invention relates to a guider blade trailing edge runout amount rapid measuring method based on a three-coordinate measuring machine. The method is characterized by, to begin with, clamping workpieces; selecting a first blade in guider blades, and roughly establishing a coordinate system based on the first blade; measuring a guider flange end surface and an outer channel through a manual mode and an automatic mode in sequence; scanning the selected blade back section, and precisely establishing a coordinate system; scanning the blade trailing edge sections in sequence through sequential coordinate system transformation; extracting axial and angular extreme values, and obtaining axial runout and angular runout; and finally, outputting the result, and judging whether the assembly is qualified according to the result. The method does not need special tools, is simple to operate and saves labor; calculation precision is high; measurement has repeatability; and stability is good.

Description

technical field [0001] The invention relates to the technical field of a method for measuring the runout of the trailing edge of a guide vane, in particular to a method for rapidly measuring the runout of the trailing edge of a guide vane based on three coordinates. Background technique [0002] The runout of the trailing edge of the turbine guide blade includes axial runout and angular runout, which are two important parameters that can best characterize the size of the exhaust throat of the guider, and are important parameters that affect the aerodynamic performance and working stability of the guider , there are strict requirements on the two parameters in the design and production of the guide. Its value directly affects the flow rate, thrust, speed, efficiency, etc. of the engine, and is an important parameter to determine the overall performance of the engine. [0003] At present, in actual production, two kinds of special tooling are mostly used to test the axial and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00
CPCG01B21/00
Inventor 王燕坡谢秋峰孙闯孔胜国吴剑涛李俊涛
Owner BEIJING CISRI GAONA TECH
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