Turbine guider channel area measuring instrument

A turbine guider and measuring instrument technology, applied in the field of measuring instruments, can solve the problems of inaccurate measurement of the channel cross-sectional area of ​​the turbine guider of the aeroengine, debugging of the aeroengine, adverse effects of detection work, large differences in density and resistance, etc., and achieve Stable and reliable measurement results, improved labor efficiency, and improved measurement accuracy

Active Publication Date: 2015-11-11
成都国营锦江机器厂
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The channel cross-sectional area of ​​the aero-engine turbine guide is directly related to the air flow of the aero-engine, and the air flow has a significant impact on the performance of the aero-engine. In the currently known measurement of the channel cross-sectional area, the test of the liquid flow at a specified pressure is often used instead, and the liquid flow is considered to be It is the air flow rate, and the water flow rate is generally used instead of the air flow rate, but the density and resistance of the water medium and the air medium are quite different, and the water flow rate is not equal to the air flow rate; or a feeler gauge is inserted into the channel section, and the feeler gauge can pass through, it is considered as a turbine guide The cross section of the channel can meet the requirements of use, but it is relatively rough to check with a feeler gauge, and the measurement accuracy is not high, so only a rough range can be obtained
The above two methods cannot accurately measure the cross-sectional area of ​​the aero-engine turbine guide channel, which will have a negative impact on the later debugging and testing of the aero-engine.
Chinese patent CN103438793 discloses a device for measuring the throat area of ​​an aero-engine guide, but the device is complex, cumbersome to operate, high in use and manufacturing costs, and the final result is the measured distance value rather than the area value , to obtain the area value, a subsequent calculation is required

Method used

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  • Turbine guider channel area measuring instrument
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  • Turbine guider channel area measuring instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Such as Figures 1 to 7 As shown, a turbine guide channel area measuring instrument includes a measuring unit, the measuring unit includes a measuring part, a displacement sensor and a pressing part, the displacement sensor is arranged above the end of the measuring part, and the measuring part is arranged below the end The pressing part drives the measuring part to move, and the measuring part drives the displacement sensor to move (such as figure 1 shown).

[0077] Further, the measuring part is a clip-type structure, including a movable side 2 and a fixed side 1 .

[0078] Furthermore, the displacement sensor is arranged above the end of the movable side 2 .

[0079] Furthermore, a torsion spring 3 is arranged between the movable side 2 and the fixed side 1 .

[0080] Furthermore, the lever on one side of the torsion spring 3 bears against the movable side 2 , and the lever on the other side bears against the fixed side 1 .

[0081] Furthermore, the fixed side 1 ...

Embodiment 2

[0127] Embodiment 2: A Calculation Method for the Cross-sectional Area of ​​the Turbine Guide Channel

[0128] The formula for calculating the cross-sectional area of ​​a single channel of a turbine guide is as follows:

[0129] Si=h×[(A1+A2+A3) / 3+(A3-A1)(2×h1+2×h2-h)] / (4×h2)];

[0130] The cross-sectional area of ​​the turbine guide channel is:

[0131] S=Ci×Si

[0132] Among them: Si is the cross-sectional area of ​​the current channel, Ci is the number of current measurement channels, and S is the area sum;

[0133] Take the blade exhaust edge as the positioning surface, set three measurement points B1, B2, B3, and take the blade exhaust edge as the reference, the distances from the three points B1, B2, B3 to the exhaust edge are h1, h1 in turn +h2, h1+h2+h2 (such as Figure 4 shown), the section widths of the turbine guide channel at the three points B1, B2, and B3 are A1, A2, and A3 respectively, h is the total length of the channel section of the turbine guide, and t...

Embodiment 3

[0135] Embodiment 3: A Calculation Method for the Cross-sectional Area of ​​the Turbine Guide Channel

[0136] The only difference from Embodiment 2 is that the measuring instrument of any of the above-mentioned embodiments is used for measurement, wherein the measuring parts of the three measuring units correspond to the measuring points B1, B2, and B3 respectively, and all the fixed probes are connected with The fixed measuring points are attached, all the floating probes are attached to the floating measuring points, and the distance between the fixed measuring points and the floating measuring points is transmitted to the three parallel displacement sensors, which are the measured A1, A2, A3, the distance measured by the fourth lever and the end on the fixed side of the adjacent measurement part is transmitted to the fourth displacement sensor, which is the measured h value,

[0137] Wherein, the limit block is in contact with the exhaust edge of the blade during measureme...

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Abstract

The invention relates to a turbine guider channel area measuring instrument. The turbine guider channel area measuring instrument comprises measuring units; the measuring unit includes a measuring portion, a displacement sensor and a pressing portion, wherein the displacement sensor is arranged above the tail end of the measuring portion, the pressing portion is arranged below the tail end of the measuring portion, the pressing portion drives the measuring portion to move, and the measuring portion drives the displacement sensor to move. According to the turbine guider channel area measuring instrument of the invention, the lengths of four corresponding sides of each channel are measured, and the lengths are introduced into an area computational formula; area computation can be carried out based on single-chip microcomputer programming, so that the cross-sectional area of each channel can be computed; and the cross-sectional areas of all the channels are added together, and the sum of the cross-sectional areas of all the channels is the total area of the channel of a turbine guider.

Description

technical field [0001] The invention belongs to the field of measuring instruments and relates to a measuring instrument for the channel area of ​​a turbine guider. Background technique [0002] The channel cross-sectional area of ​​the aero-engine turbine guide is directly related to the air flow of the aero-engine, and the air flow has a significant impact on the performance of the aero-engine. In the currently known measurement of the channel cross-sectional area, the test of the liquid flow at a specified pressure is often used instead, and the liquid flow is considered to be It is the air flow rate, and the water flow rate is generally used instead of the air flow rate, but the density and resistance of the water medium and the air medium are quite different, and the water flow rate is not equal to the air flow rate; or a feeler gauge is inserted into the channel section, and the feeler gauge can pass through, it is considered as a turbine guide The cross-section of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/28
CPCG01B21/28
Inventor 李小焰
Owner 成都国营锦江机器厂
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