CN114910030A - Method for measuring throat distance of multi-connected blade - Google Patents
Method for measuring throat distance of multi-connected blade Download PDFInfo
- Publication number
- CN114910030A CN114910030A CN202210540371.3A CN202210540371A CN114910030A CN 114910030 A CN114910030 A CN 114910030A CN 202210540371 A CN202210540371 A CN 202210540371A CN 114910030 A CN114910030 A CN 114910030A
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- China
- Prior art keywords
- sample curve
- line segments
- scanning line
- line segment
- throat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/28—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring areas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a method for measuring throat distance of a multi-connected blade, which comprises the following steps: establishing a coordinate system A1 by adopting an iterative method; determining a scanning line segment I and a scanning line segment II between two adjacent blades; scanning the scanning line segment I and the scanning line segment II to obtain a sample curve I and a sample curve II; connecting points on the first sample curve and points on the second sample curve to form a plurality of line segments; continuously comparing the lengths of the line segments by using a method of sleeving a large loop with a small loop, and analyzing a minimum value; extracting the numerical value by using the structural characteristics according to the calculated minimum value; according to the invention, two scanning line segments are found out from two adjacent blades, different line segments are formed according to points on the two scanning line segments, and the line segments are compared with each other, so that the minimum value is extracted, the minimum throat length is obtained, the throat area can be accurately calculated, the influence of blade deformation is avoided, and the measurement precision of the throat area is improved.
Description
Technical Field
The invention relates to the technical field of throat detection of a multi-connected blade, in particular to a method for measuring the distance of a throat of a multi-connected blade.
Background
The throat area between two blades needs to be detected in the existing precise multi-connected blade casting, and stable operation of gas and fluid passing through the throat is ensured. The throat area is an important parameter of the blade and directly relates to the use performance of the blade. The minimum distance of the throat needs to be measured in the calculation of the area of the throat, the minimum distance of the throat is mostly measured and detected through three-coordinate fixed point measurement at present, if the blade is deformed, the detection of the former locating point is inaccurate, the error of the detection result is large, the accurate measurement value cannot be obtained, and the calculation precision of the area of the throat is further influenced.
Disclosure of Invention
The invention mainly aims to provide a method for measuring the throat distance of a multi-connected blade, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for measuring throat distance of a multi-connected blade comprises the following steps:
1) establishing a coordinate system A1 of the actual multi-connected blade by adopting an iterative method;
2) determining a first scanning line segment and a second scanning line segment corresponding to a minimum throat area between two adjacent blades of the multi-connected blade;
3) scanning the scanning line segment I and the scanning line segment II through three coordinates to obtain a sample curve I and a sample curve II;
4) connecting points on the first sample curve and points on the second sample curve to form a plurality of line segments;
5) continuously comparing the lengths of the line segments by using a method of sleeving a large circulation with a small circulation, and analyzing a minimum value;
6) from the calculated minimum, the values are extracted using the formation features.
Preferably, M construction points are selected on the first sample curve in the step 3), N construction points are selected on the second sample curve, and the formed line segment is M × N.
Preferably, 20 construction points are selected from the first sample curve in the step 3), 25 construction points are selected from the second sample curve, 500 line segments are formed, and 500 line segments are compared with each other by using a program to finally obtain a shortest line segment.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, two scanning line segments are found out from two adjacent blades, different line segments are formed according to points on the two scanning line segments, and the line segments are compared with each other, so that the minimum value is extracted, the minimum throat length is obtained, the throat area can be accurately calculated, the influence of blade deformation is avoided, and the measurement precision of the throat area is improved.
Drawings
FIG. 1 is a schematic view of selected scan lines of adjacent blades of the present invention.
In the figure: 1. a blade; a. scanning a line segment I; b. and scanning the line segment two.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1, a method for measuring throat distance of a multiple blade includes the following steps:
1) establishing a coordinate system A1 of the actual multi-connected blade by adopting an iterative method;
2) determining a first scanning line segment a and a second scanning line segment b corresponding to a minimum throat area between two adjacent blades of the multi-connected blade;
3) the cross section of the two segments H9 of the scan line segment I and the scan line segment II is scanned by three coordinates,
4) connecting the point on the first sample curve with the point on the second sample curve, selecting 20 construction points on the first sample curve, selecting 25 construction points on the second sample curve, and forming 500 line segments;
5) and continuously comparing the lengths of the line segments by using a method of sleeving a large loop with a small loop, and analyzing a minimum value.
6) Extracting the numerical value by using the structural characteristics according to the calculated minimum value;
the method can be used for quickly calculating the throat distance of the multi-blade of the aviation blade, has high technical precision, plays a decisive role in debugging parameters of the aviation blade and testing the performance of an aero-engine, can accurately calculate the throat area, does not influence the calculation and measurement result even if two blades deform, can accurately calculate the throat area, is not influenced by any external factors, and improves the measurement precision of the throat area.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (3)
1. A method for measuring throat distance of a multi-connected blade is characterized by comprising the following steps: the method comprises the following steps:
1) establishing a coordinate system A1 of the actual multi-connected blade by adopting an iterative method;
2) determining a first scanning line segment and a second scanning line segment corresponding to a minimum throat area between two adjacent blades of the multi-connected blade;
3) scanning the scanning line segment I and the scanning line segment II through three coordinates to obtain a sample curve I and a sample curve II;
4) connecting points on the first sample curve and points on the second sample curve to form a plurality of line segments;
5) continuously comparing the lengths of the line segments by using a method of sleeving a large circulation with a small circulation, and analyzing a minimum value;
6) from the calculated minimum, the values are extracted using the formation features.
2. The method for measuring the throat distance of the multi-connected blade as claimed in claim 1, wherein: and 4) selecting M construction points on the first sample curve, selecting N construction points on the second sample curve, and forming M x N line segments.
3. The method for measuring the throat distance of the multi-connected blade as claimed in claim 1, wherein: in the step 4), 20 construction points are selected on the first sample curve, 25 construction points are selected on the second sample curve, and 500 line segments are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210540371.3A CN114910030A (en) | 2022-05-17 | 2022-05-17 | Method for measuring throat distance of multi-connected blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210540371.3A CN114910030A (en) | 2022-05-17 | 2022-05-17 | Method for measuring throat distance of multi-connected blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114910030A true CN114910030A (en) | 2022-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210540371.3A Pending CN114910030A (en) | 2022-05-17 | 2022-05-17 | Method for measuring throat distance of multi-connected blade |
Country Status (1)
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333855A (en) * | 2014-12-17 | 2016-02-17 | 中国航空工业集团公司沈阳发动机设计研究所 | Method for measuring and calculating areas of turbine guide vane and guider throat |
| CN106940177A (en) * | 2017-02-13 | 2017-07-11 | 中国航发沈阳发动机研究所 | A kind of turborotor half window throat area measuring method |
| CN108132038A (en) * | 2017-12-08 | 2018-06-08 | 中国航发动力股份有限公司 | A kind of device and method for measuring turborotor venturi minimum area |
| CN112507489A (en) * | 2020-12-02 | 2021-03-16 | 中国航发沈阳发动机研究所 | Turbine guide blade and guide device throat area calculation method |
| CN113927108A (en) * | 2021-11-10 | 2022-01-14 | 中国航发南方工业有限公司 | Closed flow passage processing method of two-dimensional bending moment radial diffuser |
-
2022
- 2022-05-17 CN CN202210540371.3A patent/CN114910030A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333855A (en) * | 2014-12-17 | 2016-02-17 | 中国航空工业集团公司沈阳发动机设计研究所 | Method for measuring and calculating areas of turbine guide vane and guider throat |
| CN106940177A (en) * | 2017-02-13 | 2017-07-11 | 中国航发沈阳发动机研究所 | A kind of turborotor half window throat area measuring method |
| CN108132038A (en) * | 2017-12-08 | 2018-06-08 | 中国航发动力股份有限公司 | A kind of device and method for measuring turborotor venturi minimum area |
| CN112507489A (en) * | 2020-12-02 | 2021-03-16 | 中国航发沈阳发动机研究所 | Turbine guide blade and guide device throat area calculation method |
| CN113927108A (en) * | 2021-11-10 | 2022-01-14 | 中国航发南方工业有限公司 | Closed flow passage processing method of two-dimensional bending moment radial diffuser |
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