CN117268315A - Method for detecting throat area of turbine guide vane - Google Patents
Method for detecting throat area of turbine guide vane Download PDFInfo
- Publication number
- CN117268315A CN117268315A CN202210666844.4A CN202210666844A CN117268315A CN 117268315 A CN117268315 A CN 117268315A CN 202210666844 A CN202210666844 A CN 202210666844A CN 117268315 A CN117268315 A CN 117268315A
- Authority
- CN
- China
- Prior art keywords
- detection
- throat
- detection point
- throat area
- turbine guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 128
- 238000003708 edge detection Methods 0.000 claims description 23
- 238000005259 measurement Methods 0.000 claims description 7
- 238000013461 design Methods 0.000 abstract description 10
- 238000012360 testing method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a method for detecting the throat area of a turbine guide vane, which comprises the following steps of S1, selecting a plurality of detection sections on the radial height of a throat area window of a turbine guide vane; s2, determining a throat detection point on the detection section; s3, setting a throat height detection point on a throat area window of the turbine guider; s4, measuring the throat area of the turbine guide in a state that the turbine guide is assembled into a whole ring. By adopting the throat area detection method, the deviation of the actual throat area and the design state can be detected rapidly, and meanwhile, the position of the throat characteristic point can be adjusted in real time according to the actual blade size and the tail edge shape, so that the accuracy of detecting the throat position and the throat area can be improved. Therefore, the method provided by the patent can reduce the detection cost and is convenient for engineering application.
Description
Technical Field
The invention relates to the technical field of turbine guide vane area detection, in particular to a method for detecting the throat area of a turbine guide vane.
Background
The throat area of the turbine guide determines the turbine flow capacity and is an important parameter affecting the performance matching of various parts of the aero-engine. At the same time, the throat area of each row of blades of the turbine component determines the pressure drop distribution of the fuel gas in each row of blades, thereby affecting the aerodynamic performance of the turbine component.
The actual vane throat area tends to deviate from the design target due to machining and assembly variances. For the whole engine, the deviation of the throat area of the turbine guide from design can cause the parts of the engine to work in an off-design state; for the turbine component, the deviation of the throat area of each row of blades changes the pressure drop distribution of each stage of blades of the turbine, so that the aerodynamic performance of the turbine deviates from the design, the cooling air flow of the blades is reduced or the risk of gas backflow occurs due to the sealing of the rotor rim is increased, and the aerodynamic efficiency and the working reliability of the turbine component are reduced.
The turbine guide assembly consists of tens of blades in the circumferential direction, the root of each blade is integrated with the inner edge plate, the tip of each blade is integrated with the outer edge plate, the minimum area formed by each blade and the inner edge plate is the throat area, and after the turbine guide assembly is assembled into a full-circle state, the throat area between each blade is usually measured. In the development process of the engine, the actual flow is required to be checked through an air flow test and used for supporting the engine test, meanwhile, the relationship between the actual throat area of the blade and the flow is acquired, after certain test data are accumulated, the actual flow of the turbine can be accurately analyzed only through the detection of the throat area of the blade without the test, so that the development cost is reduced, and a simple, convenient and effective turbine guide blade throat area measurement method is an important means for achieving the aim.
In order to obtain higher aerodynamic heating power and structural strength performance, the turbine guide vane is in a complicated three-dimensional shape in space, so that a throat area window formed between vanes in the circumferential direction is also a complicated three-dimensional space curved surface, the real throat area is difficult to obtain, a three-coordinate instrument is generally adopted in engineering to detect the characteristic point coordinates of the throat of the vane to reflect the actual throat area deviation amount, but the accuracy of the deviation amount directly depends on a detection method, and due to certain deviation of the actually processed vane, for example, the vane is lengthened/shortened, the shape of a trailing edge is elliptical or other shapes, the position and the area size of the actual throat window deviate from a design state, and the existing detection method cannot always accurately reflect the deviation amount. In addition, the throat area of the blade can be obtained by adopting a method for scanning and detecting the profile of the blade, but a large number of blades often result in long detection time and high cost.
Disclosure of Invention
The invention aims to overcome the defects that the detection method in the prior art cannot accurately reflect the deviation amount, the detection time is long and the cost is high, and provides a method for detecting the throat area of a turbine guide vane.
The invention solves the technical problems by the following technical scheme:
a turbine guide vane throat area detection method, the turbine guide vane throat area detection method comprising:
s1, selecting a plurality of detection sections on the radial height of a throat area window of a turbine guide;
s2, determining a throat detection point on the detection section;
s3, setting a throat height detection point on a throat area window of the turbine guider;
s4, measuring the throat area of the turbine guide in a state that the turbine guide is assembled into a whole ring.
In the scheme, by adopting the throat area detection method, the deviation of the actual throat area and the design state can be detected rapidly, and meanwhile, the position of the throat characteristic point can be adjusted in real time according to the actual blade size and the tail edge shape, so that the accuracy of detecting the throat position and the area size can be improved. Therefore, the method provided by the patent can reduce the detection cost and is convenient for engineering application.
Preferably, in said S1, a number of said detection sections are uniformly distributed in the radial direction and cover the entire radial height.
Preferably, in S1, the number of detection sections is not less than three.
In the scheme, by adopting any method, the detection precision can be ensured, and the error can be reduced.
Preferably, the throat detection points include a trailing edge detection point Tk, a leaf basin detection point Pk, and a leaf back detection point Sk.
In the scheme, the deviation of the actual throat area and the design state can be rapidly detected by using a small number of characteristic point coordinates, and the detection efficiency is improved.
Preferably, the S2 specifically is: establishing a coordinate system (X, Y), rotating the coordinate system (X, Y) by an angle theta to form a measurement coordinate system (X ', Y '), and determining the throat detection point on the detection section along the direction of a coordinate axis Y '.
Preferably, the turbine guide throat area window comprises a first blade, a second blade, an inner rim plate, an outer rim plate and a trailing edge, the first blade and the second blade forming a throat width, the inner rim plate and the outer rim plate forming the radial height.
Preferably, the S2 specifically is: and determining the tail edge detection point Tk on the second blade along the Y 'direction of the coordinate axis, wherein the tail edge detection point Tk is positioned at the tail end of the endpoint, the tail edge detection point Tk can be determined by scanning the tail edge to obtain the maximum value along the Y' direction of the coordinate axis, and moving a distance s along the Y 'direction of the coordinate axis to determine the leaf basin detection point Pk, and the distance s is the distance between the tail edge detection point Tk and the leaf basin detection point Pk along Y'.
In the scheme, by adopting the method, the leaf basin detection point Pk and the tail edge detection point Tk can be rapidly determined.
Preferably, the cone detection point Pk and the back detection point Sk are coordinate points on two sides of a throat window formed between the first blade and the second blade, and a distance between the cone detection point Pk and the back detection point Sk is a minimum distance between the first blade and the second blade.
Preferably, the throat height detection point comprises:
a first height detection point Htip located on the outer edge plate;
a second height detection point Hhub located at the inner edge plate;
the second height detection point Hhub is the projection of the midpoint of the lowest detection section on the inner edge plate along the Z coordinate axis in the opposite direction, and the first height detection point Htip is the projection of the midpoint of the highest detection section on the outer edge plate along the Z coordinate axis.
In the scheme, by adopting the method, the first height detection point Htip and the second height detection point Hhub can be rapidly determined.
Preferably, in S4, specifically: and measuring the throat area of the turbine guide by a three-coordinate instrument in a state that the turbine guide is assembled into a whole ring through the obtained theoretical coordinate values of the tail edge detection points Tk, the leaf basin detection points Pk and the leaf back detection points Sk of a plurality of detection sections and the distances s between the tail edge detection points Tk and the leaf basin detection points Pk of the sections.
The invention has the positive progress effects that: according to the method for detecting the throat area of the turbine guide vane, disclosed by the invention, the deviation of the actual throat area and the design state can be rapidly detected by utilizing a small number of characteristic point coordinates, and meanwhile, the position of the throat characteristic point can be adjusted in real time according to the actual vane size and the tail edge shape, so that the accuracy of detecting the throat position and the area size can be improved. Therefore, the method provided by the patent can reduce the detection cost and is convenient for engineering application.
Drawings
FIG. 1 is a schematic view of a turbine pilot assembly according to a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of detecting coordinate points of a throat area window according to a preferred embodiment of the present invention.
FIG. 3 is a schematic view of a cross-sectional blade detection coordinate point in accordance with a preferred embodiment of the present invention.
FIG. 4 is a schematic view of a cross-sectional blade trailing edge termination point according to a preferred embodiment of the invention.
FIG. 5 is a flow chart of a method for detecting throat area of a turbine guide vane in accordance with a preferred embodiment of the present invention.
Reference numerals illustrate:
first blade 1
Second blade 2
Inner edge plate 3
Outer edge plate 4
Trailing edge 5
Turbine pilot throat area window 6
Detailed Description
The invention is further illustrated by means of examples which follow, without thereby restricting the scope of the invention thereto.
As shown in fig. 1, the turbine guide throat area window 6 includes a first vane 1, a second vane 2, an inner rim plate 3, an outer rim plate 4, and a trailing edge 5, the first vane 1 and the second vane 2 forming a throat width, the inner rim plate 3 and the outer rim plate 4 forming a radial height.
As shown in fig. 1 to 5, the present embodiment discloses a method for detecting the throat area of a turbine guide vane, which includes:
s1, selecting K detection sections on the radial height of a throat area window 6 of the turbine guide. The detection sections are uniformly distributed or regularly arranged in the radial direction and cover the entire radial height. The K value can be determined according to the distortion condition of the aperture of the blade, the K value is not lower than three, and the greater the distortion of the blade is, the greater the K value is, so that the detection precision is ensured, and the error is reduced.
S2, determining a throat detection point on the detection section. The throat detection points comprise a tail edge detection point Tk, a leaf basin detection point Pk and a leaf back detection point Sk. S2 specifically comprises the following steps: on a theoretical blade model, a coordinate system (X, Y) is established, the coordinate system (X, Y) is rotated by an angle theta to form a measurement coordinate system (X ', Y'), a tail edge detection point Tk on the second blade 2 is determined along the direction of the coordinate axis Y ', the tail edge detection point Tk is positioned at the tail end of an endpoint, the tail edge detection point Tk can be determined by scanning the tail edge 5 to obtain the maximum value along the direction of the coordinate axis Y', the tail edge detection point Tk moves a distance s along the opposite direction of the coordinate axis Y ', and the distance s is the distance between the tail edge detection point Tk and the leaf basin detection point Pk along Y'. By adopting the method, the detection point Pk of the leaf basin and the detection point Tk of the tail edge can be rapidly determined.
The cone detection point Pk and the back detection point Sk are coordinate points on both sides of the throat window formed between the first blade 1 and the second blade 2, and the distance between the cone detection point Pk and the back detection point Sk is the minimum distance between the first blade 1 and the second blade 2, and thus are unique coordinate points on the theoretical model.
S3, setting a throat height detection point on the throat area window 6 of the turbine guider. The throat height detection points comprise a first height detection point Htip and a second height detection point Hhub, wherein the first height detection point Htip is positioned on the outer edge plate 4, and the second height detection point Hhub is positioned on the inner edge plate 3. The second height detection point Hhub takes the projection of the midpoint of the P1S1 on the inner edge plate 3 along the Z coordinate axis in the opposite direction, and the first height detection point Htip takes the projection of the midpoint of the PkSk on the outer edge plate 4 along the Z coordinate axis, so that the first height detection point Htip and the second height detection point Hhub can be rapidly determined.
S4, measuring the throat area of the turbine guide in a state that the turbine guide is assembled into a whole ring. Specifically, the throat area of the turbine guide is measured by a three-coordinate instrument in a state that the turbine guide is assembled into a whole ring through the obtained theoretical coordinate values of the tail edge detection points Tk, the blade basin detection points Pk and the blade back detection points Sk of a plurality of detection sections and the distance s between the tail edge detection points Tk and the blade basin detection points Pk of each detection section. As shown in fig. 2, the Y coordinates of the theoretical coordinate points Tk of the k radial sections are adopted, the X coordinates of the actual Tk are measured on the turbine guide, and the X coordinates of the detection points Pk of the blade basin under the measurement coordinate system (X ', Y') 0 are obtained according to the distance s based on the X coordinates of Tk, so as to avoid the shape deviation caused by the actual machining of the blade trailing edge 5.
As shown in fig. 4, in the measurement coordinate system (X ', Y'), the actual Y coordinate of the object guide window leaf basin detection point Pk is measured according to the X coordinate of the leaf basin detection point Pk, the actual Y coordinate of the object guide window leaf back detection point Sk is measured according to the X coordinate of the leaf back detection point Sk, and the difference between the Y coordinates of the leaf basin detection point Pk and the leaf back detection point Sk is the throat width of the measurement section of the actual guide.
Under the measurement coordinate system (X, Y), taking the X and Y theoretical coordinate values of the midpoint of the PkSk according to the first height detection point Htip, measuring to obtain the actual z coordinate value of the first height detection point Htip, taking the X and Y theoretical coordinate values of the midpoint of the P1S1 according to the second height detection point Hhub, and measuring to obtain the actual z coordinate value of the second height detection point Hhub.
The throat area between the radial detection sections is calculated according to a rectangular area formula, and the areas of k+1 throat windows are accumulated along the radial direction to obtain the actual detection value of the throat area of the turbine guide
And calculating the theoretical value of the throat area of the turbine guide of the theoretical model according to the coordinate points obtained on the theoretical model by adopting the same calculation method, so as to calculate the deviation between the actual throat area and the theoretical throat area.
According to the throat area detection method, the deviation of the actual throat area and the design state can be detected rapidly, meanwhile, the position of the throat characteristic point is adjusted in real time according to the actual blade size and the tail edge shape, and the accuracy of detecting the throat position and the throat area can be improved. Therefore, the method provided by the patent can reduce the detection cost and is convenient for engineering application.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (10)
1. The method for detecting the throat area of the turbine guide vane is characterized by comprising the following steps of:
s1, selecting a plurality of detection sections on the radial height of a throat area window of a turbine guide;
s2, determining a throat detection point on the detection section;
s3, setting a throat height detection point on a throat area window of the turbine guider;
s4, measuring the throat area of the turbine guide in a state that the turbine guide is assembled into a whole ring.
2. The method for detecting the throat area of a turbine guide vane according to claim 1, wherein in said S1, a plurality of said detection sections are uniformly distributed in a radial direction and cover the entire radial height.
3. The method for detecting a throat area of a turbine guide vane according to claim 1, wherein in said S1, the number of said detection sections is not less than three.
4. The method for detecting the throat area of a seed turbine guide vane according to claim 1, wherein the throat detection points include a trailing edge detection point Tk, a cone detection point Pk and a back detection point Sk.
5. The method for detecting the throat area of the turbine guide vane according to claim 4, wherein the step S2 is specifically as follows: establishing a coordinate system (X, Y), rotating the coordinate system (X, Y) by an angle theta to form a measurement coordinate system (X ', Y '), and determining the throat detection point on the detection section along the direction of a coordinate axis Y '.
6. The turbine guide vane throat area detection method of claim 5, wherein the turbine guide vane throat area window comprises a first vane, a second vane, an inner rim plate, an outer rim plate, and a trailing edge, the first vane and the second vane forming a throat width, the inner rim plate and the outer rim plate forming the radial height.
7. The method for detecting the throat area of the stator blade of the turbine according to claim 6, wherein the step S2 is specifically as follows: and determining the tail edge detection point Tk on the second blade along the Y 'direction of the coordinate axis, wherein the tail edge detection point Tk is positioned at the tail end of the endpoint, the tail edge detection point Tk can be determined by scanning the tail edge to obtain the maximum value along the Y' direction of the coordinate axis, and moving a distance s along the Y 'direction of the coordinate axis to determine the leaf basin detection point Pk, and the distance s is the distance between the tail edge detection point Tk and the leaf basin detection point Pk along Y'.
8. The turbine guide vane throat area detection method according to claim 6, wherein the cone detection point Pk and the back detection point Sk are coordinate points on both sides of a throat window formed between the first vane and the second vane, and a distance between the cone detection point Pk and the back detection point Sk is a minimum distance between the first vane and the second vane.
9. The method for detecting throat area of a turbine guide vane according to claim 6, wherein the throat height detection point comprises:
a first height detection point Htip located on the outer edge plate;
a second height detection point Hhub located at the inner edge plate;
the second height detection point Hhub is the projection of the midpoint of the lowest detection section on the inner edge plate along the Z coordinate axis in the opposite direction, and the first height detection point Htip is the projection of the midpoint of the highest detection section on the outer edge plate along the Z coordinate axis.
10. The method for detecting the throat area of a turbine guide vane according to claim 7, wherein at S4, specifically: and measuring the throat area of the turbine guide by a three-coordinate instrument in a state that the turbine guide is assembled into a whole ring through the obtained theoretical coordinate values of the tail edge detection points Tk, the leaf basin detection points Pk and the leaf back detection points Sk of a plurality of detection sections and the distances s between the tail edge detection points Tk and the leaf basin detection points Pk of the detection sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210666844.4A CN117268315A (en) | 2022-06-13 | 2022-06-13 | Method for detecting throat area of turbine guide vane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210666844.4A CN117268315A (en) | 2022-06-13 | 2022-06-13 | Method for detecting throat area of turbine guide vane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117268315A true CN117268315A (en) | 2023-12-22 |
Family
ID=89203212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210666844.4A Pending CN117268315A (en) | 2022-06-13 | 2022-06-13 | Method for detecting throat area of turbine guide vane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117268315A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118211429A (en) * | 2024-05-20 | 2024-06-18 | 中国航发沈阳发动机研究所 | Turbine guide flow capacity matching method based on complete machine performance optimization |
-
2022
- 2022-06-13 CN CN202210666844.4A patent/CN117268315A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118211429A (en) * | 2024-05-20 | 2024-06-18 | 中国航发沈阳发动机研究所 | Turbine guide flow capacity matching method based on complete machine performance optimization |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105333855B (en) | A method of it measures, calculate turborotor and throat area of guider | |
| EP1760427B1 (en) | Methods for measuring the nozzle flow area between gas turbine engine vanes | |
| US7990547B2 (en) | Apparatus and a method of measuring erosion of an edge of a turbomachine aerofoil | |
| EP1518090B1 (en) | Optical measurement of vane ring throat area | |
| CN105627923A (en) | Scan path programming method obtained by leaf dense point cloud on basis of laser ranging | |
| CN103245291B (en) | Blade parts assembly accuracy detection method | |
| CN106940177A (en) | A kind of turborotor half window throat area measuring method | |
| CN112507489A (en) | Turbine guide blade and guide device throat area calculation method | |
| CN113639700B (en) | Three-coordinate measuring method for throat area of turbine guide | |
| CN109141302B (en) | Impeller detection method based on least square method | |
| CN117268315A (en) | Method for detecting throat area of turbine guide vane | |
| US12005666B2 (en) | Method for calculating the thickness of the trailing and leading edges on a blade profile | |
| CN113607119B (en) | Marine gas turbine blade throat area measurement method based on characteristic dimension | |
| CN113155959B (en) | Arc fir-type blade root image identification method based on phased array detection | |
| EP2026031A1 (en) | Semi-automatic reverse engineering rotor disk inspection | |
| CN106123725B (en) | Correct the reverse implementation method of the compressor blade of various dimensions mismachining tolerance | |
| CN114720145A (en) | Low-pressure turbine performance test method with rectifying blades | |
| CN112485334A (en) | Method for distinguishing shapes of phased array ultrasonic detection parts of blade roots and blade roots in real time | |
| CN114459391A (en) | Method and device for detecting throat area of turbine guider | |
| CN116164695B (en) | Turbine guide and exhaust area measurement method thereof | |
| CN113701665B (en) | Digital scanning measurement method for exhaust area of guide vane | |
| CN116336996B (en) | Method for detecting deflection of low-pressure turbine blade by using three-coordinate measuring machine | |
| CN118551502A (en) | Method and system for analyzing blade profile position of blisk blade | |
| CN107726974A (en) | Complex-curved blade iterative scans measuring method based on distance measuring sensor | |
| CN114310738B (en) | Positioning tool for three-way flow blade and application method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |