Section area detection piece

Abstract

The utility model belongs to the technical field of turbine guider manufacturing, and discloses a sectional area detection piece. The go-no-go gauge comprises an inner go-no-go gauge and an outer go-no-go gauge, a first inner ball head and a second inner ball head are installed at the two ends of the inner go-no-go gauge, the first inner ball head is larger than the second inner ball head, the first inner ball head and the second inner ball head are inserted between blades of the turbine guider, and the first inner ball head and the second inner ball head abut against an inner installation ring of the turbine guider; a first outer ball head and a second outer ball head are installed at the two ends of the outer go-no go gauge, the first outer ball head is larger than the second outer ball head, the first outer ball head and the second outer ball head are inserted between blades of the turbine guider, and the first outer ball head and the second outer ball head abut against an outer installation ring of the turbine guider; the problems that in the prior art, an unqualified turbine guider is put into an experiment, and the experiment efficiency is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine guide vane manufacturing, in particular to a cross-sectional area detection piece. Background Art

[0002] The exhaust area of a turbine guide vane is one of the key parameters of the performance of an aero-engine and a gas turbine, which directly affects the temperature and flow field before and after the turbine stage, as well as the flow rate, thrust, rotational speed and fuel consumption rate of the engine. The turbine guide vane is composed of an inner installation ring, an outer installation ring and guide vanes on the inner side. The exhaust area refers to the cross-sectional area of the exhaust flow channel formed between adjacent vanes. After the turbine guide vane is manufactured, if the cross-sectional area of the exhaust flow channel exceeds or is lower than the preset value, the cross-sectional area of the exhaust flow channels of some turbine guide vanes will deviate from the expected range. When the unqualified turbine guide vanes are put into the experiment, the temperature and flow field before and after the turbine stage, as well as the flow rate, thrust, rotational speed and fuel consumption rate of the engine, etc. cannot meet the expected requirements, reducing the experimental efficiency.

[0003] The existing method is to record the time required for water to pass through the turbine guide vane by using a flowmeter and determine the cross-sectional area of the exhaust flow channel of the measured turbine guide vane in combination with the data of the standard turbine guide vane. Or use a digital inductance sensor to collect data, and automatically calculate, analyze and output through a measuring device. There is also a method based on the non-contact optical measurement principle. According to the measured three-dimensional point cloud coordinates, the three-dimensional contour of each exhaust flow channel is fitted, and the cross-sectional area of each exhaust flow channel and the total exhaust area are calculated. However, the above methods have high operation difficulty and technical thresholds. At the same time, it takes a long time to detect the cross-sectional area of the exhaust flow channel of a single turbine guide vane, which is not suitable for the detection after mass production and cannot keep up with the production rhythm. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cross-sectional area detection piece to solve the problem that unqualified turbine guide vanes will be put into the experiment in the prior art, reducing the experimental efficiency.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: The utility model provides a cross-sectional area detection piece, including an internal through gauge and an external through gauge. The two ends of the internal through gauge are installed with a first internal ball head and a second internal ball head. The first internal ball head is larger than the second internal ball head. The first internal ball head and the second internal ball head are spherical. The first internal ball head and the second internal ball head are inserted between the vanes of the turbine guide vane, and the first internal ball head and the second internal ball head are abutted against the inner installation ring of the turbine guide vane.

[0006] At both ends of the external through gauge, a first external ball head and a second external ball head are installed. The first external ball head is larger than the second external ball head. The first external ball head and the second external ball head are spherical. The first external ball head and the second external ball head are inserted between the blades of the turbine guide vane, and the first external ball head and the second external ball head are in contact with the outer mounting ring of the turbine guide vane.

[0007] Preferably, the internal through gauge includes an internal handle. At both ends of the internal handle, a first internal rod and a second internal rod are inserted. The first internal ball head is installed on the first internal rod, and the second internal ball head is installed on the second internal rod.

[0008] Preferably, the first internal rod and the second internal rod are bent, and the first internal rod and the second internal rod can be bent.

[0009] Preferably, words are etched on the internal handle.

[0010] Preferably, the external through gauge includes an external handle. At both ends of the external handle, a first external rod and a second external rod are inserted. The first external ball head is installed on the first external rod, and the second external ball head is installed on the second external rod.

[0011] Preferably, the first external rod and the second external rod are bent, and the first external rod and the second external rod can be bent.

[0012] Preferably, words are etched on the external handle.

[0013] Beneficial effects: The internal through gauge detects the blade clearance on one side of the internal mounting ring, and the external through gauge detects the blade clearance on one side of the external mounting ring. By alternately inserting the internal through gauge and the external through gauge, it is determined whether the clearance between the blades meets the design requirements, quickly screening out qualified turbine guide vanes. The manufacturing costs of the internal through gauge and the external through gauge are relatively low, which can reduce the experimental costs. At the same time, by inserting the first internal ball head, the second internal ball head, the first external ball head, and the second external ball head at most four times, it is determined whether the spacing between the turbine guide vane blades is qualified, improving the screening efficiency and also reducing the detection difficulty. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the detection of the internal through gauge and the external through gauge of the present invention;

[0015] Figure 2 is a cross-sectional view of the detection of the internal through gauge and the external through gauge of the present invention;

[0016] Figure 3 is a main view of the eddy current guide vane of the present invention;

[0017] Figure 4It is the main view of the internal go-no-go gauge of the present utility model;

[0018] Figure 5 It is the main view of the external go-no-go gauge of the present utility model.

[0019] In the figure: 1. Internal go-no-go gauge; 11. First internal ball head; 12. Second internal ball head; 13. Internal handle; 14. First internal rod; 15. Second internal rod; 2. External go-no-go gauge; 21. First external ball head; 22. Second external ball head; 23. External handle; 24. First external rod; 25. Second external rod; 3. Turbine guide; 31. Internal mounting ring; 32. External mounting ring; 33. Blade; 331. Blade back; 332. Blade basin; 34. Exhaust flow channel. Specific embodiments

[0020] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0021] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature is at a lower horizontal height than the second feature.

[0023] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] The turbine guide vane is annular. There is an inner mounting ring on the inner side and an outer mounting ring on the outer side. Arc-shaped vanes are installed between the inner mounting ring and the outer mounting ring. The vane itself is curved. A convex back is formed on one side of the vane, and a concave basin is formed on the other side. The vanes are installed in a radial and radiating form in the gap between the inner mounting ring and the outer mounting ring. The back of one set of vanes and the basin of the adjacent vanes enclose an arc-shaped exhaust passage. The cross-sectional area of the exhaust passage is a key factor affecting the engine performance parameters. During the design of the vortex guide vane, the cross-sectional area of the processed exhaust passage needs to be between the maximum value and the minimum value for this turbine guide vane to be a qualified part.

[0025] In the prior art, based on the non-contact optical measurement principle, fitting the three-dimensional contour of each exhaust passage according to the measured three-dimensional point cloud coordinates, calculating the exhaust area of each exhaust passage and the total exhaust area, and finally calculating the cross-sectional area of the exhaust passage of the actual turbine guide vane is time-consuming. If a large number of turbine guide vanes need to be detected, it cannot keep up with the production rhythm, reducing the production efficiency. Moreover, this inspection method is relatively complex and has a high difficulty.

[0026] To solve the above problems, as Figures 1 to 5As shown in the figure, the present utility model provides a cross-sectional area detection member. The back 331 of the blade 33, the basin 332 of the adjacent blade 33, the inner mounting ring 31 and the outer mounting ring 32 enclose an arc-shaped exhaust passage 34. Along the axial projection of the eddy current guide, there is a certain angle between the blades 33 on both sides of each exhaust passage 34. At the same time, the two sides enclosed by the inner mounting ring 31 and the outer mounting ring 32 on both sides of the exhaust passage 34 can be regarded as two sides that are approximately parallel and close to a straight line. Then, the exhaust passage 34 projected along the axial direction of the eddy current guide is approximately an isosceles trapezoid. From the trapezoid area calculation formula, it can be deduced that the trapezoid area is positively correlated with the lengths of the parallel sides on the upper and lower sides. Since the distance between the inner mounting ring 31 and the outer mounting ring 32 has been determined in advance, if it is necessary to detect the area of the exhaust passage 34, only the distance between the adjacent blades 33 near the inner mounting ring 31 and the distance between the adjacent blades 33 near the outer mounting ring 32 need to be detected, and the lengths of the parallel sides on the upper and lower sides in the trapezoid area are obtained, then the area of the exhaust passage 34 can be directly estimated. Since the direction of the exhaust passage 34 is arc-shaped, by sliding a sphere along the exhaust passage 34, since the diameter of the sphere is known and the sphere is close to contacting the blades 33 on both sides, all the distances between two groups of adjacent blades 33 along the flow direction of the exhaust passage 34 can be detected in real time, and then the cross-sectional areas at all height positions along the flow direction of the exhaust passage 34 can be estimated.

[0027] Since the maximum and minimum values of the cross-sectional area of the exhaust passage 34 need to be determined at the initial design stage, and the distance between the inner mounting ring 31 and the outer mounting ring 32 has been determined in advance, the maximum and minimum values of the distance between the adjacent blades 33 at the outer mounting ring 32 and the maximum and minimum values of the distance between the adjacent blades 33 at the inner mounting ring 31 can be calculated. Finally, four groups of spherical bodies are made with the above maximum and minimum values and detected in the form of a go-no-go gauge. The first inner ball head 11, the second inner ball head 12, the first outer ball head 21 and the second outer ball head 22 are the above four groups of spherical bodies.

[0028] Since there are a total of four groups of maximum and minimum values at the outer mounting ring 32 and the inner mounting ring 31, the present utility model's cross-sectional area detection member provides an inner go-no-go gauge 1 and an outer go-no-go gauge 2.

[0029] The first inner ball head 11 and the second inner ball head 12 are installed at both ends of the inner go-no-go gauge 1. The first inner ball head 11 is larger than the second inner ball head 12. The first inner ball head 11 and the second inner ball head 12 are spherical. The first inner ball head 11 and the second inner ball head 12 are inserted between the blades 33 of the turbine guide 3, and the first inner ball head 11 and the second inner ball head 12 are in contact with the inner mounting ring 31 of the turbine guide 3;

[0030] The diameter of the first inner ball head 11 is the maximum value of the distance between the blades 33 at the inner mounting ring 31, and the diameter of the second inner ball head 12 is the minimum value of the distance between the blades 33 at the inner mounting ring 31.

[0031] At both ends of the external through gauge 2, a first external ball head 21 and a second external ball head 22 are installed. The first external ball head 21 is larger than the second external ball head 22. The first external ball head 21 and the second external ball head 22 are spherical. The first external ball head 21 and the second external ball head 22 are inserted between the blades 33 of the turbine guide vane 3, and the first external ball head 21 and the second external ball head 22 are in contact with the outer mounting ring 32 of the turbine guide vane 3.

[0032] The diameter of the first external ball head 21 is the maximum value of the distance between the blades 33 at the outer mounting ring 32, and the diameter of the second external ball head 22 is the minimum value of the distance between the blades 33 at the outer mounting ring 32.

[0033] The internal through gauge 1 includes an internal handle 13. At both ends of the internal handle 13, a first internal rod 14 and a second internal rod 15 are inserted. A first internal ball head 11 is installed on the first internal rod 14, and a second internal ball head 12 is installed on the second internal rod 15.

[0034] According to the design requirements of the cross-sectional area of the exhaust gas flow channel 34 of different turbine guide vanes 3, by inserting and pulling out the first internal rod 14 and the second internal rod 15, different diameters of the first internal ball head 11 and the second internal ball head 12 can be replaced, so that the cross-sectional area detection piece of the present utility model can be adapted to a wider range.

[0035] During the detection process, the first internal ball head 11 and the second internal ball head 12 need to be inserted along the arc-shaped exhaust gas flow channel 34, and mainly keep the first internal ball head 11 and the second internal ball head 12 in contact with the outer wall of the inner mounting ring 31. The first internal rod 14 and the second internal rod 15 are bent. The first internal rod 14 and the second internal rod 15 can be bent so that the bent shape of the first internal rod 14 and the second internal rod 15 can adapt to the trend of the exhaust gas flow channel 34. The first internal ball head 11 and the second internal ball head 12 can reach all positions that need to be detected along the exhaust gas flow channel 34. Under the condition that the size permits, a through-type detection can be carried out, reducing the misdetection rate. By slightly bending the first internal rod 14 and the second internal rod 15 to adapt to different trends of the exhaust gas flow channel 34, the adaptation ability is stronger and the detection range is wider.

[0036] The external through gauge 2 includes an external handle 23. At both ends of the external handle 23, a first external rod 24 and a second external rod 25 are inserted. A first external ball head 21 is installed on the first external rod 24, and a second external ball head 22 is installed on the second external rod 25.

[0037] According to the design requirements of the cross-sectional area of the exhaust gas flow channel 34 of different turbine guide vanes 3, by inserting and pulling out the first external rod 24 and the second external rod 25, different diameters of the first external ball head 21 and the second external ball head 22 can be replaced, so that the cross-sectional area detection piece of the present utility model can be adapted to a wider range.

[0038] During the detection process, the first outer ball head 21 and the second outer ball head 22 need to be inserted along the arc-shaped exhaust passage 34 and always abutted against the outer mounting ring 32. The first outer rod 24 and the second outer rod 25 are bent, and the first outer rod 24 and the second outer rod 25 can be bent, so that the bent shape of the first outer rod 24 and the second outer rod 25 can adapt to the trend of the exhaust passage 34. The first outer ball head 21 and the second outer ball head 22 can reach all the positions to be detected along the exhaust passage 34, and can complete the through detection within the allowable size, reducing the misdetection rate. By slightly bending the first outer rod 24 and the second outer rod 25 to adapt to different trends of the exhaust passage 34, the adaptation ability is stronger and the detection range is wider.

[0039] Words are etched on both the inner grip 13 and the outer grip 23, which is convenient for the inspectors to distinguish the internal go-no-go gauge 1 and the external go-no-go gauge 2, facilitating subsequent detection and reducing the usage error rate.

[0040] A working method for a cross-sectional area detection piece includes the following steps:

[0041] S1. Insert the first inner ball head 11 between the blades 33 of the turbine guide vane 3, make the first inner ball head 11 abut against the inner mounting ring 31, and push the first inner ball head 11 downward. If the first inner ball head 11 cannot pass through the gap between the blades 33, go to step S2; if the first inner ball head 11 passes through the gap between the blades 33, the turbine guide vane 3 is unqualified.

[0042] S2. Insert the second inner ball head 12 between the blades 33 of the turbine guide vane 3, make the second inner ball head 12 abut against the inner mounting ring 31, and push the second inner ball head 12 downward. If the second inner ball head 12 passes through the gap between the blades 33, go to step S3; if the second inner ball head 12 cannot pass through the gap between the blades 33, the turbine guide vane 3 is unqualified.

[0043] S3. Insert the first outer ball head 21 between the blades 33 of the turbine guide vane 3, make the first outer ball head 21 abut against the inner wall of the outer mounting ring 32, and push the first outer ball head 21 downward. If the first outer ball head 21 cannot pass through the gap between the blades 33, go to step S4; if the first outer ball head 21 passes through the gap between the blades 33, the turbine guide vane 3 is unqualified.

[0044] S4. Insert the first inner ball head 11 between the blades 33 of the turbine guide vane 3, make the first inner ball head 11 abut against the inner wall of the outer mounting ring 32, and push the first inner ball head 11 downward. If the first inner ball head 11 can pass through the gap between the blades 33, the cross-sectional area between one group of blades 33 in the turbine guide vane 3 is qualified; if the first inner ball head 11 cannot pass through the gap between the blades 33, the turbine guide vane 3 is unqualified.

[0045] In step S1, if the first inner ball head 11 can penetrate the exhaust passage 34 along the outer wall of the inner mounting ring 31, it means that the spacing between the blades 33 at this inner mounting ring 31 is relatively large, and the turbine guide 3 cannot be used continuously; if the first inner ball head 11 cannot penetrate the exhaust passage 34 along the outer wall of the inner mounting ring 31, it means that the spacing between the blades 33 at this inner mounting ring 31 is lower than the maximum value at the beginning of the design, meeting the design requirements, and continue with the subsequent tests.

[0046] In step S2, if the second inner ball head 12 cannot penetrate the exhaust passage 34 along the outer wall of the inner mounting ring 31, it means that the spacing between the blades 33 at this inner mounting ring 31 is too small, and the turbine guide 3 cannot be used continuously; if the second inner ball head 12 can penetrate the exhaust passage 34 along the outer wall of the inner mounting ring 31, it means that the spacing between the blades 33 at this inner mounting ring 31 is greater than the minimum value at the beginning of the design, meeting the design requirements, and continue with the subsequent tests.

[0047] In step S3, if the first outer ball head 21 can penetrate the exhaust passage 34 along the inner wall of the outer mounting ring 32, it means that the spacing between the blades 33 at this outer mounting ring 32 is relatively large, and the turbine guide 3 cannot be used continuously; if the first outer ball head 21 cannot penetrate the exhaust passage 34 along the inner wall of the outer mounting ring 32, it means that the spacing between the blades 33 at this outer mounting ring 32 is lower than the maximum value at the beginning of the design, meeting the design requirements, and continue with the subsequent tests.

[0048] In step S4, if the second outer ball head 22 cannot penetrate the exhaust passage 34 along the inner wall of the outer mounting ring 32, it means that the spacing between the blades 33 at this outer mounting ring 32 is too small, and the turbine guide 3 cannot be used continuously; if the second outer ball head 22 can penetrate the exhaust passage 34 along the inner wall of the outer mounting ring 32, it means that the spacing between the blades 33 at this outer mounting ring 32 is greater than the minimum value at the beginning of the design, meeting the design requirements, and continue with the subsequent tests.

[0049] After completing steps S1 to S4, it shows that the cross-sectional area of the flow passage between the blades 33 is between the maximum and minimum values expected in the early stage. After completing the detection of the cross-sectional area of the exhaust passage 34 between all the blades 33 in the turbine guide 3 according to the above steps, if all pass, it means that the cross-sectional area of the exhaust passage 34 of this turbine guide 3 is between the maximum and minimum values set in the early stage.

[0050] By inserting the inner go-no-go gauge 1 and the outer go-no-go gauge 2 at most four times in total, the detection of the cross-sectional area of the exhaust passage 34 between the blades 33 can be completed, and the unqualified products in the turbine guide 3 can be screened, so that the cross-sectional area of the exhaust passage 34 in the turbine guide 3 meets the expected range and is put into the subsequent tests, making the temperature, flow field before and after the turbine stage, as well as the flow rate, thrust, rotational speed and fuel consumption rate of the engine reach the expected requirements, and improving the experimental efficiency.

[0051] Determine whether the cross-sectional area of the exhaust passage 34 is between the maximum and minimum values set as expected. The detection step is of low difficulty and short detection time, which can improve the detection efficiency. At the same time, the production costs of the internal through gauge 1 and the external through gauge 2 are low, the detection means is relatively simple, the threshold is low, and it is easy to operate.

[0052] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A cross-sectional area detection component, characterized in that It includes an internal go-no-go gauge (1) and an external go-no-go gauge (2). The two ends of the internal go-no-go gauge (1) are installed with a first internal ball head (11) and a second internal ball head (12). The first internal ball head (11) is larger than the second internal ball head (12). The first internal ball head (11) and the second internal ball head (12) are spherical. The first internal ball head (11) and the second internal ball head (12) are inserted between the blades (33) of the turbine guide vane (3), and the first internal ball head (11) and the second internal ball head (12) are in contact with the internal mounting ring (31) of the turbine guide vane (3). The two ends of the external go-no-go gauge (2) are installed with a first external ball head (21) and a second external ball head (22). The first external ball head (21) is larger than the second external ball head (22). The first external ball head (21) and the second external ball head (22) are spherical. The first external ball head (21) and the second external ball head (22) are inserted between the blades (33) of the turbine guide vane (3), and the first external ball head (21) and the second external ball head (22) are in contact with the external mounting ring (32) of the turbine guide vane (3).

2. The cross-sectional area detecting member according to claim 1, wherein The internal go-no-go gauge (1) includes an internal handle (13). The two ends of the internal handle (13) are inserted with a first internal rod (14) and a second internal rod (15). The first internal ball head (11) is installed on the first internal rod (14), and the second internal ball head (12) is installed on the second internal rod (15).

3. The cross-sectional area detecting member according to claim 2, wherein The first internal rod (14) and the second internal rod (15) are bent, and the first internal rod (14) and the second internal rod (15) can be bent.

4. The cross-sectional area detecting member according to claim 2, wherein Words are etched on the internal handle (13).

5. The cross-sectional area detection member according to claim 1, characterized in that The external go-no-go gauge (2) includes an external handle (23). The two ends of the external handle (23) are inserted with a first external rod (24) and a second external rod (25). The first external ball head (21) is installed on the first external rod (24), and the second external ball head (22) is installed on the second external rod (25).

6. The cross-sectional area detection member according to claim 5, wherein The first external rod (24) and the second external rod (25) are bent, and the first external rod (24) and the second external rod (25) can be bent.

7. The cross-sectional area detecting member according to claim 5, wherein Words are etched on the external handle (23).

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