A test piece and assembly method for rapid measurement of the flow area of a guide vane

Abstract

This application belongs to the technical field of the flow area measurement of an aeroengine turbine guide vane, and particularly relates to a test piece and an assembly method for quickly measuring the flow area of a guide vane, including a convergent fairing outer ring, a convergent fairing inner ring, an outlet outer ring, an outlet inner ring, a protective ring, and a guide vane; the convergent fairing outer ring and the convergent fairing inner ring are arranged corresponding to each other inside and outside, the convergent fairing outer ring is connected to the outer ring inlet of the guide vane, and the convergent fairing inner ring is connected to the inner ring inlet of the guide vane; by means of an inlet convergent fairing, an inlet contraction channel design, axial dimension limitation, secondary sealing, sealing pressure monitoring, reduction of the design of components, etc., it ensures a thin boundary layer and high uniformity of the flow field at the inlet of the guide vane, ensures high tightness of the test piece structure, ensures the structural consistency of the batch of guide vane test pieces, and ensures the quick replacement of the batch of guide vanes; finally, it ensures the quick and highly accurate measurement of multiple guide vanes in a batch.

Description

Technical Field

[0001] This application belongs to the technical field of the flow area measurement of the turbine guide vane of an aeroengine, and particularly relates to a test piece and an assembly method for quickly measuring the flow area of the guide vane. Background Art

[0002] The turbine guide vane is a key component of an aero-turbine engine. The size of its flow area is a key parameter for the matching of each component, which directly affects parameters such as the flow rate, thrust, surge margin, and exhaust gas temperature of the engine, and has an important impact on the performance and stability of the engine. During the mass production process of the engine model, it is necessary to quickly and accurately measure the consistency of the flow area of each guide vane to meet the mass production quality and timeliness. Based on this requirement, a special tester dedicated to quickly measuring the flow area of the guide vane has been developed. The typical structure of the turbine guide vane is as Figure 1 shown. To achieve the rapid assembly and accurate measurement of the guide vane and the special tester, the prerequisite is that the oncoming flow boundary layer is thin, the flow field is uniform, the sealing performance is good, and the replacement can be carried out quickly. Therefore, a test piece for quickly measuring the flow area of the guide vane needs to be newly designed for the special measurement tester and the guide vane structure, and an assembly method is given. Summary of the Invention

[0003] The purpose of this application is to provide a test piece and an assembly method for quickly measuring the flow area of the guide vane to solve the problems of low uniformity of the oncoming flow field of the guide vane and thick boundary layer.

[0004] The technical solution of this application is: A test piece for quickly measuring the flow area of the guide vane includes an outer ring of the converging and rectifying section, an inner ring of the converging and rectifying section, an outer ring at the outlet, an inner ring at the outlet, a protection ring, and a guide vane;

[0005] The outer ring of the converging and rectifying section and the inner ring of the converging and rectifying section are arranged corresponding to each other inside and outside. The outer ring of the converging and rectifying section is connected to the outer ring inlet of the guide vane, and the inner ring of the converging and rectifying section is connected to the inner ring inlet of the guide vane; The outer ring at the outlet is arranged outside the outlet of the guide vane and is simultaneously connected to the outer ring of the converging and rectifying section and the outer ring inlet of the guide vane. The inner ring at the outlet is arranged inside the outlet of the guide vane and is simultaneously connected to the inner ring of the converging and rectifying section and the inner ring inlet of the guide vane; The protection ring is correspondingly arranged at the outlet position of the guide vane. The inner side of the protection ring is connected to the inner ring at the outlet, and the outer side is connected to the outer ring at the outlet;

[0006] The outer ring of the converging and rectifying section, the inner ring of the converging and rectifying section, the outer ring at the outlet, the inner ring at the outlet, the protection ring, and the guide vane are all of revolution; The front end face of the outer ring of the converging and rectifying section is matched with the special tester; A conical rectifying and converging channel is formed between the outer ring of the converging and rectifying section and the inner ring of the converging and rectifying section.

[0007] Preferably, sealing grooves are provided between the guide vane and the outer ring of the convergent rectifying section and the inner ring of the convergent rectifying section, between the outer ring of the outlet and the outer ring of the convergent rectifying section and the guide vane, between the inner ring of the outlet and the inner ring of the convergent rectifying section and the guide vane, and between the protective ring and the inner ring of the outlet and the outer ring of the outlet. Flexible sealing rings are arranged in the sealing grooves for end face sealing.

[0008] Preferably, the flexible sealing ring is made of fluororubber.

[0009] Preferably, a sealing is provided between the outer side of the outer ring of the guide vane and the outer ring of the convergent rectifying section and the outer ring of the outlet to form an outer ring sealing cavity; a sealing is provided between the inner side of the inner ring of the guide vane and the inner ring of the convergent rectifying section and the inner ring of the outlet to form an inner ring sealing cavity.

[0010] Preferably, pressure measurement structures are arranged in both the outer ring sealing cavity and the inner ring sealing cavity; the pressure measurement structure includes a pressure lead pipe and a adapter; the inner end of the pressure lead pipe is inserted into the outer ring sealing cavity or the inner ring sealing cavity, and the outer end is connected to the adapter; the adapter can transmit signals to the outside.

[0011] Preferably, it further includes an installation rotating support section, which is a rotating body arranged around the axis of the guide vane, and the installation rotating support section is connected to the inner ring of the convergent rectifying section.

[0012] Preferably, the convergent curve of the outer ring of the convergent rectifying section corresponding to the inlet of the guide vane and the convergent curve of the inner ring of the convergent rectifying section corresponding to the inlet of the guide vane are both the Wietosinski curve or the bicubic curve.

[0013] Preferably, for the guide vane with non-axial air intake, a guide vane cascade section is arranged on the outer ring of the convergent rectifying section and the inner ring of the convergent rectifying section. The guide vane cascade section includes a guide vane cascade cylinder, a guide vane cascade outer ring, and a guide vane cascade inner ring, and the guide vane cascade cylinder is integrally connected to the guide vane cascade outer ring and the guide vane cascade inner ring.

[0014] As a specific implementation manner, a test piece assembly method for rapid measurement of the flow area of a guide vane includes:

[0015] Establish a three-dimensional space coordinate system, with the X direction in the space three-dimensional coordinate system facing upwards, and concentrically place the outer ring of the convergent rectifying section and the inner ring of the convergent rectifying section on an installation platform with the same horizontal reference;

[0016] Install the flexible sealing ring in the corresponding sealing grooves between the outer ring of the convergent rectifying section, the inner ring of the convergent rectifying section and the guide vane; install the guide vane on the outer ring of the convergent rectifying section and the inner ring of the convergent rectifying section;

[0017] Install flexible sealing rings between the outer ring of the outlet, the outer ring of the convergent rectifying section and the guide vane, and between the inner ring of the outlet, the inner ring of the convergent rectifying section and the guide vane, and fix the outer ring of the outlet and the inner ring of the outlet to the outer ring of the convergent rectifying section and the inner ring of the convergent rectifying section respectively.

[0018] Install the protection ring at the outlet of the guide vane.

[0019] Install the entire test piece on a special tester by installing a rotating support section, and complete the pressure measurement installation of the pressure measurement structure.

[0020] Preferably, for a test piece with a guide vane cascade section, install the guide vane cascade section between the outer ring of the convergent rectifying section, the inner ring of the convergent rectifying section and the guide vane.

[0021] The test piece and assembly method for rapid measurement of the flow area of the guide vane in this application ensure a thin boundary layer and high uniformity of the inlet flow field of the guide vane, ensure high tightness of the test piece structure, ensure the structural consistency of the batch of guide vane test pieces, and ensure the rapid replacement of the batch of guide vanes through means such as an inlet convergent rectifying section, an inlet contraction channel design, an axial dimension limit, a secondary seal, a seal pressure monitoring, and a reduction in the design of components. Finally, it ensures the rapid and highly accurate measurement of multiple guide vanes in batches. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions provided by this application, the drawings will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application.

[0023] Figure 1 It is the structural diagram of the turbine guide vane in the background technology;

[0024] Figure 2 It is the overall structural sectional view of this application;

[0025] Figure 3 It is the structural schematic diagram of the test piece with a guide vane cascade section of this application;

[0026] Figure 4 It is the structural schematic diagram of the outer ring of the convergent rectifying section and the inner ring of the convergent rectifying section of this application;

[0027] Figure 5 It is the structural schematic diagram of the outer ring of the outlet of this application;

[0028] Figure 6 It is the structural schematic diagram of the inner ring of the outlet of this application.

[0029] 1. Outer ring of the converging and rectifying section; 2. Inner ring of the converging and rectifying section; 21. Mounting and rotating support section; 3. Outer ring of the outlet; 4. Inner ring of the outlet; 5. Protection ring; 6. Guide vane; 61. Outer ring sealing cavity; 62. Inner ring sealing cavity; 7. Pressure measurement structure; 71. Pressure lead pipe; 72. Adapter; 8. Outer ring of the guide vane cascade; 9. Cylinder of the guide vane cascade; 10. Inner ring of the guide vane cascade; 11. Flexible sealing ring. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] A test piece for quickly measuring the flow area of a guide vane, as Figure 2 - Figure 3 shown, includes an outer ring 1 of the converging and rectifying section, an inner ring 2 of the converging and rectifying section, an outer ring 3 of the outlet, an inner ring 4 of the outlet, a protection ring 5, and a guide vane 6.

[0032] The outer ring 1 of the converging and rectifying section and the inner ring 2 of the converging and rectifying section are arranged corresponding to each other inside and outside. The outer ring 1 of the converging and rectifying section is connected to the outer ring inlet of the guide vane 6, and the inner ring 2 of the converging and rectifying section is connected to the inner ring inlet of the guide vane 6. The outer ring 3 of the outlet is arranged outside the outlet of the guide vane 6 and the outer ring 3 of the outlet is simultaneously connected to the outer ring 1 of the converging and rectifying section and the outer ring inlet of the guide vane 6. The inner ring 4 of the outlet is arranged inside the outlet of the guide vane 6 and the inner ring 4 of the outlet is simultaneously connected to the inner ring 2 of the converging and rectifying section and the inner ring inlet of the guide vane 6. The protection ring 5 is correspondingly arranged at the outlet position of the guide vane 6. The inner side of the protection ring 5 is connected to the inner ring 4 of the outlet, and the outer side is connected to the outer ring 3 of the outlet. The structures of the outer ring 3 of the outlet and the inner ring 4 of the outlet are as Figure 4 - Figure 5 shown.

[0033] The outer ring 1 of the converging and rectifying section, the inner ring 2 of the converging and rectifying section, the outer ring 3 of the outlet, the inner ring 4 of the outlet, the protection ring 5, and the guide vane 6 are all rotating bodies; the front end face of the outer ring 1 of the converging and rectifying section is matched with a special tester.

[0034] A conical rectifying and converging channel is formed between the outer ring 1 of the converging and rectifying section and the inner ring 2 of the converging and rectifying section to ensure that the inlet main flow area of the guide vane 6 is more than 80% of the entire flow area.

[0035] Preferably, sealing grooves are provided between the guide vane 6 and the outer ring 1 of the converging and rectifying section and the inner ring 2 of the converging and rectifying section, between the outer ring 3 of the outlet and the outer ring 1 of the converging and rectifying section and the guide vane 6, between the inner ring 4 of the outlet and the inner ring 2 of the converging and rectifying section and the guide vane 6, and between the protection ring 5 and the inner ring 4 of the outlet and the outer ring 3 of the outlet, and flexible sealing rings 11 are arranged in the sealing grooves for end face sealing to ensure the sealing performance.

[0036] Preferably, the flexible sealing ring 11 is made of fluororubber material.

[0037] Preferably, a sealing is provided between the outer side of the outer ring of the guide vane 6 and the outer ring 1 of the convergent fairing section and the outer ring 3 of the outlet, to form an outer ring sealing cavity 61; a sealing is provided between the inner side of the inner ring of the guide vane 6 and the inner ring 2 of the convergent fairing section and the inner ring 4 of the outlet, to form an inner ring sealing cavity 62, so as to achieve a secondary seal for the mainstream leakage.

[0038] Preferably, a pressure measurement structure 7 is provided in both the outer ring sealing cavity 61 and the inner ring sealing cavity 62. The pressure measurement structure 7 includes a pressure lead pipe 71 and a adapter 72. The inner end of the pressure lead pipe 71 is inserted into the outer ring sealing cavity 61 or the inner ring sealing cavity 62, and the outer end is connected to the adapter 72; the adapter 72 can transmit the signal to the outside to realize the acquisition of the pressure signal.

[0039] Preferably, the left end faces of the outer ring 1 of the convergent fairing section and the inner ring 2 of the convergent fairing section are in the same axial position to ensure the synchronization of the fluid flow on the inner and outer sides.

[0040] Preferably, the convergent curve of the outer ring 1 of the convergent fairing section corresponding to the inlet of the guide vane 6 and the convergent curve of the inner ring 2 of the convergent fairing section corresponding to the inlet of the guide vane 6 are both the Wietosinski curve or the bicubic curve. The convergent curve of the outer ring 1 of the convergent fairing section corresponding to the inlet of the guide vane 6 and the convergent curve of the inner ring 2 of the convergent fairing section corresponding to the inlet of the guide vane 6 are mirror-symmetrical curves to ensure the thin boundary layer and high uniformity of the incoming flow.

[0041] Preferably, the axial distance between the rectifying and converging channel and the leading edge of the mean diameter of the blades of the guide vane 6 is L1, and L1 ≤ 0.5 times the axial chord length C of the mean diameter of the blades of the guide vane 6, as Figure 2 .

[0042] For multiple guide vanes 6 produced in the same batch, the axial distance L2 between the trailing edge of the mean diameter of the blades of the guide vane 6 and the outlet end face of the test piece should be ensured to be consistent, as Figure 2 .

[0043] As Figure 6As shown, in a specific example, for the non-axial intake guide vane 6, a guide vane cascade section is provided on the outer ring 1 of the convergent fairing section and the inner ring 2 of the convergent fairing section. The guide vane cascade section includes a guide vane cascade cylinder 9, a guide vane cascade outer ring 8, and a guide vane cascade inner ring 10. The guide vane cascade cylinder 9 is integrally connected to the guide vane cascade outer ring 8 and the guide vane cascade inner ring 10. The guide vane cascade section is in sealing cooperation with the outer ring 1 of the convergent fairing section, the inner ring 2 of the convergent fairing section, and the guide vane 6 to form an outer ring sealing cavity 61 and an inner ring sealing cavity 62. The sealing cooperation mode of the guide vane cascade section with the outer ring 1 of the convergent fairing section, the inner ring 2 of the convergent fairing section, and the guide vane 6 is the same as the foregoing, and all use a flexible sealing ring 11 for sealing. By providing the guide vane cascade, the fluid entering the guide vane 6 is further rectified to improve the flow guiding stability.

[0044] Preferably, the flow guiding channel formed by the guide vane cascade outer ring 8 and the guide vane cascade inner ring 10 is a contraction type channel. The contraction angle α of the contraction type channel is 1° - 5°.

[0045] The axial distance L3 between the trailing edge of the mean diameter of the guide vane cascade and the leading edge of the mean diameter of the blades of the guide vane 6 should satisfy L3 ≤ 2 times the axial chord length C of the mean diameter of the blades of the guide vane 6.

[0046] Preferably, it further includes a mounting and rotating support section 21. The mounting and rotating support section 21 is a rotating body arranged to rotate around the axis of the guide vane 6. The mounting and rotating support section 21 is connected to the inner ring 2 of the convergent fairing section, and the test piece can be taken and the installation position can be rotated and adjusted by using a bench mounting tool.

[0047] As a specific implementation manner, it further includes a test piece assembly method for quickly measuring the flow area of the guide vane 6, including the following steps:

[0048] Step 1: Establish a three-dimensional space coordinate system, with the X direction in the space three-dimensional coordinate system facing upward, and concentrically place the outer ring 1 of the convergent fairing section and the inner ring 2 of the convergent fairing section on the same horizontal reference installation platform;

[0049] Preferably, for the test piece with a guide vane cascade section, install the guide vane cascade section between the outer ring 1 of the convergent fairing section, the inner ring 2 of the convergent fairing section, and the guide vane 6.

[0050] Step 2: Install the flexible sealing ring 11 in the corresponding sealing grooves between the outer ring 1 of the convergent fairing section, the inner ring 2 of the convergent fairing section, and the guide vane 6; install the guide vane 6 on the outer ring 1 of the convergent fairing section and the inner ring 2 of the convergent fairing section;

[0051] Step 3: Install the flexible sealing ring 11 between the outer ring 3 at the outlet and the outer ring 1 of the convergent fairing section and the guide vane 6, and between the inner ring 4 at the outlet and the inner ring 2 of the convergent fairing section and the guide vane 6, and install and fix the outer ring 3 at the outlet and the inner ring 4 at the outlet between the outer ring 1 of the convergent fairing section and the inner ring 2 of the convergent fairing section respectively;

[0052] Step 4: Install the protection ring 5 at the outlet of the guide 6;

[0053] Step 5: Install the entire test piece on the special tester by installing the rotating support section 21, and complete the installation of the pressure measurement structure 7 for pressure measurement.

[0054] In summary, through means such as the inlet convergent rectifying section, inlet contraction channel design, axial dimension limitation, secondary sealing, sealing pressure monitoring, and reduction of component design, the present application ensures a thin boundary layer and high uniformity of the inlet flow field of the guide, ensures high tightness of the test piece structure, ensures the structural consistency of the batch of guide test pieces, and ensures the rapid replacement of the batch of guides; ultimately, it ensures the rapid and highly accurate measurement of multiple guides in a batch.

[0055] Finally, it should be noted that: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0056] Finally: The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A test piece for rapid measurement of flow area of ​​a guide, characterized in that: It comprises a convergent and rectifying section outer ring (1), a convergent and rectifying section inner ring (2), an outlet outer ring (3), an outlet inner ring (4), a protection ring (5) and a guide (6); The outer ring (1) of the convergent straightening section and the inner ring (2) of the convergent straightening section are arranged correspondingly inside and outside, the outer ring (1) of the convergent straightening section is connected to the outer ring inlet of the guide (6), and the inner ring (2) of the convergent straightening section is connected to the inner ring inlet of the guide (6); the outlet outer ring (3) is arranged outside the outlet of the guide (6), and the outlet outer ring (3) is simultaneously connected to the outer ring (1) of the convergent straightening section and the outer ring inlet of the guide (6); the outlet inner ring (4) is arranged inside the outlet of the guide (6), and the outlet inner ring (4) is simultaneously connected to the inner ring (2) of the convergent straightening section and the inner ring inlet of the guide (6); the protection ring (5) is arranged correspondingly at the outlet position of the guide (6), and the inner side of the protection ring (5) is connected to the outlet inner ring (4), and the outer side is connected to the outlet outer ring (3); The convergent and straightening section outer ring (1), the convergent and straightening section inner ring (2), the outlet outer ring (3), the outlet inner ring (4), the protective ring (5) and the guide (6) are all rotating bodies; the front end surface of the convergent and straightening section outer ring (1) cooperates with a special tester; a conical straightening and convergent channel is formed between the convergent and straightening section outer ring (1) and the convergent and straightening section inner ring (2); The outer side of the outer ring of the guide (6) is sealed with the outer ring of the convergent and straightening section (1) and the outlet outer ring (3) to form an outer ring sealed cavity (61); the inner side of the inner ring of the guide (6) is sealed with the inner ring of the convergent and straightening section (2) and the outlet inner ring (4) to form an inner ring sealed cavity (62); A pressure measuring structure (7) is provided in both the outer ring sealing cavity (61) and the inner ring sealing cavity (62); the pressure measuring structure (7) comprises a pressure lead tube (71) and an adapter (72); the inner end of the pressure lead tube (71) is inserted into the outer ring sealing cavity (61) or the inner ring sealing cavity (62), and the outer end is connected to the adapter (72); the adapter (72) is capable of transmitting signals to the outside.

2. The test piece for rapid measurement of flow area of ​​a guide as claimed in claim 1, characterized in that: Sealing grooves are provided between the guide (6) and the outer ring (1) of the convergent straightening section and the inner ring (2) of the convergent straightening section, between the outlet outer ring (3) and the outer ring (1) of the convergent straightening section and the guide (6), between the outlet inner ring (4) and the inner ring (2) of the convergent straightening section and the guide (6), and between the protective ring (5) and the outlet inner ring (4) and the outlet outer ring (3), and flexible sealing rings (11) are provided in the sealing grooves for end face sealing.

3. The test piece for rapid measurement of flow area of ​​a guide as claimed in claim 2, characterized in that: The flexible sealing ring (11) is made of fluororubber.

4. The test piece for rapid measurement of flow area of ​​a guide as claimed in claim 1, characterized in that: It also comprises an installation rotation support section (21), wherein the installation rotation support section (21) is a rotating body arranged to rotate around the axis of the guide (6), and the installation rotation support section (21) is connected to the inner ring (2) of the convergent straightening section.

5. The test piece for rapid measurement of flow area of ​​a guide as claimed in claim 1, characterized in that: The convergence curve at the inlet of the guide (6) corresponding to the outer ring (1) of the convergent and rectifying section and the convergence curve at the inlet of the guide (6) corresponding to the inner ring (2) of the convergent and rectifying section are both Witosinski curves or bicubic curves.

6. The test piece for rapid measurement of flow area of ​​a guide as claimed in claim 1, characterized in that: For a guide vane (6) with non-axial air intake, a guide vane section is arranged on a convergent and straightening section outer ring (1) and a convergent and straightening section inner ring (2), wherein the guide vane section comprises a guide vane barrel (9), a guide vane outer ring (8), and a guide vane inner ring (10), wherein the guide vane barrel (9) is integrally connected to the guide vane outer ring (8) and the guide vane inner ring (10).

7. A test piece assembly method for rapid measurement of flow area of ​​a guide, using the test piece as claimed in any one of claims 1 to 6, characterized in that: include: A three-dimensional spatial coordinate system is established, with the X direction in the three-dimensional spatial coordinate system facing upward, and the outer ring (1) of the convergent rectifying section and the inner ring (2) of the convergent rectifying section are concentrically placed on an installation platform with the same horizontal reference; The flexible sealing ring (11) is installed in the corresponding sealing grooves between the outer ring (1) of the convergent straightening section, the inner ring (2) of the convergent straightening section and the guide (6); the guide (6) is installed on the outer ring (1) of the convergent straightening section and the inner ring (2) of the convergent straightening section; A flexible sealing ring (11) is installed between the outlet outer ring (3) and the convergent rectifying section outer ring (1) and the guide (6), and between the outlet inner ring (4) and the convergent rectifying section inner ring (2) and the guide (6), and the outlet outer ring (3) and the outlet inner ring (4) are respectively installed and fixed between the convergent rectifying section outer ring (1) and the convergent rectifying section inner ring (2); Install the protection ring (5) at the outlet of the guide (6); The entire test piece is installed on a special tester by installing the rotating support section (21), and the pressure measurement installation of the pressure measurement structure (7) is completed.

8. The test piece assembly method for rapid measurement of the flow area of ​​a guide as claimed in claim 7, characterized in that: For a test piece having a guide vane cascade segment, the guide vane cascade segment is installed between a convergent and straightening segment outer ring (1), a convergent and straightening segment inner ring (2) and a guide (6).

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