Test piece for rapidly measuring flow area of guider and assembly method

Abstract

The invention belongs to the technical field of aero-engine turbine guider flow area measurement, and particularly relates to a test piece for rapidly measuring the guider flow area and an assembly method, and the test piece comprises a convergence rectification section outer ring, a convergence rectification section inner ring, an outlet outer ring, an outlet inner ring, a protection ring and a guider. The convergence rectification section outer ring and the convergence rectification section inner ring are correspondingly arranged inside and outside, the convergence rectification section outer ring is connected with an outer ring inlet of the guider, and the convergence rectification section inner ring is connected with an inner ring inlet of the guider; by means of design of an inlet convergence rectification section and an inlet contraction channel, axial size limitation, secondary sealing, sealing pressure monitoring, reduction of component design and the like, a thin boundary layer and high uniformity of a flow field of the inlet of the guider are ensured, high sealing performance of a test piece structure is ensured, the structural consistency of batch guider test pieces is ensured, and the test efficiency is improved. Quick replacement of batch guiders is ensured; finally, rapid and high-accuracy measurement of a plurality of guiders in batches is ensured.

Description

Technical Field

[0001] The present application belongs to the technical field of flow area measurement of a turbine guide vane of an aircraft engine, and in particular relates to a test piece and an assembly method for rapid measurement of flow area of ​​a guide vane. Background Art

[0002] The turbine guide vane is a key component of an aircraft turbine engine. The size of its flow area is a key parameter for matching various components, which directly affects the engine's flow, thrust, surge margin, exhaust temperature and other parameters, and has an important impact on the engine's performance and stability. During the batch production of engine models, it is necessary to quickly and accurately measure the consistency of the flow area of ​​each guide vane to meet the batch production quality and timeliness. Based on this demand, a special tester dedicated to the rapid measurement of the guide vane flow area has been developed. The typical turbine guide vane structure is as follows: Figure 1 As shown in the figure, in order to realize the rapid assembly and accurate measurement of the guide and the special tester, the prerequisite is that the incoming flow boundary layer is thin, the flow field is uniform, the sealing is good, and it can be quickly replaced. Therefore, it is necessary to design a new test piece for the rapid measurement of the flow area of ​​the guide according to the special measurement tester and the guide structure, and give the assembly method. Summary of the invention

[0003] The purpose of this application is to provide a test piece and an assembly method for rapid measurement of the flow area of ​​a guide, so as to solve the problems of low uniformity of the flow field of the guide and thick boundary layer.

[0004] The technical solution of the present application is: a test piece for rapid measurement of the flow area of ​​a guide, comprising a convergent rectifying section outer ring, a convergent rectifying section inner ring, an outlet outer ring, an outlet inner ring, a protection ring and a guide; The outer ring of the convergent straightening section and the inner ring of the convergent straightening section are arranged correspondingly inside and outside, the outer ring of the convergent straightening section is connected to the outer ring inlet of the guide, and the inner ring of the convergent straightening section is connected to the inner ring inlet of the guide; the outlet outer ring is arranged outside the outlet of the guide and the outlet outer ring is connected to the outer ring of the convergent straightening section and the outer ring inlet of the guide at the same time, the outlet inner ring is arranged inside the outlet of the guide and the outlet inner ring is connected to the inner ring of the convergent straightening section and the inner ring inlet of the guide at the same time; the protective ring is arranged correspondingly at the outlet position of the guide, the inner side of the protective ring is connected to the outlet inner ring, and the outer side is connected to the outlet outer ring; The outer ring of the convergent straightening section, the inner ring of the convergent straightening section, the outer ring of the outlet, the inner ring of the outlet, the protective ring and the guide are all rotating bodies; the front end surface of the outer ring of the convergent straightening section cooperates with a special tester; a conical straightening convergence channel is formed between the outer ring of the convergent straightening section and the inner ring of the convergent straightening section.

[0005] Preferably, sealing grooves are provided between the guide and the outer ring and inner ring of the convergent straightening section, between the outlet outer ring and the outer ring of the convergent straightening section and the guide, between the outlet inner ring and the inner ring of the convergent straightening section and the guide, and between the protective ring and the outlet inner ring and the outlet outer ring, and flexible sealing rings are provided in the sealing grooves for end face sealing.

[0006] Preferably, the flexible sealing ring is made of fluororubber.

[0007] Preferably, a seal is set between the outer side of the guide outer ring and the outer ring of the convergent straightening section and the outlet outer ring to form an outer ring sealed cavity; and a seal is set between the inner side of the guide inner ring and the inner ring of the convergent straightening section and the outlet inner ring to form an inner ring sealed cavity.

[0008] Preferably, a pressure measuring structure is provided in both the outer ring sealing cavity and the inner ring sealing cavity; the pressure measuring structure comprises a pressure lead tube and an adapter; the inner end of the pressure lead tube 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 the signal to the outside.

[0009] Preferably, it also includes an installation rotation support section, which is a rotating body arranged to rotate around the axis of the guide, and the installation rotation support section is connected to the inner ring of the convergent straightening section.

[0010] Preferably, the convergence curve at the guide inlet corresponding to the outer ring of the convergent and straightening section and the convergence curve at the guide inlet corresponding to the inner ring of the convergent and straightening section are both Witosinski curves or bicubic curves.

[0011] Preferably, for the guide vane with non-axial air intake, a guide vane segment is arranged on the outer ring of the convergent straightening section and the inner ring of the convergent straightening section, and the guide vane segment includes a guide vane cylinder, a guide vane outer ring, and a guide vane inner ring, and the guide vane cylinder is integrally connected with the guide vane outer ring and the guide vane inner ring.

[0012] As a specific implementation, a test piece assembly method for rapid measurement of flow area of ​​a guide includes: Establish a three-dimensional spatial coordinate system, with the X direction in the three-dimensional spatial coordinate system facing upward, and place the outer ring of the convergent rectifier section and the inner ring of the convergent rectifier section concentrically on the installation platform with the same horizontal reference; Install the flexible sealing ring in the corresponding sealing grooves between the outer ring of the convergent rectifier section, the inner ring of the convergent rectifier section and the guide; install the guide on the outer ring of the convergent rectifier section and the inner ring of the convergent rectifier section; Install a flexible sealing ring between the outlet outer ring and the outer ring and guide of the convergent rectifier section, and between the outlet inner ring and the inner ring and guide of the convergent rectifier section, and install and fix the outlet outer ring and the outlet inner ring to the outer ring and the inner ring of the convergent rectifier section respectively; Install the protection ring at the guide outlet; The entire test piece is installed on the special tester by installing the rotating support section, and the pressure measurement installation of the pressure measurement structure is completed.

[0013] Preferably, for the test piece having the guide vane segment, the guide vane segment is installed between the outer ring of the convergent and straightening segment, the inner ring of the convergent and straightening segment and the guide.

[0014] The test piece and assembly method for rapid measurement of the flow area of ​​the guide valve in the present application ensure a thin boundary layer and high uniformity of the inlet flow field of the guide valve, high sealing performance of the test piece structure, structural consistency of batch guide valve test pieces, and rapid replacement of batch guide valves by means of an inlet convergent flow straightening section, an inlet contraction channel design, axial dimension restriction, secondary sealing, sealing pressure monitoring, and reduced component design. This ultimately ensures rapid and high-accuracy measurement of multiple batch guide valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0016] Figure 1 It is a structural diagram of a turbine guide vane in the background technology; Figure 2 This is a cross-sectional view of the overall structure of this application; Figure 3 This is a schematic diagram of the structure of a test piece with a guide vane section in this application; Figure 4 This is a schematic diagram of the structure of the outer ring of the convergent rectifying section and the inner ring of the convergent rectifying section of this application; Figure 5 This is a schematic diagram of the outer ring structure of the export for this application; Figure 6 This is a schematic diagram of the inner ring structure of the exit for this application.

[0017] 1. Outer ring of convergent and rectifier section; 2. Inner ring of convergent and rectifier section; 21. Install the rotating support section; 3. Outer ring of outlet; 4. Inner ring of outlet; 5. Protective ring; 6. Guide; 61. Outer ring sealing cavity; 62. Inner ring sealing cavity; 7. Pressure measurement structure; 71. Pressure lead pipe; 72. Adapter; 8. Outer ring of guide vane; 9. Guide vane cylinder; 10. Inner ring of guide vane; 11. Flexible sealing ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] A test piece for rapid measurement of the flow area of ​​a guide, such as Figure 2-Figure 3 As shown, it includes a convergent and straightening section outer ring 1, a convergent and straightening section inner ring 2, an outlet outer ring 3, an outlet inner ring 4, a protective ring 5 and a guide 6.

[0020] 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 connected to the outer ring inlet of the convergent straightening section 1 and the guide 6 at the same time. The outlet inner ring 4 is arranged inside the outlet of the guide 6 and the outlet inner ring 4 is connected to the inner ring 2 of the convergent straightening section and the inner ring inlet of the guide 6 at the same time. The protective ring 5 is arranged correspondingly at the outlet position of the guide 6, and the inner side of the protective ring 5 is connected to the outlet inner ring 4, and the outer side is connected to the outlet outer ring 3. The structures of the outlet outer ring 3 and the outlet inner ring 4 are as follows: Figure 4-Figure 5 shown.

[0021] 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.

[0022] A conical rectifying and converging channel is formed between the outer ring 1 of the convergent rectifying section and the inner ring 2 of the convergent rectifying section, ensuring that the inlet mainstream area of ​​the guide 6 is more than 80% of the entire flow area.

[0023] Preferably, 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 a flexible sealing ring 11 is provided in the sealing groove for end face sealing to ensure sealing performance.

[0024] Preferably, the flexible sealing ring 11 is made of fluororubber.

[0025] Preferably, a seal is set between the outer side of the outer ring of the guide 6 and the outer ring 1 of the convergent straightening section and the outlet outer ring 3 to form an outer ring sealing cavity 61; a seal is set between the inner side of the inner ring of the guide 6 and the inner ring 2 of the convergent straightening section and the outlet inner ring 4 to form an inner ring sealing cavity 62 to achieve secondary sealing of mainstream leakage.

[0026] Preferably, 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 can transmit the signal to the outside to realize the pressure signal collection.

[0027] Preferably, the left end surface of the outer ring 1 of the convergent and straightening section and the left end surface of the inner ring 2 of the convergent and straightening section are in the same axial position to ensure synchronization of the inner and outer fluid flows.

[0028] Preferably, the convergence curve at the inlet of the guide 6 corresponding to the outer ring 1 of the convergent straightening section and the convergence curve at the inlet of the guide 6 corresponding to the inner ring 2 of the convergent straightening section are both Witosinski curves or bicubic curves. The convergence curve at the inlet of the guide 6 corresponding to the outer ring 1 of the convergent straightening section and the convergence curve at the inlet of the guide 6 corresponding to the inner ring 2 of the convergent straightening section are mirror-symmetric curves, ensuring a thin boundary layer and high uniformity of the incoming flow.

[0029] Preferably, the axial distance between the rectifying convergence channel and the leading edge of the mid-diameter of the blade of the guide 6 is L1, and L1 is ≤ 0.5 times the axial chord length C of the mid-diameter of the blade of the guide 6. Figure 2 .

[0030] For multiple guides 6 produced in the same batch, the axial distance L2 between the trailing edge of the blade mid-diameter of the guide 6 and the outlet end face of the test piece should be consistent, such as Figure 2 .

[0031] like Figure 6 As shown, in a specific example, for the guide device 6 with non-axial air intake, a guide vane section is arranged on the outer ring 1 of the convergent straightening section and the inner ring 2 of the convergent straightening section, and the guide vane section includes a guide vane cylinder 9, a guide vane outer ring 8, and a guide vane inner ring 10, and the guide vane cylinder 9 is integrally connected with the guide vane outer ring 8 and the guide vane inner ring 10. The guide vane section is sealed with the outer ring 1 of the convergent straightening section, the inner ring 2 of the convergent straightening section, and the guide device 6 to form an outer ring sealing cavity 61 and an inner ring sealing cavity 62. The sealing cooperation mode of the guide vane section with the outer ring 1 of the convergent straightening section, the inner ring 2 of the convergent straightening section, and the guide device 6 is the same as the above, and they are all sealed with a flexible sealing ring 11. By setting the guide vane, the fluid entering the guide device 6 is further rectified to improve the guide stability.

[0032] Preferably, the guide channel formed by the guide vane outer ring 8 and the guide vane inner ring 10 is a contraction channel, wherein the contraction angle α of the contraction channel is 1° to 5°.

[0033] The axial distance L3 between the trailing edge of the mid-diameter of the guide vane and the leading edge of the mid-diameter of the guide vane 6 should satisfy L3≤2 times the axial chord length C of the mid-diameter of the guide vane 6.

[0034] Preferably, it also includes an installation rotation support section 21, which is a rotating body arranged to rotate around the axis of the guide 6. The installation rotation support section 21 is connected to the inner ring 2 of the convergence and rectification section, and the bench installation tool can be used to realize the test piece picking, rotation and adjustment of the installation position.

[0035] As a specific implementation, a test piece assembly method for rapid measurement of the flow area of ​​the guide 6 is also included, comprising the following steps: Step 1: Establish a three-dimensional spatial coordinate system, with the X direction in the three-dimensional spatial coordinate system facing upward, and place the outer ring 1 of the convergent rectifier section and the inner ring 2 of the convergent rectifier section concentrically on the installation platform with the same horizontal reference; Preferably, for the test piece having the guide vane segment, the guide vane segment is installed between the convergent and straightening segment outer ring 1 , the convergent and straightening segment inner ring 2 and the guide 6 .

[0036] Step 2: Install the flexible sealing ring 11 in the corresponding sealing grooves between the outer ring 1 of the convergent rectifying section, the inner ring 2 of the convergent rectifying section and the guide 6; install the guide 6 on the outer ring 1 of the convergent rectifying section and the inner ring 2 of the convergent rectifying section; Step 3: Install a flexible sealing ring 11 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 install and fix the outlet outer ring 3 and the outlet inner ring 4 to the convergent rectifying section outer ring 1 and the convergent rectifying section inner ring 2 respectively; Step 4: Install the protection ring 5 at the outlet of the guide 6; Step 5: Install the entire test piece on the dedicated tester by installing the rotating support section 21 , and complete the pressure measurement installation of the pressure measurement structure 7 .

[0037] In summary, this application ensures a thin boundary layer and high uniformity in the guide inlet flow field, high sealing of the test piece structure, structural consistency of batch guide test pieces, and rapid replacement of batch guides through means such as an inlet convergent straightening section, inlet contraction channel design, axial size restriction, secondary sealing, sealing pressure monitoring, and reduced component design; ultimately, it ensures rapid and high-accuracy measurement of multiple guides in a batch.

[0038] Finally, it should be noted that: the drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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; and 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).

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: The outer side of the outer ring of the guide (6) is sealed with the outer ring (1) of the convergent and straightening section and the outer ring (3) of the outlet, forming an outer ring sealing cavity (61); the inner side of the inner ring of the guide (6) is sealed with the inner ring (2) of the convergent and straightening section and the inner ring (4) of the outlet, forming an inner ring sealing cavity (62).

5. The test piece for rapid measurement of flow area of ​​a guide as claimed in claim 4, characterized in that: 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.

6. 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.

7. 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.

8. 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).

9. 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 8, 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.

10. The test piece assembly method for rapid measurement of flow area of ​​a guide as claimed in claim 9, 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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