A composite material air intake casing blowing test piece

Abstract

This application belongs to the field of test piece design, and specifically relates to a composite inlet casing blowing test piece, including a front measuring casing, a composite inlet mounting casing, an exhaust casing, a composite inlet casing fan section, a composite VIGV blade, a blade rocker arm, an angle adjustment stake, an angle locking nut, a cap support liner, and a rear section of the inner ring. The composite inlet mounting casing adopts a left-right split structure, with the composite inlet casing fan section snapped into the inner and outer ring mounting slots of the casing; the angle adjustment stake, in conjunction with the angle locking nut, completes the adjustment and locking of the deflection angle of the composite VIGV blade; the inner wall of the casing and the cap support liner respectively compensate for the stiffness loss of the outer and inner rings of the truncated fan section; the front measuring casing is equipped with an inlet airflow measurement position and a lifting point, and the outer wall of the outer ring of the casing is equipped with angle markings. It can simulate the actual intake airflow path conditions of an engine, suppress the flow field distortion caused by fan section deformation, and provide intuitive and reliable angle control, making it suitable for blowing performance testing of composite inlet casing fan sections and composite VIGV blades.

Description

Technical Field

[0001] This application belongs to the field of test piece design, and specifically relates to a composite material air intake casing blowing test piece. Background Technology

[0002] With the increasing demands for lightweight and forward stealth in aero engines, composite air intake casings and VIGV blades are key technologies for improving the performance of next-generation engines. Air blowing tests on composite components are an important step in verifying their structural reliability and are also preliminary tests before full-engine testing.

[0003] Currently, conventional wind tests for stator casings are used to assess the adhesion of coatings on composite or metal casing surfaces. These tests often involve cutting a portion (casing or support plate) for typical component-level wind testing or using the entire casing for component testing. Wind tests assessing structural strength and reliability are mostly used for blade-type parts; research on stator casing components is relatively limited.

[0004] At present, the commonly used typical component-level air blowing test scheme is insufficient to assess and verify the structural strength and reliability of the entire all-composite intake casing and VIGV blades;

[0005] Directly using a complete composite intake casing for component performance testing requires a supporting test bench, and the entire test has an excessively high demand for inlet gas, resulting in extremely high testing costs.

[0006] Therefore, how to design more effective test specimens is a problem that needs to be solved. Summary of the Invention

[0007] To address the aforementioned issues, this application provides a composite inlet casing air-blowing test piece to solve the problem that existing air-blowing test schemes are insufficient to assess and verify the structural strength and reliability of the entire all-composite inlet casing and VIGV blades.

[0008] The technical solution of this application is: a composite inlet casing blowing test piece, including a front measuring casing, a composite inlet mounting casing, an exhaust casing, a composite inlet casing fan section, a composite VIGV blade, a blade rocker arm, an angle adjustment stake, an angle locking nut, a cap support liner, and an inner ring rear section.

[0009] The composite air intake mounting casing is a left-right split casing. The composite air intake mounting casing has an inner ring mounting groove and an outer ring mounting groove. The cuts at both ends of the fan section of the composite air intake casing are engaged in the inner ring mounting groove and the outer ring mounting groove.

[0010] The rear section of the inner ring is fixed to the composite air inlet mounting casing by flange bolts. The rear section of the inner ring and the other components together form the internal flow path of the test piece.

[0011] The front measuring casing is mounted on the air intake side of the composite air intake mounting casing, and the exhaust casing is mounted on the exhaust side of the composite air intake mounting casing. The exhaust casing is used to construct the internal and external flow paths of the exhaust section.

[0012] The composite air intake mounting housing has a VIGV blade mounting hole, and the composite VIGV blade is assembled in the VIGV blade mounting hole. The composite VIGV blade is fixedly connected to the blade rocker arm. Two angle adjustment pins are respectively pressed against both sides of the blade rocker arm, and the angle locking nut cooperates with the angle adjustment pin to lock and fix the deflection angle of the composite VIGV blade.

[0013] Preferably, the cap support liner is fixedly installed on the composite air intake mounting casing via two side flanges, and the cap support liner is used to support the inner ring position of the fan section of the composite air intake casing.

[0014] Preferably, the front measuring casing is provided with an inlet airflow measurement position and a lifting point. The inlet airflow measurement position is used to collect inlet airflow parameters for the blowing test, and the lifting point is used for the overall lifting and assembly of the test piece.

[0015] Preferably, the outer ring of the composite air intake mounting casing is provided with angle markings, which are used to mark and read the actual deflection angle of the composite VIGV blades.

[0016] Preferably, the inner wall of the composite air intake mounting casing contacts and supports the outer wall of the composite air intake casing fan section, compensating for the loss of outer ring stiffness caused by the truncation of the composite air intake casing fan section; the cap support liner provides support to the inner ring of the composite air intake casing fan section, compensating for the loss of inner ring stiffness caused by the truncation of the fan section.

[0017] Preferably, the circumferential sector angle of the composite air intake casing sector can be adaptively adjusted according to the air supply capacity of the test bench.

[0018] The composite inlet casing blowing test specimen of this application has the following advantages:

[0019] By selecting a complete sector of the composite intake casing, the stress and load-bearing conditions of each part of the entire intake casing can be effectively simulated. Furthermore, the size of the entire sector can be adjusted according to the air supply capacity of the test bench, ensuring both testing requirements are met and significantly reducing testing costs and test bench requirements. Additionally, structures such as mounting slots and inner lining plates compensate for issues such as composite material cuts and stiffness reduction caused by selecting a "sector" for testing, ensuring the accuracy and reliability of the test content and results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this application;

[0021] Figure 2 This is a sectional view of the composite intake mounting casing of this application;

[0022] Figure 3 This is a schematic diagram of the adjustment structure of the composite VIGV blade in this application.

[0023] 1. Front measuring housing; 2. Composite inlet mounting housing; 3. Exhaust housing; 4. Composite inlet housing fan section; 5. Inner ring mounting groove; 6. Blade rocker arm; 7. Angle adjustment post; 8. Angle locking nut; 9. Cap support liner; 10. Rear section of inner ring; 11. Outer ring mounting groove. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0025] The first aspect of this application provides a composite inlet casing blowing test specimen, such as Figures 1-3 It includes a front measuring housing 1, a composite intake mounting housing 2, an exhaust housing 3, a composite intake housing fan section 4, a composite VIGV blade, a blade rocker arm 6, an angle adjustment post 7, an angle locking nut 8, a cap support liner 9, and an inner ring rear section 10.

[0026] The composite air intake mounting casing 2 is a left-right split casing. The composite air intake mounting casing 2 has an inner ring mounting groove 5 and an outer ring mounting groove 11. The cuts at both ends of the composite air intake casing fan section 4 are engaged in the inner ring mounting groove 5 and the outer ring mounting groove 11.

[0027] The inner ring rear section 10 is fixed to the composite air inlet mounting casing 2 by flange bolts. The inner ring rear section 10 and the other components together form the inner flow path of the test piece.

[0028] The front measuring casing 1 is mounted on the intake side of the composite intake mounting casing 2, and the exhaust casing 3 is mounted on the exhaust side of the composite intake mounting casing 2. The exhaust casing 3 is used to construct the internal and external flow paths of the exhaust section.

[0029] The composite air intake mounting housing 2 has a VIGV blade mounting hole. The composite VIGV blade is assembled in the VIGV blade mounting hole and is fixedly connected to the blade rocker arm 6. Two angle adjustment pins 7 are respectively pressed against both sides of the blade rocker arm 6, and the angle locking nut 8 cooperates with the angle adjustment pins 7 to lock and fix the deflection angle of the composite VIGV blade.

[0030] When adjusting the angle of composite VIGV blades, the following steps are included:

[0031] S1. Assemble the composite VIGV blade into the VIGV blade mounting hole of the composite inlet mounting housing 2, and fix the blade rocker arm 6 to the composite VIGV blade.

[0032] S2. Rotate the angle adjustment stakes 7 on both sides to make the angle adjustment stakes 7 press against both sides of the blade rocker arm 6 respectively. Adjust the composite VIGV blade to the target angle according to the angle markings on the outer ring of the composite air intake mounting casing 2.

[0033] S3. Tighten the angle locking nut 8 to lock the angle adjustment stake 7, complete the angle locking of the composite VIGV blade, and carry out the blowing test.

[0034] It integrates the complete functions of flow path construction, airflow testing, quick disassembly and replacement of composite fan sections, and VIGV blade angle adjustment and locking. It can simulate the working conditions of the real engine intake casing and complete the blowing test of composite intake casing fan section 4 and composite VIGV blades.

[0035] The composite air intake mounting casing 2 adopts a left-right split design. The fan segments are assembled by snapping into the inner and outer ring mounting slots 11 with cutouts. The fan segments are easy to disassemble and assemble, and it is convenient to replace fan segments with different configurations to carry out comparative tests.

[0036] The structure employs two angle adjustment piles 7, double-sided blade rocker arms 6, and angle locking nuts 8 for locking, which can flexibly adjust and reliably fix the deflection angle of composite VIGV blades, meeting the requirements of multiple sets of blowing tests under different blade angle conditions.

[0037] Preferably, the cap support liner 9 is fixedly installed on the composite air intake mounting housing 2 via the flanges on both sides. The cap support liner 9 is used to support the inner ring position of the composite air intake housing sector 4. The cap support liner 9 achieves a secure positioning installation via the flanges on both sides; it applies radial constraint support to the inner ring of the composite air intake housing sector 4, improves the stress conditions of the inner ring of the sector, and suppresses the vibration and deformation of the inner ring under the aerodynamic load of the blowing air.

[0038] Preferably, the front measuring housing 1 is equipped with an inlet airflow measurement position and a lifting point. The inlet airflow measurement position is used to collect inlet airflow parameters for the blowing test, and the lifting point is used for the overall lifting and assembly of the test piece. The inlet airflow measurement position can directly collect the real airflow parameters at the inlet of the blowing test, providing raw basic data for test data calibration and post-processing, and improving the accuracy of the blowing test results.

[0039] Preferably, angle markings are provided on the outer wall of the outer ring of the composite air intake mounting casing 2. These angle markings are used to mark and read the actual deflection angle of the composite VIGV blades. With the angle markings on the outer wall of the casing's outer ring, the actual deflection angle of the blades can be read directly without additional angle detection fixtures. This facilitates quick verification of the blade setting angle before testing and allows for real-time checking of any blade angle deviations during testing, reducing angle setting errors.

[0040] Preferably, the inner wall of the composite intake mounting casing 2 contacts and supports the outer wall of the composite intake casing fan segment 4, compensating for the loss of outer ring stiffness caused by the truncation of the composite intake casing fan segment 4; the cap support liner 9 provides support for the inner ring of the composite intake casing fan segment 4, compensating for the loss of inner ring stiffness caused by the truncation of the fan segment. The truncated composite fan segment is circumferentially incomplete, inherently possessing a deficiency in the stiffness of both the inner and outer rings; the stiffness loss caused by the truncation of the fan segment is compensated by the bidirectional contact support between the inner wall of the casing and the inner ring of the cap support liner 9.

[0041] Preferably, the circumferential sector angle of the composite inlet casing sector 4 can be adaptively adjusted according to the air supply capacity of the test bench. The circumferential sector angle of the sector can be flexibly configured to adapt to wind tunnel test benches with different air supply flow rates and air supply pressure levels; when the air supply capacity of the test bench is insufficient, a sector with a small circumferential angle can be selected to reduce the overall air supply flow requirement of the test piece.

[0042] In summary, this application has the following advantages:

[0043] By selecting a complete sector of the composite intake casing, the stress and load-bearing conditions of each part of the entire intake casing can be effectively simulated. Furthermore, the size of the entire sector can be adjusted according to the air supply capacity of the test bench, ensuring both testing requirements are met and significantly reducing testing costs and test bench requirements. Additionally, structures such as mounting slots and inner lining plates compensate for issues such as composite material cuts and stiffness reduction caused by selecting a "sector" for testing, ensuring the accuracy and reliability of the test content and results.

[0044] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A composite inlet cowl blowdown test article, comprising: It includes the front measuring casing (1), composite air intake mounting casing (2), exhaust casing (3), composite air intake casing fan section (4), composite VIGV blade, blade rocker arm (6), angle adjustment post (7), angle locking nut (8), cap support liner (9), and inner ring rear section (10). The composite air intake mounting casing (2) is a left-right split casing. The composite air intake mounting casing (2) has an inner ring mounting groove (5) and an outer ring mounting groove (11). The cuts at both ends of the composite air intake casing fan section (4) are engaged in the inner ring mounting groove (5) and the outer ring mounting groove (11). The inner ring rear section (10) is fixed to the composite air inlet mounting casing (2) by flange bolts. The inner ring rear section (10) and the other components together form the inner flow path of the test piece. The front measuring casing (1) is mounted on the intake side of the composite air intake mounting casing (2), and the exhaust casing (3) is mounted on the exhaust side of the composite air intake mounting casing (2). The exhaust casing (3) is used to construct the internal and external flow paths of the exhaust section. The composite air intake mounting housing (2) has a VIGV blade mounting hole. The composite VIGV blade is assembled in the VIGV blade mounting hole and is fixedly connected to the blade rocker arm (6). Two angle adjustment pins (7) are respectively pressed against both sides of the blade rocker arm (6). The angle locking nut (8) cooperates with the angle adjustment pins (7) to lock and fix the deflection angle of the composite VIGV blade.

2. The composite inlet cowl blowdown test piece of Claim 1, wherein The cap support liner (9) is fixedly installed on the composite air intake mounting casing (2) through the flanges on both sides. The cap support liner (9) is used to support the inner ring position of the fan section (4) of the composite air intake casing.

3. The composite inlet cowl test article of Claim 2, wherein The front measuring casing (1) is provided with an inlet airflow measurement position and a hoisting point. The inlet airflow measurement position is used to collect inlet airflow parameters for the blowing test, and the hoisting point is used for the overall hoisting and assembly of the test piece.

4. The composite inlet casing blowing test specimen as described in claim 1, characterized in that, Angle markings are provided on the outer ring of the composite air intake mounting casing (2), which are used to mark and read the actual deflection angle of the composite VIGV blades.

5. The composite inlet casing blowing test specimen as described in claim 4, characterized in that, The inner wall of the composite air intake mounting casing (2) is in contact with and supports the outer wall of the composite air intake casing fan section (4), compensating for the loss of outer ring stiffness caused by the truncation of the composite air intake casing fan section (4); the cap support liner (9) provides support for the inner ring of the composite air intake casing fan section (4), compensating for the loss of inner ring stiffness caused by the truncation of the fan section.

6. The composite inlet casing blowing test specimen as described in claim 4, characterized in that, The circumferential sector angle of the composite air intake casing sector (4) can be adaptively adjusted according to the air supply capacity of the test bench.

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