A wind tunnel pressure test piece with multiple chambers connected

Abstract

A wind tunnel pressure test piece with multiple chambers connected belongs to the field of wind tunnel test technology. The present invention solves the problem that the current pressure test shape pressure distribution measurement requirements are not limited to the outer surface, but also involve the measurement requirements of some flow channels or cavities and other structures inside the aircraft. The main body of the present invention is connected with a front rectifier and an angle sensor, and the main body is symmetrically provided with a first main cavity and a second main cavity, a first front sub-cavity and a second front sub-cavity, a first outer sub-cavity and a second outer sub-cavity, a first rear sub-cavity and a second rear sub-cavity, a first front outer sub-cavity and a second front outer sub-cavity, a first rear outer sub-cavity and a second rear outer sub-cavity, a left main cavity assembly and a right main cavity assembly are installed on the main body, a pressure scanning valve block and an amplifier are installed on the main body, and the bottom of the main body is connected to the support through a support adapter. A wind tunnel pressure test piece with multiple chambers connected according to the present invention realizes static and dynamic pressure measurement in the main cavity of the test piece, and also takes into account the pressure measurement of the inner and outer surfaces of the main cavity cover.

Description

Technical Field

[0001] The invention belongs to the technical field of wind tunnel testing, and specifically relates to a wind tunnel pressure testing piece with multiple chambers connected. Background Art

[0002] Wind tunnel pressure test is a test that measures the surface pressure distribution of a model in a wind tunnel. It provides the original data of aerodynamic load distribution for aircraft development by measuring the pressure distribution on the surfaces of aircraft model components such as wings, fuselage, tail, control surfaces, external attachments, etc. Therefore, pressure test is an important means to study the aerodynamic shape performance of aircraft. With the development of aircraft, the demand for measuring the shape pressure distribution is not only limited to the outer surface, but also involves some flow channels or cavities inside the aircraft, so as to comprehensively and effectively verify the aerodynamic performance of the aircraft.

[0003] Therefore, the present application proposes a wind tunnel pressure test piece with multiple connected cavities to solve the above problems. Summary of the invention

[0004] The purpose of the research and development of the present invention is to solve the problem that the current pressure test shape pressure distribution measurement demand is not limited to the outer surface, but also involves the measurement demand problem of some flow channels or cavities inside the aircraft. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0005] The technical solution of the present invention:

[0006] A wind tunnel pressure test piece with multiple chambers connected comprises a front rectifier, a main body, an angle sensor, a left main chamber assembly, a right main chamber assembly, a pressure scanning valve block, a support adapter and a support. The front end of the main body is connected with the front rectifier and the angle sensor. The main body has a first main chamber and a second main chamber, which are symmetrically arranged in the main body. A first front sub-chamber and a first front outer sub-chamber are arranged in front of the first main chamber, a first rear sub-chamber and a first rear outer sub-chamber are arranged behind the first main chamber, a first outer sub-chamber is arranged outside the first main chamber, a second front sub-chamber and a second front outer sub-chamber are arranged in front of the second main chamber, a second rear sub-chamber and a second rear outer sub-chamber are arranged behind the second main chamber, and a second outer sub-chamber is arranged outside the second main chamber. The left main chamber assembly and the right main chamber assembly are symmetrically mounted on the main body, the left main chamber assembly is arranged at the first main chamber, and the right main chamber assembly is arranged at the second main chamber. The pressure scanning valve block and an amplifier are mounted on the main body and arranged between the first main chamber and the second main chamber, and the bottom of the main body is connected to the support through the support adapter.

[0007] Furthermore, the left main chamber assembly includes a left main front chamber wall, a left main outer chamber wall, a left main inner chamber wall and a left main rear chamber wall; the left main front chamber wall and the left main rear chamber wall are connected between the left main outer chamber wall and the left main inner chamber wall; a plurality of static pressure measuring points are respectively arranged on the left main front chamber wall, the left main outer chamber wall, the left main inner chamber wall and the left main rear chamber wall; pressure measuring tubes are respectively arranged on the left main front chamber wall, the left main outer chamber wall, the left main inner chamber wall and the left main rear chamber wall; and each pressure measuring tube is connected to the pressure measuring scanning valve block.

[0008] Furthermore, a first connecting hole is processed on the left main front cavity wall, and the first main cavity and the first front sub-cavity are connected through the first connecting hole; a second connecting hole is processed on the left main outer cavity wall, and the first main cavity and the first outer sub-cavity are connected through the second connecting hole; a third connecting hole is processed on the left main rear cavity wall, and the first main cavity and the first rear sub-cavity are connected through the third connecting hole; a fourth connecting hole is provided at the connection between the left main front cavity wall and the left main outer cavity wall, and the first main cavity and the first front outer sub-cavity are connected through the fourth connecting hole; a fifth connecting hole is provided at the connection between the left main outer cavity wall and the left main rear cavity wall, and the first main cavity and the first rear outer sub-cavity are connected through the fifth connecting hole.

[0009] Furthermore, a left main chamber cover is connected to the left main inner chamber wall, and the left main chamber cover includes a left main chamber cover body, a left main chamber cover variable angle connection block, a left main chamber cover wiring cover plate and a left main chamber cover body middle cover plate. The left main chamber cover body is connected to the left main inner chamber wall through multiple left main chamber cover variable angle connection blocks, and the bottom of the left main chamber cover body is connected to the left main chamber cover wiring cover plate and the left main chamber cover body middle cover plate. Multiple static pressure measuring points are arranged on the inner and outer surfaces of the left main chamber cover body, and the pressure measuring tube on the left main chamber cover body is connected to the pressure measuring scanning valve block.

[0010] Furthermore, the right main cavity assembly includes a right main front cavity wall, a right main outer cavity wall, a right main inner cavity wall and a right main rear cavity wall; the right main front cavity wall and the right main rear cavity wall are connected between the right main outer cavity wall and the right main inner cavity wall; a plurality of dynamic pressure measuring points are respectively arranged on the right main front cavity wall, the right main outer cavity wall, the right main inner cavity wall and the right main rear cavity wall; the dynamic sensors respectively arranged on the right main front cavity wall, the right main outer cavity wall, the right main inner cavity wall and the right main rear cavity wall are connected to the amplifier on the main body through cables; a right main front cavity wall wiring cover is installed on the right main front cavity wall, a right main outer cavity wall wiring cover is installed on the right main outer cavity wall, and a right main rear cavity wall wiring cover is installed on the right main rear cavity wall.

[0011] Furthermore, a sixth connecting hole is processed on the right main front cavity wall, and the second main cavity is connected with the second front sub-cavity through the sixth connecting hole; a seventh connecting hole is processed on the right main rear cavity wall, and the second main cavity is connected with the second rear sub-cavity through the seventh connecting hole; an eighth connecting hole is provided at the connection between the right main front cavity wall and the right main outer cavity wall, and the second main cavity is connected with the second front outer sub-cavity through the eighth connecting hole; a ninth connecting hole is provided at the connection between the right main outer cavity wall and the right main rear cavity wall, and the second main cavity is connected with the second rear outer sub-cavity through the ninth connecting hole.

[0012] Furthermore, a right main cavity cover is connected to the right main cavity wall, and the right main cavity cover includes a right main cavity cover body, a right main cavity cover variable angle connection block, a right main cavity cover wiring cover plate and a right main cavity cover body middle cover plate. The right main cavity cover body is connected to the right main cavity wall through a plurality of right main cavity cover variable angle connection blocks, and the bottom of the right main cavity cover body is respectively connected to the right main cavity cover wiring cover plate and the right main cavity cover body middle cover plate. A plurality of dynamic pressure measuring points are arranged on the inner and outer surfaces of the right main cavity cover body, and the dynamic sensor on the right main cavity cover body is connected to the amplifier through a cable inserted into the body.

[0013] Furthermore, the main body is installed with a main body middle upper cover and a main cavity outer wall wiring cover plate, the main body middle upper cover is arranged above the pressure measuring scanning valve block, and the main cavity outer wall wiring cover plate is arranged behind the main body middle upper cover.

[0014] Furthermore, an outer sub-cavity cover, a front sub-cavity cover and a rear sub-cavity cover are installed on the main body, and the outer sub-cavity cover, the front sub-cavity cover and the rear sub-cavity cover are arranged above the left main cavity assembly and the right main cavity assembly, and the two outer sub-cavity covers, the front sub-cavity cover and the rear sub-cavity cover are symmetrically arranged on the main body.

[0015] Furthermore, the bottom of the main body is connected to a main cavity bottom process cover plate and a main cavity bottom wiring cover plate.

[0016] The present invention has the following beneficial effects:

[0017] 1. A wind tunnel pressure test piece with multiple chambers connected in the present invention can ensure the measurement requirements between multiple chambers under different connection states, realize static and dynamic pressure measurement in the main chamber of the test piece, and can also take into account the pressure measurement of the inner and outer surfaces of the main chamber cover.

[0018] 2. A multi-chamber connected wind tunnel pressure test piece of the present invention has a main chamber on each side of the main body, four sub-chambers before and after the main chamber on one side, and a sub-chamber outside the main chamber. Different structural parts need to be replaced during the test to achieve different connection states between the main chamber and the sub-chamber. Static pressure measurement is performed in the left main chamber, and dynamic pressure measurement is performed in the right main chamber. The main chamber cover can be opened at different angles, and corresponding pressure measurements are performed on the inner and outer surfaces of the main chamber cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is an exploded view of a wind tunnel pressure test piece with multiple chambers connected;

[0020] Figure 2 It is a top view of a wind tunnel pressure test piece with multiple chambers connected;

[0021] Figure 3 It is a top view of the main body and the front rectifying body;

[0022] Figure 4 It is a top view of the subject;

[0023] Figure 5 is a schematic diagram of the left main chamber assembly;

[0024] Figure 6 is a schematic diagram of the left main chamber cover;

[0025] Figure 7 is a schematic diagram of the right main chamber assembly;

[0026] Figure 8 is a schematic diagram of the right main chamber cover.

[0027] In the figure: 1-front rectifier, 2-main body, 3-angle sensor, 4-left main chamber assembly, 5-left main chamber cover, 6-right main chamber assembly, 7-right main chamber cover, 8-external auxiliary chamber cover, 9-front auxiliary chamber cover, 10-rear auxiliary chamber cover, 11-main body middle upper cover, 12-pressure scanning valve block, 13-main chamber outer wall wiring cover, 14-support adapter, 15-support, 16-main chamber bottom process cover, 17- Main cavity bottom wiring cover, 18-left main front cavity wall, 19-left main outer cavity wall, 20-left main inner cavity wall, 21-left main rear cavity wall, 22-left main cavity cover body, 23-left main cavity cover variable angle connection block, 24-left main cavity cover wiring cover, 25-left main cavity cover body middle cover, 26-right main front cavity wall, 27-right main front cavity wall wiring cover, 28-right main outer cavity wall, 29-right main outer cavity wall wiring cover, 30-right main inner cavity wall, 31-right main rear cavity wall, 32-right main rear cavity wall wiring cover, 33-right main cavity cover body, 34-right main cavity cover variable angle connecting block, 35-right main cavity cover wiring cover plate, 36-right main cavity cover body middle cover plate, 37-first main cavity, 38-second main cavity, 39-first front sub-cavity, 40-second front sub-cavity, 41-first outer sub-cavity, 42-second outer sub-cavity, 43-first rear sub-cavity, 44-second rear sub-cavity, 45-first front outer sub-cavity, 46-second front outer sub-cavity, 47-first rear outer sub-cavity, 48-second rear outer sub-cavity, 49-first connecting hole, 50-second connecting hole, 51-third connecting hole, 52-fourth connecting hole, 53-fifth connecting hole, 54-sixth connecting hole, 55-seventh connecting hole, 56-eighth connecting hole, 57-ninth connecting hole. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0029] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection (i.e., non-detachable connection) includes but is not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1, combination Figure 1-Figure 8The present embodiment is described. A multi-cavity connected wind tunnel pressure test piece of the present embodiment comprises a front rectifying body 1, a main body 2, an angle sensor 3, a left main cavity assembly 4, a right main cavity assembly 6, a pressure scanning valve block 12, a support adapter 14 and a support 15. The front end of the main body 2 is connected with the front rectifying body 1 and the angle sensor 3. The main body 2 has a first main cavity 37 and a second main cavity 38. The first main cavity 37 and the second main cavity 38 are symmetrically arranged in the main body 2. A first front sub-cavity 39 and a first front outer sub-cavity 45 are arranged in front of the first main cavity 37. A first rear sub-cavity 43 and a first rear outer sub-cavity 47 are arranged behind the first main cavity 37. A first outer sub-chamber 41 is arranged on the outside, a second front sub-chamber 40 and a second front outer sub-chamber 46 are arranged in front of the second main chamber 38, a second rear sub-chamber 44 and a second rear outer sub-chamber 48 are arranged behind the second main chamber 38, a second outer sub-chamber 42 is arranged on the outside of the second main chamber 38, the left main chamber assembly 4 and the right main chamber assembly 6 are symmetrically installed on the main body 2, the left main chamber assembly 4 is arranged at the first main chamber 37, and the right main chamber assembly 6 is arranged at the second main chamber 38, the pressure measuring scanning valve block 12 and the amplifier are installed on the main body 2 and arranged between the first main chamber 37 and the second main chamber 38, and the bottom of the main body 2 is connected to the support 15 through the support adapter 14.

[0032] The front rectifying body 1 is a rectifying component for the test piece in the direction of the airflow in the wind tunnel. The main body 2 is the main component of the test piece. The first main cavity 37 and the second main cavity 38, the first front sub-cavity 39 and the second front sub-cavity 40, the first outer sub-cavity 41 and the second outer sub-cavity 42, the first rear sub-cavity 43 and the second rear sub-cavity 44, the first front outer sub-cavity 45 and the second front outer sub-cavity 46, the first rear outer sub-cavity 47 and the second rear outer sub-cavity 48 are symmetrically arranged on the left and right sides of the main body 2. The pressure scanning valve block 12 and the amplifier of the dynamic sensor are placed between the first main cavity 37 and the second main cavity 38. The angle sensor 3 is installed at the front end of the main body 2. The cables of the angle sensor 3, the pressure scanning valve block 12 and the amplifier are introduced into the support 15 after passing through the support adapter 14 from the bottom of the main body 2. The angle sensor 3 is a commonly used instrument in wind tunnel tests, and the attitude angle of the test piece is fed back during the test.

[0033] A left main cavity assembly 4 and a right main cavity assembly 6 are symmetrically installed in the main body 2. In this embodiment, the front rectifying body 1 affects the airflow direction of the wind tunnel. The right side of the main body 2 is dynamic pressure, and the left side is static pressure. The left main front cavity wall 18 and the left main rear cavity wall 21 are connected between the left main outer cavity wall 19 and the left main inner cavity wall 20 of the left main cavity assembly 4. A plurality of static pressure measuring points are arranged on each cavity wall of the left main cavity assembly 4 to realize the static pressure measurement of the inner wall surface of the main cavity. Pressure measuring tubes are arranged on the left main front cavity wall 18, the left main outer cavity wall 19, the left main inner cavity wall 20 and the left main rear cavity wall 21. The pressure measuring tubes of the left main front cavity wall 18, the left main inner cavity wall 20 and the left main rear cavity wall 21 are directly introduced into the main body 2 and connected with the pressure measuring scanning valve block 12. The pressure measuring tube of the left main outer cavity wall 19 is introduced into the main body 2 through the wiring groove at the bottom of the main cavity on the main body 2 and connected with the pressure measuring scanning valve block 12.

[0034] A first connecting hole 49 is machined on the left main front cavity wall 18, and the first main cavity 37 and the first front sub-cavity 39 are connected through the first connecting hole 49. A second connecting hole 50 is machined on the left main outer cavity wall 19, and the first main cavity 37 and the first outer sub-cavity 41 are connected through the second connecting hole 50. A third connecting hole 51 is machined on the left main rear cavity wall 21, and the first main cavity 37 and the first rear sub-cavity 43 are connected through the third connecting hole 51. A fourth connecting hole 51 is provided at the connection between the left main front cavity wall 18 and the left main outer cavity wall 19. 2. The first main cavity 37 is connected with the first front outer sub-cavity 45 through the fourth connecting hole 52. The connection between the left main outer cavity wall 19 and the left main rear cavity wall 21 is provided with a fifth connecting hole 53. The first main cavity 37 is connected with the first rear outer sub-cavity 47 through the fifth connecting hole 53. There are connecting holes between the main cavity and the corresponding sub-cavity on each cavity wall. During the test, different cavity wall parts are replaced as needed to realize different connecting states between the main cavity and the sub-cavity. Among them, the structure of the left main outer cavity wall 19 includes two small sub-cavity covers in front and behind the main cavity.

[0035] The left main chamber cover 5 is installed on the left main inner chamber wall 20. The left main chamber cover 5 includes a left main chamber cover body 22, a left main chamber cover variable angle connection block 23, a left main chamber cover wiring cover plate 24 and a left main chamber cover body middle cover plate 25. The left main chamber cover body 22 is connected to the left main inner chamber wall 20 through multiple left main chamber cover variable angle connection blocks 23. The bottom of the left main chamber cover body 22 is connected to the left main chamber cover wiring cover plate 24 and the left main chamber cover body middle cover plate 25. Multiple static pressure measuring points are arranged on the inner and outer surfaces of the left main chamber cover body 22, which can realize the static pressure measurement of the inner and outer surfaces of the left main chamber cover 5. The pressure measuring tube on the left main chamber cover body 22 is directly introduced into the main body 2 through the bottom of the left main chamber cover wiring cover plate 24 and connected to the pressure measuring scanning valve block 12. By replacing the left main chamber cover variable angle connection block 23 with different deflection angles, the test measurement requirements of the left main chamber cover body 22 under different opening angles can be realized.

[0036] The right main outer cavity wall 28 and the right main inner cavity wall 30 of the right main cavity assembly 6 are connected with the right main front cavity wall 26 and the right main rear cavity wall 31. A plurality of dynamic pressure measuring points are respectively arranged on the right main front cavity wall 26, the right main outer cavity wall 28, the right main inner cavity wall 30 and the right main rear cavity wall 31, so as to realize the dynamic pressure measurement of the inner wall surface of the main cavity. The dynamic sensor cables of the right main front cavity wall 26, the right main inner cavity wall 30 and the right main rear cavity wall 31 are directly introduced into the main body 2 through corresponding wiring and connected with the amplifier. The dynamic sensor cable of the right main outer cavity wall 28 is introduced into the middle space of the main body 2 through the wiring groove at the bottom of the main cavity on the main body 2 and connected with the amplifier.

[0037] The right main front cavity wall 26 is processed with a sixth connecting hole 54, and the second main cavity 38 is connected with the second front sub-cavity 40 through the sixth connecting hole 54. The right main rear cavity wall 31 is processed with a seventh connecting hole 55, and the second main cavity 38 is connected with the second rear sub-cavity 44 through the seventh connecting hole 55. The connection between the right main front cavity wall 26 and the right main outer cavity wall 28 is provided with an eighth connecting hole 56, and the second main cavity 38 is connected with the second front outer sub-cavity 46 through the eighth connecting hole 56. The connection between the right main outer cavity wall 28 and the right main rear cavity wall 31 is provided with a ninth connecting hole 57, and the second main cavity 38 is connected with the second rear outer sub-cavity 48 through the ninth connecting hole 57. There are connecting holes between the main cavity and the corresponding sub-cavity on each cavity wall. During the test, different cavity wall parts are replaced as needed to achieve different connection states between the main cavity and the sub-cavity. Among them, the structure of the right main outer cavity wall 28 includes two small sub-cavity covers in front and behind the main cavity.

[0038] The right main cavity cover 7 is installed on the right main cavity wall 30, and the right main cavity wall 30 is connected with the right main cavity cover 7. The right main cavity cover 7 includes a right main cavity cover body 33, a right main cavity cover variable angle connection block 34, a right main cavity cover wiring cover plate 35 and a right main cavity cover body middle cover plate 36. The right main cavity cover body 33 is connected to the right main cavity wall 30 through a plurality of right main cavity cover variable angle connection blocks 34. The bottom of the right main cavity cover body 33 is respectively connected to the right main cavity cover wiring cover plate 35 and the right main cavity cover body middle cover plate 36. The inner and outer surfaces of the right main cavity cover body 33 are provided with a plurality of dynamic pressure measuring points, which can realize the dynamic pressure measurement of the inner and outer surfaces of the right main cavity cover 7. The dynamic sensor on the right main cavity cover body 33 is connected to the amplifier through the cable inserted into the body 2. By replacing the right main cavity cover variable angle connection block 34 with different deflection angles, the experimental measurement requirements of the right main cavity cover body 33 under different opening angle states can be realized.

[0039] Embodiment 2, combined Figure 1-Figure 8 To illustrate this embodiment, a multi-cavity connected wind tunnel pressure test piece of this embodiment further includes an outer sub-cavity cover 8, a front sub-cavity cover 9, a rear sub-cavity cover 10, a main body middle upper cover 11 and a main cavity outer wall wiring cover 13;

[0040] The outer sub-cavity cover 8 is used as a sealing outer sub-cavity structure and is symmetrically installed on the main body 2. Each time the left main outer cavity wall 19 and the right main outer cavity wall 28 of different flow states are replaced, the outer sub-cavity cover 8 must be removed first;

[0041] The front sub-cavity cover 9 is used as a structural component for sealing the front sub-cavity. Each time when the left main front cavity wall 18 and the right main front cavity wall 26 of different flow states are replaced, the front sub-cavity cover 9 needs to be removed first;

[0042] The rear sub-cavity cover 10 is used as a structural component for sealing the rear sub-cavity. Each time when the left main rear cavity wall 21 and the right main rear cavity wall 31 of different flow states are replaced, the rear sub-cavity cover 10 needs to be removed first.

[0043] The upper cover 11 in the main body is used to seal the middle space of the main body 2 to prevent the pressure scanning valve block 12, amplifier and cables therein from being exposed to the test airflow. The pressure scanning valve block 12 is a commonly used instrument for wind tunnel tests. During the test, it feeds back the pressure values ​​of various static measuring points on the test piece. Its cables are introduced into the support 15 through the circular hole in the middle of the main body 2.

[0044] The wiring cover plate 13 on the main cavity outer wall is a plastic structural part of the test piece. The static pressure measuring tube of the left main outer cavity wall 19 and the dynamic sensor cable of the right main outer cavity wall 28 are introduced into the main body 2 through the wiring groove on the main body 2 below this cover plate. The support adapter 14 connects the main body 2 and the support 15. There are multiple connection holes arranged around the central axis. Connecting different holes with the support 15 can achieve corresponding sideslip angles and realize pressure measurement under different sideslip angles of the test piece. The support 15 is used to connect the test piece in the wind tunnel. By connecting different holes on the support adapter 14, different sideslip angles of the test piece can be realized.

[0045] The main cavity bottom process cover plate 16 and the main cavity bottom wiring cover plate 17 are plastic structural parts of the test piece. The main cavity bottom process cover plate 16 is removed under the main cavity of the main body 2 to facilitate the integrated processing of the static measuring points and dynamic sensor mounting holes of the main cavity bottom. The static pressure measuring tube and dynamic sensor cable of the main cavity bottom are introduced into the main body 2 through the wiring groove between the main cavity bottom wiring cover plate 17 and the main body 2.

[0046] This embodiment is only an exemplary description of the present invention and does not limit its protection scope. Those skilled in the art may also make partial changes thereto. As long as they do not exceed the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A wind tunnel pressure test piece with multiple chambers connected, characterized in that: The invention comprises a front rectifying body (1), a main body (2), an angle sensor (3), a left main chamber component (4), a right main chamber component (6), a pressure measuring scanning valve block (12), a support adapter (14) and a support (15); the front end of the main body (2) is connected to the front rectifying body (1) and the angle sensor (3); the main body (2) has a first main chamber (37) and a second main chamber (38); the first main chamber (37) and the second main chamber (38) are symmetrically arranged in the main body (2); a first front sub-chamber (39) and a first front outer sub-chamber (45) are arranged in front of the first main chamber (37); a first rear sub-chamber (43) and a first rear outer sub-chamber (47) are arranged behind the first main chamber (37); and a first outer sub-chamber (48) is arranged outside the first main chamber (37). 1), a second front sub-chamber (40) and a second front outer sub-chamber (46) are arranged in front of the second main chamber (38), a second rear sub-chamber (44) and a second rear outer sub-chamber (48) are arranged behind the second main chamber (38), a second outer sub-chamber (42) is arranged outside the second main chamber (38), a left main chamber component (4) and a right main chamber component (6) are symmetrically mounted on the main body (2), the left main chamber component (4) is arranged at the first main chamber (37), and the right main chamber component (6) is arranged at the second main chamber (38), a pressure scanning valve block (12) and an amplifier are mounted on the main body (2) and arranged between the first main chamber (37) and the second main chamber (38), and the bottom of the main body (2) is connected to the support (15) through a support adapter (14).

2. The multi-cavity connected wind tunnel pressure test piece according to claim 1, characterized in that: The left main chamber assembly (4) comprises a left main front chamber wall (18), a left main outer chamber wall (19), a left main inner chamber wall (20) and a left main rear chamber wall (21); the left main front chamber wall (18) and the left main rear chamber wall (21) are connected between the left main outer chamber wall (19) and the left main inner chamber wall (20); a plurality of static pressure measuring points are respectively arranged on the left main front chamber wall (18), the left main outer chamber wall (19), the left main inner chamber wall (20) and the left main rear chamber wall (21); pressure measuring tubes are respectively arranged on the left main front chamber wall (18), the left main outer chamber wall (19), the left main inner chamber wall (20) and the left main rear chamber wall (21); each pressure measuring tube is connected to the pressure measuring scanning valve block (12).

3. The multi-cavity connected wind tunnel pressure test piece according to claim 2, characterized in that: A first connecting hole (49) is machined on the left main front cavity wall (18), and the first main cavity (37) and the first front sub-cavity (39) are connected through the first connecting hole (49); a second connecting hole (50) is machined on the left main outer cavity wall (19), and the first main cavity (37) and the first outer sub-cavity (41) are connected through the second connecting hole (50); a third connecting hole (51) is machined on the left main rear cavity wall (21), and the first main cavity (37) and the first rear sub-cavity (43 ) are connected via a third connecting hole (51); a fourth connecting hole (52) is provided at the connection between the left main front cavity wall (18) and the left main outer cavity wall (19); the first main cavity (37) and the first front outer sub-cavity (45) are connected via the fourth connecting hole (52); a fifth connecting hole (53) is provided at the connection between the left main outer cavity wall (19) and the left main rear cavity wall (21); the first main cavity (37) and the first rear outer sub-cavity (47) are connected via the fifth connecting hole (53).

4. The multi-cavity connected wind tunnel pressure test piece according to claim 3, characterized in that: The left main cavity wall (20) is connected to a left main cavity cover (5), the left main cavity cover (5) comprising a left main cavity cover body (22), a left main cavity cover variable angle connection block (23), a left main cavity cover wiring cover plate (24) and a left main cavity cover body middle cover plate (25); the left main cavity cover body (22) is connected to the left main cavity wall (20) via a plurality of left main cavity cover variable angle connection blocks (23); the bottom of the left main cavity cover body (22) is connected to the left main cavity cover wiring cover plate (24) and the left main cavity cover body middle cover plate (25); a plurality of static pressure measuring points are arranged on the inner and outer surfaces of the left main cavity cover body (22); a pressure measuring tube on the left main cavity cover body (22) is connected to a pressure measuring scanning valve block (12).

5. The multi-cavity connected wind tunnel pressure test piece according to claim 1, characterized in that: The right main cavity assembly (6) comprises a right main front cavity wall (26), a right main outer cavity wall (28), a right main inner cavity wall (30) and a right main rear cavity wall (31); the right main front cavity wall (26) and the right main rear cavity wall (31) are connected between the right main outer cavity wall (28) and the right main inner cavity wall (30); and a plurality of dynamic pressure measuring points are respectively arranged on the right main front cavity wall (26), the right main outer cavity wall (28), the right main inner cavity wall (30) and the right main rear cavity wall (31). The dynamic sensors respectively arranged on the right main front cavity wall (26), the right main outer cavity wall (28), the right main inner cavity wall (30) and the right main rear cavity wall (31) are connected to the amplifier on the main body (2) via cables; the right main front cavity wall (26) is provided with a right main front cavity wall wiring cover (27); the right main outer cavity wall (28) is provided with a right main outer cavity wall wiring cover (29); and the right main rear cavity wall (31) is provided with a right main rear cavity wall wiring cover (32).

6. The multi-cavity connected wind tunnel pressure test piece according to claim 5, characterized in that: A sixth communication hole (54) is machined on the right main front cavity wall (26), and the second main cavity (38) and the second front sub-cavity (40) are connected through the sixth communication hole (54). A seventh communication hole (55) is machined on the right main rear cavity wall (31), and the second main cavity (38) and the second rear sub-cavity (44) are connected through the seventh communication hole (55). An eighth communication hole (56) is provided at the connection between the right main front cavity wall (26) and the right main outer cavity wall (28), and the second main cavity (38) and the second front outer sub-cavity (46) are connected through the eighth communication hole (56). A ninth communication hole (57) is provided at the connection between the right main outer cavity wall (28) and the right main rear cavity wall (31), and the second main cavity (38) and the second rear outer sub-cavity (48) are connected through the ninth communication hole (57).

7. The multi-cavity connected wind tunnel pressure test piece according to claim 6, characterized in that: The right main cavity wall (30) is connected to a right main cavity cover (7), the right main cavity cover (7) comprising a right main cavity cover body (33), a right main cavity cover variable angle connection block (34), a right main cavity cover wiring cover plate (35) and a right main cavity cover body middle cover plate (36). The right main cavity cover body (33) is connected to the right main cavity wall (30) via a plurality of right main cavity cover variable angle connection blocks (34), the bottom of the right main cavity cover body (33) is connected to the right main cavity cover wiring cover plate (35) and the right main cavity cover body middle cover plate (36), the inner and outer surfaces of the right main cavity cover body (33) are provided with a plurality of dynamic pressure measuring points, and the dynamic sensor on the right main cavity cover body (33) is connected to the amplifier via a cable inserted into the body (2).

8. A wind tunnel pressure test piece with multiple chambers connected according to claim 4 or 7, characterized in that: The main body (2) is provided with a main body middle upper cover (11) and a main cavity outer wall wiring cover plate (13); the main body middle upper cover (11) is arranged above the pressure measurement scanning valve block (12), and the main cavity outer wall wiring cover plate (13) is arranged behind the main body middle upper cover (11).

9. The wind tunnel pressure test piece with multiple connected chambers according to claim 8, characterized in that: An outer sub-cavity cover (8), a front sub-cavity cover (9) and a rear sub-cavity cover (10) are installed on the main body (2); the outer sub-cavity cover (8), the front sub-cavity cover (9) and the rear sub-cavity cover (10) are arranged above the left main cavity assembly (4) and the right main cavity assembly (6); and two pairs of outer sub-cavity covers (8), the front sub-cavity cover (9) and the rear sub-cavity cover (10) are symmetrically arranged on the main body (2).

10. The wind tunnel pressure test piece with multiple connected chambers according to claim 9, characterized in that: The bottom of the main body (2) is connected to a main cavity bottom process cover plate (16) and a main cavity bottom wiring cover plate (17).

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